baber/WOPTO huggingface dataset:
Patent GB-782038-A (GB)
Title: Improvements in or relating to transistor amplifiers
IPC: H03F1/34
Filed: 1955-08-19
Abstract: 782,038. Transistor amplifier stabilizing circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 19, 1955 [Aug. 24, 1964], No. 23975/55. Class 40 (6). In a circuit in which the collector of transistor 1 is connected directly to the base of transistor 2, the working-point of the second transistor is stabilized by connecting resistors 5, 6 in the emitter circuit of the second transistor, the junction being connected to the base of the first transistor. Further compensation may be obtained by including a resistor 7, which may be decoupled, in the emitter circuit of transistor 1. The input source 3 may be included in the lead 9 between the base of transistor 1 and the junction of resistors 5, 6. The resistors may be made temperature-sensitive, resistor 6 having a negative temperature coefficient and resistor 5 and/or 7 a positive coefficient. Resistor 6 may be replaced by a diode conducting in the same sense as the emitter of transistor 2. The input impedance may be increased by a feed-back circuit 8, and a resistor may also be included in lead 9 with its lower end connected to the emitter circuit of transistor 1 over a capacitor. The signal source 3 may be connected in series with the voltage across resistor 6.
Patent GB-707605-A (GB)
Title: Improvements in safety razor blade honing devices
IPC: B24D15/10
Filed: 1951-10-19
Abstract: 707,605. Sharpening razor blades. SPENCE, W. L. Nov. 24, 1952 [Oct. 19, 1951; July 15, 1952], Nos. 24389/51 and 17781/52. Class 60 A device for sharpening razor blades has a carrier in two parts A and B between which the blade is gripped and bent and a slider C which engages a part of the carrier with lost motion to raise the leading edge and lower the trailing edge of the blade prior to each stroke when the slider is reciprocated by hand on the surface of a hone. Part A comprises a rib R1, to pass through the slot in the blade and slots T and W in the part B, and a depending portion S1 to form with a slot T2 in the slider C the lost motion drive. It is gripped by the edges of the slot W and may be formed as a die-casting, moulding or, as shown, by a folded strip pressed over an insert. The slider C has end portions N for engagement by the finger and thumb and a lower surface with eased edges to slide over the oil film on the hone. Sharpening pressure is applied by the weight of the device which may be loaded. The rib and slot connection between the parts A and B may be replaced by pins and pin-holes.
Patent GB-1516216-A (GB)
Title: Safety pressure relief apparatus
IPC: F16K17/16
Filed: 1976-09-03
Abstract: 1516216 Bursting discs E ANDREWS and A STEVENSON 3 Sept 1976 [6 June 1975] 24394/75 Heading F1D A bursting disc 1, Fig. 1, has a groove 9 in one surface which provides a line of weakness in which the stresses are concentrated and the arrangement is such that the bursting pressure may be calculated from the dimensions and position of the groove together with the overall dimensions of the disc. As described, the disc is machined from a billet of cured epoxy resin or any brittle solid, e.g. glass, glass ceramics, non-porous ceramics, and the groove 9 is machined to a predetermined depth 10 and an angle of 20 degrees. In an alternative construction; to restrain the central portion of the disc when bursting occurs, one or more pieces of wire are embedded in the disc during moulding. Fig. 5 shows a suitable mould. The wire is surface treated to form a good bond. In a further embodiment, Fig. 4, the groove is provided by a thin foil of non- adhering material, e.g. P.T.F.E., embedded in the disc. Fig. 6 shows an embodiment in which a billet of epoxy resin is cast on to a metallic holder 2 with a circular foil 3 of P.T.F.E. forming the groove. The holder screws on to the pressure vessel.
