US861431A - Sorts-machine for making type. - Google Patents

Description

No. 861,431. PATENTBD JULY 30', 1907. F. H. BROWN, J. HANRAHAN & G. A. BOYDEN.

SORTS MACHINE FOR MAKING TYPE.

APPLIOATION FILED APR.6,1905.

5 SHEETS-SHEET l.

@ as.v

PATENTED JULY so, 1907.

5 SHEETS-SHEET 2.

F. H. BROWN, J. E. HANRAHAN & G. A. BOYDEN. SORTS MACHINE FOR MAKING TYPE.

APPLIOATION FILED APR.6,1905.

wwnwwo @Z MM PATENTBD JULY 30,1907. F. H. BROWN; J. E. HANRAHAN &-G. A. BUYDEN.

- SORTS MAGHINB FOR MAKING TYPE."

APPLICATION FILED A311. 6, 19'05.

5 SHEETS-$1111 3.

:TafirzE/Edrarahm v a? efl Bg dera, v

No. 861,431. PATENTED JULY 30, 1907. F. H. BROWN, I. E. HANRAHAN & G. A. BOYDEN. SORTS MACHINE IOR MAKING TYPE.

APPLICATION FILED APE.6,1905.

6 SHEETS-SHEET 4.

j ,FRANKIVAHAOWARTH BROWN AND JOHN EDWARDHANRAHAN ALBERTVBOYDEN, OF MOUNTWASHINGTON,

1 1 UNITED STATES PATENT OFFICE.

MARYLAND, ASSIGNORS TO NATIONAL COMBOSITYPE COMPANY, OFB ALTIMORE, MARYLAND, A CORPORATION OF DELAWARE.

.iszrwa il.

"Mount Washington, in the county of Baltimore and State of Maryland, have invented certain newv and l 'useful'Impr'ovements in Sorts-Machines for Making T ype and we do'hereby declare the following to be a full, clear, and exact description of the invention,

such as will enable others skilled in the art to which it appertains to makeand use-the same.

This invention relates to the art of type making in which are produced individual type characters, such as body and display letters, borders, ornaments, spaces and quads, that are used in ordinary type composition,

" the same being designed particularly for use in conjunction with the sorts machine for casting type covered in our pending application for patent filed .lanu

' ary 1903, Serial No."140 ,152.

The invention has for its object the production of simple'and oflicient means for feeding molten metal *to the molds of a type casting machine.

A further object is to provide means for varying the feed of the molten metal to conform to the size of the east.

A further object is to provide means for applying a fixed, uniform, and unvarying pressure to the molten metal in filling molds of various sizes, whereby the type will be of uniform density. I

A further object is to provide means for relieving the mechanism of abnormal strains and jars in casting type bodies' of the smaller sizes.

I A further object is to provide means for automatically cutting off the supply of molten metal just as soon as the mold is filled irrespective of the size of the cast.

A further object is to provide valve operating mechanism, and means for automatically varying the time in which the valves are opened and closed to conform I to different sizes of casts. g

A further object is to provide means for actuating the metal supply mechanism, said actuating mechanismbeing arranged to automatically adjust itself to conform 'to the various sizes ofthe typo cast, and to compensate for any changes due to expansion, contraction, or wear.

The invention will be hereinafter fully set forth and particularly pointed out in the claims, and the inventive ideas involved are illustrated in the accompanying-drawings, which include modifications of the machine and also of certain parts, but it is to be distinctly understood that the said drawings are intended for illustration only. and notas defining the limits or scope of the invention.

Specification of Letters Patent.

Application filed April 6,1905. Serial No. 254,199.

' ,SORTS-MAGHINE FOR MAKING TYPE;

Patented July so, 1907.

weight raised. Fig. 6 is an end elevation, partly in section of a modified form of the machine. Fig. 7 is a .vertic'al sectional view of theweight parts, cams and trips taken at right angles to Fig.'6. Fig. 3 is a sectional view of a modified latch mechanism. Fig. 9. is a sectional view of a modified overflowfor pump mechanism and Fig. 10 is a sectional view of a modified'molten metal valve mechanism. l I

The power applying mechanism (Figs. 1,- 2 3) comprises a drive pulley 2 that revolves loosely on the main shaft 3, and is made fast thereto when desired, by suitable clutch mechanism that instantly disengages or engages the two, by moving the-clutch wheel 4 in orout, thereby affording a quick and convenient ar- OF BALTIMORE, AND GEORLGE' rangement for this purpose which is essential in order 4 'to start the machine atits maximum speed and instantly release the power in case of accident to the parts. The'hand wheel 5 is rigidly secured to the shaft 3 and is used to operate the machine by hand, to test the position of the parts before thepowe'r is applied. The shaft 3 rotates in the bearing 6 and passes into the hollow body of the machine, where it is provided with a crank wheel 8, from which reciprocating motion is transmitted to the ram 9 by the connecting rod 10 and suitable connections. are combined the'several sub combinations which re- .ceive their respective movements therefrom.

