US1915412A - Rail brake and disposition thereof - Google Patents

Description

June 27, 1933. E EDMUNDS 1,915,412

RAIL BRAKE AND DISPOSITION THEREOF Filed Dec. 5, 1931 5 Sheets-Sheet l RAIL BRAKE AND DISPOSITION THEREOF s sheets-sheet 2 Filed Dec. 5, 1951 J1me 1933- e. E. EDMUNDS 1,915,412

RAiL BRAKE AND DISPOSITION THEREOF Filed Dec. 5, 1931 5 Sheets-Sheet 5 Patented June 2 7, 1933 umrse s'raTEs Fries GLENN E. EEMUNDS, F CGLUMBUS, OHIO, ASSIGNOR TO THE BONNEY-FLOYD COMPANY,

' OF COLUMBUS, OHIO, A CORPORATION OF OHIO RAIL BRAKE AND DZSPOSITION THEREOF Application filed December The present invention relates to rail brakes and their application to track-mounted wheeled vehicles. Such brakes, for various reasons, are frequently favored over ordinary wheel brakes. Their design and mounting for efiective operation, however, present various difficulties which it is the object of the present invention to overcome.

In order that the invention may be clearly understood, I have illustrated practical embodiments thereof in the accompanying drawings, in which:

Figure 1 is a plan view of a portion of a mine car showing the application of a rail brake thereto.

Figure 2 is a section on line 22 ofFigure 1.

Figure 3 is a section on line 33 of Figure 1.

showing suitable brake operating mechanism.

Figure 5 is a section similar to that of Flgure 2 of a modified form of the invention, and

Figure 6 is a section similar to that of Figure 2 of a still further form which the invention may take.

Referring to the drawings, and first of all to Figures 1, 2 and 3, reference numeral 1O designates a longitudinal sill member and reference numeral 11 an outer side frame, front and rear wheels 12 and 13 being mounted in a known manner between the sill and frame. As here shown, the sill is in the form of a Z-bar, to the lower inwardly di rected flange of which the floor 14 is secured. The side frame 11 comprises a substantially vertical web portion 15 and a substantially horizontal web portion 16, a flare plate 17 being supported on the latter and on the top flange of the Z-bar, as partlcularly shown in Figure 3.

The side frame 11 is formed, as here shown, with integral inwardly extending flanges 18 43 and 19 presenting opposed vertical surfaces perpendicular to the inner face of web- 15,

and also presenting shoulders 20 and 21 having surfaces parallel to theinner surface of web 15.

A block 22 is mounted between flanges 18 Figure 4 is an end View of the mine car.

5, 1931. Serial No. 579,278.

and 19 for vertical reciprocation guided by the described surfaces and by tubular rollers 23 and 24 mounted on bolts 25 and 26 extending between the free ends of the flanges in vertically spaced relation.

, Block 22 comprises the side walls 27 and 28, the end wall 29, the bottom wall 30, the top Wall portion 31, and a substantially central vertical transverse wall 32 provided on its side remote from wall 29 with rack teeth 33. The wall 28 extends only to the partition wall 32 so that an open sided spring pocket 34 exists between the latter and wall 29. Into this spring pocket projects a ledge or step 35, here shown as integral with the side frame 11.

Between opposed spring seats on ledge 35 and top wall portion 31, is interposed a strong compression spring 36 which tends to hold the block 22 in its uppermost position. A brake shoe 37 is secured to the bottom wall 30 by means of counter-sunk bolts 38 and 39, the top of the shoe presenting an integral lug 40 projecting in a recess in the bottom of wall 30 so as to relieve bolts 38 and 39 to a large extent of shearing stresses. The disposition of parts is such that the shoe 37 is directly above the track rail 41. A lug 31, Figures 1 and 3, integral with wall portion 31 projects above roller 23 so that its abutment with the latter will limit downward movement of block 22. The block thus cannot drop out of this guide pocket even if the car is ofi the trackand spring 36 broken.

