Electromagnetic driving system for timepieces

Claim 2

In an electromagnetic driving system for timepieces having permanent magnets and coil means relatively movable against each other by means of a mechanical oscillator: an electronic circuit comprising; a pair of complementary transistors having their collectors connected to said coil means to form a series circuit; a direct current source connected between the emitters of said transistors to complete a series loop and biased to enable current flow through said loop; and circuit means connected between said coil means and the bases of said transistors for turning on said transistors in accordance with a signal generated by the relative movement of the permanent magnets and coil means.

Claim 3

The system of claim 1 further including means connected across said coil means for providing a predetermined switch-on time for said transistors.

Claim 4

The system of claim 2 wherein said last named means comprises a capacitor.

Claim 5

The system of claim 1 wherein said circuit means comprises a first resistance means connected between said coil means and a base of one transistor.

Claim 6

The system of claim 4 wherein said circuit means further includes a second resistance means and a capacitance means connected between said coil means and a base of the other transistor.

Claim 7

The system of claim 1 further including a biasing potential means on at least one transistor base.

Claim 8

In an electromagnetic driving system for timepieces having permanent magnets and only one single coil relatively movable against each other by means of a mechanical oscillator a pair of complementary transistors, two capacitance means, at least two resistance means, a direct current source, the positive pole of which is connected to the emitter of the PNP-type transistor while the negative pole is connected to the emitter of the NPN-type transistor, and leadings connecting the individual components parts to each other as to form an electronic circuit, the imprOvement comprising the following features: a. the collectors of the two transistors are connected to each other through the coil, b. the collector of the PNP-type transistor is connected to the base of NPN-type transistor through the first capacitance means, c. The collector of the NPN-type transistor is connected to the base of the PNP-type transistor through the first resistance means, d. the emitter of the PNP-type transistor is connected to the base of the NPN-type transistor through the second resistance means, e. the second capacitance means is connected in parallel with the coil.

Claim 9

In an electromagnetic driving system for timepieces having permanent magnets and only one single coil relatively movable against each other by means of a mechanical oscillator a pair of complementary transistors, two capacitance means, at least two resistance means, a direct current source, the positive pole of which is connected to the emitter of the PNP-type transistor while the negative pole is connected to the emitter of the NPN-type transistor, and leadings connecting the individual components parts to each other as to form an electronic circuit, the imprOvement comprising the following features: a. the collectors of the two transistors are connected to each other through the coil, b. the collector of the PNP-type transistor is connected to the base of NPN-type transistor through the first capacitance means, c. The collector of the NPN-type transistor is connected to the base of the PNP-type transistor through the first resistance means, d. the emitter of the PNP-type transistor is connected to the base of the NPN-type transistor through the second resistance means, e. the second capacitance means is connected in parallel with the coil.

Claim 10

A driving system as defined in claim 7, wherein a third resistance means is series-connected to the first capacitance means.

Claim 11

A driving system as defined in claim 7, wherein each of the transistors is of the silicon type and has a biasing potential on its base.

Claim 12

A driving system as defined in claim 9, wherein each biasing potential is effected by a series connection of a capacitance means and a resistance means, the time constant resulting from said series connection having at least approximately the same value as the time constant resulting from the speed of the mechanical oscillator.

Claim 13

In an electromagnetic driving system for timepieces having permanent magnets and coil means relatively movable against each other by means of a mechanical oscillator: an electronic circuit comprising; a direct current source and only one single coil defining said coil means; a pair of complementary transistors; the emitter and collector of a first PNP transistor of said pair connected in series with said direct current source and said coil defining an output circuit; a series connection of a capacitance means, a first resistance means, and a second resistance means connected in said order between the collector and emitter of said first transistor; a second capacitance means connected in parallel with said coil; and controlling means including a second transistor of said pair for biasing said first transistor to condition and releasing the current flow through said coil only as said mechanical oscillator effects a predetermined half-oscillation, said second transistor having its base connected to said series connection at a junction between said first resistance means and said second resistance means, its emitter and collector inserted between said direct current source and said coil, and its collector connected to the base of said first transistor; and a third resistance means interconnecting the base of said first transistor with the collector of said second transistor.

Claim 14

In an electromagnetic driving system for timepieces having permanent magnets and coil means relatively movable against each other by means of a mechanical oscillator: an electronic circuit comprising; a direct current source and only one single coil defining said coil means; a pair of complementary transistors; the emitter and collector of a first PNP transistor of said pair connected in series with said direct current source and said coil defining an output circuit; a series connection of a capacitance means, a first resistance means, and a second resistance means connected in said order between the collector and emitter of said first transistor; a second capacitance means connected in parallel with said coil; and controlling means including a second transistor of said pair for biasing said first transistor to condition and releasing the current flow through said coil only as said mechanical oscillator effects a predetermined half-oscillation, said second transistor having its base connected to said series connection at a junction between said first resistance means and said second resistance means, its emitter and collector inserted between said direct current source and said coil, and its collector connected to the base of said first transistor; and a third resistance means interconnecting the base of said first transistor with the collector of said second transistor.