US1772784A

US1772784A - Grappling hook

Info

Publication number: US1772784A
Application number: US308639A
Authority: US
Inventors: John A Shields
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-09-27
Filing date: 1928-09-27
Publication date: 1930-08-12
Anticipated expiration: 1947-08-12

Description

AW m, 1930 v J. A. smEgDs GRAPPLING HOOK Filed Sept, 27. 1928 @QVVENTOR.

, ATTORNEY.

partly encircle an object to be grasped, and

Patented Aug. 12, 19.3%

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| YTAE JOHN A. SHIELDS, OF AUBURN, CALIFORNIA GRAPPLING HOOK Application filed September 27,1928. Serial No. $38,639.

My invention relates, generically, to a pair of grappling hooks adapted for use in connection with hoisting and conveying devices, such as steam shovels, .derricks, cranes, etc., and, specifically, to a single hook provided with means for releasing the hook point when used alone or in combination with another imilar hook.

The main object is the provision of a pair of hooks capable of engaging and holding objects or material of diiferent sizes and irregular shapes, such as bowlders, logs, boxes, bales, etc. a

Another object is the provision or" one of said hooks when used in connection with another similar hook, or when used alone, with a locking and releasing device for the point of the hook.

The invention consists in certain novelties of construction and in the combinations of parts as herein set forth and claimed.

The accompanying drawing illustrates an example of the embodiment of the invention, the parts being constructed and combined according to the best modes of procedure I Y have so far devised for the purpose.

Figure 1 is a view inelev ation of a pair of grappling hooks with connecting means, showing my invention as a whole.

Figure 2 is a projection or edge view of the hook at the right.

Figure 3 is a projection or edge view of the hook at the left.

Figure 4 is a side view in elevation of one of the removable and interchangeable steel points.

Figure 5 is a side view in elevation oi the lever forming part of the point-locking and releasing means. I

Figure 6 shows in side view trigger for the lever.

The bodies of the hooks are fashioned to curved shapes, such as arcs of circles, or parts of ellipses, or simple curves so the hooks can a latch or' each hook may approximately be of a length equal to the radius which describes the curve. The numerals 1 and 2 designates the bodies of the hooks. Each hook has an eye 3 through which loosely and slidingly passes a gated slot open at the lower end.

chain or rope cured to a ring 5 adapted for connection with 'asuitabl'e hoisting chain or'cable.

The lower end of body .L is slotted to receiveja steel point 6 which is held in place by a th'readed bolt 7 passed through the parts and secured by. a nut.

The body 2 of the other hookhas an elon- Within this slot at its lower end is a steel point like 1 steel point 6, and interchangeable therewith,

pivoted through the medium of a threaded bolt 8, and nut so it can turn from the posishown in full lines to the position 1ndii by the dotted lines. To hold this point 'in operative position a lever 9 is pivoted within the slot by a pivot pin 10., The short arm 11 of the lever trictionally bears against the steel point at 12 and holds thepoint so it i cannot rotate. The lever is held in locking position by a latch or trigger l3 pivoted at one end let within the slot and having notch 15 which receives the end of the lever. This latch or trigger may have ahole 16 to receive an operating cord, and a projecting arm 17 to force the end of the lever outwardly when the trigger is raised and'rotatedI Each steel point may have a curved hearing surface or seat at 18 and the lowerend of the lever also has acurved'surface at 19 to "v fit the said seat. I v

It will benoted that each steel point has an inner edge at 20 which is substantially radial to the, curve of the body of the hook; that the long of the lever 9 is pivoted so as to to move outwardly away from the object grasped by the hooks, and that the short arm of the lever cannot pro ect around the lnner curved line of the hook; and that the latch or'itriggel for the level, Xtends outwardly where it cannot come in Contact 1 th the bject'being grasped and raised by the hooks.

i, the ends thereof being se- The book 2 having the points-chasing means is adapted for use alone in some in stances, as for dragging a log or raising an Object, and-when so used a cable or chain s to 'be secured infthe eye 3, as is obvious.

Thedo'tted lines in connection with the hook slicwn'b'yFigure Z illustrates the positions taken by the locking and releasing means when the load has been released.

The shapes of the bodies of the hooks, the disposition of a steel point relative to the inner curve of the body of the hook, and the disposition of the locking and releasing means for one of the hooks where its operation will not be interfered with by the object grasped by the hooks, are some of the important features of my invention.

lVhat I claim is: V

1. A hook having an eye at one end and a pivoted pointat the opposite end and locking and releasing means tor the point including a pivoted lever and a latch for the lever, said lever having an arm movableoutwardly and away from the point.

2. A hook having an eye at one end, a slotted body portion, a point pivoted at the open end of the slot, a pivoted lever in the slot, the short arm of which bears against the point and prevents the latters rotation, and. a latch or trigger for the lever; said latch being pivoted to the body of the hook and having means for positively engaging and rotating said lever on its pivot.

3. The combination with two grappling hooks, each hook having a curved body portion with an eye at one end and a point disposed at an angle to the inner curved surface of the body portion at the opposite end, one of said points at the end 01 the curved body portion being rotatable relative to the body portion, and means in connection with the body portion for locking the point and releasing the same, of a chain or rope loosely and slidingly located within the eyes of the hooks, said chain or rope being adapted for attachment to an operating device.

4. The subject-matter of claim 3 wherein the means for locking and releasing the rotatable point includes a pivoted lever and a latch fixedly pivoted to the body of the hook.

5. The combination with two grappling hooks, each hook having a body portion with an eye at one end and a point at the opposite end, the inner edge of said point being on a radial line relative to the inner curved surface of the body of the hook, the point otone of said hooks being rotatable with means comprising a separately pivoted lever and latch for locking and releasing the point, of a chain or rope loosely and slidingly located within the eyes of the hooks, said chain or rope being adapted for attachment to an operating device.

6. The combination with two grappling hooks, each hook having a curved body portion with an eye at one end and a point disposed at an angle to the inner curved sur face of the body portion at the opposite end, of means engaging the eyes of the hooksand adapted to pull them towards each other when said hooks engage a body to be lifted and the lifting power is applied; the point of one of said hooks being rotatable, and said hook being provided with means in connection with the point for releasing the load from the point when in mid air and being acted upon by gravity.

7. A hook having a slotted shank with an eye at one end, a point pivoted to rotate at the opposite end of the 'shank,a lever separately pivoted within the slot the short arm of which engages the point and holds the point against rotation, and a latch or trigger pivoted to the shank and engaging the long arm of the lever.

In testimony whereof I afiix my signature.

JOHN A. SHIELDS.