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1. 发明专利

GB337785A Improvements in or relating to electrical methods of and means for detecting, measuring and recording changes in physical conditions or properties of materials and the like 未知
公开(公告)号：GB337785A
公开(公告)日：1930-10-30
申请号：GB2338529
申请日：1929-07-30
申请人： JOHN JOSEPH DOWLING , KENYON STUART GRIEVE SOMMERVIL
IPC分类号： G01R27/02
摘要： 337,785. Dowling, J. J., and Sommerville, K. S. G. July 30, 1929. Gauging-apparatus.-Movements of parts of a measuring device of any sort such as an enginebalancing, machine, balance, extensometer, &c., or variations in the physical state of a material such as tobacco are measured by their effect on the capacity of a condenser which is rapidly charged and discharged so as to affect a galvanometer, telephone &c. in alternation with some standard device, the arrangement being such that the resultant indication of the galvanometer can be brought to zero by adjusting the standard device or a " trimming condenser," the capacity of the condenser being thus measured independently of voltage changes in the circuit. In the arrangement shown in Fig. 1, the test condenser Ct and standard condenser Cs are so arranged that they are alternately thrown into the oscillating circuit of a valve 1 by a vibrating contact 10 operating at from 200 to 500 cycles per second. The anode current of the valve 1 passes through telephones 6, a filter-device 9 being provided to cut out all disturbances except those arising from want of balance in the condensers Cs and Ct. When the capacities of the condensers are equal no sound is heard in the telephones, and if they are unequal silence can be produced by adjusting a condenser Cs in parallel with the condenser Ct, the adjustment necessary giving the capacity of the condenser Ct. The telephone 6 can be replaced by a. galvanometer in which case the condensers Cs, Ct are discharged through the galvanometer in opposite directions by means of a vibrating switch. An arrangement of this kind is described in which the switches are operated by cams on a rotating shaft, the arrangement being such that the switches for charging the condensers are closed for a longer time than those for condensing the valve circuit to the galvanometer circuit and these again for a longer time than a switch controlling the galvanometer circuit; the galvanometer is provided with a shunt resistance. In the arrangement shown in Fig. 4, the condensers Cs , Ct are charged to the same potential by a battery 14 and then discharged in opposition to each other to the grid of the valve 1, so that no charge is imparted to the grid unless the condensers are of equal capacity. The valve may be dispensed with and the opposed condensers discharged directly through a galvanometer.

2. 发明专利

DE455987C 未知
公开(公告)号：DE455987C
公开(公告)日：1928-02-11
申请号：DED0047743
申请日：1925-04-10
申请人： JOHN JOSEPH DOWLING
IPC分类号： H01H47/24

3. 发明专利

GB252512A Improvements in or relating to thermionic indicating means responsive to light variations 未知
公开(公告)号：GB252512A
公开(公告)日：1926-06-03
申请号：GB983425
申请日：1925-04-15
申请人： JOHN JOSEPH DOWLING
IPC分类号： G08B5/22
摘要： 252,512. Dowling, J. J. April 15, 1925. Addition to 237,952. Converting direct currents.-The light interrupting means in a system of indicating light strength as described in the parent Specification is operated by the receiver system. Fig. 1 shows a selenium cell 6 and a thermionic audio-frequency amplifying system of which the valve 9 serves as a detector to operate a signalling device when the cell ceases to be subjected to an interrupted light beam as described in the parent Specification. The electromagnet 23 arranged in the plate circuit of the valve 9 is adapted to energize a tuning fork 22 one limb of which interrupts the light beam at a focus point 3. The interrupter may be rendered self-starting by arranging a condenser 24 so adjusted that the circuit 23, 24 is resoant. To avoid " burning glass" action sun cones 40, 40 may be provided. Instead of a tuning fork a vibratory reed carrying a mirror 31, Fig. 6, may be employed and a duplex light cell or two light cells 6 with mirrors 38 may be used. In modifications, discs provided with a number of armatures are rotated by one or more electromagnets arranged in the plate circuit of the valve 9 and the discs may be slotted or carry mirrors to interrupt or reflect the light.

