baber/WOPTO huggingface dataset:
Patent GB-609378-A (GB)
Title: Electric pulse generator
IPC: H03K3/16
Filed: 1946-03-12
Abstract: 609,378. Pulse-generating circuits. HAZELTINE CORPORATION. March 12, 1946, No. 7737. Convention date, March 8, 1945. [Class 40 (vi)] In a generator for producing a number of pulses, a first delay line is responsive to a conductance variation in a valve to apply thereto a delayed control signal to terminate the conductance variation, a second delay line responsive to a conductance variation being arranged to apply to the valve a second delayed signal effective to vary the conductance to recommence the cycle. Valve 10, connected as a blocking oscillator with a transformer 12 in its anode and grid circuits, is normally held non- conductive due to a paralyzing bias, applied to the grid over resistor 14, capacitor 40 and delay line 30. The delay line comprises two sections 33, 35 coupled by an inductor 37, the section 35 being terminated by a short-circuit while section 33 is effectively terminated by an impedance greater than its characteristic impedance. A positive triggering pulse, applied to normally non-conducting valve 20 causes valve 10 to conduct and grid current to flow, a negative pulse being applied to the line 30. The pulse is partially reflected at the end of section 33 as a negative pulse, thus driving the grid beyond cut-off to terminate the pulse generated in the output circuit, and fed to amplifier 41. The pulse in the line 30 is reflected with change of sign at the shorted end of section 35 and after passing back along the line raises the grid potential sufficiently for valve 10 to conduct again and the cycle re-commences. With each flow of grid current, capacitor 40 is charged more negatively and by suitable choice of the time constant, the negative potential acquired by capacitor 40 and grid of valve 10 is made sufficiently great to render the reflected positive pulse ineffective in unblocking the valve after two (or more) pulses have been generated. Switches 44, 45 permit the recurrence rate to be varied. In a modification, Fig. 3 (not shown), the section 33 is connected as an open-ended line across a resistor of its characteristic impedance in the grid circuit of valve 10, the section 35 being connected in the cathode circuit across a resistor of its characteristic impedance. Specification 594,659 is referred to.
Patent GB-246691-A (GB)
Title: Telephone protector and disinfector
IPC: H04R1/12
Filed: 1925-03-23
Abstract: 246,691. Cooney, J., and Cooney, J. March 23, 1925. Sanitary devices.- A disinfecting device of the kind comprising a circular disc of disinfecting material pivotally mounted in a carrier to swing in its own plane in front of the mouthpiece, consists of a member having a base ring B, Fig. 1, which is held in position by the mouthpiece and is furnished with spring arms A provided with points C engaging holes in the carrier D, Fig. 5. The disinfecting material is mounted between wire gauze discs mounted in a rim E which is pivoted to the carrier.
Patent GB-1422963-A (GB)
Title: Electric accessories
IPC: H02G3/14
Filed: 1972-02-19
Abstract: 1422963 Switch covers MIDLAND ELECTRIC MFG CO Ltd 16 May 1973 [19 Feb 1972] 7786/72. Heading H1N [Also in Division H2] The wall mounting plate 10 for an electrical device 12, such as a switch or socket, is covered so as to hide screw holes 10d, 10e, by a detachable decorative member 13, apertured to allow operation of the device. The edges of the cover may be sprung under relieved edges of the plate.
