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Publication numberUS2448419 A
Publication typeGrant
Publication dateAug 31, 1948
Filing dateOct 1, 1947
Priority dateOct 1, 1947
Publication numberUS 2448419 A, US 2448419A, US-A-2448419, US2448419 A, US2448419A
InventorsCoulter Andrew F
Original AssigneeFrederic Schaefer
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable dead lever guide
US 2448419 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

Aug. 31, 1948. A. F. COULTER 7 ,4 19

ADJUSTABLE DEAD LEVER GUIDE Filed Oct. 1, 1947 2 Sheets- Sheet l gVENTORi A Aug. 31, 1948. CQULTER 2,448,419

ADJUSTABLE DEAD LEVER GUIDE Filed 001;. 1, 1947 2 Sheets-Sheet 2 ww w BY wm rfmw the guide to a truck bolster.

Patented Aug. 31, 1948 ADJUSTABLE DEAD LEVER GUIDE- Andrew F. Coulter, Wilkinsburg, Pa., assignor to Frederic Schaefer, Pittsburgh, Pa.

Application October 1, 1947, Serial No. 777,236

The conventional dead'lever guide is formed merely by doubling a metal bar upon itself to form spaced side walls between which theupper end of a dead lever is inserted. The ends of the bar have holes for a pivot pin that connects The side walls of the guide are provided with a series of holes for receiving a pivot pin that extends through the upper end of the lever. By removing this pin from one set of holes and inserting it in another set, the upper end of the lever can be adjusted along the guide to take up slack-in the rigging due towear of the brake shoes. A minor disadvantage of such a dead lever guide is that a case the yoke normally is held in its lower the pin must be removed before the position of g the lever can be changed. A major disadvantage is that the sets of holes through the guide are not very close together, so that the upper end of the lever can be adjusted into only a few without removing the pin that connects the lever to the guide.

In accordance with this invention, the main body of the guide is an elongated supporting member having spaced side walls provided at one end with pin-receiving holes for pivotally connecting the guide to a truck bolster. This supporting member is channel shape with the tops of its sidewalls integrally connected together. The side walls have oppositely disposed longitudinal slots therethrough that are adapted to receive a pivot pin extending through'the upper end of a brake lever between the walls. The outside of the supporting member is provided along the bottom of one orboth of the slots with a series of teeth that mesh with teeth formed on a bearing yoke Whichfits over the supporting member and is slidable lengthwise of 'it. The yoke has an open bottom through which the brake lever extends, while the sides of the yoke are provided with holes for the ends of the brake lever pin. By lifting the yoke far enough to disengage its teeth from theysupf porting member teeth, the yoke can be adjusted to different positions along the guide. It the pin-receiving holes in'the yoke are in [the form of vertical slots, the yoke canbe lifted out-oi locked position by means of springs.

The invention is illustrated in the accompanying drawings in which Fig. 1 is a fragmentary cross section of brake rigging showing my improved dead lever guidein use; Fig. 2 is an enlarged side view of the guide; Fig. 3 is an end view showing half of the guide in section taken on the line III-III of Fig. 2; and Figs. 4 and 5 are views similar to Figs. 2 and 3, respectively, of a modification of this invention.

Referring to Fig. 1 of the drawings, a pair of brake beams I, supported in the usual way by brake hangers (not shown), are operated by a live'lever 2 and a dead lever 3 pivotally connected to them. The lower portions of the two levers are pivotally connected by a connecting 'rod 4 extending through the truck bolster 5.

The brakes are applied by swinging the upper of a piston rod 1 connected to the brake cylinder (not shown) The upper end of the dead lever is held by a fulcrum or dead lever guide 8 projecting in the usual way from one side of the bolster.

