Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7265516 | Linear electric motor controller and system for providing linear control The invention relates to a method of, and system for, linear speed control for an electric motor, in which a digital to analog converter means is used for converting an 8-bit digital signal to an analog voltage for setting voltage across a motor, a digital state mac... | 09/04/2007 |
| 7230345 | Method for exercising a stand-by electrical generator A method is provided for exercising an engine-driven, electrical generator. The generator has a first operation mode wherein the generator generates a predetermined output voltage at a predetermined frequency with the engine running a predetermined operating speed a... | 06/12/2007 |
| 7065435 | Control system for controlling the climate of a vehicle A control system for controlling the climate of a vehicle includes a control element, a temperature sensor, a motor and a microprocessor. The microprocessor may receive a temperature signal indicative of the temperature at the control element and may receive at leas... | 06/20/2006 |
| 7032568 | Fuel feed device of gas engine A fuel feed device of a gas engine of non-supercheged type for feeding air and fuel to an intake port without mixing by amixer, wherein fuel gas is fed into the intake port by utilizing a negative pressure generated in the intake port in an intake stroke. ... | 04/25/2006 |
| 6915777 | Control system for general-purpose engine A control system for general-purpose spark-ignition internal combustion engine to be used for a portable generator, etc., having one or two cylinders and an actuator connected to the throttle valve to open or close the throttle value. In the system, an adaptive cont... | 07/12/2005 |
| 6390061 | Magnetic linear actuator for controlling engine speed The present invention provides a cost-effective method and apparatus for controlling engine speed. One embodiment generally comprises a controller and a linear actuator. The controller generates a plurality of voltage pulses having a duration and frequenc... | 05/21/2002 |
| 5524588 | Electronic speed governor The low cost speed governor for internal combustion engines may be completely powered by the ignition coil. The governor receives a periodic signal from the primary ignition winding that is indicative of the actual speed of the engine. A pulsed speed sign... | 06/11/1996 |
| 5279271 | Control system for an internal combustion engine and/or motor vehicle The invention is directed to a control system in combination with an internal combustion engine and/or a motor vehicle especially in connection with the air metered to the engine. An electrically actuable element for influencing an operating variable of t... | 01/18/1994 |
| 5088461 | Throttle valve control system and the method therefor In the throttle valve control system for controlling a throttle valve by an actuator driven on the basis of PWM command signals generated according to accel pedal stroke and feed-backed throttle sensor signals, the throttle sensor signal obtained when the... | 02/18/1992 |
| 5012781 | Gas engine A small portable generator powered by a gas fueled internal combustion engine. The gas fuel supply system for the engine includes a solenoid value whose duty cycle is regulated so as to permit unthrottled operation of the engine and afford engine speed co... | 05/07/1991 |
| 4895118 | Valve control system of internal combustion engines A valve control system of an internal combustion engine has a control circuit comprising valve control quantity setting means for setting the control quantity of valve means installed in the engine in accordance with the operational state of the engine an... | 01/23/1990 |
| 4875447 | Method and apparatus for controlling the solenoid current of a solenoid valve which controls the amount of suction of air in an internal combustion engine A method and apparatus is provided for controlling the solenoid current of a solenoid valve which controls the amount of suction air in an internal combustion engine. A solenoid current control value is calculated as a function of engine operating conditi... | 10/24/1989 |
| 4745899 | Method and apparatus for controlling the solenoid current of a solenoid valve which controls the amount of suction of air in an internal combustion engine A method and apparatus are provided for controlling the solenoid current of a solenoid valve which controls the amount of suction air in an internal combustion engine. The actual solenoid current flowing through the solenoid is detected and a solenoid cur... | 05/24/1988 |
| 4648366 | Vehicle speed control device A system for automatically limiting the maximum speed of a vehicle to a predetermined maximum, particularly suitable for use with off-road vehicles such as aircraft deicing trucks. The system utilizes a magnetic Hall effect sensor to generate a speed sign... | 03/10/1987 |
| 4401075 | Automatic speed control for heavy vehicles An automatic speed control for a heavy duty vehicle includes a controller which regulates communication between a compressed air source and an air actuated throttle mechanism. The controller generates a control signal which is a function of a speed error ... | 08/30/1983 |
| 4389990 | Servo apparatus for an automatic speed control of vehicles A servo apparatus for automatic control of vehicle engine speed, in accordance with a speed error signal, has an electric motor connectable to open the engine throttle against a restoring force, and the motor torque is controlled by varying the pulse widt... | 06/28/1983 |
| 4372265 | Control circuit for engine speed governor with power take off A control circuit for a speed governor is disclosed which provides governing action of one type for operation in a normal engine speed governing mode and governing action of a different type for engine operation in a power take off (PTO) mode. In the norm... | 02/08/1983 |
