US1093707A - Hoisting mechanism. - Google Patents

Description

G. LAUGHRIN. HoIsTING MGHANISM.

- APPLICATION FILED JUNE 7, 1913.

1,093,707. Patented Apr.'21, 1914 2 SHEETS-SHEET 1.

G. LAUGHRIN.

HOISTING MEGHANISM.

APPLoATIoN FILED JUNE 7, 191s.

1,09 3,1707. Patented Apr. 21, 1914,

1 L NH T I wo t;

COLUMBIA PLANOURAPH C0., WASHINOTBN, D, C.

GEORGE LAUGI'IRIN, OF SAVANNA, ILLINOIS.

I-IOISIING MECHANISM.

Specification of Letters Patent.

Patented Apr. 21, 1914.

Application filed June 7, 1913. Serial No. 772,437.

To all 'Lo/0m it may concern.'

Be it known that I, Groen Lauer-nun, a citizen of the United States, residing at Savanna, in the co-unty of Carroll and State of Illinois, have invented certain new and useful Improvements in Hoisting Mechanism, of which the following is a specification.

My invention relates to hoisting` mechanism especially adapted for use in loading and unloading vehicles.

One object of the invention is to provide a device of this kind that may be easily and effectively operated manually.

Another object of the invention is to provide means whereby the parts will automatically lock in adjusted positions upon elevation of the load thereon.

A further object of the invention is to pro-` vide the device of such construction that a plurality of independently operable units between which a vehicle may pass, are employed, which units are adapted for manual operation one at a time so that the load may be raised or lowered as the case may be, by degrees.

The invention resides in the novel arrangement and combination of the several elements presented in the preferred embodi ment of the invention illustrated in the accompanying drawings.

In said drawings z-Figure 1 is a perspective view; and Fig. 2 is a side elevation, showing the parts in lowermost position.

Throughout the several views of the draw ings, like reference characters designate like or similar parts.

In practice, two of the devices are preferably employed and arranged so that a wagon or other vehicle may pass between them. Such an arrangement is shown in Fig. 1 and the two devices are generally designated A and B. Inasmuch as each of these devices is similar in construction, only one of them will be specifically described.

Referring specifically to the drawings, l

- designates supporting members in the nature of posts which may be driven into the ground, as shown. Adjacent the upper end of cach post as by means of bolts 2, are pivoted levers 3 and 4. At one end of levers 3 and 4 as by means of bolts 5, are pivoted load supporting members in the form of longitudinal beams or bars 6. At their other ends the levers 3 and 4 are pivotally connected by bolts at 7 to a connecting bar or beam 8. On one of the bolts 7 is pivoted an operating lever designated 9, and fastened thereon in any suitable manner is a bracket 10 to which is pivotally connected a link 11 in turn pivotally connected as at 12 to the lever 4. To said operating lever 9 as at 13 is pivotally connected a second link 14 connected'to a coil spring 15, which spring is connected to a link 16 pivoted as at 17 to the lever 3. Coil spring 15 through its connection with the levers 3 and 4 by means of the links 14 and 16, tends to normally move or pull said parts toward each other. On connecting bar 8 is suitably fastened a block or supporting member 18 having fastened thereto a bracket 19 affording an elongated slot through which the link 14 passes and by means of which it is guided.

Lever 4 is provided with a plurality of teeth at 20 which provide between them suitable notches with which may engage a pawl 21 pivoted by a pawl at 22 to the supporting beam 6. The teeth 20 are preferably formed by providing walls extending transversely of the lever 4, and by walls such as 23 arranged at an angle to said transverse walls. By means of this construction, when the parts are elevated, as will be more par-V ticularly set forth hereinafter, the pawl will readily slip over the teeth and engage the proper notches at the proper times. A coil spring 24 is preferably connected to the lever4 and pawl 21 serving to normally draw said pawl toward said lever to normally maintain it in engagement with the proper notch. Suitably fastened to the bar 6 is an abutment block designated 25 which is adapted to bear against one side face of the adjacent post 2 when the parts are in highest position to thus serve as a brace to prevent collapsing of the parts to lowermost position.

Suitable brackets such as 2,6 are preferably suspended from the supporting beams 6 and in transverse alinement adjacent opposite ends so that any desired beams or the like may be passed therethrough so as to eX- tend transversely of the devices.

