Bizarre Patents
A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 4840586 | Keying apparatus for connecting a printed wiring assembly to a backplane structure A keying apparatus is provided including a key support structure having a plurality of protrusions which mate with a corresponding plurality of recesses formed in an edge surface of a printed wiring assembly. The key support structure includes a mechanism... | 06/20/1989 |
| 4799052 | Method for communicating data on a communication network by token passing A method of determining access on an electronic serial bus by implicit token passing. The serial bus receives and transmits data between a plurality of devices. Each device has a receiver for receiving data to the serial bus, a transmitter for transmittin... | 01/17/1989 |
| 4764713 | Method for starting a variable voltage inverter with a pre-spinning load motor A method for providing a smooth transition to powered operation in a motor control system in which a variable voltage inverter regulates power to the motor on a volts per Hertz basis. The method is particularly applicable to systems for energizing and rap... | 08/16/1988 |
| 4764868 | Distributed input/output system An intelligent input/output system for a programmable controller includes a plurality of input/output (I/O) modules, each of which may be located in proximity to the process being controlled. Each module is interconnected, via a communications link, to a ... | 08/16/1988 |
| 4761600 | Dynamic brake control A dynamic brake control system for an alternating current motor powered by a variable voltage, variable frequency inverter which regulates the speed of the motor. An AC to DC converter converts AC line power to DC power with the DC power being transferred... | 08/02/1988 |
| 4752886 | Method for on-line testing of load control circuitry and the associated load A method is disclosed for determining the operability of a switching device controlling an electrical load and the status of the load as open, shorted, or normally connected, without disruption of the operative state of the load. The method includes the s... | 06/21/1988 |
| 4730151 | Continuous field control of series wound motors A method for operating an electronic control system for an operator controlled, electrically driven vehicle. The vehicle being powered by a direct current electric traction motor. The electronic control system includes a power source, a variable mark-spac... | 03/08/1988 |
| 4722135 | Apparatus for placing surface mounting devices on a printer circuit board The disclosed invention provides manually operated apparatus for precise placement of surface mounting integrated circuit devices on a printed circuit board. A dispensing unit operates to position a device into an oriented, predetermined position with res... | 02/02/1988 |
| 4718003 | Method and apparatus for exchanging data between data processing units Apparatus whereby data processing units exchange information with each other through a common memory without delay caused by limiting access to the memory to one data processing unit at a time. The invention includes a pair of random access memories (RAMS); a ... | 01/05/1988 |
| 4710725 | Preamplifier for an imaging system A preamplifier for use in an imaging system including a charge-injection device employs an amplifier, at least a first switch and a clamping loop. The switch is capable of grounding the amplifier reference outside the blanking interval and is open during ... | 12/01/1987 |
| 4702711 | Snap-action bayonet-type fastening device for control and/or signalling units A snap-action bayonet-type fastening device for control and/or signalling units comprises an annular element placed between the operative unit and said control and/or signalling unit having the form of a coupling ferrule comprising a cornice with protuber... | 10/27/1987 |
| 4698577 | Method of digital flux reconstruction with DC elimination A method for developing current control signals from motor terminal voltage in the control of alternating current electric motors which utilize electric current control signals oriented to the phase of a flux component in a rotating field for applying cur... | 10/06/1987 |
| 4682806 | Quadruple gripper A central base of a gripper is adapted to be attached to a robot wrist flange. Carriage rods and stabilizing bars extend outwardly, on both sides of the central base. Sliding carriages, which move along the carriage rods on linear bearings, each carry two... | 07/28/1987 |
| 4683411 | Synchronous motor protection A digital controller for synchronous motors prevents excessive heating of squirrel cage windings during motor starting. It reduces motor excitation if the actual accrued excitation time exceeds the maximum allowable excitation time of the controlled motor... | 07/28/1987 |
| 4680519 | Recursive methods for world-to-joint transformation for a robot manipulator A method for controlling an articulated robot manipulator with an offset wrist made with only rotary joints. The method relates to transforming a given position and orientation of the robot tool or end effector in Cartesian space to the equivalent joint a... | 07/14/1987 |
| 4677360 | Field weakening induction drive A speed control using decoupled flux and torque commands obtains constant horsepower operation by modifying the slip according to the torque requirements. The slip is modified by a value representative of the torque producing current. Control is kept in t... | 06/30/1987 |
| 4663726 | Robot control utilizing cubic spline interpolation An end effector move is executed by transforming the end effector position and orientation into joint coordinates at a large number of points on the end effector trajectory. On-line joint trajectories are determined in real time by looking ahead a few poi... | 05/05/1987 |
| 4658192 | Programmable deadband current regulator A method for supplying the excitation to a four quadrant drive DC electric motor having a forward and reverse controllable bridge rectifier power regulators for controlling the direction of motor rotation. The motor control system is capable of operating ... | 04/14/1987 |
| 4649328 | Method for automatic speed loop tune-up in a machine drive Motor-load inertia of a drive system is determined from motor friction current and the time required to accelerate and decelerate to a predetermined speed in response to a current command. A desired response time provided by the operator is checked to det... | 03/10/1987 |
| 4648028 | Color enhanced display for a numerical control system Color is added to the standard video display (18) of a computer numerical control system for controlling the operation of a machine tool (10) in the performance of specified operations with respect to a workpiece. Color assignment records (62) are include... | 03/03/1987 |
