Bizarre Patents
Behavior Modification Wristwatch
A wristwatch including a watch band and a watch body having an octagon shaped perimeter and being red in color and having the word STOP thereon to resemble a stop sign.
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| Number | Title | Issue Date |
| 4020394 | Ground fault detector A ground fault detector for protecting an electrical power system against ground leakage currents. The detector is of the differential transformer type, in which the primary windings of the transformer are connected in series with the hot and neutral line... | 04/26/1977 |
| 4015169 | Two pole ground fault circuit interrupter with improved rectified supply and transient suppression for a trip circuit The sensing and trip circuit electronics of a ground fault interrupter of the differential current transformer type is, in a two pole system, supplied with power from each of the line conductors through separate solenoid trip coils and zener diodes that t... | 03/29/1977 |
| 4012669 | Electronic overload detecting device A device for detecting a persisting electrical overload in an electrical system includes means for monitoring an electrical parameter in the electrical system and for generating an electrical signal whose magnitude represents the instantaneous absolute va... | 03/15/1977 |
| 4006387 | Low power solid state three-phase overcurrent/undercurrent protection circuit Each phase of the power input circuit in a three-phase electrical system is coupled to a sensor by means of a pick-off transformer. Each sensor has an overcurrent detection circuit comprising a slow response filter, an operational amplifier, and a compara... | 02/01/1977 |
| 4002950 | Power transmission control system The ac transmission system is protected by circuit breaker apparatus capable of responding to fault current levels exceeding a predetermined critical fault level, but less than the maximum fault current. The fault current levels exceeding the critical lev... | 01/11/1977 |
| 4000444 | Electric circuit breaker with ground fault protection Electric circuit breaker including highly sensitive ground fault responsive means for protecting human life from electrical shock. The circuit breaker is suitable for mounting in a panelboard at the service entrance of a building to provide ground fault p... | 12/28/1976 |
| 3992649 | Current differential fault detection circuit A current differential fault detection circuit. This circuit is used with a plurality of main current transformers respectively coupled to a plurality of separate conductors through which current flows into and out of a sectionalized portion of an a-c ele... | 11/16/1976 |
| 3984734 | Protective circuit arrangement for a high-voltage capacitor bank A protective circuit for a high-voltage capacitor bank in which the capacitor bank is subdivided into two equal parallel branches with a current measuring device connected in series with each branch and the outputs of the two current measuring devices con... | 10/05/1976 |
| 3982158 | Power distribution control system A system control arrangement for power distribution is disclosed in which a line current exceeding a predetermined threshold level is detected as a potential fault current and initiates comparison of the line current and a projected, simulated fault curre... | 09/21/1976 |
| 3978374 | Method and apparatus for the detection of short circuits A method for the detection of short circuits in electrical installations, in particular on railway contact wires, comprising generating a measuring signal dependent on the derivative with respect to time of the monitored current, comparing the measuring s... | 08/31/1976 |
| 3976918 | False triggering protection for ground fault sensor A ground fault detector-interrupter, including a differential transformer for detecting the difference between currents in the hot and neutral conductors connecting a load to an a.c. source, is provided with a resistor shunting the differential transforme... | 08/24/1976 |
| 3975663 | Method of an apparatus for detecting ground faults in electrical systems A method of detecting ground faults in ungrounded equipment having an electrical supply. The method comprises the steps of: Connecting either side of the supply to a chassis ground terminal of the equipment; Impressing a voltage varying alternately between two... | 08/17/1976 |
| 3974423 | Differential current protective device A differential current protective device comprising a responsive unit, current transformers feeding a polyphase bridge rectifier, a single-phase bridge rectifier connected to the secondary of a differential transformer, a circuit including two resistors c... | 08/10/1976 |
| 3973171 | Ground fault circuit interrupting device with grounded neutral detection The secondary winding of the differential current transformer in a ground fault circuit interrupter is normally short circuited through an electronic switch. A relaxation oscillator, including a timing capacitor, acts to periodically open the switch and d... | 08/03/1976 |
| 3973185 | Circuit for monitoring the inductance of an inductive load to indicate occurrence of a fault A circuit for monitoring the inductance of an inductive load controlled by phase-operated thyristor devices or similar devices. One embodiment of the invention comprises a first current sensitive device to produce a signal proportional to the current flow... | 08/03/1976 |
| 3970901 | Method and apparatus for the detection of short circuits A method for the detection of short circuits in electrical installations, in particular on railway contact wires, comprising: generating a signal corresponding to the derivative with respect to time of the monitored current, comparing the generated signal... | 07/20/1976 |
| 3968382 | Protective circuit for field effect transistor amplifier A field effect transistor amplifier comprising one or more depletion-type field effect transistors, preferably with triode characteristics, and having an operating voltage applied across its drain and source electrodes through a load, while an input signa... | 07/06/1976 |
| 3955121 | Short-circuit protective systems My invention relates to short-circuit protective systems for polyphase dynamo electric machine, which systems are very sensitive and respond to ground short-circuits as well as to phase-to-phase short circuits. The invention comprises two or three small c... | 05/04/1976 |
| 3953777 | Control circuit for shutting off the electrical power to a liquid well pump A control circuit for turning off the power to the pump drive motor when the pump has exhausted the supply of liquid in the well. Means for sensing the instantaneous current to the pump motor and a circuit measuring the average current drawn by the pump d... | 04/27/1976 |
