Style Definitions

The Westinghouse Brake & Saxby Signal Co. Ltd and which later became Westinghouse Brake & Signal Co. Ltd after 1935 produced the now famous Miniature Lever Power Frame over a period of 60 plus years, from 1899 until the last frame unit was shipped in the 1960's. There were 19 styles of Frames manufactured by Westinghouse as per the table below, of these frames the Style 'B', 'L' and 'N' were the most common.

There is more information on the differences between the 'B' and 'K' style lever frame which cane be access using the Frame Type links below

Frame Type	First Built	Number built ex Works	Type of Locking Mechanical or Electrical	Notes
US	1899	2	Mechanical	Union Switch design of table Machine
Style 'A'	1901	4	Mechanical	Modified American design to incorporate Mechanical lever
A Ground	1908	2	Mechanical
Style 'B'	1903	101	Mechanical
B Ground	1906	10	Mechanical
Special	1904	3	Mechanical
German	1905	31	Mechanical
C Ground	1930	6	Mechanical	Mechanically locked with style 'L' and parts. Forunner of the 'N' and 'O' designs
Style 'K'	1912	35	Mechanical
KG	1927	51	Mechanical	Type 'K' with internal hand generator for power.
Style 'L'	1929	109	Electrical
M1	1908	3	Mechanical
M2	1911	1	Mechanical
Style 'N'	1931	40	Mechanical	Mechanically locked version of 'L' for use by London Underground Railways
Style 'N2'	1946	3	Mechanical	Remotely controlled version of 'N' no catch handles on lever
Style 'N2M'	1948	3	Mechanical	Mechanical version on N2
Style 'O'	1952	5	Mechanical	Mechanical N for uses in underground lines.
Style 'V'	1954	*	Mechanical	Vertical Machine for London underground railways. Devised by R. Dell. Fitted with pneumatic vales for remote control
Style 'V1'	1961	*	Mechanical