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Proposal for a self-adjusting brake mechanism using a ratchet wheel to automatically compensate for wear.


Identifier  WestWitteringFiles\O\January1926-March1926\  Scan42
Date  8th February 1926
  
ORIGINAL
TO HS. {Lord Ernest Hives - Chair} ) FROM R. {Sir Henry Royce} (Le CanadelHenry Royce's French residence.)
c.c to WCR. RG. {Mr Rowledge}
Mr. Claremont.
BRAKES ADJUSTMENT.
It is possible, and I think practical, to make all six brakes on a car adjust themselves automatically, for wear and for original setting, thus -
Say back axle.
Pull lever loose on shaft, a spring holding this against axle tube, or rope tight in off position.
[Diagram Labels]
Spring to keep face ratchet teeth in mesh.
Brake expanding cam.
Fine ratchet wheel keyed to shaft with pre-determined slack, can move forward but not backward, pawl control.
Is it worth a patent?
Would it please Col. Rushton?
It can be arranged very neatly, and enclosed in a vaseline filled enclosing chamber. It has very few extra parts, saves some elsewhere, and always keeps levers at correct angles.
R. {Sir Henry Royce}
[Stamp: RECEIVED 8 FEB 1926 Hs {Lord Ernest Hives - Chair} ]
  
  
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).


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