US2027279A

US2027279A - Snatch block

Info

Publication number: US2027279A
Application number: US43415A
Authority: US
Inventors: William J Lee
Original assignee: WESTERN BLOCK Co
Current assignee: WESTERN BLOCK Co
Priority date: 1935-10-03
Filing date: 1935-10-03
Publication date: 1936-01-07
Anticipated expiration: 1953-01-07

Description

Jan. 7, 1936. w EE 2,027,279

' SNATCH BLOCK Filed Oct. 3, 1935 WITNESVSES r W?!- v Z 16077 le's Patented Jan. 7, 1936 UNITED PATEN T O F FI 'C E SNATCH BLOCK William J. Lee, Lockport, N. Y., assignor to The Western Block Company, Lockport, N. Y., a corporation of New York Application October 3, 1935, Serial No. 43,415

2 Claims.

Fig. 3 shows a fragmental view somewhat enlarged as compared with Figs. 1 and 2, showing the parts in side elevation;

Fig. 4 shows a front elevation of the spring which prevents the accidental disengagement of the connection between the head and link;

Fig. 5 is a top plan view of the spring shown in Fig. 4.

Similar reference characters will be employed throughout the specification to designate corresponding parts.

In the drawing is shown a tackle block or, as it is sometimes called, a snatch block, excepting as will be pointed out, of well known construction comprising shell members i and 2 commonly made of wood, malleable iron, steel, or other material suitable for the purpose. To each of the shell members i and 2 are fixedly secured the

suspension straps

3 and 3 held in place by any suitable means, as for instance the pockets 5 and B, on the outer side which may be formed integrally with the shell members, and each of the suspension straps 3 and t bears against the upwardly extending supports I and 8 forming a part respectively of the shell members I and 2.

The block further comprises the usual head 9 which is pivotally engaged with the looped end of the strap 3 so that the head may swing from a disconnected to a connected position, as clearly shown in the drawing. The head 9 at a point diametrically opposite itsconnection with the loop of the strap 3 is provided with a horn or hook I arranged to be engaged by a loop or link II which. is pivotally connected with the upper looped end of the strap 6. As usual in such constructions, the lower ends of the

straps

3 and 4 project upwardly to a different extent so that when the head 9 is in the position shown in Figs. 1 and 3, the horn or hook It may be engaged with the loop or link I I, and when under load will remain in that position while the block is supportdng the load, as for instance the cable passing over and around the pulley l2, or carried by the swiveled hook I3 carried by the head 9.

All the parts so far described may be of any usual or preferred construction and in and of themselves constitute no part of the present invention. Such blocks in use, when relieved of the load by the dropping of the head, frequently result in the accidental disconnection of the loop or link II with the horn II] which if not discovered before lifting the load, frequently leads to serious accidents as in such a condition the weight or load will be entirely borne by the 19 strap 3.

The object of the present invention is to prevent the accidental disconnection of the hook or horn I El and loop or link I I, and for this purpose the block is provided with a spring I4 engaging the loop or link II at a point above its pivotal connection with the strap 4 so that, as indicated in .dotted lines in Fig. 3, the spring has a tendency to always move the loop or link II from the position shown in dotted lines in that figure to the position shown in full lines, thus preventing the accidental disconnecting of the horn Ill with the loop or link II.

The spring I4 is provided with a downwardly extending shank or tongue I5, an intermediate cross member I6, and the parallel upwardly extending arms I! of such a length and so spaced with relation to each other than when in position, as shown in Figs. 1, 2, and 3, the arms I I will bear upon the side members of the loop I I exerting pressure thereon immediately above the pivotal connection of the lower end of the loop or link I I with the strap 4, all as shown in Fig. 3 of the drawing. The spring I4 is secured in. position by inserting the shank or tongue I5 in the socket 6, and when positioned as shown in Fig. 3, the pressure of the upwardly extending arms I! against the link or loop I I will hold the link II in operative position, ready to be engaged by the hook or horn I0 and to resist the accidental disconnection thereof.

The upper ends of the arms I! of the spring 5 8 may be transversely dished or. curved as shown at I 8, forming upon their inner faces a concave seat I9 to more efiectively engage the loop or link II which is generally made substantially round or circular in cross section. Obviously the spring I4 will be made of steel or other suitable spring material.

It is thought that the operation of my improved tackle or snatch block has been sufliciently described in connection with the foregoing description of its construction and that a further description of its operation will not be required.

I claim: latter pocket and extending upwardly therefrom 1. In a snatch block, in combination, shell n p s o engage the loop or link. members, open pockets on opposite sides thereof, 2. A snatch block such as defined in claim a swinging head provided with a hook or horn, a in which the shank of the spring is provided with support therefor mounted in one of the shell 2. cross member extending laterally upon each pockets, a, loo or link arranged, t engage th side thereof with upwardly extending parallel said horn, a support therefor mounted in the laterally spaced m m arr n e to en a e the pocket on the opposite side, and a spring acting l p or link up pp sid s of ts pp thereon, said spring having a shank fitted in said WILLIAM J. LEE.