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1. 发明专利

GB981880A Apparatus and method for sorting flat articles 未知
公开(公告)号：GB981880A
公开(公告)日：1965-01-27
申请号：GB472062
申请日：1962-02-07
申请人： MAURICE MOISE LEVY
IPC分类号： B07C3/08
摘要： 981,880. Endless conveyers. M. M. LEVY. Feb. 7, 1962 [Feb. 8, 1961], No. 4720/62. Heading B8A. [Also in Division G4] In a letter-sorting machine, letters are deposited in accumulators in accordance with code designations on the letters, and after sorting on the first digit of the code, the batches of letters formed in the accumulators are automatically transferred in turn to a stacker ready for sorting on the next digit of the code. The letters 4, Fig. 4, may be carried by traps 6 on an endless conveyer and are deposited in the selected accumulator by the action of cams which are moved to an operative position by energizing a solenoid at the appropriate accumulators. A first cam causes trap 6 to project between fingers 31 so that the letter 4 passes between fingers 31 and spring strips 34, any letters already in the accumulator being pushed back by a resilient member 6b on the trap. The letter then abuts against bifurcated arms 33, and at the same time a second cam causes the jaws of trap 6 to open and release the letter. In this embodiment the accumulators are also carried on an endless chain conveyer, and after the first sorting operation the accumulators are moved by this conveyer past a stacking device, Fig. 5. As each batch of letters enters the stacker, the letters abut against arms 38 and are thus retained in the stacker as the accumulator moves on. Letters already in the stacker may be pushed back by ends 35 of fingers 31, as shown, or a reciprocating lever may be employed. In an alternative embodiment, the letters are dropped into accumulators 173, Fig. 16, and the batches are transferred in turn to a stacker by moving the stacker past the accumulators, an arm 174b on the stacker causing flaps 174 to open as the stacker passes the successive accumulators. The stacker comprises a platform 187 which is driven by a motor 193 under control of a photo-cell 192 so that the batches of letters each fall the same distance on to platform 187. In another embodiment the bottom of each accumulator is formed by an endless conveyer 140, Fig. 11, which comprises three spaced belts carrying plates 143. The stacker comprises a vertically driven pair of bars 145 carrying arms 144 which collect each batch of letters in turn from conveyer 140. In a similar arrangement plates 143 are replaced by wedges which form sloping floors for the accumulators. Another type of accumulator is shown in Fig. 15. Each accumulator is divided into several compartments by flaps 160, corresponding flaps in each accumulator being connected by arms 164. By appropriate actuation of arms 164, letters may be sorted into batches in any one of the accumulator compartments, and similarly, one or more batches may be dropped on to conveyer 170 as desired. Specifications 932,479 and 981,879 are referred to.

2. 发明专利

GB652882A Improvements in and relating to pulse signalling systems 未知
公开(公告)号：GB652882A
公开(公告)日：1951-05-02
申请号：GB230048
申请日：1948-08-05
申请人： GEN ELECTRIC CO LTD , MAURICE MOISE LEVY
IPC分类号： H04B14/02
摘要： 652,882. Pulse discriminating circuits; pulse modulation systems. GENERAL ELECTRIC CO., Ltd., and LEVY, M. M. Aug. 5, 1949, No. 2300/48. [Classes 40 (v) and 40 (vi)] In a pulse signalling system in which intelligence is conveyed by recurring time modulated pairs of pulses of constant time spacing the transmitter, comprises means for producing from the modulated carrier, two corresponding side - bands which are spaced apart and which are used as the transmitted signal. Fig. 4 shows a receiver circuit for such a system in which the received signal has a waveshape as shown in Fig. 2. The positive-going input pulses at terminal T1 are combined with a delayed signal of the same polarity from the delay network N1 which has an overall delay equal to the spacing between successive peaks of the incoming signal, to produce a peak of enhanced amplitude, Fig. 5, curve K. This voltage is inverted and delayed by the shorted delay line N2 to produce a waveshape as shown at Fig. 5, curve L. The resultant as shown at Fig. 5, curve M, is applied to valve V2 which allows only signals above the level shown at C3 in Fig. 5 to pass and shockexcite the tuned circuit LC. The steep trailing edge T (Fig. 5) produces a larger and steeper pulse from the circuit LC than any other of the pulses and may be readily selected, and its intelligence extracted in a demodulator circuit.

