USRE22999E - Feinting control means foe cash - Google Patents

Description

Reg 22,999

May 11, .1948.

E. C. CARTER ET AL PRINTING CONTROL MEANS FOR CASH REGISTERS Original Filed June 14; 1945 4 Sheets-Sheet 1 Elmer C. Carter and Charles G. Dudis Inventor:

By M

Their Attorney y 1948' r; c. CARTER ET AL Re. 22,999

PRINTING CONTROL MEANS FOR CASH REGISTERS Original Filed June 14, 1943 4 Sheets-Sheet 2 FIG. 5,.78

Elmer G. Cane r and Ch'axlcs G. Dudis Invcntoi'a- Thoir Attorn'cy I 1948. E. c. CARTER ET AL Re. 22,999

PRINTING CONTROL MEANS FOR QASH REGISTERS Original Filed June 14, 1943 4.Sheets-Sheet 3 9 383 3 7 386 El mcr C. Carter and Charles G. Dudis Inventor:

WWW

' Their Attorney 1948. E. c. CARTERET AL Re. 22,999

PRINTING CONTROL MEANS FOR CASH REGISTERS Original Filed June 14, 194! 4 Sheets-Sheet 4 Elmer C. Carter and Charles G. Dudis Inventors WWW Their Attorney Reiuned May 11, 1948 R 22,999

PRINTING CONTROL DIEANS FOR CASH REGISTERS Elmer 0. Carter, West Milton, and Charles 'G. Dudls, Dayton, Ohio, asslgnors to The Natlonal Cash Register Company, Dayton, OhioI a corporation of Maryland I Original No. 2,416,792, dated March 4, 1947, Serial No. 490,750, June 14 issue February 18,

Claims.

This invention relates to cash registers and accounting machines of the type shown in United States Letters Patent Nos. 1,812,194 and 1,963,733, issued June 30, 1931, and June 19, 1934, respectively, to Samuel Brand; Nos. 1,817,883 and 1,865,147, issued August 4, 1931, and June 28, 1932, respectively, to Bernis M. Shipley; and No. 2,154,381, issued April 11, 1939, to John H. Gruver, and is directed to the printing mecha- 1948. Application for re- 1948, Serial No. 8,138

for the rebound-preventing pawls usually employed in connection with the printing hammers.

It is therefore an object 01' this invention to provide simple means for reducing the noise incident to the operation or the printing hammer operating mechanism.

Another object is the provision of means for alleviating the load normally placed on the machine operating mechanism by the printing hamhisms of such machines. mer operating devices.

In machines of this type, selective control An additional object is the provision of means means is provided for controlling the operativefor eliminating the need for the usual reboundness of the difl'erent printing hammers so that preventing pawls used in connection with the only the desired hammer or hammers will be opprinting hammers. erative during certain kinds of operations. Pre- A further object is the provision of means emviously, operating devices, actuated by strong ploying much lighter springs than those normally springs, were provided for each or said hammers, used for Operating t priptlng h all of said devices being actuated simulta- Another object is to provide printing hammer neously during each operation of the machine, actuating means, the etfectivity of said means regardless of the operativeness of the diilerent being controlled by said printing hammer. printing hammers. The many idle operations An additional object is to provide means conthus performed by these devices produced untrolled by the printing hammer ior determining necessary Wear and strain upon their component 4 the effectivity of the printing hammer operating parts, resulting in acertain amount of breakage means. of certain of said parts, and, in general, short- Another object is to provide novel means for ening the life of some of the other of said parts. controlling the efiectivity oi the printing ham- In addition, the simultaneous actuation of all 0! mer operating means. said devices during each operation of the ma- A further object is to provide mean 10 yenchine placed a heavy load on the machine opdering the printing hammer actuating mechacrating mechanism and created considerable so nism inoperable whc'i the printing hammer is noise incident to the operation 01' said devices. inoperative.

The present invention provides individual de- A still further object is to provide means for vices, each employing a comparatively light operating a plurality f printing hamm spring for actuation thereoi, for operating the tuating devices in any selective order under condiflerent printing hammers, each device being trol of the printing hammers. actuated only when its appropriate printing With these and incidental objects in view, the hammer is operative. These devices are so arinvention includes certain novel features 01 conranged that, if more than one printing hammer truction and combinations 01' parts, the essenis to be operated during the same operation oi. tial elements or which are set forth in appendthe machine, certain of said devices will be ac- 0 ed claims and a preferred form or embodiment tuated in alternating order. The elimination of which is hereinafter described with reference of the idle operations of said devices, alternatto the drawings which accompan and form a ing the order of actuation of certain of said depart of this specification. vices, and the use of lighter springs for the 9.0- Of said drawings: tuation thereof have resulted in less breakage Fig. 1 shows the control key bank and its dif- Qf certain oi the parts in said printing mechaierential mechanism. nism, as well as greatly increased the life of Fig. 2 is a detail of the means controlled by other of said parts. In addition, the heavy load the control keys for superseding the control exnormally placed on the machine operating ercised by the total control lever over the opermechanism by the operation of said device has ativeness oi the printing hammers. been greatly alleviated, and the noise formerly Fig. 3 is a detail view of a portion 01' the means occasioned by the simultaneous operation of all for controlling the operativeness oi the printing oi said devices during each operation or the hammers. machine has been considerably reduced. The Fig. 4 is a detail view of the item printing ham-- present invention has also eliminated the need as mer and the o erating device therefor.

Fig. 5 is a detail view 01' a portion of the actuating device for the electro total printing hammer, together with the means for retaining'said device in its retracted position.

Fig. 6 is a detail view oi the operating device for the electro printing hammer, together with the means for retaining said device in its retracted position.

Fig. 7 is a detail view of the lower printing hammer and the operating device therefor, as well as the means for retaining said device in its retracted position.

Fig. 8 is a detail view of the means for maintaining the lower printing hammer in the proper position for means to coact therewith to control its operativeness.

Fig. 9 is a detail plan view of the various upper impression hammers, their operating devices, and the means for retaining said devices in their retracted positions.

Fig. 10 is a detail view of the total lever and means controlled thereby for controlling the operativeness oi the various printing hammers, together with other means also controlled by said lever to supersede the control of the first-mentioned means during sub-total operations.

Fig. 11 is a detail of the latching device to control the operation of the lower hammer.

The present invention is illustrated as applied to a machine of the type disclosed in the abovementioned Shipley and Brand patents. In this type of machine, type carriers are provided, which are adjusted difierentially under control of depressible keys. The printing mechanism is adapted to print and issue an itemized receipt. as well as print on a detail strip or on an inserted slip. Three upper printing hammers--viz., item. total, and electro-are provided to make impressions on the receipt paper, while a single lower printing hammer is provided for making impressions on the detail strip.

