Patent GB-275807-A (GB)
Title: Improvements in or relating to recording apparatus
IPC: G01P1/12
Filed: 1926-09-16
Abstract: 275,807. Ach, N., and Wilichowski, G. Sept. 16, 1926. Recording by distinctive marks.-In apparatus for recording by printing measured values against time, such as speed, temperature, pressure, &c. the member which is moved in accordance with the value to be recorded is utilized to effect the release of a clock driven driving gear for the paper feed and impression mechanism, the said driving gear thereafter controlling the further printing operation. The measuring member is also caused to operate directly other marking members to produce a record of intermediate values. The invention is shown as applied to a speedometer on a vehicle and in addition to the records mentioned a record of the movements of the steering wheel may be produced, the wheel being associated with means for effecting the release of the driving gear. The clock which controls the driving gear is furnished with an adjusting device for correcting the time records. As shown in Figs. 1 and 2, the indicating shaft 1 of a speedometer carries a type wheel 2 and a pin wheel 4 the pins 5 of which are adapted to act upon a pair of pawls 6<a>, 6<b> rotatably mounted on a support 7 carried by a spring 8 secured to a shaft 9. The shaft 9 carries an arm 10 co-operating with a spring controlled arm 13 the free end of which has a cam face 16 co-operating with a pin 17 on a pivoted lever 18. The lever is provided with a catch pin 20 and an arm 21 that co-operates with a locking pin 22 on one member 23<a> of the clock actuated driving gear 23<a> - - 23<c>. The member 23<c> is provided with a roller 29 over which the record-strip passes and has a number of pins 26 adapted to act on a lever 27 carried by a shaft 49. Release of the driving gear is effected to advance the record strip when a pin 5 engages one or other of the pawls 6<a>, 6b and at the same time the rocking of the shaft 49 by the lever 27 actuates impression hammers 28<a>, 28<b> to print the speed from the type wheel 2 and the time from the clock driven type wheels 48<a> - -48<c>. In addition to the type printing dashes are also recorded by means of two printing levers 40<a>, 40<b> operatively connected to arms 42a, 42b with oppositely disposed pawls projecting into the path of the pins 5. If the speed is changing so slowly that the driving gear is arrested before the succeeding pin 5 meets the pawls 6<a> or 6<b> then as the new speed is reached the type printing hammers will be operated. If, however, the speed changes more quickly one or other of the dash printing hammers will be repeatedly operated before the succeeding type impression as shown in Fig. 5. Corresponding time and speed records may be connected by a line record produced by a bar 28<c> connecting the hammers 28a, 28b. In the zero position of the type wheel 2 a pin 47 on the wheel 2 co-operates with a bell crank lever 44<a> to throw one arm thereof into the path of a wind vane on the driving gear to lock it. To produce a record of the movement of the steering wheel the lattter is connected by gearing to a cam member 33 adapted to operate a lever 34 to effect the release cf the driving gear, and to a pinion 37 meshing wish a rack 38 carrying a recording pencil 39. A setting button 50 is provided for adjusting the clock to the correct time; the button is secured to a wheel 51, Fig. 3, on the spindle of which is loosely mounted a spring-controlled frame 53 carrying pinions 54<a>, 54<b> engaging the wheel 51 and adapted, in accordance with the direction of rota. tion of the button 50, to engage a wheel 55 of the clock train. At the same time the plate 53 through one or other of the arms 56<a>, 56<b> thereon operates levers 57 and 58 to effect the release of the driving gear and through a pivoted arm 60 and lever 60<a> prevents operation of the printing hammer 28a.