Bizarre Patents
A haircutting appliance comprises an enclosed housing having a hollow handle connecting the housing to a vacuum source to carry away cut hairs from a subject's head.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6929465 | Timer circuit for valve activation in oil burner system The present invention is directed to an oil burner system having an electric cord set coupled between a controller and a valve associated with a pump. The electric cord set is operable to activate a solenoid valve associated with the pump for delivery of fuel oil to... | 08/16/2005 |
| 6925024 | Zero power chip standby mode A zero power standby mode in a memory device used in a system, such as a battery powered hand held device. By disconnecting the internal power supply bus on the memory device from the external power supply during standby mode, the junction leakage and gate induced d... | 08/02/2005 |
| 6728087 | Method and apparatus for remotely actuating a circuit protection device A method and apparatus for remotely operating a circuit protection device, such as a circuit breaker, to move the circuit protection device to an open condition to disconnect a load from a power source. The apparatus includes a control circuit positioned externally ... | 04/27/2004 |
| 6256185 | Low voltage direct control universal pulse width modulation module An electrical control module and circuit for controlling a solenoid. The control circuit provides a constant voltage to a solenoid for a predetermined time period after which a pulse width modulated voltage is supplied. The circuit further includes compon... | 07/03/2001 |
| 6078491 | Hybrid relay A hybrid relay with an electromagnetic relay system having at least one coil one core yoke unit, at least one armature which switches contacts and one power semiconductor whose switching path, in combination with the contacts switches the load circuit of ... | 06/20/2000 |
| 5895958 | Input protection circuit for use in semiconductor device having an improved electrostatic breakdown voltage In an input protection circuit, a bipolar protection device is constituted of a semiconductor substrate of a first conductivity type, a first diffused layer of a second conductivity type formed in the substrate and connected to an input signal pad, a seco... | 04/20/1999 |
| 5719738 | Circuit breaker remote closing operator A remote closing operator is positioned within a circuit breaker enclosure to allow remote operation of the circuit breaker operating mechanism to close the circuit breaker contacts. A closing solenoid and associated logic circuit controls the state of th... | 02/17/1998 |
| 5633776 | Circuit breaker An electronically controlled latching circuit breaker capable of being remotely set or tripped. The electronic controls are current sensitive rather than thermally activated.... | 05/27/1997 |
| 5502609 | Electric circuitry for preventing contactor tip contamination in dry switching applications A contactor control system for a DC electric power system for reducing contactor tip contamination from dry-switching includes a first switch connected in circuit between a power source and a controller for enabling the controller upon closure of the firs... | 03/26/1996 |
| 5467248 | Relay control circuit A relay control circuit in which a capacitor is used as a power source of a transistor which prohibits operation of the transistor which is operated by input by switch operation. If power is no longer supplied to the entire relay control circuit while the... | 11/14/1995 |
| 5416665 | Vehicle electromagnetic clutch control device In a vehicle electromagnetic clutch control device, clutch current calculating means outputs a clutch current analog signal according to given travel control data and engine control data, a current difference detector obtains the difference between the cl... | 05/16/1995 |
| 5283572 | Utility meter interface circuit An interface to facilitate storing in an electric utility meter transponder, water usage data so that when remotely interrogated, access can be had to both electric and water usage data. A pulse indicative of water usage sets a magnetic latching relay in ... | 02/01/1994 |
| 5235490 | Trigger circuit for an electromagnetic device A trigger circuit for an electromagnetic device, in particular a solenoid valve of an injection system for an internal-combustion engine, has a control element for causing excitation of the electromagnetic device to be lowered at least once and then raise... | 08/10/1993 |
| 5170313 | Timed contact switch A timed contact switch apparatus has a conventional pushbutton placing a main switch in an actuated state when the pushbutton is depressed. A timing circuit is activated by the pushbutton to provide power to activate an electromechanical latch which holds... | 12/08/1992 |
| 5105329 | Apparatus for driving the armature of an electric stapler Solid state control circuitry for driving an electromagnetic armature of a battery operated electric stapler. The armature is activated by a trigger signal generated by a trigger switch which discharges an energy storage device through the armature. Energ... | 04/14/1992 |
| 4873606 | Safety control device for an actuator of the flap solenoid valve type A safety control device for an actuator of a flap solenoid valve, such as for an automatic transmission. The device includes a current control device which is connected to a shunt resistor for measuring the current through the solenoid valve and the curre... | 10/10/1989 |
| 4860158 | Low pressure metering fluid pump A low pressure metering pump having a hollow piston reciprocated in a cylindrical guide by a solenoid coil. A pair of check valves provide for unidirectional fluid flow through the cylindrical guide in response to the reciprocation of the piston. A seal a... | 08/22/1989 |
| 4832583 | Low pressure metering fluid pump A low pressure metering pump having a hollow piston reciprocated in a cylindrical guide by a solenoid coil. A pair of check valves provide for unidirectional fluid flow through the cylindrical guide in response to the reciprocation of the piston. A seal a... | 05/23/1989 |
| 4798971 | Apparatus for controlling device start up and off/on running periods A forced air gas heating furnace system includes a thermostat having a transformer for converting the typical household 115Vac to a 24V thermostat ac control voltage, and a switch, the thermostat elements connected to the junction of an ac to dc converter... | 01/17/1989 |
| 4770417 | Method and apparatus for controlling a bowling ball lift mechanism Method and apparatus for controlling and operating the return ball lift mechanism in a bowling alley. In a preferred embodiment the motor which drives the lifting belt is normally inoperative and it is actuated when a ball arrives to be lifted into the st... | 09/13/1988 |
