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| Number | Title | Issue Date |
| 5977662 | Electronic switching device and circuits with a plurality of such switching devices An electronic proximity switching device with a proximity indicator and with an electronic switch which can be controlled by the proximity indicator. A plurality of these switching devices can be series connected without an unacceptable voltage drop occur... | 11/02/1999 |
| 5977661 | Switches and circuits for solenoid control Switching systems are provided for fail-secure and fail-safe solenoid operated locks, and are designed to maintain the solenoid cool during activation during normal operation when the solenoid is continuously supplied with current. The switching system co... | 11/02/1999 |
| 5977882 | Infrared remote controlled in-line power switch A switch (10) utilizes an infrared detector (22) that can be operated by existing wireless television or stereo remote control transmitters. Output from a triac (14) of a switch (10) to a load (11) can be varied remotely. In addition, a variety of load (1... | 11/02/1999 |
| 5973608 | Remotely activated electrical control arrangement An arrangement for controlling the activation of an electrical appliance. The arrangement utilizes a capacitive sensor to recognize the physical proximity of a user (e.g., a hand) to an internal capacitive sensing means. The capacitive change is applied a... | 10/26/1999 |
| 5973417 | Circuit arrangement for a sensor element A circuit arrangement (11) has an activating circuit (13) for a sensor element (12) of a touch contact switch, which in one embodiment of the invention contains a frequency generator (16). The frequency generator (16) generates a frequency-modulated activ... | 10/26/1999 |
| 5973623 | Solid state capacitive switch A fingertip-operated solid state capacitance switch detects a capacity change that is induced by the physical contact of an ungrounded fingertip to an external dielectric surface of the solid state switch. The input and output of a solid state signal-inve... | 10/26/1999 |
| 5973414 | Program controlled switching device insertable into a power supply outlet A switching device of the type that can be placed between electric outlet and a load and is provided with a switch and electronic circuits including a programmable control device in order to close and break the circuit according to predetermined condition... | 10/26/1999 |
| 5973418 | Pull-out high current switch A high-current fusible switch includes a nonconductive base, a nonconductive removable top, a plurality of conductive fuse clips, and a fuse having blade-type terminals. The fuse clips are fixedly mounted within the base. The fuse is retained within the t... | 10/26/1999 |
| 5965957 | Switching apparatus, in particular for systems under test Switching apparatus for automatically interconnecting a first unit with a second unit, the apparatus having a first input/output assembly connected to the first unit and a second input/output assembly connected to the second unit, and including both at le... | 10/12/1999 |
| 5962933 | Computer fan speed control method A method of cooling computer components is provided. The method comprises positioning the fan adjacent computer components so that the fan is in a position to blow air over the computer components, connecting the fan to a first voltage source through a ze... | 10/05/1999 |
| 5962931 | Electric brake system and method for operating the same The invention relates to an electric brake system for a motor vehicle and a method for operating the same. In conventional electric brake systems, the energy consumers (6, 8a, 10a, 14b, 16b, 30a, 30b) are connected to the voltage source (24a, 24b) when a ... | 10/05/1999 |
| 5955791 | Master/slave circuit for dust collector A mechanism for switching from independent to synchronous, or vice versa an operational circuit for supplying power to an electric dust collector (Slave) when an electric power tool (Master) is operated. In independent mode, power is supplied to both the ... | 09/21/1999 |
| 5952738 | Switching circuit for an inductive load In a circuit, switch (1) switches a current from a reference voltage terminal through an inductive element (3). The energy stored in the magnetic field associated with the inductive element when a current is flowing is transferred on interruption of the c... | 09/14/1999 |
| 5949157 | Motor driven switch An improved motor driven switch is provided. A control system employs the improved motor-driven switch in series with a battery to disconnect the battery from a load when the energy level of the battery drops to a predetermined level. The system comprises... | 09/07/1999 |
| 5946274 | Switch device and electronic device which includes such switch device When an inclination switch SW3 is turned on by inclining a wristwatch 12 up at 12 o'clock within a predetermined time after an acceleration switch SW2 is turned on in a state where an auto mode on/off subswitch SW1-1 is on, a lighting circuit lights up an... | 08/31/1999 |
| 5942809 | Method and apparatus for generating internal supply voltage An apparatus and method for generating an internal supply voltage for a semiconductor integrated circuit, includes a first voltage generator which generates a voltage in response to a predetermined characteristic of the semiconductor integrated circuit, a... | 08/24/1999 |
| 5942812 | Proximity detector with a stable current source A proximity detector having a power switch 30 which is switched as a function of the approach of an object. The detector includes a MOS depletion transistor T1 which connects one of the terminals 15 of the detector to a control input of a power switch 30 ... | 08/24/1999 |
| 5939998 | System and method for reducing quiescent current in a microcontroller A system having reduced quiescent current drawn from a power supply. The system includes a device having a status. Moreover, the system includes a microcontroller, having an active and a sleep mode of operation, for polling the status of the device during... | 08/17/1999 |
| 5936362 | Programmable remote control systems for electrical apparatuses A control system for remotely controlling the application of electric power to a plurality of electric apparatuses includes a radio transmitting device at a central location, and a radio receiving device and a control unit at each electrical apparatus loc... | 08/10/1999 |
| 5933085 | Environmental control lock system The electric lock system combines an electric lock with an energy control unit such that when a guest key is used in the lock, the lock communicates with the energy control unit to move from an unsold state to a sold state. Optionally, the guest key has i... | 08/03/1999 |
