baber/WOPTO huggingface dataset:
Patent GB-871025-A (GB)
Title: Improvements in or relating to photographic shutters
IPC: G03B9/64
Filed: 1957-09-30
Abstract: 871,025. Photographic shutters. GAUTHIER G.m.b.H., ALFRED. Sept. 30, 1957 [March 23, 1957], No. 30587/57. Class 98(1) A photographic shutter is provided with a shutter speed escapement mechanism consisting of a wheel-type escapement controlled by a pallet-type escapement engageable therewith, the latter escapement having two pallets independently engageable under the control of a shutter speed setting member to give a multi-stage escapement range. As shown, a setting and master member 4 is pivotally mounted on the shutter baseplate 2, and engages the shutter blade ring in a known manner not shown. A lever 5, pivoted at 6, actuates the escapement mechanism extending to the left of this member, and one arm 5a engages a lug 4a on the member 4. The other arm 5c of the lever 5 is connected by a pin and slot with a toothed segment 9 rockable at 8 and engaging a toothed wheel 12, which in turn engages a further toothed wheel 13 which engages a pallet or anchor wheel 14 -this coupling of the wheels being by means of attached pinions 15, 16 and 17. To be selectively disengaged from the wheel-type escapement consisting of wheels 12 and 13, the pallet wheel 14 is mounted on the arm 28a of a bell crank lever 28, pivotable about the stud 30 and under the action of the spring 30 which tends to urge the wheel 14 into engagement with the wheel 13, which engagement is effected by the rotation of a shutter speed setting ring (not shown), a slot of which is engaged by the projection 38c of a lever 38 which is operatively connected with the bell crank lever 28. The lever 38 is mounted on the plate 32 of a pre-timer mechanism. Escapement pallets 18 and 19 of different weights are each mounted on separate levers 20, 21 to bring them selectively into and out of engagement with the pallet wheel, the levers being rockably mounted under the action of springs 24 and 25. The selective engagement of the pallets with the wheel 14 is similarly effected by the engagement of lugs 20, 20a with suitably shaped slots in the rotatable shutter speed setting ring and also the lever 5 may be moved out of engagement with the wheel escapement mechanism by engagement of a pin 31 in a further slot in the setting ring. Thus, six different shutter speeds are obtainable by rotation of the shutter speed setting ring bringing into and out of operation selectively the various escapement parts, each shutter speed involving the same path of motion of the driving member 4. The pallets become disengaged after exposure by coacting with an element on the shutter blade ring in known manner.
Patent GB-341084-A (GB)
Title: Improvements in or relating to telegraphic receivers and retransmitters
IPC: H04L25/20
Filed: 1929-10-09
Abstract: 341,084. Code telegraphy. CREED & CO., Ltd., CREED, F. G., and SALMON, R. D., Telegraph Works, Croydon. Oct. 9, 1929, No. 30624. [Class 40 (iii).] The invention relates to mechanism for preventing the reproduction or retransmission of a false signal on account of distortion of the received signal. The armature 10 of a polarized relay (not shown) is operated by a received signal to move through a resilient link 11 the end 8a of a rod 8 into an operating position with respect to one of the pivoted levers 12, 13 normally held by springs 14, 15 against adjustable fixed contacts 16, 17. The rod 8 is moved longitudinally by a cam roller 9 engaging a cam 7 on a cam sleeve 5 which when released is frictionally driven by a spring pad 6 from a shaft 1 driven by friction gearing 3. The armature 22 of a non-polarized relay (not shown) has a detent 21, engaging, in its non-operative position, a tooth 20 on a cam sleeve 4 frictionally coupled by a spring pad 6 to the shaft 1, and intercepting at its end 21a a lever 25 fixed to a rotatable shaft 29, and pressed by a spring 22 against a cam 23 mounted on the sleeve 5. Rigidly secured to the shaft 29 is a member 28a against which a member 28 is pressed by a spring 28b. The cam 23 has a notch 24 adjustably fixed with regard to the tooth 20, and on actuation of the armature 22, the detent 21 is disengaged, and notch 24 is rotated into engagement with a step 26, with consequent slight rotation of the shaft 29. The rod 28 is thereby rocked out of engagement with a tooth 30 formed on the cam sleeve 5, and cam 7 rotates to operate through the rod 8, the selected rod 12 or 13 to bring its end against one of the contacts 18, 19, which operate to reproduce or retransmit a signal. Should a received signal be distorted so that the armature 22 is not released in time to engage the tooth 20, provided that the armature is released before the notch 24 rotates into engagement with the step 26, the lever 25 will be prevented by the end 21a of the detent 21 from rotation, and the rod 28 will not be rocked out of engagement with the tooth 30. The cam sleeve 5 will be held against rotation. the rod 8 will not be actuated, and no signal will be reproduced or retransmitted.
