# US 4,377,151 A · Bipolar activated magnetic pulse timer

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- Number: US 4,377,151 A
- Document ID: US4377151A
- Status: Granted
- Kind: A
- Application number: 06/366,222
- Filed: 1982-04-07
- Granted: 1983-03-22
- Earliest claimed: 1981-07-13
- Inventors: Martin E. Gerry
- Web page: https://patentgrep.com/patent/US4377151A

## CPC

- F02P 3/005: {having inductive-capacitance energy storage (capacitive storage installations using an intermediate charging inductance F02P3/0876)}
- F02P: IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ({anti-pollution means for internal-combustion engines F02B17/00}; specially adapted for rotary-piston or oscillating-piston engines F02B53/12; {ignition of gas turbine plants F02C7/26; ignition of jet propulsion plants F02K9/95; starting of combustion engines F02N9/00}; ignition of combustion apparatus in general, glowing plugs F23Q; measuring of physical variables in general G01; controlling in general G05; data processing in general G06; electrical components in general see Section H; {ignition coils H01F38/12}; sparking plugs H01T13/00)

## Abstract

A bipolar activated magnetic pulse timer (50, Q.sub.a, Q.sub.b) is shown for an ignition system (Q1, Q2, Qn, Qp, 80, 90, 40, 40a) of a fuel burning engine. Such system includes a pair of semiconductor switches (Q.sub.a, Q.sub.b) wherein the output circuits of such switches are serially connected. A magnetic pulse timer (50) having an output winding (53) is connected to the input circuits of such switches. Such switches and timer intermittently activate a variety of ignition circuits.

## Claims

### Claim 1

A bipolar activated magnetic pulse timer for an ignition system of a fuel burning engine, comprising the combination of:
a pair of semiconductor switches of opposite conductivities, each of said switches having an input and an output circuit, the output circuits of said switches being serially connected; and
a magnetic pulse timer having an output winding, said output winding being connected to the input circuits of said switches.

### Claim 2 (depends on 1)

The invention as stated in claim 1, wherein one of said switches is of the NPN type and the other of said switches is of the PNP type.

### Claim 3 (depends on 1)

The invention as stated in claim 1, wherein one of said switches is of the NPN type and the other of said switches is of the PNP type, and wherein the serially connected output circuits constitutes the conection of the emitter of the NPN switch to the emitter of the PNP switch.

### Claim 4 (depends on 1)

The invention as stated in claim 1, wherein one of said switches is of the NPN type and the other of said switches is of the PNP type, and wherein connection of the output winding of the magnetic pulse timer to the input circuits of the switches constitutes the connection of said output winding to the bases of said switches.

### Claim 5 (depends on 1)

The invention as stated in claim 1, including a charging circuit comprising a power transistor, an inductor and a primary winding of an ignition transformer connected to each other, the output circuits of said switches being coupled to the power transistor.

### Claim 6 (depends on 1)

The invention as stated in claim 1, including an alternating current generator coupled to said output circuits, and an inductor and primary winding of an ignition transformer coupled to said alternating current generator.