US1111869A - Hoisting device. - Google Patents

Description

A. E. SPOONER.

HOISTING DEVICE.

APPLIOATION FILED mums, 1913.

1 1 1 1 ,869, Patented Sept. 29, 1914.

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A. E- SPOONER.

HOISTING nsvms.

APPLIUATION FILED MAR. 13. 1913. 1,1 1 1,869, Patented Sept. 29, 1914.

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ALBERT E. SPOONER, OF RENFBEW, ONTARIO, CANADA.

HOISTING DEVICE.

Specification of Letters Yatent.

Application filed. March 13, 1913. Serial No. 753,969.

To all whom it may concern." Be it known'that I, ALnnRrE. SrooNER,

a subject of the King of Great Britain, and

resident of the town of Renfrew,Provin ce of Ontario, Canada, have invented certain new and usefullmprovements in Hoisting Devices,-of which the following is a specification.

The invention relates to improvements in hoisting devices, as described in the present specification, and illustrated in the accompanying drawings that form part of the construction, which may be readily adapted for exerting a hoisting or similar power of a maximum amount with a minimum initial power. a

A further object of the invention is to particularly apply the mechanism to a lifting jack, whereby the same will'be comprised within a minimum height.

In the drawings, Figure 1 is a perspective view of the inventlon. Fig. 2 is a plan view of the invent-ion as shown in Fig. 1. Fig. 3 is a longitudinal sectional view of the invention as shown in Fig. 1. Fig. 4 is a side elevation view of the invention as apj thereof rounded, and seated 1n the socket plied to a winding drum.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings and particularly to Figs. 1, 2 and 3, 1 is a base plate having the opening 2 therethrough adjacent one end thereof.

3 are angle plates secured in parallel positionone with the other along the base plate 1 by the rivetsa.

5 are bracket plates securely riveted to the upright flanges of the angle plates 3 on the outside thereof, and having the ledge strips 6 extending along the top thereof.

7 is a top plate bridging the top of the bracket plates 5, and securely riveted at the sides thereof to the ledge strips 6, said top plate having the opening 8 therethroug'h corresponding to the opening 2 through the 29 extending through suitable orlfices 1n the base plate, said opening 8 as also the opening 2'in the base plate, having the sidelugs 9 and 10 respectively projectingtoward one another. v i i 11 is a rack having the teeth l2 andl3 formed on opposite sides thereof, and the grooves 14 on the remaining two sides- The rack 11 is inserted through the openings 8 and 2, with the lugs 9 and 10 projecting into the grooves 1 1, and forming an efiicient guide bearing on two sidesof saidrack, to insure. the proper vertlcal movement thereof through the base and top plates. '15 is a retaining dog pivotally mounted .onthe pin-16 extending through suitable orifices in the upright flanges of the angle plates 3, said retaining dog having the point thereof springheld into engagement with the .teeth13 of the rack by the spring 17 suitably arranged between the angle plates3.

18 is a finger extending outwardly from the dog 15, and by means of which'the point Patented Sept. 29, 1914..

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of the dog may be operated byhand to be swung out of engagement with the teeth 13 of the rack 11. i

19 is a dog lever pivotally supported on the fulcrum pin 20 inserted through suitable orifices in the upright flanges of the angle plates 3' adjacent the teeth 12 of the rack] The dog lever 19 has the end thereof next the teeth 12 gouged out intermediate of the width thereof to 'form the socket bearing 21, and leaving the lugs 22 formed at each n, the opposite end of .sideof said bearin' said lever being forked at 23.

24; is a lifting dog havingthe lower end bearing21 of thedog lever 19, and secured dog lever and the slot 26 in the rounded end of-said dog, whereby the lower and rounded end of said dog is at all times certain during lifting operations to rest firmly uponthe socket bearing 21. 1

26 is a flat spring secured to the dog lever 19, and bearing against the dog 24, :whereby the pointofthe same is normally held into engagement withthe teeth 12 of .the rackll. I i r l 27 is finger projecting outwardly from the dog 24;, and by means of which'the said dog may be operatedbyhand, and sprung out of engagement with the teeth 12.

28 is a fulcrum lever fulcrumed onthepin i when the hoisting. device is set in proper poweight, the rack 11 may be lowered to its upright flanges of the angle plates 2, one end of said fulcrum lever being forked at 30, and the opposite end being formed with the arm 31. y

32 is a link pivotally secured between the forked ends 23 and of the levers 19 and 28 respectively by the pivot pins 33 and 34, whereby said levers are secured one to the other for compound action. 35 is a cam lever pivotally secured between the upright flanges of the angle plates 3 the pin 36 extending through suitable orifices in said angle plates, said lever 35 having the forked cam-shaped end 37, between; which a roller 36 is pivotally mountedto bear against the arm 31 of the lever 28, and e-liminate all friction.

38 is a socket formed on the end of the lever opposite the cam end 37.