Patent GB-666468-A (GB)
Title: Improvements in tennis and like inflated balls and method of making same
IPC: A63B39/06
Filed: 1949-11-30
Abstract: 666,468. Balls for games. DUNLOP RUBBER CO., Ltd., ANDERSON, J., and GOY, R. S. Oct. 16, 1950 [Nov. 30, 1949], No. 30693/49. Class 132 (ii). A method of making a textile covered ball e.g. a tennis ball comprises covering an inflated core 4 with a single thickness of composite yarn made up of a central thread 2 and a helical winding of wool 3 or feltable fibres, effecting adhesion of the yarn to the core and raising and felting the covering on the core to form a felted surface 6. The core 4 is first covered with an adhesive layer 5 and then wound with the yarn from pole to pole. The core is then heated in a mould to effect adhesion of the cover and melt the central thread 2 of cellulose acetate. The yarn is then raised by a wire brush or in a tumbler having razor blades set therein and the cover is felted in known manner. The ball is washed and treated with polymethyl methacrylate and given a final moulding, the mould marks being removed by steam. In modifications, each hemisphere of the core may be covered by a separate length of yarn or four square panels of yarn may be used; the central thread may be made of sodium alginate, which is dissolved during felting, or of wool; before application to the core, the yarn may be wound on a cylinder, subjected under steaming to end pressure to give it a square cross-section and coated on one face with adhesive.
Patent GB-176297-A (GB)
Title: Improvements in cameras
IPC: G03B19/02
Filed: 1920-09-24
Abstract: 176,297. Carpmael, W. P., (Crown Cork & Seal Co.). Sept. 24, 1920. Enlarging, copying, and reducing; dark slides. -Relates to photographic cameras of the step and repeat type, more particularly adapted for use in the preparation of photographic plates in connection with the production of lithographed articles stamped or punched from tin plate, and comprises means by which unit designs can b& positioned exactly on the plate. The apparatus shown consists of a framework 15, on which are mounted a plate-holder 54 movable across the axis of the lens in two directions, and adapted to be locked in any one of a number of predetermined positions, a light tight sleeve 72 between the plate-holder carriage and the lens mount, a lens 78, a shutter 96, an object-holder 19, and light projectors 81, 82. The plate-holder is supported on a wheeled carriage 49 mounted on tracks 48 on a lower carriage 40, which in turn moves on tracks 45 at right angles to the tracks 48. The carriage 49 has upturned sides 68 supporting a plate 121 having mounted therein a number of coned sockets 123 adapted to receive a positioning-pin 124 carried by a portion 17 of the camera frame. The pin is pressed downwards into a socket by a spring, and can be raised to release the plate-holder carriage by a lever 129 and cam 127. Preferably each plate 121 has two sets of sockets corresponding with two different arrangements of design, and a socket pin 124 is provided for each set. Pointers 134 on the plate-holder carriage and indicator plates 132 show the particular position in which the plate is located at any time. The plate-holder has a hinged back and a removable sliding shutter, and the plate is accurately positioned by means of the stops 63 and the spring-pressed lever 64. The light-proof sleeve 72 between the plate-holder carriage and the lens mount is secured at its upper end to a flange 71, and above this flange is a plate 75 having apertures arranged to correspond with the arrangement of the design on the plate. The lens is mounted on a shouldered bushing, which is machined away until the exact focal position is obtained. The object-plate 18 is held between yielding rings in a holder 19, consisting of upper and lower members resiliently hinged together, and fitted with a resilientlymounted clamping-device. The holder makes a sliding tongue and groove connection with a mounting 30, and this is adjustably held in a cylindrical support 37 by a bolt 38. Preferably, two light projectors 81, 82, at different distances from the object, are provided, and these are mounted on a sliding base 85 having notches 91 with which engages a locking-block 90 when one or other of the projectors is in operative position. The shutter 96 is operated by a pendulum in the manner described in Specification 174,677.
