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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Installation and wiring of Wind Tone Horns on the 20/25 HP Chassis.

Identifier  ExFiles\Box 59\3\  Scan349
Date  1st October 1935
  
COPY TO HS{Lord Ernest Hives - Chair}/WST. 16066.
8.10.35.
RHC.{R. H. Coverley - Production Engineer}
C.E.
BY/RD5/W.1.10.35.
20/25 H.P.Chassis.
Wind Tone Horns.
R.R.Sch.872 in conjunction
with LeC.4684.
In order to provide accommodation for the relay unit which is necessary with wind tone horns, R.R.scheme 872 has been produced,and we hand you herewith blue prints of :-
D.54723. Conduit. 1 off.
D.54724. Base Plate for Distn.Bd.{Mr Berend} ) 1 off.
and Regulator Unit. )
It is proposed that the horns shall be wired up by using a changeover switch,supplied with the horns, secured to the instrument board,using a single horn push in the steering column which is standard at the present moment.
There is room for the additional conductor in the existing conduits.
BY/RD.
  
  


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