US1795583A - Jack - Google Patents

Description

March 1( 1931. G. E. WEAVER ETAL JACK Filed may 2a, 1928 2 Sheets-Sheet l i v WE E I/10611516 )pmw Z 7 G. E. WEAVER E'I'AL JACK 2 Sheets-Sheet 2 Fi led May 26. 1928 g QNAWL Patented Mar. 10, 1931 UNITED TATES P ATE N T F ICE GAILARD E, WEAVER AND ALBERT 'J'. VETTEL, 0F SPRINGFIELD,ILI1INOIS, AS SIGNORS TO WEAVER-MANUFACTURING--COI4IPANY,-OF SPRINGFIELD, ILLINOIS, A CORPO- RATION OF ILLINOIS JACK Application filed. May 26, 1928. Serial No.280,812.

Our invention pertains to or concerns jacks, or' load raising and lowering appliances, such asare commonlyused in garages and elsewhere in connection with inotor-vehicles, its leading aim and object being the provision ofimproved and novel means for controlling the pawls or dogs, or their equivalents, of the elevating and lowering ratchet-mechanism and for raising the loadengaging member or saddle quickly initially without resort or recourse to the slower, but more powerful, step-by-step ratchet-mechanism.

To permit those acquainted with this industry t'o completely understan'd'the invention, a present,desirable embodiment of the same has been illustrated in the accompanying drawings, which form a part of this specification, and throughout the Views of which identical'reference numerals have been used to designate the same parts of the mechanism.

In the drawings,

Fig.1 is a longitudinal section through theimproved jack just inside of one of the side membersof the frame, on line 11 of Fig. 2, the parts of the appliance being shown in condition for raising the load-engaging saddle intermittently by the pawl and ratchet mechanism;

Fig. 2iis abroken plan view of the complete construction Fig.3 is a View similar to Fig. 1, illustrating the load-saddle during its quick, preliminary elevating action; and p Fig. tis a view similarto Fig. 1, showing the parts in condition for lowering the load step by step.

Referring to these drawings, it will be seen that the improvedand novel jack comprises a suitable frame including two side elements 11, 11 suitably spaced apart, the forward end of the frame being equipped with a transverse aXle12 supplied with suitable carrying-wheels 13. '13 adapted to roll on the floor or ground, the-other ends of such side frame members having feet 14 designed to rest on theground during the load raising and lowering operation'and to be raised so that the jack as a whole may be wheeled members, and such handle is'located below a pair of lugs 26, 26 extended inwardly or toward, and in registerwith, one another, so 'that'when thehandle is rocked up or lifted an unusual or excessiveamount, it will contact with the under sides of such'projections and'ra'ise th'e fee't 14' of the frame off of the floor, thus permitting'the jack to'be rolled away on its wheels 13,13 as inay be'required and permitting its ready application in proper position preliminary to the loadelevating operation.

Near its'fulcrumed end, handle 2e has a depending extension or bracket 2? to which a lifting power pawl or dog 28, adapted to cooperate with the teeth or notches of the ratchet-sector, "is fulcrumed at 29, the pawl being normally pulled up toits workby a coiled spring 31 fastened at one endto the handle, at 32, and securedat its other end to a short tail 33 of the pawl.

As is customary in structures of'this general character, a second, locking or holding pawl or dog 34, also designed and arranged toc'oact with the ratchet- 'sectonis hinged on theframe at 35, and is pulled upto its work by a coiled spring 36 connected thereto and to thejack-frame in any appropriate or con venient manner.

In order that the pair of pawls may be caused to operate in the intended manner to perform their usual functions, a suitablyshaped cam 37 is hinged or fulcrum'ed at 38 on the inner side of one of the frame partsll, such cam having an upstanding projection 0r finger 39, and'thetwo pawls have lateral or side pins 41 and 42, respectively, below the lower, cam-edge'surface-of the part 37.

