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1. 发明专利

GB581165A Method of and apparatus for the detection by electro-magnetic radiation of the presence and location of objects in space 未知
公开(公告)号：GB581165A
公开(公告)日：1946-10-03
申请号：GB437541
申请日：1941-04-01
申请人： MARCONI WIRELESS TELEGRAPH CO , JOHN MEGARRY FURNIVAL , NOEL MEYER RUST , GEORGE EARNSHAW PARTINGTON
IPC分类号： G01S1/02
摘要： 581,165. Radiolocation ; Wireless systems ; receivers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., FURNIVAL, J. M., RUST, N. M., and PARTINGTON, G. E. April 1, 1941, Nos. 4375 and 11151. [Class 40 (v)] A radio reflection detector comprises a superregenerative trans-receiver having means for generating and transmitting ultra-high-frequency oscillations, means for periodically quenching at a variable frequency the oscillations generated, means for receiving oscillatory energy reflected by an objective body and for controlling in accordance with received energy the amplitude of the oscillations generated, and a device for detecting relative movement between the radio reflection detector and the objective body. The reflection detector may also include means calibrated in units of distance for varying the frequency of the periodic quenching. The amplitude of the generated oscillations indicates distance, while periodic change in the relations between the transmitted and received waves indicates relative velocity. The trans-receiver consists of an ultra-highfrequency oscillation generator, a quenchfrequency generator, and an audio-frequency detector. The ultra-high-frequency oscillation generator includes a valve V1, Fig. 1, having a quarter-wave hairpin line B between one leg of the filament and the positive terminal 6v of a source of filament heating current. A quarterwave aerial A is connected to the bend of the line B. Between the other leg of the filament and the earthed negative terminal of the source of heating current is a short-circuited coaxial line CL1, to the inner conductor of which the cathode is also connected. Between the control grid and earth is an open-circuited coaxial line CL2 and resistances r, Rg constituting the grid leak. The anode is connected through a small condenser C1 to the earthed outer conductor of the coaxial line CL2 and is also connected to the positive supply source +300V through an ultra-high-frequency choke F. The quenchfrequency oscillation generator includes a condenser C2, the primary winding La of a reaction transformer, the choke F, the valve V1 and the coaxial line CL 1. The secondary winding Lg of the reaction transformer is tuned by a variable condenser Cg, this tuned circuit being connected by means of a blocking condenser C4 between the junction of the resistance r, Rg and the earthed end of the line CL1. A radiofrequency choke RFC is connected between the choke F and the positive terminal +300V. For the detection of signals picked up by the trans-receiver an audio-frequency choke LFC is provided. Audio-frequency voltages produced across this produce currents in the primary winding of a transformer T, the secondary voltage of which is amplified in a valve V2 and applied to a loud-speaker LS. In order to ensure a constant phase-time position of the ultra-high-frequency oscillations generated by the trans-receiver a locking circuit is provided. This comprises an ultra-high-frequency oscillation generator operating at substantially the same frequency as the trans-receiver, and may include an audio-frequency modulator so as to produce a musical tone. The oscillator of the locking circuit includes an acorn valve V3 having ultra-high-frequency chokes Uhf in the filament leads and short wires forming a transmission line TL between the grid and anode. This is terminated by a variable condenser Ct for controlling the frequency of the oscillations produced. Anode modulation of the oscillations is provided by means of a tone frequency generator including a valve V4. A variable series anode resistance Rt varies the high tension and therefore the strength of the oscillations. The locking circuit is mutually coupled to the trans-receiver. The strength of the locally injected signal is controlled by varying the coupling or the resistance Rt. The second harmonic of the locking circuit provides the de-sensitizing signal. The quench-frequency gives a rough indication of the distance if varied to maintain a constant amplitude of the generated energy. The pitch of the note produced by auto modulation indicates the instantaneous speed of relative movement. Increase of range may be obtained by increasing the amplitude of every nth pulse of transmitted energy. A number of ranges of quenchfrequencies may be obtained by substituting different values of the primary and secondary windings La. Lg and the condenser C4 by means of a multiple-arm switch. Two projectors P1, P2, Fig. 7, may be provided for projecting two overlapping beams which may be characterised by the morse code letters E and T. Comparison of received energy from the two beams may be effected by means of a mechanical or electronic switch S automatically or manually controlled. The output of the trans-receiver A is integrated and applied to a central-zero visual indicator V1, which may be interconnected with the switch S to give a sense of direction. The interference note is heard on a loud-speaker or telephone AR. For three-dimensional operation the transmitter may include at least three overlapping differently characterised angularly displaced beams. Three beams may be transmitted in cyclic succession, the first transmitting dots, the second short dashes, and the third long dashes the time between successive transmissions on any one beam being occupied by one transmission on each of the other two in succession. Instead of a single needle indicator V1, there may be employed an intersecting needle indicator having two needles for a twobeam system or three needles for a three-beam system arranged so that their ends enclose an equilateral triangle in the " on course " condition. In the two-needle system the amplitude of the signal governs the rise of the needles so that, in addition to an on-course indication, a distance indication will be given. In the threeneedle system the rise of the needles increases the size of the triangle and thus indicates distance. Instead of using overlapping beams for the directional effect, quasi-optical methods employing reflectors or horns may be used, particularly when relative movement is to be detected and its speed measured. The spread of the directional beam may be made variable so as to vary the field of observation.

