Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 4136304 | Control device for a braking mechanism using an energy-storing spring A control system for use with a braking mechanism which employs an energy-storing spring and an electric rotating servomotor is disclosed. The system operates employing a direct or indirect measurement of the stored braking force. When an indirect approac... | 01/23/1979 |
| 4130788 | Numerical control servo system An apparatus and method are disclosed for substantially improving the accuracy and surface finish quality of numerical control machine tool performance by generating velocity command signals for multiple axis drive systems based on the distance between th... | 12/19/1978 |
| 4119901 | Pulse to step motor stabilizing circuit A circuit for accepting a train of command pulses produced as a number of evenly spaced pulses for each consecutive equal time interval and which may have abrupt small changes in rates between adjacent time intervals and providing a motor pulse for each c... | 10/10/1978 |
| 4112338 | Wiring arrangement for blower motors of an air conditioner The running speeds of first and second electric motors can be controlled by a common voltage controller only by addition of an electromagnetic switch and a manual switch, the first and second motors being used for driving first and second blowers which ar... | 09/05/1978 |
| 4112344 | Record feeding apparatus and method There is disclosed a method of feeding record webs or sheets and apparatus for carrying out the method. The record feeding apparatus is shown in conjunction with a printing apparatus having a print head assembly, platen structure, a mechanism for severing... | 09/05/1978 |
| 4109190 | Circuit for increasing the operating speed range of a velocity servo system A velocity servo system for driving a motor to control the movement of a member. The system is comprised of means coupled to the motor for generating a signal indicative of the actual velocity of a member being driven by the motor, integrator means respon... | 08/22/1978 |
| 4107592 | Automatically operating speed-regulated positioning arrangement A machine is comprised of at least one machine part, such as a rotating shaft, which moves cyclically during performance by the machine of first and second operations. The machine also includes a controlled unit which undergoes changes of state for the pu... | 08/15/1978 |
| 4107590 | Power assist device using strain responsive means In apparatus wherein a massive component, such as the spot film device of an x-ray table, is driven to various positions with an electric motor drive, a handle is attached to the component for urging it in the desired direction. The handle is attached to ... | 08/15/1978 |
| 4105961 | Phonograph pick-up arm control arrangement This invention relates to arrangements for use in controlling the movement of a pivoted arm and it has particular, though not exclusive, application in controlling the movement of a phonograph pick-up arm.... | 08/08/1978 |
| 4104573 | Speed control device for a moving member A speed control device for a moving member which comprises a moving member, driving mechanism for the moving member, position coherent light containing a position information of the moving member, reference coherent light so formed as to not containing th... | 08/01/1978 |
| 4103210 | Draw twisting machine A draw twisting machine is provided with a plurality of synchronous motors which drive respective draw rollers. The synchronous motors are supplied with electrical power from an A.C. generator having a variable frequency output. The A.C. generator is driv... | 07/25/1978 |
| 4103216 | Stepping motor closed loop constant velocity control system A closed loop control system for controlling the rotational velocity of a stepping motor during a period of continuous shaft rotation such that the velocity remains constant is disclosed. Step response signals are developed for each step increment of move... | 07/25/1978 |
| 4100471 | Stepping motor control circuit A control circuit for a stepping motor is provided which rotates the motor armature in such a manner as to minimize motor resonances while not appreciably reducing the motor torque at high speeds. The motor inherently possesses a non-linear transfer funct... | 07/11/1978 |
| 4099114 | Servo stop system A servo system is disclosed which produces a mechanical position varying in accordance with variations in an electrical input signal. The input signal is applied by an amplifying channel to one input of an error amplifier. The input signal amplifying chan... | 07/04/1978 |
| 4099113 | Numerical control servo system A numerical control servo system, in which a set value in a setting memory and a measured numerical value corresponding to a controlled variable are subtracted one from the other by means of a digital subtractor and an object to be controlled is controlle... | 07/04/1978 |
| 4099102 | Movable feeding apparatus for high shelf storage devices A high shelf feeding apparatus is movable on rollers riding on rails. It is moved either by motor driven friction gear drive means or by a linear motor means. In either case, the drive elements are operated at the same acceleration or at the same number o... | 07/04/1978 |
| 4096420 | Control circuit for a brushless D.C. motor The invention relates to a control circuit for a brushless self-starting D.C. motor of the type which has a permanent magnet rotor and a stator coil, a magnetic field-dependent component subjected to the rotor field to determine the rotary position, and a... | 06/20/1978 |
| 4096427 | Nutation damping in dual-spin stabilized devices A motor active nutation damping system employing a rotor mounted accelerometer, a platform/rotor relative rate sensor, a despin motor and a controller. In the presence of nutation, the accelerometer senses a sinusoidal acceleration whose amplitude is prop... | 06/20/1978 |
| 4096425 | Servo systems A servo control system comprising, in a feedback loop, means for providing an error signal representing the difference between desired and actual conditions of a controlled system, and means responsive to said error signal to produce a control signal for ... | 06/20/1978 |
| 4095160 | Control arrangement for causing track supported implement to remain in parallelism with itself A control arrangement, especially for use with a track supported implement, having an elongated beam with carriages at the opposite ends supported on respective tracks in which pick-up elements on at least one of the carriages are sensitive to movement of... | 06/13/1978 |
