US1481676A

US1481676A - Auto jack

Info

Publication number: US1481676A
Application number: US635652A
Authority: US
Inventors: Dealey F Bishop
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-04-30
Filing date: 1923-04-30
Publication date: 1924-01-22
Anticipated expiration: 1941-01-22

Description

Jan. 22 1924.

D. F. BISHOP AUTO JACK Filed April 30, 1923 2 Sheets-Sheet 1 Jan. 22, 1924. 1,481,676

D. F. BISHOP AUTO JACK Filed April 30, 1923 2 Sheets-Sheet 2 a base-1 and provided at diametrically oppo- Patented Jan, 22, 1924.

entree STATES DEALEY IE. BISHOP, OF GREENVILLE, TEXAS.

AUTO JACK;

Application filed April 30, 1923. Serial No. 635,652.

,To all w 710m it may concern be quickly lowered without a sudden drop by the use of a single handle only.

Another object is to provide a tool of this character which is simple, small and light, having a removable handle to enable it to be packed in a small tool box.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it, being understood that changes in the precise embodiment of the invention herein disclosed may be made without departing from the spirit of the invention. J r

In the accompanying drawings Figure 1 represents a side elevation ofa jack constructed in accordance with this invention with the parts in the positionassumed for lifting a load, the handle being broken oil? for convenience in illustration.

Fig. 2 is a longitudinal vertical section through the pedestal with thecoacting parts shown in side elevation and the parts in the position assumed when lowering the jack. Fig. 8 is a transverse section takenon' the line 33 of Fig. 2. 1

Fig. 4 is a top plan view, and I Fig. 5 is "a section on the line 5- 5. of Fig. 2. I 1

In the embodiment illustrated, a hollow standard or pedestal 2 is shown rising from site sides with ratchet teeth 3 arranged to resistdownward movement of cooperating pawls or dogs 6 and 7. The teeth 3 onone side are arranged in staggered relation to those on the opposed side. The dogs are pivotally attached at their ends to an'operating lever 10 which is fulcrumedat a lifting head 15 carried by-a lifting or guide rod 16 mounted for vertical movement in'the pede estal 2. The upper end of the lifting head 15 is made concave and serrated as shown at 17 to facilitate its engagement with a vehicle axle or other object to be lifted.

The lever 10 is bifurcated at its fulcrum end and straddles the head 15, the dogs 6 and 7 being pivotally connected at their upperends between the furcations.

The lever 10 has a reduced extension 11 at itsouter end which telescopically engages a removable handle 12. This handle 12 may be of any suitable or desired lengthsuflicient to provide the necessary leverage and is removable to. enable the jack to be stored in a small tool box.

Keepers 13 extend longitudinally of the outer face of the furcations of the lever and raters: PATENT oFF ca.

are secured thereto by riveting or otherwise and form guides for

auxiliary dogs

14 and 14*, one of which is pivoted at one end to one of the first mentioned dogs near its upper end, and the other to the opposed face to the other dog. These dogs 1a and 14 extend through the keepers 13 and are pro vided near their free ends withteeth or shoulders 18 and intermediate their'ends with notches 19, which latter notches are de signed to be engaged by crank arms 21 and 22 of a crankshaft 20 extended transversely through the lower port-ion of the head 15 and which are designed to hold the dogs ltiand 14 with their shoulders disengaged from the studs 23 projecting laterally from the lever near opposite endsof the. V

keepers 13. I

Coiled springs 24 and 25 yieldably connect the inner ends of the dogs 14: and 14 with the dogs 6 and 7 respectively, whereby when the crank 20 is released from said dogs, they will be moved into engagement a with the studs 23"and yield-ably held engaged therewith.

The dogs 6 and '7 are yieldably connecied by springs 26 and 27 which are exactly alike and are here shown V-shaped with coils 28 formed at their apices) These springs tend.

to move the dogs 6 and 7 toward each other and to hold them in engagement with the racks formed on opposite sides of the pedestal.

-Finger' grips 29 in the form of buttons or knobs are secured to the outer faces of the dogs '6 and '7 in advance of the springs which connect them and are designed for releasing the dogs manually.fromtheratchet.

teeth on the pedestal when desired.

The pedestal 2 is provided along opposite edges of the ratchet teeth thereof with flanges-8 and 9which form guides for the free ends of the dogs 6 and 7 to prevent the dogs from slipping laterally off the ratchet when in operation.

In the use of thisjack, the parts beingin the position shown in Fig. 1, the raising and lowering of the lever 10 by means of the handle 12 will operate to alternately engage the dogs 6 and 7 with the ratchet teeth 3, thereby quickly lifting the head 15 and when engaged with the load, operates to hit the load to the desired extent.

When it is desired to let down or lift the head 15 and the load carried thereby, the upper or auxiliary dogs let and 14 are tripped to disengage them from the cra 'n; arms of the crank shaft 20 and theh'andle 12 is raised until the first upper dog into place and the dogs 6 and 7 may !"l:u be moved downward stepby step to the load. When it is desired to lower the jack, a few inches only, the upper toga are not dropped, but the weight is n't'ted from one of the lower dogs and the highest lower dog is moved manually outwarc. by grasp ing the knob 29 carried thereby.

It is of course understood that the of this jack may he made of any suitable strong material, the pedestal and base bei preferably of iron, but the dogs should be at good cast-steel.

From the above description it will be. ohvious that this jack may be quickly applied and removed and owing tothe double stroke thereof, will lift the load in a rapid manner and thatsaid load may be lowered quickly in the manner above set forth.

