摘要:
An auxiliary lighting control circuit and method for a lighting system having a HID lamp as the primary light source and an auxiliary light source for providing light when the HID lamp is extinguished or below full brightness but power remains available to the circuit. The circuit senses the HID lamp current and activates a relay to a conductive state using a solid state controller when the HID lamp current is below a predetermined current magnitude to effect the lighting of the auxiliary light source.
摘要:
Retrofit apparatus (38) for attachment to a utility meter (10) to detect revolutions of a dial arm (34) of the utility meter. A piezoelectric crystal (42) is provided against which a striker arm (52) abuts. The striker arm is rotatable on an axle (50) and is therefore movable relative to the piezoelectric crystal. A spring (54) is tensioned so as to resiliently bias the striker arm against the crystal. A shoe (62) is also mounted on the axle and is disposed in the path of rotation of the dial arm so that once each revolution the dial arm engages, deflects, and releases the shoe, thereby causing the striker arm to withdraw from and then snap back against the piezoelectric crystal. The crystal produces an electrical pulse in response. The pulses are counted by a counter (82) to provide a count indicative of utility usage.
摘要:
A system and method for actuating a device from a remote location includes a signal generator for establishing a signal indicative of a desire to actuate the device, detector means for sensing the signal indicative of a desire to actuate the device and for actuating a switch means for actuating the device. A feedback signal is provided indicative of actuation of the device.
摘要:
Trip devices are disclosed for attachment to existing utility meters to detect revolutions of a dial arm of the meter. Two embodiments are disclosed, each including a spring-biased shaft extending through a base and a shoe on the end of the shaft. As the dial arm rotates, it catches and deflects the shoe, thus rotating the shaft. The shoe then slips off of the dial arm and returns to its original position under the urging of the spring. In one embodiment, shaft rotation is detected using a magnet and reed switch arrangement. In the other a mercury switch is instead used.
摘要:
An electrical device for treating problem skin areas, including warts, has an electrode and a power source coupled to the electrode for generating an arc over a gap between a distal end of the electrode and a patient's skin when the electrode is placed in spaced proximity to the patient's skin. The power source provides electricity to the electrode with a frequency of at least 100 kHz, an open-circuit voltage of less than 2 kVRMS, and a total power of less than 2 W.
摘要:
A method for communicating utility usage-related information from a plurality of meter modules to a plurality of data accumulator units, each of which periodically transmits data to a control computer, including the steps of periodically transmitting from each meter module a first signal indicative of utility usage-related information and wherein the first signal includes a flag for self-configuring the communications network when the meter module is initially installed. The signal strength of the first signals from a meter module received at a data accumulator unit are measured and ranked by the control computer based on received signal strength. The ranking based on signal strength is utilized to enable only a limited number of data accumulators (those which received the strongest first signals) to receive, record and store data from a particular meter module.
摘要:
A medical pumping system has a supply tube (2), an outlet tube (6), a readily sterilizable, disposable cassette (3) connected to the tubes and engaged with the pump, and means (22,24) such as a motor-driven piston, for intermittently applying pressure to the cassette. The pumping system features a display and switch means (9, 10) on a front panel thereof, a pressure sensor (28), an optical fluid presence sensor (19), and a microprocessor (20) metering the volume of fluid pumped through said cassette (3), monitoring output signals from said sensors (18, 28), controlling the motor-driven piston in accordance with settings entered via said switch means (9,10), and directing output data to said display means (8). The microprocessor has a stored program for performing SET RATE, RUN, HOLD, VOLUME FED, and CLEAR VOLUME functions. The cassette includes a hydraulically self-actuating inlet valve (44) communicating with the supply tube (2), a hydraulically self-actuating outlet check valve (42) communicating with, and preventing backflow from, the outlet tube (6), a hollow, resilient compressible member, such as a bellows (34) having an interior communicating with the inlet and outlet valves, and a support structure (30,36,38) securing together the tubes, valves and bellows in operating relation. Preferably, the inlet and outlet valves are a unitary element.
摘要:
A meter transmission unit for transmitting a signal indicative of utility usage at a utility meter which is adapted for use with a pit set utility meter located in a pit having a cover and an opening therein for supporting the meter transmission unit and a method of installing the meter transmission unit. The meter transmission unit includes a tubular housing having a detachable flange at one end thereof for supporting the meter transmission unit on the pit cover and includes an annular collar having vertical adjustment means extending through the annular collar for engaging with the bottom of the pit cover to pull the flange tightly toward the top surface of the pit cover.
摘要:
An apparatus for communicating utility usage information at a utility usage location to a utility usage registering device includes a utility usage registering module adapted to be located at a utility usage location to provide a first signal indicative of the utility usage information, a transmitter responsive to said first signal for periodically transmitting at a pseudo-random transmission intervals, a second signal indicative of utility usage, a receiver located remote from the utility usage location for receiving the second signal, and a utility usage registering device associated with the receiver for storing the second signal indicative of utility usage information. A tamper detector is provided to detect the occurrence of a tamper event and generates a tamper signal which is directed to the utility usage registering module. The tamper signal is indexed upon the tamper detector sensing the occurrence of each tamper event.
摘要:
A method and apparatus for actuating a direct source exhaust gas capture system for capturing and exhausting exhaust from a vehicle tailpipe which automatically starts when the ignition system of the vehicle is actuated prior to the engine starting, and which is operable to automatically restart when the vehicle returns to the vehicle storage facility.