Patent GB-1098982-A (GB)
Title: Hydraulic reciprocating pumps or motors
Inventor: FLINT JOHN CHRISTOPHER EGLINGT
IPC: F01B3/00
Filed: 1964-06-12
Abstract: 1,098,982. Reciprocating pumps and motors. DOWTY TECHNICAL DEVELOPMENTS Ltd. May 27, 1965 [June 12, 1964], No.24404/64. Heading F1A. To prevent concussion in an axial or radial piston pump or motor comprising a revolving cylinder block 12 engaging a valve plate 22 which is angularly adjustable to vary the output, openings 31 and 32 are provided in the lands between the valve plate kidney ports 45, 46 and communicate with a liquid reservoir 43 formed in the casing or the valve plate, the length of each cylinder port 21 being such that it can momentarily provide overlapping communication between an opening 31, 32 and either of the kidney ports 45, 46 without forming a leakage path between the kidney ports. The reservoir 43 may have resilient walls or a movable, resiliently-loaded wall. A sleeve bearing 26 supporting the drive-shaft 13 and the valve plate 22 has passage means 35, 42 for effecting communication between the valve plate openings and the reservoir in the casing.
Patent GB-1192388-A (GB)
Title: Improvements in Chemical Fraction Collecting Apparatus
Inventor: ALLINGTON JOHN R
IPC: G01N1/18
Filed: 1967-05-26
Abstract: 1,192,388. Conveyers. INSTRUMENTATION SPECIALITIES CO. 26 May, 1967 [27 Oct., 1966], No. 24503/67. Heading B8A. [Also in Division B1] Fraction collecting apparatus comprises two spaced parallel chambers which may be defined by container 10; parallel transfer passageways between the chambers ; a plurality of shuttles A to K, each shuttle being arranged to carry a plurality of fraction containers and having camming surfaces at its ends, the shutters being arranged as shown; means including drive means for moving the shuttles successively through a filling station f or # 1  in one of the passageways, movement of shuttle A for example through one passageway causing by initial co-operation of the camming surfaces on shuttles A and F the lateral movement of shuttles F to K towards the other passageway. The drive means may comprise gears which when the shuttles are in the passageways mesh with gear racks formed along the bottom surfaces of the shuttles (Fig. 3, not shown). The shuttle-moving means may also include hook members (27), (27<SP>1</SP>) at opposite ends of each shuttle, the hook members of two shuttles automatically coupling as the shuttles move into the end-on position and uncoupling when the foremost of the two starts to move laterally. In the embodiment of Figs. 11 to 17 (not shown), oblique surfaces are formed at the inner corners of container 10 and these co-operate with parts of the camming surfaces at the ends of the shuttles as the shuttles move into and out of alignment with the transfer passageways.
Patent GB-598869-A (GB)
Title: Improvements in or relating to metallic gratings
IPC: E04C2/42
Filed: 1945-09-21
Abstract: 598,869. Metallic fabrics. CROSS, E. J. (Tench, J. R.). Sept. 21, 1945, No. 24510. [Class 45] [Also in Group X] A grating comprises members 10 and 12 which are welded together at the points of intersection by pressure electric welding. Initially, the members 12 are oval in crosssection, being at least twice as deep as they are wide, with sharp apices which, when the members are twisted about a longitudinal axis, form continuous spiral edges 15, portions of which extend above the members 10 forming an anti-skid tread. The members 10 comprise flat metal bars set on edge.
Patent GB-1129744-A (GB)
Title: Method of manufacturing cylindrical filter pieces from filter sheets in strip form
IPC: B65B61/28
Filed: 1966-06-01
Abstract: 1,129,744. Tobacco smoke filters. HONSHU SEISHI K.K. 1 June, 1966 [1 June, 1965; 16 April, 1966], No. 24511/66. Heading A2C. A method of manufacturing cylindrical filter pieces from filter sheets comprises the steps of laminating two or more filter sheets in strip form with each pair of adjacent sheets being laterally overlapped over a pre-determined width, folding the resulting laminate into a S- or Z-shaped cross-sectional form, and then compressively winding up the shaped laminate to a cylindrical form. Strips 1 (Fig. 1) are passed through a series of discs 10, 2, 3 and 4 (Figs. 2-5). These discs effect (a) overlapping of the strips and (b) progressive folding of the overlapped strips to S- or Z- cross-section. The progressive folding may be effected alternatively by co-operating rollers, Figs. 6-8 (not shown). The strips are then fed through a tube 8 which compresses them into cylindrical form, an endless belt 9 serving to drive the strips through the tube 8. In a second embodiment, Figs. 9-13 (not shown), the strips are twisted after being formed into S- or Z- cross-section and before being compressed into cylindrical form.
