Style 'B' signal box index

The Westinghouse Brake & Saxby Signal Co. Ltd produced the Style 'B' mechanically locked lever frame from 1902, The styel 'B' lever frame was developed from the style 'A' lever frame of 1902. The first style 'B' was installed at Harton Colliery [South Shields 4½ miles [8 km] NNW of Sunderland ] in Dec 1902.

The follow on Style 'K' lever frame was introduced in 1912, and there is not much difference between the two, the 'B' lever frames were only used abroad until 1923. The 'K' lever frame of course was designated to be the "all-electric" version whereas the B had first been designed for electro-pneumatic use at sites which Southport Chapel Street was.

As far as the differences between B and K go there aren't really any other than the K usually had a greater number of contact bands because these were normally used for all-electric installations whereas the B was first designed for electro-pneumatic operation. Both had teak casing but LT companies often went for steel, similar to the L and N styles. I guess there were probably subtle changes to materials and parts between the B and K as there was a time separation between the first Bs and the introduction of the K so opportunity would have been taken to make improvements or economies. So the answer is that I've not come across any significant difference, it's more a case of marketing a "new" version by Westinghouse at the time because it's also not unknown for Ks to be used on electro-pneumatic jobs. Hope this helps Regards Mark

The table below in green shows the locations of the frames supplied and installed by Westinghouse Brake & Saxby Signal Co. Ltd

Westinghouse Supplied & Installed Style 'B' Power Lever Frames used in the UK

Signal Box Name Railway notes

Capacity

Point Levers Signal Levers Special Levers Spare Levers open closed
Southport Chapel Street L.M.S Railway   87 ? ? ? ?
1917
20th March 1994
St Lukes box L.M.S Railway   103 ? ? ? ?
1918
30th Nov 1969
Harton Colliery     ? ? ? ? ?
Dec 1902
 
Aldgate East London Transport   15        
1906
 
18 May 1946
Angel London Transport   11        
1919
22 January 1959
Archway London Transport   15        
22/06/1907
 
12 September 1992
Bethnal Green London Transport to Bolton Abbey 11        
18 November 1946
10th November 1999
Camdon Town London Transport   7 - 1946
34 - 1924
       
18 November 1946
 
23 July 1955
Canal Junction London Transport   23        
1950
24/03/1995
Charing Cross London Transport   12        
22 June 1907
 
09 June 1951.
Colindale London Transport   15        
01 January 1922
 
23/07/1961
Covent Garden London Transport to SVR museum 12 1 11   0
15 December 1906
 
13 October 1979
Cromwell Road London Transport   15        
01 January 1922
 
13 May 1961
Ealing Common London Transport   23        
10th March 1925
 
5th November 1960
Hyde Park Corner London Transport   23 3 13 2 3
1931
12th May 1979
Lambeth North London Transport   11        
1939
10th Aug 1991
Liverpool Street London Transport   23        
1937
9th Mar 1997
Paddington London Transport   8        
1939
??
Piccadilly Circus London Transport   8        
1939
??
Queens Park London Transport   27 10 11 4 2
26th March 1905
8th October 1990
Shoreditch London Transport   47?        
1913
19th May1928
Preserved Frames
Acton signal school London Transport London Transport              
Bolton Abbey Embassy Steam Railway London Transport 23            
Covent Garden SVR museum London Transport 12 1 11   0   Kidderminster Museum

 

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