| 4745629 | Duty cycle timer An improved duty cycle timer provides a duty cycle control signal having alternate "on" and "off" intervals of different logic states. The timer utilizes integrated circuitry having first and second independent clock sources respectively driving first and... | 05/17/1988 |
| 4714977 | Electronic delay timer A machine tool timing relay has immunity from electrical noise on a control signal, and has an oscillator capable of generating pulses having a predetermined frequency, a means for adjusting the predetermined frequency over a continuous range of frequenci... | 12/22/1987 |
| 4683904 | Moisture sensor A moisture sensor having an oscillator circuit with its output frequency directly proportional to moisture percentage present in the substance of interest, such as soil. The oscillator circuit includes two spaced plates in the substance which function as ... | 08/04/1987 |
| 4657039 | Moisture sensor A moisture sensor having an oscillator circuit with its output frequency directly proportional to moisture percentage present in the substance of interest. The oscillator circuit includes two spaced plates in the substance and functioning as a capacitor. ... | 04/14/1987 |
| 4649458 | Control circuits for electromagnetic coupling apparatus The control circuit for use with an electromagnetic coupling apparatus comprises a timer started when a power source switch is closed, an oscillator started by the switch and stopped by the timer, and a drive circuit which intermittently passes current th... | 03/10/1987 |
| 4636912 | Circuit for controlling solenoid clutch A circuit for controlling a solenoid clutch wherein a gap is present between an electromagnet and an associated attracted member when in the disengaged state. The circuit controls the level of exciting current supplied to an exciting coil of the solenoid ... | 01/13/1987 |
| 4563721 | Circuit arrangement for actuating electromagnetic switchgear The invention relates to a circuit arrangement for actuating exciting coils for electromagnetic switchgear. A transistor is connected in series with the exciting coil, as an electronic switch. Parallel with the series connection are a capacitor and a cloc... | 01/07/1986 |
| 4560892 | One-shot delay timer A one-shot delay timer 4 is provided by a pair of comparator timers 14 and 18. The first comparator timer 14 responds to an input signal and provides a delayed output initiating the output pulse. The second comparator timer 18 provides a delayed output te... | 12/24/1985 |
| 4560891 | ON/OFF delay circuit A delay circuit 2 utilizes two comparator timers 4 and 6 and a minimum of logic to achieve a combination ON/OFF delayed function. The comparator timers 4 and 6 are resettable independently of each other such that each respective ON or OFF delay function m... | 12/24/1985 |
| 4555743 | Timer circuit A timer circuit suitable for operating, for a required period of time, the windshield defrosting heater in an automobile, comprises a switch operative only in one direction, such as a momentary unidirection switch, a timer which starts timing operation af... | 11/26/1985 |
| 4546266 | Magnetically actuated interlock An electrical circuit, the starting circuit for a motor vehicle for example, is selectively enabled by a control circuit which includes a magnetic field responsive switching device. Proper positioning of a magnet which provides a field of the appropriate ... | 10/08/1985 |
| 4538074 | Power switch An improved power switch circuit for turning on manually and for turning off either manually or automatically a battery operated electronic instrument. The circuit includes one manual momentary contact on/off switch, a bilateral switch or transmission gat... | 08/27/1985 |
| 4533810 | Start circuit for microwave oven A start circuit arrangement for a microwave oven including a power control relay circuit which is independently responsive to a user actuable momentary start switch and to a programmed electronic controller to facilitate operation in a delay start mode. T... | 08/06/1985 |
| 4490771 | Control circuit arrangement for an electromagnetically operated power tool A control circuit arrangement for an electromagnetically operated power tool has a primary circuit including a solenoid and a semi-conductor switch, in series, the semi-conductor switch being capable of being triggered into a conducting state upon applica... | 12/25/1984 |
| 4485342 | Load driving circuitry with load current sensing A testable load driving circuit apparatus includes a solid-state load driver for controlling AC current loads coupled in series with a winding of a saturable core reactor used for sensing the presence or absence of load current through a load current moni... | 11/27/1984 |
| 4480194 | Circuit for supplying a control contact with power and application thereof to the control of a rest time delay of a relay With this circuit, a current may be caused to flow through a contact (K) controlling the voltage supply of an electronic control circuit (24), of sufficient intensity for the reliability of the contact to be good, without the current flowing in the contro... | 10/30/1984 |
| 4473815 | Battery control and alarm system for vehicles A battery control and alarm system for a vehicle electrical system including a first, normally open, solenoid-actuated switch connected in series with the main battery cable; a second, magnetically actuated reed switch proximate the vehicle ignition switc... | 09/25/1984 |
| 4467219 | Variable time delay apparatus for controlling the start of a vehicle A circuit for providing an adjustable period of delay in a vehicle which is started by engaging the engine of the vehicle and a brake means, then disengaging the brake means after the period of delay, has a relay for selectively engaging and disengaging t... | 08/21/1984 |
| 4455587 | Electronic control circuit for the formation of a monostable switching behavior in a bistable relay An electronic control circuit for the formation of a monostable switching behavior in a bistable relay, including a logic circuit for the conversion of binary input signals into control signals for a switching circuit through which the direction of curren... | 06/19/1984 |
| 4451741 | Electronic control for an automobile air conditioner The invention is an improved control for an air conditioner unit in an automobile. The control operates on a time cycle basis instead of using a sensor of air temperatures. The installation is simple, requiring the severing of an electrical lead in the au... | 05/29/1984 |