When the ack is not in use, the handle 12 isremoved fromits engagement with lever 10 and it may be stored in a comparatively small space.

Various changes in the form, shape, proportion and other minor details of construction may be made without departing from the principle or sacrificingany of the advantages of the claimed invention.

1. In a lifting jack, a fixed member, a. member movable vertically in -said fixed member, and provided with a head atits upper end, an operating lever fulcrumed intermediate its ends on said head, racktceth carried by said fixed member, a pair of pawls pivoted. to said lever on opposite sides of the fulcrum and depending therefrom, a spring connecting said pawls to hold their free ends normally in contact with said teeth, means whereby said pawls will alternately engage said teeth to cause the movable member to ride upwardly, and means to permit lowering of the pawls by skipping a plurality ofteeth on each stroke.

2. In a lifting jack :1- stationar upright column with rack teeth on its opposed faces those of one rack alternating with those of the other, a movable column mounted on said stationary column, an open lever fulorumed on said movable column, a pair of pawls depending from said lever on opposite sides of its fulcrum and adapted to en gage said rack, yielding means tending to forcesaid pawls into engagement with said racks to provide for the upward movement of the pawls and the movable column on the rocking of the lever, and reversing means carried by said pawls and cooperating with-saidlever to alternately disengage said pawls from the racks.

3. In a lifting jack a hollow stationarv upright column provided with a pair of v racks having outwardly facing teeth on its opoosite side, the teeth of one rack being arranged in staggered relation with those of the other rack, a vertically movable column mounted in said stationary column and having an article engaging head. an operating lever straddling and fulcrumed t9 said head, a pair or" main pawls pivoted to and depending from said lever on opposite sides of the column, and adapted to engage said rack. yielding means to force said pawls into engageinent with said racxs and providing for the upward movement of said pawls and the movable column in respoi'lse if) movements of said operating lever, auxiliary pawls caried by each of said main pawls. pins on said lever for engagment by said aaxilia v pawls, and a crank shaft carried by said head to engage said auxiliar Y pawls and hold them out of engagement with said pins during the upward movement of the movable column.

eL'In alifting jack a hollow stationary upright column provided withapa'ir of racks having outwardly facing teeth'on its opposite side, the teeth of one rack being arranged in staggered relation with those of the other rack, a vertically movable column mounted in said stationary column and having an article engaging head, an operating lever straddling and fulcrumed to said head. a pair of main pawls pivoted to and depending from said lever on opposite sides of the Column, andadapted to engage said rack, yielding means to force said pawls into engagement with said racks and providing for the upward movement of said pawls and the movable column in response tomovement of said operating lever, auxiliary pawls carried by each of said main pawls, pins on said lever for engagement by said auxiliary pawls, and a crank shaft carried by said head to engage said auxiliary pawls and hold them out of engagen'ient with said pins during the upward movement of the mova ble'column, said pins operating as fulcrums for the main pawls during the lowering of the movable column.

5. Inalifting jack an upright stationary column provided on its opposed faces with a pair of racks the teeth of one alternating with those of the other, a column movable vertically relative to the stationary column and supported thereby, a lever fulcrumed on said movable column, a pair of main pawls pivoted to and depending from said lever on opposite sides of the columns, and adapted to engage said racks, yielding means to force said pawls into engagement with said rack, auxiliary pawls pivoted at one end to said main pawls below the pivotal connection of the main pawls with the lever, said auxiliary pawls facing in opposite directions, said auxiliar pawls having notches in their free'ends, pins on said lever for engagement by the notched ends of said pawls when the vertical column is to be lowered, said auxil iary pawls having notches in their lower edges intermediate their ends, and a crank shaft to engage said intermediate notches when the'movable column is to be raised, thereby disengaging the notches or" the said auxiliary pawls from said pins.

6. In a lifting ask an upright stationary column provided on its opposed faces with a pair of racks the teeth of one alternating with those of the other, a column movable vertically relative to the stationary column and supported thereby, a lever fulcrumed 011 said movable column, a pair of main pawls pivoted to and depending from said lever on opposite sides of the columns, and adapted to engage said racks, yielding means to force said pawls into engagement with said rack, auxliary pawls pivoted at one-end to said main pawls below the pivotal connection of the main pawls with the lever, said auxiliary pawls facing in opposite directions, said auxiliary pawls having notches in their free ends, pins on said lever for engagement by the notched ends of said pawls when the vertical column is to be lowered, said auxiliary pawls having notches in their lower edges intermediate their ends, and a crank shaft to engage said intermediate notches when the movable column is to be raised, thereby disengaging the notches of the said auxiliary pawls from said pins, and coiled springs for connecting said auxiliary pawls with said main pawls.

7. In a lifting jack of the class described a stationary upright column having racks on its opposed faces, a vertically movable col umn on said stationary column and having a head at its upper end, a lever tulcrumed on said head, main pawls pivoted at one end to said lever on opposite sides of said head, yielding means to force said pawlsinto engagement with said racks, auxiliary pawls pivoted at one end to said main pawls below their pivotal connection with said lever, cooperating means carried by said auxiliary pawls and said lever and head respectively whereby the auxiliary pawls may be alternately actuated for raising and lowering the main pawls.

In testimony that I claim the foregoing as my own, I have hereto affixed mysignature in the presence of two witnesses.

DEALEY F. BISHUP. Witnesses J. H. (1001;, C. T. Coon.