Patent GB-552008-A (GB)
Title: Improvements relating to the manufacture of light-dividing optical systems
IPC: G02B27/10
Filed: 1942-06-09
Abstract: 552,008. Optical systems. TECHNICOLOR MOTION PICTURE CORPORATION. June 9, 1942, No. 7867. Convention date, Feb. 10. [Class 97 (i)] [Also in Group XXIII] In light-dividing systems comprising, e.g. as in Specification 398,339, prisms 1, 2 having abutting faces 3 effecting partial reflection and partial transmission, and used in conjunction with a lens 4, the prisms are adjusted for matching the size of the images R, G, by displacement of one of them along the plane of the faces 3. The prisms may be first cemented together and tested in the camera to determine the necessary adjustment, the cement being then softened, and the prisms mounted with shims in a press as shown in Figs. 3 and 4 for effecting the adjustment and until the cement has again hardened. The press comprises walls 9, 10 adapted to receive the prism 1 with the necessary shims between one of them and the prism, and a slidable block 14 movable between walls 8, 11 and adapter to engage the prism 2. The block may be pressed by a plunger 19 and spring 22, the plunger being mounted in a lug 7, and having a pin 25 which may travel in a slot therein or may engage a face of the lug to hold the plunger in inoperative position. A bar 27, removably held by screws 28, 29, carries a pad in a shoe 32 on a screw 30, to hold the prisms on the base 5. Recesses 36, 37 are provided to prevent damage to the prism edges.
Patent GB-463899-A (GB)
Title: Improvements in photographic cameras with photoelectric exposure meters
IPC: G03B7/04
Filed: 1936-03-16
Abstract: 463,899. Photographic exposure meters. BURGER, M. March 16, 1936, No. 7877. Convention date, April 17, 1935. [Class 98 (i)] The camera or its view-finder is rendered inoperative by means controlled by the current of a photo-electric exposure meter when the light conditions are such as would result in under exposure A flap 3 is mounted in the view finder 2 on a spindle, the other end of which carries a coil 5 in a permanent magnet 4. The coil is in the circuit of the exposure meter and is biassed by a light spring 6, which acts to produce a sudden change in position of the flap when the light conditions are adequate. The current in the cell is influenced also by the factors of exposure, diaphragm aperture &c. In Fig. 3, an armature 10, pivoted at 11 is normally attracted by a permanent magnet 12 against a spring 14 into a position locking the shutter release 15. The photo-electric current flows in coils on the arms of the permanent magnet, and when strong enough, weakens the magnet and unlocks the shutter release. Specification 451,659 is referred to.
Patent GB-727534-A (GB)
Title: Improvements in machines including crushing rollers
IPC: B24B53/07
Filed: 1953-03-24
Abstract: 727,534. Dressing grinding-wheels. DAVIS, Ltd., S., and DARBY, W. Jan. 11, 1954 [March 24, 1953], No. 8020/53. Class 60. A slide 13 carrying a crush-dressing roller (not shown) is reciprocated on a guide 12 by a sinebar 34 adjustably secured to a verticallyreciprocating slide 17. The slide 13 is secured by screws 21 to a block 20 loaded by springs 18 and provided with a pivotally-mounted shoe to co-operate with the sine-bar. The latter is pivotally connected at 35 to the slide 17 and is held by a screw 35a against a gauge piece 41 which may be replaced by one of different thickness to alter the stroke of the slide 13. A cam 25 driven by gearing 28, 29, 30 reciprocates the slide 17 which is loaded by a spring 23.
Patent GB-1197864-A (GB)
Title: Signal Level Detectors
IPC: B60L3/12
Filed: 1969-02-14
Abstract: 1,197,864. Transistor switching and gating circuits. WESTINGHOUSE AIR BRAKE CO. 14 Feb., 1969 [20 Feb., 1968], No. 8044/69. Heading H3T. [Also in Division G1] A fail safe DC voltage level detector comprises a negative feedback amplifier having an A.C. monitoring signal applied to its input and having a D.C. supply derived from the D.C. voltage via a stabilizer including an element which when the D.C. attains a given value has a reduced A.C. impedance which reduces the negative feedback. Thus, if the D.C. signal applied to terminals 1 and 2 exceeds a given value the Zener diode Z1 (or a gas diode) becomes conducting to complete a by-pass path through C2 for the negative feedback resistor R6. Accordingly an appreciable A.C. output is produced at 4 from an A.C. monitoring voltage applied at 3 and this may be rectified to produce a control voltage. It is explained that any likely component failure will produce a safe indication. The D.C. input voltage is obtained by rectifying the A.C. output of a low pass filter of variable cut-off frequency so that an output is obtained if the frequency a signal applied to the filter does not exceed a given value.