| 4095157 | Digital servomechanism control system A digital control system is provided for regulating the position and velocity of a load. Within the control system, both commanded and actual motion of the load are represented by a bi-directional pulse train in which each pulse represents an increment of... | 06/13/1978 |
| 4095159 | Electronic apparatus for automatic closed loop positioning of mobile members associated with an electromagnetic transducer with two pairs of windings This invention relates to an electronic apparatus for automatic positioning and distance measurement of mobile members. The apparatus according to the invention comprises a rotary electromagnetic transducer with two pairs of windings, in which the primary... | 06/13/1978 |
| 4093904 | Multi-axis motion generator utilizing feedforward control Apparatus for generating synchronized multi-axis intermittent motion utilizing electronic encoding, memory and a position control system having feed-forward control. A plurality of slave shafts are rapidly and accurately positioned in response to the posi... | 06/06/1978 |
| 4092569 | Multiple armature permanent magnet motor/actuators This disclosure relates to electric motor/actuators and in particular to an electric motor/actuator including multiple non-magnetic armatures having commutated windings rotatable in a single air gap formed between opposing permanent magnets having their o... | 05/30/1978 |
| 4092578 | Elimination of voter caused deadzone A redundant channel control system includes one or more voters having a high-pass filter connected between a pair of voter inputs.... | 05/30/1978 |
| 4090121 | Control circuit A process controller which has at least a derivative control mode includes a comparison amplifier wherein a measured variable signal is compared with a set-point signal to produce an error signal. An auxiliary control circuit including a signal level chan... | 05/16/1978 |
| 4088936 | Tire inspection system An automated tire inspection system employs penetrative emanation such as X-radiation to inspect the integrity of portions of tires fed sequentially along a feed path through a centering station and into a shielded enclosure where an inspection station is... | 05/09/1978 |
| 4087732 | Digital stepping motor device circuit A control circuit for a stepping motor is provided which rotates the motor armature in such a manner as to minimize motor resonance while not appreciably reducing the motor torque at high speeds. The circuit includes means for receiving an input signal in... | 05/02/1978 |
| 4087730 | Electric control circuit At least one comparator circuit and one timing circuit are provided so that the operation of a control element in response to the tensing of the muscles of a patient depends upon the time duration during which the patient tenses the muscle. Further timing... | 05/02/1978 |
| 4086505 | Electromagnetic system An electromagnetic system for more efficiently utilizing energy wherein an outside power source is utilized to rotate a flywheel to a predetermined velocity. A plurality of armatures mounted on the periphery of the flywheel pass through a plurality of mag... | 04/25/1978 |
| 4085357 | Synchronous switching means for operating cable marking apparatus This application discloses cable length measuring apparatus for accurately determining the length of cable at spaced locations by utilizing at least two sets of measuring devices driven by the cable. Electronic switching means receive the length data from... | 04/18/1978 |
| 4084117 | Procedure for tightening tape wraps on a spindle In a rotating head magnetic tape transport, magnetic media is transported from a supply spool to a take-up spool. Interlayer slippage, due to air entrapped between tape layers, is reduced by impressing a waveform on the take-up spool motor voltage during ... | 04/11/1978 |
| 4084118 | Synchrotransmission system controlled by Hall effect A system for the synhchrotransmission of angular position data between two rotating shafts, using, as the transmitter and receiver, two two-phase Hall effect motors, of which each rotor 2, 52 has a permanent magnet and each stator is formed by two winding... | 04/11/1978 |
| 4084116 | Procedure for tightening tape wraps on a spindle During a search operation in a rotating magnetic head tape transport, the tape is transported from a supply spool via guides and a vacuum column past the rotating head read/write station to a take-up spool. As the tape is wound onto the take-up spool in l... | 04/11/1978 |
| 4082990 | Electrostatic pickoff and torquer An instrument which performs with precision either as a pickoff or torquer and which is not subject to geometrical errors due to the electrodes going out of round. The pickoff electrodes of the instrument are mounted adjacent the end of the movable elemen... | 04/04/1978 |
| 4082987 | Method and control device for switch means adapted to modify the coupling of groups of elements of an electrochemical generator supplying an electric motor The method is especially suitable for two identical groups of elements, and for supplying a continuous current traction motor. The commutating means modifies the coupling of groups of elements from parallel to series and conversely, as a function of the p... | 04/04/1978 |
| 4081733 | Automatic control system with integrator offset 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... | 03/28/1978 |
| 4078195 | Adaptive control system for numerically controlled machine tools Prior art adaptive control systems for numerically-controlled milling machines are first discussed in which N/C instructions and adaptive control system data are obtained and stored in a storage medium utilizing a software routine which takes into conside... | 03/07/1978 |
| 4075542 | Inertia power system An inertia power system in which the rotational energy stored in a rotating inertia wheel is translated into useful work. The system includes an inertia wheel which is electrically driven. A magnetic clutch is provided for engaging and disengaging the rot... | 02/21/1978 |
| 4075541 | Direct current motor control device for use in battery automobiles A direct current motor control device for use in battery automobiles comprises a direct current motor to be driven by a plurality of battery groups each battery group delivering an equal voltage. The device comprises a battery change-over thyristor circui... | 02/21/1978 |
