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1. 发明专利

GB528345A Improvements in or relating to electrical frequency wobbling arrangements 未知
公开(公告)号：GB528345A
公开(公告)日：1940-10-28
申请号：GB1336939
申请日：1939-05-04
申请人： MARCONI WIRELESS TELEGRAPH CO , BERTRAM JOHN WITT
IPC分类号： G01S1/02 , H03C3/28 , H03C7/02
摘要： 528,345. Radio-altimeters. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and WITT, B. J. May 4, 1939, No. 13369. [Class 37] [Also in Group XL] A frequency-wobbling system, designed for use with an altimeter of the radio reflection type, comprises a pair of Lecher wires or the like la, Fig. 2, with arcuate extensions ba which form the fixed plates of condensers, the moving plates comprising a series of radial arms r1, r2 &c. rotating with a hub H. The arm r1 enters between the Lecher wires at a point A which is a nodal point for the frequency at which the system is then resonant, and as the arm r1 rises the frequency falls linearly until the arm emerges at the point B. The frequency then rises suddenly to its original value, and the next arm r6 enters at the point A. Fig. 3 shows, in transverse section, an arrangement in which the Lecher strips ba, bg are each of triple form, and the moving vanes r2a, r2g embrace the triple strips. Each of the moving vanes is narrow in a circumferential direction. Height of an aircraft is ascertained by mounting the oscillator on the craft and measuring the pitch of the interference note caused by the emission wave and the wave received after reflection by the earth.

2. 发明专利

GB516149A Improvements in or relating to navigation aiding radio transmitters 未知
公开(公告)号：GB516149A
公开(公告)日：1939-12-22
申请号：GB1848038
申请日：1938-06-21
申请人： MARCONI WIRELESS TELEGRAPH CO , BERTRAM JOHN WITT
IPC分类号： G01S1/02
摘要： 516,149. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and WITT, B. J. June 21, 1938, No. 18480. [Class 40 (v)] The two aerials of a navigational transmitter of the overlapping-beam type are alternately coupled to and decoupled from the transmitter by a rotating condenser having at least two stators, the vanes of which are so shaped and disposed as to produce complementary signals, say the Morse letters E and T in sequence. As shown in Fig. 1, the condenser is inserted in the output feed-line 5, 6 from the amplifying valves 1, 2 of the H.F. generator, and passes power from the feed-line to the transmitting aerials 15, 17 in the sequence stated. The rotors 8,9 are mounted on a common rotating shaft 5, Fig. 2, and engage with the stators 10, 11 for " dot " and " dash " periods respectively. Discs 12 may co-operate with a third set of stator vanes 13 to provide a constant coupling factor between the rotary blades 8, 9 and the feeder 5, 6, the inner conductor of which is then connected to the stator 13 instead of to the condenser shaft. Series inductances 14, 16 counteract undesired capacity effects introduced by the coupling condenser.

3. 发明专利

GB335526A Improvements in or relating to electrical inductances and capacities 未知
公开(公告)号：GB335526A
公开(公告)日：1930-09-23
申请号：GB1598729
申请日：1929-05-23
申请人： CHARLES SAMUEL FRANKLIN , BERTRAM JOHN WITT
IPC分类号： H01G4/258
摘要： 335,526. Franklin, C. S., and Witt, B. J. May 23, 1929. Condensers.-The oscillation circuit of a wavemeter or high-frequency generator has its condenser and/or coil so constructed that the capacity or inductance or their product remains constant in spite of temperature changes. Figs. 1 and 2 show one construction of oscillatory unit, and Fig. 3 shows its arrangement in a valve generator circuit. A cylindrical outer casing A supports a former B for the coil C at its closed end. The other end of the former B carries the fixed element D of a variable condenser, having sector-shaped electrodes D', D projecting from its outer surface. The movable electrode E has inwardly-projecting sectors E , E , and capacity is varied by rotating the electrode E. The external connections L, M are made to arc-shaped plates X, Y which are spaced from the member D to form small capacities. An axial rod G carries an electrode H which is spaced from the end wall K of the member D, thus forming a capacity in parallel with the main condenser D. E. When the temperature rises, the increased capacity between D and E is compensated by a diminution between H and K, owing to the different expansion of the material of which the parts B, G, are composed. In order that the compensation may be effective throughout the tuning-range, the member H, K may be provided with arcuate extensions, and the rod G rotated with the movable electrode E. The casing A is heat-insulated so that temperature changes may be slow and uniform throughout. Parallel plate condensers may have their plate material and their spacing material so chosen that when the plates increase in area their spacing is suitably increased. When concentric cylinders are employed, the outer one is of material whose coefficient of expansion exceeds the inner.