Patent GB-1105984-A (GB)
Title: Improvements in and relating to abrasive guns
Inventor: ASHWORTH STEWART IVES
IPC: B24C7/00
Filed: 1966-02-24
Abstract: 1,105,984. Blasting. ABRASIVE DEVELOPMENTS Ltd. 24 Feb., 1966, No. 8084/66. Addition to 1,040,062. Heading B3D. A gun comprises a body 11 in which is formed a feed chamber 12. A nozzle 19 extends through end wall 23 of the chamber, an 0-ring 22 being located between the wall and a flange 21 on the inner end of the nozzle. The flange is engaged by the tapered end 26 of a tube 24 the bore of which forms a mixing chamber 25. The tube 24 passes through a plug 29 screwed into the body 11 and has a flange 27 engaging a sealing ring 28 in the plug 29. The gun may be mounted by means of a bracket 32. A slurry of abrasive and liquid, e.g. water, is drawn by a pump 34 from a sump 33 and delivered through entry 13 into the feed chamber 12. Slurry leaving the chamber through exit 15 and flow restrictor 17 returns to the sump 33. Some slurry passes through a pair of aligned apertures 37 in the tube 24 into the mixing chamber. Air from a pressurized source 38 is supplied through a variable orifice valve 39 and a cut off valve 40 to an inlet connection 31 at the end of the tube 24, so that the slurry is delivered to the nozzle.
Patent GB-1108635-A (GB)
Title: Aziridinyl anthraquinone pigments
Inventor: PIZZARELLO ROY ALOYSIUS
IPC: C09B1/40
Filed: 1965-02-25
Abstract: The invention comprises a water-insoluble coloured anthraquinone pigment of the formula <FORM:1108635/C4-C5/1> where R1 is <FORM:1108635/C4-C5/2> -NHCOCH2CH2Z or -NHCOZ; R2 is <FORM:1108635/C4-C5/3> H, OH or -NHCOCH2CH2Z; and Z is <FORM:1108635/C4-C5/4> Examples describe the preparation of 1-acrylamido-anthraquinone from 1-amino-anthraquinone and acryl chloride, and further reaction with propylenimine to form 1-[2-(2-methylaziridinyl-1)propionamido]-anthraquinone; similar preparation of 1-acrylamido-4-hydroxy-anthraquinone and conversion to 1-[2-(2-methylaziridinyl - 1)propionamido] - anthraquinone; preparation of 1,4-bis-acrylamido-anthraquinone and conversion to 1,4-bis[2-(2-methylaziridinyl-1)propionamido]anthraquinone; reaction of 1-amino-4-hydroxy anthraquinone with phosgene to give 1-isocyano-4-hydroxy-anthraquinone, and reaction with propylenimine to give 1-(2-methylaziridine - 1 - carbonamido] - 4 - hydroxyanthraquinone; 1,4-di-p-toluidino anthraquinone is reacted with chlorosulphonic acid and thionyl chloride to form 1,4-di-(4-methyl-3-chloro-sulphonyl-phenyl)anthraquinone which is reacted with propylenimine to give 1,4-di[4-methyl - 3(2 - methylaziridin - 1 - yl - sulphonyl)-phenyl]amino-anthraquinone.
