US2538178A - Linesman's safety hook - Google Patents

Description

Jan. 16, 1951 f J. c. WEAVER LINESMANS SAFETY HOOK 2 Sheets-Sheet 1 Filed March 12, 1948 I INVENTOR. dames C. Wem/ef c l W 7 gornigs Jan. 16 1951 J. c. WEAVER 2,538,178

LNESMANS SAFETY HOOK INVENTOR. daf/766 C. Wem/ef Patented Jan. 16, 1951 UNITED STATES PATENT OFFICE LINESMANS SAFETY HOOK James C. Weaver, Paola, Kans.

Application March 12, 1948, Serial No. 14,542

3 Claims. l

This invention relates to improvements in safety hooks such as are used on linesmens belts to support a linesman in position to work at the top of a pole, tower or other structure.

The device has various uses in addition to its use by telephone and telegraph linesmen as it may be used by window washers, crane or hoist repair men and others and may also be used in parachutes and as a snap hook for cargo holding lines in boats and aircraft.

It is among the objects of the present invention to provide a safety hook or snap having double safety locking features so that the hookl cannot become accidentally unfastened, which is easy to apply and detach by the application of manual pressure to the handles thereof, which is not subject to displacement of its parts by bending or twisting, is automatically spring-operated into locked condition, can be formed of readily available, inexpensive materials, is light in weight, strong, durable and economical in construction and neat and attractive in appearance. A

Other objects and advantages will become apparent from a consideration of the following description and appended claims in conjunction with the accompanying drawings, wherein:

Figure l is a longitudinal, side elevation of a safety hook illustrative of the invention.

Figure 2 is a longitudinal cross-section` taken substantially in the planeof the section line 2-2 of Figure l. y

Figure 3 is a transverse cross-section taken substantially in the plane of the section line 3-3 of Figure l.

Figure 4 is a transverse cross-section taken substantially in the plane of the section line l-fl of Figure 1.

Figure 5 is a perspective View of the improved safety licor. operatively attached to a belt.

With continued reference to the drawings, the improved safety hook has two sides, generally indicated at I and II each of which sides has a rounded apertured lug, I2 and i3 respectively, intermediate its length with a handle at one side and a curved jaw at the opposite side of the corresponding apertured lug. The side l?? has a handle I and a jaw l andthe Side l l has a corresponding handle Ii and jaw Il. A pivot-pin I8 extends through the apertured lugs of both sides cf the hook and pivotally secures the sides t0- gether in a manner such that the two sides do not cross over each other. The handles lil and It are similar and are disposed at an angle to the jaws I5 and Il' such that when the jaws are closed the handles diverge away from the lugs I2 and I3, as clearly illustrated in Figure 1, whereby manual compression of the ends `of the handles remote from the lugs will tend to open the jaws. A coiled compression spring I9 is disposed between the handles I4 and I6 and resiliently urges the handles apart and urges the jaws I5 and I1 to their closed position.

The lug I 3 and jaw I1 of the side II is made substantially three times as thick as the corresponding lug I2 and jaw I5 of the side I0 and the lug I3 is longitudinally slotted or bifurcated to receive the lug I2 therein. The other end of jaw Il is also slotted or bifurcated, as is clearlyA illustrated in Figure 2, and receives therein the outer end portion of the jaw I5 when the jaws are closed.

The jaws I5 and I1 are slightly curved from the corresponding lugs to their outer ends and are provided at their outer ends with recurved portions which overlap in interrltting relation so that both jaws extend entirely around the outer end of the elliptical-shaped opening 2!! provided between the jaws when in closed position.

A locking lever or keeper 2 I, of channel-shaped cross section, is pivotallyconnected near one end to the handle I4 by a pivot pin 22 and has an end 23 overlying the lugs I-2 and I3 and a similar locking lever 24 is pivotally connected by a pivot pin 25 to the handle I5 and has an end 26 overlying the lugs at the opposite side of the main pivot pin I3 from the end 23 of the lever 2|. A coiled compression spring 2l is interposed between lever 2l and handle I4 to resiliently urge the end 23 of lever 2| toward the lug and a similar compression spring 28 is interposed between'lever 2li and handle I6 for the same purpose.

The lugs I2 and I3 are `provided in their outer edges with notches 29 which are brought into registry at opposite sides of the lugs when the jaws are in the closed position illustrated in Fig.- ure l. Lever 2l carries in the end 23 thereof a transverse pin 3B which is seated in the registering notches at the corresponding sides of the lugs I2 and I3 when the jaws are closed and lever 24 carries near its end 26 a similar transverse locking pin 3l which is received in the registering notches 29 at that side of the lugs I2 and I3. The pins Sil and 3l thus positively lock the sides l0 and I I in position such that the jaws I5 and I1 are closed and these jaws cannot be separated unless both of the vpins 3E) and 3| are removed from the corresponding notches.