3. 发明专利

GB652872A Improvements in and relating to the generation of pulse-modulated oscillations 未知
公开(公告)号：GB652872A
公开(公告)日：1951-05-02
申请号：GB2010147
申请日：1947-07-25
申请人： GEN ELECTRIC CO LTD , MAURICE MOISE LEVY
IPC分类号： H03K7/00
摘要： 652,872. High-frequency electric filters. GENERAL ELECTRIC CO., Ltd., and LEVY, M. M. July 25, 1947, No. 20101. [Class 40 (viii)] [Also in Group XL (c)] Following modulation of a carrier, side-band components are selected extending from the carrier over a desired band, components outside this band being excluded. The selecting means may also exclude or substantially exclude parts of the desired band on either side of and adjacent the carrier frequency. The selecting means may be a band-pass filter which should have a constant input resistance over the frequency band employed to prevent reflection of the unwanted energy back into the carrier generator. The filter may be composed of one band-pass filter feeding the aerial and one bandstop filter terminated in a dummy load. The impedance of the two filters in parallel is constant if the terminating half-sections are m-derived and are so designed that m=0.6, and for the same load resistance and if the usual shunting impedances at the inputs of both filters are omitted. In an arrangement for transmitting a pulse-modulated carrier, a magnetron radio-frequency pulse generator 15 is connected to a hybrid wave-guide junction 16. Energy enters at Y and appears in phase at V and X, no energy passing directly from Y to Z. The energy at V passes to a band-stop filter 17 terminated in a dummy load 18 while the energy at X passes to a second band-stop filter 19 terminated in a dummy load 20. The connection from V to 17 is longer by #/4 than the connection from X to 19 so that energy in the desired band reaches V after reflection at 17 with a phase displacement of its voltage of #/2 relative to that reaching X after reflection from 19. These energies combine with their voltages in phase and pass to the aerial 21.

4. 发明专利

GB652408A Improvements in and relating to circuits for electric pulses 未知
公开(公告)号：GB652408A
公开(公告)日：1951-04-25
申请号：GB434150
申请日：1946-07-31
申请人： GEN ELECTRIC CO LTD , MAURICE MOISE LEVY
IPC分类号： H03K3/543 , H03K5/07
摘要： 652,408. Pulse generating circuits. GENERAL ELECTRIC CO., Ltd., and LEVY, M. M. July 31, 1946, No. 4341/50. Divided out of 652,353. [Class 40 (vi)] Two or more pulses, applied to a tuned circuit cause a damped wave to be generated, the pulse width and separation and the resonant frequency of the circuit being such that the shock excitation wave produced by the pulse or pulses after the first reduces the amplitude of a peak in one sense which occurs, after the first peak of the damped wave. The output pulse is obtained by clipping the resulting waveform. A pulse pair, Fig. 11 (a) applied to valve 10, Fig. 10, causes wave trains (b) and (c) due to the respective pulses to occur across the inductor L tuned by its stray capacity. The next waveform (d) occurring at the grid of cathode follower 39 shows a peak 25 with succeeding positive peaks substantially suppressed.

