Patent GB-119583-A (GB)
Title: Improvements in Recording Instruments for Vehicles.
Inventor: KEMP WILLIAM EARL
IPC: C23D5/02
Filed: 1917-12-13
Abstract: 119,583. Kemp, W. E. Dec. 13, 1917. Time-distance recorders; combined with vehicle load-recording apparatus. - Apparatus for recording the speed of motorvehicles, so as to show stoppages, &c., and the condition of the vehicle under load, comprises a clock-driven strip engaged by two recording points, one being reciprocated by a connexion from a vehicle wheel and the other moved by the depression of the vehicle body due to the load carried. The strip, which is divided transversely for time and longitudinally for distance and load, is drawn over a clock-rotated drum 42 from a feed-roll 43, Fig. 3, carried by a spring-pressed pivoted arm 53, by a take-up roll 44 connected by spur-gearing to the drum. Moving in guides 62, arranged parallel to the longitudinal axis of the drum, are sliding heads 63 bearing spring-pressed recording- points and connected to levers 70 pivoted to spring-depressed posts mounted in the axes of face cams 73,107, and recording speed and load respectively. Mounted on one of the front vehicle wheels is a flanged cam 86, Fig. 18, reciprocating a spring-controlled plunger 89 flexibly connected to a second plunger'99 serving to rotate the cam 73 through a worm-wheel 92, a worm 93, an escape-wheel 94, and pallets 95 pivotally connected to the slide and the framework of the apparatus. Provision is made for changing the wheel 92 and cam 73 to adjust for different-sized vehicle wheels by mounting the axis of the cam 73 on a lever 75 pivoted at 76 and secured in the desired position bv a screw 77 engaging a slot 78. Rotation of the cam 107 is effected by a rack and pinion, the lack 115 being carried by a spring-controlled slide 116 flexibly connected to a plunger 136, Fig. 15, adapted to move in a casing 126 carried by the motor-truck. Secured to the rear and front vehicle springs are blade springs 120, Fig. 2, to which are attached the ends of a cable 123, the centre passing round pulleys 124, Fig. 1, on the truck, and pulleys 130, 129, Fig. 15, in the casing. The palleys 130 are secured to the body of the casing, and the pulley 129 is carried by a pivoted arm 128 therein formed with an arcuate slot 132 and provided with a spring 131 which tends to keep the arm in the position shown in full lines. Adjustably secured in the slot 132 is a link 134 pivoted at its other end to the plunger 136. The records of speed and load may be made on one strip or on two similar strips mounted side by side as shown in Fig. 21, both strips being divided transversely for time and longitudinally to represent distance in one case and load in the other. The load strip is graduated from 0 to 160 per cent., the normal load being represented by 100 per cent. In operation, when the vehicle is empty, the arm 128 occupies the position shown in dotted lines in Fig. 15, but during loading the arm 128 is rocked by the spring 131 to take up the slack occurring in the cable 123, thereby moving the plungers 136, 116 and tracing the record 143. The speed record 142 is produced by the parts actuated from the vehicle wheel, horizontal lines showing periods during which the vehicle is stationary.