US283534A - Albert thayer and martin joseph connelly - Google Patents

Description

(No Model.

A. THAYER 8v M. J.O0NNELLY.

COMPRESSED AIR BRAKE.

No. 283,534.. Patented Aug. 21, 1883.

k w M WITNESSES: I IN YENTOR: 6M v 7 Mad H W m ATTORNEYS.

K PUERS. How-mum Wahinglnlil UNITED STATES PATENT OFFICE.

-- ALBERT HAYER Ann MARTIN JOSEPH oomnLLv, or noivnunv, MASS.

COMPRESSED-AIR BRAKE.

SPECIFICATION forming part of Letters Patent No. 283,534, dated August 21, 1883.

Application filed July 7, 1888. (No modcll 7 To all whont it may concern:

Be it known that we, ALBERT Tnivine. and MARTIN J. CONNELLY, of Roxbury, Suil'olk county, Massachusetts, have invented a new and useful Improvement in OompressedAir Brakes, of which the following is a full, clear, and exact description.

Our invention consists of atimeclosing device for the conductors valve or cook of the estinghouse compressed-air brake, so eontrivedthat when the said cook or valve has been opened to stop the train the said de vice will allow the cook or valve to remain open a sufficient length of time to "stop the train, and. will then automatically close the cock to shut oil the air-pressure, and thereby I shortly enable the brakes .to be released or let oil, so that the train will be ready to move on again without further attention to said valve or cook, and thus the trouble of closing the cock again before the train can proceed will be avoided, which must be done as now arranged if a cock is used; or, if asel f closing valve is used, it has to be held open until the train steps, which is also avoided by our device, which consists, essentially, of a weighted lever applied to the cock to close it, with a retarder consisting of a pneumatic piston and cylinder working either by compression or vacuum, all as hereinafter described.

Reference is to be had to the accompanying drawingaforming .part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 represents a sectional elevation of our device in which the rctarder worksby compression. Fig. 2 is a sectional elevation of the same in which the retarder works by vacuum.

On the pressure-pipe of the lVest-ing'house automatic brake, at some convenient place in each car, is placed sometimes avalve, sometimes a cock, with a line running from it, which, being pulled, releases the air-pressure from the pipe and applies the brake to the whole train. In case of a valve, it must be held open by the operator, or the brake will not remain set. If it is a cook, the train will stop, but will be. delayed until the train-men close the cock, the engineer being unable to release the brakes until the cock is closed. Delay resulting in collision is likely to occur when, in the night, the train-men are unable to find readily a cock that has been pulled by drunken or careless passengers, as was the ease in the late Spuyten Duyvil disaster. We

therefore propose to employ a cock, (1, in the pressure-pipe I), with the pull-cord 0 attached to a lover, (I, fitted to said cock for opening it to let the airflow out of the pressure-pipe, and to this lever we apply a weight, 6, for closing the cock, with a retarder consisting of a cylinder, f, and a piston, g, either working by compression, as in Fig. 1, or by a vacuum, as in Fig. 2, to resist the closing of the valve for a time, that will allow the train to stop before the cock is closed, but closing the same soon after the train stops,so that not much time will be lost before the train may go on again.

The piston is connected to the lever by its red h directly, and the cylinder is fitted on pivots i for a simple contrivanco; but in this "respect the arrangement maybe as preferred.

In Fig. l the piston has bucket or cup leather packing, which works loosely upward to allow the piston to rise readily, but works tightly downward and resists the fall of the weight by compression. until the air leaksthrough a small adjustable vcnt-hole in the piston, the size of which governs the time it will take the weight to close the cook, the cylinder being open at the top and closed at the bottom. In Fig. 2 the piston and packing are arranged the same as in Fig". 1; but the cylinder is open at the bottom and closed at the top, so that in this case it is the vacuum that retards the weight.

\Ve do not abandon or dedicate to the public any patent-able features set forth herein and not hereinafter claimed, but reserve the right to claim the same either in a reissue of any patent that maybe granted upon this application or in other applications for Letters Patent that we may make. 7

Having thus described our invention, we claim as new and desire to secure by Letters Patent 7 The combination, with the conductors valve or cook in the pressure-pipe of the W'cstinghouse brake, of an automatic time-closing device, consisting of a weight and a pneumatic rctardor, substantially as described.

ALBERT THAYER. MARTIN JOSEPH CONNELLY.

\Vitnesses:

JACOB GOLDSMITH, lVIINNIE GOLDSMITH.

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