5. 发明专利

GB652397A Improvements in and relating to multi-channel pulse signalling systems 未知
公开(公告)号：GB652397A
公开(公告)日：1951-04-25
申请号：GB788248
申请日：1948-03-16
申请人： GEN ELECTRIC CO LTD , MAURICE MOISE LEVY
IPC分类号： H04J3/04
摘要： 652,397. Cathode-ray tubes. GENERAL ELECTRIC CO., Ltd., and LEVY, M. M. March 16, 1948, No. 7882. [Class 39 (i)] [Also in Group XL (c)] In a multi-channel cathode-ray tube pulse duration or time modulator, in which the beam sweeps over a plurality of slotted or strip electrodes to generate pulses, the time of occurrence of the leading and/or trailing edge of which is determined by the edges of the slots or strips, beam-deflecting means reduce, preferably to zero, the component of beam movement parallel to the line joining the strip or slot centres when the beam is in their neighbourhood. In one embodiment, Figs. 1 and 2, pulses are produced when the beam traverses slots S 1 ... S 6' in a plate P behind which is a common target electrode C. The voltage wave (c), Fig. 3, is applied to the vertical deflecting electrode M and the wave (f), which is the sum of waves (b) and (c) is fed to the horizontal deflecting electrodes E 1' E 2 . The beam thus traces out the broken line track T. The tube is arranged to handle the odd-numbered channels of a 12-channel system and the signals from these channels are applied to the individual vertical deflecting electrodes M1 ... M6. The effect of the channel signals is to modulate the time at which the beam crosses the related slot S1 ... S6 and to produce time-modulated interleaved negative channel pulses at the target C. The first channel may be reserved for a synchronizing pulse group provided by three slots S1, S1 1 , S1 11 ', and unmodulated. The beam is suppressed during the return strokes b, c, by a voltage wave (a) applied to the control grid or (e) applied to the cathode. The working strokes of the beam may be lengthened by replacing wave (f) by one produced by the addition of wave (b) and the unsymmetrical saw-tooth wave (d). The wave (c) on electrode M may be modified to the form (h) by the addition thereto of the pulses (g), in order to ensure the production of pulses if over-modulation occurs. Screens G may be provided between the modulating electrodes M1 ... M6 to prevent cross-talk between channels. In a modification two inclined slots are provided for each channel and the signals deflect the beam horizontally so that pairs of pulses modulated in spacing are produced, Fig. 5 (not shown). In another embodiment, Fig. 6, the slots S1 ... S4 are arranged with their lengths perpendicular to the line joining their centres. The voltage wave (f) is applied to electrodes El, E2 as before, but the wave (c) is applied in parallel to horizontally-deflecting electrodes K1 and the channel signals to horizontally deflecting electrodes M1 ... M4. Thus the beam reverses direction in the vicinity of each slot and produces channel pulse pairs modulated in spacing, but single time-modulated pulses may be produced by suppressing the beam during one traversal of each slot. A further embodiment is described, Figs. 7 and 8 (not shown), in which each slot acts as a modulator for a plurality of different channels in succession as in Specification 652,357. In all the arrangements the slots may be replaced by strip electrodes. For generating durationmodulated pulses, the slots or strips may be of greater width, the leading or trailing edge of the pulse being determined by their edges and the other edge being determined by switching off the beam at regularly recurring instants by black-out pulses.

6. 发明专利

GB650836A Improvements in and relating to cathode ray tube circuits 未知
公开(公告)号：GB650836A
公开(公告)日：1951-03-07
申请号：GB3246947
申请日：1947-12-09
申请人： GEN ELECTRIC CO LTD , MAURICE MOISE LEVY
IPC分类号： H01J31/02
摘要： 650,836. Cathode-ray tubes. GENERAL ELECTRIC CO., Ltd., and LEVY, M. M. Dec. 9, 1947, No. 32469. [Class 39 (i)] In a cathode-ray tube circuit having an electrode adapted to collect electrons at a reduced rate when the beam is inoperative, a voltage dependent upon the variation of the electron current to the electrode is applied to an intensity control electrode whereby the electron current in the beam is reduced when it is inoperative. In a multi-channel pulse signalling system, the beam is deflected between a conical electrode 14 and a series of deflecting plates S, each of which is connected to a signal channel so that the beam is radially deflected by each signal across a corresponding inclined slot in the plate 11 to produce a time-modulated electron pulse at the collector 12. The beam current is adapted to be increased when it passes through a slot in the plate 11 by suitable back-coupling between the collector 12, which produces negative pulses, and the control grid or cathode through the amplifier 13. The modulated signals are also fed directly or through the amplifier 13, or a part thereof, to the aerial 16 through the amplifier and radio-frequency modulator 15. The feed-back might be drawn from the plate 11 or from a further electrode adapted to collect secondary electrons from the plate 11, electrode 12 or the glass wall or a mica plate. The slotted plate 11 may be replaced by inclined wires or strips. A wide-band amplifier 13 may be followed by a class C amplifying valve, the anode of which is connected to a tuned circuit so that a suitable voltage peak may be applied to the control grid of the cathode-ray tube.

