Patent GB-190429556-A (GB)
Title: Speed Indicator and Recorder
Inventor: MEYERHOFER EMIL
Filed: 1904-12-31
Granted: 1905-02-16
Abstract: 29,556. Meyerhofer, E. Dec. 31. Speed indicators.-A speed indicator for motor cars is provided with a device for showing the speed in large figures visible from outside the car, a device for ringing a bell when a definite speed is attained, and with mechanism for printing the speed on tape when a change of speed takes place. A flexible shaft transmits motion from one of the road wheels to a shaft S, Sheet 1, carrying a governor A. The outward motion of the balls of the governor is resisted by two springs S<1> on the shaft S, which are separated by a loose ring R and are of different strengths. The sliding sleeve cf the governor is provided with two collars c<1>, between which is a pin P adjustably secured by means of two nuts in a slot in a toothed sector D. By means of pinions e, e<1> and wheels E, E<1>, the motion of the sector is transmitted to a drum F, on which is wound one end of a band W of black linen with white figures painted on it. The band W passes over guiderollers R<1> in front of a glazed aperture in the case, and is wound on a drum F<1>, provided with a barrelspring to keep the band in tension. At night, the figures on the band are illuminated by a lamp placed at the side of the case. On the sector D is a plate K, which, when a certain speed is exceeded, engages the end of a plate T and slides it back against the action of a spring o'. In an inclined slot in the plate T engages a pin p, fixed eccentrically in one of a pair of circular discs, which are mounted to turn in plates B' and are united by an eccentric axle U. A lever N mounted on the axle U has at one end the clapper O of a bell (not shown) and its other end is adapted to be engaged by a cam projection on the revolving shaft S, when the circular discs are turned by the pushing back of the plate T. The wheel E gears with a pinion J, on the shaft of which is a worm engaging a worm-wheel b on a shaft a. Fixed on the shaft a are two wheels d, e', the latter, Sheet 3, having marked on it the speeds and moving underneath a pointer r. Corresponding to these markings are printing-types on the edge of the wheel, and also square-cut notches in the wheel d. The edge of the wheel d engages a projection from a pivoted triangular piece e, throwing it to one side or the other and-thereby depressing an arm i and sliding the bar l against the action of a spring q. When a notch in the wheel d comes opposite the triangular piece e, the latter is released, allowing the spring q to throw the arm i against an inked printing-cloth g and a recording-tape p<2>, which is thereby pressed against the type-wheel e<2>. The receiving-roller for the tape is attached by means of a removable pin to a ratchet-wheel n, with which engage a spring pawl m on the slide. l and a spring pawl o on a fixed pivot. The tape is thus fed every time the piece i is depressed. The tape passes from the feeding-roller f over rollers 1, 2, 3, the last-named having a projecting rim which touches one of two rollers h, guiding the endless inked cloth g, and thereby drives the cloth when the tape is fed forward.