3 9 is a hand lever which may be inserted in the socket 38 to move the same up and down with a'prying movement, and thereby operate the hoisting device in the following manner The rack 11 is of course the elementwhich directly does the work of lifting, and for this purpose is provided with a cap 40 on the upper end thereof, or the said rackmay have a hook 41 pivotally secured to thelewer end thereof by the pin 42 to pnllnpwardly on any object as desired, and

sition, that is, either upon a solid foundation with the weight mounted on the cap 40, or mounted on a suitable superstructure and the hook' extending therebeneath to the extreme lowermost, position by alternately disengaging the lifting dog' 24 and retaining dog 15 as hereinbefore explained, thus allowing the rack to lower tooth after tooth, until it is imposition to properly start hoisting operations. The hand lever 39 is now operated as hereinbefore explained, where by the roller on the cam end 37 pries upon the under side of the arm 31 of the lever 28, saidlever28being so fulcrumed that a very strong downward pull is made upon the forked end. 23 of the dog lever 19, and the said dog-1 lever 19 fulcrumed as hereinbefore explained will thus exert a tremendous hoistinggfor-ce upon theend carrying the dog. 24, whereby the rackis raised a tooth and retai-nedin itselevated position by the retaining dog 15. The hand lever when raised to itsfupper position will lower the cam end fwith the arm 31 of the lever 28, thereby 0-: descriloed is shown, with the exception that raising. the forked end of the lever 19 and lowering. the dog 24 another tooth on the rack in readiness for another lift.

II-rFig. 4 the'mechanism as hereinbefore the rack is replaced by a ratchet wheel operatively connected to a winding: drum.

Referring to the said Fig. 4 the base plate es 1-i$ Shown with the angle plates 3 secured thereon as hereinbefore described, and the cam lever 35, fulcrum lever 28 and dog lever 19 are pivotally mounted therein on the pins 36, 29 and 20 respectively, as hereinbefore described, and further with the dog 24 carried at one end of said dog lever 19. 43 is a ratchet shaft rotatably mounted in the bearings 44 secured to the angle plates in a similar position to the bracket plates 5 hereinbefore described.

45 is a ratchet wheel fixedly mounted on the shaft 43, and engaged. by the dog 24 in a similar manner to the rack 11 hereinbefore described.

46 is the retaining dog operativcly engaging with the ratchet wheel 45 in a similar manner to the dog 15 with the rack 11.

47 is a spur gear fixedly mounted on the shaft 43. r

48 is a winding drum fixedly mounted on the shaft 49, said shaft being mounted in the bearing brackets 50, and having the spur gear 51 fixedly mounted thereon, and meshing with the spur gear 47.

The base plate 1 and bearing brackets are mounted on the base frame 52, whereby they are a unit in operation, and it will be readily understood that the mechanism may be used in this form to rotate the ratchet wheel, and consequently the winding drum to draw upon a cable as desired, in the same manner as the mechanism has been described for elevating the rack.

It will be further understood that any degree of size or arrangement of lever lengths or other parts may be had to secure varying lifting requirements or other uses of the power without departing from the spirit of my invention, and I do not wish to be confined to the exact construction as shown in theaccompanying drawings.

What I claim as my invention is:

1. A device for the purpose specified com prising a pair of angle plates, a rack member vertically movable between said angle plates, a retaining dog pivoted between said angle plates and engaging with said rack member, a dog lever pivoted between said angle plates, a lifting dog carried by said dog lever and engaging with said rack, a fulcrum lever pivotally supported between said plates and operatively connected to said dog lever and a hand lever pivotally supported between said plates and having a cam formed on one end thereof and operatively engaging with said fulcrum lever.

2. A device for the purpose specified comprising a base plate, a pair of angle plates secured along said base plate parallel one with the other, a guide plate supported across and above said angle plate toward one end thereof and having lug extensions from two sides of a central opening therethrough, a rack member vertically movable between said angle plates and through the fulcrum levers linked one to the other to compound the same and pivotally mounted between said angle plates on the opposite side of said rack to that engaged by said retaining dog, a springheld dog carried at one end of said fulcrum levers and engaging with said rack and a cam lever pivoted between said angle plates and operatively engaging with the opposite end of said fulcrum lever.

3. A device of the class described comprising a toothed member, a plurality of fulcrum levers compounded one with the other, one of said levers having a notched end forming a socket bearing, a springheld'retaining dog engaging with said toothed member, a springheld dog mounted in the socket bearing of one of said fulcrum levers and a cam lever operatively actuating one of said fulcrum levers.

4. A device of the class described comprising a pair of angle plates, a toothed member mounted adjacent said angle plates, a retaining dog pivoted between said angle plates and engaging with said toothed member, a dog lever pivoted between said angle plates and having one end thereof forked, a

dog carried by said dog lever at theopposite end of the fork and engaging said toothed member, a fulcrum lever pivoted between said angle plates and having one end thereof forked, a link pivotallyconnecting the forked ends of said dog lever and said fulcrum lever and a cam lever operatively engaging said fulcrum lever at the end opposite the fork thereof.

Signed at the city of Ottawa, Canada, this fourteenth day of February, 1913.

ALBERT E. SPOONER.

In the presence of- K. L. MACGIBBEN, V. BELA'NGER.

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

Washington, D. 0.

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