US1316093A - Reversing mechanism - Google Patents

Description

F. W. A. HENHICI.

REVERSINQ MECHANISM. APPLICATION mu) APR. 12. 1916.

Patented Sept. 16, 1919.

3 SHEETS-SHEET I.

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IIIIIIIIIIIIIII VIIIII'IIIIIIIII lnvenior W/ /Z Hen riai,

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F. W. A. HENRICI.

REVERSING MECHANISM.

APPLICATION FILED APR. 12. 1915.

Patented Sept. 16, 1919.

3 SHEETS-SHEET 2.

Inve ni'or Zi'ZZ/Z Henri/oi, 062%,,

F. W. A. HENPJCI.

REVERSING MECHANISM.

APPLICATION FILED APR. I2. I9l6.

1,3 1 6,093. Patented Sept. 16, 1919.

6, 3 3 SHEETS-SHEET 3.

Inventor: 1'71 Z2. Mi Henriai,

Th8 COLUMBIA PLANOGRAPI' cn., wAslllNnrON, n. c.

FRITZ w. A. nnnnrcr, or Bos'roN', MASSACHUSETTS.

REVERSING MECHANISM.

Specification of Letters Patent.

Patented Sept. 16, 1919.

Application filed April 12', 1916. Serial no. 90,762.

" To all whom it may concern:

Be it known that I, Fnrrz W. A. Hnnnror, a citizen of the United States, and a resident of Boston, county of Suffolk, and Commonwealth of Massachusetts, have invented an Improvement in Reversing Mechanism, of which the following description, in connec tion with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to driving and reversing mechanismadapted for use in any case where it is desired to effect periodical reverse motion of a machine, and'aims to produce a novel, effective and inexpensive construction for that purpose, to be operated by the driven member.

My invention will be more easily understood by reference to an illustrative embodiment thereof, and in which- Figure 1 is a vertical cross-section on the line 11, Fig. 2, looking toward the right;

Fig. 2, a vertical longitudinal section on the line 22, Fig. 1, looking toward the left;

Fig. 3, a diagrammatic illustration of the disposition of the circuit-breaking members and wires leading thereto and therefrom, showing the directions of flow of electric currents when the members are in certain positions; i

Fig. 4, a similar illustration ofthe same parts when the circuit-breaking members are in different positions, and

Fig. 5, a detailed plan of some of the contacts. I

Referring first to Figs. 1 and 2, my invention is shown as comprising a supporting and inclosing case A, of suitable material, as metal, and herein pear-shaped in vertical cross section, having front and rear end walls 1, 1. The case is provided with a bearing 2 on its rear wall. The opposite and front wall 1, of the case has an opening or h an dhole therein covered by a plate 3, which may be secured to the case A, by suitable means as screws 4, 4, and this plate 8 has a bearing 5, opposite to. the bearing 2 referred to. The top, bottom and side walls of the case A may consist of a metal plate 6 carried. about and resting on the flanges 7, 7, of the walls 1, 1,.and having its opposite ends suitably secured. i

A rib 8 of suitable dimensions extends from the front to the rear wall of the case, and furnishes convenient means of support for certain other members to be referred to.

Extending longitudinally through the case A, Fig. 2, is a threaded timer and circuit-breaker carrying shaft 9 carrying a shaft-supporting and timer-reversing memi ber 10, as a sleeve, near one and herein the rear end thereof, and which is locked su1tably thereon. A collar 11 is secured conveniently upon the sleeve 10 abutting the bearing 2 of the case A, and thus acts to prevent longitudinal movement of the shaft 9 toward the right. The sleeve 10 is enlarged diametrically near one end producing a shoulder 12.

