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).
Description of a motor-driven machine with an automatic cutting mechanism and lubrication system.
| Identifier | ExFiles\Box 176\3\ img170 | |
| Date | 9th October 1940 guessed | |
| B A special mechanism automatically knocks the cutter out of position at the beginning of the forward stroke, at the end of which stroke the cutter is forced back into position preparatory to the cutting stroke. At the end of each complete revolution of the index plate, the cutter is moved out a pre-determined amount, by means of a ratchet feed, preparatory to taking a deeper cut. The machine is driven by a motor mounted on an adjustable base beneath the bed. Reversal of feed is obtained through a belt shifting arrangement, acting on the two belts, one open and one crossed, driving the tight and loose pulleys on the machine. Two pulleys of different diameters are mounted on the motor shaft, the larger driving the open belt, the smaller driving the crossed belt. This gives the proper speed on the cutting stroke, and a rapid return. By means of a gear pump with integral pump motor, oil is pumped from the well and brought through the hollow cutter rod to the tool, after which the oil is strained and returned to the reservoir. | ||