| 5923101 | Non-contact key A non-contact switch movs from an off position to an on position when a lossy material enters a sensitive area of the switch. The non-contact switch comprises a transmitting element and a sensing element. The transmitting element is capable of radiating a... | 07/13/1999 |
| 5920131 | Arrangement for the control of electrically controllable appliances An arrangement for the control of electrically controllable appliances, particularly electric cookers proposes for each cooking point an operating element magnetically held in contactless manner on the top or front of a plate, e.g. a glass ceramic plate. ... | 07/06/1999 |
| 5917428 | Integrated motor and diagnostic apparatus and method of operating same A method and apparatus for real-time electric motor diagnostics and condition monitoring. While the motor is energized, dynamic operating parameters are determined and a notification signed is generated if predetermined criterion are satisfied. The diagno... | 06/29/1999 |
| 5914541 | Method of generating a switching signal on reaching a particular condition, and circuit for carrying out the method A switching method for producing a switching signal on reaching a switching condition, an evaluation circuit being supplied successively in time with a sequence of measurements which each comprise at least two bits, the measurements being checked for the ... | 06/22/1999 |
| 5914674 | Detector and alarm apparatus and system An alarm apparatus includes two sensor circuits. One of the circuits is configured to emit an audible warning upon the sensing of an adverse condition. The other circuit functions to scan for a radio signal and, when one is detected, transmit a further ra... | 06/22/1999 |
| 5898290 | Battery pack with capacity and pre-removal indicators A battery capacity monitoring system readily indicates the remaining capacity of an uninserted battery pack upon an operator's request. Such request may involve the touching of one or more contacts disposed on the battery pack. The battery pack also inclu... | 04/27/1999 |
| 5895985 | Switch remoting system A switch remoting system for extending the function of an existing wired switch in a residence or other building, so that, in its extended function, the switch controls AC power available at one or more additional AC outlets. The basic system comprises tw... | 04/20/1999 |
| 5886427 | Low signal loss type hot stand-by switching unit A hot stand-by switching unit for a receiving apparatus including regular and a protection receiver comprises a branch circuit and a control circuit. The branch circuit consists of a coupler and a high-frequency switching unit. The high-frequency switchin... | 03/23/1999 |
| 5870317 | Remote and proximal interlock testing mechanisms and testing systems This invention relates to a novel process with attendant methods and apparatus for testing interlocks on machine barrier guards or equivalent safeguards. The process simulates the breaching of the interlocked safeguard to test the interlock without shutti... | 02/09/1999 |
| 5856905 | Two wire air gap off power supply A power supply circuit is provided for selectively connecting and disconnecting a load from an alternating current power source having neutral and line conductors which comprises a transformer having a primary winding connected to the load and a secondary... | 01/05/1999 |
| 5841204 | Temperature control system and method A temperature control system and method for regulating the temperature of an external device or load is provided which maintains the actual ambient temperature of the external device at a desired set point temperature. The temperature control system inclu... | 11/24/1998 |
| 5835331 | Half-wave drive circuit for meter disconnect switch A very low cost method of driving the coil of a meter disconnect switch utilizes the 60 Hz signals from an existing power supply rectifier to generate properly phased gate drive signals to SCRS, with only one stage of isolation.... | 11/10/1998 |
| 5835989 | Battery system which prevents current from flowing during a short-circuiting of the battery terminals A rechargeable battery package includes circuitry with a switching device which disconnects the exterior terminals of the battery package from one or more batteries therein. The circuit also includes a device having a diode function which allows the batte... | 11/10/1998 |
| 5834861 | LSI for signal transmission A large scale integrated circuit has a first circuit section with input terminals external of the integrated circuit connected to output terminals of a second portion of the integrated circuit for use in an environment not requiring intrinsic safety. When... | 11/10/1998 |
| 5825102 | Fail-safe circuit A fail-safe circuit (10) comprises a storage battery (11) for electrical charges as well as a first charge path (12) which optionally connects the storage battery (11) to a first potential (UL). A second charge path (14) and a third charge path (15) optio... | 10/20/1998 |
| 5818129 | Non-contact proximity switch and method for programming it In order to improve a non-contact proximity switch, and a method for programming it, with an resonant circuit that can be influenced by objects approaching from outside and an evaluation circuit to generate an output signal as a function of an output volt... | 10/06/1998 |
| 5818128 | Wireless multiple position switching system A wireless multiple position switching system is disclosed for controlling the application of power to a load device from a plurality of remote locations. The switching system includes a power source, a load device, a master toggle switch and one or more ... | 10/06/1998 |
| 5814902 | System and process for control of energy use by direct observation of occupancy A system and process for control of energy use in a rented room based on direct occupancy observation. The system is designed to control up to 100% of the power usage. The system includes: a power supply; occupancy sensors; a thermostat responsive to a pr... | 09/29/1998 |
| 5811896 | Switching device A switching device (10) for an electrical load, particularly for an electrical toy compraising a normally open reed switch (14) and a fixed biasing magnet (15) located at a distance from the glass tube (17) of the reed switch such that the magnetic streng... | 09/22/1998 |
| 5812057 | Device for finding concealed studs A detector device for finding concealed studs in partitioning includes a pair of plates which are supplied with ac via resistors. Amplifiers produce outputs representing the sum and difference respectively of the signals imposed on the plates. The sum sig... | 09/22/1998 |
