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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7292025 | Bipolar interrogation for magnetostrictive transducers A magnetostrictive-based sensor is disclosed which obtains higher return signals through the use of multiple consecutive input pulses. ... | 11/06/2007 |
| 7042174 | Method of generating independent top and bottom corners correction using one 4th order function A method and circuit for generating independent top and bottom corner correction using a single fourth order function is described. The top and bottom corner correction signal may be included in an east-west corrected voltage to correct an asymmetry of a picture wit... | 05/09/2006 |
| 6980077 | Composite magnetic core for switch-mode power converters A composite magnetic core formed of a high permeability material and a lower permeability, high saturation flux density material prevents core saturation without an air gap and reduces eddy current losses and loss of inductance. The composite core is configured such... | 12/27/2005 |
| 6515439 | Vertical deflection driving circuit Circuit means absorbing counter-electromotive voltage generated by a vertical deflection yoke coil DY while scanning period is provided in a vertical deflection driving circuit of PWM method. Because a MOS transistor TR4 for pumping-up switching is on whi... | 02/04/2003 |
| 5600212 | Deflection circuit for a television receiver using symmetrical deflection A deflection method and circuit for symmetrical horizontal scanning in a television tube utilizes a vertical deflection coil and an auxiliary vertical deflection coil. The vertical deflection coil is energized with a sawtooth vertical scanning current hav... | 02/04/1997 |
| 5448140 | Image display apparatus with a deflection circuit having function for correcting rotational distortion A first modulating wave current synchronized with a vertical sync signal and, having the same period as the vertical sync signal, is superposed on a horizontal deflection current caused to flow through a horizontal deflection coil of a CRT, and a second m... | 09/05/1995 |
| 5287041 | Side pin cushion circuit A side pin cushion circuit for keeping exact the period corresponding to the frequency of a synchronizing signal so as to prevent a pin cushion distortion in a cathode ray tube displayer. The side pin cushion circuit comprises a vertical deflection portio... | 02/15/1994 |
| 5111120 | Raster corrected vertical deflection circuit Two windings of a flyback transformer in a horizontal deflection circuit are inductively coupled with opposite polarity to a source of horizontal rate retrace pulses. The windings have a common junction coupled to ground. A circuit energized by the retrac... | 05/05/1992 |
| 4864197 | Horizontal deflection circuit for video display monitor A horizontal deflection circuit for controlling the horizontal deflection of an electron beam in a cathode ray tube used, for example, in a video display. The circuit uses a plurality of MOSFET transistors, which are switched on and off in unison for swit... | 09/05/1989 |
| 4633144 | Dynamic focus signal shaper A dynamic signal shaper for a cathode ray tube display system is described. In some cathode ray tubes an electromagnetic lens is driven by a correction signal derived from the beam deflection signals. The required correction signal is proportional to the ... | 12/30/1986 |
| 4581563 | Variable format controls CRT raster Feedback loops monitor the vertical and horizontal deflection yoke drive voltages of the CRT and separately compare each potential with a voltage which represents full screen deflection. Error voltage resulting from these comparisons adjust the power supp... | 04/08/1986 |
| 4550271 | Gyromagnetron amplifier A gyromagnetron amplifier for radiation at millimeter wavelengths comprising a tapered waveguide tube with longitudinally running vanes in the walls of the tube with the number of vanes chosen to coincide with a desired cyclotron harmonic frequency to be ... | 10/29/1985 |
| 4549118 | Step waveform generator and CRT vertical timebase incorporating such a generator A step waveform generator includes a cup and bucket circuit in which charging and discharging a cup capacitor (C1) with predetermined units of charge is achieved, in response to a train of pulses supplied to its input terminal (1), by means of an operatio... | 10/22/1985 |
| 4544864 | Switched vertical deflection circuit with bidirectional power supply A switched vertical deflection circuit derives vertical deflection current from horizontal deflection energy. A single switching element operates during both horizontal trace and retrace intervals. Conduction of the switching element is controlled by a ve... | 10/01/1985 |
| 4425533 | Generator for producing a d.c. supply voltage in a television receiver comprising a vertical scanning circuit The current which passes through the vertical deflector of a transistorized color television receiver is produced by a circuit comprising an active switch controlled and modulated at the line frequency and supplied by line retrace pulses delivered by the ... | 01/10/1984 |
| 4362973 | Aesthetically pleasing CRT-display of single-source signals An aesthetically pleasing Lissajous figure is derived from a single signal source which feeds a common signal to both the horizontal and vertical deflection circuits of a cathode ray tube. Between the signal source and one or the other of said deflection ... | 12/07/1982 |
| 4338549 | Vertical deflection circuit A synchronous switched vertical deflection circuit for use with a television receiver comprises first and second bidirectional switches coupled to conduct current in opposite directions. Horizontal rate energy is coupled into one end of the switches. Vert... | 07/06/1982 |
| 4335333 | Raster scan color display system and method having improved pin cushion non-linearity correction A raster scan color display system for a CRT includes a vertical sweep system wherein a parabolic signal repeating at the horizontal sweep rate is multiplied with a vertical sweep signal corresponding to a linear ramp repeating at a vertical deflection ra... | 06/15/1982 |
| 4329729 | Side pincushion modulator circuit with overstress protection A side pincushion corrected deflection circuit for a television receiver includes a deflection winding, a trace capacitor and a first switch for generating scanning current in the deflection winding. A modulator circuit includes a modulator inductor and c... | 05/11/1982 |
| 4327312 | Circular raster sweep generator A sweep generator for producing a circular raster of curved scanning lines on the target surface of a video camera is disclosed. Each curved trace follows a substantially circular path through a scanning angle of 360°. The circular raster is generated by... | 04/27/1982 |