Patent GB-435114-A (GB)
Title: Improvements in or relating to outlet-gates and receptacles provided therewith
IPC: B65D90/58
Filed: 1934-03-14
Abstract: 435,114. Valves. BLAW KNOX, Ltd., New Oxford House, Hart Street, Holborn, London. March 14, 1934, No. 8107. Convention date, May 24, 1933. [Class 135] [See also Groups XXX, II, and X] An outlet-gate for bins, hoppers, buckets, &c. having bottom discharge openings through which the solid material empties by gravity comprises a unitary closure member consisting of a flexible apron 15 which is brought up against the opening 12 by a swinging abutment built up of a plurality of rollers 21. The rollers 21 may each be in one piece or in two sections with intermediate support and are mounted along an arc on frames 19 pivoted at 20 to the conical hopper 10, and extend across the opening 12, which has two similarly arched sides. The frames 19 are connected by an operating handle 28 secured in the closed position by a latch 29 which can be tripped by a handle 30. The outer end of the apron 15 is hinged to the frames 19 and its inner end to brackets 18 on the hopper 10. Scalloped shields cover the ends of the rollers 21 to exclude the material therefrom. Feet 13 give the frames 19 &c. space to operate, and apertures 14 may be formed in the lower part of the casing to reduce weight &c.
Patent GB-782673-A (GB)
Title: Improvements in or relating to cathode ray tubes incorporating ion trap arrangements
IPC: H01J29/84
Filed: 1954-03-19
Abstract: 782,673. Ion trapping in cathode ray tubes. GENERAL ELECTRIC CO., Ltd., and ALLARD, L. S. March 8, 1955 [March 19, 1954], No. 8119/54. Class 39(1). In an ion trap of a television receiver the cathode 2, Fig. 1, and modulating electrode 4 have a common axis inclined to the axis of one or more gun anodes 9, 15, the magnetic ion trap field being applied in the vicinity of the central aperture 6 of the modulating electrode 4 so as to direct the electrons along the axis of anodes 9, 15, the negative ions being little affected by the magnetic field and being trapped by anode 15. In the form shown the indirectly heated cathode 2 and modulator 4 form a sub-unit supported insulatedly from first anode 9 by steatite or mica collar 8, having depressions 14 to receive bent over tags 13 on anode 9 and engaging two diametrically opposite lugs (not shown) on modulator 4 and annular mica spacer 12 sandwiched between the modulating electrode 4 and metal disc 10 spot welded to anode 9 ; 9, 10 are both of Cu-Ni alloy. The inclination of the cathode, modulating electrode, supports 8, 10, 12 and end of anode 9 is about 70 degrees with respect to the anode axis. The magnetic ion trap deflecting field is produced by one or more permanent or electro-magnets inside or outside the envelope of the cathode ray tube. The electron lens action between the first and second anodes 9, 15 causes the negative ions, already separated from the beam, to be deflected back towards the axis, as shown by the dotted line 23 ; consequently it may be necessary to provide flange 17 to ensure that anode 15 traps all the negative ions. Both anodes can have flanges if desired. The cathode 2 may be supported within modulator 4 by the cup support described in Specification 499,532 [Group XL]. The anodes 9, 15 have flanges 19 attached by metal clips (not shown) to three insulating rods 20. The gun is aligned by two sets of spring fingers 21 welded to flanges 19, and axial movement of the gun electrodes is prevented by wires clamped at one end to rods 20, and sealed at their other ends to the glass pinch. In modifications the gun may have only a single anode or three or more anodes. Focusing and scanning may be effected by electromagnetic and/or electrostatic means. The ion trap gun of the invention minimises positive ion bombardment of the cathode since the positive ions are not substantially deflected by the magnet ion trap field.
