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1. 发明专利

GB2540030A A microwave resonator and a microwave filter 未知
公开(公告)号：GB2540030A
公开(公告)日：2017-01-04
申请号：GB201608670
申请日：2016-05-17
申请人： DAVID RHODES
发明人： DAVID RHODES
IPC分类号： H01P7/06 , H01P1/208 , H01P7/10
摘要： A microwave resonator comprising a resonator cavity, the cavity wall comprising first and second end faces 4, 5 and a side wall 3, the cavity having a length axis extending from the centre of the first face to the centre of the second face, the cavity having a length A along the length axis between the first and second end faces; the cavity having a width axis normal to the length axis, the width of the cavity from the side wall through the length axis to the side wall on the opposite side of the length axis being C; the resonator further comprising a dielectric body/plate 8 arranged within the cavity spaced apart 9, 10 from the first and second end faces, so defining first and second gaps therebetween; the width of the dielectric plate normal to the length axis being at least 90% of C, the thickness B of the dielectric plate along the length axis being at least 60% of A, and the width of the cavity C being at least four times larger than the length A. The microwave resonator is relatively compact compared to known resonators, in particular it is very thin.

2. 发明专利

GB2540007A A tuneable microwave filter and a tuneable microwave multiplexer 未知
公开(公告)号：GB2540007A
公开(公告)日：2017-01-04
申请号：GB201607326
申请日：2016-04-27
申请人： DAVID RHODES
发明人： DAVID RHODES
IPC分类号： H01P1/208 , H03H7/01 , H03H7/46
摘要： A tuneable microwave filter having a passband and stopband with a substantially constant passband bandwidth across a tuneable band, the filter comprising a plurality of resonators, each resonator having an equivalent circuit comprising a short circuited stub 16 in parallel with a capacitor 15, the resonators being electrically coupled together 17,18 such that each resonator is electrically coupled to at least one other resonator by an electrical coupling equivalent to a short circuited stub 19; each short circuited stub being dimensioned such that its electrical length θ varies between 2/9 and 13/36 or a portion of that range across the tuneable band. The tuneable microwave filter has a passband with a bandwidth which is substantially independent of frequency of the centre of the passband across the tuneable band. Accordingly, when changing the frequency of the centre of the passband there is no need to adjust the inter-resonator coupling. This makes adjustment of the filter much simpler and can now be achieved remotely.

3. 发明专利

GB571547A Improvements in or relating to telephone systems 未知
公开(公告)号：GB571547A
公开(公告)日：1945-08-31
申请号：GB372042
申请日：1942-03-20
申请人： GUY R FOUNTAIN LTD , PHILIP DAVID RHODES MARKS
IPC分类号： H04M9/00 , H04R3/12
摘要： 571,547. Direct call systems. FOUNTAIN, Ltd., G. R., and MARKS, P. D. R. March 20, 1942, No. 3720. [Class 40 (iv)] In a system comprising a master station and substations with two-position selecting switches at the master station, a D.C. signalling circuit from a substation is provided irrespective of the position of the corresponding switch. The substations have microphone-loudspeakers L and calling pushes 40 shunted by condensers 41 as in Specification 568,287, and at the master station a calling lamp 34 in series with a resistance 34 both shunted by a condenser 35 are connected in one lead from each substation, the D.C. signalling circuit over the line wires being completed directly to battery B with the switches in the "off" position, as shown. When a switch 25 is in the " speaking " position (upper), the D.C. circuit from battery B includes the secondary of microphone transformer T which is of low resistance. The resistances 34 and rating of the lamps 34 are such that differences of resistance of the circuits and lines, within limits, do not affect the operation of the lamps. The master station has a differential microphone 2 as described in Specification 507,183 with a push-button 6 to complete the microphone circuit including a simplex circuit over relay 10 and ballast resistances 19. The master station receiver comprises headphones P connected, over click preventers 60, and contacts of relay 10 to a part of the secondary of T which thus operates as an auto-transformer, but when the master station is speaking, relay 10 inserts a resistance 61 into the receiving circuit, whereby the headphones P receive just enough side-tone to indicate that the system is in operation. The headphones may be connected to a tertiary winding of the transformer.