The mold yoke 20, the yoke 37 supporting the molten-metal receptacle, the stationary moldpart 172 and the movablemold part 170 are the same as described in our pending application heretofore referred to, the movable mold part and its locking mechanism being operated by the ram 9, and further description thereof is unnecessary.

With this mechanism The actuating mechanism comprises one or more than one of the mechanisms that impart movement or action, to the various elements that perform the required functions, and is characterized by having partsso constructed and combined as to automatically vary or modify their functions to meet the requirements of the changed ditions established in the mold parts in casting var bus sizes of type. For example, the pump is required to be operated by a fixed force, and eject more or'less molten metal in accordance with the size of type cast, and the pressure exerted on the molten metal by the fixed'force must be retained for casting large type, but reduced for casting smaller type, other-- from the pump well to the metal receptacle an excess of metal'when small type are cast, but which excess wise the different size type will lack uniform density and the sudden stopping of the large flow and force of metal necessary to cast large type would create a destructive force on the parts involved it retained to cast h reguired in casting diffdrent sizes of type, by having the pump well provided with a molten metal overflow passage whichis fully active in dischargingvback discharge is automatically'modified' by diminution as more and more molten metal is required for type of increased size,- until said excess discharge wholly ceases when the larger sizes of type are cast. This explains what is meant by the expression -automatically modified, which expression is more or less applicable to the other sub-combinations of the actuating mechanism, all of which are fully described under their respective captions in this specification, and which will nowbe described in their proper order.

{The molten metal receptacle 31 is mounted in the yoke' 37and the same is provided with a pump well 5451 The eduction valve 51 is formed on the stem 50 and controls the port through which the metal is ejected from the well'54 to the mold cavity, and on said stem is also formed. the induction valve 52 which controls the port through which part of the molten metal passes, by way of the duct 53, from the metal receptacle to said pump well. The pump plunger 73'is provided with a second induction valve- 74 that permits the metal to also flow-to the well 54 in addition to the valve 52, and

thereby affords a second admission of the metal to insure the rapid and complete filling of the same, after every stroke of the pump. The valve 74 remains open ,until the pump plunger 73 drops, when it is instantly closed, and any back flow to the'metal receptacle 31 is prevented. The vertical valve lever 55 is supported at its upper end by a pin 56 that rests in horizontal slots formed in each wing oithe arm 57. The compression spring 58 forces the top end of the lever 55 outward toward the lug.60 on the pump lever (31, said lug serving to move the vertical valve lever 55 to close the eduction valve 51, and is'located in relation to said lever 55 soar! to multiply the movement of the end of said lever connected to the valve stem 50, by which a greater movement is imparted to the lower end of said lever from the lesser movement of the lug 69, thereby forced towards the nipple and the valve 51 held against its seat.) At the same time the spring 58 maintains a yielding 'condition'which automatically compensates for the variations in sizes of the parts they are continually undergoing due to errpansion, contraction and wear. .The compression spring 62 forces the lower end of lever55 outward, when the lug 6D and lever 61 drops-,- and with it the valve stem 50, which opens the educ-' tion'valve 51 to permit the ejection of the metal from the receptacle 31 into the mold cavity, and at the same time close the induction valve 52, to prevent the return of any metal therethrough, from the well 54 to the receptacle 31. The valve lever 55 is provided with a roller 61 to reduce the l'rictionbctwocn said lever and the lug 60, when the latter forces the former back, to seat the valve 51 by the upward motion of the pump lever 61.