Patent GB-171706-A (GB)
Title: Improvements in or relating to screw propellers for flying machines of the helicopter type
IPC: B64C27/54
Filed: 1921-11-21
Abstract: 171,706. Pateras Pescara, Raul, Marquis of. Nov. 20, 1920, [Convention date]. Screw propellers.-Means are provided for altering the angle of attack of the whole or of a portion only of the surface of each of the blades of two contrary-turning propellers, mounted one above the other on a vertical shaft, either cyclically or at desired intervals by equal amounts in the same or in opposite senses. A lever 83, Fig. 6, moves a guide 78, connected by rods 81, 82 to guides 79, 80, secured to ball bearings 76, 77 which carry connecting-rods 74, 75 and actuate cables 18 through sleeves 73 in tube members 58 of the bosses. These cables 18 transmit equal pulls to lever pinion segments 19, 20, 21, 22 mounted on a stay 16, Fig. 5, in each propeller blade, and turn screw racks 26, Fig. 4, secured rigidly, by collars to the tube 15 and stay 16, to adjacent elastic ribs 13 of the blade, which has a flexible covering of varnished canvas or aluminium. Considerable twisting of the blades of both propellers in the same direction results when the lever 83 is operated. In order to obtain more delicate control of the machine, similarly operated means are provided for changing the angle of attack of a small portion only of each blade. A hand-wheel 61 raises or lowers through a screw 90, inside the tube 46, a rod 59 provided with a universal joint 60, and by means of this rod, ball-and-socket joints 62, 63, operate cables 31 attached to a guided slide 72, through the connections 64, 65 &c. The cables 31 pass through the stays 16 into the propeller blades and warp, by equal and opposite amounts, small portions of these blades by means similar to those already described. By inclining the rod 59 about the joint 60 across the normal axis of revolution, the bearings 66, 67 become eccentric to the axis of revolution and the angles of attack of corresponding portions of the blades are equally and oppositely affected. By arranging the connections 68-70, 69-71 parallel to one another, instead of in the direction shown in Fig. 6, the changes in sense of the angle of incidence of the blades may be made in the same direction.
Patent GB-465701-A (GB)
Title: Method of producing an extremely thin film of cellulose ester or the like
IPC: B29C41/36
Filed: 1936-11-13
Abstract: Extremely thin films of cellulose ester or the <PICT:0465701/IV/1> like are prepared by applying a thin solution of the film material from a roller W provided with fine engravings or roughnesses, to a smooth travelling support B on which it coalesces to form a uniform layer.  Coalescence of the film material may be assisted by a smooth roller St.
Patent GB-941497-A (GB)
Title: Storage apparatus for fluids
Inventor: SNELL LEONARD STANLEY
IPC: B64D37/20
Filed: 1961-08-29
Abstract: 941,497. Storing liquefied gases. DE HAVILLAND ENGINE CO. Ltd. Aug. 29, 1962 [Aug. 29, 1961], No. 31125/61. Heading F4P. [Also in Division F1] A liquefied gas, e.g. oxygen, container 1, Fig. 1, is divided by a readily and permanently distortable bag or diaphragm 10 of metal foil unaffected by the liquid oxygen, e.g. stainless steel, into a first oxygen containing compartment which initially is almost equal in volume to that of the container 1 and into a second small compartment to which pressurized fluid is admitted through an inlet 2, thereby collapsing the bag 10 to effect discharge of the oxygen through a perforated tube 5. The outer end of the latter is welded at 6 to a disc 7 to which is secured the edge 11 of the bag 10. In a modification the edge of the bag is welded direct to the perforated tube. In a further modification the bag 32, Fig. 6, is of corrugated form which on application of pressure fluid admitted through an inlet 28 collapses concertina-fashion to discharge oxygen through, an outlet 31. In a further modification, the pressurized fluid is admitted through bores in the container wall.
Patent GB-229794-A (GB)
Title: Improvements in and relating to the reception of wireless and other signals
Filed: 1923-12-11
Abstract: 229,794. Hettinger, J., and Vandervell, C. A. Dec. 11, 1923. Addition to 130,368. Non - thermionic amplifiers; atmos pherics and unde sired signals, elimi nating; tone or group frequency tuning arrangements; multi plex signalling.-Optical receivers fo: wireless and other signals, of the kind d'escribed in the par ent Specification, are modified by interposing a magneto-microphonic amplifier between a signal-receiving circuit and the circuit of the incandescent lamp indicator. In Fig. 2, the microphone c is actuated electromagnetically by a coil C in a signal-receiving circuit. The microphone c is in circuit with a battery b and an incandescent lamp or wire a. A variable resistance or inductance may be shunted across the microphone. The current through the lamp may be supplemented by a separate battery in series with an inductance f and a variable resistance g. The lamp is normally kept brightly incandescent, and the received signals reduce the incandescence, so that when photographically recorded as described in Specification 186,665 the signals show a lighter shade than the spaces. In the modification shown in Fig. 3, the lamp is included in a circuit comprising a condenser i and a variable inductance h of low resistance, this circuit being tuned to the signal frequency. In this case, the microphone variations increase the incandescence of the lamp, and this is augmented by the resonance current in the tuned circuit. For eliminating interference in wireless signalling, or for simultaneous reception of two messages by the heterodyne method, the arrangements are duplicated, and the input of each microphone amplifier is connected through a transformer to the last stage of valve amplification. The transformer primaries are connected in circuits tuned to different low frequencies. For simultaneous reception, one lamp indicator responds mainly to one wave-length and the other to another. Interfering signals or atmospherics affect both lamps, as described in the parent Specification.
