Control receiver

• US 3,886,377 A
• Filed: 08/03/1973
• Issued: 05/27/1975
• Est. Priority Date: 08/09/1972
• Status: Expired due to Term

• Current Assignee: Katsumi Taketa, Kenji Takahashi
• Original Assignee: Katsumi Taketa, Kenji Takahashi
• Inventors: Takahashi, Kenji, Taketa, Katsumi
• Primary Examiner(s): Hix, L. T.
• Application Number:
  US05/385,243
• Time in Patent Office: 662 Days
• Field of Search: 307/129 317/147,138
• US Class Current: 307/129
• CPC Class Codes: G05B 19/04 Programme control other than numerical control, i.e. in sequence controllers or logic controllers G05B19/418 takes precedence
• CPC Class Codes: H02J 13/00009 using pulsed signals
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/00 Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission

Abstract

A receiver comprises two mechanical resonators resonating at transmitted frequencies different from each other and two coils coupled to them respectively. At one of the frequencies, the corresponding resonator causes the mating coil to produce a voltage which is applied to a switching thyristor to rotate an AC motor. After the rotation of the motor through a predetermined angle, a switch is closed to permit the energization of the associated load while stopping the motor. At the other frequency, the remaining resonator and mating coil are similarly operated to deenergize the load. There are also disclosed means for controlling an operating time point of the switch.

Claims

1. A control receiver comprising, in combination, a first electromagnetic coil responsive to a signal having a first predetermined frequency to provide an output voltage thereacross, a second electromagnetic coil responsive to a signal having a second predetermined frequency different from said first frequency to produce an output voltage thereacross, a load circuit to be controlled, switch means connected in said load ciRcuit and having an open position to open said load circuit and connect said first coil to said load circuit, and a closed operating position to close said load circuit and connect said second coil to said load circuit, a switching circuit connected to said first coil and said second coil and rendered conductive by the output from that coil connected by said switch means to the load circuit, and means responsive to the conduction of said switching circuit to change said switch means from one to the other of the open and closed positions.

2. A control receiver as claimed in claim 1, further comprising a signal responsive circuit responsive to the signal having either of said first and second predetermined frequencies to establish an oscillating magnetic field therein, first mechanical resonator means operatively coupled to both said signal responsive circuit and said first coil to respond to the magnetic field established in said circuit at said first frequency to cause said first coil to produce the output voltage across the latter through the vibration of said first resonator means and second mechanical resonator operatively coupled to both said resonance circuit and said second coil to respond to the magnetic field established in said signal responsive circuit circuit at said second frequency to cause said second coil to produce the output voltage across the latter through the vibration of said second resonator means.

3. A control receiver as claimed in claim 1, further comprising an electric motor driven during the conduction of said switching circuit, circuit means having a motor switch controlling the flow of electricity to said motor, first cam means rotated by said electric motor and having a predetermined rotational position for switching said switch means to said open position, and another predetermined rotational position for switching said switch means to said closed position, second cam means disposed for rotation with said first cam means and coactive with said motor switch and having a predetermined rotational position where said motor switch is opened to stop said electric motor, and means for adjusting the angular position of said second cam means relative to said first cam means.

4. A control receiver device as claimed in claim 3, further comprising a supporting member rotated along with said first cam means, means adjustably fixing said second cam means to said supporting member, and adjusting means for adjusting the relative position of said second cam means to said supporting means.