Patent GB-400354-A (GB)
Title: Improvements in or relating to transmission mechanism for distance indicators or odometers
IPC: B60Q1/54
Filed: 1932-07-01
Abstract: 400,354. Electric speed-indicators. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, and GRIFFITHS, L., 78, Biggin Hall Crescent, Coventry. July 1, 1932, No. 18670. [Class 106 (iii).] A revolution counter or a vehicle mileageindicator is driven by worm reduction gear from an extension of the spindle of an electric speed-indicator of the type shown in Specification 395,404, [Group XXXV]. To the end plate fixing bolts 7 of the speed-indicator is secured a base plate 1 which carries a bracket 2 and a fixed spindle 6 supporting a double reduction worm gear. The final worm wheel 5 mounted on the spindle 6 may be connected by a flexible drive to a counter or mileage indicator. 400,381. Speedometers. ETABLISSE. MENTS E. JAEGER, 2, Rue Baudin, Levallois-Perret, Seine, France. Aug. 10, 1932, No. 22412. Convention date, March 21, 1932. [Class 106 (iii).] A combined eddy-current type speedometer and partial and general distance totalizers has the magnetic circuit completed outside the drag bell by a soft iron disc, on the front side of which is secured a U-shape frame carrying in its side faces the ends of the shafts of the totalizers and on the back side of which is secured a rear frame forming a bearing for a shaft carrying the magnet and for shafts actuating pawls operating the totalizers. The apparatus is similar in many respects to that described in Specification 290,218, [Class 106 (iii), Fares &c.]. The rotating shaft 16 rotates the crossshaped permanent magnet 17 to actuate the metal drag bell 27, the shaft 26 of which carries the index 73 moving over the dial 74 which is secured by pillars 75 to a soft-iron disc 30 closing the magnetic circuit of the magnet 17 through the flat bottom of the bell 27. To the front of the disc 30 is secured the iron U-shaped frame 1 carrying in the upper branches 2b, 3b of its side faces the shaft 8 of the partial totalizer &c. carrying in the lower branches 2a, 3a of its side faces the shaft 7 of the general totalizer. The partial totalizer may be omitted if desired. To the back of the disc 30 is secured a rear frame 82 supporting the shaft 16 and the shafts 9a, 9b having secured to them wheels 19a, 19b, respectively, rotated by a worm 18 on the shaft 16. The shafts 9a, 9b actuate by eccentrics the pawls, 46, 46a, respectively, which operate the general and partial totalizers, respectively. The pawls, 46, 46a are guided in grooves 79, 80, respectively, of the disc 30 and are controlled by springs 77, 76, respectively. The frame 82 is composed of two branches displaced relatively to each other so that the wheels 19a, 19b can be arranged in a common vertical plane passing through the axis of the shaft 16. The shaft 16 is retained by a fork member 21 as described in Specification 290,218. The partial totalizer can be zeroized by means of the rod 52 which can be pushed upwardly against the action of a spring 56 to put the pinion 55 fast on the rod 52 into engagement with the pinion 58 fast on the shaft 8 of the partial totalizer and to cause the abutment 83 on the rod 52 to come into engagement with the pin 84 and release the pawl 46a to allow rotation of the shaft 8.