In accordance withthis invention, this guide is made in two pieces; an elongated supporting member, and a yoke slidably mounted on it. As shown in Fig. 3, the supporting member is in the general form of an inverted channel, the side walls ll of which are integrally connected at their tops by a flat Web l2. This web reinforces the side walls and prevents them from being bent. One end of side walls II is provided with a pair of holes l3, through which extends a pivot pin l4 that connects the guide to a. lug l5 that projects from one side of the truck bolster. The side walls are provided throughout most of their length with, oppositely disposed longitudinal slots I! which are just wide enough to receivea pivot pin l8 that extends through the upper end of dead lever 3 located between those walls. The supporting member is straddled by a bearing yoke 20 that has its sides provided with holes 2| registering with slots l1 and receiving the ends of the brake lever pin l8. The metal around the holes is thickened to provide adequate bearing surfaces for the pin. Of course, the bottom of the yoke is open so that the lever can project up into the supporting member.

In order to lock the yoke in any one of many different positions along the slots, so that brake lever pin D8 will be held in fixed position in. the guide, the lower edges of the supporting members side walls are provided with outwardly projecting flanges 23. Each of these flanges has a series of teeth 24 projecting from its upper surlengthwise of the supporting member to'another position and dropped into place .to hold the yoke there. When the pin is replaced in the yoke, the engaging sets of teeth will keep'the .yoke from moving along the guide. To prevent the ,yoke from being lifted ofi the supporting member when pin 18 is removed, the sides of the yoke are provided with extensions 26 that extend down past supporting member flanges 23 and then inwardly beneath them. These extensions are spaced just far enoughfrom the bottoms of the flanges to permit the yoke teeth to be disengaged from teeth 24 when the yoke is raised.

When the embodiment of theinvention shown in Fig. 4, from the yoke 3i] in order to adjust it along the supporting member 3!. The construction of this supporting member is essentially the same as the one discussed above, but the yoke has pin-receiving holes that are in the form of vertical slots 32. The upper walls .of these slots preferably engage the pin, but

the slots extend far-enough below the pin, when theyoke is in its lower position, to permit the yoke to be slid upward on the supporting member far enough to disengage the yoke teeth 33 .from the underlying teeth 34. This allows the yoke to be moved lengthwise of the supporting member while the .pin extends through them and slides along slots- 36. The yoke is prevented from accidentally moving upwardly on the pin, and releasing itself -from the supporting member'teeth, by means ofleaf springs 31 compressed between the bottoms-of the supporting member flanges r3.8.and the tops of the yoke extensions 39-thatprojectbeneath the flanges. The springs rriay beriveted tothe extensions toholdthem in p ace.

With both forms of this invention, the teeth are placed so. close together that the brake lever pincan be adjusted along the guide by much smallerincrements than could be done when'pinreceiving ,holes insteadof slots were used. .In

the one case this canbe done without even removing the pin from the lever andguide, thereby greatly facilitatingthe operation.

According to the provisions of the patent statuteal have explained the principle and construction of my invention and have illustrated and described what I now consider to represent its best embodiment. However, I desire to have itunderstood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

1. A brake rigging dead lever guide comprising an elongated supporting memberhaving spaced side walls providedat oneend with aligned pinreceiving holes forpivotally connecting the guide to a truck bolster, said walls also having oppositely disposed longitudinal slots therein adapted to receive a pivot pin extending'through the upper-end ofa brake lever betweenrthe Walls,

in Figs. 4 and 5 is used, itis notnecessary to remove the brake lever pin IS, shown in section the outside of said supporting member being provided along the bottom of at least one of said slots with a series of teeth, and a bearing yoke fitting'over and slidable lengthwise and vertically 0n the supporting member and having an open bottom adapted to receive said lever, the sides :of the yoke being provided with holes adapted to receive the ends of said brake lever pin, said yoke also being provided with teeth engaging some.ofssaidfirst-mentioned teeth to lock the yoke againstmovement lengthwise of the supporting member while the yoke is in its lower position thereon, whereby the brake lever pin can be adjusted to many different positions along said guide.

