US1846123A - Brake - Google Patents

Description

L. E. LA BRIE Feb. 23, 1932.

BRAKE Filed March 25, 1929 I INVENTOR. LUDGER E. LA BRIE A TTORNEY Patented Feb. 23,

UNITED STATES PATENT OFFICE 'L'UDGEB E; LA BRIE, 01 SOUTH BEND, INDIANA, ASSIGNOR T0 BENDIX BRAKE CJOI- IPANY, OF SOUTH BEND, INDIANA, A CORPORATION OF ILLINOIS Application filed larch 25, 1929. Serial No. 349,589.

This invention relates to brakes, and is illustrated as embodied in an internal expanding brake for an automobile or the like. An object of the invention is to provide a novel and simple self-adjusting anchorage for at least one shoe of the brake. Various features of novelty relate to a novel linkage connecting the shoe to its anchorage in a manner permitting the desired self-adjustment, to the structure of the shoe to co-operate with this linkage, and to other novel and desirable constructions and arrangements which will be apparent from the following description of the illustrative embodiment shown in the accompanying drawings, in which:

Figure 1 is a vertical section through the brake, just inside the head of the brake drum, and showing the-brake shoes in side elevation; and

Figure 2 is a partial section on the line 2-2 of Figure 1, showing the novel brake anchorage.

The illustrated brake includes a rotatable drum 10, at the open side of which is a su port such as a backing plate 12, and withln which is the brake friction means, preferably including a primary shoe 14, a secondary shoe 16 connected to the primary shoe by means such as a floating pivot 18, and an auxiliary shoe 20. Shoe 16 has spaced parallel stiifening webs, between which the ends of shoes 14 and 20 project. i

The brake is applied by means such as a double cam 22, acting directly on shoes 14 and 20 against the resistance of a return spring 24, and acting indirectly on shoe 16 through shoe 14 against the resistance of an auxiliary return spring 26.

The present invention relates to the brake anchorage, and is shown as including an anchor pivot 28 carried by the backing plate, and on which the shoe 16 is directly pivoted at its end. The anchor pivot may be arranged to pass through a relatively large opening 30 in shoe 20, but does not directly engage that shoe. Shoe 16 also has mounted between its webs a transverse pin or pivot 32, which may have if desired, and as shown, an enlarged head slidably engaging the'backing plate.

The lower end of shoe 20 is preferably formed with an enlarged opening or radial slot 34 encircling pin 32, and the edge of which is urged against pin 32 by means such as a coil spring 36 tensioned between shoe 20 and shoe 16, so that pin 32 serves as a stop determining the released osition of the lower end of shoe 20. The bra ing torque of shoe 20 is taken, in the arrangement illustrated, by a pair of compression links 40 on opposite sides of the web of shoe 20 and connected to that web between the ends of the shoe by means such as a pivot 42. Links 40 are pivoted at their lower ends on the anchor 28.

Pivot 42 may, if desired, be tight enough to grip the upper ends of links 40 frictionally to the shoe 20, or pivot 42 may be re-V placed by a nut and bolt which can be tightened for this purpose, links 40 will not shift with respect to the shoe during the release of the brake. If preferred, however, links 40 may turn freely on pivot 42, the released position of shoe 20 being determined by cam 22 at one end and by pin 32 at the other end, together with links 4% determining its position vertically.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of theinvention to that par ticular embodiment, or otherwise than by the terms of the appended claims. The present application is in part a continuation of my prior application No. 312,114, filed October 12, 1928.

I claim; 7

1. A brake comprising, in combination, an anchor, a'shoe mounted on said anchor and having spaced webs carrying a transverse pin, and another shoe linked to said anchor and having a part extending between said webs and formed with an opening embracing said 1n. p 2. A brake comprising, in combination, an anchor, a shoe mounted on said anchor and having spaced webs carrying a transverse pin, and another shoe having a relatively large I opening for said anchor and connected to said anchor by a compression link and having a part extending between sald webs and formed with an opening embracing said pm.

This insures that 3. A brake comprising, in combination, a

fixed anchor, a shoe pivoted "at one end on said anchor, and another shoe having an intermediate part linkedto said anchor. 4. A brake comprising, in combination, a fixed anchor, a shoe pivoted at one end. on said anchor, and another shoe linked to said anchor.

5. A brake shoe having a single stiffening web with a radially-arranged elongated slot at its end and with a pivot arranged between its ends.

6. A brake shoe having a stiffening web with a radially arranged elongated slot at its end and with a pivot arranged between its ends and which is provided with a cam thrust plate at its opposite end.

, 7. A brake shoe having a compression link for an anchorage pivoted thereon between its ends and frictionally gripped thereto to resist relative movement of the link with respect'to the shoe. 8. A brake shoe adapted to be. engaged by an applying device at'one end and having near its other end a compression link for an anchorage pivoted thereon between-its ends and frictionally gripped thereto to resist relatige movement of the link with respect to the s oe.

9. A brake shoe comprising a contacting portion, a stifiening web, and a link secured to the web intermediate the ends of the shoe adapted to. take a braking force.

10. A brakefshoe comprising a web, said web having a clearance opening adjacent one end of the shoe adapted toencircle a pin form ing a stop, and a torque taking link intermediate the ends of the shoe.

11. A brake shoe comprising a web having a pair of clearance openings adapted to encircle anchor pins, aiid a torque taking link intermediate the ends of the shoe.

In testimony whereof, I have hereunto signed my name.

- LUDGER E. LA BRIE.

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