4. 发明专利

GB414414A Apparatus for preparing samples for testing characteristics of plastic, granular, orpulverulent materials 未知
公开(公告)号：GB414414A
公开(公告)日：1934-08-03
申请号：GB341833
申请日：1933-02-03
申请人： JOHN JOSEPH DOWLING
IPC分类号： G01N27/22
摘要： 414,414. Moulding and testing plastic substances by centrifugal means. DOWLLING, J. J., 2, Garfield Villas, Garville Avenue, Rathgar, Co. Dublin. Feb. 3, 1933, No. 3418. Convention date, Feb. 6, 1932. [Class 87 (ii).] Apparatus for preparing samples of plastic, granular, or pulverulent material and testing them for weight per unit volume, moisture content, and the like, comprises two superposed rotary members of conducting material spaced by insulating material to form a mould chamber which is adapted to be rotated while the material is fed in, so that it is packed by centrifugal force, together with means for including the members in an electric circuit whereby the properties may be tested without removing the sample from the apparatus and while the apparatus is either rotating or stationary. Figs. 1 and 2 show one construction in which metallic mould members 1, 4 are insulated by the ring 5, the top member 1 being held down by clips 14 fitted with insulating pads 14a. Pins 9 and 19 prevent relative angular movement of the mould members when they are rotated by the motor 12. Material is inserted at the hopper 7 and the density of packing tested by utilizing the contacts 23 to include the material in an electric circuit and measure its resistance or capacity. After testing, the top of the mould is lifted off and the article removed, or the bottom of the mould is lowered and the contents ejected centrifugally by further rotation of the opened mould. Fig. 4 shows a modified construction in which a conical chamber 25 is formed between a core member and an outer casing attached thereto by insulated blocks 26. Material is supplied by the hopper 7 and the bottom 28 of insulating material is lowered on the motor shaft 27 by lever mechanism attached to the sleeve 30. The contacts 31 serve to pass the current through the material. Specification 337,785, [Class 37], is referred to.

5. 发明专利

GB397167A Improvements in and relating to methods of and means for subjecting a specimen of material to a fatigue test 未知
公开(公告)号：GB397167A
公开(公告)日：1933-08-14
申请号：GB426032
申请日：1932-02-12
申请人： STEPHEN MITCHELL DIXON , JOHN JOSEPH DOWLING
IPC分类号： G01N3/38
摘要： 397,167. Testing physical qualities of materials. DIXON, S. M., City & Guilds (Engineering) College, Exhibition Road, South Kensington, London, and DOWLING, J. J., University College, Dublin. Feb. 12, 1932, Nos. 4260 and 29743. [Class 106 (ii).] A specimen of material is subjected to a fatigue test by causing it to vibrate in an electric field through the agency of an electric current passing through it. In the apparatus shown in Fig. 2, the current is regulated by the movements of the specimen 2, which is suspended by a pair of current-carrying torsion wires 12, the magnetic field being that of an electromagnet 15. Light from a lamp 16 falling upon a photo-electric cell 18 is periodically occulted by the specimen 2 passing through a focus of the optical system 17, 17 directing the light on the cell 18, the periodic current from which is passed into an amplifier 19 connected to a step-down transformer 21 supplying from its low-voltage side the operating current through the specimen. In a modified circuit the amplifier 19 is connected to a motorgenerator the output from which is fed to a transformer for supplying the current to the specimen. In another modified circuit the low-voltage side of a transformer, connected on the high-voltage side to an amplifier as in the apparatus of Fig. 2, is connected to the grids of a pair of thyratron valves, the output from the valves being fed to the specimen through a condenser or transformer. In another construction shown in Fig. 5, the specimen 2 is carried in wire loops 34, connected through terminals 35a, 36a to the in-put of a step-up transformer 40 and through terminals 35b, 36b to the output of a step-down transformer 44, these two transformers being connected through valves 45, 46 to an intermediate tuned transformer 47.