-2. A brake rigging deadlever guide comprising an elongated supporting member having spaced side walls provided at. one end with aligned pin-receiving holes for pivotal-1y connecting the guide to a truck bolster, said walls'also .having oppositely disposed longitudinal slots 'teeth to lockthe yoke against movement lengthwise of the supporting member while the yoke is in its lower position thereon, whereby the brake lever pin can be adjusted to manydi'fier- -ent positions along said guide, and the bottom of the .,'yoke projecting inward under said side walls and .normally spaced therefrom to 'limit upward-movement of the yoke on the supporting member.

3..A.brake rigging dead lever guide comprising an elongated supporting member having spaced side walls provided at one end with -aligned pin-receiving holes for pivotally connecting the'guide to a truck bolstensaid -walls also-having oppositely disposed longitudinal slots therein adapted to receive a pivot pin extending through the upper end of a brake lever between the walls, the outside of said supporting member being provided along the bottom ofat least one of said-slots with a series of teeth abearing yoke fittingover and slidable lengthwiseand vertically on the supporting member and having an open bottom adapted to receive said lever, .thesides of theyoke beingprovided withTholes adapted to receive the ends ofsaidbrakeilever pin, said yoke "also being provided with .teeth engaging some of said first-mentioned teeth to .lock the yoke against movement lengthwise .of .the .supporting .member while the yokecis .in.its lower position thereon, whereby the .brake'lever pin can be adjusted to many different positions alongsaid-guide, the bottom ,of-the.yoke,projectinginward under said side .walls and normally spaced therefrom v.to .limitcupward movement of the'yoke onthesupporting member, and springs-compressedz-between the bottoms of .said side walls and the .underlyinglportions of .the yoke to normally holdthe jyokein said'lower position.

4. A brake .riggingdeadlever guide comprising an elongated supporting v-member ihaving spaced :side walls provided at one end with aligned pin-receiving holes for pivotally connecting the guide to a truck bolster, said walls also having oppositely disposed longitudinal slots therein adapted to receive a pivot pin extending through the upper end of a brake lever between the walls, the outside of said supporting member being provided along the bottom of at least one of said slots with a series of teeth, and a bearing yoke fitting over and slidable lengthwise and vertically on the supporting member and having an open bottom adapted to receive said lever, the sides of the yoke being provided with vertical slots adapted to receive the ends of said brake lever pin with the upper walls of the yoke slots substantially engaging the pin while the yoke is in its lower position on the supporting member, said yoke also being provided with teeth engaging some of said first-mentioned teeth to lock the yoke against movement lengthwise of the supporting member while it is in said lower position, and said yoke slots permitting the yoke to be moved upward far enough to separate its teeth from said series of teeth without removing said lever pin, whereby the pin can be adjusted to many different positions along said guide.

5. A brake rigging dead lever guide comprising an elongated channel-shape supporting member having spaced side walls integrally connected at their tops and provided at one end with aligned pin-receiving holes for pivotally connecting the guide to a truck bolster, said walls also having oppositely disposed longitudinal slots therein adapted to receive a pivot pin extending through the upper end of a brake lever between the walls, the outside of said supporting member being provided along the bottom of at least one of said slots with a series of teeth, and a bearing yoke fitting over and slidable lengthwise and vertically on the supporting member and having an open bottom adapted to receive said lever, the sides of the yoke being provided with holes adapted to receive the ends of said brake lever pin, said yoke also being provided with teeth engaging some of said first-mentioned teeth to lock the yoke against movement lengthwise of the supporting member while the yoke is in its lower position thereon, whereb the brake lever pin can be adjusted to many different positions along said guide.

