US1466784A

US1466784A - Pulling device

Info

Publication number: US1466784A
Application number: US566229A
Authority: US
Inventors: Ernest W Brautigam
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-06-06
Filing date: 1922-06-06
Publication date: 1923-09-04
Anticipated expiration: 1940-09-04

Description

Sept. 4, 1923.

E. W. BRAUTIGAM PULLING DEVICE Filed June 6, 1922 WITNESSES nvmvrog EMBmqq' GAM ATTORNEYS Patented Sept. 4, 1923.

PATENT OFFICE.

\ '1' W. BBAUTIGAM, OI COEUB DALENE, IDAHO.

runnmo omen.

To all whom it may concern." 4

Be it known that I, ERNEST W. BRAUTI- GAM, a citizen of the United States, and a resident of Coeur dAlene, in the county of Kootenai and State of Idaho, have invented certain new and useful Improvements in Pulling Devices, of which the following is a specification.

This invention relates in general to pulling devices, and more particularly to an improved lever chain pulling device.

The object of the invention is to provide a device of this character wherein a single strand of chain is used and is controlled in such a manner as prevent tangling thereof and which at the same time is positively driven from the lever in such manner as to exert a powerful pull.

Another object is to provide a device of this character which is automatically reversible and which at any time may be so actuated by the operator as to slacken on the chain.

Another object is to provide a device of this character which is of simple and durable construction, reliable and positive in operation and easy and comparatively inexpensive to manufacture.

Other objects and advantages of the invention reside in certain novel features of construction, combination and arrangement of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming part of this specification, and in which:

Figure 1 is a view of an embodiment of the invention in side elevation, and showing the parts thereof positioned as in one phase of the operation;

Figure2 is a similar view, showing the parts of the invention positioned as in another phase of the operation; 7

Figure 3 is a view in transverse vertical section; and

Figure 4 is a detail perspective view.

Referring to the drawings wherein for the sake of illustration is shown the preferred embodiment of the invention, the numeral 10 designates generally a frame made up of side bars 11 and an end bar 12. A sheave 14 is arranged between the side bars 11 of the frame and is loosely mounted on an axle 15 journaled in bearings provided therefor in the side bars of the frame. In the periphery of the sheave an annular groove 16 1s formed 1822. Serial No. 588,228.

pockets 17 receiving the lower portions of the vertically disposed links of the chain whereby the winding sheave has positive drlvin engagement with the chain. end 0 the frame which is opposite the end bar 12 a guide pulley 19 is provided and is mounted upon a pintle 20 journaled in the side bars of the frame. As shown in the drawings the chain C is trained under the gulde pulley and then up and around the winding sheave.

A lever 21 is provided and includes arms 22 spanning the winding sheave 14 and pivotally mounted or fulcrumed intermediate their ends upon the axle 15. A socket 23 is provided in the upper end of the lever 21 and receives an operating bar or handle 24; whereby the lever may be actuated.

A driving pawl 25 is pivotally mounted upon the arms 22 of the lever above the winding sheave 14 and coacts with ratchets 26 formed upon the rims of the winding sheave 14:. A spring pressed locking pin 27 carried by the lever is provided with beveled surfaces 27 and engages a triangularly shaped corner 28 of the tail of the pawl 25 to releasably maintain the pawl in or out of engagement with the ratchet 26 as the case may be.

Means is provided for preventing retrograde movement of the winding sheave and includes a detent 30 pivotally supported, as at 31, u on the side bars of the frame and engagea 1e with the ratchet teeth 26. The detent is releasably held in engagement with the ratchet teeth or out of engagement therewith by means of spring pressed locking pins 32 carried in the sockets 33 provided therefor upon theframe and having beveled surfaces 32- engageable with the triangularly formed rear end of the tail of the detent 30, as at 34.

Above thedetent 30 the side bars of the frame 10 carry a pair of camming lugs 35 cooperable with the pawl 25 as will be hereinafter more fully described and adjacent the 'de ,pulley 19 a second pair of such cam. ugs, designated at 36 is provided, and these cam lugs are engageable with a corner 25 of the tail of the ratchet as will be hereinafter fully described. The lower ends of the arms 22 of the levers carry a pin 38 At the which extend between and is secured to the arms and is coo rable with the detent 30 for a purpose w 'ch will hereinafter more fully ap ear. 7 A

A hoo 40 affords a ready means whereby the frame may be connected with a re bar or the like so as to fix or anchor t 0 frame.

In operation, in tightening up or in pulling the chain C, the operator oscillates the lever 21 through the handle 24. When the lever 21 moves in a clockwise direction as viewed in Figure 1, the driving pawl 25 has driving engagement with the ratchet-s 26 and rotates the winding sheave 14 in a clockwise direction thereby tightening up on the pulling chain C. When the lever is rocked or moved in a counterclockwise direction as viewed in Figure 1, the driving pawl 25 travels idly over the ratchets 26 but the winding sheave is held against retrograde movement by the action of the detent 30.