When the items oi. a multiple-item transaction or a single-item transaction are printed, all of the hammers except the item hammer, are disabled. The item hammer is wide enough to print from all amount type carriers and from the clerks and transaction type carriers. The total hammer prints from the remaining type carriers shown in the upper left part of Fig. 9.

When the total of a multiple-item transaction or of a single-item transaction is printed, both the item hammers and the total hammers are operated simultaneously to print from their appropriate type carriers, while the electro hammer is operated at a different time to print the name of the store, the date, and any other desired information. The lower printing hammer is operated at a still different time in the operation to print on the detail strip the total amount, as well as the clerks and transaction characters.

The usual total control lever is employed herein to condition the machine for single-cycle adding operations and two-cycle total or sub-total operations. The total lever also controls the operativeness of the different printing hammers. For example, when the total lever is in its normal "add" position, all of the printing hammers, except the item hammer, are rendered inoperative. When the total lever is moved to its sub-total position, all of the hammers, except the item hammer, are rendered inoperative. On the other hand, if the total lever is moved to its total position, all of the printing hammers are rendered operative.

Individual operating devices are provided for 4 each of the printing hammers, which devices are adapted to be first retracted against the action 01' separate springs and then released to the action of said springs to operate their corresponding hammers.

The present invention provides means for retaining said operating devices in their retracted positions to prevent idle operation thereof when the printing hammer are to be inoperative. If the printing hammers have been rendered operative, they will control said means so that the operating devices will not'be retained in retracted positions and consequently will be free to operate their corresponding hammers.

Dnrmnn Dsscarrrron Keys and differential mechanism is superseded by the control of what i known as a transaction or control bank of keys, when a no-sale operation is performed, this bank of keys and the differential mechanism associated therewith are illustrated herein (Fig. l) and will be briefly described. This bank comprises six transaction keys E I carried by the usual key frame 52 supported on cross rods 63 and 64 mounted in the machine side frames, only one of which is shown (Fig. 9). Beginning with the top transaction key BI and proceeding downwardly, the keys bear the captions Groceries, Produce, Dairy, Special, Grand total, and No sale. Only the lowermost bar or No sale key SI is adapted to control means for superseding the control normally exercised by the total lever over the operativeness of the printing hammers, as will be described later.

When any one of the transactions keys BI is depressed, it is retained in such position by means such as that shown and described in the abovementioned Shipley patent.

The keys 6i control the setting of the difierential mechanism, which in turn controls the setting of type wheels in an old and well-known manner. Briefly, the differential mechanism includes a differentially adjustable arm 65 (Fig. 1) freely mounted on a rod 66 supported by the machine side frames. The arm 65 is releasably connected to a driver 51, freely mounted on the rod ii, by means of the usual latch 68, held against the driver 51 by a spring 60. The driver 81 is connected by a link 69 to a lever 10 pivoted at H. The lever 10 carries roller 12 and 13 cooperating with cams 14 and 15, respectively, secured to a main drive shaft 16. The shaft 75 rotates in a clockwise direction and is given one complete revolution during each single-cycle adding operation and two complete revolutions during each total or sub-total operation, as will be described later.

Upon each complete clockwise rotation of the shaft 16, the latter, through the cams ll- 15, the lever 10, and the link 89, moves the driver 61 first clockwise and then counter-clockwise. This driver, through the latch 68, carries the dif ferentiai arm with it until an end of a bell crank 11, which, together with a link 18, supports the latch 68. contacts and is stoppedby the inner end of whichever one of the'keys II is depressed. when this occurs, the latch II is withdrawn from a shoulder I9 formed on the periphery of the driver 61, and the latter continues its regular excursion in a clockwise direction. Upon return counter-clockwise movement of the driver 61, the latch 68 again affects the driving connection between the differential arm II and the driver 61, under the influence of the spring ill, when the driver reaches the position in which said latch 68 had been disengaged from the driver 61.

The differential arm 65 has pivoted thereto one end of the usual beam 80, t e other end of the beam being bifurcated to embrace a stud II in a link l2. one end of said link being pivoted to an arm 81 secured to the sleeve 84 on a shaft ll journaled in the machine side frames.

Considering the parts to be in the positions shown in Fig. 1, the clockwise movement of the diflerentially adjustable arm 55 moves the left end of the beam 80 upwardly, thus lowering the right end thereof, at the ame time lowering the link 82 to rock the arm 83 and the sleeve II in a clockwise direction.

To insure that the right end of the beam 80 is positioned correspondingly to the differential setting of the left'end thereof, the lever IIl carries a roller 82, which roller contacts the under side of the beam 80, moving it positively, -so that its upper edge contacts a collar 93 mounted on the rod 86.

The sleeve 8| has secured thereto a segment ll meshing with a segment 95 loose on a stud I. mounted in the left side frame 85 of the machine. The segment 95 has secured thereto a cam arm 91, which is difierentially adjusted under control of the transaction keys 6i. The cam arm 91 controls means for superseding the control normally exercised by the total control lever over the printing hammers, as will be more fully explained hereinafter. Due to the beam construction for setting the link '82 and the cam arm 91, the cam arm 91 remains in the position in which it wasset at the end of the operation of the machine; that is. it does not return to its normal position, due to the fact that the right end of the beam 80 and the link 82 always remain at the end of each operation, in the position in which they were set during that operation.

It is not'thought necessary to go into any detailed description of the mechanism for driving the main drive shaft 16, and therefore brief mention will be made as to how this shaft receives its motion. Any well-known drive mechanism may be used to operate this shaft, such as an electric motor of the type illustrated and described in the United States Patent No. 1,144,418, issued to Kettering and Chryst on June 29, 1915.

Sometimes it is desirable to operate the type of machine herein referred to by hand, and for the accomplishment of this purpose the shaft I8 has secured thereon a gear 98 (Fig. 10) meshing with a gear 98, the latter being twice the diameter of the -former,'and is freely mounted on a screw stud I00 supported in the right-hand machine side frame (not shown). As shown in the previously-mentioned Brand Patent No 1,812,194, this last gear 9! may be given onehalf rotation by a manually operable handle,

which half-turn gives the gear II and the drive shaft II a complete clockwise rotation.

Printing mechanism The printing mechanism in machines of the type to which this invention relates is usually located at the left side of the machine. A printer frame III (Fig. 9), spaced apart from the left side frame It by studs I" (only one being shown), supports substantially all of the printing mechanism.

The printing mechanism includes type carriers IN (Figs. 4, "l, and 9). from which the receipt and the detail strip or slip are printed, certain of such type carriers being adjusted diflerentially under the control of depressed keys and supported by nested sleeves Ilii extending laterally from the left side frame It through the'printer frame Illl, the remaining type carriers being adiusted by any suitable means illustrated and described ln the previously-mentioned Shipley and Brand patents.

