US919731A

US919731A - Lifting device.

Info

Publication number: US919731A
Application number: US40293807A
Authority: US
Inventors: Frank B La May
Original assignee: American Chemical Manufacturing & Mining Co
Current assignee: American Chemical Manufacturing & Mining Co
Priority date: 1907-11-19
Filing date: 1907-11-19
Publication date: 1909-04-27
Anticipated expiration: 1926-04-27

Description

F. B." LA MAY.

LIFT-ING DEVICE. APPLICATION III-ED NOV. 19, 1907.

,Patenlqed Apr; 27, 1909.

' 'FIG'A.

INVENTOR c 4 1 Q 0.. wnsnmmu. a. c.

- or ro FRANK B. LA MAY, OF ROCHESTER, EW-YO K, Assle'noR 'ro AMERICAN CHEMICAL MANU* FACTURING & MINING COMPANY, OE RoCHEsTER, NEW YORK, A CORPORATIONOF NEW YORK. r

LIFTING DEVICE.

Specification of Letters Patent. Patented April 27, 1909.

Application filed November 19, 190?. Serial No. 402,938.

To all whom it may concern: 7

Be it known that I, FRAN K B. Ln MAY, a

citizen of the United States, and resident of.

Rochester, in the county of Monroe and State 0 of New York, have invented certain new and useful Improvements in Lifting Devices, of

which the following is a specification.

This invention relates to lifting devices, and has for itsobjec t to produce a-simple and efficient mechanisnnand which may b easily operated by one hand. i V

The invention consists in the apparatus hereinafter described and claimed. 1 1

In the drawings: Figure 1 is a side elevation of the device; Fig. 2 is a rear View thereof; Fig. 3 is an enlarged view of a detail; and Fig. 4 is a perspective view illustrative of the mode of using the device.

The device comprises a handle 1', of any desired length, carrying a pair of curved jaws 2 at its upper end, and having at its: lower end means for moving the ends of said jaws toward or away from each other. The jaws 2 are pivoted 3. ma post 4' which may form part of a metal ferruleo on the upper end oftthe handle 1. The jaws 2 have extensions 6 beyond the'pivot 3,to which links 7' are attached. The lower ends of said links take into a hook S on the upper end of a rod or wire 9 which is guided in staples or eyes 10 on the handle 1. A coiled tension spring 11 is also fastened at one end to said hook S, and at the other end to a hanger 12 depending from the pivot Said spring, together with the links 7, constitutes means for opening the jaws 2 after-the device has been used. a

On the lowerend of the handle 1. is pivoted a yoke-shaped lever 13, from which ex tends an arm 14. The lever 13 Carries latch means for holding the j aws closed. The lever 18 has pivoted in it at 1am latch 15, the upper end 16 of which-is adapted to engage a toothed rack 17 that isfastened to the handle 1 (Fig. 1). The rod or wire 9 is hooked into an extension 18 of the latch 15, and the continuous tensionof the'spring 11 therefore tends to hold the end 16 of said latch in engagen'ientwith the rack 17.

Suitable gripping pieces are provided at the extremities of the jaws 2, for the purpose of engaging and holding the article to be removed from a high shelf. In the present instance curved pieces 19 are shown, and they are spring'controlled and are flexibly connected to the jaws 2. Each piece-19 is fixed to one end ofa fiat spring 20, whose other end is riveted to a head 21 on the extremity of the jaw 2 (Fig. 3) so that it is tiltable in all directions on the jaw. Rubber pads 22 may be attached to the inner faces of the The springs 20 permit the gripping pieces .to adjust themselves to the surface contour of various articles and also always tend to move the gripping pieces automatically to a definite or normal position and to returnthem automatically to such normal position after use.