The pump mechanism comprises the pump lever 61 pivoted to the arm 48 and attached by the clevis 71 to the rod and extends down through the bearing 72 tothe metal well 54, where it is secured to the pump plunger 73. The pump plunger 73 fits the bore of the well very accurately to insure a comparatively tight joint between the two, to prevent the metal in the well from escaping through the .joint when the pumpacts. Located a little below pump plunger 7 3 in the wall that forms thewell 54, is a small passage 75, that leads from the well into the metal receptacle 31 and which forms ametal escapefrom the well, that modifies the flow and force of the metal injected into the mold by which a uniform density is maintained in large and small type, and prevents the sudden stopping of the flow of the molten metal and the movement of the pump plunger 73 in casting small type to relieve the different parts of the metal mechanism from the severe strain they would be subject to if there was no outlet for the metal when casting small type with the high force required for large type. Without the overflow in casting small type the mold is filled by a slight movement of the pump plunger and the movement of the molten metal-instantly stops, producing small type of-a great density and causing a shock or jar to all the partsdnvolved, similar in principle to that of the hydraulic ram. When casting large type a comparatively larger amount of metal and greater force is required than in casting small type, hence the need of such an overflow is not necessary, in fact, detrimental, and the passage 75 is then cutoff by the pump plunger 73 passing over it in discharging the larger amount of metal, thereby preventing the overflow; consequently the conditions arising in the pump actions, varying from minimum to the maximum. in casting large and small type, where a fiXed pressureis used for both, are herein compe'nsated for by automatically modifying the functions of the pump mechanism. I

The pump and metal valve operating mechanism comprises a weight 80, sufiicieutlyheavy to produce the required pressure on the molten type metal toper- 'iectly cast the maximum size-type. The weight 80 is lifted by the movement of the shaft 81 attached to-the with a hardened steel-tip, that engages with the dog 85,

pivoted to the weight 80 in such manner that when the weight 80 is lifted to the desired height andthen,

when the lever tip passes from under the dog 85', the 'weight will be free and instantly drop, exerting its full force on the pump lever 61. The do gj85 rests against apro'ection 86 on the weight that preventsit fromswing toward the lever 83-,b1'rt ireato swing in the opposite direction, in order that when said lever makes its return movement, which is produced the twisted spring 87, the dog ismovedback thereby to permit the short end of the lever 83 travels through its arc, the

lease from the shank 91; and which is governed bythe A spiral spring 100 isdocated between the shank91 and i the latter is lifted to its maximum Height the lug 89,

pump parts, and restores them to their normal or up the keeper 88, inorder to permit theweight to drop fiat spring 9'57atits upper end is secured-to the shank 91 andgitsire'e :endabears against the, latch 90 to cause the liig':89-";the1eon'2 to -engage with the keeper 88 when thelwe'ight80 is raised to permit the same. 'lheshank I 91 has a vertical reciprocating movement in'the weightl pin 96 secured .to, the weight, and carries a clevis 97 I ing position and to release the' pump lever when it and sition shown in Figs. 3 and 4 they occupy their normal 73. when the weight parts are dropping the lower end 'same, and then by gravity drops back into its place and assumes the position to reengage the short end of the lever 83 to again lift and drop the weight80, To the weight issecured a keeper:88 which engageswit the lug 89 on the latch90 when'the WeightrSQ is raise The latch 90 isjpivoted to theshank 9lland forms the link that connects theshank and theweight 80, when. the lug 89 engagesthe lieepenandit isprovkledwitlra finger, 92 that projects upwardand is in contact ,with. a horizontal eccentric on the revolving collar 93 insuch manner that when the latter. is turned by the handle 94, the finger is forcedoutward; by the eccentric and the lug 89 on the latch 90 prevented from engaging without moving the'fshank or actuating the, pump; mechanism, wlien not desired, whilethe machine is in, motion. The end of the latch below the lug 89 has an incline 102 by which the, time of disengagement between the keeper 88 and the latch 90 is varied-in accordance to the distance the weight drops before re-'- size .of the: type cast as hereinafter explained. The

