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| Number | Title | Issue Date |
| 5623611 | Data processing apparatus having a bidirectional interface with receiving buffers, three-state buffers, and enable terminals for automatically switching the direction of data transmission and reception A data processing apparatus having a bidirectional interface which usually remains in a receiving mode during operation ready to receive data signals from an external device over a receiving data bus. When the apparatus is to transmit a data signal to the... | 04/22/1997 |
| 5621257 | Gate drive circuit for voltage-driven type power switching device A gate drive circuit for a voltage-driven type power switching device, including a control device for generating a gate voltage for the voltage-driven type power switching device, and a correction device connected to the control device for receiving the g... | 04/15/1997 |
| 5621254 | Uninterruptible power switching method and apparatus A change-over switch performs switching between two different power supplies after connecting both power supplies simultaneously for a given time period. A controller controls the change-over switch to perform the switching operation around a synchronous ... | 04/15/1997 |
| 5619076 | Method and apparatus for connection and disconnection of batteries to uninterruptible power systems and the like Connection of batteries to the DC bus lines across which capacitors are connected in power systems, such as uninterruptible power systems, is carried out using an auxiliary switch which is controlled to connect the batteries to a DC bus line through a pre... | 04/08/1997 |
| 5616970 | Method and circuit arrangement for driving semiconductor switches in a series circuit In a method and a circuit arrangement for driving semiconductor switches in a series circuit, in which a voltage limiting device is assigned to each semiconductor switch, the power losses of the voltage limiting devices are detected by a control equipment... | 04/01/1997 |
| 5610453 | Pulsewidth modulation (PWM) frequency slider A frequency slider circuit for reducing power dissipation in the form of switching losses in a switching device when the switching device is near its desired maximum temperature limit is disclosed herein. The switching device controls an electric load, su... | 03/11/1997 |
| 5608386 | Adjustable hall effect switch gauge A lighted switch set gauge includes Hall effect devices using a circuit activating switch attached to a lower extension of indicating and switch set pointers. The switch set pointer is externally adjustable. An overriding slip gear with automatic spring-b... | 03/04/1997 |
| 5602428 | Switch mat with active threshold A pressure sensitive switch mat capable of interconnection with other such switch mats on all sides to eliminate non-activation zones as disclosed. The switch mat has a main switch mat portion and an activation edge on all sides of the switch mat. The act... | 02/11/1997 |
| 5598042 | Moveable desktop load controller A device for controlling power to an electrical load. The device has two components: a portable desktop detector unit and an electrical powerstrip. The desktop detector detects the presence of a human in a room and sends signals to the powerstrip to suppl... | 01/28/1997 |
| 5592032 | Security power interrupt A security electrical interrupt device for preventing unauthorized usage of an electrical appliance such as an electric stove, while retaining operation of auxiliary electrical equipment such as the lights and an electrical clock. The device comprises a r... | 01/07/1997 |
| 5578753 | Humidity and/or temperature control device A humidity control device includes a microcontroller, a variable impedance humidity sensing circuit and a zero crossing detector circuit. The humidity sensing circuit and zero crossing circuit are provided with an AC line voltage and both have outputs whi... | 11/26/1996 |
| 5568349 | Apparatus and method for controlling a relay device A relay device (103) having a coil (144) and a set of contacts (146, 147) employs an apparatus (100) and method (200) for drawing current through the coil (144) to close, and maintain closure of, the set of contacts (146, 147). A first terminal of the coi... | 10/22/1996 |
| 5568046 | Inactive state termination tester An inactive state termination tester for determining the number of terminators connected to a bus when the bus is inactive. The termination tester monitors the bus for determining when it is inactive. During the periods of bus inactivity, the termination ... | 10/22/1996 |
| 5565714 | Power conservation circuit A power conservation circuit having a low voltage power supply for powering a first and second switch. The first switch connects output terminals to either the low voltage power supply or a powered device. The second switch connects or disconnects power t... | 10/15/1996 |
| 5552645 | Automatic probe activation Ultrasound imaging system providing automatic activation of a probe, which ultrasound system includes: (a) a motion sensor for detecting motion of the probe and for generating a signal in response to the motion; (b) a signal detector for detecting the sig... | 09/03/1996 |
| 5552644 | Proximity switches There is disclosed a two wire AC power supply for proximity switch integrated circuits. A problem has existed with previous power supplies in that such have been implemented using discrete devices, which take up valuable room on any printed wiring assembl... | 09/03/1996 |
| 5552646 | Compact control and monitoring switch A device for control and monitoring of pressure in a system combines a conventional three pole pressure switch with the following additional features: (1) a lock mechanism with three influencing input factors and a single resulting output contact action, ... | 09/03/1996 |
| 5545934 | Voltage clamp circuit A clamping circuit for clamping a circuit node during an initial circuit powerup interval includes a switching circuit and a switching control circuit. The switching circuit is an N-MOSFET with its drain and source terminals connected to circuit ground an... | 08/13/1996 |
| 5536980 | High voltage, high current switching apparatus A high voltage, high current DC switch is shown having a single pole, double throw relay and a solid state power switch such as an IGBT or MOSFET transistor. Voltage is switched by means of the solid state switch while steady state current is conducted th... | 07/16/1996 |
| 5536981 | Circuit card mounting shelf apparatus having automatic identification number setting function A circuit card mounting shelf apparatus having an automatic identification number setting function by which the identification number of a circuit card can be set automatically without the necessity of an artificial operation while maintaining the univers... | 07/16/1996 |