Adjacent its opposite end, Fig. 2, the shaft 9 carries threaded thereto a second shaftsupporting and timer-reversing sleeve 13, the position of the sleeve longitudinally on the shaft 9 being determined and adjusted by a collar 14 on the outer end of the shaft. The outer end of the sleeve 13 is provided with a plurality of notches or slits 14 to receive teeth 14 formed on the inner re duced edge of the collar 14, the reduced edge servingas a support for the outer end of the sleeve 13. y

This collar 14 is retained on the shaft 9 by screws 14, 14, one of which enters a keyway 14 while the other engages a flat face 14 of the shaft. This sleeve 13 has an adjusting hand wheel 15, secured thereto. By means of the foregoing members obviously the sleeve 13 may be longitudinally adjusted on the shaft 9 for a purpose which will be explained presently. The sleeves 10, 13, are each provided at their opposing faces with longitudinally extended timer throwing posts 10*, 13

Threaded to the shaft 9 between the sleeves 1013, Fig. 2, is a traveling combined timer and circuit-breaker actuating member, as a nut 16, having at substantially opposite points on its two faces, longitudinally extended reversing member engaging posts 16*, 16, adapted to engage the posts 10*, 13 on the timer reversing sleeves 10, 13. Rotatably mounted upon the sleeves 10, 13, Fig. 2, is a circuit-breaker or cam carriage B, which acts also as a current distributing member. This carriage comprises an end disk 17, a similar opposite end disk 18having anextended sleeve 19 thereon, the sleeve provided at its outer end with a hand-adjusting wheel 20. i 1

These two disks 17, 18, Fi 2, are securely locked togetherby suitable tie members, as bolts 21, 21, 21. The disk '17 is positioned 'riage B, the timer nut 16 being grooved at 23, 23, to receive them, andthe pins 'are preferably inclosed by atubular member as a sheet of metal 21, to prevent oil from reaching the parts to be presently described.

This reversing mechanism is particularly adapted for use in connection with a motor as the driving medium, andfor eontrolling the operation of the motor bytheconstructiondescribed, I have conceived novel andeifectiveuneans, which I will now describe. i i

For closing and opening the several electriccircuits tothe reversing motor to be referred to and from the generator or, other source of power, Ipre'fer to usc cams and they are herein three in number; two of them controlling the circuits to the motor, I have called operating ca ns .or circuit breakers 24, 25; and athird one controlling the reversing switch circuit, I havetermed a eswitch cam 26 or; circuit breaker, the. latter being somewhat shorter than the others and all, arecarried by pins 21,21, 21, best shown in Fig. 2.

Inthis figure the cams are shown for the purpose of clearness, as if th were rotated a'partial'turn to the right, Fig. 1, with the posts 16, 16", in horizontal, position. a Within each. cam. and.ab,out each olfthe'pi ns 21, 21, 21, is a suitable ,ijnsulating member 27, and within the cams and carried thereby is a tubular insulating member .28." To guard against too great movement of thecam carriage B, I provide it with a frictionalhold ing device comprising aplatee29 resiliently supported upon two springs 29- .positioned by posts 29", supported by any convenient part of the case A. At substantially the center of the plate 29 is a hump or,rib 29.

When the carriageB is moved,the ,post

25*, extended laterally from the disk 18, contacts with plate 29 which yields sufficiently to permit the post 25 topass under the action of the timer 16 but prevents it from rotating freely, if for any reason, it is inclined to do so. To prevent the carriage B from stopping midway between the contacts 32 and 31 and adjacent contacts on each side of the cams and thus. stopping themaehine, if through any accident it was.in clined .to do so, I have provided the sharply inclined hump 29, which compels'the post 25 to stop on one side ofthehump and not directly on it. To properly insulate these cams- 24, 25, 26, fromeach'other, I have provided between them a plurality of disklike insulators 30.

For carrying the contacts of the several electric circuits, Fig. 2, to be engaged by the cams 24, 25, 26, I utilize the rib 8, previously referred to.

mounted contact plates 31,32, by means of Upon this rib are cally as referring to-any source of electric current, as clearly it is immaterial what the, s ource of the current may be.

There is also, Fig. 2, a third contact plate ,33 carried bythe rib 8, secured by the bind ing, post 36 and having connected to it the line 3 7,leading Fig. 3,.to a reversing switch C. Each contact is properly insulated as by members 38, 38. This switch C may be of any approved type, and is conventionally illustrated Fig. 3, as comprising a magnet 37 connected with the lines 37, 35, contacts 37, 37 interposed in the line 35, the magnet 37, adapted to be energized to throw the armature 37 against the contacts 37", 37, and thus complete the circuit through the operating circuit breaking cams 24, 25. 7 At one side-of the case A, and near the lower part thereof, Fig. 1, is an upwardly extended rib 39 and there are secured to it what, for convenience, I term constant contactmembers 40, 41, 42, by bindingposts 43,44, 45, which also secure to said contacts, wires 46, 47, leading to the armature of the reversing motor 4", Figs. 3, 4, and a wire 48 to the generator line 34.

