US1289096A - Safety-hook. - Google Patents

Description

J. BOATRIGHT.

SAFETY HOOK.

APPLICATION FILED 0503,1917.

Patented Dec. 31, 1918.

2 SHEETS-SHEET l.

anon doc n1: noun. FEM-Rs co. rnamuma. wAsnmcmN. n. c.

J. BOATRIGVHT.

SAFETY HOOK.

APPLICATION FILED 050.3. 1911.

Patented Dec. 31, 1918.

2 SHEETSSHEET 2.

6H0: new? JACOB BOATRIGHT, OF JOPLIN, MISSOURI.

SAFETY-HOOK.

Specification of Letters Patent.

Patented Dec. 31, 1918.

Application filed December 3, 1917. .Serial No. 205.110.

To all whom it may concern:

Be it known that I, JACOB BOATRIGHT, a citizen of the United statesresiding at Joplin, in the county of Jasper and State of Missouri, have invented certain new and useful, improvements in Safety-Hooks, of which the following is a specification.

This invention relates to improvements in safety hooks more particularly to devices of this character employed in connection with hoisting devices of various kinds, and has for one of its objects to improve the construction and increase the efficiency and utility of devices of this character.

The improved device may be employed in connection with various forms of hoisting machinery, but is designed more particularly for use in mining operations, but it will be understood that it is not desired to limit the invention for use in connection with any specific form of hoisting machinery.

In the drawii'igs illustrative of the preferred embodiment of the invention- Figure 1 is a side elevation, partly in section, or the improved device with the hook guarding mechanism in its depressed or closed position.

Fig. 2 is a side elevation with the hook guarding mechanism in its elevated or open position.

Fig. 3 is a front elevation, partly in section, of the improved device.

Fig. i is a transverse section on the line H of Fig. 1.

Fig. 5 is a detached perspective view of the locking lever.

Fig. 6 is a detached perspective view of the combined latch and tripping device.

The improved device includes a stock or body 10 formed into an open hook 11 at one end and a hoisting cable receiving loop 12 at the other end, the latter pivotally united at 13 to the stock. The point of the hook 11 is formed with a conical recess 15 asshown in Fig. 2, theobject to be hereafter explained.

- A- sheathing member 16 encompasses the stock 10 and through which the latter is slidable. Attached to the sheathing 16 at 50 its upper end is a U-shaped clip 17, While a similar clip 18 is attached to the sheathing 16 at its lower end. The side members of the clips 17.1S are extendedat one side of the sheathing, and rigidly secured as by rivets 1920 between the extended sides of the clips are spacer blocks 2122. The

spacer blocks are coupled by an outwardly curved bar 23, the blocks and the bar being preferably integral. The bar 23 is formed with guide ribs 24. at spaced intervals and forming a guideway in which a locking block 25 is movably disposed, the locking block filling the space between the sheathing 16 and the guideway formed by the guide ribs. The locking block 25 is provided with an upwardlv directed portion 26 which operates between the inner end of the spacer block 21 and the sheathing 16, and serves to assist the movements of the locking block. A spring 27 is disposed between the locking block 25 and the spacer block 21, and oper-' ates to hold the locking block yieldably in its lower position. 1

Extending from the sheathing 16 are cars 28 in spaced relation and through which a pivot pin 29 extends, and engaging the pivot pin is a locking lever 30 h-iving a projecting pin 31 adapted toengage in a socket 32 in the stock 10, the sheathing being provided with an aperture for the passage of the pin. A spring 33 is disposed between the locking lever 30 and the sheathing 16 and operates to maintain the lever with its pin 31 normally in engagement with the socket 32. At its upper end the lever 30 is reduced as shown at 3st to engage in a socket 35 in the lower edge of the locking block 25. At the juncture of the spacer block 22 and the bar 23 a small recess, indicated at 36, is formed in which the depression 15 of the point of the hook 11 engages when the sheathing member and its attachments are in their lower position as shown in Fig. 1. By this means the spacer block 22 and a contiguous portion of the bar 23 serve as closures to the hook. and effectually prevent the release of the link, hook, or other device which may be engaged in the hook. Slidably attached to the lever device 30 is a latch member 37 having a longitudinally. directed slot 38 through which a pin 39 extends, the pin being rigidly connected to the lever member. The latch member 37 is so formed that when the locking block 25 is in its lower position the latch member will bear against the lower face of the locking block as shown in Fig. 1, while the pin 31 will be seated in the socket 32 and the reduced portion34 of the lever 30 seated in the socket 35. When thus arranged it will be obvious that the lever member is locked in position and operates to hold the sheathing and its attachments in lower position and elfectu-allv close the entrance to the hook. The springs 27 33 coact to hold the locking block 25 and lever 30 in their closed position.

