US1530010A

US1530010A - Safety hook

Info

Publication number: US1530010A
Application number: US741018A
Authority: US
Inventors: Neilson Albert Howard
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-10-01
Filing date: 1924-10-01
Publication date: 1925-03-17
Anticipated expiration: 1942-03-17

Description

March 17, 1925. 1,530,010

A. H. NEILSON j SAFETY HOOK Filed OCQ, l. 1924 ai INVENTOR ijf/Ii Zow/ All WITNEssEs 44 ATTORNEYS Patented Mar. 17, 1925.,`

,UNITED STATES V ALBERT HOWARD Neilson or TULSA, OKLAHOMA.

SAFETY HOOK.

Application filed October 1, 1924. Serial No. 741,018.l

To'. all 107mm it may concern.'

Be it known that I, ALBERT HowARn NE1L- soN, a citizen ofthe United States, and a resident of Tulsa, in the county of Tulsa l and State of Oklahoma, have invented certain new and useful Improvements in Safety Hooks, of which the following is a specication.

This invention relates to an improvement in safety hooks, andthe object of the inven- A tion is to provide a safety hook wherein the rope, cable7 or other element to be engaged with the hook may be readily and 'easily associated therewith, and whenl so associated serves to close or lock the hook whereby accidental displacement of the rope or cable from the hook is prevented, the safety hook being at the same time so constructed and organized that the rope or cable may be readily taken fromthe hook when desired.

Another object is to provide a safety hook of this character and having these advantages and which is also of simple and dur-` able construction, reliable in operation and easy and comparatively inexpensive to manufacture.

Other objects andadvantages of the invention reside in certain novelfeatures of the construction, combination and arrangement of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying` drawings forming part of this specification, and-inwhich:

illustrating one embodiment of the invention;

Figure 2 is a view thereof in longitudinal vertical section;

Figure 3 is a view in longitudinal vertical section; showing a slightly diiferent form f numeral 10 designates generally the hook constituting the present invention which in-.

Figure 1 is a view in side elevation and.

Referring to the drawings wherein for cludes a body portion llhollowed out to form a chamber 12. The forward end of the chamber 12 is closed by awall 13 integral wlth the body portion whereas the rear end of the chamber is open, as indicated at 111. A removable plate 15`is provided on one side.

of the body portion 1.1 andprovides for ready accessto the interior of the chamber 12 and assembly of the parts therein as will hereinafter more fully appear. The bill of thehook, designated at 16, is integrally indicated at 19 and which overlies the inclined face 17 of the bill at a point somewhat spaced from the bight 18 so that the chamber 12 is opened to the bill of the hook above the bight or seat 18 thereof.

A latch, designated generally at 20 is provided and is pivotally mounted. asat 21, on the body portion 11 of the hook. The latch 20 includes a setting finger 22 and a retaining linger 23 which define between thema 'recess or pocket 24: in which the rope, cable or other element engaged with the hook is adapted to be received. As clearly shown in Figure 2 the latch is so positioned on the body portion of the hook that in one position thereof the setting linger 22 lies across and ahead of the seat 18, as clearly shown in dotted'lines in Figure 2.' Vhen, so positioned the setting finger 22 adapted to be engaged by the cable, rope or other element when thel same is applied to or associated with the hook so that as the cable or rope .slides down the inclined surface 17 onto the seat 18 it willbe shifted from the position shown in dotted lines in Figure 2 to the po-y sition shown in full lines wherein the retaining finger 23is disposed across-the entrance to the hook.