Fig. 4: shows clearly the operation of the device; The jaws 2 being normally spread to the position shown by full lines in Fig. 2, the operator'grasps the handle 1, resting the forefinger upon the latch 15, and the third, fourth and fifth fingers upon the lever 14. Placing i the device so that the jaws 2 are on opposite sides of the article on the shelf, the third, fourth and fifth fingers may be contracted, thus pulling the lever 14 toward the handle 1, and nioving'the latch downward along the ratchet rack 17 to the position shown in dotted linesin Fig. 1. By this movement "the rod 9 is moved downward, carrying with itthe links 7 against the action of the spring 11, and bringing the jaws 2 toward each other at their outer ends, as indicated by dotted lines in Fig. 2 The gripping pieces 19 engage the article upon the shelf, and are prevented from springing apart again by the engagement of the latch-end 16 with the rack 17. To release the article from the device, it is only necessary to press the forefinger upon the latch 15, releasing it from the rack 17, and then the spring 11 may contract and pull the links 7 upward. moving the jaws 2 into the normal or open position. It is clear that the gripping pieces 19 in grasping a cylindrical object are capable of turning around a line or axis which is transverse to the plane of movement of the movable jaw 2, and this would be true even if one of the jaws should be come fixed.

What I claim is v 1. In a lifting device, the combination of a handle, two jaws pivoted to the handle, spring means for opening the jaws, self-ad justing gripping pieces flexibly connected I to. the ends of the jaws, a lever pivoted on pieces 19 to afford a firmer grip than could be obtained by the metal pieces 19alone;

the handle for operating the aws, and connecting means between said lever and said jaws.

2. In a lifting device, the combination of a handle, two jaws pivoted to the handle, spring means for opening the aws, a spring on each jaw attached thereto at one end, a gripping piece attached to the other end of each spring, a lever pivoted on the handle for operating the jaws, and connecting means between said lever and said jaws.

3. In a lifting device, the combination of a handle, two jaws pivoted to the handle, spring means for opening the jaws, a flat spring on each jaw attached thereto at one end, a gripping piece attached to the other end of each spring, a lever pivoted on the handle for operating the jaws, and connecting means between said lever and said jaws.

4. In a lifting device, the combination of a handle, jaw mechanism carried by the handle, means tending to open thejaw mechanism, a lever pivoted to the handle for operating said jaw mechanism, an automatic latch on the lever, a rack on the handle for engaging the latch, and a connection from the lever to the jaw mechanism.

5. The combination of a handle, two movable jaws pivoted to the handle, two links one connected to each jaw, a spring connected to the links and to the handle for opening the jaws, a latch arm pivoted on the handle for closing the jaws, a rack on the handle for engaging the latch arm, and connecting means from the latch arm to the links.

6. The combination of a handle, two mm able jaws pivoted on the handle, two links, one connected to each jaw, a latch arm pivoted on the handle, a rack on the handle for engaging the latch arm, connecting means from the latch arm. to the jaws, and a spring for opening the jaws connecting the handle and said connecting means.

7. A handle, two movable jaws pivoted on the handle, a spring for opening the jaws, an arm pivoted on the, handle, a latch pivoted on the arm, a. rack on the handle for engaging the latch, and connecting means from the latch to the jaws.

8. A handle, two movable jaws pivoted to the handle, two links, one connected to each jaw, an arm pivoted on the handle, a latch pivoted on the arm, a rack on the handle for engaging the latch, a connection from the latch to the links, and a spring for opening the jaws attached to said connecting means and to said handle.

9. In a lifting device, the combination of a handle, two jaws carried by the handle, spring means for opening the jaws, selfadjusting gripping pieces flexibly connected to the ends of the aws, and manual means for closing said jaws.

10. In alifting device, the combination of a handle, two jaws carried by the handle. spring means for opening the jaws, a spring on each jaw attached thereto at one end. a gripping piece attached to the other end of each spring, and manual mains for closing said jaws.

11. In a lifting device, the combination of a handle, two jaws carried by the handle. spring means for opening the aws, a flat spring on each jaw attached thereto at one end, a gripping piece attacheu to the other end of each spring, and manual means for closing said jaws.