Patent GB-1100515-A (GB)
Title: Improvements in or relating to a rocket launcher
Inventor: CHOATE PAUL VINCENT
IPC: F41F3/045
Filed: 1966-06-01
Abstract: 1,100,515. Rocket launcher. NORRIS INDUSTRIES Inc. 1 June, 1966, No. 24520/66. Heading F3C. A rocket launcher comprises telescopically connected first and second sections, the first section having at one end the breech and being housed, in the inoperative position of the launcher, within the second section. The first section is provided with a rigid member 26 of channel section overlying the second section and, when the sections are extended to the operative position of the launcher, moves relative thereto. The member 26 has attached thereto a spring-loaded latching member 51 which keeps the sections locked either in the inoperative or operative positions of the launcher (Figs. 1, 2, not shown). The first section also includes a firing member 28 comprising a spring-loaded firing pin 29, the firing member 28 being, in the inoperative position of the launcher, connected to the rigid member 26 by a spring latch 34 engaging in apertures in both members and held in position by a sleeve like lock 35. The second section is provided with a firing mechanism which includes a pivoted, spring-loaded trigger 37 associated with a slidable safety device 45 and trigger sears 42. On extension of the two sections the members 26, 28 move together relatively to the second section until a depending stop 51 attached to the second section urges the lock 35 away from the latch 34 and the trigger sears 42 engage laterally projecting shoulders of the firing member 28. Further extension of the two sections causes the rearward edge of the retaining aperture of the member 28 to engage the rearward end of the latch 34 and cam the latch upwardly thus disconnecting the two members. The firing member 28 is thus cocked by the final relatively short movement of the two sections. The safety device 45 when urged away from the trigger 37 in the operative position of the launcher has a portion which is engaged by the latch 34 to lock the safety device in its inoperative position (Fig. 6, not shown). In the inoperative position of the two sections a foresight 55 and a rear sight 58 of the second section are kept in a depressed state against spring loading by the latching member 51 and a housing 18 of the first section.
Patent GB-532358-A (GB)
Title: Improvements in and relating to elastic fluid turbines
IPC: F01D5/22
Filed: 1939-08-26
Abstract: 532,358. Elastic fluid turbines. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 26, 1939, No. 24582: Convention date, Aug. 27, 1938. [Class 110 (iii)] Turbine blades have integral cover portions 15 which abut and are recessed to form a continuous groove 16. Each cover has a central lug 20. Members 22 are inserted under the overhanging edges 19 of the groove and around .the lugs 20. The .lugs .20 are then peened over and the edges 19 rolled down. Alternatively, the .sides of the groove .are left upstanding as at 27, Fig. 3, a single perforated member 25 'is inserted and is secured by peening over the lugs 26 and rolling down the edges.