| 4292567 | In-band resonant loss in TWT's In traveling wave tubes with broad bandwidth, such as an octave or more, the gain varies by many dB across the band. One or more lossy circuits inside the tube coupled to the interaction helix-type slow-wave circuit are resonant at frequencies within the ... | 09/29/1981 |
| 4278919 | Television vertical deflection circuit utilizing comparators The horizontal frequency control pulses of, respectively, increasing and decreasing pulse widths required by switches which control the transfer of energy from the horizontal output stage to the vertical deflection coils are furnished by a first and secon... | 07/14/1981 |
| 4243915 | Delay line comprising coupled cavities and cooled by fluid-circulation The external outline of the transverse section of the walls externally bounding the cavities (4) is circular, but the thickness of these walls is not constant, being smaller in the zones of these walls which are not traversed by the cooling ducts (5) than... | 01/06/1981 |
| 4238712 | Switched vertical deflection with triac An SCR is one controllable switch thyristor in an SSVD circuit and the other is a triac. One electrode of each thyristor is grounded, and the gates of the thyristors are driven from the SSVD control circuit by pulse voltages relative to ground.... | 12/09/1980 |
| 4234826 | Synchronous switched vertical deflection driven during both trace and retrace intervals A television synchronous switched vertical deflection circuit couples energy from horizontal deflection circuit to a vertical deflection winding by means of a pair of controllable switches to form the vertical deflection current. One switch of the pair co... | 11/18/1980 |
| 4232249 | Beam-switched traveling wave tube A traveling wave tube arrangement for use in satellite communications systems is disclosed wherein a plurality of traveling wave tube delay structures and an electron gun are contained in a single envelope with beam deflection apparatus. The electron beam... | 11/04/1980 |
| 4220898 | Raster distortion correction circuit A synchronous switched vertical deflection (SSVD) circuit is coupled by a flyback transformer to a horizontal deflection circuit. The SSVD circuit loads the horizontal deflection circuit at a vertical parabolic rate providing East-West pincushion correcti... | 09/02/1980 |
| 4198591 | Vertical deflecting circuit A vertical deflecting circuit for a television receiver having a first signal source for supplying a first signal which has a sawtooth wave shape and a vertical period, second signal source for supplying a corrected signal having a horizontal period, a ve... | 04/15/1980 |
| 4160936 | Fast-start vertical current feedback circuit A vertical deflection amplifier includes a preamplifier having an input at which is applied a DC feedback signal for the stabilization of the amplifier's DC output. In order to assure an undistorted or unattenuated vertical deflection upon initial turn-on... | 07/10/1979 |
| 4157487 | Television receiver vertical deflection system and method To permit use of a circuit in which the energy derived during horizontal flyback is used to control vertical deflection, without damage to the vertical deflection system upon vertical flyback, the vertical deflection output stage is dimensioned to have a ... | 06/05/1979 |
| 4149107 | Backward wave oscillator tube for the production of microwave The present invention relates to a backward wave mode travelling wave oscillator tube. The delay line is in two sections of dissimilar length, 40 and 42, aligned in the direction of propagation of the electron beam (the cross-hatched area); the second 42 ... | 04/10/1979 |
| 4129804 | Image display device commutator Electrodes in an image display device are biased by a circuit composed of a first switch means for applying a first potential to one of at least two sets of alternate electrodes. The circuit also includes means for isolating each of the electrodes in a gi... | 12/12/1978 |
| 4118656 | North-south pincushion distortion correction circuit A first capacitor is coupled in parallel with a vertical deflection winding and the two are coupled to a source of horizontal rate energy by means which permit the capacitor to be charged with decreasing and increasing amounts of horizontal rate energy du... | 10/03/1978 |
| 4117380 | Transformer arrangement for synchronously switched vertical deflection system A horizontal deflection circuit drives a voltage generator by way of a first transformer, and also drives a switched synchronous vertical deflection circuit. In order to reduce variations of the energy coupled from the horizontal deflection circuit to the... | 09/26/1978 |
| 4107575 | Frequency-selective loss technique for oscillation prevention in traveling-wave tubes Backward-wave oscillations in a helix or helix-derived traveling-wave tube re prevented by dimensioning the conductive shell surrounding the helix so that the backward-wave space harmonic of the slow-wave interaction circuit has a cutoff frequency in the v... | 08/15/1978 |
| 4096415 | Switched vertical deflection circuit In a switched vertical deflection circuit, two SCR switches couple horizontal retrace pulses to a capacitor. A modulator couples pulse width modulated gating pulses to the SCR's. The SCR's couple to the capacitor successively smaller portions of the horiz... | 06/20/1978 |
| 4081722 | Signal processor for switched vertical deflection system A modulator stage of a switched vertical deflection amplifier produces pulse width modulated gating signals obtained by modulating horizontal rate pulses including a ramp portion at a vertical deflection rate. The gating signals control switches coupled b... | 03/28/1978 |
| 4016454 | Three large signal deflection system The deflection system includes a first pair of deflection coils connected in series for moving the beam of a cathode ray tube in a horizontal direction and a second pair of deflection coils having a choke connected in series therebetween with a first capa... | 04/05/1977 |
| 3988637 | Circuit arrangement for generating in a picture display device a sawtooth current of line frequency having an amplitude varying at field frequency A circuit arrangement for generating in a color picture display device a sawtooth correction current of line frequency flowing through the line deflection coils and having an amplitude varying at field frequency for the purpose of obtaining a better color... | 10/26/1976 |
| 3986077 | Vertical deflection circuit In a vertical deflection circuit for use in a television receiver or the like comprising a vertical oscillation circuit, a saw-tooth wave voltage generating circuit connected to the vertical oscillation circuit and a vertical deflection output circuit to ... | 10/12/1976 |
