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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).
Details on banjo fittings, gasolene filters and a Sparton horn.

Identifier  ExFiles\Box 19\3\  Scan119
Date  23th December 1929 guessed
  
- 9 -
This is a later type of fitting using banjo connections.
These however, we have found to cause a slight restriction in the gasolene line.
The different shaped heads on the plugs were made so as to easily distinguish between the different plugs.
Flat - - - - - M.S. Plug - not used on gasolene line.
Rounded - - - - - Stainless Plug.
Flat with pimple-Special stainless restriction plug.
Phosphor bronze banjos were used owing to the difficulty of brazing stainless.
Cuno type Suction Gasolene Filter.
Type A
L-376 Assembly on dash
A-14947 Compression Sleeve.
A-14948 Compression Nut.
A-14949 Compression Elbow.
This filter is for attachment to the dash and to fit it involves cutting the gasolene feed pipe just below the tank.
Type B - Cuno Filter.
This filter is made for attachment direct on the top of the vacuum tank. We have not succeeded in arranging a good mounting for this, either it has the glass bowl right over the exhaust pipe, which we would like to avoid - or it interferes with the bonnet.
Sparton S.O.S. De Luxe Horn.
A-12772 Horn mounting Assy.
A-12435 Horn.
A-12528 Cylinder Head showing location.
A-12723 Horn Bracket Assy.
A-12781 Horn Bracket.
This horn is found much more suitable mounted on the engine on account of the vibration otherwise carried to the dash.
All parts of the bracket A-12723 with the exception of the angle plate A-12781 are supplied with the horn.
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