Patent GB-1307694-A (GB)
Title: Programming apparatus for switching predetermined electrical  equipment
IPC: G04C21/28
Filed: 1970-02-24
Abstract: 1307694 Timed switching and control MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 24 Feb 1970 [28 Feb 1969 16 April 1969 25 April 1969(2) 22 May 1969(3) 23 May 1969] 8911/70 Heading G3T [Also in Divisions G4 and H3] A programming apparatus such as for a radio or television receiver comprises a time signal generator 2 generating a plurality of time signals, a memory device 21 holding a driving device such as a motor 39 in a driven state, a first changeover switch 45 driven by the driving means 39 and having a group of fixed contacts a-e connected to respective electrical equipment 40-44 to be set, a second changeover switch 3 coupled to the first switch 45 and having its group of fixed contacts a-e connected to the time signal generator 2 whereby on contact of a movable contact f of the second changeover switch 3 with that one of its fixed contacts which is supplied with the time signal, this time signal resets the operation of the memory device 21 to stop the drive of both the changeover switches and/or the driving device. The time signal generator 2 is driven by a clock 1 and on closing of any switch S1 a negative pulse is fed via OR gate 4 to two transistors 23 and 22 off and on. Transistor 36 also turns on to switch on motor 39 which drives the movable contacts f of the changeover switches 3, 45 until it contacts the fixed contact a to which the time signal is applied. Then a negative pulse is fed via capacitor 34 to turn memory transistors 22, 23 off and on and transistor 36 off to stop the motor 39. The timing voltage on the selected potentiometer 40 is then fed via switch 45 to a variable capacity diode 47 in a radio receiver 46. Manual control of the motor 39 and the frequency selection by switch 45 can be controlled by a switch 56. In a modification Figs.2 and 4 (not shown) the motor 39 is replaced by a transistor oscillator (69) actuating on electromagnet (67) which stops movable contacts f of the switches 3, 45 over their fixed contacts. The oscillator (69) is turned on and off by a transistor (53) under control of the memory 21 and time signal generator 2. The time control may be over-ridden by a switch connected to control the bias transistor (53) or alternatively the electromagnet 67 may be momentarily actuated by momentarily closing a switch (57) to charge a capacitor (68). To provide control independent of the time control, switches (511-515), Fig. 6 (not shown), may be connected across each switch 51-55 of the time signal generator 2. In a further modification Fig. 5 (not shown) the motor (80) drives the changeover switches 3 and 45 via gearing (77, 78) and manual adjustment to the switches 3, 45 can be made by a knob (79). The switch 45 may alternatively be connected to switch in individual variable capacitors (83-87) Fig.7 (not shown), or inductors. Additional changeover switches (93, 95, 96), Figs. 8, 9 and 10 (not shown), may be coupled to the switch 3 for selecting radio, tape recorder, electric washer, electric rise boiler, stereo player or predetermined FM or AM bands or predetermined on or off condition of the radio. The rotary changeover switches 3, 45 may be replaced by slide changeover switches, coupled to each other and driven by the driving means. The time signal generator 2 may use a clock motor and spring, may include a drum having contacts on its periphery or may have switches controlled by a transistor or diode operated in proportion to the supply frequency.