Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7291997 | Servo system A motor has built therein a brake for stopping the rotation of the motor and a brake controlling circuit for controlling the brake. The motor is further provided with a bypass circuit for supplying an electric power directly to the brake and a terminal for connectin... | 11/06/2007 |
| 7015670 | Method of controlling a high-friction electro-mechanical servo-mechanism to minimize the power needed to hold a loaded output member The invention provides a method for controlling an electromechanical servomechanism (20) for moving an output member relative to a variable load (38). The servomechanism includes: a motor (37) having at least one coil (32A, 32B or ... | 03/21/2006 |
| 6801010 | Vibration suppression positioning controller To provide a vibration-damping positioning controller capable of effecting stable positioning operation within a short period of time. The vibration-damping positioning controller has an integrator 6 for integrating a differential value of the target p... | 10/05/2004 |
| 6529173 | Automatic antenna direction controller An automatic antenna direction controller which automatically turns an antenna rotor and connected antenna to a desired direction which is preselected by a pointer knob. A dual use meter needle is utilized by action of the pointer knob to select the azimu... | 03/04/2003 |
| 6441573 | Blended electrical/friction braking system with electric brake feedback monitor and method of use thereof A blended electrical/friction braking system includes an electric brake feedback monitor which monitors a first signal corresponding to an electric brake effort request of an electric motor of an electrically powered vehicle. The electric brake feedback m... | 08/27/2002 |
| 4941553 | Vehicle braking system A braking system for a vehicle has a stepper motor which controls the application of friction elements to a rotating part such as a brake drum. A control circuit controls the motor so that an output member is positioned by the motor in accordance with a v... | 07/17/1990 |
| 4710689 | Device for preventing backlash on a fishing reel A fishing reel that includes an eddy current brake mechanism that applies a braking force to the spool of the reel when the speed or acceleration of the spool, as detected electrically, reaches a predetermined value. The reel further includes electrical m... | 12/01/1987 |
| 4390260 | Play control for a threaded drive The invention contemplates a precisely adjustable threaded mechanism, as for focus adjustment of an aerial camera lens, wherein inner and outer threaded members are normally in circumferentially continuous radially stressed play-free engagement to the ext... | 06/28/1983 |
| 4364002 | Control of operation of loom A method and an apparatus for controlling operation of at least one operating element of a loom on the basis of a reference signal are disclosed. A rotational position signal developed during each weaving cycle of the loom is compared with the reference s... | 12/14/1982 |
| 4325014 | Automatic control unit for a wind-following rotor A control unit for automatically controlling the angular position of a reversible, motorized device, such as an antenna rotor, in response to a signal from an external sensor, such as a potentiometer coupled to the rotating shaft of a windvane. The unit i... | 04/13/1982 |
| 4318095 | Digital input apparatus Switch apparatus having a digital display is provided in accordance with the teachings of the present invention. The switch apparatus according to the present invention includes an encoder having a code pattern thereon which is scanned by a reader to prod... | 03/02/1982 |
| 4316131 | Control apparatus of flying shears In a control apparatus of a flying shear wherein a clutch is actuated to transmit the rotation of a drive motor to a cutting blade to rotate the same for achieving cutting and then the clutch is disengaged and the cutting blade is stopped by means of a br... | 02/16/1982 |
| 4300082 | Speed-regulated positioning drive The drive shaft of a motor can be coupled to an output shaft by an electromagnetically activated friction clutch. The output shaft can be braked by an electromagnetically activated friction brake. The motor drive shaft rotates at constant speed. The rotar... | 11/10/1981 |
| 4250440 | Multiple-purpose closed-loop, automatic control system A multiple-purpose, closed-loop, automatic control system comprising: a system controlled; a detecting means for detecting a controlled variable output from the system controlled and converting the controlled variable into an electrical feedback signal; a sign... | 02/10/1981 |
| 4228385 | Speed-regulated positioning drive The drive shaft of a motor can be coupled to an output shaft by an electromagnetically activated friction clutch. The output shaft can be braked by an electromagnetically activated friction brake. The motor drive shaft rotates at constant speed. The rotar... | 10/14/1980 |
| 4159445 | Multiple purpose feedback control system Multiple purpose feedback control system comprising and characterized by a detecting means for detecting the controlled variable and converting the detected variable into a feedback signal output; a signal converting means for receiving the feedback signa... | 06/26/1979 |
| 4011510 | Signal-responsive apparatus having magnetic-particle-friction memory Signal-processing apparatus for use with industrial instrumentation systems and the like, and comprising memory means to maintain a signal level for long time periods without drift. An input signal level is translated into the positioning of a movable mem... | 03/08/1977 |
| 3995206 | Apparatus for transferring articles through various processing sectors of a manufacturing system A material transfer apparatus which includes a carriage whose movement is controlled along a path between specified locations thereon. The carriage includes means for dynamically indicating its present location on the path which is compared with a specifi... | 11/30/1976 |
