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11. 发明专利

GB581740A Improvements in electrical potentiometers 未知
公开(公告)号：GB581740A
公开(公告)日：1946-10-23
申请号：GB120043
申请日：1943-01-23
申请人： JOHN BELL , ERIC MILES LANGHAM , CHARLES SEYMOUR WRIGHT
IPC分类号： H01F21/12 , H01F29/06
摘要： 581,740. Inductances. BELL, J., LANGHAM, E. M., and WRIGHT, C. S. Jan. 23, 1943, No. 1200. [Class 38 (ii)] [Also in Group XIX] A potentiometer, specially adapted for use in calculating apparatus, comprises a winding arranged on a magnetic core and over a former 3 provided with accurately spaced teeth, slots or the like 4 which locate the turns of the winding. The former 3 may be constructed from a plastic by machining after which the teeth may be formed by a hot pressing operation. The winding is bared over a zone 9 where the teeth 4 are situated and is engaged by a contact roller 10 of carbon or metal mounted slightly askew on a rotatable arm 8. The supply source is connected to the winding at the points 21 and 15, the latter point being adjustable and constituted by another roller engaging a different bared portion of the winding. Linear or other relationships between the voltage tapped off and the displacement of the contact member may be obtained by suitable arrangements of the coil or contact arm. For example by making the arm 27 sweep over the flat face 26 of a coil a sine relationship is obtained, Fig. 7. The potentiometer may be used in calculating-apparatus for effecting multiplication or division (see Group XIX).

12. 发明专利

GB579339A Improvements relating to cathode ray tubes 未知
公开(公告)号：GB579339A
公开(公告)日：1946-07-31
申请号：GB2001143
申请日：1942-11-30
申请人： COSSOR LTD A C , LESLIE HERBERT BEDFORD , JOHN BELL , ERIC MILES LANGHAM
IPC分类号： G01R13/22 , G06G7/22 , G06G7/80 , H04N3/26
摘要： 579,339. Cathode-ray tubes. COSSOR, Ltd., A. C., BEDFORD, L. H., BELL, J., and LANGHAM, E. M. Nov. 30, 1942, No. 20011/43. Divided out of 579,325, [Group XIX]. [Class 39 (i)] [Also in Group XXXVI] Apparatus for simultaneously displaying, by means of the co-ordinates of a spot position on the screen of a cathode ray tube, the amplitudes of two co-phased alternating voltages relative to a third, comprises means for applying between the cathode of the cathode ray tube and the electrodes forming the gun alternating voltages in phase with each other, and in phase with alternating voltages applied to two pairs of deflecting plates producing deflections in mutually perpendicular directions. As shown, a transformer 12, energized by a source 13, has a secondary 14 from which the voltages of the first and second anodes 4, 6, and the focusing electrode 5 relatively to the cathode are derived by way of the potentiometer 17. The control electrode voltage is maintained negative to the cathode so as to suppress the beam except for a third of each half cycle. This voltage may be direct or alternating but is preferably compounded of both derived from a tapping 20 on the potentiometer 17 and a resistance 21 constituting the load of a diode rectifier 22. The deflecting voltages are applied to one of each deflecting pair, 8, 10 from the secondary 16 of the transformer 12, and shift voltages to the other plates 79 from a secondary 15. Alternatively, the deflecting voltages may be applied symmetrically to each pair, with or without shift voltages. Modulators 24, 25 modulate the deflection voltages in accordance with the phenomena to be represented.

13. 发明专利

GB579337A Improvements relating to electrical measuring apparatus 未知
公开(公告)号：GB579337A
公开(公告)日：1946-07-31
申请号：GB2000943
申请日：1942-11-30
申请人： COSSOR LTD A C , LESLIE HERBERT BEDFORD , JOHN BELL , ERIC MILES LANGHAM
IPC分类号： G01R17/16
摘要： 579,337. Electric meters. COSSOR, Ltd., A. C., BEDFORD, L. H., BELL, J., and LANGHAM, E. M. Nov. 30,1942, No. 20009/43. Divided out of 579,325, [Group XIX]. [Class 37] A null-voltage indicating circuit comprises a pair of similar thermionic valves 1, 2 having similar anode loads 3, 4, a direct current null indicating meter 11 connected between the anodes of said valves, a common cathode load consisting of two resistance potentiometers in parallel with each other and with a smoothing condenser 13, means to excite the anode circuit with alternating voltage, means to connect the grid of valve 2 to a tapping on one of said potentiometers 5 and means to inject the voltage to be nulled between the grid of valve 1 and a tapping on the other of said potentiometers, so selected that when said voltage is zero a null indication is obtained on the meter 11. To adjust the circuit for inequalities, switch 9 connects the grid of valve 1 to the mid point of resistance 6 and the tapping of the potentiometer 5 is adjusted until the meter 11 reads zero. A direct voltage to be measured is applied to terminals 10, put into circuit by the switch, and the movement of tapping 8 from mid position, to give a null indication, is a measure of the voltage. The tapping may be graduated or may be mechanically coupled to another instrument which it is desired to set according to the measured voltage. Another voltage applied at terminals 14 can be measured in a similar manner on potentiometer 7. An alternating voltage in phase with the source 16, can be measured by being put into series with a potentiometer connected across the secondary of a transformer supplied by the source 16, the total output being applied to terminals 15. The adjustment of the potentiometer when a null reading is obtained is an indicating of the alternating voltage.