80,"with the stroke'limited by the slot therein and the attached-rigidly thereto. The clevis 97 is cutaway to receive the pump lever 61 when placed inthe operatthe .metal receptacle mechanism is moved to one side the keeper-88xand lifts saidshank and the adjuncts. attached thereto/when the latch 90 is released from the keeper 88 as the weightdrops. 1 1 When the above described clevis parts are in the opor up position, (which-they maintain'when'and whilelthe weightis'being lifted) and the weight 80 occupies its down position. When the shaft 81 moves forward the lever 83 moves therewith and its shortend move upward and having engaged with the under side of t e dog lifts the weight 80,- and when on the latch 90, engageswith the keeper 88 by the action of the spring 95, which forces it into that position. In the mean time the short end of the lever, in lifting the weight 80, describes an arc and passes from under the dog 85, and thereby drops the weight-80, andthe latch 90, shank 91, clevis 97, and pump leyer 61, are pulled down with the weight a'ndthe full force thereof instantly exerted on the molten metal in the well 54, through the pump lever 61, thetrod 72, and the plunger of the latch. passes'into a slot 98 in the shaft 81 provided with a hardened steel dog 99, which latter en-' counters the incline on the lower end of the latch,, as the shaft moves forward which releases the lug89, from the keeper 88, allows the spring 100 to actiand thereby lift the latch, shank, clevis, pump lever and position, also instantly actuating the metal valve 51 to cut off the metal at the proper temperature and places other cast, while the weight 80 is still moving downward,

at its full velocity, which; is effectually cushionedto grelieve tl1e, 8 0 pound.blqW o f the falling weight by suit; able dash-potmechanism 101 arranged'at the oqttqmrof v theweigh t 80. i The time of'the weight release, -i s gov,-l

erned bythe size ofthetypecast, as when small typef, 1 a ec trth vp p P r-7 3 d eig i mhe c 1 intervening connectingparts'traverse 'buta small pore A eli.

tion ofrt heir stroke as a comparatively smallquantity ,75 of metal is ejected fromthe' well54., Thispartialtrav- .erse, however, is very rapid throughout its entire range,

whatever it may be, and continues sountilthe moldis; filled, then by means of the overflow through passage 75, the discharge from the well 54' stillcontinuesbut contact with the dog 9.9 which is moving toward the, latch,.,thereby releasing it from the keeper,88 sooner than would occur if the latch droppeda, greater dis:

tance, as in casting large type. Consequently, in casting smalltype the latch 90 drops but ashort distance and thereby exposesthe wide-part 0f the inclinejo the;

dog 99, thus quickening the release; and when casting large type the latch 90 drops its'ful'l distance'andlenposes the narrow part .of the incline to the movement of the dog 99, and thus delays the release. Therefore, the

smaller the cast the quickerthe'pump parts are released from the falling weight andthe larger-the type the slower-these parts vare released, ,andlin all-intermediate sizes the release is in accordance to the quan-". tity of metal required by thesize'of the type castI-j These changes in the pumpactions and pump accessories-are automaticallymodifiedby. the conditions Les-x tablished by the differentsized casts, .fromthe mini: 1

mum to thg maximum, and are of the .greatestimpon.

tance in a machine of this kind-1 1 Furthermore; in

these several movements there resides a unison of ac-. tion which varies in point of time with the size of the type cast, so as'to quickly refill the well 54 Withthe amountof metal displaced; actuatethe several vvalves 80 very slowly, ,which practically keeps the incline 102 of latch 90 comparatively elevated in reference-to the. contact point of the dog99 (dotted lines, Fig. 5) a,n d in this position the greater width of the incline comesin to shut and open themolten metal ports at. the right instant to conform to the changed conditions of the different sized type; and cut off the type-jet from the metal supply at the proper temperature'to insure the clearance of the gate in'ejecting it'from the mold and the nipple port-from being clogged with chilled metalr These several actions: the opening of the eduction valve 5]; the closing of the induction valves 52 and 74; v

the drop of the plunger 73; the passage 75, remaining opened or closed the proper time to meet the changing requirements; the trip or release of the latch 90 and the reverse action of all these operations, are effected in the fraction of a second and all automatically varied or modified to fill the changed conditions required in casting various size type, without skilled attention or manipulation. I

By the use of a. weight to create the pressure to force the metal into the mold parts, 'apositive and uniform pressure is always retained on the pump plunger, but the pressure in the pump well 54 is varied by the action of the passage 75, consequently the variable actions are 'au tomatically madeand as the weight is not susceptible Y well 54.

and clamped into position, as described in our pending application hereinbefore referred to. At this high posit-ion of theweight 80 and point of time in the operation', lug 89 on latch 90 engages the keeper 88 of the weight, and as the shaft 81 continues this movement the short end of the lever 83 is'released from the dog 85,. allowing the weight to drop, and thus operating the pump parts and the metal valve mechanism, and ex erting the full force of the weight on the metal in the the first portion of the weights downward move ment'the valve stem 50 is-instantly moved back, the

eduction valve 51 opened and the induction valve 52 closed, by the lower end of the lever 55 moving back under the action oithe spring 62, when the lug 60 drops away from the roller 61. The pump lever 61, con-' tinuing-its movement, after the lug 60 leaves the roller 64, engages with the lower jaw of the clevis 71-, and by means of the rod 70, forces the pump plunger 73 downward against the metal in the well 54, and the induction valve'74, closing at the first portion of the plungers movement, the metal confinedin the well 54 is i driven into the mold through the passage 53 and the jet orifice and the type is cast. I

