US1324676A

US1324676A - Safety-hook

Info

Publication number: US1324676A
Authority: US
Publication date: 1919-12-09
Anticipated expiration: 1936-12-09

Description

C. KNUDSEN.

SAFETY HOOKk APPLICATION man JuLYfi, 1913.

1,324-,67 6. Panama" Dee'. 9, 1919.

m 2716.56 6.5 l L J1/www0 z @QJ/mma JM U/moen Madsen CHRESTEN KNUDSEN, OF OTLND, MANE. L

SAFETY-HOOK.

Specification of Letters Patent.:

Patented Dec. 9, 1919.'

Application filed July 6, 19187. Serial 170,243,583.

To @ZZ whom 'it may'oofnocrn Be it knownthat I, Cnnns'rnN KNUnsnx, a. citizen ofthe United States,`residing at Portland, inthe county of Cumberland and State of Maine, have invented 'new and useful Improvements in Safety-Hooks, of which the following` is a speeiiication.

This invention relates to safety hooks especially designed for cargo hoisting and lowering, the object in view being to provide a safe and reliable hook for the purpose stated, which is simple in construction, economical in manufacture, and which may be used with perfect safety in the raising and lowering of heavy articles, the hook being specially designed for marine use, but being, of course, valuable in other connections and uses which will suggest themselves.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, as herein described, illustrated and claimed.

In the accompanying drawings:

Figure l is a side elevation partly in section of the improved hook, showing` the latch or tongue in its closed position.

Fig. 2 is a similar view showing the open position of the latch or tongue.

Fig. 3 is a section on the line 3 3 of' Fig. 1, to show the spring-.pressed pin housed in the latch, and arranged to be held under yielding pressure against the camface of the lug on the hook-body to prevent casual opening movement of the latch.

Referring to the drawings, l designates the body of the hook, which is so shaped that it may be drop forged from steel or any suitable metal, thereby rendering the same reliable for heavy duty work. As shown, the body 1 is provided with a rope or cable receiving eye 2. The cable attaching means, however, may be of any sha-pe or construc-V tion, according to the particular use to which the hook is to be put. The bill or point 3 of the hook is formed in opposite sides of the inner face thereof with notches or recesses 4 embodying two substantially straight shoulders or walls 5 and 6 arranged at an angle to each other to receive and support against lateral and outward swinging movement, the free bifurcated end of a latch or tongue 7. The hook is further provided adjacent to the junction between the body 1 and the attaching means 2 with a projecting lug 8, having a cam face 9, the purpose of which will appeal'.

The tongue or latch 7 is connected toy the lug 8 by means of a pivot 10 and the heel ond of the latch is'formed'wit-h a rounded bearing face 11 vand concentric with the pivot 10 and adapted t0 bear against and cooperateI with an opposed shoulder 12v as shown in Figs. 1 and 2, thus removing most of the strain from the pivot 10 when any pressure is brought to bear against the inner or under side of the latch-which would have the effect of pressing the free end of the .latch outward. The latch is bifurcated or slotted adjacent to its pivot end as shown at 18 to form a recess for the lug S and the latch is also formed with a central longitudinal bore or socket 14 in which is placed a. compression spring' '15, the inner end of which is supported by the inner end wall 1G of the socket or recess 14. A pin 17 is inserted through the convolutions of the spring 15 and is provided with a rounded head or shoe 18 which rides against the Cam face 9 .of the lug S in the back and forth pivotal movements of the latch or tongue 7 and thereby eectively prevents accidental movement of the latch from the closed position shown in Figs. 1 and 3 to the open position shown in Fig. 2. It Will also be observed that outward movement of the free end of the latch 7 beyond the fully closed position of the latch is prevented by the strong bearing of said e'nd against the inner side of the bill 3 of the hook, while sidewise movement of said free end, when the latch is closed, is precluded by the straddling of the bill portion between the recesses 4 by the bifurcated end of the latch. The spring 15 .is completely housed within the socket in the latch member and the head 18 of the pin 17 takes the wear, thereby protecting the spring and greatly increasing the life thereof. A new pin 17 may be substituted for an old pin which has become worn through sliding contact with the cam face 9 of the lug 8. The latch or tongue 7 is preferably formed of malleable iron or other metal and as the body 1 will ordinarily be formed of a drop steel forging, an especially tough, durable and reli able safety hook is produced.

.1. A safety hook comprising a hookshaped body and a movable latch; the body having attaching means, a lug at the inner side of the body adjacent to said attaching means anden which is a cam face opposite the bill of the body, shoulders at opposite sides of said lug, and recesses in opposite sides ofthe inner side portion of the bill, and the latch being pivoted to the body lugr eccentrically to the cam face thereof and having a rounded inner end to bear against the shoulder of the body and also having a bifnrcated free end to engage the recessed inner side of the bill and bear outwardly against the bill, and a spring-pressed pin housed in the latch and arranged when the latch tends to open, to exert yielding pressure against the cam face of the lug on the body.

2. A safety hook comprising a hookshaped body and a movable latch; the body having attaching means and a portion at the inner side of the body adjacent to said attaching means and on which is a cani face opposite the bill of the body, and the latch being, pivoted to the said 'body portion eccentrically to the cam face thereof and arranged When closed to bear outwardly against the inner side of the bill of the body, and spring-pressed means carried by the latch and arranged when the latch tends to swing toward the open position, to exert yielding pressure against the cam face of the said body portion.

In testimony whereof I afx my signature.

CHRESTEN KNUDSEN.