7. 发明专利

GB619785A Improvements in and relating to multi-channel signalling systems 未知
公开(公告)号：GB619785A
公开(公告)日：1949-03-15
申请号：GB3750146
申请日：1946-12-20
申请人： GEN ELECTRIC CO LTD , MAURICE MOISE LEVY
IPC分类号： H04J3/04
摘要： 619,785. Thermionic distributers. GENERAL ELECTRIC CO., Ltd., and LEVY, M. M. Dec. 20, 1946, No. 37501. [Class 40 (iii)] [Also in Groups XL (a) and XL (c)] In a multi-channel pulse signalling system the different channels are served bv a number of electronic distributers, each having a plurality of control electrodes associated with a corresponding number of channels and a rotating electron beam for routing the signals via common anodes to a distributermodulator which converts the signal voltage variations into pulse-time or pulse - width modulations. As shown in Fig. 1, two 50 kc. sine waves 90 degrees out of phase are produced by a master generator A and selective amplifier B and are applied to the deflecting coils MC and MC2 of a distributer-modulator M, Fig. 3, the deflecting electrodes MD , MD3, MD ... MD of which are connected to distributers D ... D which collect the signals from the different channels C , C3 ... C . The distributer-modulator is provided with an inner electrode ME co-operating with the electrodes MD to deflect the cathode ray radially inwards and outwards over slots MS in a plate MP, thus retarding or accelerating the instant at which a pulse is generated at the anode MA, proportionally to the signal variations applied to the deflecting electrodes. Once in every revolution the cathode beam strikes an electrode MG and generates a pulse stream of 50 kc. which is fed to a multi-vibrator H and selective amplifier J. An output, of two 5 kc. sine waves 90 degrees out of phase, is thereby produced to rotate the cathode beams of the distributers D ... D . Each distributer comprises two anodes DAA and DAB, Fig. 2, a screen grid DS, an elongated cathode DE, and ten control grids DG, the arrangement being such that a beam of electrons extending radially in opposite directions rotates about the cathode. Fig. 1 shows the arrangement for the odd numbered channels C ... C of a 120 channel system, a similar arrangement being provided for the even numbered channels. In operation, the signal voltages present on the control electrodes C , C ... C , are successively picked up by the distributers D . . . D and are applied by means of the anodes DAA , DAB ... to the appropriate electrodes MD ... MD of the distributer modulator. As the cathode beam in the modulator comes under the influence of the electrodes MDl ... MD it is deflected radially and causes modulated pulses at the anode MA. The pulses may be modulated in time or duration according to the type of slot employed in the plate MP, and are fed to an amplifier F and transmitter G. As shown in Fig. 2, each distributer D ... D has a screen grid DS comprising grid portions opposite the control electrodes DG separated by plate portions which serve to intercept stray electrons such as e . Electrons as indicated at e are prevented from causing cross talk by means of screening electrodes DF, of which. alternate ones are connected together. The two sets of electrodes DF are fed with oscillations 180 degrees out of phase, and arranged so that interference from electrodes adjacent the effective electrode is prevented. Radial screens extending towards the cathode may also be provided.

8. 发明专利

GB589126A Improvements in or relating to means for generating rectangular electrical impulses 未知
公开(公告)号：GB589126A
公开(公告)日：1947-06-12
申请号：GB678141
申请日：1941-05-27
申请人： STANDARD TELEPHONES CABLES LTD , MAURICE MOISE LEVY
IPC分类号： H03K12/00
摘要： 589,126. Pulse generating circuits. STANDARD TELEPHONES & CABLES, Ltd., and LEVY, M. M. May 27, 1941, No. 6781. [Class 40 (v)] In a system for generating pulses of short duration and high power from a source of alternating potential, the frequency of the plate supply in any stage of a cascade amplifier is arranged to be an integral submultiple of the frequency of the source. Fig. 1 shows an amplifier of the type described in Specification 582,752 to which the invention may be applied. The source feeds the pentodes PI, P2 through transformer T with voltages displaced slightly from phase opposition by condenser C and limited by resistances RO and diodes D. The combined output is fed to cathode follower V. By using alternating potentials at integral submultiplesof the source to energize the anodes of the valves P1, P2 and V, steeper pulses are obtained. Fig. 6 shows an arrangement for securing increased sharpness in the pulses by the provision of additional stages P3, P4 and P5, P6. In this arrangement transformer T may be fed with frequency 32f and the supply to valves P1, P2, P5, P6 be 16f and to valves P3, P4 be 4f and to valve V be f, where f is the desired frequency of repetition of the impulses.