Patent GB-1509189-A (GB)
Title: Ionisation detectors
IPC: H01J41/08
Filed: 1975-08-08
Abstract: 1509189 Radio-active sources ANALYTICAL INSTRUMENTS Ltd 8 Aug 1975 [13 July 1974] 31141/74 Heading G6R A beta particle-emitting radio-active source for use in an ionization detector comprises a radio-active tritiated carrier coated with a thin layer of a low density material -which is non- radio-active and is not affected by radiation from a radio-active source. The carrier may be a layer of titanium supported on a copper or stainless steel foil. The coating material may be aluminium of thickness less than 1 micron. In the detector shown, the radio-active source 6 is in the form of a cylindrical sleeve arranged between electrodes 1, 2, gas being introduced at 4 and leaving at 5. The coating reduces the energy of the beta particles emitted and also reduces tritium loss at elevated temperature.
Patent GB-383058-A (GB)
Title: Arrangement in electric induction furnaces without a closed ferro-magnetic circuit
IPC: H05B6/24
Filed: 1931-11-10
Abstract: 383,058. Electric induction furnaces. ALLM€NNA SVENSKA ELEKTRISKA AKTIEBOLAGET, Võsteras, Sweden. Nov. 10, 1931, No. 31143. Convention date, Aug. 29. [Class 39 (iii).] In.a furnace without a closed ferro-magnetic circuit the winding 2 is surrounded by a ferro-magnetic shell 3 and annular ferromagnetic plates 4 are inserted between the turns of the winding to conduct the flux between the shell and the surface of the charge.
Patent GB-470487-A (GB)
Title: Improvements in and relating to spanners and spanner levers
IPC: B25G1/04
Filed: 1935-11-12
Abstract: 470,487. Wrenches. McGRATH, M. B. Nov. 12, 1935, No. 31229. Void. Convention date, Dec. 10, 1934. [Class 61 (iii)] A spanner 10 is provided with lugs 12 adapted to be engaged by a lengthening lever 12a, or the lugs may be on the lever for engagement with a plain spanner. Or the spanner 10 may be provided with pins 13, Fig. 2, or holes 14, Fig. 3, or notches 15, Fig. 4, for engagement with complementary holes or pins on the lengthening lever. Detachable lugs 20, Fig. 9 may be applied in pairs to either the spanner or lever.
Patent GB-470151-A (GB)
Title: Improvements in or relating to machines for grinding, honing or polishing razor blades
IPC: B24B3/48
Filed: 1936-11-16
Abstract: 470,151. Feeding razor blades for grinding &c. TREIBER, J. Nov. 16, 1936, No. 31243. Convention date, Nov. 15, 1935. [Class 100 (i)] A device for placing flexible razor blades on the endless conveyer band of a grinding, honing, or polishing machine comprises a container 1 in which the blades 4 are piled under a weight 14, the container having a hinged front secured by a screw-and-nut. The lowermost blade rests with its edges on the raised surfaces 5 of a guide 6 for the conveyer band, the surfaces 5 being inclined forwardly of the centre of the blade, so that this may be bent by the action of suction applied by a hole 11 in the base 10, and holes 12. The bending of the blade causes the front hole in the blade to engage a corresponding stud 7 on the band 8, so that the blade is moved out of the container and drops flat on the band with its other holes also engaged by studs 7.
Patent GB-1259997-A (GB)
Title: Method and device for modulating or stabilizing a neutron flux obtained from an ion accelerator
Inventor: PIERSON ALEXANDRE
IPC: H05H3/06
Filed: 1969-06-20
Abstract: 1,259,997. Unijunction transistor oscillators. COMMISSARIAT A L'ENERGIE ATOMIQUE. .20 June, 1969 [28 June, 1968], No. 31243/69. Heading H3T. [Also in Division G1] A clock circuit uses differential amplifier 19 receiving on input 18 either a constant voltage or one ranging according to a particular law e.g. sinusoidally and from 20 a mean level. Amplifier 19 feeds a current generating differential amplifier 21, provided with negative feedback, which charges capacitor 22, a clock pulse being emitted when the voltage on the capacitor turns on a unijunction transistor 23 to cause discharge of the capacitor.
