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).
Design issues and modifications for a Bendix pinion.
| Identifier | ExFiles\Box 40\6\ Scan018 | |
| Date | 5th December 1921 | |
| R.R. A (100 T) (S.H. 788. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947. HS.{Lord Ernest Hives - Chair} From R.{Sir Henry Royce} C. to BY.{R.W. Bailey - Chief Engineer} X 3592 R1/5.12.21. X.4862 - BENDIX PINION. You will remember that we never intended our drawing to be a design, but that you would get a model from Smiths or another type of motor. On examination what we have done one sees:- 1. That a collar is missing at the end of the worm, so that the thrust shall be self-contained. 2. That both ourselves and other people require a more definite spigot for the spring as it passes into the first convolution where it should be a fairly close fit, afterwards the internal piece is tapered down to clear the spring, so that the torque passes into the spring and out to the pinion without over-stressing its fixing or itself by hooking on a solid pin and fitting a block between the back of the spring and the front of the next projection. See original for sketch. The sketch shows how to form the piece carrying the spring by forming a collar and then milling it away to leave three projections, one of which would be rounded, the other two would carry rivets with large heads to limit the movement of the spring endways. See original for sketch. The spring plunger holding the pinion in the out position has probably replaced the out of balance scheme used for this purpose, therefore fit this and leave collar uncut. R.{Sir Henry Royce} For sketch see original. | ||