9. 发明专利

GB584642A Improvements in or relating to arrangements for modulating continuous electric waves 未知
公开(公告)号：GB584642A
公开(公告)日：1947-01-20
申请号：GB121745
申请日：1945-01-15
申请人： STANDARD TELEPHONES CABLES LTD , MAURICE MOISE LEVY , EDWARD ARTHUR RATTUE
IPC分类号： H03K3/78 , H03K7/00 , H04L27/04
摘要： 584,642. Valve generating and modulating circuits. STANDARD TELEPHONES & CABLES, Ltd., LEVY, M. M., and RATTUE, E. A. Jan. 15, 1945, No. 1217. [Class 40 (v)] Tone-modulated carrier waves are generated by means of a multi-vibrator arranged to generate regularly repeated pulses, and to one valve of which an oscillatory circuit is so connected that the carrier waves produced are modulated with the pulses. The valves 1, 2 operate as a multi-vibrator by the crossconnection of the electrodes 1, 7 and 3, 9, through the condensers 10, 11 and resistances 13, 15 and 14, 16 respectively. The valve 1 is provided with a biassing resistance 29 and condenser 30, and its grid 3 and anode 6 are connected in the oscillator circuit comprising the coil 20 and condenser 21 and series-connected piezo-electric crystal 22. H.F. oscillations are blocked from the multi-vibrator circuit by the choke 12 and the condensers 27, 28, and from the H.T. line by means of the choke 23 and condenser 26. The width of the modulating pulses may be adjusted by suitable selection of the coupling elements 10, 13, 15 and 11, 14, 16 respectively. The generator is keyed by means of the key 17 in the H.T. positive line, which is provided with a keyclick filter 19.

10. 发明专利

GB581968A Improvements in or relating to the generation of electrical impulses 未知
公开(公告)号：GB581968A
公开(公告)日：1946-10-31
申请号：GB450641
申请日：1941-04-04
申请人： STANDARD TELEPHONES CABLES LTD , MAURICE MOISE LEVY , LESLIE ERNEST WEAVER
IPC分类号： H03K5/06
摘要： 581,968. Valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd., LEVY, M. M., and WEAVER, L. E. April 4, 1941, No. 4506. [Class 40 (v)] An arrangement for producing shortened electrical pulses from original pulses comprises a thermionic valve and a delay network whose input terminals are connected in series with the cathode circuit of the valve and whose output terminals are left unconnected, the original pulses being applied to the control grid of the valve and the shortened pulses being taken from the plate circuit. In the form shown in Fig. 7, a time delay network 1 is connected across the terminals x1, x2 of an impedance Z0 in the cathode circuit of a valve 2, to the grid of which an impulse a of steep front is applied. This causes a corresponding impulse to be applied to network 1 which is reflected back as an impulse b which is of the same sign and slightly delayed since terminals y1, y2 are open-circuited. The a and b impulses are combined at x1, x2 and the output taken at Z1, Z2 through a blocking condenser 10 comprises an impulse c of very steep front and of very short duration. Fig. 8 shows an arrangement in which a valve 2 has in its anode circuit an anti-resonant circuit 11, 12 critically damped by an impedance Z0 and delay network 1 with its output terminals y1, y2 shortcircuited. A second delay network 1 with open-circuited output terminals is connected across an impedance Z 0 in the cathode lead. The circuit without the delay networks would produce steep-fronted pulses from a squaretoppod input a1. Network 11 increases the steepness of the pulse by effecting a sharp cutoff of anode current as in Fig. 7, while network 1 further narrows the pulse by combination with a delayed reflected pulse of reversed sign. Specifications 514,271 and 528,310 are referred to.

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