12. In a lifting device, the combination of a handle, jaw mechanism carried by the handle, means for autonuitically opening the jaw mechanism, gripping pieces attached to said jaw mechanism and universally and automatically adjustable to objects grasped thereby, and manual means for closing said jaw mechanism.

13. In a lifting device, the combination of a handle, jaws carried by the handle, auto matic means for opening the jaws, a hand lever for operating the jaws, a latch carried by said lever for locking the jaws and movable in the same direction as the lever for release, a rack on the handle for the latch. and a connection to the jaws.

1a. In a lifting device, the combination of a handle, jaw mechanism carried by the handle, means for automatically opening the jaw mechanism, one or more gripping pieces attached to said jaw mechanism and tiltable around an axis transverse to the plane of movement of the jaw mechanism and thereby automatically adjustable to objects grasped thereby, and manual means for closing said jaw mechanism.

15. In a lifting device, the combimition of a handle, jaw mechanism carried by the handle, means for automatically opening the jaw mechanism, one or more gripping pieces attached to said jaw mechanism and tiltable around an axis transverse to the plane of movement of the jaw mechanism and thereby automatically adjustable to objects grasped thereby, a hand lever pivoted to said handle, a latch carried by said lever, a rack on the handle for the latch, and a connection to said jaw mechanism.

16. In a lifting device, the combination of a handle, jaws carried by the handle, gripping pieces carried by the jaws and tiltable around an axis transverse to the plane of movement of the jaw mechanism and comprising means for moving the gripping pieces automatically to a normal position to permit automatic adjustment thereof to lit the surfaces of objects to be grasped, and means for operating said'jaw mechanism.

17. In a lifting device, the combination of a handle, jaws carried by the handle, gripping pieces carried by the jaws comprising means for moving the gripping pieces automechanism.

a handle, jaw mechanism carried by the handle, one or more spring-controlled gripping pieces connected to the jaw mechanism and tiltable around an axis transverse to the plane of movement of the jaw mechanism and thereby automatically adjustable to objects grasped thereby, and means for operating said jaw mechanism.

19. In a lifting device, the combination of a handle, jaw mechanism carried by the handle, one or more gripping pieces connected to the jaw mechanism and tiltable around an axis transverse to the plane of movement of the jaw mechanism and thereby automatically adjustable 'to objects grasped thereby, and means for operating said jaw 20. In a lifting device, the combination of a handle, jaw mechanism carried by said handle comprising a movable jaw, one or more gripping pieces tiltably connected to said jaw mechanism and thereby selfadjustable to fit the surfaces of objects grasped thereby, comprising means for moving the same automatically to a normal position,

.and means for operating said jaw mechanism.

21. In a lifting device, the combination of a handle, jaw mechanism carried bythehandle, one or more spring-controlled gripping pieces tiltably connected to the jaw mechanism and thereby automatically adjustable to objects grasped thereby, and means for op erating said jaw mechanism.

22. In a lifting device, the combination of a handle, jaws carried by the handle, gripping pieces carried by the jaws and tiltable in all directions with reference thereto, and 7 means for causing the aws to approach and separate.

23, In a lifting device, the combination of I a handle, jaws carried by the handle, gripping pieces carried by the jaws and tiltable in all directions with reference thereto and comprising means for moving the gripping pieces automatically to a normal position, and'means for causing the jaws to approach and separate.

24. In a lifting device, the combination of a handle, jaws carried by the handle, gripping pieces tiltably connected to said jaws and comprising means for moving the gripping pieces automatically to a normal position, and means for causing the jaws to approach and to separate.

25. In a lifting device, the combination of a handle, jaws carried by the handle, springcontrolled, self adjusting gripping pieces connected to the jaws and tiltable in all directions thereon, and means for causing the jaws to approach and separate.

FRANK B. LA MAY. Witnesses D. GURNEE, L. THON;