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1. 发明专利

GB627942A Improvements in and relating to electric pulse signalling systems 未知
公开(公告)号：GB627942A
公开(公告)日：1949-08-18
申请号：GB2414447
申请日：1947-09-01
申请人： EDWARD COLIN CHERRY , NARAYANA RAO V
IPC分类号： H03K9/00
摘要： 627,942. Pulse modulation. CHERRY, E. C., and RAO, V. N. Sept. 1, 1947, No. 24144. [Class 40 (v)] A signal sent by modulation of a series of recurrent pulses is recovered partly by a lowpass filter, and partly by feeding the pulses into one or more circuits tuned to the pulse recurrence frequency or to harmonics thereof, and rectifying the resulting oscillations. The modulated pulse train may be analysed into a signal frequency band A, Fig. 2, and a series of bands B, C ... of double the width of the band A centred on the pulse recurrence frequency f and the harmonics 2f , 3f .... When the received pulses are applied to the grid of the pentode valve V, the signal band A is taken off from the anode resistor R0 by a low-pass filter LOCO, while the bands B, C ... are taken off by band-pass filters L1, C1 ; L2, C2 connected across anode resistors R1, R2. The band-pass filters are associated with rectifiers D1, D2 and condenser-shunted load resistors R1 , R2 . The signal is taken off across the resistors R0 , R1 , R2 in series. The system gives increased signal strength and improves the signal to noise ratio.

2. 发明专利

GB520460A Improvements in or relating to means for generating electrical saw-tooth oscillations 未知
公开(公告)号：GB520460A
公开(公告)日：1940-04-24
申请号：GB3145838
申请日：1938-10-31
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY , ROBERT JAMES CLAYTON
IPC分类号： H03K4/16
摘要： 520,460. Valve generating circuits. GENERAL ELECTRIC CO., Ltd., CHERRY, E. C., and CLAYTON, R. J. Oct. 31, 1938, No. 31458. [Class 40 (v)] In a saw-tooth oscillation generator in which a condenser 3 is charged (or discharged) -at a constant rate through a resistance 7, and is discharged (or charged) abruptly through a thermionic valve 1, the grid circuit of the latter includes a resistance 4 and condenser 5 in parallel, the time constant of which in conjunction with the rate of increase of anode voltage determines the frequency of oscillation, and an inductance 6 coupled to an inductance 2 in series with the condenser 3 in such manner that when the valve begins to conduct the grid voltage is made more positive and thus the discharging (or charging) of the condenser 3 through the valve is expedited. The valve 1 may be a multi-grid valve, synchronizing signals being applied to one of the additional grids. Current through the resistance 7 may be supplied through a pentode or like valve operating at constant current. The voltage derived from the condenser 3 may be amplified for application to the deflecting coils of a cathode-ray tube, and the amplifier may be enclosed in the same envelope as the oscillator, the two valves sharing the same cathode. For example, a triode-hexode may be adapted to serve the two functions. Specification 425,035 is referred to.

3. 发明专利

GB514807A Improvements in apparatus for receiving television and like signals 未知
公开(公告)号：GB514807A
公开(公告)日：1939-11-17
申请号：GB1670738
申请日：1938-06-03
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY , GEORGE WILLIAM EDWARDS , BERNARD JOHN O KANE
IPC分类号： H04N5/10
摘要： 514,807. Television. GENERAL ELECTRIC CO., Ltd., CHERRY, E. C., EDWARDS, G. W., and O'KANE, B. J., June 3, 1938, No. 16707. [Class 40 (iii)] A series-resonant circuit 15, 16, 17 tuned to the line frequency is shunted across the output of the frequency-selective means 7 for selecting the framing frequency. A component of twice the line frequency is introduced in the output by a condenser 18 connected to a tapping 19 on the anode resistance 6 of the valve 4 for separating the synchronising signals from the image signals. The elements 15, 16, 17 are adjusted so that they also act as a parallel tuned circuit at twice the line frequency.