6. 发明专利

IE11982L ELECTRICAL TESTING 未知
公开(公告)号：IE11982L
公开(公告)日：1931-01-30
申请号：IE11982D
申请日：1930-07-25
申请人： JOHN JOSEPH DOWLING , KENYON STUART GRIEVE SOMERVILLE
IPC分类号： G01N27/22

7. 发明专利

GB237952A Improvements in or relating to thermionic indicating means responsive to light variations 未知
公开(公告)号：GB237952A
公开(公告)日：1925-08-11
申请号：GB925324
申请日：1924-04-11
申请人： JOHN JOSEPH DOWLING
IPC分类号： G08B5/22 , G08B17/103
摘要： 237,952. Dowling, J. J. April 11, 1924. Light, control of signalling and other apparatus by.-Thermionic indicating means responsive to light variations comprises an interrupted beam of light falling on a photo-electric cell operatively associated with a thermionic amplifier so arranged that the indicating means is rendered operative, if the cell is not effected by the regularly interrupted light beam, by a relay under the control of the valve system and of a battery independent of the valve system. Fig. 1 shows a light beam source 1, rotating disc 4 with apertures 3, lenses 2, 6 influencing a selenium cell 7 connected to an audio-frequency amplifier to affect a moving coil relay 12 having a biasing current from battery 17 and a regulating resistance 18. The light rays may be brought to a focus by the lens 6 in front of a screen or diaphragm 11 arranged in front of the cell 7. Fig. 4 shows a modified amplifier in which the cell 7 is arranged in series with an equal resistance 47 and the potential is applied to the grid of the valve through a condenser 45. In a further modification a clockwork or other mechanically driven switch is employed to disconnect the batteries except for a brief period at intervals so as to economise battery power. In this modification the moving coil relay influences a second relay so arranged that the signal or indication given by the apparatus is unaffected by the current interruption. The apparatus may be employed to detect haze or fog and a colour screen or cells sensitive to special regions of the spectrum may be used. It is also applicable to detecting smoke or turbidity in liquids or for recording the passage of objects. A recording galvanometer may be used instead of, or in addition to, the relay 12.

8. 发明专利

GB548228A Apparatus for indicating electric currents 未知
公开(公告)号：GB548228A
公开(公告)日：1942-10-01
申请号：GB430941
申请日：1941-03-31
申请人： JOHN JOSEPH DOWLING , SOLUS TEORANTA
IPC分类号： H01K3/30
摘要： 548,228. Indicating-apparatus. DOWLING, J. J., and SOLUS TEORANTA. March 31, 1941, No. 4309. Convention date, July 2, 1940. [Class 106 (iv)] [Also in Group XXXVI] The values of two currents and their ratio are simultaneously indicated by optical means on a screen or the like. Fig. 1 shows an arrangement for testing the luminous efficiency of electric lamp bulbs. A source of constant D.C. voltage such as a battery A supplies the lamp B under test in series with a small resistance D, across which is connected a mirror galvanometer Q in series with a resistance E. The lamp B is placed in an integrative sphere S so that the output of a photo-electric cell F is proportional to the mean spherical candle power. This output is applied to a second mirror galvanometer R. A spot of light is focused on the mirror of the galvanometer Q by means of a cylindrical lens so that a vertical straight line is formed on a screen. A spot of light is similarly focused on the mirror of the galvanometer R and from there is reflected on to two inclined mirrors in turn so that a horizontal straight line is formed on the screen. The deflection of the galvonometer Q, and hence the position on the screen of the vertical line, is proportional to the current taken by the lamp, and hence to the watts, since the voltage is constant. The position of the horizontal line indicates the lumens emitted by the lamp, the point of intersection of the lines giving the luminous efficiency. An area in which this point must lie for standard limits of efficiency may be marked out on the screen. Fig. 2 shows a modification for testing by alternating current. The primary windings O, O1 of two matched transformers are connected in parallel across an A.C. source A 1 , each primary having a resistance P, P 1 in series, these resistances being equal. The primary winding of a third transformer Z is connected in series with a variable resistance T between the junction points U, Y of the transformers O, O 1 and resistances P, P 1 . The secondary winding of the transformer Z is connected through a rectifier W to the mirror galvanometer Q. The secondary winding of the transformer O is left open and the secondary winding of the transformer O 1 is provided with tappings V 1 , V2, V3 so that lamps to be tested can be plugged into appropriate voltages. A second variable resistance T 1 , ganged with the resistance T, is connected in series with the photo-electric cell F and mirror galvanometer R. To prevent injury to the galvanometers by an overload, an overload relay such as a gas relay valve may be included in the circuit of the transformer Z and operate relays to cut out the two galvanometers and switch on a warning signal. The gas relay valve may have its own transformer. The screen may be graduated vertically in lumens and horizontally in watts, or the value of any two currents can be simultaneously indicated as well as their ratio. The indications may be photographically recorded. The invention is applicable to the plotting of any curves the co-ordinates of which can be represented by two electric currents, such as the characteristic curves of radio valves, magnetic hysteresis curves for simultaneously indicating the velocity and temperature of a circulating fluid, or for recording on a screen at a central station the bearings of a ship from two observation posts on shore. The Specification as open to inspection under Sect. 91 comprises also another arrangement shown in Fig. 9 (Cancelled). The beam of light from a point source X2 falling on the mirror galvanometer R is reflected as a spot of light on to a cylindrical mirror N the radius of curvature of which is equal to its distance from the galvanometer mirror. The spot of light is then reflected towards a point axially above the galvanometer R. Two mirrors L, M are arranged so as to make the spot of light move in a vertical plane and the beam to move at right angles to its original direction, swinging about the point g, which is the position of the image of the mirror of the galvanometer R formed by the cylindrical mirror N and the plane mirrors L, M. The mirror of the galvanometer Q is placed at this position g. The vertical movement of the spot of light on the screen K, due to the deflection of the galvanometer R, corresponds to the lumens and the horizontal movement due to the deflection of the galvanometer Q, corresponds to the watts. The position of the spot on the screen gives their ratio. In a modification, the mirrors L, M are placed between the galvanometer R and the mirror N, which is then placed with its axis horizontal, and the beam is reflected by the mirror N to the mirror of the galvanometer Q. This subject-matter does not appear in the Specification as accepted.

