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Publication numberUS1407362 A
Publication typeGrant
Publication dateFeb 21, 1922
Filing dateJan 18, 1921
Priority dateJan 18, 1921
Publication numberUS 1407362 A, US 1407362A, US-A-1407362, US1407362 A, US1407362A
InventorsLouis Ullman
Original AssigneeLouis Ullman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pliers and locking lug for replacing transmission covers on ford cars
US 1407362 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)



APPLICATlON FILED JAN-18,1921- 307,3 2,- Patented Feb. 21, 1922.


I l/Vl/E/VTOR Lows (/l/man A; ATTORNEY L. ULLMAN.


1 ,40'7, 362,, Patented Feb. 21, 1922.




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Specification of Letters Patent.

Patented Feb. 2i, mas.

Application filed January 18,1921. SeriaI No. 435,123.

' in is a specification.

. iy inventlon relates generally to an 1111- proved tool for facilitating the assembling of theparts of a Ford transmission system, and it has especial reference to pliers adapt- 'ed to simultaneously compress the three springs forming a part of such system, and to a lock or looking lug for holding the pedals immovable while-the pliersare being used on the springs.

It is a well known expedient to provide means by which'the triple pedal springs mounted on the pedalspindles may be compressed for the purpose of assisting inassembling a'transmission case of the Ford and pliers have been designed to aid in this work, but so far as I am aware compression pliers having jaws movable in parallel relation to each other as they approach and recede, and the combination therewith of a device for locking the pedals in afixed position to further aid in properly locating the springs before compression, are new in the art. The greatest difficulties encountered with existing: devices are first, that because the jaws of the pliers, embracing the springs, approach each other in an arcuate line, the springs are caused to buckle and bind against the pedalspindles'; and second, that no means has been provided to hold the spindles in their extended positions during the manipulation of the pliers.

Thus, inasmuch as the ease with which the springs may be moved transversely otthe spindles depends upon the axis of the springs remaining straight; it will be apparent that the provision of a device, which will not cause the axis of the springs to become deformed during compression, will be a decided advantage over those now in use.

With thedefects of existing structures in mind, the principal object of the present invention is to provide a device by means of which the springs may be compressed in a straight line and during such compression the pedals be held in locked position so as to prevent'interterence with the work of compressing the springs.

A further object of this invention is to provide the walls of the tool openings which span the spindles with shoulders thereby forming seats for the reception of the end coils of the springs, to prevent the latter from buckling during compression of the springs. Such shoulders, when the coils are seated'therein, prevent contact of the tool with the spindle, and possible injury to the latter. r r

The invention comprises the novel features of construction, combinations, relations and arrangements of parts disclosed in the following specification and fully illustrated in the accompanying drawings, wherein:

Fig. 1, is a perspective view of the cover portion of a Ford transmission case showing the triple compress-ion pliers in operative position about the pedal springs and the pedal locking device holding the pedals against movement in either direction.

Fig. 2, is a fragmental plan view of the cover casing adjacent the bearings for the pedal spindles, showing the cam surfaces and the locking device in its operative position.

Fig. 3, is a front elevational pedal locking device.

Fig. 4:, is a side elevational view of the triple spring compression pliers in its closed position, showing the spring compressed between the jaws.

Fig. 5, is a similar view to that shown in Fig. 4 except that the pliers are extended and the spring expanded.

Fig. 6, is an elcvational view of the inner side of one oi the clamping jaws showing the springs in the seats.

Fig. 7 is substantially a sectionalv view talren on the lines. 7''? of Fig. 6.

Referring to the drawings, 10 denotes the cover portion of a Ford transmission case raving a suitable manhole 11. The reverse, slow speed and brake pedals 12 are mounted upon spindles 13 carried transversely of the cover 10. Cum surfaces 1% provided on the hubs ot the two outer pedals and on the spindle of the intermediate pedal are engaged by opposed cam surfaces on the edge of the bearing bosses of the case 10. hen the cams 14: are in their normal or view of the engaged position the outer spindles 13 ex tend nto the case their maximum length and the intermediate spindle is moved out-.

wardly, leaving a space between the hub of the pedal thereon and the edge of the hearing boss, this space belng utilized for the purpose hereinafter described. The spindles 13 are'held in their respective positions by coiled springs 15 which abut against the inner surfaces of the ears of the transmission bands, not shown. The normal tendency of these springs 15 is to hold the cams 1 1 engaged resulting inan upright position of the pedals 12.