As long as pins 30 and 3I are seated in the corresponding notches 29 pressure on handles I4 and I6 is not effective to open the jaws and the The safety hook can, however, be quickly and easily opened by manual pressure simultaneously on the levers 2l and 24 and handles [t and l5 so that this will provide a quick detachable connection which is easy to apply and remove from a' supporting ring or other structure.

The hook is operatively connected to a safety belt by an elongated loop, generally indicated at 32, which loop has apertured ends through which the pivot pin I8 passes and is spaced from the corresponding sides of the lug I3 by spacing washers 33 surrounding the pivot pin. rihe legs of the loop 32 extend rearwardly of the handles I4 and AI6 and the loop has a substantiallystraight transverse bight 34 at its end opposite the end secured to the pivot pin i 8. Bight 34 is of rounded cross-sectional shape to avoid excessive wear of the strap loop in which the bight is secured.

Figure 5 illustrates the manner in which the improved safety hook is operatively attached to a conventional safety belt 35. In this arrangement a hook strap 36 is secured at one end to the belt and has its other end turned back and secured to provide a loop 31 which receives the bight 34 of the hook loop 32. A D-ring 38 is secured to the belt by a strap loop 39 at a position spaced from the location of the attachment of the strap 35 of the belt so that, if desired, the strap 36 may be passed around a supporting object and the safety hook secured to the D-ring 38 to thereby attach the belt 35 to the object. Otherwise the safety hook may be detached from the D-ring and attached to a supporting ring or staple or other structure provided for the safety of workmen working in locations that require the use of a safety belt.

The invention may be embodied in other specific forms without departing from the spirit of essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed is:

1. A safety hook comprising two sides each having an apertured rounded lug intermediate the length thereof, a curved jaw at one side and a handle at the opposite side of said lug, a pivot pin extending through said lugs pivotally connecting said sides together, a compression spring between said handles resiliently urging said jaws together, a pair of locking levers pivotally mounted one on each of said handles with corresponding ends overlying said lugs, a transverse pin in each lever adjacent the end overlying said lugs, said lugs having notches `therein which register with each other and receive said pins when said jaws are closed, and compression springs between said levers and the corresponding handles resiliently holding said pins in said notches.

2. A safety hook for a linesmans belt comprising a pair of sides each having an apertured lug intermediate the length thereof, a handle extending to one side and a jaw extending to the opposite side of said lug, one of said sides having a lug and jaw thicker than the lug and jaw of the other side with said thicker lug bifurcated to receive the corresponding lug and said thicker jaw bifurcated at its outer end to receive the outer end of the opposing jaw, a pivot pin extending through said lugs to pivotally secure said sides together, a pair of locking levers pivotally secured, one to each of said sides, a locking pin carried by each 'of said levers, said lugs having notches receiving said pins when said jaws are closed, and spring means resiliently urging said jaws to closed position and said locking levers to` jaw locking position.

3. A safety hook for a linesmans belt comprising a pair of elongated side members each ofv which has intermediate its length an apertured lug projecting to one side of the member, a curved jaw at one side and a handle at the other side of said lug, the lug and jaw of one of said side members being thicker than the lug and jaw of the other side member and bifurcated to respectively receive the lug and jaw of said other side member, a pivot pin extending through the apertures in said lugs pivotally connecting said side members together in side by side relationship with said handles and said jaws mutually opposed, a spring disposed between said handles resiliently urging said handles apart and said jaws together, said lugs having aligned edges and having in said edges notches disposed at opposite sides of said pivot pin and so located that when said jaws are closed the notches in both lugs at the same side of the pivot pin register with each other, locking levers pivotally mounted one on each of said handles in opposed relationship to each other, locking pins carried one by each locking lever and received in the adjacent notches in said lugs to lock said jaws in closed position, and springs disposed one between each locking lever and the corresponding handle to urge said locking pins into said notches, said locking pins being movable out of said notches by manual compression of said locking levers and said jaws being separable by manual cornpression of said handles only after both of said locking pins have been moved out of said notches.

JAMES C. WEAVER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 221,697 Newcomb Nov. 18, 1879 584,924 Converse June 22, 1897 859,917 Claus July 16, 1907 904,595 Barmore Nov. 24, 1908 931,588 Forstner Aug. 17, 1909 943,220 Dufour Dec. 14, 1909 1,005,268 Metzger Oct. 10, 1911 1,150,581 DeLan Aug. 17, 1915 2,234,853 Brueggeman Mar. 11, 1941 FOREIGN PATENTS Number Country Date 755,980 France Sept. 18, 1933

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