A locking` lever, designated generally .at 25 is provided and isfulcrumed, as at 26. on the body portion 11. l At the lend ofthe lever 25 opposite its fulcrum 26 it is provided with a handle portion 27 which is readily accessible from the open cnd 14 of the body portion. A compression coil spring 28 engages the locking lever 25 at one end and the upper wall of the chamber" l2 vat* its opposite end and tends to urge the locking lever' into engagement with the latch. Preferably the ends of the spring 28 are received Lin recesses 252L and lla provided therefor in the lock lever and the body portion respectively. rlhe latch 20 is provided with a stop shoulder 30 and with ai to'otli 3l having'A an inclined face and a flat face, the flat face being vertical inone position. The lockv lever 25 is provided with ai tooth 82 which is cooperable with the stop shoulder 80'for limiting the open movement of tl'ie-`latc'h 2O and which is coopera'ble with the tooth 81 for holdngthe latch 20 in closed position that is in the position shown in full lines in Fig n'rev2. Vith the parts positioned asshown in dotted lines in Figure 2 the hook is set ready to receive the' cable, chain, rope or other element to be associated therewith. vWhen the rope is introduced intojthe hook it `will engagev the' finger 22 and will shift the latch ina clock-wise direction as viewed in Figi'ire 2, the inclined snr'faceof the tooth 31 camining' the locking lever 25 upwardly to permit of this movement ofthe latch. lVli'en the latch has been thrown to the fnll line position shown in Figure 2 the spring' 28 will have caused the tooth 32T of the locking lever to snap in position behind' the'tooth 31 of the' latch that is intoengagementV with the flat vertical face' of tlie'settiiiigJ tooth 3l. lThe engagement otv these teeth 3l and 82 prevent the latch from swinging' in a counterclockwise direction, as viewed in Fignre 2v and consequently precludes the possibility of the cable or rope slipping from the hook. When itis desired to release the clable or rope from the hook the handle portion 2 7 is grasped and the locking lever is raised upwardly about its fnlcru'rn to disei'igage the teeth 32 fromthe tooth 3l whe-renpon the rope or cable may be readily pulled from the` hook since the latch is freely r'otatable to permit of disengagement ot the hook from the chain or cable. y

In the form of the invention shown in Figure 3 the hook is designated at 85, and is identical in all respect-s with that disclosed in Figures l and 2, the only differ-A ence residing in the form of latching mechanism employed. This latching mechanism includes a latch member, designated generally at 36 and having a shank 37 pivotally mounted, as at 38, on the bod'y7 portion of the hook. At is ends opposite thepivot 88 the latch member has connected thereto a curved and hooked shaped retaining linger' 39, The shank is partially cut away to provide o shoulder 40 for a purpose which will' presently appear. A locking lever, designated generally at 41, is provided andv is fulcrumed, as at 42, upon the body portion of the hook. The locking lever rincludes an arm 42 partially cut away to enable the arm to cooperate with the shoulder 40 of the shank 37 of the latch. The lever 41 also includes a second arm 44 extending at right angles to the` arm 42 and having its outer end concaved and shaped as at 45, to engage the rope, cable or the like. lVith this arrangement the rope, cable or other element to be engaged with the hook may be associated with the hook at any time since it will coact with the inclined or camming surface 39 of the retaining linger 39 to lift the finger to permit of entrance of the rope, chain or cable. Once the cable has entered the hook the retainingv finger' will' drop", as' shown in full lines" in Figure 3. lVhen within the ho'ok the rope,l chain or cable'v will! seat against the end 45 of the arm 44 so to' hol-d the lever 4l in position tor seciire the latch against opening movement. It i-s to be nn derst'ood` that the engagement ofthe cable with the end 44 of the arm ofthe lever tends to swing the arm 42 of the lever in' a clockwise direction, as viewed in Figure 3 and thi'is tends tol bring' the shoulder 43vk intoengagement with the shank 37 of the latch to hold the same against openingmovement.

I claim: y l. A safety hook'having a latch provided with' a setting finger and a retainingr finger,

the setting finger being adapted to be actuated by the element engaged with the hook to throw the latch to closedk position wherein its retaining finger pre-vents displacement of the element from the hook, said latch havingastop shoulder and a tooth provided with a flat face and a curved face, a locking lever having a tooth provided with'aiiat tace engageable with the' stopshoulder of the latcli for limiting the opening movement of the latch and engageablc with the flat face ofthe tooth of the latch for holding the latchin closed position, the tooth of the lever also 'having a curved face cooperable with the curved face of the tooth of the latch for permittingv the latch to move fromr open to closed position, and a spring pressingthe lever into engagement with the latch,

2. A safety hook having a latch provided with a setting linger and a retaining finger,

the element from the hook', said latch having atooth provided with a r`flat face and a curved face, a 'locking'. lever having' a tooth provided with a flat face engageable with the flat face of the tooth of the latch for holding the latch in closed position.v the tooth ofthe lever also having a' curved. facey oooperabie with the curved face of the tooth of the gaging arm, said shank having a `shoulder,

latch for permitting the latch to move from said locking lever also having a shoulder enopen to closed position, and a spring pressgageable with the shoulder of the shank of 10 ing` the lever into engagement With the latch. the latch to hold the latch in position to close 3. A safety hook having a latch ncludthe hook. ing a pivoted shank and a curved` retaining finger, and a locking lever having a rope en- ALBERT HOWARD NEILSON.