US1888389A - Pulling device - Google Patents

Description

Nov 22, 1932.

Filed Aug; 12, 1951 D. KREMKO PULLING DEVICE ."nu H "nun-m a 31mm 2 Sheets-Sheet 1 gwuwtoc Ea nz'el Krem/ro I Cllihnwu D. KREMKO PULLING DEVICE Nov. 22, 1932.

Filed Aug. 12, 1931 2 Sheets-Sheet F gmento a .Z7a12 z'el Aremko d komq Fatentecl Nov. 22, 1932 UNITED STATES.

PATENT OFFICE DANIEL KREMKO, F DETROIT, MICHIGAN, ASSIGNGR OF ONE-THIRD T0 JOHN H. MITCHELL, 0F NORTHAMPTON, PENNSYLVANIA PULLING DEVICE Application filed August 12, 1931.

The present invention relates to improvements in pulling devices and has reference more particularly to a device for pulling together broken conveyorlines, machine belts, stretching fences and the like One of the important objects of the present invention is to provide a puller of the above mentioned character that includes a double pawl and ratchet arrangement with which cooperates the double acting lever.

Another important object is to provide a puller of the above mentioned character that will at all times be positive and elficient in its operation the same being further simple in construction, inexpensive, strong and duraable and further well adapted to the purposes for which it is designed.

Other objects and advantages of the present invention will become apparent when taken in connection with the accompanying drawings:

In the accompanying drawings wherein 1i :e reference characters designate corresponding parts throughout the several views:

Figure 1 is a side elevation of the puller embodying my invention.

Figure 2 is a sectional view through the lever for more clearly disclosing the pivoted pawls and the actuating means associated therewith.

Figure 3 is a transverse section taken approximately on the line 3-3 of Figure 1 looking downwardly.

Figure is a similar section taken approximately on the line ll of Figure 1 also looking downwardly.

Figure 5 is a top plan view of the puller.

Figure 6 is a side elevation of the puller showing the same in use for stretching broken conveyor chains, and

Figure 7 is a similar view showing the puller in use for stretching or pulling together the ends of a machine belt.

In the drawings, wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numerals 1 and 2 designate upper and lower ratchet bars having the ratchet teeth 3 and 4 formed in the outer edges thereof. These ratchet bars are maintained in spaced relation with respect to Serial No. 556,706.

each other through the medium of the connecting plates 5 that extend across the end portions of the bars and are secured thereto in the manner as clearly shown in the drawings.

A link or pole bar 6 is secured at its inner end between one pair of plates 5 at one end of the inter-connected ratchet bars 1 and 2, the outer end of this bar 6 being adapted to be connected to one portion of a member that is to be pulled. Slidably arranged between the rack bars 1 and 2 and movable through the other pair of plates is the draw-bar 7, the outer end of this draw-bar being also adapted for connection to the other end of the member that is to be pulled or stretched.

The puller further includes a lever that is designated generally by the numeral 8. This lever includes a handle portion 9 and a shank 10 and secured on opposite sides of the shank 10 are the plate-like portions 11, the upper ends of these plate-like portions being en larged and being disposed on opposite side faces of the ratchet bars 1 and 2. The enlarged upper ends of the plate-like portions 11 constitute what I term heads 12. The lower end portions of the plates 11 are fixedly attached to the shank 10 by the securing means indicated at 18.

The inner end of the draw-bar 7 is disposed between the spaced head portions 12 and is pivotally connected thereto as at 14. The upper ends of the head-like portions 12 project above the ratchet teeth 3 formed in the upper edge of the upper rack bar 1 and pivotally mounted intermediate its ends between the upper end portions of the heads 12 is the upper pawl 15 that cooperates with the upper ratchet teeth 3, the pivotal support for this pawl being indicated at 16.