Patent GB-906444-A (GB)
Title: Improvements in or relating to apparatus for delivering materials from vehicles
IPC: E01C19/18
Filed: 1959-09-14
Abstract: 906,444. Road-laying machines. JOHNSTON BROS. (CONTRACTORS) Ltd., and BONE, A. B. Dec. 1, 1960 [Sept. 14, 1959], No. 31286/59. Class 107.  Apparatus for delivering material on to a road comprises a tipping body on a motor vehicle with rigidly fixed thereto a hopper provided at the end remote from the tipping body with at least one roller and a driving transmission on the hopper for driving the roller(s) in such direction that a part of the roller which engages the material to be distributed is moving downwardly. As shown, Fig. 1, a hopper comprising plates 15, 16, 17 and having an elongated discharge opening 18 is mounted on the tipping body 9 of a vehicle by means of a frame 12. Members 19 rigidly secured to the side-plates 15 support for vertical and transverse adjustment roadengaging wheels 27. A guide roller 46 is mounted on a shaft 46 indirectly supported by the members 19. A further roller 68 mounted on a shaft 66 and associated with the lower edge of a pivoting extension of the plate 16 is adjustable relative to the roller 46 by movement of the shaft 66 along guide slots 69 in the plates 15 to vary the discharge opening 18. In operation, rotation of the wheels 27 rotates the rollers 46 and 68 through chain-and-sprocket arrangements. Both rollers may carry helical or longitudinal continuous or interrupted ribs. A feedshaft 48 bearing tines 49 is rotatable by means of a cranked handle 53 or a further chain-andsprocket arrangement (not shown). A curved delivery plate 78 is pivoted at 6 to the plates 15 and is vertically adjustable by means of cables 79 wound on drums 82 rotatable by wheels 87. The height of a scraper blade 93 is adjustable by means of a crank handle 97. Motor drive means may be substituted for the wheel drive shown.
Patent GB-1278775-A (GB)
Title: Light-sensitive photographic material
Inventor: HOEFNAGELS JAN ANTONIUS
IPC: G03C1/685
Filed: 1968-07-01
Abstract: 1278775 Photographic materials AGFAGEVAERT N V 16 June 1969 [1 July 1968] 31308/68 Addition to 1222071 Heading G2C [Also in Divisions C2 and C4] A light sensitive photographic material capable of forming dark stabilized coloured images comprises a photo-hardening polymeric system and a photochromic dispuropyran corresponding to the formula where R is -(CH 2 ) n -O-(CH 2 ) n - or -(CH 2 ) n  or -CH 2 -CH=CH-CH 2 - and n is an integer from 1 to 8. X and X<SP>11</SP> is H, Cl or Br, a nitrile, acetyl, carboxy hydroxy, nitro or methoxy group. X<SP>1</SP> is H, Cl or Br a nitrile, acetyl, carboxy or nitro group and X<SP>111</SP> is H, Cl, Br or a nitro group. The material is coated on metal and glass plates, cellulose ester, polystyrene and polyester films and paper. The photo-hardenable polymers are polyvinyl innamate and polymers containing arylazido, azidocarbonyl, azidosulphonyl, coumarin, quinone diazide and 1, 2, 3 - thiadiazole groups disclosed in Specifications 1115427, 1089095, 1087416, 1082195, 1074234, 1062884, 1118215, 1129907 and 1136544.
Patent GB-467068-A (GB)
Title: Improvements in and relating to mercury and like conducting-liquid electric switches
IPC: B60B25/08
Filed: 1936-11-16
Abstract: 467,068. Mercury and other conducting liquid switches. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 16, 1936, No. 31312. Convention date, Nov. 15, 1935. [Class 38 (v)] A mercury switch comprising two metal end caps separated by an insulating diaphragm with a hole through which mercury passes in the " on " position, is rotatably mounted in a housing between two contacts 35 which have projecting portions engaging depressions in the caps and serve to conduct the current to the caps. Spring strips 45 press on the switch causing good contact between the contacts 35 and the caps. They also engage depressions to determine the " on " and " off positions of the switch which is operated by a handle 40. The strips 45 and contacts 35 are connected to hollow rivets 49 and in assembling the rivets 49 are placed over inserts 50 the projecting ends of which are then spun over. The switch is shown combined with another similar switch which it drives through gearing, the complete arrangement functioning as a double pole or a two-way switch. Four switches may also be combined together to form a reversing switch operated by one handle, Figs. 12-15 (not shown). Specification 466,258 is referred to.