4. 发明专利

GB550877A Apparatus for testing microphones 未知
公开(公告)号：GB550877A
公开(公告)日：1943-01-28
申请号：GB973741
申请日：1941-07-31
申请人： GUY R FOUNTAIN LTD , HENRY JOHN HOULGATE , PHILIP DAVID RHODES MARKS
IPC分类号： G03B17/42 , H04R29/00
摘要： 550,877. Converting. FOUNTAIN, Ltd., G. R., HOULGATE, H. J., and MARKS, P. D. R. July 31, 1941, No. 9737. [Class 38 (ii)] [Also in Group XXXIX] Apparatus for use in testing microphones comprises a sound generator coupled to a tube open at the other end, the open end being of small diameter compared with the wavelength of the sound so that a spherical wavefront is emitted. The apparatus provides a small sound-emitting area close to the microphone the effect being similar to that of the mouth. In the apparatus, shown a loud-speaker unit 1, which may be of the type described in Specification 519,625, [Group XXXIX], is coupled to a tube 2 of small diameter compared with the wave-length of the sound frequency used; for example having an inside diameter of 7/10 inch for a frequency of 400 cycles per second. The length of the tube is adjusted so that resonance occurs with a velocity antinode at the open end. in which circumstance a blast of air is produced simulating that produced by the mouth at the beginning of most words. The microphone 7 to be tested is held adjacent to the end of the tube in an open supporting member 8 adjustably clamped on the tube. The speaker may be driven from an oscillator operating at the desired frequency the input being adjusted until the microphone output, as measured by a voltmeter across an output load, is normal, or the microphone output being measured for constant sound strength. Instead of providing a separate oscillator, the apparatus may be made self-exciting by operating the speaker from an amplifier, to which is connected a microphone opposite an aperture in the tube wall situated at a pressure antinode. Alternatively, a microphone 21 of low acoustic impedance may be coupled to the tube through a high acoustic resistance such as a capillary tube 22, or a small piezo-electric element may be mounted in the tube, or a very small velocity microphone may be located at the mouth. Phase-correcting networks may be employed to bring about the required conditions for oscillation, and the selection of the desired frequency from the several frequencies at which the tube may tend to oscillate may be effected by making the response of the microphone a maximum at that frequency, or by adjusting the phase-frequency characteristic of the microphone so that only at the desired frequency is the phase correct for producing oscillation. Specification 507,183,- [Group XXXIX], also is referred to.

5. 发明专利

IL277937A Configurable weapon station having under armor reload 未知
公开(公告)号：IL277937A
公开(公告)日：2021-04-29
申请号：IL27793720
申请日：2020-10-11
申请人： MOOG INC , KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
发明人： KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
IPC分类号： F41A9/34 , F41A9/79 , F41A23/24 , F41A27/18

6. 发明专利

IL277937D0 Configurable weapon station having under armor reload 未知
公开(公告)号：IL277937D0
公开(公告)日：2020-11-30
申请号：IL27793720
申请日：2020-10-11
申请人： MOOG INC , KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
发明人： KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
IPC分类号： F41A9/34 , F41A9/79 , F41A23/24 , F41A27/18

7. 发明专利

GB2540006A A tuneable TEM mode microwave resonator and a tuneable microwave filter 未知
公开(公告)号：GB2540006A
公开(公告)日：2017-01-04
申请号：GB201607318
申请日：2016-04-27
申请人： DAVID RHODES
发明人： DAVID RHODES
IPC分类号： H01P1/207 , H01P1/208 , H01P7/06
摘要： A tuneable TEM mode microwave resonator comprising an electrically conducting resonator cavity 21 comprising: end faces 22 and 23; side wall 24; an electrically conducting resonator body 27 spaced apart from the cavity side wall, the end of the resonator body remote from the first end face having a recess 28 therein, the bottom of the recess being defined by a recess base 30, the recess having a recess side wall and recess mouth 29; an electrically conducting cup side wall 36 extending from the second end face 23 part way to the resonator body to define a cup 34 having a cup base 35 and a cup mouth 37; and, a dielectric body 30 being arranged at least partially within the recess and being adapted to be displaced along a displacement axis between a first position outside the cup and a second position where it is received by the mouth of the cup; the dielectric body having a length L along the displacement axis, the distance between the base of the cup and the recess mouth being less than L.

8. 发明专利

IL250174A Configurable weapon station having under armor reload 未知
公开(公告)号：IL250174A
公开(公告)日：2020-10-29
申请号：IL25017417
申请日：2017-01-18
申请人： MOOG INC , KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
发明人： KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
IPC分类号： F41A9/79 , F41A9/34 , F41A23/24 , F41A27/18

9. 发明专利

IL251536D0 Ammunition storage system 未知
公开(公告)号：IL251536D0
公开(公告)日：2017-05-29
申请号：IL25153617
申请日：2017-04-03
申请人： MOOG INC , KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES , STEVEN W HAYES
发明人： KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES , STEVEN W HAYES
IPC分类号： F41A20060101
摘要： An ammunition container for storing a belt of linked ammunition, the ammunition container comprising:a pair of transversely spaced side walls defining an internal space between the pair of side walls;at least one bridge member connecting the pair of side walls;the pair of side walls defining a rear opening and a bottom opening continuous with the rear opening, the rear and bottom openings allowing access to the internal space between the pair of side walls; anda pair of longitudinal support rails respectively mounted to an inner surface of a corresponding one of the pair of side walls, each of the pair of support rails including a front end and a rear end.

10. 发明专利

IL277938A Configurable weapon station having under armor reload 未知
公开(公告)号：IL277938A
公开(公告)日：2021-04-29
申请号：IL27793820
申请日：2020-10-11
申请人： MOOG INC , KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
发明人： KEVIN LUNG , MATTHEW MARTINEZ , FRANK MUELLER , DAVID RHODES
IPC分类号： F41A9/34 , F41A9/79 , F41A23/24 , F41A27/18

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