Abstract: A rotation detecting device that includes an electric power generator having a stator and a rotor, said rotor having a plurality of alternating opposite magnetic poles in a circumferential direction of the rotor, at least a first magnetic sensor mounted on either the stator or a support member for supporting the stator and operable to detect the alternating opposite magnetic poles in the rotor; and an electric power supply circuit for utilizing an electric power generated by the electric power generator as an electric power source for the at least first magnetic sensor.

Abstract: An electromagnetic counter includes an electromagnetic counting mechanism in a frame, a plurality of number wheels at least one of which is configured to rotate through a predetermined angle in response to rotation of an electromagnetically motivated anchor, wherein each of the number wheels is disposed proximate a window provided in the front of a frame enclosing cover to form a readable display section. A mounting board supports a light emitting diode for illuminating the display section, and a wiring pattern that supplies electrical power to the light emitting diode. A reflective surface is provided on at least one of an internal surface of the cover member to reflect light from the light emitting diode toward the numbered wheels, the periphery of one or more of the numbered wheels, and indicia formed in the numbered wheels, to render the number wheels readily readable when illuminated by the light emitting diode.

Abstract: A counting scheme for a non-volatile counter includes automatic point-of-reference generation implemented in a state machine. Two state variables are used to store the rotation history of the magnet. One variable stores the previous position of the magnet and the other stores the net angle traveled by the magnet from the reference point. The first pulse location after the counter is reset is automatically selected as the reference point until the next counter reset. When the nonvolatile counter counts up or down, i.e. when the magnet travels 360° in either direction, the second state variable is set to zero and the first state variable is set to the reference point, indicating the start of a new revolution.

Abstract: An electromagnetic counter includes a case, an electromagnet, an anchor rotatable through magnetization and demagnetization of the electromagnet, and number wheels rotated by a predetermined angle according to the rotation of the anchor. A flexible board with a light emitting diode is disposed in a confined space in the case for illuminating the number wheels.

Abstract: An electromechanical pulse counter for counting applied current pulses includes a magnetizable disc-shaped armature mounted for rotation about a fixed axis. Magnetic stepping poles diametrically disposed adjacent the circumference of the armature are momentarily magnetized by a magentic winding upon application of each current pulse to establish diametrically opposed magnetic poles in the armature. Permanent indexing magnets diametrically disposed adjacent the circumference at an angular position relative to the stepping poles magnetically coact with the magnetic poles established in the armature following each current pulse to cause the armature to rotate to align the established magnetic poles with the poles of the indexing magnets. Each subsequent current pulse causes another pair of diametrically opposed magnetic poles to be established in the armature, and the armature to subsequently rotate to align the newly established magnetic poles with the indexing magnets.

Abstract: A semiconductor device comprising first and second transistors connected in series with one another to pass a primary current upon receipt of a control signal at the gate of the second transistor. The first transistor is coupled to receive a base current from a secondary power source. A third transistor is coupled to have a primary current path to shunt the base current away from the first transistor upon conduction of the third transistor. A capacitor is connected between the base of the third transistor and the base of the first transistor so that, at the moment the second transistor ceases conduction in response to the control signal, a voltage gradient is generated between the base of the first transistor and the base of the third transistor, causing the current from the secondary power source to charge the capacitor and thus render the third transistor conductive, thereby shunting the base current from the secondary power source away from the base of the first transistor.

Abstract: In an electromotive control device having an end disconnect switch, two circular conductive paths are arranged on an insulating support, at least one of said paths being less than an entire circle. Wiper contacts which connect the conductive paths are electrically connected to each other and are connected to a wheel which is driven by a motor, the wheel being mounted coaxially to the conductive paths. The limit disconnect switch and thus a setting element can be manufactured at low cost by the invention.

Abstract: A semiconductor device comprising first and second transistors connected in series with one another to provide a path for a primary current upon receipt of a control signal at the gate of the second transistor. The first transistor is coupled to receive a base current from a secondary power source. A third transistor is coupled to have a current path which shunts the base current of the first transistor upon conduction of the third transistor. A zener diode is connected between the base of the third transistor and the common junction of the first and second transistors and is arranged to provide base current to the third transistor thereby causing the third transistor to be conductive upon turn-OFF of the second transistor, and as a consequence quickly turning OFF the first transistor.

Abstract: An odometer for use by a golfer in the measurement of distance covered by each shot. The odometer attaches to the wheel of the cart and counts revolutions or parts of a revolution of the wheel through the use of a magnetic head that rotates past a Hall effect sensor. A digital readout indicator displays yards covered.

Abstract: A pulse generator unit for a fuel pump register employs a pulser shaft driven by a pulser drive gear rotatable with a lowest order counter wheel. A permanent magnetic means at the end of the pulser shaft rotates and actuates a reed switch to produce a pulse train having pulses indicative of rotation of the counter wheel. A ratchet clutch assembly is employed to selectively permit rotation of the pulser shaft in a counting direction and a resetting direction.