Three upper printing hammers (Figs. 4, 5, and 9), which include an item hammer I I I and a total hammer H2. are provided to take impressions from the type carriers llll and print the same on the receipt. An electro hammer III takes impressions from an electrotype plate (not shown). Two cams III and IIS (Figs. 4 and 6) are provided to actuate these three hammers, the cam I ll being adapted to actuate the electro hammer III, and the cam H5 being adapted to actuate the item hammer II I and the total hammer I II. The connection between the cam IIS and the hammers III and I I2 will be described presently. A lower printing hammer 22I (Fig. 7) is provided for taking impressions from the type carriers and printing the same -on a detail strip or inserted slip. A cam 23I is provided for eflecting the actuation of the hammer I.

Item and total hammer operating mechanism The item hammer III and the total hammer H2 are pivoted on a rod H6 (Figs. 4, 6, and 9) secured in the printer frame II and an auxiliary frame III supported by studs mounted on the frame IBI. A ball Ill, connecting arms H9 and Ill, free on the rod H6, is provided for use in connection with the operation of the hammers III and III. Loosely mounted on the rod H6 and secured to the arm H9 of the bail III is an arm III, which is connected by a link In to an operating lever in pivotally mounted on a stud I24 secured to the printer frame IOI. The lever I23 is provided with a nose I25 adapted to cooperate with the cam H5.

The ball 8 overlies a finger ll! of an operating arm I38 freely mounted on the rod Iii. A spring I31 constantly tends to rock the arm I38 counter-clockwise, thus maintaining the finger I35 in cooperative relationship with the bail H8. The arm I" also has a forwardly extending arm I38 adapted to coact with a roller I39 loosely mounted on a stud HI! secured to the hammer III. A spring Ill (Figures 4 and 9) normally tends to rock the hammer III clockwise, but the arm I 38 normally coaots with the roller I39 to limit such movement to such an extent that the platen of the printing hammer III is maintained in a position just clear of the type carrier IIII.

One end of the spring I is connected to the stud II, and its other end is connected to the stud IIlI (Figs. 6 and 9) on an arm 2B0 of a yoke 1M, hereinafter described, which oke is carried by the rod IIB.

drive shaft I42 Journaled in the leit side frame 83,

and the printer side i'rame IOI. The shaft I42 is given one complete clockwise rotation during each cycle of operation of the machine by the train of gears I36, I3I, and I32 (Fig. driven by the shaft 16. Upon the clockwise rotation of the shaft I42, a lobe I43 on the cam will coact with the nose I to rock the lever I23 clockwise, whereupon the link I22, the arm I, and the bail II8 will rock the arm I36 clockwise against the action of the spring I31. Assuming that the item hammer III has been rendered inoperative at this time, by means to be described later, the arm I38 will move awa from the roller I35, but the spring I will not rock the hammer III clockwise, since it has been rendered inoperative.

Pivotally mounted on a rod I44, carried by the printer i'rame I6I and the auxiliary frame III, are an arm I and a pawl I46, resiliently connected together by a spring I41 secured to a stud I48 in the pawl I46 and to a stud I48 in the arm I45, thus normally maintaining the pawl I46 against the stud I49. The -free end 01' the pawl I46 normally engages a notch I53 in the arm I36. A spring I52 constantly tends to rock the arm I 45 and, through the stud I49, the pawl I46 clockwise, but is normally prevented from doing so by the engagement of the pawl I46 with the notch I50 in the ar I36.

However, when the arm I36 is rocked clockwise by the cam I I5, as described above, the spring I52 will rock the arm I45 and the pawl I46 clockwise until the arm I45 strikes a rod I53 supported in the frames IUI and H1. This clockwise movement of the pawl I46 positions the free end thereof in front of a finger I54 on the arm I36, thus preventing counter-clockwise return movement of the arm I36 under influence or its spring I31.

Therefore, when the lobe I43 clears the nose I25, the spring I31 cannot function to operate the hammer III and the lever I23. The link I22, the arm I2I, the bail H8, and the arm I36 will be held in their cocked or retracted positions by the pawl I46 until an operation of the machine in which the printing hammer I II is rendered operative.

With such an arrangement, all idle operations of the operating means for the printing hammer I I I are eliminated, thereby reducing the amount of wear and strain on the parts constituting such means, as well as greatly reducing the noise incident to their operation.

It is during the first cycle of a total operation that the hammer III is rendered inoperative, by means described later, and it is during such cycle that the end of the pawl I 46 is moved in front of the finger I54 (Fig. 4) of the operating arm I36, and, at the same time a finger I6I of the arm I45 is moved into contact with the upper surface of the hammer III.

During the second cycle of the total operation, when the lobe I43 strikes the nose I25 of the lever I23, the hammer III and the arm I36 are moved slightly. The hammer III, through the finger I6I, rocks the arm I45 counter-clockwise and stretches the spring I41, and, just before the lobe I43 passes ofi the nose I25, the arm I36 is moved just enough to relieve the pressure on the end of the pawl I 46, whereupon the tensioned spring I41 rocks the pawl I46 counter-clockwise, again placing its end in front of the notch I53. Therefore, when the lobe I43 passes of! the nose I25, the spring I31 rocks the arm I36 counterclockwise very rapidly, and the arm I33, through the roller I33, rocks the hammer III with sun!- cient force to cause it to print from the type carriers I 64.

1!, on the other hand, the printing hammer III had been operative at the time the arm I36 During such clockwise movement of the hammer III, the upper edge thereof and the pawl I46 clockwise, thus maintaining the latter arm opposite the notch I58. This permits the arm I36, after the lobe I43 has cleared the nose I 25, to be rocked rapidly counterclockwise by the spring I31 to impart the necessary counter-clockwise movement to the printing hammer III to take an impression from the type carriers I64.

The counter-clockwise movement given to the arm I36 by the spring I31 is limited by a finger I of the lever I23 striking a stationary block I62, and the hammer III. continues on under momentum to make the print.

It will also readily be seen from the above that cooperation of the pawl I46 with the arm I36 prevents any rebound oi the printing hammer III, which might result in an accidental operation thereof. It is thereiore possible in the present invention to eliminate the usual reboundpreventing pawls used in printing mechanism 0i this type.

The total hammer H2 is actuated by the cam H5 in the same manner as just described for the item hammer III. The total hammer II2 has associated therewith an operating arm in (Figs. 5 and 6). The arm I" has a finger I12 cooperating with the bail I I6. An arm I13 integral with the arm I1I cooperates with a stud I14 on the total hammer H2. A spring I15 normally holds the stud I 14 against the arm I13.