4. 发明专利

GB505910A Improvements in or relating to navigation aiding radio transmitting installations 未知
公开(公告)号：GB505910A
公开(公告)日：1939-05-18
申请号：GB3176437
申请日：1937-11-18
申请人： MARCONI WIRELESS TELEGRAPH CO , JOHN GLOVER ROBB , JOHN MEGARRY FURNIVAL , BERTRAM JOHN WITT
IPC分类号： G01S1/02
摘要： 505,910. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., ROBB, J. G., FURNIVAL, J. M., and WITT, B. J. Nov. 18, 1937, No. 31764. [Class 40 (v)] Relates to means for preventing the production of "false" guiding-lines due to the presence of subsidiary lobes, such as l1, l2, l3, Fig. 1, in the two main beams of an equisignal navigational system. According to the invention, the subsidiary lobes of each main beam are segregated by means of a reflecting array so that all these carrying say the " dot " signal fall to one side only of the main guiding line, whilst those carrying the " dash signal are thrown to the opposite side. In this way, the dots and dashes of the auxiliary lobes cannot merge to give a false equi-signal indication to the side or rear of the main beam. As shown in Fig. 3, each of the two main beams is produced by a series-phase aerial array A1, A2 of the kind described in Specification 403,949, and a central line of half-wave reflectors R is arranged to segregate the auxiliary lobes as described. The reflectors R also serve to " sharpen " the main guiding-line.

5. 发明专利

GB502972A Improvements in directional aerial systems 未知
公开(公告)号：GB502972A
公开(公告)日：1939-03-28
申请号：GB2628237
申请日：1937-09-28
申请人： MARCONI WIRELESS TELEGRAPH CO , JOHN MEGARRY FURNIVAL , BERTRAM JOHN WITT , CHRISTOPHER SYDNEY COCKERELL
IPC分类号： G01S1/02
摘要： 502,972. Directive wireless systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., FURNIVAL, J. M., WITT, B. J., and COCKERELL, C. S. Sept. 28, 1937, No. 26282. [Class 40 (v)] In an equi-signal radio beacon comprising a plurality of aerials, the radiation of any horizontally-polarized component along the equisignal line is prevented by arranging the aerials parallel to this line. This eliminates the production of false equi-signal indications at the receiver due to the horizontally-polarized components of the transmitted radiation being -picked up by horizontal components of the receiving aerial. In Fig. 1, the equi-signal line E is produced by the two aerials A, A and a horizontal component is radiated from the horizontal portions ab, a b , cd ... e f . This component is eliminated in Fig. 2 by arranging the aerials A1, A2, A1 , A2 parallel to the equi-signal line E, and the overlapping characteristics are obtained by setting back the aerials A1, A1 relative to the aerials A2, A2 . In a modification comprising three aerials parallel to the equi-signal line, the centre aerial is continuously energized and the two outer aerials, which are set back relative to the centre aerial, are energized alternately in dot-dash sequence. Alternatively, two directly - fed parallel aerials may be used, "slewing" of the beams being effected by suitable phase adjustment.

6. 发明专利

GB369575A Improvements in or relating to thermionic oscillation generators 未知
公开(公告)号：GB369575A
公开(公告)日：1932-03-21
申请号：GB3845630
申请日：1930-12-20
申请人： MARCONI WIRELESS TELEGRAPH CO , BERTRAM JOHN WITT , CHARLES SAMUEL FRANKLIN
IPC分类号： H03B5/10
摘要： 369,575. Valve generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London, WITT, B. J., 19, Hawthorne Avenue, Eastcote, Middlesex, and FRANKLIN, C. S., Marconi House, Strand, London. Dec. 20, 1930, No. 38456. [Class 40 (v).] A short-wave oscillation generator comprises a master frequency - determining circuit LC coupled to the grid of an amplifier valve V1, and a second amplifier valve V2 having its grid coupled to the plate of the valve V1, and its plate coupled back to the master circuit LC. The output is taken from the V1 to the grid of a coupling-valve SV of the screen-grid type, the plate circuit of which includes a circuit L1, C1 tuned to the master frequency or to a harmonic thereof. Grid resistances GR1, GR2 and plate resistances AR1, AR2 are provided for the valves V1, V2 respectively. A resistance SR between the grid of valve V2 and its - coupling condenser prevents unwanted os. cillations. The master circuit LC, the coupling condensers X, Y and the screen E are preferably embodied in a unit constructed as described in Specification 335,526, [Class 40 (v), Wireless signalling &c.].

