Apparatus for checking integrity of magnet valves in electro-pneumatic brake systems
AssigneeWestinghouse Air Brake Company
InventorRichard O. Burkett
Life of this patent
Estimating the term…
Abstract
Integrity checking apparatus including an indicator lamp on each car of a transit train equipped with electropneumatically controlled brakes, said lamp being illuminated when the application magnet valve operates to effect a brake application and remaining illuminated until a stick circuit, which is closed by the brake application operation to keep said lamp illuminated, is interrupted by operation of the release magnet valve in releasing the brakes, thus providing a positive means of monitoring the integrity of both the application and release magnet valves during a terminal test of the brake system.
Claims7
Testing apparatus for checking the integrity of the electrical portion of an electro-pneumatic brake system for a railway train vehicle, the pneumatic portion of which comprises a brake pipe from which fluid pressure is released for effecting a brake application and to which fluid pressure is supplied for releasing the application, and the electrical portion of which comprises an application magnet valve device effective, when energized, for venting the brake pipe to atmosphere and, when deenergized for cutting off such venting, and a release magnet valve device effective, when energized, for causing recharging of said brake pipe with fluid pressure and, when deenergized, for cutting off such recharging, and a trainline release wire, said testing apparatus comprising:
- a. means responsive to energization of the application magnet valve device for providing a continuous signal indicating energization of the application magnet valve device;
- and
- b. means responsive to energization of the release magnet valve device for terminating said signal.
Dependencies are inferred from the claim text.