Also associated with the total hammer 2 are an arm I16 and a pawl I11, resiliently connected together by a spring I16. A spring I13 constantly tends to rock the arm I16 and the pawl I11 clockwise but i normally prevented from doing so by the engagement of the end of the arm I16 with a notch I88 01' the arm "I.

Upon the clockwise rotation of the cam N5, the lobe I43 rocks the lever I23 and the bail III I" clockwise against the action of a spring I82. If at this time the total hammer H2 is inoperative, the spring I19 will rock the arm I16 clockwise and, through a stud I83 carried thereby, will rock the pawl I11 clockwise to position the free end thereof in front of a finger I84 on the arm IN to prevent counter-clockwise return movement of said arm I under the influence of it spring I82.

Therefore, when the lobe clears the nose I 25, thereby releasing the lever I23 and the bail for return to their normal positions, the pawl I11,

being in front of the finger I34, will prevent the a pring I82 from rocking the arm I1I' counterclockwise, and the total hammer I I2 will be held in its cocked or retracted positions.

The pawl I11 (Fig, 5) is released from the finger I84 in the same manner that the arm I46 is released from the finger I54.

During the second cycle of a total operation, the upper side of the hammer II2, through a finger I85 on the arm I13, rock said arm and some 9 tensions the spring I10 and then, when the arm "I relieves the pressure between the end of the pawl I11 and the finger III, the tensioned spring I10 rocks the pawl I11 counter-clockwise I to place it opposite the notch I90. Now, when the lobe I42 clears the nose I25 on the lever I29, the spring I82 will rock the arm "I and the lever I22 counter-clockwise until the finger I of the lever, I29 strikes the block I92. Upon such rapid clockwise movement or the arm I",

the arm I18, through the stud I14, actuates the total hammer H2, in the same manner as described above for the item hammer III, to take an impression from the type carriers I04;

If, on the other hand, the total hammer II2 had been operative when the arm "I was rocked clockwise, as mentioned above, the spring I10 would have rocked the total hammer II2 clockwise until the upper edge thereof contacted the finger I85 and rocked the arm I18 slightly counter-clockwise against the action of a spring I19 to maintain the pawl I11 in its normal position in front of the notch I90, so that the hammer I I2 would operate to print.

It will be seen from the foregoing that the item hammer III and the total hammer II2 each controls the effectiveness of its respective operating arm I96 and HI. The means by which the total lever controls the operativeness oi the hammers I II and H2 will be described hereinafter.

Electro printing hammer operating mechanism A separate train of mechanism is provided to actuate the electro hammer H3, This train of mechanism is the same in principle of operation as that previously described herein for the item hammer III and the total hammer II2.

Associated with the electro hammer H3 is a cam II4 (Fig. 6). which is also secured to the shaft I42. The cam H4 is provided with a lobe I95 adapted to coact with a nose I98 on an operating lever I91 pivoted on the stud I 24. The lobe I95 is so located on the cam II4 that the lever I91 will be actuated thereby before the lever I23, associated with the item hammer III and the total hammer H2 is actuated by the cam II By such arrangement, the electro printing hammer H3 is operated at a diil'erent time in the operation from the time at which the item hammer III and the total hammer II2 are operated; thus a certain amount of the noise incident to the simultaneous operation of all three hammers is eliminated, and a better distribution of the load placed on the machine operating mechanism is effected.

The lever I91 is connected by a link I99 to an arm I93, pivoted on the rod H9, and is connected to another arm 200 by a ball I. A spring 202 normally maintains th hammer III in a position where a lug 203 thereon rests against the under side of the bail 20I. The bail 20I has a finger 204 on the upper edge thereof. Pivotally mounted on the rod I44 are an arm 205 and a pawl 209 resiliently connected together by a spring 201. A press 200 constantly tends to rock the arm 205 and the pawl 206 clockwise. The arm 205 carries a stud 209, which coacts with the upper edge of the pawl 206 to rock the latter clockwise when the arm 205 i so rocked by the spring 208. The pawl 206, however, normally rests on top of the finger 204 and is thereby held against clockwise movement by the spring 209, as is also the arm 205.

It will thus be seen from the above that, when 10 the lever I I1 is rocked clockwise by the cam III, the arms I99 and 200 and the ball 2" will likewise be rocked clockwise, against the action of a spring 2I0 fastened to the arm I and to the rod I59. Upon such clockwise movement of the bail 20I', the finger 204 will be moved from beneath the pawl 209, thereby releasing the arm 205 and the pawl 200 for clockwise movement by the spring 200. Whether or not the arm 205 and the pawl 209 receive such clockwise move ment at this time is determined by the operativeness of the electro hammer iii. If the hammer is operative, the spring 202 will rock the hammer II! clockwise at the same time the bail 20I receives such movement. When this occurs, a surface 2 formed on the upper edge of the hammer I I I will coact with a finger 2I2 on the am 205 to rock the arm 205 slightly counterclockwise to prevent clockwise movement of the arm 200 by the spring 208, thereby maintaining the pawl 200 in its normal position above the path of travel of the finger 204 on the bail 20I. It will, therefore, be seen that, when the lobe I on the cam II4 clears the nose I99 on the lever I91, the latter. together with the bail 20I, will be given a rapid counter-clockwise movement by the spring 2I0, such movement of the lever I91 being limited by the rear arm thereof striking the block I62. During such counterclockwise movement of the bail 20I, the lower edge thereof will coact with the lug 203 to impart a like movement to the electro hammer II9 to cause the latter to take an impression from the type carriers I04.

If, on the other hand. the electro hammer H3 is inoperative at the time the bail 20I is rocked clockwise, the spring 209 will rock the arm 205 clockwise until the left end thereof strikes the rod I52, thus rocking the pawl 206 clockwise to position the free end thereof directly in the path of movement of the finger 204 to prevent counterclockwise movement of the bail 20L Therefore, when the lobe I95 clears the nose I95, the lever I91 and the ball 20I' will be retained in their retracted positions by the pawl 206, against the action of the spring 2I0, to render the electro hammer operating means inoperable when said hammer has been previously rendered inoperative.

During the second cycle of a total operation, the end of the pawl 208 is released from the finger 204 by the hammer II2 contacting the finger 2 I2 and rocking the arm 205 to tension the spring 201 so that, when the pressure between the finger 204 and the end of the pawl 206 is removed, the tensioned spring 201 will rock the pawl 208 away from the finger 204 to permit operation or the electro hammer II3.