Patent GB-1093581-A (GB)
Title: Gearboxes including turbo converters
IPC: F16H41/24
Filed: 1965-02-25
Abstract: 1,093,581. Hydrodynamic torque converters; reverse gearing. C. SHULER-VOITH, M. VOITH, H. W. SCHEPPENHAUSER and C. KNAPP, [trading as VOITH GETRIEBE KOMMGES.]. Feb. 25, 1965 [Feb. 25, 1964]. No. 8235/65. Headings F2C and F2D. In a gear unit for a motor vehicle, including coaxial hydrodynamic torque converters 5, 6 of different characteristics, and a meshed pair of gear-wheels 2, 3 one of which is coaxial with the torque converters, a one-piece main casing 14 includes the stationary reactor blade housings 19 of the torque converters, and the housings for bearings 17, 18 of the gears 2, 3. The input shaft 1 drives, through the gears 2, 3, a hollow primary shaft 4 carrying the impellers 7, 8 of the torque converters 5, 6 the turbines 9, 10 of which are secured to a common output shaft 13 having bearings 16 housed in removable end covers 14a, 14c of the casing. The stator 11 of the converter 5 is carried on a removable bush 14b in which the bearing 17a of the shaft 4 is housed. An oil supply pump 24 is driven from the primary shaft 4 through gears 28, 25-27. The sump 20 and gear cover 21 are of light sheet metal. A control unit (34) (Fig. 2, not shown) for the torque converters is housed in the easing (14), which has flat sides (32, 33) for the connection of further components. The gear unit may include one or more fluid couplings in series with the torque converters. In Fig. 3, two such gear units 40, 41 are mounted side by side and driven from main and auxiliary engines 42, 43 respectively, through dog clutches 45 and 48, 49 respectively. The output shafts of the gear units 40, 41 are geared together by pinions 58-60, of which 58 and 59 are secured on parallel shafts 61, 63 of a reverse gear 56. Gears 64, 65 meshing a common output gear 68 are clutchable to the shafts 61, 63 respectively by sliding dogs 66, 67. A hydrodynamic brake 51 is connected to the output shaft of the gear unit 41.
Patent GB-234235-A (GB)
Title: Improvements in and relating to electric starters for internal combustion engines
IPC: F02N15/06
Filed: 1924-04-01
Abstract: 234,235. Bate, J., and Vandervell & Co., Ltd., C. A. April 1, 1924. Turning-gear.-In an electric starter in which a loose pinion is automatically moved axially into mesh with an engine gear, the pinion a being formed on or secured to a sleeve c cut at the ends to form surfaces c<1>, c<2> co-operating with members d', d<2> on the shaft b, one or both of the members d<1>, d<2> is or are slidable on the shaft b. As shown, the members c<2>, d<2> have curved faces to effect the axial movement and clutch faces for driving the pinion when in mesh with the engine member, and the slidable member d<2> is held in its normal position by a heavy spring e. A lighter spring f retains the pinion a in its normal position. The co-operating surfaces at one or both ends may be given such curvatures that the axial movement of the pinion is effected first slowly and then quickly.
Patent GB-627001-A (GB)
Title: Improvements in or relating to implement retainers for percussive tools
IPC: B25D17/08
Filed: 1947-03-31
Abstract: 627,001. Percussive drills. CHICAGO PNEUMATIC TOOL CO. March 31, 1947, No. 8653. Convention date, Feb. 1. [Class 124] The steel of a power-operated percussive tool having a front head and a collared steel is held by a retainer comprising trunnions attached to front head and directed inwardly in axial alignment with each other, a latching member resiliently mounted on the trunnions, means for locking the latching member in selected positions comprising a plurality of flat surfaces on each trunnion and means on the latching member movable into and out of the path of the collared steel. As shown, a pair of trunnions 26, each provided with two flats 27 and 28, are carried on the front of a tool by carriers 18 and surrounded by a latching member 31 having an aperture 35 accommodating a resilient compressed buffer 39 and a shoe 29 which engages the flats 27 and 28. A yoke 33 partially surrounds the steel 10 which is retained in its position in the tool by co-operation of the yoke 33 and a collar 11 on the steel. The buffer 39 may have a longitudinal hole through it and may be arranged to absorb the shock of the collar hitting the yoke. The shoe may have a flat portion co-operating with the flats on the trunnion, the ends being concave and co-operating with the round portions of the trunnions. A flat 45 on the inner face of the trunnions enables them to be inter-
Patent GB-822876-A (GB)
Title: Improved master cylinder for hydraulic braking installation or the like
IPC: B60T11/224
Filed: 1958-03-18
Abstract: 822,876. Hydraulic brakes. COATALEN, L. March 18, 1958, No. 8682/58. Class 103 (1). A liquid-pressure master cylinder of the type wherein a chamber 2 of the master cylinder in which a piston of larger diameter operates is in communication with the system in which the liquid pressure is utilized, and a piston of smaller diameter, rigid with the piston of larger diameter operates in a smaller diameter extension 3 of the said chamber, and is acted on by the operating member, the space 39 between the two pistons communicating respectively with a fluid reservoir through an aperture controlled by a non-return valve 21, and with the master cylinder chamber 2 through an orifice 30 formed in the layer piston and controlled by a second non-return valve 32, such valve being calibrated to open when a predetermined pressure is reached in the master cylinder chamber, so as to connect the chamber and space together. The first-mentioned non-return valve 21 is adapted to open automatically when the pressure in the space falls below that in the reservoir 13 and is mechanically opened by the larger piston when in its rest position.
