Position responsive signal generator

摘要: 1,199,063. Position encoders. J. F. SCHUGT. 7 July, 1967 [8 1966], No. 31508/67. Heading G4H. [Also in Division G1] A transducer for measuring angular speed or position comprises a circular rotatable disc having elements 14 around its periphery which affect the coupling between coils 11, 12 wound on ferromagnetic cores 44, 51, flux path being confined to increase sensitivity of by surrounding each coil with conductive shield except narrow areas defining path. Thus are surrounded shields 40, 41, 45, 53, 49, 41 made wholly material, e.g. aluminium, gaps 42, 43 provided return flux. Shields 49 may also be material 50, 56 Alternatively, they copper coated insulating fibre glass, coating etched away provide necessary gaps. The slots omitted, cylindrical increased diameter include transverse shot and 53 within circumference so that lies inside shields. Insulating end plates 56, 60 arranged at remote ends coils, carrying terminals 57, 58, 61, 62 coils. assembly is held potting compound attached supporting member 33, Fig. 3 (not shown). rotating teeth combination both, inlay. Alternatively segments (72), 6 shown), printed round periphery. In operation 11 connected output an H.F. oscillator, forming regenerative feedback absence tooth oscillator maintained oscillation stops oscillating wnen positioned from ocillator fed via demodulator Schmidt trigger circuit square wave output. multivibrator whose oscillations will only