The outer ends of these contacts 40, 41, 42, .see Fig. 1, are bent in such a way as to form resilient cam engaging ends to be engaged by. the [ cams 24, 25, 26, when either of the cams arein position to do so.

The contact plates 31,32, 33, are forked,

see Fig. 5, having each two depending camengaging contact arms 31, 31", 32, 32, 33"- .33", the arms 31, 32 depending at the lefthandside, Fig. 1, {of the cams 24, 25, 26, while the other and opposite arms 31*, 32*, :33, depend at the opposite or right-hand side of .the cams, opposite and in suitable position to be engaged by the cams. These depending, oppositely disposed contacts I have termed, for convenience, alternating contacts. The arms 31*, 31 and 32, 32", however, do not depend opposite each other, respectively,but are crossed, see Figs. 4 and 5, in order that the current may be conducted to the motor in either direction.

For operating the shaft 9, Fig. 2, and the several parts already described from the driven member, the shaft 9 may be equipped with any convenient means, and herein is provided with a dog 49, adapted to be engaged by a suitable member, as a dog 50 on the shaft 51 of the driven member. 7

; rotate shaft 9 of the reversing mec L 'rotate, being restrained The operation of my improved mechanism is as follows:

From what has been said already, it will be apparent that at all times, the cams 24, 25, 26, are in engagement with the contacts 40, 41, 42, and either contacts 32", 31 33", or 31, 32 33, respectively. Assuming then, the several parts to be in position shown in Fig. 1, and referring to Fi 3 for a diagrammatical disposition of t ese parts, and of the connections, the machine to be driven will be assumed to be operatively connected to the motor 47 and rotated in such direction as will cause its shaft 51 and dog 59 to anism in the direction of arrow, Fig. 2, i. 6., from left to right. Under these conditions, the

current willflow from the generator overline 34 to contact plate 31, contact 31", cam 25, contact 41, line 47, armature of motor 47, line 46, contact 40, cam 24, contact 32, plate 32, line 35, through the switch 37 back to its source.

As the nut 16, threaded to shaft 9 cannot by the pins 22, 22, it will, by the rot.tion of shaft 9, be caused to travel longitudinally thereon from right to left, Fig. 2. As the machine continues to rotate in this direction, nut 16 travels toward the left, Fig. 2, until its post 16* is engaged by post 10 on the sleeve 10, rotating with the shaft 9, which will then rotate the nut 16 a partial turn from left to right.

The nut 16, by its engagement with pins 22, 22, on the cam carriage B will simultaneously rotate the cam carriage and its earns 24, 25, 26, from right to left, dotted line position Fig. 1, breaking their engagement, Fig. 3, with contacts 32*, 31 33 and, while still in engagement with contacts 40, 41, 42, Fig. 4, throwing said cams into engagement with the contacts 31 32 33.

When the timer 16 acts upon the cams 24, 25, 26, the cam 26 as stated, being shorter than the other two, is the first to break the switch circuit at the contact 33 in the circuit line 34, line 48, plate 33, and line 37, to magnet 37. The result is that the magnet 37, being deenergized, the blade 37 moves under action of the spring 37 and breaks the circuit through line35 from plate 31 to generator, and the cams24, 25, after coasting a short time, come first into engagement with contacts 31, 32 and subsequently the cam 26, on account of its shortness, also comes into engagement with the contact 33*.

When the cam 26 engages contact 33*, Fig.

4, the circuit to the switch C is again established, and the current flows thereto by line 48, contact 42, cam 26, contact '33, plate 33, line 37, enegizing magnet 37 causing blade 37 to close the circuit through the line 35, and causing current to flow through line 34, plate 31, contact 31, earn 24, contact 40,

line 46, motor 47 in reverse direction to line 47 contact 41, cam 25, contact 32, plate 32, line 35, through the switch C, to the generator.

