Physical description

779.1 - 4 page photocopy of a Westinghouse manual for a Type W Self Lapping Brake Valve, fitted to W3 and W4 tramcars, with design and operating information, drawings of parts and a graph showing its operation. Produced by Westinghouse dated 1946.



779.2 - 4 page photocopy of a Westinghouse manual for a Type E Relay Valve, working in connection with the W Self Lapping Brake Valve, fitted to W3 and W4 tramcars, with design and operating information, drawings and a list of parts. Produced by Westinghouse, dated November 1955.



Copy of document made for BTM March 1998 by Doug Prosser.



All sheets stapled together in corner.