Abstract: A user adjustable switching controller for duty cycle regulating flow of current to an electrical load such as a resistance heater, particularly for cooking appliances. A load current switch, when closed by a user operated cam also energizes a heat motor which includes a resistive strip attached to one active leg of a U-shaped bi-metal member. In one embodiment the integrally formed load current switch snap spring is securely attached to the heated leg of a U-shaped bi-metal and the moveable contact arm pivoted on the base. The other leg of the U-shaped bi-metal is anchored to a base including one of the load-connecting stationary terminals; and, the anchored leg serves to provide ambient temperature compensation. In another embodiment, the integrally formed blade spring of the moveable contact member is pivoted on the active leg of the U-shaped bi-metal and the moveable contact arm welded to the base.

Abstract: A system of monitoring and protecting integrated circuits against damage due to over temperature conditions functions to monitor the temperature of an IC and either shut down its input clock signal or assert its reset line if case temperatures rise to high. Heat dissipated by an integrated circuit is sensed by a temperature sensor. The temperature sensor is thermally coupled to the integrated circuit via thermal glue or other thermally conductive means. The output of temperature sensor is input to temperature sensor circuitry which converts the low level output of the temperature sensor into a signal that can be read by a processor. The processor is suitable programmed to monitor the output of temperature sensor circuitry. When the temperature of the integrated circuit rises past a predetermined threshold value, the processor outputs a control signal to the clock generator circuitry causing it to switch off its clock signal input by the integrated circuit or asserts the chips reset line.

Abstract: A time variable thermostat comprising, a housing, a clock connected to the housing and having a shaft which is rotatable with time and a disc connected to the shaft for rotation with the shaft. The disc has a plurality of circumferentially spaced slots each extending radially of the disc. A temperature responsive switch has an actuator movable with a change of temperature and the switch includes contacts which are closed and open depending on a position of the actuator. A double control arm is connected to the actuator and is movable with respect to the housing about a center of rotation and a pin slidably mounted to each slot and having a stop portion extending beyond the disc against which the control arm is engageable to influence closing and opening of the contacts. One arm includes a pin engagement portion movable in an arc with movement of the arm about the center of rotation.

Abstract: A line voltage thermostat is replaced by a low voltage clock-controlled thermostat without the need to install a switching relay in the basement of a house. Instead, a transformer-controller adapter unit is mounted within an electrical outlet box at which the thermostat is mounted. The adapter unit can be wired to the hot and the load wires at the outlet box without requiring any connection to a neutral wire.

Abstract: An adapter converts a conventional thermostat to effectively approximate a setback thermostat. A conventional thermostat includes a mercury switch which is actuated by a bi-metallic coil. The attachment is interposed between the thermostat and its standard base plate and operates to tilt the entire thermostat under control of the timing mechanism to thereby effectively change the setpoint of the thermostat.

Abstract: A thermostat control to change the setting of a thermostat to a preselected point and automatically to return the thermostat to the original setting after elapse of a preselected time interval.

Abstract: A cut-back thermostat construction having a frame carrying a timer and a thermostat arrangement. A movable actuator is carried by the frame and is operatively associated with the thermostat arrangement to cut back the temperature setting thereof when the actuator is moved from a first position thereof to a second position thereof, the timer having a cut-back member for engaging and moving the actuator from the first position thereof to the second position thereof when a predetermined time is reached by the timer whereby the temperature setting of the thermostat arrangement is cut back at the predetermined time.

Abstract: An add-on device for automatically adjusting the setting of a control mechanism, such as, a thermostat, which includes a separate, independent timer which is mounted adjacent the existing control mechanism and controls the same by means of a mechanically driven member which engages the manual adjuster of the control mechanism; the device further including a suitable coupler for coupling the driven member to the timer for moving the driven member at selected times to change the position of the adjuster.

Abstract: An improved temperature control apparatus includes a main control unit of the on-off type which is utilized to maintain a room at a relatively high temperature during the day and a secondary control unit which is utilized to maintain the room at a relatively low temperature during the night. When it is desired to change from the high day temperature to the low night temperature, an actuator button on the secondary control unit is manually depressed. Depressing the actuator button moves a relay contact to complete a holding circuit. This holding circuit includes a battery which supplies energy to maintain the relay actuated. When the air conditioning system has been operated to maintain the relatively low night temperature for the desired length of time, the battery will have been discharged to such an extent that it is no longer effective to hold the relay actuated.