A bolt 42 extends between the sill 10 and side frame 11 to the rear of flange 18 and is supported in a downwardly extending boss 10 of the sill and in an aperture formed in the side frame. A gear segment 43 has a hub portion 44 mounted on bolt 42 and extends through an aperture 45 formed in flange 18 I so that its teeth engage the rack teeth The hub 44 is formed at each side with clutch teeth and is positioned by means of tubular portions 46 and 47 mounted on bolt 42 and having teeth engaged with the hub teeth. A lever arm 48 is fixed to tubular element 47 and has a cable 49 secured to its free end. Elements 47 and 44 constitute a tubular rock shaft actuated upon movement of lever 48 in a It) clockwise direction to. move the gear segment 43 and thereby move the block 22 downwardly to engage shoe 37 with the rail 41. I

Preferably, a pair of the brakes will be provided, one immediately to the rear of each front wheel adjacent the tread and flange thereof. The brake actuating cables-49 may constitute sections of a single cable centrally engaged with a drum 50 for simultaneous tensioning thereby upon manipulation of operating'lever 51, Figure4. Since this operating mechanism has been fully described in my co-pending application Serial No. 546,107, filed June 22, 1931 its further description here is believed unnecessary.

According to the embodiment of the inven tion shown in Figure 5, the block 52 is guided as block 22 above described. A spring sup porting ledge 53, however, is provided on the guide flange 54 rather than on the side frame proper, as described in connection with Figures 1', 2 and 3, the block 52 being open on the side toward flange 54. Mounted on the pivot bolt 55 for swinging by means of lever 56, is a telescoping lever comprising the parts 57 and 58, the latter being pivoted as at 59 to a central partition 60 of the block 52, suitable clearances being provided in the guide flange 61 in the adjacent wall of the block.

. The spring pocket 62 is open on the side toward the side frame.

According to Figure 6, the block 63 is ope on the side toward the side frame and also at the end adjacent guide flange 64 and receives the spring seat 65 integral with the latter, spring 66 being mounted co-axially with the vertical axis of the block. A lever arm 67 projecting through an opening provided in the guide flange 68 has a ball end 69 enga ing the top surface of block 63 immediately a ove spring 66', the lever arm being swingable by means of a lever 70 t0 the end of which a brake cable 711is connected. This embodi- .7 of the position of the operating station may be secured in each embodiment by disposing the actuating levers forwardly instead of" rearwardly of the brake block when space permits. From these sugestions it will beevident to those skilled in the art howthe rail brakes of the present invention maybe brake, as possible, while in the embodiment of Figure 6, the force of the return spring is exerted exactly along the vertical axis.

. It will be understood that the invention is susceptible of embodiment in various forms and that those shown and described are merely of an illustrative nature. I do not limit myself as to details of construction except as in the following claims.

I claim:

1. In a track-mounted wheeled vehicle, frame means providing a vertical guideway, a block reciprocable in said guideway and carrying a brake shoe for engagement with a rail of the trackway, means tending to move the block upwardly, and means operable to move the block downwardly, said last named means including a rock shaft and a telescoping arm fixed at one end to the rock shaftand pivotally connected to the block 5 at its other end. a

2.. In a track-mounted wheeled vehicle, a longitudinal member presenting a vertical surface-and having spaced flanges presenting-surfaces perpendicular to the first mentioned surface, a block guided by said surfaces for vertical reciprocation and carrying a brake shoe for engagement with a rail of the track, a member extending between the flanges for'holding the block against move ment away from said first mentioned surface, tubular means rotatable on said member, a spring tending to move the block upward ly, and means operable to move the block downwardly.

In testimony whereof I affix my signature.

GLENN E. EDMUNDS.

arranged for operation from either end of the ear.

It will be noted that in each-described embodiment of the invention, operating force is exerted on the brake block substantially along its vertical axial line so that jamming tendencies are obviated. In the embodiments of Figures 1 and 5, the return spring is brought as close to the vertical axis of the

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