GB452415A - Improvements relating to hydraulic transmission gear - Google Patents

Abstract

452,415. Hydraulic transmission of power. FOTTINGER, H., 172, Berlinerstrasse, Charlottenburg, Berlin. Dec. 21, 1934, No. 36771. Convention date, Dec. 21, 1933. [Class 69 (ii)] In hydraulic transmission gear consisting of two torque-converters or couplings or of the combination of a torque-converter with a coupling in which a change of speed is effected manually or automatically, a device is provided which is dependent for its operation on the ratio between the speeds of the primary and secondary shafts ; such device either gives a signal for the changing of gear, or allows the gear change to be effected. In the form shown in Fig. 1, the primary and secondary shafts 2, 8 drive shafts 1, 7 ; when the predetermined speed ratio is attained, a disc 10 carried by a nut 9 on the screwed shaft 7 and in contact with a tapered roller 5 on the shaft 1, completes an electric circuit at 11 for giving a visible or audible signal. The contact 11 is adjustable, on a guide 13. In the form shown in Fig. 2, the primary and secondary shafts act on differential gearing, and the casing 18 carries a pinion 19 ; when the predetermined speed ratio is attained, the casing 18 is stationary, and a spring 27 acts to move a gear-wheel 20 into engagement with the pinion 19, so that the movement of the lever 24 gives a signal, or the gear change is allowed to be effected manually or automatically. Specification 440,412 is referred to. The Specification as open to inspection under Sect. 91 comprises also other arrangements. As shown in Fig. 4 (Cancelled), centrifugal governors 24, 25 act on a control member ; the latter may also be operated by a spring 33 or piston 35, and the control member may consist of a slide valve coaxial with the shafts I<1>, II<1>. In a further form, centrifugal impellers 42, 43, Fig. 6 (Cancelled), force liquid to act in opposite directions on the slide valve 53, throttle valves 55, 56 being provided. This subject-matter does not appear in the Specification as accepted.