Coacting with the lower ratchet teeth 4 is the lower pawl 17 that is also pivotally mounted between the head portions 12 below the lower rack bar 2 as at 18. These pivoted pawls are normally maintained in engagement with the respective ratchet teeth through the medium of links 19 and 20 that are pivoted at their inner ends between the intermediate portions of the plate-like members 11 as at 21, the outer ends of these links being pivotally connected to the pawls 15 and 17 through the medium of the rods 22 and 23, respectively, the lower ends of these rods being connected 7 to the outer ends of the respective links. Suitable springs 24 are connected at their upper ends to a pin 25 and at their lower ends to the intermediate portions of the links 19 and 20 as clearly shown in Figure 2.

From the construction above described and shown in the drawings, it will be readily obviousvthat when the handle 9 of the lever 8 is actuated, the pivotal pawls will cooperate with the ratchet teeth to effect the inward sliding movement of the draw-bar 7 thus causing the parts to which the puller is connected to be drawn together, This mechanism will afi'ord a pulling action in a quick and eflicient manner the lever 8 is double acting in that the pawls cooperate with. the re spective ratchet bars in a step by step manner so that upon each pull and push of the lever, the draw-bar will be moved toward the non-movable bar or link 6.

For the purpose of releasing the pawls from the ratchet teeth, in order to return the movable parts to their normal positions, I pro vide an auxiliary pair of levers or finger pieces 26 and 27 that are pivotally secured to the handle 9 directly below the plate-like portion 11. A rod 28 operatively connects the upper end of the finger piece 26 with the intermediate portion of the link 19 while a similar rod 29 operatively connects the other finger piece 27 with the intermediate portion of the link 20. Suitable guards 8i) enclose the intermediate portions of: these rods and it is readily obvious that when the finger pieces are actu ated, a downward pull will be exerted. upon the links 19 and 20 causing the free ends of the pivoted pawls to be disengaged from the ratchet teeth whereupon the lever 8 may be moved along the ratchet bars 1 and 2 toward the right to again extend the draw-bar 7 to its initial position.

Upon releasing the finger pieces 26 and 27,

' the coil springs 24 will return the pivoted pawls into engagement with the respective ratchet teeth so that when the lever 8 is again actuated the pawls will cooperate with the ratchet teeth to move the draw-bar toward the left for stretching or pulling purposes.

In Fi re 6 of the drawings, I have illustrated t e puller as being used in the act of stretching a broken conveyor chain while in Figure 7, the puller is illustrated as being used for ulling together the adjacent ends of a mac ine belt. In the latter instance, suitable belt clamping means designated generally by the numeral 31 is attached to the outer ends of the bars 6 and 7 respectively.

It will thus be seen from the foregoing description that I have provided a puller that will at all times be positive in its operation and due to its simplicity, the same can be manufactured at a very low cost.

While I have shown the preferred embodiment of the invention, it is to be understood that minor changes in the size, shape and arrangement of parts may be resorted to with out departing from the spirit of the invention and the scope of the appended claim.

Having thus described the invention what is claimed is:

In a puller, a pair of spaced ratchet bars having ratchet teeth formed in the outer edges thereof, pairs of plates inter-connecting the ends of the ratchet bars, a non-movable drawbar connected at its inner end between one pair of plates, a movable draw-bar slidable between the ratchet bars and through the other pair of plates, an operating lever including a shank and a handle at the lower end of the shank, a pair of plates secured on the opposite sides of the shank, the upper ends of the plates being disposed on opposite sides of the ratchet bars, upper and lower pawls pivotally supported between the plates for engagement with the ratchet teeth of the respective ratchet bars, the inner end of the movable draw-bar being pivotally connected between the upper portions of the said plates, a pair of links pivotally supported at their inner ends between the plates below said pawls, rods connecting the outer ends of the links with the respective pawls, spring means associated vith the links and the lever for normally holding the pawls in engagement with the respective ratchet bars, and additional means on the lever for releasing the pawls from crgagement with the ratchet teeth.

In testimony whereof I ail-ix my gnature.

DANIEL KREMKO.

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