In use, a vehicle such as a hay wagon, is adapted to pass between the devices A and B, and while halted in such position the devices suitably operate to remove the load therefrom. The hay rack is adapted to eX- tend laterally beyond the beam 6, and thus when the beams are elevated, to be supported thereby. When the wagon is thus located,

the operating levers 9, one at a time, are depressed, which depressing action through the medium of the levers 3 and 1l shifts the load supporting member vertically and causes the same to engage and lift the load. During such lifting action the pawl 2l rides over the proper teeth 20 and falls automatically into the proper notch, assisted in this action by the spring Q4. After one of the devices is thus lifted to some extent, the other one is likewise lifted, and so on in this manner until t-he load has vbeen lifted to the proper height. When the load supporting members 6 are in uppermost position, the levers 3 and l will be vertical and in this position the abutmentrmembers 25 are adapted to abut or bear against the proper post l and in conjunction withthe pawl 2l be effectively supported and braced. Of course, in the lowering of a load, the operation of the parts is just the reverse. llVhile lowering the parts the pawl 21 may be held manually out of engagement with the notches at teeth 2O in order to permit the proper d escent of the levers. `With a device of this kind I have found .that very slight leverage is necessary to effect velevation of the load, and in con` neetion with the hay rack as just described, have found that the lever can be successfully operated with one hand. In the lowermost position of the parts as best illustrated in Fig. 2, the supporting beams (i rest upon the upper ends of the post l. In this Fig. 2 the load is also shown in dotted lines, and for the sake ofi/convenience, is designated 27. Should it be found that the load was of insufficient width as to be engaged by the supporting beams G, cross bars as previously stated, may be passed through the brackets 2G. The load to be delivered onto these cross bars must of course, be suitably located and positioned on the vehicle carrying the same, passing between the devices A. and B.

Inasmueh as merelythe preferred embodiment of the invention has been illustrated and described, changes such as fall within the spirit andscope of the appended claims are reserved.

Having thus described my said invention, what I claim as new and desire to secure by Letters Patent is l. In a hoisting mechanism, a supporting member, levers pivoted thereto, means connecting said levers, one of said levers provided with a plurality of notches and means engaging said notches for holding said supporting member in adjusted position, an operating lever and means connecting said operating lever with each of said first mentioned levers.

2. In a hoisting mechanism, a supporting member, first and second levers pivoted thereto, a connecting member pivoted to said levers, said first lever provided with a plurality of notches, a pawl engageable with said notches, an operating member, and a spring fastened to said operating member and said second lever.

3. In a hoisting mechanism, ay supporting member, posts, first and second levers pivoted to said posts and to said supporting member, aconnecting` member pivoted to said levers, said first lever provided with a plurality of notches, a pawl engageable with said notches, means to normally maintain said pawl in engagement with said notch, an operating lever, a link fastened to said operating lever and said first lever and a spring fastened to said operating lever and said second lever.

4. In a hoist-ing mechanism, a supporting member, posts, first and second levers piv oted to said posts and to said supporting member, a connecting member pivoted to said levers, said first lever provided with a plurality of notches, a pawl pivoted to said supporting member engageable with said notches, a spring to normally maintain said pawl in engagement with the proper notch, an operating lever connected to said first lever, a link fastened to said operating lever and said first lever, and a coil spring fastened to said operating lever and said second lever.

5. In a hoisting mechanism, a supporting member, posts, first and second levers pivoted to said posts and to said supporting member, a connecting member pivoted to said levers, said first lever provided with a plurality of notches, a pawl pivoted to said supporting member engageable with said notches, a spring secured to said first lever and said pawl to normally maintain said pawl in engagement with the proper notch, an operating lever connected to said first lever, a link fastened to said operating lever and said first lever, a coil spring fastened to said operating lever and said second lever, supporting means for said coil spring secured to said connecting member and an abutment member secured to said supporting member and adapted to engage said posts for rigidly holding said supporting member in adjusted position.

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

GEORGE LAUGIIRIN.

I'Vitnesses ARTHUR J. GRAY,

IVM. G. Law.

Copies of 'this patent may be obtained for ve cents each, by addressing thv Commissioner of Patents. Washington, D. C.

Images