US1253483A - Jack. - Google Patents

Description

l zas o J. H. GLASENER.

APPLICATION FILED APR-7.191?- JACK.

Patented Jan. 15, 1918.,

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1. H. GLASENER.

JACK. 7 APPLICATION FILED APR. I, 1917. h wfififiu Patented Jan. 15,1918.

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JACK. APPLICATION FILED APR. 7. I917. l fififim. Emma Jan. 15, 1918.

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JOHN HOWARD GLASENEB, 0F MANSFIELD, OHIO.

JACK.

Specification of Letters Patent.

Patented Jan. 15,1212.

Application filed April 7, 1917. Serial No. 160,505.

To all whom it may concern:

' Be it known that I, J one: H. Gmsnnnn, a. citizen of the United States, residingat Mansfield, in the county of Richland and State of Ohio, have invented certam new and useful Improvements in Jacks, of which the following is a specification.

My invention relates to improvementsln quick action jacks for use in connection with automobiles or the like.

An important object of the invention 1s to provide means whereby a plurality of pawls is adapted to cooperate with a rack baig n raising and lowering the same, in a highly expeditious manner.

A further object of the invention is to provide simplified means, for causing the plurality of pawls to alternately operate as raising or lowering means, for the rack-bar. A further object of the invention lsto provide means whereby the standard of the jack may be longitudlnally ad usted, depending upon the height of the work to be raised and lowered.

Other objects and advantages ofthe 1nvention will be apparent during the course of the following description. i

In the accompanying drawings forming a part of this specification and in which l ke numerals are employed to designate 111; parts throughout the same, 1

Figure l is a side elevation of a ack embodying my invention,

Fig. 2 is a horizontal sectional view taken Fig. 3 is a vertical sectionalview taken on line 3-3 of Fig. 1,

Fig. 4 is'a horizontal sectionalvlew taken on line H of Fig, 5, a

Fig. 5 is a side elevation of the upper portion of the standard and housing, the side plate of the housing being removed for the purpose of illustration,

Fig. 6 is a fragmentary edge elevation of the upper portion of the standard, housing, and associated elements,

i Fig. 7 is a side elevation of meansfor preventing the separationof the standard sections,

Fig. 8 is a similar view of means for preventing separation of the lift bar and standard section, and,

Fig. 9 is a detail vertical section taken on line 9-9 of Fig. 1.

In the drawings, wherein for the purpose of illustration is shown-a preferred embodiment of my invention, the numeral 10 des ignates a standard, which is preferably longitudinally adjustable, and for this purpose the same is formed in a pair of telescoping tubular sections 11 and 12. The

lower tubular section 11 is provided at its shaft 17, (see Fig. 2). The free end of the dog 16 contacts with the upper standard sec tion 12, and thereby has its downward movement positively restricted. The rock-shaft 17 is journaled through the cylindrical por tions of horizontal and vertical key hole openings 18 and 19, formed in the opposite sides of a hollow bracket 20, preferably cast integral with the lower standard section 11. At one end, the rock-shaft 17 is provided with a stopshoulder 21 (see Fig. 2), and a crank 22, extending from this stop shoulder and serving to turn the rock-shaft. At its opposite end, the rock-shaft 17 is provided with a lateral extension 23, which is normally inclined with respect to the key hole opening 18, thus preventing the longitudinal movement of the rock shaft toward the stop shoulder 21, which prevents the longitudinal movement of the rock-shaft in an opposite direction.

As shown in Fig. 7, the lower standard section 11 is provided with a slightly inwardly bent depending tongue 24, adapted .to contact with a transverse portion 25 of face of the socket.

Mounted to reciprocate within the socket 30 and the upper standard section 12 is a rack-bar 32, provided upon its opposite edges with sets of downwardly faced ratchet teeth 33. i i a side portion 28 constitutes the opposite side extending levers 39, which are pivotally con- The rack-bar 32 is provided upon its opposite sides with longitudinal grooves "crue pressions 34, and at the lower end ofione longitudinal depression 18 a transverse stop flange 35, (see Fig. 8) to contact with a stop finger 36 carried by one side of the socketf and bent inwardly therefrom. It is thus nectcd at their lower-ends, to the support bracket 38, as shown at 40. Rigidlyconnected with the levers 39 and preferably formed integral therewith is a socket 41 for the reception of a handle or crank to operate, the

7 active parts of the jack. Arranged upon the opposite sides of the other support bracket 38 are co-acting upstanding levers 42, pivoted thereto as shown at 43. Ar-

. ranged between the pairs of levers 3.9 and 42 are alternately acting pawls 43 and :44, whichare pivoted to the upper ends Of these levers by means of transverse pinsv or pivot elements 45, also passing throughand having pivotal connection with horizontal links 46, which thus serve to pivotally connect the pair of levers39 with the pair of levers 42-. It is thus apparent that as the socket 41 is swung upwardly and downwardlythepawls 43 .and44 will bealternately moved in oppo site directions, for raising or lowering'the rack-bar 32, as will be more fully explained. The pawls 43 and 44 are adapted tocontact with the sets 0f ratchet teeth 33 and :are moved .into engagement therewith by'a re.- tractile coil spring 45, secured to pins46, formed. upon the pawls 43 and 44.