Cir

A bell-crank lever, characterized as a whole 43, is rockingly mounted on the fulcrum-shaft 16 of the ratchet-sector and it is supplied with a spring connected thereto and to the frame, which tends to rock it in a counterclockwise direction as the parts are viewed in Figs. 1, 3 and 4, one arm 44 of such bell-crank lever having a side projection or lug 45 adapted selectively to co-operate with the adjacent, top 1narginalflange 46 of the arm 17 (see Fig. 3) to preliminarily, rapidly raise the saddle 18 substantially to loadcontacting elevation, or to bear on the edge of finger 39 (see Fig. 4) to operate cam 37 during the descent of the load, the other arm 46 of the bell-crank lever having its end pivotally joined at 47 to an end of a rod 48, whose other end is threaded into a connector 49, a locknut 51 being provided to prevent unintentional loosening of the elements.

Such connector or joining member 49 has two ribs 52 and 53 on its under side, affording aligned hearings to slidingly accommodate an end portion of a companion, bent rod 54. the other end of which is hinged or pivoted at 55 to a bent handle 56 fulcrumed on the main operating-handle 24 at 57, and projecting down below such handle, as is clearly illustrated.

That portion of rod 54 in the connector 49 has a cross-pin 58 extended therethrough and projecting therefrom, a coiled spring 59 encircling the rod and bearing at its opposite ends against the pin and the bearing lug 52, whereby the adjacent end face of the rod is normally kept pressed against an abutment or stop 61 forming part of the housing 49.

The appliance is operated practically as follows:

Assuming that the ack has been rolled into proper position to locate the saddle or seat 18 correctly beneath the load, such as the axle of an automobile, the operator, while holding the handle 24 at any convenient location, rocks the handle 56 down, as shown in Fig. 3, and, by so doing, owing to the direct contact between the parts 54 and 61, the bell-crank lever arm 44 is positively swung upwardly, and its side pin 45, by engagement with the under surface of the flange 46, swings the arm 17 upwardly quickly and easily, and, of course, at the same time, the saddle is elevated until it reaches the load, without resort to the slower ratchet and pawl. mechanism, which during this action is idle, the pawls uselessly or inefiectually riding over the ratchetsector teeth.

As soon as the specified resulthas been accomplished, the workman releases handle 56, and, under the action of spring 40, he bellcrank lever and the handle automatically return to their initial or neutral position, as depicted in Fig. l, in which relation of the parts the appliance is ready, by the upward and downward pumping action on handle 24,

to raise the saddle and load through the ratchet and pawl mechanism, step by step, in the ordinary way.

Such natural or ordinary position of the bell-crank lever and the auxiliary handle 56 is determined by the direction of pull of the spring 40, its points of attachment to the bellcrank lever and to the frame being such as tonaturally restore the parts to the locations presented in Fig. 1.

.Vith the elements in this relation, the operator swings the handle 24 up and down without gra. ,ping the handle 56, and the saddle and load are raised by the powerful ratchet-and-pawl step-by-step device in the usual way.

When it is desired to lower the load, the

workman grasps the two handles 24 and 56 together, shown in Fig. 4, and. while they maintained in this relation, he rocks the handle 24 up and down, and the load and saddle are allowed to descend step by step, the cam 37, during that action, being kept in proper relation to the two pawls by the engagement of the bell-crank arm 44 with the cam projection 39.

. such operation, the spring 59 is maintained somewhat compressed, the movements of handle 24 permitting the bell-crank and the cam to shift suiiiciently, during the load-lowering operation, to allow the pawls to correctly perform their functions.

The invention, as defined by the following claims, is susceptible of a variety of embodiments in satisfactory form, and, therefore, it is not limited or restricted to the details of structure herein presented.

Vi e claim:

1. In a jack, the combination of a frame, a relatively slow-acting but powerful means on said frame to raise and lower the load, an operating-handle fulcrumed on said frame to actuate said means, an auxiliary-handle fulcrumed on said operating-handle, and means worked by said auxiliary-handle to operate said first-mentioned means to rise to the load comparatively quickly while its slow-acting elements are idle and to render said slow-acting means operative to enable said operatinghandle to lower the load.

