US2120497A

US2120497A - Chain tightener

Info

Publication number: US2120497A
Application number: US42832A
Authority: US
Inventors: Walter A Heinrich
Original assignee: James R Kearney Corp
Current assignee: James R Kearney Corp
Priority date: 1935-09-30
Filing date: 1935-09-30
Publication date: 1938-06-14
Anticipated expiration: 1955-06-14

Description

June 14, 1938. w. AHEINRICH .CHAI-N TVIGHTENER Filed se t. so, 1935 Patented June 14, 1938 CHAIN TIGHT'ENER Walter A. Heinrich, St. Louis, Mo., assignor to James R. Kearney Corporation, St. Louis, Mo., a corporation of Missouri Application September 30, 1935, Serial No. 42,832

2 Claims.

This invention relates generally to chain tighteners, and more specifically to an improved chain tightener adapted particularly for use as a part of a pole-embracing assembly which includes a 5 length of chain that is passed about a pole for the purpose of securing to the pole a linemens work platform, a temporary cross arm or temporary side arm, a wire tong support, and various other structures and devices which are temporarily attached to electrical conductor-supporting poles, the predominant object of the in vention being to provide an extremely simple chain tightener of this type which is capable of performing its intended function of tightening a chain about a pole or other supporting structure in a highly efficient manner.

Fig. 1 is a longitudinal section through the improved chain tightener.

Fig. 2 is a cross section on line 2-2 of Fig. 1.

Fig. 3 is a view showing the improved chain tightener in use as a part of a pole-embracing assembly which secures a linemens platform to a pole, the pole being shown in section.

Fig. 4 is a sectional elevation taken on line 25 44 of F g. 3.

In the drawing, wherein is shown for the purpose of illustration, merely, one embodiment of the invention, A designates in Figs. 3 and 4 an electrical conductor-supporting pole with which is associated a linemens work platform 13. The particular platform B has fixed to the end thereof which is located adjacent to the pole A a pair of members C and C, which include bifurcated portions C and C3 that extend outwardly beyond 35 theadjacent end of the platform B. The members C and C are fixed to the platform by screws D and by an elongated bolt E which extends through apertures formed in portions of the members and through an opening formed transversely 40 through the platform. Attached to the bifurcated portions of the members C and C is a saddle element F, which is provided with opposed flanges F having apertures formed therethrough, through which bolts G pass, said bolts passing also through apertures formed through the spaced legs of said bifurcated portions C and C of the members and C' and transversely of the spaces between said spaced legs. The intermediate portion of the saddle element F which is located between the flanges F is shaped as shown in Fig. 3, and said portion contacts with the pole A as illustrated in the view men tioned, said intermediate portion of the saddle element being provided with a rib F which gives to said portion the required strength and rigidity.

Attached to the bifurcated portion C of the member C is a length of chain H, said attachment of the length of chain to said bifurcated portion of said member being accomplished by locating an end link of the length of chain between the spaced legs of the bifurcated portion C of the member C and extending the bolt G associated with said bifurcated portion through said link. The length of chain .H forms a part of a pole-embracing assembly which includes one of the improved chain tighteners T, said chain tightener being attached to the bifurcated portion C of the member 0' by a pair of connected chain links J and J, the link J of which extends between the spaced legs of said bifurcated portion C and embraces the bolt G associated with said bifurcated portion.

The chain tightener T comprises a hollow bar l preferably of rectangular cross-section which, at its outer end, is provided with spaced ears 2, the link J being located between these spaced ears and a pin 3 being extended through apertures formed through the ears-and through said link in a manner to loosely connect the link J to the bar I. At the end of the bar I opposite to the end thereof at which the spaced ears are located an end Wall 4 is provided (Fig. 1) through which a screw-threaded opening 5 is formed. The chain tightener T includes also a tubular element 6, preferably of rectangular cross-section, which is arranged in telescopic relation with respect to the bar I, as shown to the best advantage in Figs. 1 and 2. The tubular element 6 is provided with an outer end wall 1, at the outer face of which a head 8 is arranged, said head having fixed thereto a screw-threaded rod 9 that passes through an opening formed in the end wall 1 of the tubular element 6. The screw-threaded rod is extended through the tubular element 6 and passes through the screw-threaded opening 5 in the end wall of the hollow bar I into the hollow interior of said bar, as shown in Fig. 1, and said head 8 is provided with a loop portion II] which is adapted to receive a suitable tool so as to facilitate the operation of rotating the head and the rod.

The tubular element of the chain tightener has formed thereon a pair of spaced ears to which a buckle II is attached through the instrumentality of a link [2, as shown in Figs. 3 and 4. The buckle includes a loop portion !3 and a prong l4, said loop portion being of such dimensions that the links of the length of chain H may pass therethrough, and said loop being pivoted to the prong at the point designated by the reference character l5.

In the use of the improved chain tightener as a part of the pole assembly illustrated in Figs. 3 and 4, the length of chain H is passed around the pole A after the saddle element F has been properly positioned in contact with the pole. The free end portion of the length of chain is then passed through the loop portion I3 of the buckle II, and the length of chain is drawn as tight as possible about the pole, after which the prong I4 of the buckle is extended through a link of the length of chain to connect the chain and the buckle together. With the aid of a suitable tool introduced into the loop portion ID of the head 8 of the chain tightener, the head 8 and screwthreaded rod 9 are then rotated, such rotation of the screw-threaded rod causing the tubular element 6 to move inwardly longitudinally of the bar I. This results in the assembly comprised of the saddle element F, the length of chain H, the buckle H, and the chain tightener T being drawn tightly about the pole, so as to rigidly and firmly connect the pole-embracing assembly to the pole.

-In order to prevent accidental complete disengagement of the screw-threaded rod 9 from the bar I, the end of said rod is peaned over as indicated at 9' in Fig. l.

I claim:

1. A chain tightener for tightening a chain about a pole or like object comprising a saddle member adapted for contact with a pole or like object to one side of which member a chain to be tightened is attached, and a chain tightening device movably attached by means of a short section of chain to said member at the side of said member opposite to the side thereof at which said chain is attached thereto, said tightening device comprising a hollow bar having a screwthreaded opening formed in an end wall thereof, a tubular member with which said hollow bar is arranged in telescoping relation, said tubular member having an end wall provided with a smooth opening, a rod extended through the smooth opening of said tubular member and having a screwthreaded portion extended through the screwthreaded opening of said bar, a head associated with said bar for facilitating rotation thereof, and an element movably attached to said tightening device for releasably engaging said chain, said pole-contacting member being attached to said hollow bar of said tightening device and said chain-engaging element being attached to said tubular member of said tightening device.

2. A chain tightener for tightening a chain about a pole or like object comprising a saddle member adapted for contact with a pole or like object to one side of which member a chain to be tightened is attached, and a chain tightening device movably attached by means of a short section of chain to said member at the side of said member opposite to the side thereof at which said chain is attached thereto, said tightening device comprising a hollow bar having a screwthreaded opening formed in an end wall thereof, a tubular member with which said hollow bar is arranged in telescoping relation, said tubular member having an end wall provided with a smooth opening, a rod extended through the smooth opening of said tubular member andhaving a screwthreaded portion extended through the screwthreaded opening of said bar, a head associated with said bar for facilitating rotation thereof, and an element comprising a buckle movably attached to said tightening device for releasably engaging said chain, said pole-contacting member being attached to said hollow bar of said tightening device and said chain-engaging element being attached to said tubular member of said tightening device.

WALTER A. HEINRICH.