Detail strip lower printing hammer operating mechanism A lower printing hammer 22I (Fig. 7) is provided for taking an impression from the type carriers I04 and printing the same on a detail strip. This hammer 22I is pivoted on the stud I24 and has a rearwardly extending arm 222. Also plvotally mounted on the stud I24 is an arm 222 having an integral arm 224 connected by a spring 225 to the hammer 22I'. The hammer 22I carries a stud 228, which is normally held by the spring 225 against another arm 221 integral with the arm 229. Pivoted on the stud I24 is an operating arm 228 secured to a bail 229 also pivoted on the stud I 24. The ball 229 underlies the arm 223.

Upon clockwise rotation of the shaft I42, a lobe 229,,on a cam 23! secured to said shaft, will contact and rock the arm 229, the bail 229, and the arm 223 counter-clockwise against the action of a spring 233 to hold the same against the ball 229.

Pivotally mounted on a stud 234 in the printer frame !9! is a latch 235, which normally engages a surface 238 on the arm 223. Also pivotally mounted on the stud 234 is a hook 231 resiliently connected to the latch 235 by a spring 238. A spring 299, connected to the hook 231 and to the am 224, normally urges the hook 231 counterclockwise and, through a stud 248 on the hook 231 coacting with the edge of the latch 235, tends to move said latch 235 counter-clockwise.

As the bail 229 and the arm 223 are rocked counter-clockwise, as described above,-the surface 239 is moved away from the latch 235, whereupon the spring 239 rocks the hook 291 and the latch 225 counter-clockwise, to engage the latter with another surface 24! on the arm 223. If the hammer 22! is inoperative at this time, the arm 223 will be retained in its retracted position, through the engagement of the latch 235 with the surface 24!, until such time as the hammer 22! is rendered operative. It will thus be seen that idle operation of this hammer operating means is prevented.

The printing hammer 22! is rendered operative only when printing totals, which necessitates a two-cycle operation of the machine. -When this occurs, the hammer 22! remains inoperative during the first cycle of said operation and is rendered operative during the second cycle of said operation. During the first cycle of a total operation, while the hammer 22! is inoperative, the operating means therefor is retained in its retracted position in the manner above described. However, when the cam 23! is again rotated clockwise during the second cycle-of said operation, the lobe 239 thereon will actuate the arm 228 and the bail 229 to impart a slight counterclockwise movement to the arm 223. However, before the arm 223 receives such slight counterclockwise movement, the printing hammer 22!, being rendered operative at this time, is rocked counter-clockwise by the spring 225, whereupon the arm 222 will rock the hook 231 clockwise. The spring 238 is strong enough to carry the latch 235 with the hook 231. Therefore, the slight counter-clockwise movement imparted to the arm 223, as mentioned above, is for the purpose of facilitating the disengagement of the latch 235 from the surface 24!, by the hook 231, under the action of the spring 239, to release the arm 223 for rapid clockwise movement by the spring 239. When this occurs, the arm 221, coacting with the stud 226, imparts the necessary clockwise movement to the hammer 22! to take an impression from the type carriers I94,

Selective means for controlling operativeness of printing hammers As is customary in machines of the type to which the present invention is applied, selective means is provided for conditioning the machine for single-cycle adding operations and two-cycle total or sub-total operations, which means also controls the operativeness of the printing hammers during such different kinds of operations.

This selective means includes the usual total control lever 25! (Fig. 10), which has several different positions of adjustment, such as its normal acid position, sub-total position, and total position. The lever 25! has a slot 252, into which projects a pin 253 on a lever 254 pivoted at 255. Also pivoted at 255 is an arm 256 having a stud 251, which is normally held in contact with the upper end 258 of the lever 254 by a spring 259. The lever 254 and the arm 258 together form a slot 299, into which projects a roller 26! carried by an arm 262 secured to a shaft 263 In Fig. 10, the total lever 25! is shown in its add"'position. Movement of the total lever upwardiy to take a sub-total. or downwardly to take a total, through the cam slot 252, the lever 254. and the arm 258, rocks the arm 282 and the shaft 293 in a'clockwise direction. Also secured to the shaft 263 is an arm 264 connected by a link 265 to a lever 266 pivoted at 261 to the side frame (not shown) of the machine. Connected to the lever 296 is a. pitman 298 slotted to surround the screw stud Hill. This pitman carries a roller 269 normally resting in an offset 219 of a cam race 21! in a disk 212. The pitman 266 also has two pins 213 projecting on either side of a flange 214 formed on a coupling slide 215, which is adapted to couple the cam disk 212 to the gear 99.

The above-mentioned clockwise movement of the shaft 263 by the total lever 25! will, through the connection shown in Fig. 10, move the pitman 2'68 toward theleft to move the coupling slide 215 to couple together the gear 99 and the disk 212 so that they will operate in unison in a manner fully illustrated and described in the United States Letters Patent No. 1,242,170, granted October 9, 1917, to Frederick L. Fuller.

Also, when the total lever 25! is moved from its adding position into a position to take either a total or a sub-total, an arm 29! (Fig. 2) fast on the shaft 293 moves a pitman 292 to the right. This pitman carries a roller 293 and, by its contact with an arm 294 fast on a printer control shaft 285, moves the latter clockwise to control mechanism for controlling the operativeness of the printing hammers, as will be more fully explained hereinafter.

After the parts have thus been manually moved into such positions, the gear 99 is given a complete rotation in a counter-clockwise direction. thus causing the drive shaft 19 to be given two complete clockwise rotations for such total or subtotal operation. As the disk 212 is now coupled to the gear 99, the cam race 21!, near the end of the first cycle of said operation, rocks the shaft 263 still farther clockwise to effect a further adjustment of the means for controlling the operativeness of the printing hammers, as will be described later.

It will be recalled that the cam arm 91 (Figs. 1 and 2) is adjusted during adding operations into a position determined by the keys 6!. This arm 91 cooperates with a roller 285 on an arm 261 loose upon the shaft 295. The arm 291 has an angular slot, into which projects a roller 288 carried by a link 289, which roller 299 also project's through a straight slot in an arm 299 fast on the shaft 285.

Depression of any of the four uppermost keys 9! (Fig. 2) causes the cam arm 91 to be set so that the roller 286 will coast with a lower edge 29! of said cam arm 91, as viewed in Fig. 2, and therefore cause no movement of the arms 281 and 299, nor of the shaft 285. Fig. 1 shows the cam arm 91 in the position to which it is adjusted under control Of the two lowermost keys 9!, as seen in said figure, which are the Grand total" and Nosale" keys. When the arm 91 is set in this position, a higher edge 292 thereof cooperates with the 13 roller 2" to rock the arm 2" and, through the roller 285, the arm and the shaft 205 clockv wise, which movement of the shaft 255 corresponds to the movement given to said shalt during the second cycle of a total or sub-total operation to render all of the printing hammers operative, as will be further explained hereinafter.