When the direction of the operation of the driven member has been changed, the nut 16 will of course travel in the opposite direction until its post 16 is engaged by the post 13 on sleeve 13, when it and the cams will be again thrown, the current shifted to flow in the reverse direction as before and again reversing the direction of rotation of the driven member.

When starting the machine, the circuit breaking cams 24, 25, 26, will be positioned in contact with the contacts 40, 41, 42, and either contacts 31*, 32, 33, or 31*, 33 32", according to the direction in which the machine was moving when it stopped.

Assume, for instance, that it stopped with the circuit breaking cams in position shown in Fig. 4: the switch Qbeing open asper dotted line position Fig. 4. When the current is turned On the line 34 it will pass through lines 48, circuit breaking cam 26, line 37 to magnet energizing the same, closing switch C, causing the current to flow through line 34 and line 35 actuating the motor 47 a and starting the driven member.

The foregoing provides a simple and reliable construct on for securing an equal number of rotations of the rotating memher in each direction.

The distance of travel of the nut 16 in each direction being necessarily the same, inasmuch as it is engaged alternately by the posts 10 and 13, it insures regular periodical reversal of the direction of rotation of the driven member.

Whenever it is desired to change the length of time that the driven member shall be operated in one direction, either to increase or decrease it, this may be done readily by simply loosening the screws 14 in the collar 14 on the shaft 9, sliding thecollar on the shaft to withdraw the teeth 14 from the slots 14 in the sleeve end, turning the sleeve 13 on the shaft 9 by means of the wheel 15 to increase or decrease the distance of the post 13 from the post 10*, and then again locking the sleeve 13 in adjusted poslizion by means of collar 14 and the screws While I haveherein described one embodiment of my invention it is obvious that the same may be modified'in many details in construction without departing from the spirit of the invention and scope of the appended claims.

Claims:

1. Reversing mechanism comprising a plurality of operating circuits leading to a reversing motor, a switch circuit, including a switch controlling the operating circuits,

means for connecting all the circuits with a' source of electricity, a shaft rotated from shaft,

actuator thereon, a circuit breakers carried by theshaft, a switch circuit breaker also carried bythe shaft a 'l1'10t01,"-I11G2U1S openatiiig circuit breakers with I theniotor, mg and closing and: means on the shaft for: openat stated times the'switch and operating circuits to effect reversal of motion oft the driven inember. I

2. Reversing ii'iechanism comprising a a combined timer and circuit breaker plurality of 1 operating for 1 connecting the means for connecting all the circuit breakers Wltll a source of electric ty, 1 and a SWltcll connected with-the switch'circuit breaker -and controlling the operating circuit breakthereon, ,the support, a plurality shaft, a motor,

ersand motor.

3'.- Reversing' mechanism porting member, a shaft thereon, a combined movable timer! and circuit breaker actuator aplurality of constant contacts on ofoppositely disposed alternating-contacts also thereon; a

plurality of operating circuitbreakers and a switch circuit breaker operated by the means for connectlng the operating circuit breakers with the motor,

and means for connecting all'the circuit breakers with a source -.of electricity.

I Reversing mechanism comprising asupporting member, a shaft thereon, a combined movable timer and circuit breaker actuator thereon, a plurality of constant contacts on said support, a plurality of oppositely disposed alternating contacts thereon, timer adjusting means adjacent the shaft; a plurality of operatiing circuit breakers and a I switch circuit breaker on the shaft, a motor,

meeting all the circuit breakers with a;

thereof thereon, a

posed alternating contacts also thereon,

timer adjusting means adjustable relative to the shaft and controllingthe extent of movetimes i of reversal ment of the timer and a plurality of operating circuit breakers and a switch circuit'breaker on the shaft, a motor, means for connecting the operating circuits with the motor, and means for connecting .all the circuit breakers' with a source offelectricity.

