Patent GB-190817265-A (GB)
Title: Improvements in Printing Devices connected with Speed Indicators.
Inventor: HOEFT MAX
Filed: 1908-08-17
Granted: 1909-04-01
Abstract: 17,265. Hoeft, M. Aug. 17. Speed indicators.-In speed indicators provided with means for printing the speed &c., the printing operation is performed by a vehicle-driven shaft which is automatically coupled to the mechanism by the speed indicator. Means are provided whereby a record of the speed is taken when any of the operating-parts of the automobile are moved and also a record is made of the part operated. A disk 53, Fig. 1, oscillated by the speed indicator, is provided with pins 56 which engage with a spring pawl 81 carried by a lever 80. The forward movement of the pins moves the lever against its spring 80<a>, a second spring pawl 81<a> serving on its return to move a star-wheel 82 through half the distance between two teeth. A pin 84 on a vehicle-driven disk 83 completes the movement of the wheel 82 and causes one of the teeth to strike the end of a lever 85 and rotate a shaft 72 through a projection 71. The movement of the shaft 72 is conveyed through bevel-gearing to a shaft 74 on which is mounted a cam 75, which depresses a platen 77 on to type-wheels 69. To print the speed each time one of the operative parts is employed, each part is provided with a rack 57, rotating a shaft 58<b> through pawl and ratchet gearing when moved in either direction, this movement being communicated by spur-gearing to a wheel 67 provided with projections 68 which engage a projection 70 on the shaft 72. At the same time a special sign is printed to indicate the part used. The record strip is fed forwards by a bell-crank 86 engaging with the lever 85 by a pin and slot. A spring pawl 87<a> on the lever serves to give a star-wheel 88 a half movement, the movement being completed by the pin 84. A lever 89 actuated by the wheel 88 communicates the movement to a ratchet-wheel 92 and feeds on the strip. The movement of the wheels 82, 88 is controlled by springs and star-wheels having double the number of teeth. In a modification, the shaft 74 and cam 75 are replaced by a hammer 77 as shown in Fig. 4. The star-wheel 82 may be replaced by a planet-gear consisting of a ratchet-wheel 101 driven from the vehicle by a wheel 112 and pinions 113 engaging internal crown teeth. The pinions are mounted on a disk 114 provided with a pin 102. The movement of the disk 53 rocks a lever 99 which releases an arm 100 and allows it to fall into gear with and lock the wheel 101, thus causing the disk 114 to revolve and the pin 102 to lift a lever 103 connected to the printing-hammers. The downward movement of the lever 103 raises a pawl 104 which lifts the lever 100 and brings the pin 105 into engagement with the catch 99. The operative parts are connected to the printing-mechanism through bars 57, which operate levers 107 as shown in Fig. 4. In a second modification, shown in Fig. 6, the vehicle shaft and the printing-devices are coupled by electro-magnetic devices. The star-wheel 53 acts upon one of the levers 80 according to its backward or forward movement and completes a circuit through a plug a. This causes a magnet r to attract a lever p and rock a second lever c, thus releasing a wing g and allowing a cam h to be turned by a spring so as to release a pin on a pawl k. This allows a lever 100 to fall, the printing being performed by suitable mechanism. The lever 100 is raised by the pin 84 on the disk 83, and the spring actuating the cam h is rewound by a pawl m on a lever l, which is reciprocated by the projection on the lever 100. When any operative part is employed the circuit is again closed and the process repeated. Specification No. 25,379, A.D. 1905, [Abridgment Class Lifting &c.], is referred to.