Patent GB-195632-A (GB)
Title: Improvements in or relating to presses for highly compressible material
IPC: B30B1/18
Filed: 1923-03-27
Abstract: 195,632. Damman, F. April 1, 1922, [Convention date]. Presses, mechanical.-In presses for fodder, rags and other highly compressible material, the press plate is operated through a friction device to avoid strain. As shown, the press plate is carried by a screw 4 working through a nut 3 furnished with a gear 5 meshing with a gear 6 on a shaft 7 carrying a bevel wheel 8 engaging a pair of bevel wheels 9, 10, adapted to be coupled, alternatively, to a shaft 11 by a clutch 13 controlled by a lever 16. The shaft 11 carries a friction disc 17 with which is adapted to engage a friction wheel 18 carried rotatably by and movable axially along a driven shaft 19. One end of the shaft 19 is carried by a bearing 28 mounted on a lever 24 under the influence of a spring 29 tending to withdraw the wheel 18 from the disc 17. A three-armed lever 31, influenced by a spring 33, carries an adjustable stop 42 adapted to engage, the lever 24 to hold the wheel 18 in engagement with the disc 17, the stop being deflected to release the lever 24 by stops 36, 37, mounted on a rod 38 carried by an arm 39 extending from the screw 4, engaging an arm 34 on the shaft 32 carrying the lever 31. In operation the wheel 18 is moved by a lever 22 to a position near the centre of the disc 17 and the lever 24 is turned to throw the wheel into engagement with the disc, being then held by the stop 42. The lever 16 is next operated to move the clutch 13 into engagement with the wheel 9 causing the descent of the screw 4 and press plate. As the resistance increases, the wheel 18 moves automatically across the disc 17, reducing the speed of the shaft 11. On completion of the descent, the stop 35 engages, through a catch member 40, with the arm 34 to release the lever 24 and disengage the wheel 18. The catch 40 is then turned aside, the lever 16 is operated to thrust the clutch 13 into engagement with the gear 10 and the lever 24 is again operated to throw the wheel into engagement with the disc, causing the press plate to ascent. On completion of the upward movement the wheel 18 is again disengaged owing to the engagement of the stop 37 with the arm 34.
Patent GB-122982-A (GB)
Title: Improvements in Drawbars for Attaching Farm Implements to Tractors.
Inventor: MILSTED ALBERT
IPC: A01B59/042
Filed: 1918-05-27
Abstract: 122,982. Milsted, A., and Judge, W. H. May 27, 1918. Couplings for tractors.-A draw-bar for attaching farm implements having shafts to tractors has hooked portions B for hooking to the shafts F, eyes C through which a. pin D is passed, and eyes K at the front through which a bolt L is passed to secure the draw-bar to the attachment M of the tractor. The pin D also passes through the eyebolts E on the shafts.