14. 发明专利

GB578639A Improvements in or relating to machines for sealing the ends of collapsible tubes by electric welding 未知
公开(公告)号：GB578639A
公开(公告)日：1946-07-05
申请号：GB653744
申请日：1944-04-07
申请人： WILLIAM JAMES ABBOTT , JOHN BELL , HILLS & LUCAS LTD
IPC分类号： B23K11/08 , B29C65/04 , B29C65/78 , B65B51/28
摘要： 578,639. Collapsable tubes. ABBOTT, W. J., and BELL, HILLS, & LUCAS, Ltd., J. April 7, 1944, No. 6537. [Class 66] [Also in Group XXII] In a machine for electric welding the ends of collapsable bodies of the type comprising a rail electrode and a rotary electrode mounted in a slide in a guideway and traversed along the rail, a direct electrical connection not passing through the slide and guideway and consisting of a mercury contact is provided between the electrode shaft and the secondary conductors of the transformer. The machine may comprise an endless conveyer 15 provided with tube holders 17 and moved step by step past a number of stations such as 23, 18-22 for filling the tubes, closing the ends and folding them twice, the ends being welded after closing between a rail electrode 31 and a disc electrode 35 traversed along the rail by a connecting rod 59 and lever 61 from a cam 62 on the shaft 11. Specification 578,640 is referred to.

15. 发明专利

GB519756A Electrical make and break switches with sparking preventing arrangements 未知
公开(公告)号：GB519756A
公开(公告)日：1940-04-04
申请号：GB2859838
申请日：1938-10-01
申请人： JOHN BELL DIXON
IPC分类号： H01H50/68
摘要： 519,756. Electromagnetic interrupters. DIXON, J. B. Oct. 1, 1938, No.'28598 [Class 38 (v)] The operating-coil of an interrupter is shunted through a "sparkabsorbing" circuit which is established as long as the main contacts are opened and interrupted when they are closed. The diaphragm A of a pump for supplying fuel to the carburettor of an internal - combustion engine, is adapted to be raised, against the action of spring A , by the armature A of a solenoid coil A . The upper end of A' is threaded in a block B pinned to an arm B' which is pivoted at B . An arm C. also pivoted at B , is connected to B' by a spring D the ends of which engage over pins D , D on the two-arms. The spring D functions as a dead-centre toggle spring, so that when B' is raised by the armature A the spring snaps C downwards, and when B' is lowered again, the spring snaps C upwards. Arm C carries a contact C on which bears a contact E on a leaf-spring E' which also carries a contact F adapted, in the lowered position of C, to engage a contact F , the arrangement being such that the latter arrests the movement of spring E' and ensures that F', F engage before C , E separate. The former make a closed circuit for the solenoid coil through resistance F', whereas the latter are in the main solenoid circuit. Instead of a simple resistance, a condenser or a winding of opposite magnetic effect to the main winding may be employed with a resistance.

16. 发明专利

GB591133A Improvements in electric control systems 未知
公开(公告)号：GB591133A
公开(公告)日：1940-02-06
申请号：GB3211838
申请日：1938-11-05
申请人： JOHN BELL , CHARLES SEYMOUR WRIGHT
IPC分类号： G05D3/12
摘要： 591,133. Electric control systems. BELL, J., and WRIGHT, C. S. Nov. 5, 1938, No. 32118. [Class 40 (i)] To avoid the lag in a correspondence control system which occurs when the controlling member is moving, an additional advancing movement is imparted to the controlled member proportional to the error signal. As shown, movement of a handle 1 connected to transmitter 2 causes a signal to be induced in the rotor of receiver 5 which controls follow-up motor 10 through amplifier 8 and grid controlled rectifier 9. Shaft 11 drives the load through differential gear 13 in which the movement of a compensating shaft 14 driven by motor 15 is also imparted to the load. Motor 15 is controlled by a rectifier 16, which is actuated in accordance with the voltage difference between the output of amplifier 8 and that of a voltage regulator 17 which is coupled to motor 15 so that shaft 14 and hence the load, is advanced in accordance with the error signal which is assumed to be proportional to the lag. Regulator 17 may be replaced by a potentiometer.

