GB184927A - Improvements in apparatus for recording and registering the movements of vehicles, machinery and the like - Google Patents

Abstract

184,927. Bruhn, F. W. G. June 11, 1921. Disc recording-apparatus.-In an instrument for recording upon a clock-driven disc the revoit.- tions made or distance traversed the moving or stationary condition of the machine or vehicle is separately recorded upon the disc by means of a vibration-responsive element. Provision is made for varying the rate of drive for the recorddisc and for recording the times, during whicn the rates are respectively operative. The recorddisc placed upon a fixed central plate 54 provided with retaining lips 55, is rotated by a pinion 68 driven from the clockwork 51 and bearing upon the rear face of the disc. By sliding a fingerpiece 73 connected to a clutch arm 72, the pinion can be shifted along its axis so as to gear with either of the crown-wheels 66, 67 and thus rotate the record-disc at one of two different speeds to receive either a 12-hour or a 24-hour record. The disc is maintained in driving contact with the pinion by means of a two-grooved bobbin 82<1> carried bv a spring-controlled pivoted arm 80, and is incidentally marked by the pinion along the inner or outer margin of the annulus 79. The distance and motion-recording punches 11, 13 operate along the edge of the curved abutment 16, normally held against the disc but displaced for accessibility thereto when the cover is removed. The drive from the vehicle wheel intermittently rotates, through an eccentric forked lever 22 and pawl 27 an interchangeable ratchet wheel 9 mounted on a shaft 30 and geared through a worm 32 with the odometer 19. The perforator 11 is carried by one arm of a bellcrank lever 40 caused to rock by a cam 37 fixed on the live spindle of the odometer and is inter mittently struck to perforate the record-disc by means of a hammer 42 operated from a ratchetcam 33 on the shaft 30. The perforator 13 is mounted on one end of a spring-controlled bell. crank ]ever 47 having at its other end a weight 42 a record of in-motion thus being punched along the outer edge of the record disc at as 15. To start the clockwork when re-winding the winding-ratchet 59, Fig. 5, carries a spring- controlled pawl 61 adapted during the winding- movement to engage and trip past a pin 63 and strike a lever 65 to cause it to flick the balancewheel 57.