US1240663A - Reversing valve-gear. - Google Patents

Description

J. E BROGDON.

REVERSING VALVE GEAR.

APPLICATION FILED AUG.27. 1915.

a 14 van {"oz Patented Sept. 18, 1917.

2 SHEETSSHEET 1.

UNITED sra'rns PATENT curios.

JOEL BRO GIDON, OF MONTGOMERY, ALABAMA, ASSIGNOR OF ONE- FOURTH TO ARGHIBALD H. ARRINGTON, OF MONTGOMERY, ALABAMA.

REVERSING VALVE-GEAR.

Specification of Letters Patent. Patented Sept. 18, 1917- Application filed August 27, 1915. Serial No. 47,626.

To all whom it may concern:

Be it known that I, Jon. E; BnoeDoN, a citizen of the United States, residing at Montgomery, in the county of Montgomery and State of Alabama, have invented new and useful Improvements in Reversing Valve- Gear, of which the following is a specification.

This invention" relates to reversing valve gear for locomotive, stationary and marine engines, the valve gear of this invention derlving its motion from the eccentric or eccentric crank through a novel arrangement of levers hereinafter particularly described.

The particular feature of the valve gear forming the subject matter-of this invention resides in the arrangement of the levers, their supporting means and connections and the means by which the cut-oil or travel of the sliding valve and the reverse motion is obtained, resulting in a simple construction, economical in maintenance and fuel consumption.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts, as herein described. illustrated and claimed.

In the accompanying drawings Figure 1 is a view partly in side elevation and partly in section illustrating the reversing valve gear of this invention as applied to a locomotive engine.

Fig. 2 is an enlar ed side elevation of the radius fulcrum bracket, radius hanger and radius hanger fulcrum bar.

Fig. 3 a similar view of the radius hanger and radius hanger fulcrum bar.

Fig. 4 is an edge view of the parts shown in Fig. 2.

Referring to the drawings 1 designates the cylinder of a locomotive engine, 2 the slide valve controlling said cylinder, 3 the valve rod, 4 the eccentric rod and 5 the reversing lever.

In carrying out the present invention, I em loy a transmission hanger 6 which is pivotally connected at 7 to one end of the eccentric rod 4, the hanger 6 being pivotally connected at 8 to the arm 9 of the bell crank lever, the other arm 10 of said lever being pivotally connected at 11 to the valve rod 3. The bell crank lever is shown as pivotally mounted at 12 in a bracket 13 secured to a support 14- Extending horizontally from the support 1% is a fulcrum castingsupport 15 embodying oppositely arranged bars in spaced relation to each other to which are secured the parallel arms 16 of a radius fulcrum bracket 17, the arms 16 being shown asprovided with flanges 18 which. may be bolted, riveted or otherwise fastened to the fulcrum casting support'15.

19 designates a radius hanger which is pivotally connected at 20 to an open center radius hanger fulcrum bar desi nated generally at A and comprising the two side members 21 arran ed in spaced relation to each other and adapted to swing between. the side arms 16 of the bracket 17 The fulcrum bar A is pivotally connected at 22 to the bracket 17 and the radius hanger 19 is pivotally connected at 23 to the eccentric rod 4.

The radius hanger fulcrum bar A is extended beyond the pivot point 20 to form an extension or shorter arm 24: to which is pivotally connected at 25 an auxiliary reach rod 27 which connects pivotally at 27 with the arm 28 of a reversing shaft 29. 30 designates a reach rod pivotally connected at 31 to the arm 28 and connected at 32 to the reversing lever 33 which is usually ar ranged in the cab of the locomotive.

From the foregoing description, taken in connection with the accompanying drawings, it will now be understood that when the reversing lever 33 is moved to one limit of its throw. the point 20 is shifted in a corresponding direction thereby changing the position of the fulcrum bar A and correspondingly shifting the pivot point 23. This produces in turn a shifting of the pivot point 27 and through the medium of the bell crank lever, the rod 3 and consequently the valve 2 is shifted, the two extremes of movement of the lever 33 resulting in shifting the valve gear as a whole so as to cause the engine to drive ahead or reverse.

The construction hereinabove described embodies an extremely simple reversing valve gear, economical in production and maintenance and resulting in a saving of fuel and steam. The economy in fuel is brought about bv the quick action of the valve at the beginning and ending of its stroke and the economy of maintenance is due to the fact that the usual fiat wear ing; surfaces are dispensed with and all bearings may be renewed by supplying new bushings or pins. 7

Having thus described my invention, I claim In reversing valve gear for steam engines, the combination of a one-piece eccentric rod, slide valve rod, a fulcrum support embodying parallel bars in spaced relation to each other, a single transmission hanger pivotally connected at one end to the eccentric rod,, a bell crank connecting the transmission hangcr with said valve rod, a stationary U sha ed radius fulcrum bar bracket embodying laterally spaced .side portions fastened to the parallel bars of the fulcrum support, an inverted substantially U-shaped radius fulcrum bar havingthe extremities of both arms thereof pivotally connected to said bracket near the lower end thereof and also having an upstanding arm rising above the fulcrum of the radius hanger,a radius hanger pivotally connected at its upper end to and working between the arms of said fulcrum bar and pivotally connected at the lower end to said eccentric rod,

JOEL E. BROGDON.

iVitnesses T.. B. GISSENDANER, MARY M. 'I'IALE.

Copies of this patentmay'be obtained for five cents each, byaddrcssing the Commissioner of Patents,

Washington, D. C. V

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