The'moveme'nt of shaft 81 continuing while weight 80 isdropping, dog 99 engages theincline 102 on the latch 90, (dotted lines Fig. 5) and disengages the lug 89 from keeper 88, which releases latch 90 from weight 80, and' the pump lever 61 and the pump parts are instantly forced to'their normal or up position by the i I spring 100: In this up movement of pump lever 61,

pump plunger 73 is drawn up and the induction'valve 74 opened, admitting metal to-the well' through its port; valve 51 seated, metal cut off from the jet at the right temperature and induction valve 52 opened, to-

permit the molten metal to fully equalize in the receptacle 31 and well 54, ready forthe following cast.

In Figs. 6, 7 and 8 I have illustrated a modification of the weight mechanism, and in Figs. 9 and 10 I have also illustrated modifications of the pump and metal valve mechanisms. The principles of invention, or

the inventive ideas involved in these modifications, are the same as those involved in the preferred forms,

although the applied mechanics are somewhat different.

The variousparts of the structure of the modifications are designated by the same numerals as are used for. designating the parts performing the same functions in the preferred form of the structure heretofore described, but in the modifications such numerals have w an exponent.

The power mechanism consists of a pulley2, shaft ,7 '3, hand wheel 5' 'and power clutch mechanism operated by the wheel 4*.

' type. .a

The cam 83 (Figs. 6 and 7),lifts the weight by v coming in contact with roller 85, attached to the weight, and drops the same, by passing from under the roller when the weight is raised to its maximum height to permit the latch to engage the keeper-88, when 7 0 the mold parts are in position to receive the cast. The cam 99' is secured to the shaft 3*, adjacent to the cam I 83 and in such relatioth theretojhat when the cam 83" releases'the weight 80 and the Patter-is dmpping, the lower end of the latch 90 encounters the hook on the 5 cam 99 as it rotates, and the thereby'released from the keeper 88 and the pump mechanism disengaged from the weight. The-latch 90: and adj acent parts thereto, and'modeof operation thereof-,L qliown in Fig. 7, are substantiallythe. same iitboth'the fifit 80 described and the modified structures, th latchin the" latterstructure being released by the revolving cam 99 instead of the reciprocating dog 99.. .r 1' v As shown in Fig. 8, latch QO -is modified to disen-'. gage from the weight 80 without depending on a moving cam or dog actuated by the machine. 1n this ad'- ditional modification the latch 90 is provided with an incline 89 that engages with a counter incline on the plate 88 secured to the weight-'80 and held 'inifrictional'contact with the plate 88 by a spud and 90 The spring 95 is of sufficient power to' creates. frictional resistance between the inclines, equivalent tothe pressure tobe applied to the molten metal to cast the type, and when the weight 80 isdropped' the force thereof is applied to the pump paa-ts up to the frictional resistance of the incline created .by I spring'95, the inclines then'slide one'on the other, and release the latchfrom the weight. 8 The latch and pump-parts-are moved to their up position .by the spring 109", and the weight drops its full stroke. When,

the weight is raised the upper side of the plate88 engages and forces back the latch. 90? to allow theincline. thereon to pass over/the-incline on the lower side of the plate and rengage the in'cline'89 to again act.

By this modification the efiect is to release the weight automatically from the pump parts'assoon as the resistance of the metal in the mold and well has reached apredetermined pressure, and iti'equires no care or g adjustment in casting different'size type.

As shown in Fig. 9, the overflowor discharge pas-.110 sage 75! modified by being discharged into anadditional well 301, provided ,with a plunger 1302, held' down by a spring 303, and which modification serves the'same purposeas set forth in the structure before 4 described.