| 4641074 | Synchronous motor protection A digital controller for synchronous motors prevents excessive heating of squirrel cage windings during motor starting. It reduces motor excitation if the actual accrued excitation time exceeds the maximum allowable excitation time of the controlled motor... | 02/03/1987 |
| 4633241 | Method of automated in-place SCR testing An automated SCR cell test exercises each of the twelve SCRs in a dual, 3 phase, full wave SCR rectifier bridge singly to detect shorted SCRs and in pairs to detect open SCRs or faulty gate circuits.... | 12/30/1986 |
| 4628397 | Protected input/output circuitry for a programmable controller Input/output circuitry is disclosed for use in an I/O system of a programmable controller. The circuitry is protected against overcurrents without the use of fuses or circuit breakers, and is automatically restored to normal operation following correction... | 12/09/1986 |
| 4626013 | Dual axis gripper A dual axis gripper for use with a robot arm having a rotatable wrist is provided with a first and second gripper. A bracket couples the first gripper to the robot arm in line with an axis about which one form of robot wrist rotation occurs. The bracket a... | 12/02/1986 |
| 4612578 | Imager system for non-destructive profile read-out A method and apparatus for obtaining a profile read-out of an object in a field of view of a solid-state imager without destruction of the image data at the imager. In an application using a CID imager, X-axis and Y-axis projections of the array are obtai... | 09/16/1986 |
| 4605969 | Video pattern noise processor Low-frequency noise in the video output of a charge-injection-device imager is cancelled by delaying the low-frequency components of video plus noise for one horizontal interval and subtracting therefrom the undelayed noise from corresponding cells of the... | 08/12/1986 |
| 4606001 | Customized canned cycles for computer numerical control system A method for defining and executing customized canned cycles for a numerically controlled machine in which the end user or original equipment manufacturer can define a sequence of actions or tasks to do precisely what a particular application warrants. Th... | 08/12/1986 |
| 4593380 | Dual function input/output for a programmable controller The invention disclosed provides circuitry which is selectively operable either as an input point or as an output point in a programmable controller having multiple input and output points for exchanging signals between a central processing unit (CPU) of ... | 06/03/1986 |
| 4580225 | Method for producing multiple entry threads A method is disclosed for machining multiple entry threads on a workpiece. The preferred steps of the method are preferably carried out in conjunction with a computer-based numerical control system. The method includes the steps of: determining the angula... | 04/01/1986 |
| 4573139 | System for position sensing transducers An interfacing system for selectably interfacing signals to a computer, or other control apparatus such as a numerical control system, from either of alternative transducers which provide position indicative signals differing in format. A system according... | 02/25/1986 |
| 4562392 | Stylus type touch probe system A non-cutting tool or stylus (32), mounted in a position where a tool normally resides on a turret (26) of a numerically controlled machining system, rubs against the workpiece (41) as it rotates. The rubbing vibrations emanating from the workpiece (41) a... | 12/31/1985 |
| 4520299 | Turning speed controller for electric vehicles having dual drive motors The invention disclosed provides a control system for an electric vehicle which automatically slows the vehicle during a turn and causes it to be increasingly slowed as the sharpness of the turn increases. The invention includes means for regulating the f... | 05/28/1985 |
| 4514814 | Multi-processor axis control A method for operating a computer controlled industrial machine in which a plurality of axes of motion are independently controlled. The method utilizes programmable data processors to enable the production of motion command signals to the servo drives of... | 04/30/1985 |
| 4514677 | Two stage electrical braking for a variable speed AC induction motor A two-stage electrical braking system for a variable speed alternating current induction motor powered from a variable frequency, variable voltage power source utilizes capacitance connected across a primary winding of the motor in a first stage of brakin... | 04/30/1985 |
| 4513379 | Customization window for a computer numerical control system A bidirectional communications link, termed a customization window, comprises a series of routines including functions, procedures and status flags implemented in software, interfaced between a machine control logic (MCL) operating to control the auxiliar... | 04/23/1985 |
| 4513380 | Method of tool recovery in threadcutting apparatus A method for operating a computer controlled industrial machine, such as a lathe, in which a machining operation can be interrupted, a tool displaced from a workpiece and the operation subsequently resumed at the point of interruption. The method includes... | 04/23/1985 |
| 4500818 | Dual motor proportioning control The invention disclosed is a control system for controlling a pair of separately excited motors arranged such that each motor of the pair drives a separate wheel on a common axle of an electrically powered vehicle. The control system continuously and indi... | 02/19/1985 |
| 4493032 | Method and apparatus for positioning using circular interpolation A method and apparatus are disclosed for providing very precise incremental motion of a numerically controlled machine tool, or other similarly controlled object, along a circularly arced path. For a mutually perpendicular X and Y coordinate system, X and... | 01/08/1985 |
| 4489377 | Method for preventing machine component interference A method for preventing interference between relatively moveable components of a computer controlled industrial machine in which the position of the moveable machine elements are controlled by a computer program. For each movement, the computer first dete... | 12/18/1984 |
| 4479080 | Electrical braking control for DC motors An electrical braking control circuit for use in a control system for a direct current traction motor which may be employed, for example, to propel an electrically driven vehicle. The electrical braking controller of the invention initiates electrical bra... | 10/23/1984 |
