摘要:
The disclosure relates to laboratory equipment with flammable refrigerant and connected to at least two different electrical potentials for supplying the equipment with electrical energy. An electrical switch arrangement has first and second switches for electrical separation from, respectively, the first and second potentials. A sequence controller switches on the first switch and thereafter the second switch. A monitoring device is connected via a first contact on the equipment side to the first switch and via a second contact on the mains side to an electrical potential other than the first electrical potential for detecting a switched-on state of the first switch and signaling the detection to the sequence controller. When the monitoring device signals a switched-on state, the sequence controller blocks operation of the equipment as a function of the signaled switched-on state and whether the first switch is expected to be switched on or switched off.
摘要:
A control method, an electrical instrument, and a timer device control an electrical instrument such as an illuminating instrument. The control method is for an electrical instrument configured to to change an operation state thereof in accordance with a control sequence in which a power supply is momentarily turned off, and includes: connecting the electrical instrument to a commercial power supply, via a timer device capable of being set to momentarily turn off an output therefrom or turn on/off the output at a desired time, in accordance with the control sequence; and changing the operation state of the electrical instrument in accordance with a control sequence set in the timer device. The timer device is configured to be set to momentarily turn off an output therefrom or turn on/off the output at a desired time, in accordance with the control sequence.
摘要:
Techniques are provided for inhibiting changes in the operational state of electrical circuits for lights, appliances and other devices by controlling the effect of manual actuation of an electrical switch in an electrical circuit. A normal mode is established in which manual actuation of the switch effects a change in a state of current flow in the circuit. An alternative holiday mode is also established in which manual actuation of the switch has no effect on current flow in the circuit. Automatic switching occurs between the normal mode and the holiday mode at specific times corresponding to specific events dependent on the time of year, a time of day and a geographic location of the circuit.
摘要:
A solid state appliance controller includes circuitry formed on a circuit board, the circuitry defining a voltage trace in communication with a voltage source, a first state trace, and a second state trace. The first and second state traces are in communication with a processor. A user selection knob is operative to allow a user to select an operating mode of the appliance by rotating the user selection knob. A wiper assembly is coupled to the user selection knob for rotation therewith. The wiper assembly has a voltage finger operative to be in contact with the voltage trace so as to continuously receive a voltage therefrom during rotation of the selection knob. A first finger is operative to intermittently contact the first trace in accordance with a first pattern thereof wherein contact provides the voltage to the first trace during rotation of the selection knob. A second finger is operative to intermittently contact the second trace in accordance with a second pattern thereof wherein contact provides the voltage to the second trace during rotation of the selection knob. The processor is operative to receive voltages from the first and second traces in accordance with the intermittent contact of the first and second fingers with the intermittent voltages from the first and second traces respectively defining a plurality of state changes.
摘要:
An appliance controller includes a control knob assembly and detection mechanism having various mechanical and electrical components that are configured to detect the position of the knob assembly and produce a position signal indicative of the knob assembly position. The position signal is provided to the appliance controller that produces a control signal in response thereto. The control signal is used to initiate various appliance functions based on the specific position of the knob assembly. In one form, the detection mechanism includes a variable resistor assembly that is comprised of a wiper and resistor pad arrangement. In another form, the detection mechanism includes a shaft encoder mechanism that is comprised of a light transmitter and receiver, and an associated apertured disc secured to the knob assembly.
摘要:
An appliance control system includes a housing and a user cycle selector which is movable in relation to the housing between a first selector position and a second selector position. The appliance control system further includes a first spring secured to the housing, the first spring being configured to retain the user cycle selector at (i) the first selector position during a first period of time, and (ii) the second selector position during a second period of time. Additionally, the appliance control system includes a mode switch positioned within the housing, the mode switch having an actuated state and a deactuated state: The appliance control system also includes a second spring having a spring arm which is movable between a first arm position and a second arm position. Movement of the user cycle selector from the first selector position to the second selector position causes the spring arm to move from the first arm position to the second arm position. And movement of the spring arm from the first arm position to the second arm position causes the mode switch to be switched from the deactuated state to the actuated state.
摘要:
A transformerless power controller provides low standby power (milliwatts) for standby circuitry/logic of an appliance when the appliance is not in use. The power controller also provides gradations of power for the appliance based on need of the appliance and/or appliance component(s). In one form, a signal from a processor of the appliance provides control of the power controller. Particularly, a control signal from the processor operates a switch for the gradations of available power. The control signal may further provide timing for application of the power to the appliance and/or appliance component(s).
摘要:
Programmer for electric household appliances, comprising an assembly of programming cams driven in rotation by a reversing cam driven itself by a motor, a timing wheel driven in rotation by the reversing cam via a set of levers, a first cam of the cam assembly triggering off the rotating of the timing wheel and the simultaneous stopping of the cam assembly, a cam surface on the timing wheel triggering off again the rotating of the cam assembly and the stopping of the timing wheel after a timing the period of time of which is determined by a second cam of the cam assembly.