In. order to lock the pedals in their up right position a pedal lock is provided con sisting of a fiat steel member 17 having a centrally located bifurcation 18 extending from the edge thereof to a point well into the body of the lock. One end of this-lock 17 is provided with a button 19 having its exposed surface concaved to receive the rounded end of one of the spindles 13. The opposite end of the tool 17 carries a clamp screw 20 movable transversely of said tool;

' and the inner end of said screw supports a swivel 21 having its outer-surface 'coneaved central spindle, as hereinafter described. A

suitable openingmay be provided in the lock 17 to receive one end of a flexible chain 22 having its opposite end attached to one handle of the pliers about to be described.

The pliers 23 consist primarily of the handle members 24: which'are pivotally interconnected and by a pivot screw 25. EX tending beyond their pivotal point 25 a distance considerably less than the length of the handles 241 are the rounded nose portions 26 having transversely disposed pivot pins 27 adapted to pivot between ears 28; said ears being carried by opposed toggle jaws 28. The lower portion of each of the jaws Y 28 is provided with three slots 29 adapted to receive the spindles 15, and the marginal wall of each slot is provided witha shoulder 30 to form a seat for the end coil'or coils of a spring. j

The clamping toggle jaws 28 approach each other substantially parallel to the axes of the spindles '13; this'inovement is made possible by a cam follower 31 provided at 7 each of the opposite upper ends of the jaws 28. These followers 31 areheld against cam surfaces 32by means of a coil spring 33 having its opposite ends attached to theface of the followers 31. The cam surfaces 32 are the edges of the handles adjacent their pivot 25, and are of such curvature to permit the followers 31 to rest thereon, to approach at the end o'f'oneof the handles 2% and adapted to be received by the bifurcated end 37 of the other handle member. A winged nut 36 ismounted on the free end of the hinged boltso that itmayengage over the outer edge of the handle and holdthe two inenibersin a fixed closed position. The opening38 in one of the handles 24 is'pro- V vided to receive the other endof the flexible chain 22 before referredto.

. In the manipulation of the tool constituting this invention it isnecessary for the transmission bands to be held in their respective positions about the drums while the 7 cover casing 10 is separated'from theunder section of the transmission case. This may bedone in any suitable manner, and results in bringing the openings 1n the two ends of each band in axial alinement and the springs Assuming that the necessary repairs or adjustments have been made and the transmission cover casing 10 is about tobe' superposed upon the under member of the casing, the necessary steps required to lock the pedal spindles 13 in fixed position and to compress the springs 15 will be as follows:

Both the forward and rear pedals 12 must be moved into an'upright position on the cams 14: so that the spindles 13 may be projected their greatest distance into the interior of the casing 10; the centrally located pedal having its cam movable in an opposite direction must be movedoutwardly in relation to the other pedals. This presents a space between the edge of the bearing boss and the inside oithe pedal'hub, in which The stationary button 19 tightening the clampscrew 20, which will cause an inward pressure upon the front and rear spindles thereby interlocking the cams 1e, and an outward pressure upon the central spindle as the hub of its pedal is used as a stop or fulcrum for the lock 17. The pedals 12 are then securely locked in their respective positions, and by a simple manipulation the springs are movedon the spindles in position to have their opposite ends engaged by the plier jaws.

In Fig. 5 the handles 24 are shown separated and the clamping jaws 28 extended; in this position the pliers 23 may be inserted into the manhole 11 of the covering casing 10 and the jaws 28 moved downwardly about the springs 15 until the three slots 29 of each jaw 28 span the spindles 13 and the seating of the springs in the depressed portions 30, intermediate said jaws, arrest further downward movement. This position of the jaws 28 is shown in Figs. 6 and 7, whereit will be seen that the edges of the jaws do not come in contact with the spindles, but they are held slightly above the latter; by the end coils of the springs 15 which are of a greater gauge than the width of the margin 30. The three springs 15 may then be simultaneously compressed by moving the handles 24- to approach each other, a position illustrated in Fig. 4.