17. 发明专利

GB591131A Improvements in electrical distant control apparatus 未知
公开(公告)号：GB591131A
公开(公告)日：1938-07-11
申请号：GB3303936
申请日：1936-12-02
申请人： JOHN BELL , CHARLES SEYMOUR WRIGHT
IPC分类号： G05D3/12
摘要： 591,131. Electric control systems. BELL, J., and WRIGHT, C. S. Dec. 2, 1936, No. 33039. [Class 40 (i)] In a correspondence control system, movement of the energized rotor 2 of a resultant field transmitter device 1 causes a voltage from the receiver rotor 6 to be applied through amplifier 9 to the stator of a device 10, whose energized rotor 13 actuates a hydraulic servomotor 15, which drives the load and rotor 6 into correspondence with rotor 2. Rotor 13 is supplied through a suitable phase-shifting device 14 and is caused to move proportionally to the stator signal by restraining it with springs or designing it so that it " cogs ". In a modified arrangement, the receiver rotor is energized and the amplifier input is connected to the transmitter rotor.

18. 发明专利

GB473308A Improvements in or relating to slidable boxes or containers 未知
公开(公告)号：GB473308A
公开(公告)日：1937-10-11
申请号：GB1057936
申请日：1936-04-09
申请人： HUDSON SCOTT & SONS LTD , JOHN BELL IRVING
IPC分类号： B65D47/28
摘要： 473,308. Boxes. HUDSON SCOTT & SONS, Ltd., and IRVING, J. B. April 9, 1936, No. 10579. [Class 18] A box with a flanged cover is provided with an aperture e in the cover flange normally covered by the wall of the box body. Alternatively, the aperture e may be in the body wall, and may normally be covered by the flange of the cover. Indentations c in the cover flange engage in and are guided by grooves d in the body wall. The groove d may be helical. Projections f may be provided upon the body part to facilitate opening of the box.

19. 发明专利

GB402530A An automatic guard for rotary cutters, particularly such as are used on milling machines 未知
公开(公告)号：GB402530A
公开(公告)日：1933-12-07
申请号：GB2070432
申请日：1932-07-22
申请人： JOHN BELL , PERCY ACKLAND EMMETT , PROJECTILE AND ENGINEERING COM
IPC分类号： F16P3/00
摘要： 402,530. Machinery guards. BELL, J., 29, Radnor Road, Handsworth, Birmingham, EMMETT, P. A., 10, Ryecroft Street, Fulham, and PROJECTILE & ENGINEERING CO., Ltd., New Road, Wandsworth Road, both in London. July 22, 1932, No. 20704. [Class 80 (iv).] A guard for the cutters of milling and like machines comprises a hood 3 mounted on a spindle 4 having a crank arm 8. An offset pin 9 on the arm 8 is adapted to engage a cam slot 10 in a plate 11 secured to the work table 12. When the work is carried forward by the table the pin is raised by the slot with the result that the hood tilts about the axis 4 and uncovers the cutters 1. The spindle 4 is mounted in side plates 6 suspended adjustably from an overhanging arm 7 of the machine. In a modified construction the cam slot is replaced by an edge cam having rising, level, and falling portions.

20. 发明专利

GB253841A Neck-tie supporter 未知
公开(公告)号：GB253841A
公开(公告)日：1926-06-24
申请号：GB739226
申请日：1926-03-17
申请人： JOHN BELL HARRISON
IPC分类号： A41D25/12
摘要： 253,841. Harrison, J. B. March 17, 1926. Necktie retainers. - A necktie retainer comprises a U-shaped device of metal, bone, celluloid &c. having an open-ended key-hole slot. A in each limb, and a curved prong or pin B punched out of the material, or separatelv formed and attached. The back of the device is roughened with closely spaced V-shaped grooves. In use, the device is sprung over the shank of the collarstud between the head of the stud and the collar, and the tie is impaled on the forwardly projecting prong B.

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