Bizarre Patents
Process For Propelling Foodstuffs or the Like into a Crowd
A method of launching foodstuffs into a crowd for promotional and entertainment purposes.
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 |
| 7285129 | High efficiency tanning apparatus Tanning apparatuses and methods of operating tanning apparatuses for high efficiency use. In an embodiment, a tanning apparatus including a tanning lamp is operated by delivering a first input voltage to the tanning lamp to generate an ultraviolet radiation output. ... | 10/23/2007 |
| 7019473 | Noiseless driving circuit for DC motor A noiseless driving circuit for direct current (DC) motor is disclosed. The driving circuit uses a magnetic-field sensing circuit with a Hall sensor to sense the corresponding position of the permanent magnet rotor. According to the corresponding position of the per... | 03/28/2006 |
| 5969443 | Electromagnetic actuating device An electromagnetic actuating device comprises a solenoid coil to which a control current can be applied and an armature associated with the solenoid coil which is adapted to carry out movements which are dependent upon a control current flowing through th... | 10/19/1999 |
| 5880567 | Servomechanism with position/rate control A servomechanism is controlled to move at a rate below a critical limit by means of a feedback controller (10) which is responsive to the output of a rate measurement device (9). The feedback controller (10) has a non-linear response whose effect only bec... | 03/09/1999 |
| 5721477 | Nonlinear proportional integral controller A method and apparatus for controlling a hydraulic manipulator defines a position error signal (θe), defining a first control signal (UP, UPD) based on the position error (θe) and generating an improved positi... | 02/24/1998 |
| 5694016 | Method for controlling a servo system having friction A method for controlling a servo system (10) having friction, in which the non-linear characteristic (20) of the position controller (12) is defined such that the magnitude of the variable Ns, Vs supplied to the servo system (10) having friction in the ca... | 12/02/1997 |
| 5640074 | Vibration dampening method and apparatus for band driven precision motion systems A method and apparatus are disclosed for joining a drive band to the driven element of a servo-controlled precision motion system. A vibration dampening clamp assembly absorbs unwanted vibration energy. The clamp assembly utilizes energy absorbing molded ... | 06/17/1997 |
| 5627421 | High efficiency drive circuit for an active magnetic bearing system A plurality of electromagnetics in an array surround a shaft, with current controlled in the coils of the electromagnets to support the shaft at a desired position approximately centered between the electromagnets. Shaft position sensors provide feedback ... | 05/06/1997 |
| 5179330 | Control circuit for an electrically controlled servo device A control circuit includes a microprocessor, a table store and an amplifier stage to control a controlled device which has a non-linear or linear, but discontinuous response curve. To obtain a linear response curve of the controlled device the table store... | 01/12/1993 |
| 5119003 | Non-linear dynamic compensation system A non-linear dynamic compensation subsystem is added in the feedback loop of a high precision optical mirror positioning control system to smoothly alter the control system response bandwidth from a relatively wide response bandwidth optimized for speed o... | 06/02/1992 |
| 4872190 | Spot filmer cassette transport vibration support A system and method is disclosed for minimizing residual vibration of a radiographic system due to rapid movement of a radiographic film cassette between a park and expose position. The cassette is moved by a servo system including a servo motor which is ... | 10/03/1989 |
| 4642541 | Track following servo for higher density disk files Described is a novel technique and associated arrangement for determining the noise-free value of a system parameter (e.g., head position in a disk drive) which is time variable and (usually) has a noise component as detected. The technique involves proce... | 02/10/1987 |
| 4636700 | Position servo system A servo system 10 (FIG. 1) for positioning a sighting mirror 11 connected to a pulley 16 comprises a drive motor 13 rigidly connected to a drive pulley 15 in turn coupled by a tensioned drive belt to the pulley 16. Angular position of the motor or pulley ... | 01/13/1987 |
| 4538493 | Machine tool for working sheet metal A machine tool for working sheet metal is described. The principal characteristic of the present invention lies in the fact that it comprises electronic apparatus operable to control the adjustment of the stroke of a striker which can strike a pin support... | 09/03/1985 |
| 4298833 | Apparatus for damping operator induced oscillations of a controlled system Apparatus for damping operator induced oscillations of a controlled system responding to an operator controlled signal (DEP) utilizing a lag-lead filter (14) for frequency and amplitude estimation of the control input, and a rectification and smoothing fi... | 11/03/1981 |
| 4284942 | Load driving apparatus Load actuating servomechanism apparatus includes dynamic regeneration and a mechanically damped motor-load coupling to equalize and overcome a frequency-varying load/load drive train mechanical resonance. The drive circuitry comprises a per se conventiona... | 08/18/1981 |
| 4268785 | Transient overshoot, undershoot and delay compensation circuit in systems comprising reactive filter networks A compensation circuit for overshoot, undershoot and delay occurring in response to sudden D. C. level changes in signals received by reactive filters. A D. C. level change, represented by an input signal step applied to the reactive filter is detected by... | 05/19/1981 |
| 4207506 | Servo system with reduction of transient error and settling time A servo system wherein an actuating signal obtained by the subtraction of a controlled variable delivered from a controlled system from a secondary command variable is applied to the controlled system, the actuating signal is added to the command to provi... | 06/10/1980 |
| 4197577 | Control system A control system of the non-linear type which behaves in a substantially `proportional` manner. The system comprises an error detector which compares the input and output of a plant to obtain an error value, and a control unit which derives from the error... | 04/08/1980 |
| 4051423 | Servo system with feedback signal compensation A signal compensator for a position servo loop system to attenuate the position error signal and provide stability at a larger band width by limiting the position actuator current in selected frequency ranges.... | 09/27/1977 |
| 4042868 | Stepper motor control apparatus A control system using a duty cycle converter to convert an analog input into both a second order or velocity squared feedback as well as a set of clockwise and counterclockwise pulse trains the frequency of which is dependent upon the amplitude of the in... | 08/16/1977 |
