Abstract: A shape memory actuator includes a shape memory actuator element for biasing an actuated member from an initial rest position to an operative position against the action of return spring means. Holding means are associated with the actuator element for holding the actuated member in its operative position even when the shape memory actuator element is deactivated. These holding means can be deactivated with a subsequent activation of the shape memory actuator element, allowing the actuated member to return to its rest position.

Abstract: A high-speed counter circuit comprising an input line for inputting a clock signal, at least two bit counters for generating a count value of at least two bits in response to the clock signal from the input line, at least one clock synchronizing circuit responsive to an output signal from at least one higher-order bit counter of the at least two bit counters, for transferring the clock signal from the input line to a lower-order bit counter of the at least two bit counters, and a delay circuit for delaying the clock signal from the input line by a propagation delay time of the at least one clock synchronizing circuit and applying the delayed clock signal to a highest-order bit counter of the at least two bit counters. According to the present invention, the high-speed counter circuit can minimize a delay time from the application of the clock signal to the generation of the count value to enhance the operation speed.

Abstract: A thermal cut-off fuse of a self-restoring type, which breaks the electric continuity between a pair of lead wires in response to melting and voluminal expansion of a temperature-sensitive member upon rise of the ambient temperature to a prescribed temperature and, in response to restoration of spring means upon fall of the ambient temperature below the prescribed temperature, reestablishes the electric continuity between the pair of lead wires.

Abstract: A pair of conductors in an electric switch are kept in electrical contact by a wire gripped between the conductors and a base against which the conductors are biased. A pedestal of meltable material in a well, covered by a resilient sheet, supports the base in its position. A spring urges the wire out of engagement with the conductors, and is successful when the pedestal melts and fails to support the base, the base meanwhile distorting the resilient sheet. After the disengagement of the wire from the conductors, the pedestal resolidifies in its original shape as the resilient sheet regains its configuration. A reset button is coupled to re-engage the wire with the conductors.

Abstract: If the pressure switch pre-loading cam has been set for a level above medium the pressure switch is returned to medium after completion of the wash cycle by momentary energization of the solenoid to unlatch the slider from the lobed cam. The slider carries the high and extra high settings and when it is disconnected from the cam the torsion spring on the cam shaft can drive the cam back to medium by pushing the slider out of the way. This arrangement prevents inadvertent repeated use of the higher water level settings, thus preventing inadvertent use of hot water.

Abstract: A circuit interrupter has a pair of contacts, a self-restoring type current limiting element and a first electromagnetic trip device serially interconnected. The current limiting element is connected across a parallel connected resistor and a second electromagnetic trip device. Both trip devices have a common magnetic circuit including a single stationary core and a single movable iron piece. The first trip device responds to a shortcircuiting current flowing through it to open the contacts but the second trip device is operative to open the contacts only after the current limiting element has performed the operation of limiting a shortcircuiting current.