| 4370960 | Engine speed control system An idle control system for an automobile internal combustion engine includes an idle control unit for controlling the operation of an electromagnetically operated actuator. While the engine has a combustible mixture intake passage leading to the engine an... | 02/01/1983 |
| 4359124 | Constant running speed control system for automobile A fluid actuator for electrically detecting the running speed of a vehicle and processing the detected data and an electric control system for driving said actuator are provided, and in the electric control system a delay involved in the response of the f... | 11/16/1982 |
| 4307690 | Electronic, variable speed engine governor A speed regulator or governor for an engine. The governor utilizes the approximate digital equivalent of a lead and a lag feedback network in combination with a stored, digital, nonlinear look-up table, or other nonlinear means, to control engine speed. T... | 12/29/1981 |
| 4297978 | Idling rotational speed control system for a diesel engine A diesel engine control system comprises an engine speed circuit for controlling the engine so that the rotational speed of the engine when idling is at least the required minimum rotational speed suited to the determined engine speed, engine temperature,... | 11/03/1981 |
| 4286685 | Speed control for heavy duty trucks An automatic speed control for a vehicle having a source of compressed air, such as a heavy duty truck, includes a logic controller which controls a pair of solenoid valves to regulate communication between the compressed air source and an air actuated th... | 09/01/1981 |
| 4279229 | Electronic injection-amount regulating apparatus in auto-ignited internal combustion engines An electronic injection-amount regulating apparatus in auto-ignited internal combustion engines in which the injection amount can be regulated by means of a regulator preferably having a PID characteristic and in which the injection amount is apportioned ... | 07/21/1981 |
| 4274376 | Governor apparatus and system A governor system for an engine motive fluid induction system is shown as having a solenoid operated valve assembly communicating with a source of vacuum and with a vacuum motor assembly operatively connected to a variably positionable throttle valve of t... | 06/23/1981 |
| 4245599 | Vehicle engine idle speed governor with unsymmetric correction rates A vehicle engine has a throttle stop positionable in response to an actuator command signal to determine engine idle speed. Apparatus is provided to generate a speed error signal having both an absolute value and a further characteristic indicative of hig... | 01/20/1981 |
| 4242994 | Idle speed control system for vehicle engines An idling speed control system for automotive vehicle engines is disclosed. A throttle valve bypass passage for intake air is provided with an air control valve of the on-off type. The air control valve is electrically energized by a pulse train of substa... | 01/06/1981 |
| 4232757 | Automobile speed control method and system Automobile speed control to maintain actual automobile speed at a desired automobile speed, in which a superposed electrical analog signal formed by a first electrical signal indicating actual automobile speed and a feedback signal indicating fuel injecti... | 11/11/1980 |
| 4203395 | Closed-loop idle speed control system for fuel-injected engines using pulse width modulation A closed loop idle speed controller for a fuel injection system operates to control an air valve which controls an air passage bypassing the main air flow. The air valve is positioned by an actuator whose output position is controlled by fuel pressure ope... | 05/20/1980 |
| 4134373 | Engine speed limiting control circuit A system for limiting the speed of a gasoline engine includes a circuit responsive to the engine speed which provides control signals to a solenoid valve which in turn controls a vacuum actuator. The vacuum actuator then overrides a manual throttle contro... | 01/16/1979 |
| 4098242 | Automatic control system with gain switching An automatic control system wherein repetitive pulses, the frequency of which is responsive to a remote condition, such as prime mover RPM, are converted to a DC voltage level. The voltage level is compared to a reference by a difference amplifier to prod... | 07/04/1978 |
| 4094378 | Vehicle constant speed control circuit To prevent hunting in an automatic vehicle speed maintenance circuit having a closed control loop, the control element is so arranged that the controller has not only proportional, but additionally derivative control characteristics to increase the respon... | 06/13/1978 |
| 4075983 | Electronic circuitry for maintaining constant engine speed fuel injection Electrical signals from a vehicle distributor are processed by a pulse geating circuit. Generated pulses are integrated to form an analog signal which is linearly proportional to engine speed. The analog signal is algebraically summed with an analog sign... | 02/28/1978 |
| 3998191 | Engine speed limiting control circuit A system for limiting the speed of a gasoline engine includes a circuit responsive to the engine speed which provides control signals to a solenoid valve which in turn controls a vacuum actuator. The vacuum actuator then overrides a manual throttle contro... | 12/21/1976 |
| 3952829 | Vehicle speed control circuit An apparatus for automatically maintaining the speed of a vehicle at a desired road speed as selected by the vehicle operator. When the operator actuates the control circuit, a desired road speed signal proportional to the vehicle road speed at that momen... | 04/27/1976 |
| 3941202 | Digital speed control The present invention relates to a digital system for maintaining the speed of a motor vehicle at a preselected speed. The desired speed of the vehicle is set into a digital memory bank and the instantaneous actual speed of the vehicle is determined by a ... | 03/02/1976 |