When the closure is to be released from the hook the operator places the forefinger of one hand beneath the latch 37 and first moves the latter upwardly, this upward movement being made possible by the coaction of the slot 38 and the pin 39. This upward movement of the latch elevates the locking block 25 and releases the reduced portion of the lever 34, and enables the operator to next force the upper end oi. the lever 30 inwardly toward the sheathing 16 and correspondingly withdraws the pin 31 from the socket 32 and enables the sheathing and its attachments to be elevated into the position shown in Fig. 2 and thus opens the entrance to the hook. The spring 33 is depressed when the lever 30 is moved inwardly, and as the sheathing and its attachments are moved upwardly the free end of the pin 31 is held against the solid portion of the stock 10, the spring 33 being of suflicient strength to hold the sheathing and its attachments in their upward position against the force of gravity which would depress them when the finger of the operator is removed from contact with the latch. When it is desired to again close the hook a slight downward pressure upon the upper portion of the bar 23 will cause the sheathing and its attachments to move downwardly against the frictional pressure in the relative position shown in Fig. 1.

The improved device is simple in construction, positive in its action and easily operated, and may be constructed of any suitable size to adapt the device to various forms of hoisting apparatus.

The improved device is adapted more particularly for use in mining operations, and can be made strong'and durable, and being of few parts will not be liable to get out of order.

Being maintained in elevated position I by friction only, a slight jar or blow imparted to the stock or the sheathing will be sufiicient to release the same and permit it to fall by gravity in hook closing position, the locking devices a-utoinatlcally assuming the position shown in Fig. 1. c

Having thus described the invention,

what is claimed as new is: i

. 1. A device of the class described including a stock having hook at one end, a

' member slidable on the stock and closing tively to the slidable member and coacting with the trip device to hold the same in look-- ing engagement with the stock and slidable member. s

2. A device of the class described including a stock having a hook atone end, a member slidable on the stock and closing the hook whenin one position, a trip device having means when in one position for holding the slidable member in engagement with the stock, a locking block movable rela tively to the slidable member and c'oacting with the trip device to hold the same in locking engagementwith the stock and slid-- able member, and means for releasing the block from engagement with the trip device.

3. A device of the class described includ ing a stock having a hook at one end and an intermediate socket, amember slidable on the stock and closing the hook when in one position, a locking block movable relative to the slidable member, a trip device movable relative to the slidable member and having a pin adapted to engage in thejsocke't to lock the slidable member in position to close the hook, and a latchdevice carried by the trip device and adapted to displace the locking block and actuate the trip device.

4.. A device of the class described including a stock having a hook at one end, a sheathing member, slidable on said stock, a bar connected to said sheathing member at the ends and provided with guide ribs, a locking block engaging said guide ribs and movable relative to the sheathing and coacting with the sheathing to close the hook when in one position, a trip device movable relative to the sheathing member and coacting with the locking block to hold the sheathing member and the connecting bar in position to close the hook, and a latch device carried by the trip device and adapted to displace the locking block and actuate the trip device.

5. A device of the class described including a stock having a hook at one end, a sheathing member slidable on said stock, strap devices attached to said sheathing member at its ends and including spaced sides, spacer blocks secured between'said spaced sides, a bar uniting. said spacer blocks andhaving'guide ribs, a locking. block movably engaging said guide ribs, a trip device movable relative to said sheathing member and coacting with the locking block to' hold one of said spacer members and the connecting bar in position to close the hook, and alatch device carried by the trip deviceand adapted to displace the looking block andactuate the trip device.

In testimonywhereof I aiiix my signature;

JACQB BOATRIGHT. -[L. s]

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eat-eats,

Washington, D. C. I i

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