4. 发明专利

GB516152A Improvements in electrical apparatus comprising at least one thermionic valve and adapted to operate at high frequencies 未知
公开(公告)号：GB516152A
公开(公告)日：1939-12-22
申请号：GB1991538
申请日：1938-07-05
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY , GEORGE WILLIAM EDWARDS
IPC分类号： H03L1/02
摘要： 516,152. Valve circuits. GENERAL ELECTRIC CO., Ltd., CHERRY, E. C., and EDWARDS, G. W. July 5, 1938, No. 19915. Drawing to Specification. [Class 40 (v)] Variations of temperature produced by cathode heating during the period of heating up the apparatus change the inter-electrode capacities of valves, which change may detune considerably associated high frequency tuned circuits. This detuning may be neutralized by a condenser with a temperature coefficient opposite sign, connected in parallel with the tuning condenser. The condenser may comprise part of a " dummy " valve, or be so arranged as to be heated by the valve. Specifications 515,872 and 474,522 are referred to.

5. 发明专利

GB426364A Improvements in electric circuits comprising a gasfilled triode, or the like 未知
公开(公告)号：GB426364A
公开(公告)日：1935-04-02
申请号：GB5234
申请日：1934-01-01
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY , LESLIE IVAN FARREN
IPC分类号： H01J17/04
摘要： 426,364. Valve circuits. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, CHERRY, E. C., and FARREN, L. I., c/o General Electric Co., Wembley, Middlesex. Jan. 1, 1934, No. 52. [Class 40 (v)] A valve circuit, including a gasfilled triode, of the type in which resistance W in the anode circuit is so large that the anode current can be stopped and started by variation of grid potential, comprises a rectifier D so connected in the grid circuit as to oppose flow of current in the direction characteristic of a positive grid while permitting current in the opposite sense. The rectifier, which is preferably of the dry-plate type, is shunted by a resistance Rg of about one megohm. By this means, the anode current, once started, attains its full value and does not increase with further increase in grid potential, while the difference between the grid potentials required to initiate and stop the discharge is kept small. Specification 374,752 is referred to.

6. 发明专利

GB576469A Improvements in electrical square-wave generators 未知
公开(公告)号：GB576469A
公开(公告)日：1946-04-05
申请号：GB1362641
申请日：1941-10-23
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY
IPC分类号： H03K5/13
摘要： 576,469. Impulse generators. GENERAL ELECTRIC CO., Ltd., and CHERRY, E. C. Oct. 23, 1941, No. 13626. [Class 40 (v)] In a circuit for producing a square wave, a controllable time after the receipt of an impulse, the impulse triggers a first transitron to produce a square wave, the wave being differentiated to produce a pulse, coincident with the termination of the square wave, to trigger a second transitron to produce a second square wave. By varying the value of the coupling condenser between the screen and suppressor grids or the resistance in the suppressor grid lead, the duration of either square wave may be adjusted. A positive impulse,. applied to the control grid of transitron connected valve V1 causes it to generate a negative-going square wave on the screen grid, the duration being controlled by a variable resistance R2. The square wave is differentiated by the short time constant circuit C2, R4 to produce a positive pulse coincident with the termination of the square wave, the negative pulse formed at the commencement being suppressed by diode V3. The positive pulse triggers a second transitron V2 to produce the second square wave, the duration being varied by resistance R2 . The second square wave may be differentiated in a similar manner to the first, the resulting pulses triggering further squarewave generators. Specification 511,733 is referred to.

7. 发明专利

GB515872A Improvements in thermionic valves 未知
公开(公告)号：GB515872A
公开(公告)日：1939-12-15
申请号：GB1991438
申请日：1938-07-05
申请人： MI O VALVE CO LTD , EDWARD COLIN CHERRY , GEORGE WILLIAM EDWARDS
IPC分类号： H01J19/02
摘要： 515,872. Thermionic valves ; electric condensers. M-O VALVE CO., Ltd., CHERRY, E. C., and EDWARDS, G. W. July 5, 1938, No. 19914. [Class 39 (i)] [Also in Group XXXVI] Thermionic valves, particularly for high frequency operation, adapted to form part of a tuned circuit, comprise condensers having a dielectric of which the dielectric constant varies with temperature in such a manner that it compensates the variation of the capacity of the valve due to changes of temperature during operation. The dielectric is disposed between at least one pair of electrodes or leads and, in one form, consists of a disc with holes through which the leads pass arranged at the inner end of the pinch. Alternatively the dielectric may be in the form of tubes slipped over the leads and secured in position by stops or by cementing or fusing it to the pinch. A material suitable for use with a glass envelope and pinch is stated to be the ceramic material known under the trade names Condensa N and Tempa N.