7. 发明专利

GB471129A Improvements in or relating to electric calbes 未知
公开(公告)号：GB471129A
公开(公告)日：1937-08-27
申请号：GB593436
申请日：1936-02-27
申请人： MARCONI WIRELESS TELEGRAPH CO , BERTRAM JOHN WITT
IPC分类号： H01B11/18
摘要： 471,129. Cables. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and WITT, B. J. Feb. 27, 1936, No. 5934. [Class 36] A high-frequency cable comprises a conductor 2 supported from an outer coaxial conductor 1 by spaced metal rods 3 which extend diametrically across the cable and through holes 4, 5 in the outer conductor, the ends of the rods carrying nuts 8, 9 which bear on insulators 6, 7 seated in the holes 4, 5. The holes 4, 5 are of such a size that they increase in inductance of the outer conductor at each supporting point by such an extent as to counterbalance the increase in capacity due to the support, so that the ratio of inductance to capacity is maintained uniform along the cable. Successive supporting rods may be arranged at rightangles. Specification 464,825 is.referred to.

8. 发明专利

GB444111A Improvements in or relating to directional radio receiving apparatus for use for navigation purposes 未知
公开(公告)号：GB444111A
公开(公告)日：1936-03-13
申请号：GB2630934
申请日：1934-09-13
申请人： MARCONI WIRELESS TELEGRAPH CO , BERTRAM JOHN WITT
IPC分类号： G01S3/14
摘要： 444,111. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London, and WITT, B. J., 6, Pebworth Road, Harrow, Middlesex. Sept. 13, 1934, No. 26309. Drawings to Specification. [Class 40 (v)] A directional receiving system for navigation purposes comprises a pair of aerials so spaced in regard to the working wavelength that when the signals received thereon are combined in opposition, preferably in a visual indicator, the resultant is zero if the moving craft is pointed in the direction of the incoming signals, the screening of the two aerials being dissimilar in any other direction to prevent the obtaining of other zero indications. The aerials are preferably positioned in a line at right angles to the direction in which the vessel is pointed, and on an aircraft are preferably spaced apart by the span of the wings being positioned on the forward tips thereof. The screening of the craft itself may prevent a zero indication except when it is correctly directed but this may be supplemented by additional screening comprising half wavelength conductors positioned between the aerials.

9. 发明专利

GB617177A Improvements in or relating to radar installations 未知
公开(公告)号：GB617177A
公开(公告)日：1949-02-02
申请号：GB895546
申请日：1946-03-22
申请人： MARCONI WIRELESS TELEGRAPH CO , BERTRAM JOHN WITT
IPC分类号： G01S1/02
摘要： 617,177. Radiolocation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and WITT. B. J. March 22, 1946, No. 8955. [Class 40 (vii)] In a radar system an automatically actuated warning device is operated upon the reception of signals from targets at less than a predetermined range. In the application of the invention to a ship-borne pulse system employing continuous scanning with a P.P.I. indicator, the recurrence frequency sine wave fed via transformer 1 and phasing circuit 2 is squared by valve V1, inverted by valve V2 and differentiated by circuit 5, 6 to produce at the anode of valve V3 a positive gating pulse which commences immediately after the receipt of the ground wave and is of duration controlled by resistance 6. These pulses are fed through condenser 7 to the suppressor grid of the gate valve V4, the control grid of which receives the video signals from the radar receiver over line 10. Signals received during the gated period are fed through condenser 11 and diode V5 to charge up condenser 12. When the charge on condenser 12 reaches a predetermined value the control valve V6 is cut off, releasing relay 13 and causing the alarm device to be operated. Valve V7 which is normally non-conducting is arranged to be made conducting to discharge condenser 12, by the cam-operated contacts 14 once per revolution of the aerial system. Specification 588,715 is referred to.

10. 发明专利

GB505913A Improvements in or relating to radio direction finding apparatus 未知
公开(公告)号：GB505913A
公开(公告)日：1939-05-18
申请号：GB3176737
申请日：1937-11-18
申请人： MARCONI WIRELESS TELEGRAPH CO , JOHN MEGARRY FURNIVAL , BERTRAM JOHN WITT
IPC分类号： G01S1/68 , G05D1/12
摘要： 505,913. Directive wireless signalling. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., FURNIVAL, J. M., and WITT, B. J. Nov. 18, 1937, No. 31767. [Class 40 (v)] A course is steered by maintaining at constant strength the signals picked up on a frame aerial which is oriented at a given angle to a beacon station whose geographical position is known. If the plane of the aerial is at right-angles to the fore-and-aft line of the craft, and signals are kept at a minimum, the track followed (without drift) will be the " homing " course, say from the point A to the transmitter T. If however the plane of the frame is parallel to the fore-and-aft, line, and the signal strength is kept constant, the track followed will be a circle with T as a centre. For intermediate angles of inclination to the fore and-aft line, the tracks will be as shown in the Figure. A calibration chart is first prepared showing the relation of angle-of-inclination to the line of equal signal-strength, and a pilot in steering say from A to B1 will first set the frame aerial at an angle of 40‹ and follow the curve marked 40/320 to the point C, where he alters the angle to 100‹ and follows the curve marked 100/260 to his destination. The chart may be used in combination with a gyroscopic pilot.

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