As shown in Fig. 10, the means to actuate'metal valve parts are modifiedby having the valve stemfifl) actuated, to open theeduction valve, '51, by the force of the metal, when the pump acts, comingagainst a pistonBO i attached to the stem 50. The metal forces the piston back unseating the valve 51? and when the pump pressure is relieved from the molten metal thepiston' is'forced forward to reseat thevalve 51Iand permit the eduction valve port 52" to be opened by i v the spring 305 acting'on the lever 306, which latter is pivoted to the receptacle 31. By modification 1 the valve are actuated independently of any mechanical movement of the machineand requireno changes or manual adjustment tojcast the varioussize this machine can be greatly altered, va' ied',or other .'-forms be substit'iited therefor which substantially the same modeof operation whichlth e lt e e anated;met stas s em the scope. of-the invention, And it-will besparticularlv ;noted :that although we havereferred to the present invention 'as being particularly"applicable for use in conjunction with our pendingapplication for patent :l leretofore referred to, ,we' do not limit ourselves to ,such use fbut claim theinvention; broadly for all uses to whichqitcan beeapplied. I

By theterm aetuatingmechanism employed in the specification is meant any sub-combination, or its equi alent, "acting' iudividually to perform a single f imctipn, or a coin several sub-combinations to perform'.;a plurality ---;of.: functions, and when the phrase"actuati ngmechanism? occurs itmay mean only submbinition, if that combination performs its functi I i mean two or more sub-combinations if such are'coacting to perform-functionsgin the manner specified.

We are 'aware'that'va'rious patents have been issued, both foreign 'and domestic, fortype' casting and setting machines operatedby key-board actions, and also for type casting machines per se,; for use in type foundries which require skilled labor to adjust and operate; therefore, we do not include within our claims such machines or combinations, but we believe that we are the first to invent a machine for producing type that is adapted, and practical, for use in printing oflice and which can be operated by unskilled labor. We 'believe we are the first to invent a machine in which the actuating mechanisms will adjust or regulate themselves to the conditions established by any size of mold that may be selected from a wide range of different sizes. Our claims, therefore, include any means that operate by substantially the same mode herein employed, and which produce the same result, whether specified or not.

We claim as our invention: r

1. In pump mechanism for type casting machines, the

' combination of a pump plunger, a well, means for supplying molten metal to said well, and an overflow passage connected to the well independently of said metal supply and directly controlled by said plunger, whereby the flow of molten metal is not entirely stopped, but only diminished after the type cavity has been filled in casting small 2. In pump mechanism for type casting machines, the combination of a pump plunger, 'a well, having an inlet and an outlet, and an overflow passage which is closed by the pump plunger, whereby, when casting large type the discharge of molten metal through the overflow passage is cut off.

3. In pump mechanism for type casting machines, the combination of a. pump well, a pump plunger, and means directly controlled by said plunger, to prevent the sudden stopping of the molten metal flow when casting the smaller sizes of type, whereby an'abnormal strain and jar on the parts is obviated.

4. In pump mechanism for type casting machines, the combination of a pump welL-a pump plunger, mechanism to exert the same pressure. on said plunger when casting both large and small type, and means directly controlled by said plunger to prevent an abnormal strain and jar on the parts involved 'when casting the smaller sizes of type.

5. In a'pump and metal valve operating mechanism for v type casting machines, the: combination of a well, a pump whichapplies force to the said I and disengage the weight, and, valve in chani ons inthe manner specified, orit mayplunger to eject molten metalffrom well, at weight,

' p unge'r, a latch to ngage ,and a spring to instantly places-aid valve mechanism in itsnormal position wherebythe flowot' the' molten I cut oli" at the proper temperature. H i

6. In pump an d metal valve 'a ting ,mechanism for' type castiug'machines, 'the'comb ation 'of' receptacle, pump mechanism to eject the molten netal from the receptacle. valve mechanism 'controlling'molten metal 0 said valveand pump mechanisms, and means'itoinstantly disconnect the weight from the said mechanisms during any part of the movement thereof, whereby the"mechan'- isms will be returned instantly to'thjeir normal I to properly perform'the functions involved.

7. In pump operating mechanism for'type' casting machines, the combination of a well, a pump plunger to eject 5 -molten metal from the well, a weight which applies force ports'of the receptacle, 'weig'lit mechanism attached the positions 8 5 to the said plunger, andmeans arranged'to disconnect the weight from the plunger'at variable periods .during the movement of the weight, whereby the pressure is released from the molten metal in accordance with any diminution. in the size'of the-type that may be cast. S. In pump operating mechanism for type casting machines the combination of a well, a pump plunger to eject molten metal from the well, a weightto apply force to the plunger, and mechanismto engage and disengage the weight and plunger, whereby the force of the weight is exerted on the plunger to cast the type, and released'there- 1'00 from when the type has been cast.

