Patent GB-220878-A (GB)
Title: Improvements relating to recording apparatus
IPC: G07C5/06
Filed: 1924-01-03
Abstract: 220,878. Lehwess, E. E. Jan. 3, 1924. Speed indicators with recording-apparatus; recording rest or motion.-In recording-apparatus of the type in which the casing is formed in two parts hinged together, the movable hinged part is arranged to contain a gear train for actuating the recording stylus or perforator whilst the fixed part contains the clockwork for driving the record disc and also a gear train driven by the vehicle or machine and adapted to be brought into mesh with the gear train in the movable part when the casing is closed. Means are provided for producing two records on the disc, one record being made by a positively driven recorder when the vehicle &c. is in motion, and the other by a vibration-responsive device when the vehicle or its driving engine are in motion. The casing consists of two parts 1, 2, hinged together at 3, the lower part 1 being secured to a suitable bracket by a bayonet joint 5 and locked in position. Figs. 1 and 2 show an arrangement in which the positively produced record 40 of rest or motion is made on a card 11 by a marking stylus 50, and Fig. 3 an arrangement in which the record is made by a perforating punch 72. A flexible shaft driven by the vehicle or machine is connected at 6 to a spindle having a worm 7 meshing with a wheel 8 which drives through gearing a spindle 102 having a bevel wheel 9 adapted to mesh with a bevel wheel 10 in the upper half of the casing when the latter is closed. A worm on the spindle of the wheel 10 drives through gearing 44, 46 a cam 47 which rocks a lever 48 carrying the stylus 50. A zig-zag line 40 is thus marked on the record disc when the vehicle is in motion. The gearing between the worm 7 and the spindle 102, and the gears 44, 46 and the cam 47 may be changed to suit different conditions. In the modification shown in Fig. 3, the perforating punch 72 mounted on a cam-operated lever 48 is actuated by a lever 69, one end of which is engaged by a lever 67 which is rocked bv teeth on a cam 64 rotated bv the wheel 44. A pin-and-slot connection permits some lost motion between the wheel 44 and the cam 64. Bevel gearing may be substituted for the worm gearing 7, 8. The vibration-responsive device by which the record 42 is made when the vehicle or engine are in motion consists of a balance weight 20 mounted on the shaft of the worm 7, and connected by a lever 22 to a marker or perforator 51. This device may be rendered inoperative by a screwed stud 82. The easing of the instrument is positively vibrated to obtain this record by an eccentric on a shaft driven by the engine or by other means. The clockwork driving the record disc 11 is housed in the lower part 1 of the casing and the disc is fixed in place by pins on coacting parts. Gearing 12, 16 is provided for actuating time-indicating hands 18, 19. Opening and closing of the casing is recorded on the disc by a cutter passing through a guide 81. A speed record may be produced by mechanism connected with the balance weight 20 or by other means, and a visible or audible excess speed alarm may be provided. Registering distance upon counters.-A mileage register is actuated by a lever 52 having a pivoted finger 56 adapted to be engaged by pins 57 on the gear 46.