CONTROL MEANS FOR PULSE GENERATING APPARATUS

• US 3,569,727 A
• Filed: 09/30/1968
• Issued: 03/09/1971
• Est. Priority Date: 09/30/1968
• Status: Expired due to Term

• Current Assignee: Unison Industries Limited Partnership
• Original Assignee: Aggarwal Rattan, Louis H. Segall
• Inventors: AGGARWAL RATTAN, Segall, Louis H.
• Application Number:
  US04/763,569
• Time in Patent Office: 890 Days
• US Class Current: 307/106
• CPC Class Codes: F02P 15/003 Layout of ignition circuits for gas turbine plants ignition of gas turbine plants per se F02C7/26

Abstract

A condenser discharge type electrical pulse generating circuit, such as for a combustion engine ignition system, in combination with means for automatically disabling said circuit after operation for an interval within a predetermined range, the combination being such that the disabling means may be selectively bypassed and such that recycling of said means may be effected following an interruption of power input.

Claims

1. Electrical apparatus comprising a source of electrical energy, an electrical pulse generating circuit, means connecting said source to said circuit to energize the latter for generating pulses, and means powered by the energy of the pulses generated in said circuit for varying the resistance of said connecting means sufficiently to effectively reduce the energization of said circuit by said source below that required for the generation of pulses therein while current flow through the connecting means is continuous.

2. Electrical apparatus as defined in claim 1 wherein said pulse powered means comprises energy storage means and means coupling said circuit to said storage means for charging the latter.

3. Electrical apparatus as defined in claim 2 wherein said storage means comprises a capacitor adapted to be incrementally charged by pulses in said circuit.

4. Electrical apparatus as defined in claim 3 wherein said pulse powered means further comprises a control gap and a solenoid coil connected in series across said capacitor.

5. Electrical apparatus as defined in claim 4 comprising switch means in said source-to-circuit connecting means adapted to be electromagnetically actuated in response to energization of said solenoid coil by the discharge of said capacitor through said coil.

6. Electrical apparatus as defined in claim 5 comprising a solenoid coil in said source-to-circuit connecting means for holding said switch means in the position to which it is actuated by said first-named solenoid coil.

7. Electrical apparatus as defined in claim 3 comprising circuit means connected across said capacitor for dissipating the charge thereon and means connected to be energized by said source for interrupting said circuit means.

8. Electrical apparatus comprising a source of electrical energy, an electrical pulse generating circuit, means connecting said source to said circuit to apply voltage thereto of sufficient potential to generate pulses therein, and means powered by the energy of the pulses generated in said circuit to reduce the voltage applied to said circuit to a potential below that required to generate such pulses in said circuit while current flow in said connecting means is continuous.

9. Electrical apparatus as defined in claim 8 wherein said source-to-circuit connecting means comprises normally closed switch means, anD including solenoid means for electromagnetically actuating said switch means.

10. Electrical apparatus as defined in claim 9 wherein said solenoid means comprises a first winding energizable by said pulse powered means to actuate said switch means to open position.

11. Electrical apparatus as defined in claim 10 wherein said solenoid means comprises a second winding in said source-to-circuit connecting means energizable by said source to electromagnetically hold said switch means in open position.

12. Electrical apparatus as defined in claim 8 wherein said pulse generating circuit includes a capacitor adapted to be intermittently charged and discharged and wherein said pulse powered means comprises energy storage means connected to be incrementally charged by the discharges of said capacitor.

13. Electrical apparatus as defined in claim 8 wherein said source-to-circuit connecting means comprises first and second branches adapted to be connected in parallel, one of said branches including normally closed switch means.

14. Electrical apparatus as defined in claim 13 comprising means for normally holding said switch means in a first position to close said first branch, and electromagnetic means including a solenoid winding for actuating said switch means to a second position to open said first branch.

15. Electrical apparatus as defined in claim 14 wherein said second branch is permanently closed.

16. Electrical apparatus as defined in claim 14 comprising means powered by the energy of pulses in said circuit for energizing said solenoid winding to actuate said switch means to open said first branch.

17. Electrical apparatus as defined in claim 16 wherein said electromagnetic means includes a solenoid winding in said second branch, the magnetic field of which is insufficient to actuate said switch means from its first to second position but is sufficient to hold said switch means in said second position.

18. Electrical apparatus as defined in claim 17 wherein said pulse powered means comprises energy storage means connected to be charged by energy supplied from said circuit and means for controlling the discharge of said energy storage means through said first-named solenoid winding.

19. Electrical apparatus as defined in claim 4 comprising normally closed switch means in said source-to-circuit connecting means adapted to be opened in response to the discharge of said capacitor.