6. A brake rigging dead lever guide comprising an elongated channel-shape supporting member having spaced side Walls integrally connected at their tops and provided at one end with aligned pin-receiving holes for pivotally connecting the guide to a truck bolster, said walls also having oppositely disposed longitudinal slots therein adapted to receive a pivot pin extending through the upper end of a brake lever between the walls, the bottoms of said side walls being provided with outwardly projecting flanges each having a series of teeth along its upper surface, and a bearing yoke fitting over and slidable lengthwise and vertically on the supporting member and having an open bottom adapted to receive said lever, the sides of the yoke being provided with holes adapted to receive the ends of said brake lever pin and with teeth engaging some of said teeth in both of said series to lock the yoke against movement lengthwise of the supporting member while the yoke is in its lower position thereon, whereby the brake lever pin can be adjusted to many different positions along said guide.

7. A brake rigging dead lever guide comprising an elongated channel-shape supporting member having spaced side walls integrally connected at their tops and provided at one end with aligned pin-receiving holes for pivotally connecting the guide to a truck bolster, said walls also having oppositely disposed longitudinal slots therein adapted to receive a pivot pin extending through the upper end of a brake lever between the walls, the bottoms of said side walls being providedwith outwardl projecting flanges each having a series of teeth along its upper surface, and a bearing yoke fitting over and slidable lengthwise and vertically on the supporting member and having an open bottom adapted to receive said lever, the sides of the yoke being provided with vertical slots adapted to receive the ends of said brake lever pin with the upper walls of the yoke slots sub stantially engaging the pin while the yoke is in its lower position on the supporting member, the sides of the yoke also being provided with teeth engaging some of the teeth in both of said series to lock the yoke against movement lengthwise of the supporting member while it is in said lower position, said yoke slots permitting the yoke to be moved upward far enough to separate its teeth from said series of teeth without removing said lever pin, whereby the pin can be adjusted to many different positions along said guide, the bottom of the yoke projecting inward under said flanges and normally spaced therefrom to limit upward movement of the yoke on the supporting member, and springs compressed between the bottoms of said flanges and the underlying portions of the yoke to normally hold the yoke in said lower position.

8. A brake rigging dead lever guide comprising an elongated channel-shape supporting member having spaced side walls integrally connected at their tops and provided at one end with aligned pin-receiving holes for pivotally connecting the guide to a truck bolster, said walls also having oppositely disposed longitudinal slots therein adapted to receive a pivot pin extending through the upper end of a brake lever between the walls, the bottoms of said side walls being provided with outwardly projecting flanges each having a series of teeth along its upper surface, and a bearing yoke fitting over and slidable lengthwise and vertically on the supporting member and having an open bottom adapted to receive said lever, the sides of the yoke being provided with circular holes adapted to receive the ends of said brake lever pin and with teeth engaging some of the teeth in both of said series to lock the yoke against movement lengthwise of the supporting member while the yoke is in its lower position thereon, whereby the brake lever pin can be adjusted to many different positions along said guide, and the bottom of the yoke projecting inward under said flanges and normally spaced therefrom to limit upward movement of the yoke on the supporting member when said pin is removed.

ANDREW F. COULTER.

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

UNITED STATES PATENTS Number Name Date 318,369 Gottstein May 19, 1885 1,019,872 Williams Mar. 12, 1912 1,834,575 Camp Dec, 1931

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US318369 *May 19, 1885 Coupling for straps
US1019872 *Oct 17, 1910Mar 12, 1912Chicago Railway Equipment CoAdjustable brake-rod.
US1834575 *Nov 14, 1928Dec 1, 1931Universal Draft Gear AttachmenBrake adjuster
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2673483 *May 9, 1949Mar 30, 1954Premier Saf Brake Co IncAdaptable safety brake system
US4721007 *Feb 13, 1987Jan 26, 1988Entzminger WilliamVariable ratio lever arm mechanism
US4841799 *Jan 22, 1988Jun 27, 1989Entzminger WilliamVariable ratio lever arm mechanism
Classifications
U.S. Classification74/522
International ClassificationB61H15/00
Cooperative ClassificationB61H15/0078
European ClassificationB61H15/00C1A