| 5532557 | Electric light socket constructions Light socket improvements include a thermal conductor which removes heat by inducing a flow of air within the socket and/or which acts as heat sink that more efficiently transfers heat to the socket support thereby enabling use of higher wattage light bul... | 07/02/1996 |
| 5530298 | Solid-state pulse generator A solid-state pulse generator for use in determining the output of a gas volume meter. A sensor detects a change in a magnetic field with rotation of a gas meter element and generates an electrical output pulse. A MOSFET switch having output terminals is ... | 06/25/1996 |
| 5530299 | Method of determining mechanical parameters of an electric switching device A method for determining mechanical parameters of an electric switching device exposed to environmental influences in which a measuring transmitter is provided for detecting the speed of a component of the drive means of the switch device at at least two ... | 06/25/1996 |
| 5528449 | Arrangement for separating a control device from an AC mains supply The invention relates to an arrangement for isolating control devices from the mains in cases where the internal operating voltage is supplied by means of a mains-bound voltage source. Control devices of this kind, which are used in many fields of engineering,... | 06/18/1996 |
| 5522081 | Drive current detection and optimization circuit for computer systems In a computer system having a computer bus drive circuit capable of providing drive current to an individual line of a computer bus coupled thereto, a circuit for determining a proper level for the drive current and a method of making such determination. ... | 05/28/1996 |
| 5517112 | Magnetic field detector with noise blanking There is added to a conventional magnetic-field detector, which includes a magnetic-field-to-voltage transducer such as a Hall element connected to a Schmitt trigger circuit, a DC voltage monitor circuit to produce a high binary monitor signal only when t... | 05/14/1996 |
| 5514223 | Dual discharge photovoltaic module A dual discharge photovoltaic module responsive to high and low loads. The module includes a first plurality of series connected, high short circuit current cells, and a second plurality of series connected, low short circuit current cells connected in se... | 05/07/1996 |
| 5510950 | Method and circuit for controlling and monitoring a load A method and circuit is provided which controls and monitors a load through a single I/O pin of a microprocessor. A predriver circuit including a level shifter responds to a driver control signal from the microprocessor to control energization of a power ... | 04/23/1996 |
| 5506574 | Multi-functional intrusion warning system for branch circuits of a home and the like A multi-functional intrusion warning system is used directly in the conventional circuitry of a building such as a home, small business or the like, having a conventional AC power source, a plurality of branch circuits and a circuit breaking means (locate... | 04/09/1996 |
| 5498914 | Capacitive sensor circuit A capacitive sensor circuit is provided which comprises: a sensor electrode (16) forming a first plate of a sensing capacitor (14) relative to a reference terminal (10), a first (2) and a second (26) inverting Schmitt trigger having the same threshold vol... | 03/12/1996 |
| 5489808 | Electric circuit substrate apparatus An electric circuit substrate apparatus having a micro-processor for a control of a device is comprised of a substrate, an electric circuit arranged on the substrate and including a rectifier, an electrolysis condenser, a detecting device for detecting th... | 02/06/1996 |
| 5489806 | Airbag horn switch with temperature compensation A pressure activated switch is positioned for actuation of a horn in the steering wheel of a motor vehicle. The switch is mounted on an airbag cover and generates a signal when the switch is activated by the deflection of the cover. A temperature sensing ... | 02/06/1996 |
| 5488247 | MOS-type semiconductor clamping circuit A MOS-type semiconductor clamping circuit includes a semiconductor substrate receiving a substrate potential, a well isolated electrically from the substrate potential, and MOS-type transistors formed in the well. Those transistors are connected with each... | 01/30/1996 |
| 5486725 | Security power interrupt A security electrical interrupt device for preventing unauthorized usage of an electrical appliance such as an electric stove, while retaining operation of auxiliary electrical equipment such as the lights and an electrical clock. The device comprises a r... | 01/23/1996 |
| 5473202 | Control unit for occupancy sensor switching of high efficiency lighting A control unit for switching AC powered high efficiency lighting in response to a signal from an occupancy sensor. The lighting is switched by a hybrid mechanical relay/semiconductor switch. The semiconductor switch is connected in parallel with the relay... | 12/05/1995 |
| 5463354 | Proximity switches including long tail pair with emitter follower feedback A proximity switch circuit including first and second transistors Q4, Q6 connected as a long tail pair with an inductive sensing circuit LC connected to one leg thereof and an emitter follower circuit Q7, Q8 connected between said one leg and the base of ... | 10/31/1995 |
| 5453644 | Personal-care apparatus comprising a capacitive on/off switch A personal-care apparatus comprises a load (LD) and a switch (SW), which load (LD) and which switch (SW) are coupled in series between a first (1) and a second (2) supply terminal for receiving an alternating voltage, the personal-care apparatus further c... | 09/26/1995 |
| 5442283 | Hall-voltage slope-activated sensor The Hall sensor circuit includes a Hall element that is preferably followed by a Hall-voltage amplifier, and a pole end of a magnet is preferably fixed adjacent to the Hall element. The amplifier output is connected directly to one of a pair of differenti... | 08/15/1995 |
| 5428253 | Proximity switch A high frequency oscillation type proximity switch prevents mutual interference when it is mounted adjacent to other proximity switches. The switch includes a comparator having a threshold value at a level higher than an object detection level of the osci... | 06/27/1995 |
| 5422520 | Switching control device A device for automatically controlling the switchover of a regular and a standby control board. A connection detecting circuit is built in each of the regular and standby control boards for determining whether or not the other control board is connected. ... | 06/06/1995 |