, Means are provided for controllingthe-action of the pawls 43 and 44, so that they will alternately raise and lower the rack-bar 32, comprising laterally extending pins 47 carried .by'thepawls 43 and44 and preferably formed integral therewith. These pins are arranged, as-moreclearly shownin Fig. 5., .to'contact with the upper surfaces or edges of swinging control members 48, pivotedito the face 31, as shown at 49. The upper .edges50 are provided with ITQCBSSQS5 L'tlIHS allowing the pins to move inwardly suiticiently so that thepawls can have proper engagement with the ratchet teeth, upon their up-stroke. The control members .48

are provided at their innerends with crank extensions 52, contacting with :the lower within a socket 55. It is thus apparent'that yielding means are provided to retain the control members 48 in the active position with their Ye'dges *50' approximately hori zontal.

Means are provided to lock the control members 48 in the inactive position, so that their-"edges 50 will be arranged in a lower inclined position "and practically out of contact with the pins 47, and it contacting therewith, in no way influencing theopera ti on. of .the pawls Such means; comprises a cam 55, seel igs. 5a nd9 formed upon a rock-shaft; 56, one end of which is pivoted in an opening-57 iinthejace 31, and the opposite-endis pivoted in an opening 5.8;infthe' plate 29. This rock-shaft is turned. by a crank 59irigidlysecuredthereto. ihen the crank 59 is in: an approximately horizontal position, and extending to the right, .as

shown in Fig. ,l, the-earn is -in the lower position, ;(see Fig. .5) and when this crank is swung to tlie-lleftto-assume anapproximately horizontal position, thecan is raised,

contacting with the crankextensionsr52 of i the control .members q fillus retainingithe edges 50 in lthe .loweror inactive position; The operation ot the j ack is as follows WVhen the crank 59 is moved to the,.ap proximately horizontal position tothe left, the edges 5010f the controllevers 48arein the lowermost positi'on,and doinotact upon the ipins 47 sufliciently to influence the;action of the pawls 43and .44. These pawls alternately engage the teeth 33 and:accordi ingly raisethe rack-bar32, when the j-socket 41 is swung upandzdown. Whenthecrank 59 vis swungto .the;right,:the camoo moves out of contact :with-thecrank extensions 52,

and the spring 54 and associated -,elements yieldingly retain the control members .48 .in the active position, .the edges 50 thenibeing in the uppermost position. then the socket 41 is now raised-and lowered, the pawls 43 and 44 are alternately moved-into engage.- A

ment with theiratchet teeth When the socket 41 is moved upwardly, the pawl 43 makesitsxup stroke, .towengage beneath the next ratchet tooth 32. f Thepawl 44;is-simultaneously making its down stroke, and the :pin 47 ethereof-is traveling :in contact with the "edge-50. When thewpawl 43 moves .up sufiiciently to take the entire load/10f the rack-bar 32 the yieldingly {held .controllever 48 willvact upon the :pin 47 of the pawl .44

and moves the pawl upwardly nutiofen- 'ga'gement with.the ratchet tooth {which it last :engaged. When .the socket 41 iisswnng downwardly the pawl 44 upon its uprstroke, does :not engagethis last engaged ratchet tooth but :the :next ratchet tooth thereabove, thus allowing the rack-bar to descend :for one tooth, when the ipawl143. ipartakes of its down stroke. The action-of the' pawl43 aupon ;its, upstroke is similar "to thatflof ithe described. It is thus apparent that the up and down swinging movement of the socket 41 will effect a step by step lowering movement of the rack bar It is understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim:

1. In a jack of the character described, a standard, a lift bar having slidable engagement therewith and provided upon its opposite edges with longitudinal sets of teeth, a plurality of pawls disposed outwardly of and near the opposite edges of the lift bar and connected with the standard, means to alternately raise one pawl and lower the other, control members pivotally connected with one side of the standard and extending outwardly and laterally beyond the edges of the lift bar to be arranged in proximity to the ends of the pawls, pins carried by the pawls and contacting with the control members, yielding means normally engaging the inner portions of the control members to normally retain them in the active position, and means to hold the control members in the inactive position.

2. In a jack of the character described, a tubular standard, a lift bar mounted to reciprocate within the tubular standard and provided upon its opposite edges with teeth, a plurality of pawls pivotally connected with the opposite edges of the tubular standard and arranged near and outwardly of the opposite edges of the lift bar to engage with the teeth thereof, means to alternately raise one pawl and lower the other, control members pivoted at spaced points with the tubular standard and extending laterally and outwardly beyond the tubular standard and theopposite edges of the lift bar for substantial distances, pins carried by the pawls and contacting with the control members, crank extensions carried by the inner ends of the control members and extending inwardly beyond the pivots thereof, a pressure member engaging the crank extensions to move them downwardly, yielding means to move the pressure element downwardly, and a cam pivoted to the tubular standard and disposed beneath the crank extensions to engage, therewith and move the same upwardly.

3. In a jack of the character described, the combination with a standard, including a pair of telescoping standard sections, a hollow bracket carried by one standard section and provided upon its opposite sides with key hole openings, a rock-shaft pivoted within the round portions of the key hole openings and provided at one end with a stop member and at the opposite end with a lateral extension, means to turn the rockshaft, a pawl carried by the rock-shaft and adapted to pass through one key hole opening, teeth formed upon the other standard section and adapted to be engaged by the pawl, a lift bar slidably engaging one standard section, and means to raise and lower the lift-bar.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN HOWARD GLASENER.

Witnesses LOUIS D. BARR, JULIA FOTSCH.

Copies of this patent may be obtained for five cents each, by addressing the fiommtssioner of Patents,

Washington, D. G.

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