Patent GB-356692-A (GB)
Title: Improvements in indicating and recording mechanism for use in connection with road vehicles
IPC: G01P1/12
Filed: 1930-04-03
Abstract: 356,692. Recording-apparatus SUTHERLAND, W. C., 306, Skipton Road, Keighley, and CAUTHERY, W., 20, Apsley Crescent, Bradford, both in Yorkshire. April 3, 1930, Nos. 10518 and 21847. [Classes 106 (iii) and 106 (iv).] Roller-and-sheet recording-apparatus.-In apparatus for use in connection with road vehicles for recording the speed, the distance travelled and the running time of the engine, the record-strip is advanced by clockwork through a pair of driving rollers with co-operating engraved surfaces whereby a time scale is marked on the strip. A clockwork mechanism 5, Fig. 1, actuates a wheel adapted to close contacts, say, once a second, in the circuit of a system of electromagnets which includes the electromagnet 7, Fig. 8. the energization of which through its armature 7a and pawl 7b actuates a ratchet-wheel 7c. This wheel is mounted on a spindle 9, Fig. 7, carrying a worm 9a gearing with a worm-wheel 9b, Fig. 6, on the spindle 3a of one of the driving rollers 3. The rollers 3, 4, have projections and indentations representing minutes, with additional co-operating parts to distinguish the quarter, half-hour, and hour periods. The record-strip 2 passes from a supply roll 2a, Fig. 5, between the rollers 3, 4, and is wound upon a spindle 2d, the tension on the strip being maintained by a ratchet wheel 10b actuated by a pawl on an arm 10 co-operating with a pair of pins 7f on the wheel 7c. The movement of the armature 7a is utilized to wind up the spring of the clockwork. Its end x co-operates with a projection on a spring- controlled pawl carrying arm 8a, Figs. 8 and 9 and operates a ratchet wheel 8c which is geared to the spring barrel. In addition to the time graduations, longitudinal lines are marked on the strip by a series of markers 25 mounted on a spring controller carrier. Periodic-counter speed indicators.-The spindle 9 carries a contact closing pinion 11 to energize an electromagnet the armature of which actuates a ratchet wheel 11 h loose on the spindle 9 but integral with a cam toothed wheel 11k. This wheel as shown in Fig. 17, co-operates with pins on a pair of levers 12, 12a pivoted respectively at s, s<1> and adapted at appropriate intervals to free pawls 12b, 12d from engagement with an associated rack element 12c and ratchet wheel 12f. The spindle 12g of this ratchet wheel is driven by a ratchet wheel 13, Fig. 1, actuated electromagnetically under control of contact members associated with one of the wheels of the vehicle. During a measuring period the wheel 12/, Fig. 16, drags forward the pawl 12d and with it the spring controlled arm 14 to which it is pivoted. A projection 14w on the arm cooperates with a second spring-controlled arm 14c on which the rack 12c is secured. Near the end of the measuring period the pawl 12b is released and the arm 14c moves to a position to engage the projection or is moved by it, whereupon the pawl is again engaged to hold the arm 14c in set position and the pawl 12d is released and returns to initial or zero position against a stop 14b. The position of the arm 14c is recorded by a marker 14f on an arm 14d pivoted to the arm. A member 17 operatively connected to the arm 14c is utilized to drive a sector gear and speed indicating pointer. Registering distance upon counters.-The spindle 12g is provided with a projection 19, Fig. 14, cooperating with a tappet 19a on a spring-controlled rod 19b which is coupled to the actuating arm of a counting-mechanism 20. Also mounted on the spindle 12g is a geai-wheel 18 in mesh with a wheel 18a to which is connected one end of a link 18b the other end of which is pivoted to an arm 18c carrying a marker 18d to produce a distance record. Recording rest or motion.-To record the time the engine is running a shaft geared down from the engine shaft rotates a cam to close contacts and energize an electromagnet to operate a perforator or other marker 21.