9. 发明专利

GB542066A Means for minimising the risk of explosions in tanks, containers, vessels, and the like 未知
公开(公告)号：GB542066A
公开(公告)日：1941-12-23
申请号：GB1502440
申请日：1940-10-08
申请人： JOHN JOSEPH DOWLING
IPC分类号： B65D90/46
摘要： 542,066. Preventing fires in storage tanks &c. DOWLING, J. J. Oct. 8, 1940, No. 15024. Convention date, Jan. 9. [Class 47 (ii)] To minimize the risk of explosions in tanks, containers &c. employed for storing inflammable liquids, due to the generation of electrical potentials on filling, a number of conducting wires C are suspended from the roof of the tank &c. or connected to the roof by eyebolts, and are connected to, or rest against the bottom of the tank &c. Strainers may be used to keep the wires taut. The wires, which are spaced not more than a metre apart, may be arranged at an angle, or horizontal, and instead of wires, wire mesh may be used. In a modified arrangement, the wires or wire netting may radiate from a plate arranged centrally of the tank, their ends being connected to the sides, top and bottom of the tank. Other forms are described in the Specification as open to inspection under Sect. 91 but this subject-matter does not appear in the Specification as accepted.

10. 发明专利

GB269291A Improvements in or relating to wireless receiving apparatus 未知
公开(公告)号：GB269291A
公开(公告)日：1927-04-21
申请号：GB570026
申请日：1926-03-01
申请人： JOHN JOSEPH DOWLING , DESMOND O BOYCE THOMAS MCATEER
IPC分类号： H03J3/00
摘要： 269,291. Dowling, J. J., and McAteer, D. O. T. March 1, 1926. Thermionic amplifiers and detectors; atmospherics and undesired signals, eliminating.-The loading-coils necessary for converting a shortwave receiver into a long-wave receiver are arranged in such a way that interference from short waves and static are eliminated. One loading-coil or coil section L4 is connected in the aerial lead A, and another coil section L3 is connected in the closed grid circuit L1, C, the three coils L1, L3, L4 having a common junction m. For receiving short waves, the coil L4 may be short-circuited by a switch S, and the coil L3 may be shorted or replaced by a shorting-conductor. A reaction coil L2 may be coupled to the coils L1, L3. Fig. 4 shows a trefoil structural arrangement of the coils L1, L3, L4, mounted on a carrier or casing b provided with a plug connection h. One end of each coil is taken to the common junction m and the other ends are led respectively to the earth-plug e , the grid socket g , and the aerial terminal a . The three coils may be wound jointly as a continuous single or multi-layer coil, either in cylindrical, slab, or air-spaced form. Fig. 5 shows such a coil diagrammatically, the continuous winding being cut at the dotted lines z, and re-connected as shown. The coil L4 comprises two adjacent sections in inductive opposition, while the coil L3 has means d for short-circuiting some of its turns adjacent the coil L4.

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