When it is desired to slacken the chain or let the same out, it is only necessary for the operator to rock the lever 21 to the extreme right as viewed in Figure 1 so that the driving pawl 25 will engage the detent 30 and throw it out of engagement with the ratchets 26. The movement of the detent 30 to position out of engagement with the ratchet 26 is at first against the action of the looking pins which must be pressed inwardly to accommodate this movement of the detent and which snaps outwardly to releasably lock the detent out of engagement with the ratchet 26. The lever with its driving pawl engaged with the ratchets of the winding sheave is then moved in a counterclockwise direction as viewed in Figure 1, to pay out or slac-ken the cable and the lever 21 is so moved until it occupies an extreme left-hand position, as shown in Figure 2. In moving to this position, the pin 38 engages the detent 30 and throws it back into engagement with the ratchets of the winding sheave in which position it is then held by the spring pressed locking pin 32. Consequently when the triangular corner 25 of the driving pawl 25 engages the camming lug 36 to move the driving pawl out of engagement with the ratchet teeth the winding sheave is held and may not freely spin to entirely slacken or unwind the cable. The locking pin 27 holds the driving pawl out of engagement during the return movement of the driving pawl in a clockwise direction until it approaches the extreme right-hand position, as viewed in Figure 1, at which time the pawl 25 engages the camming lugs 35 to throw the driving pawl back into engagement with the ratchet. At this time the parts are so positioned that the device may immediately thereafter carry out either winding or unwinding of the chain. If furthfll unwinding or slackening is desired the lever is moved still further to the right as viewed in Figure 1, so that it will a ain kick out the detent 30 and leave the s eave 14 solely to the control of the driving pawl. If it is desired to tension or wind up the chain or cable the lever is not moved so far to the right as viewed in Figure 1 as to kick out the detent, 30 but is only so moved until the drivin pawl is returned into engagement with the ratchets 26 and it is then moved to the left or in a counterclockwise direction as previously described.

It is to be noted that the pin 38 functions not only to throw the detent 30 back into engagement with the ratchets when desired but also functions to further driving engagement of the chain and winding sheave for, as clearly indicated in Figure 1, the chain C is trained under the pulley 19 over the winding sheave and then around the pin 38.

I claim:

1. In a pulling device, in combination, a frame, a winding sheave supported thereby, a lever, a driving pawl carried by the lever and cooperable with the winding sheave for driving the same, means carried by the frame and cooper-able with the pawl for shifting the pawl into engagement with the winding sheave or out of engagement therewith, yieldable means carried by the lever for releasably holding the pawl in engagement with the winding sheave or out of engagement therewith, a detent for preventing retrograde movement of the winding sheave, the driving pawl being engageable with the detent to throw the same out of engagement with the winding sheave, yieldable means for releasably holding the detent in engagement with the winding sheave or out of engagement therewith, and means carried by the lever and adapted to be engaged with the detent for moving the same back into en gagement with the sheave.

2. In a pulling device of the character described, a winding sheave having ratchet teeth, a lever, a pawl carried by the lever and engageable with the ratchet teeth of the sheave, a detent engageable with the ratchet teeth of the sheave for preventing retrograde movement thereof, yieldable means for re leasably holding the detent in engagement with the ratchet teeth or out of engagement therewith, said driving pawl being engageable with the detent while itself engaged with the ratchet teeth for disengaging the detent from the ratchet teeth whereby the movement of the sheave in either direction maylbe controlled by said lever and driving aw p 3. In a pulling device of the character described, aframe, a winding sheave rotatably mounted upon the frame and having ratchets, a lever fulcrumed upon the frame, a driving pawl pivotally mounted upon the winding sheave, a spring pressed pin for releasably holding the driving pawl in engagement with the ratchets or out of engagement thereof, camming lugs carried by the frame and engageable with the driving pawl for controlling its engagement with the ratchets, a detent pivotally mounted upon the frame and engageable with the ratchets for preventing retrograde movement of the winding sheave, a spring pressed locking pin engageable with the detent for holding it in engagement with or out of engagement with the ratchets, said detent being controllable as to its engagement by said driving pawl.

4. In a pulling device, a frame including side bars and an end bar,-an axle supportedupon the side bars of the frame, a winding sheave arranged between the side bars of the frame a and loosely mounted upon 7 the axle, a lever including spaced arms spanning the winding sheave and pivotally mounted upon the axle so as tobe fulcrumed uponthe frame, a driving pawl pivotally mounted upon the lever, said winding sheave having ratchets cooperable with said driving pawl, a'detent pivotally mounted upon the frame and cooperable with the ratchets for preventing retrograde movement, the detent being adapted to be thrown out of engagement with the ratchets by said driving pawl, and a pin carried by the arms of the lever 'for throwing the detent back into engagement with the ratchets and a spring pressed locking pin for releasably holding the detent in engagement with the ratchets or out of engagement with the ratchets.

5. In a pulling device, in combination, a frame, a winding sheave carried by the frame, a lever, a driving pawl carried by the lever and engageable with the winding sheave for driving the same, camming lugs carried by the frame for controlling engagement of the driving pawl with the winding sheave, a detent for preventing retrograde movement of the winding sheave, the

detent being adapted to be thrown out of engagement with the winding sheave by said driving pawl, and means carried by the lever for throwing the detent back into engagement with thewinding sheave.

6. In a device of the character described, a winding sheave, a lever, a driving pawl carried by the lever and cooperable with the driving sheave, means controlling the engagement of said pawl with said winding sheave, a detent for preventing retrograde ment with the winding sheave by the 'driving pawl, and means carried by the lever for moving the -detent back into engagement with the winding sheave.

ERNEST W. BRAUTIGAM.