Westinghouse lever frame
The Westinghouse organisation was born out of a number of signalling contractors that merged around 1915-1920. In fact, the company was originally called the Westinghouse Brake & Saxby Signal company, and many early frames of the type described here were marked with Saxby's name.
This frame is a high quality tappet frame, with reduced-action locking worked by the large catch-handle. Levers are spaced at 4".
There are three known varieties, the A (1914), A2 (1924) and A3 (1949) patterns. Manufacture ceased as late as 1977.
The type was adopted widely by the Southern Railway, but odd examples were used on the Great Eastern and later by the London & North Eastern Railway. Odd examples could be found elsewhere.
A few were manufactured by other contractors, possibly sub-contracted by Westinghouse.
This illustration shows a Butterworth & Dickenson-built example at Lenham, on which more details can be found in the Photo Gallery.