In the present machine, it is desirable to print both on the receipt and on the detail strip each time a "No-sale" operation is performed. It will be seen from the above that, when the "No-sale" key ii is depressed, the control normally exercised by the total lever 25i overthe operativeness oi the printing hammers during a single-cycle operation will be superseded by the control exer cised over said hammers by the cam arm ll under control or the No-sale" key. Since the Grand total" key N is depressed only when the total lever "I is positioned in its total position, said Grand total" key will not control means to supersede the control normally exercised by said lever over the operativeness oi the printing hammers.

The means bywhlch the total lever 25! and the "No-sale" key 8| control the operativeness of the printing hammers includes a hammer control lever 300 (Figs. 4, 6, and '7) pivoted on the outer one'oi the nested sleeves I55. This lever 300 has a flange "I adapted to cooperate with a stud 302 on an arm 303 (Fig. '1) secured to the lower printing hammer 22 I. A flange 304, formed on the upper end of the lever 200, has an extension 305, which is adapted to cooperate with a stud I05 (Fig. 4) projecting laterally from an arm secured to the item printing hammer III. The flange llll also cooperates with a stud 308 on an arm Ill! secured to the total printing hammer 2 (Fig. 6). The extension "5, which cooperates with the stud 306 on the arm 30'! o! the item hammer III, is shorter than the oppositely-extending flange 354, which cooperates with the stud 808 on the arm 309 oi the total hammer N2, the two'studs 306 and "I being spaced apart from each other and extending laterallytoward each other. The hammer control lever B extends into the space between the two studs "8 and 305 on the parallel arms 30! and 309 of the item hammer Iii and the total hammer H2.

When the total control lever "I is in its add position, for all operations except a No-sale" operation, the flange "I (Fig. 7) cooperates with the stud I02 on the lower hammer arm "I to prevent operation of the detail printing hammer 22!. Also the flange 3M cooperates with the stud 308 to prevent operation of the total hammer I [2, but the extension 355, being shorter than the flange 304, does not lie above the stud I", and consequently the item hammer III is free to operate during such adding operations.

The electro hammer H3 is also rendered inoperative by the hammer control lever Iilll in a manner now to be described. A disk I15 (Figs. 4 and 6), pinned to the lever I", is. provided with a projection III, which is normally positioned in the path of travel of a stud ll! carried by an arm III connected by a ball 9 to an arm 320 normally urged clockwise by a spring 32!. The arms 3 l I and 320 are pivotally mounted on a stud 322 carried by the printer frame III; The arm 320 has a notch adapted to coact with a stud 323 on the electro hammer H3. As long as the hammer control lever I00 is in the position shown in Fig. 6, the notch in the arm 320 engages the stud I23. thus rendering the electro hammer H2 inoperative.

It will thus be seen from the above that, during all adding operations except a No-sale operation, the flanges Ill and IM on the lever I" render the lower printing hammer HI and the total hammer H2 inoperative, while the proiection 5 on the disk I15 renders the electro hammer III inoperative. However, such means has no eilect on the item hammer III at this time.

The means for controlling the positioning of the hammer control lever 300 and the disk M5 is old and well known in the art and will therefore be only briefly degribed herein. The shaft 255 (Fig. '3) has secured thereto an arm 8, which carries a stud 35!, which projects between a pair of arms Ill and 352 joumaled on the shaft 255 and held against the stud 350 by a spring 855. A stud 354, carried by the forward arm of a lever 355 pivoted on the shaft 255, also projects between the pivoted arms 3M and I52.

When a total operation is to be performed, the total lever 25l is moved downwardly to its total position, which imparts a clockwise movement to the shaft 285. as previously described, as well as to the arm 149 secured thereon. Such clockwise movement of the arm 34! is transmitted by the stud 350 to the arm 35L thence through the spring 353 to the arm 352, which contacts the stud 354 to rock the lever 355 clockwise. A stud 355, carried by a rearwardly extending arm of the lever 355, is embraced by a notch 351 (Fig. 4) formed in the hammer control lever 355, whereby clockwise movement of the lever 355 is transmitted to the control lever 300 to rock the latter counter-clockwise. The counter-clockwise movement thus imparted to the lever 105, as well as to the disk 3I5 secured thereto, by the total control lever 25!, when the latter is moved from its add position to its total position, is insufllcient to move the flanges 3M and 354 out of cooperative relation with their respective studs 302 and 308 on the arms 303 and 309, respectively, thus releasing the hammers 22i and H2 for operation.

Also, the projection 316 on the disk M5, the latter being moved with the lever 300, has not been moved out of cooperative relationship with the stud in (Fig. 6) on the arm 3i8, thus, maintaining the arm 320 in engagement with the stud 321 on the electro hammer I 13. Therefore, the lower hammer Hi, the total hammer H2, and the electro hammer H3 will remain inoperative during the first cycle of said two-cycle total operation. However, the extension 305 on the flange 304, which normally occupies a position out of the path of movement of the stud 555 on the arm 301, is shifted by this counterclockwise movement of the lever 30!] into its effective position above the stud 805, thereby rendering the item hammer III also inoperative during the first cycle of said total-taking operation.

Near the end of the flrst cycle of such totaltaking operation, the shaft 285 is given an additional clockwise movement, which, through the mechanism described above, imparts an additional counter-clockwise movement to the hammer control lever 300 and to the disk 3|5, to render all 01' the printing hammers operative during the second cycle of said operation. This is accomplished by said additional counterclockwise move ment of the shaft 285, which isimparted to the lever 300 and to the disk 3N and is sumcient to carry the flanges IM and 304, the extension 300, and the projection IIO out of cooperative relationship with the studs I02, 909, 306, and II], respectively, thereby rendering the lower hammer Hi, the total hammer N2, the item hammer Hi, and the electro hammer ll: operative.

During a single-cycle No-sale" operation, the cam arm 91, which is adjusted under control of the No-sale key 9|, cooperates with the roller 208 to cause the shaft 206 to be rocked clockwise, as described previously. The clockwise movement which the shaft 285 receives under control of the No-sale key il is sufficient to render all of the printing hammers 22I, Ill, H2, and H3 operative in the same manner as just described for a totaltaking operation.

During a sub-total operation, all of the printing hammers Ill, H2, H9, and I are inoperative during the first cycle of said sub-total operation, while during the second cycle only the item hammer III is operative to print the amount of the sub-total on the receipt. The manner in which all of said hammers are rendered inoperative during the first cycle of such operation is the same as that employed during the first cycle of a total operation, as described previously; in fact, the hammer control lever 300 and the disk 3l5 receive the same adjustments during subtotal operations as they do during total operations. However, means is provided for maintaining the total hammer H 2, the electro hammer H3, and the lower hammer 22l inoperative during the second cycle of said sub-total operation, after the control lever 300 and the disk 3I5 have been rocked sufficiently counter-clockwise to normally render said hammers operative. This means will now be described.