The jaws 28 approach each other in substantially a parallel movement which is caused by the followers 31 being held against the diminishing curve of the moving cams of the handles 24 as the latter are closed. The spring 33 tends to pull the followers toward each other which results in their constant engagement with the opposed cam surfaces 32.

I claim 1. In combination with a spring compres sion tool adapted to embrace the springs carried by the pedal spindles of a. transmission case, of a flexible member having one end attachably secured to said tool, and a locking member attachably secured to the opposite end of said flexible member and provided to engage said whereby the latter may movement. I

2. In combination with a spring compression tool adapted to embrace the springs carried by the pedal spindles of a transmission case, said tool comprising pivotally connected handle members, and clamping jaws pivoted to one end of each of said handle members, of means whereby said jaws may be actuated to approach each other in substantially parallel alignment, a flexible connecting member attachedat one end to said tool, and a locking device attached to the opposite end of said flexible member and provided to engage said. pedal spindles to temporarily arrest movement of the latter.

pedal spindles, be locked against 3. In combination with a spring compression tool of the character described, provided with two pivotallyconnected handle members, each of said handles having one of its ends provided with a clamping jaw, said handle members having cam surfaces cooperating with a portion of said. jaws whereby the latter may be moved to approach each other in a substantially parallel line, of a locking device adapted to engage parts of a transmission control mechanism, whereby the latter may be rendered inoperative to permit the manipulation of said compression tool, and flexible connecting means attached at opposite ends thereof to said tool and locking device.

4:. In spring compression pliers of the character described, the combination with a flexible connecting member attached at one end to said pliers, of a pedal locking tool secured to the opposite end of said con necting member and provided with a slot adjacent its central portion, a fixed seat carried at one end of said tool, and a swivel seat mounted in the opposite end thereof.

5. Spring compression pliers of the character described, comprising two pivotally connected handle members, opposed jaws carried on the ends of said handle members, cam provided on the outer edge of said handle members adjacent their pivotal connection, followers disposed at one end of each of said jaws, and means adapted to hold said followers in engagement with said cams, whereby the approach of the handle members to each other will cause the jaws to approach each other in a substantially parallel plane, the free ends of said jaws being provided with slots, each of the latter being substantially opposite to the slot in the opposing jaw.

6. Spring compression pliers of the char-. acter described, comprising two pivotally connected handle members, opposed jaws carried on the ends of said handle members, cams provided 011 the outer edge of said handle members adjacent their pivotal connection, followers disposed. at one end of each of said jaws, means adapted to hold said followers in engagement with said cams, whereby the approach of the handle members to each other will cause the jaws to approach each other in a substantially parallel plane, each of said jaws being provided with slots in one end thereof, the said slots having marginal depressions provided adjacent their edges and in opposite faces of the jaws, whereby the edges of said slots may be supported against engagement with certain. parts closely adjacent their field of movement.

7. In a tool for the purpose specified, the combination with a pair of pivotally interconnected jaws each having a cam surface at its outer edge adjacent the pivotal point of the jaws, of clamping jaws pivoted to said locking -member having means for simulfirst mulled JHWS and hm'png polrtlons 1n el ltaneously locklng a plurality of spmgdes gagement wlsh sax-1d cam surfaces, and means aga-mst movezfnleult.

for yieldingly holding said portions in en- In testimony whereof I have afiixed my 10 5 gagement wlth sald cam surfaces. slgnature. r

8. In a, tool for the pwfupose specified, a LOUIS ULLMAE, V

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US20080060486 *Sep 11, 2006Mar 13, 2008Thomas Michael RobertLocking pliers for controlled manipulation of loads
U.S. Classification29/226
International ClassificationB25B27/14, B25B27/26
Cooperative ClassificationB25B27/26
European ClassificationB25B27/26