9. Inpump operating mechanism for "type casting machines the combination of pump'mechanism to ejectthe .molten metal, power mechanism to apply force 'to 'said- I pump mechanism, means connecting the two and meansforvariably releasing said connection, whereby said two mechanisms may be discorfnected soo er or later to suit the conditions arisingin casting various sizes of type.

10. In pump operating mechanism for type casting ma chines, the combination of a pump plunger to eject the molten metal into the type cavity, a weight to apply force to said plunger, and mechanism connecting the two, whereby the force of the :weight in dropping is transmittedto I the plunger.

' .11. In a machine for casting type of various sizes, the combination of a pump,plunger to eject molten metal from the pump well, and means for periodically operating .the

pump plunger, said means including a fined force which does not vary during the stroke of the plunge r.

12. In a machine of the character described, the combination of a pump plunger to eject the molten metal into .the type cavity, means for applying a predetermined and unchanging force to said plunger, and means controlled by the pump plunger for preventing an abnormal strain and jar on the parts type. v

13. Ina machine of the character described, the combination of a pump welL having a relief port, a pump plunger ,adapted to close said port and means for applying a prede-' termined and unchangingforce to said plunger.

14. In a machine of the character described, the combination of a pump well having a relief port or overflow passage, a. pump plunger adapted to close said relief port, a weight, and means for'engaging said weight with said plunger and also for disengaging thesame therefrom.

15; In a machine for casting type of various sizes, the combination ofa receptacle for containing molten metal, valve mechanism for controlling the flowof. metal from said receptacle, and an automatic device provided with involved when casting the smaller sizes of means for varying the time in which the valves are opened and closed to conform to different sizes of type cast.

16. In a'machine of the character described, the combination of metal supplying pump mechanism, means for applying a fixed force for actuating the same, the pressure .1

of said force being unvaried during the stroke otsnidmechanism and a device for automatically governing. the application ofsaid fi xed force, whereby the pressure upon the metal is varied in accordance .with the size of thetype cast anda relatively uniform density of the different. 5

sizes of type is maintained.

17. In a machine of the character described, the combination of metal supplying pump mechanism, means for applying a fixed force for actuating the same, said force being unvaried during the stroke of said pump mech- 5 anism, and a device for automatically governing the application of said fixed force, whereby the pressure upon the'metal-is varied in accordance with the size of the 'size'of the type to 'be cast.

20. Molten metal valve and pump operating mechanism,'

comprising a weight, means for elevating the same, a latch adapted to support said weight in .its elevated position,

i and means for automatically disengaging said latch.

21..-Molten metal valveand pump operating mechanism, comprising a weight, means for; raising the same, a latch adapted. to engage and support said weight in its elevated position, and means for moving said latch, whereby the same will not engage said weight.- I

22. Molten metal valve andpump operating mechanism, comprising a weight, a shank loosely connected thereto, a latch carried .by said shank, means for elevating said weight into engagement with said latch, and means for disengaging said latch .at variable periods determined by the size of the type to .be cast.

means for dropping said weight at times determined by the 23. Molten metal valve and pump operating mechanism, comprising a weight provided with a keeper, a shank loosely connected to said weight, a latch carried by said shank and adapted to engage said keeper, and means for disengaging said latch at variable periods determined by ,the size of the type to be cast.

24. Molten metal valve and pump operating mechanism, comprising a weight, a latch, a lifting device for said weight, means for operating said lifting device, whereby said weight is moved into'engagement' 'with said latch, and means whereby a continued movement ofsaid operating, means will disengage said latch.

25. Molten metal valve and pump operating mechanism, comprising a weight, means for elevating the same, a latch provided with a lower inclined portion, and means for engaging the inclined portion of said latch, whereby the latter is disengaged at variable periods determined by the size of the type being cast.

26. -Molten'metal valve and pump operating "mechanism, comprising a weight, a shank having a loose connection with said weight, a spring for holding said shank normally a elevated, a latch carried by said'shank and adapted to engage said weight, and means for disengaging said latclr at periods determined by the size of the type being cast.

, In testimony whereof, we have signed this specification in the presence of two subscribing witnesses.

FRANK HOWARTH BROWN. JOHN EDWARD HANRAHAN. GEORGE ALBERT BOYDEN.

Witnesses ELDnInGn E. HENDERSON, Anils'man M. WEBB.

Images