When the total control lever 25! is moved from add position to sub-total position, as viewed in Fig. 10, it will, through a link 314, rock an arm 315 counter-clockwise. Since the arm 915 is secured to the shaft 95, it will transmit such counter-clockwise movement to said shaft aswell as to a gear segment 316 secured to the shaft. The segment 319 meshes with teeth 311 of a segment lever 310 freely mounted on a rod 319 supported by the machine side frames 96 and the printer frame MI. The upper end of the segment lever 318 has teeth 380 meshing with the teeth of a partial gear 38! freely mounted on a rod 992 supported in the machine side frames. Secured to the gear 384 is a cam plate 393 having a high spot 384 formed on the periphery thereof.

It will thus be seen from the above that the counter-clockwise movement given to the segment I" will, through the segment lever 310, rock the gear Ill and the plate 303 counterclockwise.

Freely mounted on a shaft 305 journaled in the machine side frames is an arm 3" carrying a roller 301. A spring 300, secured to an extension 309 of the arm 306, constantly urges said arm counter-clockwise to maintain the roller 38'! in cooperative relationship with the periphery of the cam plate 393. The extension 389 has pivoted thereto one end of a link 390, the other end of said link being slotted to engage a stud 39! on an arm 992 of a yoke 393 (Fig. 9) loosely mounted on a rod 394 secured in the left side frame 06 and the printer frame l0l. Another arm "I of the yoke 393 carries a stud 402, which is embraced by the bifurcated portion of an arm 409 pinned to a shaft 404 iournaled in the printer 16 frame I 0| and the auxiliary frame I ll. Also pinned to the shaft 404 is a pair of arms 405 and 400, which are adapted to be moved into the path of movement of studs 40! and 323 on the total hammer H2 and the electro hammer H3, respectively.

It will be seen from the foregoing that, when the total control lever 25l is moved to its subtotal position, the cam plate 383 will be moved counter-clockwise, causing the high spot 304 thereon to coact with the roller 381 to rock the arm 30G clockwise against the action of the spring 388. As long as the total control lever I remains in the sub-total position, the cam plate 383 will be positioned so that the high spot "4 will remain in cooperative relationship with the roller 391 to maintainthe arm 386 in its moved position. A spring 408 constantly tends to rock the yoke 393 clockwise, but is normally prevented from doing so by the arm 386, through the extension 389 and the link 390. When the arm 389 is rocked clockwise, as described above, it will, through the link 390, rock the arm 392, the yoke 393, and the arm 40! counter-clockwise. When this occurs, the arm 40l, through the stud 402, the arm 403, and the shaft 404, will rock'the pair of arms 405 and'406 clockwise (Figs. 6 and 10) to position the lower ends of said arms directly above and in the path of travel of the studs 401 and 323 on the total hammer I I2 and the electro hammer H3, respectively, to render the same inoperative during the entire sub-total operation.

Means is provided for maintaining the arms 405 and 406 in their effective positions during both cycles of said sub-total operation, and they are not returned to their normal ineffective positions until shortly after the beginning of the next adding or total-taking operation. The means for accomplishing this result will now be described.

Associated with the stud 402 on the arm 40! is a lever 409 (Fig. 10) having one end thereof formed in the shape of a hook 4|0, which normally bears against the under side of the stud 402, under the influence of a spring 4. When the arm "I is rocked counter-clockwise, to render the arms 405 and 406 effective, the lever 409 will be rocked clockwise by the spring 4 to engage the hook 0 thereof with the stud 402, to maintain said arms in their effective positions until the next adding or total-taking operation of the machine. The lever 409, which is pivotally mounted on a stud M2 in the printer frame II", is bifurcated at its other end to embrace a stud 3 of a lever 4l4 freely mounted on a stud 4|! carried by the printer frame IN. The lower arm of the lever 4 lies in the path of travel of one arm of a bell crank 4l6 freely mounted on a stud 4|! in the printer frame IN. The other arm of the bell crank 4| 6 carries a stud 4l8 embraced by a notch 4 I 9 formed in the under side of a slide 420. The slide 420 is pivoted at its right-hand end to a lever 42f and is-guided at its opposite end by a pin 422 projecting from the printer frame I0! through a slot 423 in said slide. The lever "I is pivoted on a stud 424 supported by the left side frame 06 of the machine and the printer frame NH, and carries two rollers 425 and 426, which coact with cams 421 and 428, respectively, secured to the printer drive shaft I42.

During each cycle of operation of the machine, the cams 421 and 428 oscillate the lever 42l to rock the bell crank 6 first counter-clockwise and then clockwise to its normal position. The bell crank 6 will, upon such counter-clockwise movement, coact with the lever 4 to rock the I enective positions away from the studs 401 and 323 of the total hammer I i2 and the electro hammer I13, respectively.

The means for maintaining the lower printing hammer 22l inoperative during the second cycle of the sub-total operation, after the lever 300 and the disk 315 have been positioned to render said hammer operative, is the same as that illustrated in Figs. 9 and 10, as well as fully described, in theGruver patent hereinbefore referred to and reference may be made to such patent for a full understanding of this means.

After the lower printing hammer 221 is operated to make an impression, the stud 223 (Fig. 7), under the influence of the spring 225, rests on the arm 221 of the operating arm 223. In order to prevent the hammer Hi from being positioned so that the stud 302 will be in the path of movement of the flange 301 when the latter is to be rocked beneath the stud to render the hammer inoperative, means is provided for slightly raising the hammer. This means includes a hook-shaped arm 33! (Fig. 8), which normally coacts with a stud 332 on the rearend of the hammer 221 to maintain the latter in a position so that the stud 332 will be above and out of the path of movement of the flange 3M on the control lever 3110. The arm 33! is connected by a bail 333 to another arm 334, such bail and arm being pivotally mounted on the stud 234. The arm 334 carries a stud 335, which projects through a slot 336 in a pitman 331 slidably mounted on the printer drive shaft I42. A pair of cams 33B and 339 fast on the shaft I42 cooperate with a pair of rollers 340 and 341, respectively, on the pitman 331 and normally hold the pitman in its extreme left-hand position, as viewed in Fig. 8. During each cycle of operation of the machine, just before the lobe 230 coacts with the am 228 to eifect the retraction of the hammer-operating arm 223, the cams 333 and339 cooperate with the rollers 340 and 3 to shift the pitman 331 toward the right. The pitman 331, through the slot 336 and the stud 335, rocks the arm 334, the bail 333, and the arm 33l clockwise, whereupon the spring 225 lowers the hammer 22| until the stud 226 rests on the arm 221. After the hammer 22I has had time to 0perate, and near the end of said cycle of operation, the cams 338 and 339 move the pitman 331 toward the left, which rocks the arms 334 and 331 counter-clockwise. When this occurs, the arm 33] will coact with the stud 332 to move the hammer 22l slightly clockwise to raise the stud 302 sufiiciently to permit the flange 301 to be positioned thereunder, as heretofore described.

