US2131414A

US2131414A - Spring action friction block structure

Info

Publication number: US2131414A
Application number: US105114A
Authority: US
Inventors: Arthur E Westburgh
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-10-10
Filing date: 1936-10-10
Publication date: 1938-09-27
Anticipated expiration: 1955-09-27

Description

Sept. 27, 193,8. A. E. wEsTBURGH 2,131,414

SPRING' ACTION FRICTION BLOCK STRUCTURE A'Filed oct. 1o, 195e Patented Sept. 27, 1938 NITED ,STATES PATENTUFFICE l2,131,414 l srmNc ACTION FRICTIGN.amelie-Sauve' v i TURE- v Y Arthur Westburgh; .IamestoWn,`N. jY-. Anliegen. october 10, 1934s..serai.No.a114- 4 Claims. (01,..*4545-2531)*t invernzionrelates to ,a Aspring action friction block structure for exible couplings, particularly of the general type having driving and driven coupling sections provided with lugs coupled by a friction block, and especially of the improved type disclosed in Letters Patent No. 2,007,513, issued to me on July 9, 1935, and it aims to provide such a spring action friction block structure as will take up the bacl lash between the four coupling jaws by uniform spring action.

It is further aimed to provide such a block in the nature of sections having intervening expansive coil springs which urge them to and maintain them in an operative position.

Another object is to provide a block of the present character from a plurality of block sections, preferably two triangular sections with spring means expanding them at their diagonal edges.

In addition I aim to provide such a block structure wherein the sections have removable friction shoes to contact the lugs of the coupling, the spring feature rendering it easier to remove and replace the shoes, and to provide a novel lubricating means in coaction with said shoes.

'Ihe more specific objects and advantages will become apparent from the description following taken in connection with accompanying drawing illustrating an operative embodiment.

In said drawing:

Figure 1 is a view in perspective showing the improved spring friction block structure, partly broken away to disclose details;

Figure 2 is a detail perspective view of one of the shoes or friction strips alone;

Figure 3 is a transverse sectional view taken through a coupling employing my invention;

Figure 4 is a longitudinal sectional view taken on the plane of line A-A of Figure 3, and

Figure 5 is a detail perspective view of a coupling employing my invention, the parts being partially assembled.

Referring specifically to the drawing wherein like reference characters designate like or corresponding parts, the improved friction block per se is shown in Figure 1. It employs a plurality of sections I Il, preferably two, which are right triangular and face at their hypotenuses or diagonal edges II. Recesses I2 are bored in said edges and removably accommodate expansive coil springs I3 which urge said edges II apart as shown in Figure 1.

The right angular edges of the sections I0 are equipped with removable shoes or friction strips I4. Said shoes or strips may be made from any desiredrlfriction material, i such as ythat from which brake shoes are made, especially their molded lining, and for instance from a phenolic condensation product or bakelite having a textile liber base, such as the specific material sold under the name of Micarta.

Said shoes or strips I4 are secured vto the sections, for example, by set screws I5, countersunk into the shoes, and engaging screw threads in recesses I6 in the sections. Such sections I0 may to advantage be constructed of metal.

In the right angular faces of the sections IIJ are reservoirs, cavities or recesses II which may contain graphite or other lubricant. Said reservoirs are spanned by the shoes and are capable of being filled with the lubricant when the shoes are removed. Such lubricant exudes or escapes from the reservoirs through ports or openings I8 provided through the shoes in communication therewith.

The friction coupling of my Patent' No. 2,007,- 513 is an example of one form inwhich the improved spring action friction block structure may be employed to advantage. Such a coupling is generally shown in Figures 3 to 5 and it employs similar coupling sections A, one of which is adapted to be rigidly fastened to a driving shaft and the other of which is adapted to be rigidly fastened to a driven shaft, as disclosed in said patent. Removable jaws A conform to the jaws of the patented structure as they provide two lugs B on each coupling section, the lugs of one section being arranged at a right angle to the lugs of the other section.

The spring action friction block is operatively posititoned between the coupling sections A, enclosed by the lugs B with the inner planar surfaces thereof frictionally contacting with the outer surfaces of the adjacent shoes I4, the degree of friction being augmented and controlled by the tension of the springs I3. Such planar .surfaces and engaged surfaces of the shoes I4 will be efficiently lubricated by the lubricant exuding from the ports I8. It will be realized too that the lugs B of each coupling section engage parallel shoes of different blockv sections I0. Obviously any desired number of the springs I3 may be employed and it will be noted that their tension is exerted in four directions so as to uniformly take up the back lash between the coupling jaws or lugs in the operation of the coupling.

Various changes may be resorted to provided they fall within the spirit and scope of the invention.

I claim as my invention:

1. In a friction block for contact with the surrounding jaws of the sections of a iiexible coupling, said block at its jaw-engaging edges having removable shoes, said block comprising metallic sections provided with diagonal faces, said faces having springs seated in said recesses.

2. In a friction block for contact with the surrounding jaws of the sections of a flexible coupling, edges of said block being dished in spaced relation to the margins to provide lubricant reservoirs, ported shoes of friction material directly engaging said edges and covering said reservoirs, said shoes being in continuous engagement with the edges around the reservoirs with the ports forming outlets for the reservoirs.

3. In a friction block for'contact with the surrounding jaws of the sections of a flexible cou-4 recesses therein, and expansive coill expansive spring means constantly urging each block section into contact with angularly arranged jaws of each coupling section, said faces being recessed to seat said spring means.

4. In a friction block for contact with the surrounding jaws of the sections of a flexible coupling for two shafts, the block comprising two triangular sections substantially similar in size facing each other at their diagonal edges, and spring means'constantly expanding the block sections away from said edges on a line perpendicular tc said edges and each block section into contact with angularly arranged jaws, one on each coupling section, edges of the block section being Y dished in spaced relation to the margins to provide lubricant reservoirs, and shoes of friction material having outlet ports for the reservoirs directly covering said reservoirs and engaging said edges continuously around said reservoirs.

4ARTI-IUE. E. WESTBURGI-L