Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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 |
| 7191031 | Reverse rotation preventing electronic cam curve generating method based on electronic cam type rotary cutter control and control device therefor It is an object of the invention to provide a reverse rotation preventing electronic cam curve generating method of an electronic cam type rotary cutter control which serves to prevent the reverse rotation of a cutter. According to the invention, there is pro... | 03/13/2007 |
| 7180255 | Controlling the release of a brush motor which has applied a load A method for controlling the release of a brush motor which has applied a load includes several steps. One step includes applying a release current to the brush motor to rotate the brush motor in a direction toward releasing the applied load of the brush motor. Anot... | 02/20/2007 |
| 7023163 | Fail-safe electric actuator using high voltage capacitors According to the present invention, a fail-safe circuit for controlling an actuator is provided with an input voltage which is rectified and converted to a DC voltage. The DC voltage is boosted to a high level, and high voltage storage capacitors are charged at this... | 04/04/2006 |
| 6998808 | Positioning apparatus using brushless motor A positioning apparatus having a brushless motor, a positioning mechanism, and a motor control circuit to rotate a rotor of the brushless motor by sequentially supplying a driving pulse to a plurality of fixed coils of the brushless motor. The motor control circuit ... | 02/14/2006 |
| 6979965 | Spring return actuator for a damper An actuator including an electric motor driven by a drive circuit powered by a power source, and a load coupled to the electric motor. The actuator further includes a spring biasing the load to a first position, and a microcontroller coupled to the electric motor to... | 12/27/2005 |
| 6154605 | Control device for diaphragm pump A control device for a DC motor driving a diaphragm pump including a pulse generating integral circuit and a variable voltage setting integral circuit. The variable voltage setting integral circuit sets a pulse-base voltage at a level such that the DC mot... | 11/28/2000 |
| 6100655 | Mechanical return fail-safe actuator for damper, valve, elevator or other positioning device The electrically powered actuator includes a capacitor for supplying supplemental electrical power to a motor in response to a loss of power to the motor from a main power source in order to enable the motor to overcome the magnetic resistance of the moto... | 08/08/2000 |
| 6081082 | Rotatable inverter Disclosed is a rotatable inverter. The rotatable inverter comprises a rotatable inverting means for inverting a DC power source to an AC power source by means of a rotational force, and a transformer which receives the AC power source inverted by the rota... | 06/27/2000 |
| 6021368 | Position detecting switch-combined electronic control unit for automatic transmission A compact-sized position detecting switch-combined electronic control unit disposed on the main body of an automatic transmission and used for detecting range positions chosen by a driver during a shifting operation. The control unit has a base board on w... | 02/01/2000 |
| 5872434 | Systems and methods for actuator power failure response A brushless DC motor is controlled by determining a speed of the motor and a line voltage supplying drivers of the motor. Based upon these determined values and predetermined motor performance data, a maximum PWM on-time is determined for drive signals su... | 02/16/1999 |
| 5621293 | Variable-reluctance servocontrolled linear motor The variable-reluctance servocontrolled linear motor comprises an electromagnet formed by a shell and by a winding around a displacement path, a magnetic portion mobile in the direction of displacement, guided mechanically so as to have a single degree of... | 04/15/1997 |
| 4556169 | On-off thermostat based modulating air flow controller A system for providing modulated air flow control in response to an on-off thermostat having an on-off thermostat, a self-returning, slow moving motor connected to the thermostat for moving in a first direction when the thermostat is on and moving in a se... | 12/03/1985 |
| 4551654 | Lighting control system and method A lighting control circuit responsive to amplitude variations related to the effects of movement on the reflection of electromagnetic energy at an ultrasonic frequency.... | 11/05/1985 |
| 4532460 | Pre-start rotor positioner for an electric vehicle A drivetrain (48) for an electric passenger vehicle (10) includes a battery (40) for energizing a single-phase A.C. traction motor (18) which drives a ground engaging wheel (12) through a multi-speed transaxle (20). The motor is characterized by an extern... | 07/30/1985 |
| 4473226 | Electric ratchet An electronic ratchet for allowing the application of mechanical resistance to an output shaft in one direction while ratcheting in the opposite direction, which comprises, in combination: (a) an electromagnetically controlled friction brake coupled to an outp... | 09/25/1984 |
| 4247822 | Frequency translation means A method and means for translating frequencies, as for example, to correct a frequency error Ɗfd introduced into a carrier signal of frequency fc, comprising means for dividing the resultant signal frequency (fc +Ɗf... | 01/27/1981 |