Control of upper hammers by check control key The machine is provided with the regular check control key, whereby the upper hammers may all be rendered ineffective when a check is not desired. In Fig. 1 is shown a check control key 443 pivoted at 441 to the printer frame llll, shown only in Fig. 9. This key controls the hammers Ill, H2, and H3 in the manner fully shown and described in. United States Letters Patent to Samuel Brand, No. 1,812,194, dated June 30, 1931, and such controls need not be repeated here.

However, on the operation following one in which the key 440 has been depressed, it is nec essary to control the total hammer H2 and the electro hammer I 13 to prevent them from operating during said following operation. Therefore, the link 442, which is pivoted to the key 440, has an arm 443 with a flange444 positioned to the rear of the arm 405. Upon depression of the key 440, the flange 444 rocks the arm 435 above the stud 431 of the total hammer H2 and simultaneously rocks the arm 406 above the stud. 323 of the electro'hanimer H3, and said arms 4" and 406 are so held by the hook 4I|I oi lever 433, as previously described, until near the end 01' an operation following an operationin which the key 440 has been depressed, in order to prevent the hammers H2 and 3 from operating during an item-entering operation.

The key 440 is held depressed by a pawl 445 engagin a notch 446 of an arm-441, to which' the link 442 is pivoted, and is held depressed until a total of the items is taken, whereupon it is released by an arm 443, secured to the usual shaft 449, which arm 448, by its counter-clockwise movement, releases the pawl 443 from the arm 441 in the manner and by means shown and described in said Brand patent.

As the functions and operations 01 the present machine were quite fully described at the beginning of this specification, and as the complete operations of all of the mechanisms for performin these functions have been described throughout the specification, it is not thought necessary to give a description of the operation of the machine again.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form or embodiment herein disclosed, for it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow.

What is ciaimed'is:

1. In a machine of the class described, the combination of a printing hammer; a retracting spring for said hammer; means, engaging the hammer to normally maintain the hammer in an unretracted position against the action of said spring; a spring, stronger than the retracting spring, operatively connected to said means to normally maintain said means in position to maintain the hammer in unretracted position; a cam to actuate said means, and tension said stronger spring, to release the hammer to the action of the retracting spring. said cam formed to thereafter release said means to the action of the stronger spring to operate the hammer for printing; a pawl normally urged toward a position wherein the pawl engages said means to hold the means in operated position a spring-actuated arm operatively connected to said pawl, said hammer engageable with the arm when the hammer is retracted to hold the pawl out of said holding position; and means selectively positionable into one or. another position; which means, when in one position, engages the hammer to prevent retraction of the hammer by the retracting spring, thereby permitting the pawl to move into said holding positionand prevent operation of said hammer, said last-named means, when in said another position, releasing the hammer to the action of its retracting spring and upon being retracted engages said arm to move said pawl out or holding position to release said first-named means to the action of said stronger spring to operate the hammer for printing.

2. In a machine of the class described, the combination of a printing hammer; an operating arm for said hammer; a spring connected to the hammer and tensloned to draw the hammer into engagement with the operating arm; cam means to retract the operating arm in one direction; a spring to actuate the operating arm in the reverse direction to move the hammer in printing direction; means engageable with the hammer to maintain the hammer in normal position and movable out of engagement with the hammer to release the hammer to the action of the firstnamed spring; means located in the path of travel or the hammer; and a spring to normally urge the last-named means to engage the operating arm when the operating arm is moved to the retracted position by the cam means, to maintain the operating arm in retracted position when the hammer is maintained in normal position by the means to engage the hammer, and movable out of the path of movement of the retracted operating arm by the hammer when the hammer is thereafter moved by said first-named spring upon being released by the means to engage the hammer.

3. In a machine of the class described, the combination of a printing hammer; an operat-. ing device for said hammer; a resilient means to draw the hammer into engagement with the device; cam means to retract said device preparatory to the device operating said hammer for printing and thereafter to release said device; a spring to operate the device in printing direction after the cam has retracted and released said device; an element normally urged into the return path of movement of the device to retain said device in its retracted position; means movable into engagement with said hammer to maintain the hammer against movement by said resilient means; and means resiliently connected to said element and extending into the path of movement of the hammer so as to be operable by said hammer when the latter is drawn into engagement with the device after the device is retracted by said cam, to withdraw said element from the return path of movement of said device to thereby cause the spring to operate the device and through the device move the printing hammer in printing direction.

4. In a machine of the class described, the combination of a printing hammer having a normal position and a retracted position; an operating device for said hammer; a spring for moving said device and thereby moving said printing hammer in printing direction; a resilient means to draw the hammer into engagement with the device; means for retracting said device preparatory to the device being operated by said spring and thereby operating said hammer to print; a

. its retracted position, and the other member being located in the path of movement of the hammer so as to be actuated by said hammer when the latter is released by said settable means, to withdraw said first-mentioned member from engagement with said device to release the device to the action of said spring.

5. In a machine of the class described, the

combination of a printing hammer; an operating device for said hammer; a spring for actuating said device; resilient means to draw the hammer into engagement with said device; settable means engageable with the hammer for maintaining said hammer against the action of the resilient means, said settable means movable out of engagement with the hammer for releasing said hammer to the action of the resilient means; means for retracting said device preparatory to the device being operated by said spring for operating said hammer to print; means normally effective to move into engagement with said device when said device is in its retracted position to maintain said device in said retracted position; and means operated by the hammer when the hammer is released to the action of the resilient means for withdrawing the normally eifective means, to thereby free the retracted device to be operated by said spring and to thereby operate the hammer to print.

ELMER C. CARTER. CHARLES G. DUDIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,628,336 Shipley May 10, 1927 1,613,129 Robertson Jan. 4, 1927 1,730,052 Berger Oct. 1, 1929 1,747,743 Sundstrand Feb. 18, 1930 1,812,194 Brand June 30, 1931 1,817,883 Shipley Aug. 4, 1931 1,865,147 Shipley June 28, 1932 1,898,048 Goldberg Feb. 21, 1933 1,963,733 Brand June 19, 1934 2,139,719 Brietling et ai Dec. 13, 1938 2,209,771 Griers et al. July 30, 1940 2,229,731 Fort Jan. 28, 1941 FOREIGN PATENTS Number Country Date 699,806 France July 12, 1930 852,846 France Nov. 9, 1939

Images