2. In a ack, the combination of a frame, a ratchet-sector fulcrumed on said frame, a load-engaging saddle, means connecting said sector and saddle whereby the rocking of the former will raise or lower the latter, an operating-handle fulcrumed on said frame, a spring-pressed lifting pawl fulcrumed on said handle and eo-operating with said sector, a spring-pressed holding pawl for said sector fulcrumed on said frame, a cam hinged on said frame controlling the operation of said pawls. an auxiliary-handle fulcrumed on said ope 'ating-handle, a springpressed bellcrank lever fulcrumed on said frame and arranged to rock said sector and to coact with said cam to render it active on said pawls, and a divided link connecting said auxiliaryhandle and said bell-crank lever including a connector between the link parts yieldably extensible in one direction and forming a rigid connection between the link sections in the other direction whereby said auxiliaryhandle when rocked in one direction positively actuates said sector through said bellcrank lever to raise said saddle while the pawls are idle and when rocked in the other direction render said cam operative on said pawls during the descent of the saddle and load, said auxiliary-handle when in its normal position allowing said pawls to be operative to raise the saddle and load step by step.

3. In a jack, the combination of a frame, a ratchet-sector fulcrumed on said frame, a load-engaging saddle, means connecting said ratchet-sector and saddle whereby the rocking of the former will raise or lower the latter, an operating-handle fulcrumed on said frame, a lifting pawl co-operating with and adapted to rock said ratchet-sector and actuated by said handle, a holding pawl for said ratchet-sector fulcrumed on said frame, cam means on said frame controlling the operation of said pawls, an auxiliary-handle fulcrumed on said operating-handle, and means operated by said auxiliary-handle to raise said saddle initially quickly and to co-operate with said cam means to render it operative on said pawls during the lowering of the saddle and its load.

4. In a jack, the combination of a frame, a relatively slow-acting powerful means on said frame to raise and lower the load, an operating handle therefor movably mounted on said frame, an auxiliary-handle movably mounted on said operating-handle, and means worked by said auxiliary-handle to opcrate said first mentioned means to rise to the load comparatively quickly while its slowacting elements are idle and to render said slow-acting means operative to enable said operating-handle to lower the load.

5. In a jack, the combination of a frame, an operating-handle movably mounted on said frame, a relatively slow-acting powerful means on said frame actuated by said handle to raise the load,'an auxiliary-handle movably mounted on said operating-handle, means to cause said auxiliary-handle, when permitted to do so by the operator, to assume automatic-ally a normal position with relation to said operating-handle in which said powerful means is operative to raise the load slowly upon actuation of said operating-handle, means operated by said auxiliary-handle when the latter is moved from said. nor mal position to cause said load-raising means to rise to the load quickly while its slow-acting elements are functionally idle, and means operated by said auxiliary-handle when the latter is moved otherwise from said normal position to allow said operating-handle to lower the load gradually by said slow-acting means.

6. In a jack, the combination of a frame, an operating-handle fulcrumed on said frame, a relatively slow-acting powerful means on said frame actuated by said handle to raise the load including a load-engaging saddle, an oscillatory sector fulcrumed on said frame and lifting and holding pawls co-acting with said sector, an auxiliary-handle fulcrumed on said operating-handle, means to cause said auxiliary-handle, when permitted to do so by the operator, to assume automatically a normal position with relation to said operating-handle in which said pawls are operative to raise said saddle step-bystep by said operating-handle, means operated by said auxiliary-handle when the latter is moved from said normal position to cause said saddle to raise quickly initially to engage the load while said pawls are functionally idle, and a cam actuated by said auxiliary-handle when shifted otherwise from said normal position to cooperate with said pawls to permit the step-by-step descent of the load upon actuation of said operatinghandle.

In witness whereof we have hereunto set our hands.

GAILARD E. WEAVER. ALBERT J. VETTEL.

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