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).
The design, materials, and insulation of a rocker component.
| Identifier | ExFiles\Box 37\1\ scan 109 | |
| Date | 25th May 1921 guessed | |
| (9) ROCKER: The rocker is practically always a steel pressing and almost always is insulated by being mounted on an insulated pin, and having a rubbing contact of insulating material such as Bakelite linen. The terminal post of the other contact is then earthed. On the Westinghouse outfit the rocker is earthed, the post insulated, and the cam is a special molding of Bakelite Micarta (paper base) impregnated with graphite on the outer surface to make it self lubricating, but being absolutely an insulator in the body of the cam. This cam is molded and broached with a D-hole to fit on the rotor spindle directly beneath the rotor. It works directly on the steel rocker, and wear is said to be negligible. Micarta or Bakelite-linen rocker bushes are widely used in place of fiber, which has been entirely abandoned for all electrical and mechanical work by the best makers, such as Delco and Westinghouse. COPY Yours truly, ROLLS-ROYCE OF AMERICA, Inc. Per M.{Mr Moon / Mr Moore} Olley MO/c (Enclosures) CC Mr. Belnap Mr. Beaver Mr. Nadin Mr. Bagnall Mr. Hulley Mr. Southern Mr. Manning Mr. Caswell | ||