2. 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.

3. 发明专利

GB174093A Improvements in microphones or telephone transmitters 未知
公开(公告)号：GB174093A
公开(公告)日：1922-01-20
申请号：GB1671219
申请日：1920-10-20
申请人： JOHN MEGARRY FURNIVAL
IPC分类号： H04R29/00
摘要： 174,093. Furnival, J. M. Oct 20, 1920. Pivoting-adjustments. - The sensitiveness of microphones is controlled by a pad b mounted on a spring c carried by an arm d moving stiffly about a pivot e, the pad bearing on a second diaphragm a. The pressure of the spring can be adjusted by the screw f.

4. 发明专利

GB161667A Improvements in wireless direction finding means for aircraft 未知
公开(公告)号：GB161667A
公开(公告)日：1921-04-12
申请号：GB100720
申请日：1920-01-12
申请人： HAROLD ROBERT CORBY VAN DE VEL , JOHN MEGARRY FURNIVAL
IPC分类号： G01S1/02
摘要： 161,667. Velde, H. R. C. van de, and Furnival, J. M. Jan. 12, 1920. Drawings to Specification. Bearings, determining; signalling to aircraft.- In direction-finding apparatus for aircraft, the movable part is actuated by movement of the rudder bar, for instance the search coil of a Bellini-Tosi system may be connected by control wires to opposite ends of the rudder bar or auxiliary attachment in such a manner that, when the rudder moves in a clockwise direction, the coil moves counterclockwise. By movement of the rudder to such a position that signals from the station to which flight is intended are a minimum, the correct course is always maintained.

5. 发明专利

GB582934A Apparatus for the detection by electro-magnetic radiation of the presence and location of objects in space 未知
公开(公告)号：GB582934A
公开(公告)日：1946-12-03
申请号：GB995841
申请日：1941-08-05
申请人： MARCONI WIRELESS TELEGRAPH CO , JOHN MEGARRY FURNIVAL , NOEL MEYER RUST , GEORGE EARNSHAW PARTINGTON
IPC分类号： G01S7/282
摘要： 582,934. Wireless object - locating systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., FURNIVAL, J. M., RUST, N. M., and PARTINGTON, G. E. Aug. 5, 1941, No. 9958. [Class 40 (v)] Apparatus for detecting objects by the reflection of radio waves comprises in combination a radio-transmitter and co-operating. receiver, an aerial system adapted when energized by the transmitter to transmit sharplydefined overlapping beams and also to receive the reflected waves, and means whereby the aerial is associated alternately with the trans-- mitter and the receiver. The use of the same aerial for reception and transmission ensures that it is in the correct attitude for optimum reception of the reflected waves originally radiated from it, though they may be polarized at the source. The transmission and reception may be effected by a super-regenerative transreceiver such as that described in Specification 581,165. Preferably two overlapping angularly displaced beams are projected alternately in an interlocking signal rhythm as in the arrangement shown, in which horn radiators A, B on the wings of an aircraft are connected to a transreceiver TR by wave-guides which are alternately closed and opened by a rotating shutter RS. For three-demensional operation, at least three overlapping beams are transmitted. A dot, a short dash, and a long dash may be transmitted in cyclic succession by three overlapping beams. Actual or visual indicators may be employed for comparing the relative strengths of the components.

6. 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.

7. 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.

8. 发明专利

GB179321A Improved means for supplying current to valve amplifiers employed in wireless signalling 未知
公开(公告)号：GB179321A
公开(公告)日：1922-05-05
申请号：GB430021
申请日：1921-02-05
申请人： PETER PENDLETON ECKERSLEY , JOHN MEGARRY FURNIVAL , HAROLD ROBERT CORBY VAN DE VEL , JAMES STEWART JUNIOR
IPC分类号： H04B1/16
摘要： 179,321. Eckersley, P. P., Furnival, J. M., Velde, H. R. C. van de, and Stewart, J. Feb. 5, 1921. Combined transmitting and receiving arrangements.-The plate circuits of a transmittir.gvalve and a receiving-valve are both supplied by the same dynamo, and the change over from transmitting to receiving reduces the field strength of the dynamo and so effects a reduction in the voltage applied to the receiving-valve. The high-tension direct-current generator B is excited by a winding D which is connected across a low-tension source C either directly or through an adjustable resistance G according to the position of a switch E, which also determines whether the generator B is connected to energize the transmitting-valve F or the receiving- valve H. Additional contacts may connect the filaments of these valves across the low-tension machine C. Commutator noises are suppressed by an accumulator K and condenser P connected across the low-tension rotor C, and bv a series choke-coil L and shunt condensers M in the high-tension circuit of the receiving valve. A smoothing condenser N is also provided across the rotor B.

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