\ 6. Reversing mechanism comprising a supporting member, a shaft able timer and circuit breaker actuator plurality of constant contacts on said support, a plurality of oppositely disposed -alternating contacts also thereon, timer adjustingmeans comprising a-sleere, adjustable on the shaft, and locking means the motor,

- of electricity,

comprising a sup i-ality of ope :operatiiig breakers actuated by thereon, a -mov-.

supporting member, able timer-and circuit breaker actuator theretherefor; a plurality of operating circuit breakers and a switch circuit breaker on the shaft, ainotor, means for connecting the operating circuit breakers with the motor, and means for connecting all the circuit breakers with a source'of electricity. 7.;Reversii'ig mechanism comprising a sup porting member, a Sllttfll'llllOlGOll, a movable timer and circuit breaker actuator thereon, aplurality. of constant contacts on said support, a pluralityof oppositelydisposed alternating contacts also thereon, timer adjusting'ineans adjacent the shaft; a motor, means for connecting a plurality of alternating contacts with the switch and source "and ii'icans for connecting a plurality of constant contacts with the niofor establishing operating circuits, a pluatingcircuit breakers in the circuits, ,and a switch circuit breakerin the switch circuit, all the circuit said timer. 8. Reversing mechanism comprising a supportingmember, a shaft thereon, a XUUY- vable tuner and circuit breaker thereon, a plurality a cl ua tor of constant contacts on said support, a plurality of oppositely disposed alternating contacts also thereon:

timer adjusting means adjacent the shaft, means forconnectmg a plurality of alternating contacts with the switch and the source of electricity,'and means for connecting a plurality of constant contacts with the motor establishing operating circuits; at circuit breaker and current distributing carriage movably mounted and actuated by said timer, a plurality of operating circuit breakers in said operating circuits, and a switch circuit breaker in the switch circuit, and on said carriage.

9.-Reversing mechanism comprising a supporting member, a shaft thereon, a movable timer and circuit breaker actuator thereon, a plurality of constant contacts on said support, a plurality of oppositely disposed alternating contacts also thereon;

timeradjusting means adjaceiit the shaft,

means for connecting a-plurality of constant contacts with the-motor and means for con necting a plurality of alternating contacts with a source of electricity and the switch establishing operating circuits; a circuit breaker and current distributing carriage 'rotatably mounted, a plurality of operating circuit breaking cams on said carriage and m the operating c1rcu1ts, a switch circuit breaking cam on said carriage and in the switch circuit.

1O.-RVG1SlD mechanism com )risin a a shaft thereon, a inovon, a plurality of constant contacts on said support, a plurality of oppositely disposed alternating contacts alsothereon; timer adustmg means ad acent-the shaft, means for connecting a plurality of constant contacts wlth the motor and means for connecting a plurality of alternating contacts with the switch establishing operating circuits; a circuit breaking carriage rotatably mounted on said shaft and within the field of said contacts, a plurality of operating circuit breaking cams in said operating circuits, and a switch circuit breaking cam in said switch circuit, all on the carriage.

11. Reversing mechanism comprising a supporting member, a shaft thereon, a movable timer and circuit breaker actuator thereon, a plurality of constant contacts on said support, a plurality of oppositely disposed alternating contacts also thereon; timer adjusting means adjacent the shaft, means on the shaft for adjusting the timer controller relative thereto to regulate the time of reversal of the timer; means for connecting a plurality of alternating contacts with the switch and means for connecting a plurality of constant contacts with the motor establishing operating circuits; a circuit breaking carriage rotatably mounted on said shaft within the field of said contacts, a plurality of operating circuit breaking cams in said operating circuits and a switch circuit breaking cam in the switch circuit, all on said carriage; said operating and switch circuit breaking cams normally in contact with said constant contacts and one set of alternating contacts, and adjusting means on the carriage for said circuit breakers.

12. Reversing mechanism comprising a casing, a cam carriage mounted to rock therein, carrying operative circuit closing cams and a switch circuit closing cam, each in an electrical circuit, a plurality of alternating contacts, and a traveling timer for actuating the circuit closing cams to alternately engage the alternating contacts.

13. Reversing mechanism comprising a casing, electrical operating and switch circuits therein, constant contacts therein, alternate contacts therein, operating circuit breakers in the operating circuits, a switch circuit breaker in the switch circuit controlling the. opening and closing of the operating circuits, and adjusting means for determining the time for opening and closing of said circuits.

In testimony whereof, I have signed my name to this specification.

FRITZ W. A. HENRICI.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. 0.

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