8. 发明专利

GB576103A Improvements in automatic volume control devices in radio pulse receivers 未知
公开(公告)号：GB576103A
公开(公告)日：1946-03-19
申请号：GB1805042
申请日：1942-12-18
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY
IPC分类号： H03G3/22
摘要： 576,103. Automatic gain control. GENERAL ELECTRIC CO., Ltd., and CHERRY, E. C. Dec. 18, 1942, No. 18050. [Class 40 (v)] In a wireless receiver designed for signals consisting of short pulses of carrier-frequency energy, automatic gain control is effected by use of part of a tuning indicator tube of the cathode-ray type as a D.C. amplifier of the rectified potential from a diode detector. The diode V4 is fed with pulses from an anode bend rectifier valve V2, via condenser C3 and resistance R4. The D.C. potential appearing across the diode load, comprising resistance R and capacitance C, is applied between grid and cathode of the tuning indicator tube V3. The gain control voltage for the early stages of the receiver is taken off across a resistance R2 connected in the cathode lead of the tube V3, a suitable standing bias being maintained by connecting the lower end of the resistance R2 to a source of negative potential. The ganged switches S1, S2 are arranged to be normally open, so that AVC is operative ; on closing the switches, the AVC is put out of action and the tuning indicator target T connected in circuit.

9. 发明专利

GB522443A Improvements in apparatus for generating electric currents of saw-tooth wave forms 未知
公开(公告)号：GB522443A
公开(公告)日：1940-06-18
申请号：GB3584338
申请日：1938-12-08
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY , ROBERT JAMES CLAYTON
IPC分类号： H03K4/34
摘要： 522,443. Valve generating circuits. GENERAL ELECTRIC CO., Ltd., CHERRY, E. C., and CLAYTON, R. J. Dec. 8, 1938, No. 35843. [Class 40 (v)] In a circuit for producing saw tooth currents by back coupling between anode and a grid of a valve, the valve is provided with an additional grid nearer to the cathode to which synchronizing signals are applied and the mean potential of the oscillator grid is negative and the grid has fed to it a voltage substantially greater than that generated in the output circuit. The fundamental circuit is indicated in Fig. 2, the anode 4 being coupled through transformer 5, 7 to grid 10, while synchronizing signals are applied to grid 3. To prevent unnecessary drain on the supply, separate paths to windings 5 and 7 of the coupling transformer are provided as indicated in Figs. 3 and 4 (not shown) since amplitude depends on the potential at A and frequency on potential at B. A single step-down transformer, Fig. 3 (not shown) may be provided, but the windings may be divided or two step-down transformers may be provided, Fig. 4 (not shown). Two secondaries on a single transformer as shown in Fig. 5 and the secondaries of Fig. 5 may be replaced by a single tapped winding, Fig. 6 (not shown). Specification 465,344 is referred to. Reference has been directed by the Comptroller to Specification 465,344.

10. 发明专利

GB507368A Improvements in electric amplifier and cathode ray tube circuits 未知
公开(公告)号：GB507368A
公开(公告)日：1939-06-14
申请号：GB1257338
申请日：1938-04-27
申请人： GEN ELECTRIC CO LTD , EDWARD COLIN CHERRY , GEORGE WILLIAM EDWARDS , DENNIS CLARK ESPLEY
IPC分类号： H03F1/50
摘要： 507,368. Circuits for thermionic valves and cathode-ray tubes. GENERAL ELECTRIC CO., Ltd., CHERRY, E. C., EDWARDS, G. W., and ESPLEY, D. C. April 27, 1938, No. 12573. [Classes 40 (iii) and 40 (v)] An amplifier or cathoderay tube having a reactive impedance Z4 in series with the cathode has the response rendered independent of frequency by applying the input voltage to a potentiometer which includes at least one element of the form kZ4 where k is independent of frequency. The invention is contrasted with that of Specifications 459,251, 478,815, and 506,946, in which the same object is achieved by choosing the anode impedance and is particularly applicable to discharge devices such as cathode-ray tubes which have a control electrode but do not include an impedance in the output circuit across which an output voltage is derived. The Specification gives a mathematical analysis and formulae that when satisfied give the required independence of frequency. The input voltage to the potentiometer network Z1, Z2, Z3 may be the output voltage of a network or amplifier according to Specification 459,251, 478,815, or 506,946, and the impedance of the potentiometer network is large compared with the output impedance of the network or amplifier.

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