Patent GB-389091-A (GB)
Title: Improvements in and relating to apparatus for the examination of related sound and picture record films
IPC: G03B31/00
Filed: 1931-09-02
Abstract: 389,091. Rewinding and examining sound and picture films. ALLGEMEINE ELEKTRICITATS-GES., 2, Friedrich Karl- Ufer, Berlin. Sept. 2, 1931, No. 24695. Convention date, Sept. 2, 1930. [Class 40 (ii).] Comprises an apparatus for examining related sound and picture films, having means for unwinding and rewinding picture films and sound films or combined sound and picture films, and in which devices are provided for inspecting the pictures and reproducing the corresponding sounds. The films are wound and unwound on four plates 2, 21, 2<11>, 2<111>, as shown in the Figure, mounted on a table 1 and having spindles 3 which are connected by friction couplings to vertical spindles extending through the table 1, and are provided with pulleys driven by belts from a driving motor mounted on the underside of the table 1. Each pulley is provided with a free-wheel mechanism such that either the plates 21, 2<111> or the plates 2, 2<11> can be driven together, depending upon the direction of rotation of the driving motor. This motor also drives a film feed roller' 12 around which both films are guided, and disposed to one side of the roller 12 are a picture gate 7 and a sound gate 10. The pictures may be inspected through a device 4 which includes' optical means, such as a rotating ring of mirrors, to compensate for the continuous motion of the picture film. The sound gate 10 is provided with an optical system 9 and a casing 11 wherein is housed a light-sensitive cell. The light sources 8, 9 for the picture and sound gates, respectively, may be disposed below the table 1 so that the danger of fire is reduced. When separate sound and picture films are used the picture film is unwound from the plate 2 through the film gate 7 to the feed roller 12 and then wound around the centre of the plate 2<1>. The sound film is unwound from.the plate 2<11> through the sound gate 10 to the feed roller 12 and thence to the centre of the plate 2<111>. The distances from the picture gate 7 and the sound gate 10, respectively, to the roller 12 are made equal. A combined sound and picture film is unwound from the plate 2 through a picture gate 7 over two guide rollers 32, 33 to the sound gate 10 and thence to the feed roller 12 to be wound up on either of the rollers 21, 2<111>. The length of the film between the gates 7, 10 is made equal to the displacement along the combined film of the picture record from the corresponding sound portion. The direction of rotation of the driving motor is controlled by switches 17, 21. A transformer is provided in the circuit of each of the light sources 8, 9, which transformers may be cut out by switches 23, 24 when operating from direct current mains. The light-sensitive cell is connected to an amplifier which may be brought into action by a switch 25.. An illuminating matt glass plate 13 with a scale of picture graduations is used to facilitate the examination of the film.
Patent GB-437988-A (GB)
Title: Improvements in or relating to light-polarising devices
IPC: G02B27/28
Filed: 1934-08-28
Abstract: 437,988. Optical polarizers. REVELEY, P. V., and BAIRD TELEVISION, Ltd., 58, Victoria Street, Westminster. Aug. 28, 1934, No. 24813. [Class 97 (i)] A polarizing prism of the kind in which unwanted light is suppressed within the prism comprises a mass of doubly-refracting material having a plurality of ray-separating interfaces. The prism shown is made up of four triangular prisms 1, 2, 3, 4, which fit together so as to have two plane interfaces which intersect within the prism. The optical axes of the four parts are parallel to each other and parallel to the lightentrance face 6. The interfaces are preferably formed by air films, the triangular prisms being spaced apart by pieces of aluminium foil. The line of intersection of the interfaces is parallel to the face 6 and at rightangles to the optical axis of the prism. The angle 5 is preferably about 37‹ 12<1>, and the two interfaces are equally inclined to the face 6. The finished prism is preferably made of cylindrical form.
Patent GB-866966-A (GB)
Title: Improvements in or relating to linear sweep circuit arrangements
Inventor: MARTINEZ ANTONIO
IPC: H03K4/58
Filed: 1959-07-20
Abstract: 866,966. Transistor sawtooth generating circuits. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. Jan. 4, 1960 [July 20, 1959], No. 24828/59. Class 40(6) In a "bootstrap" type sawtooth generator of the kind in which the voltage across the integrating capacitor is fed to the base of a transistor, and in which the integrating capacitor is charged from a coupling capacitor connected to the emitter of the transistor, the coupling capacitor is provided with a rapid recharging path which excludes the emitter load. In Fig. 2 the integrating capacitor Cl is charged through a resistor RC from a coupling capacitor C2 connected to the emitter of a transistor T2. This transistor is arranged as an emitter follower so that the voltage across the resistor RC and thus the charging current remains constant and a linear voltage increase is thus produced at output terminal O. A negative pulse at terminal will render a transistor T conducting so that the capacitor Cl will be rapidly discharged. The coupling capacitor will recharge through diodes Dl and D2 and through transistor T1. A resistor RX provides a small voltage at the base of transistor T2 at the beginning of the sweep to bias the transistor to a linear operating point. In Fig. 3 the circuit is re-arranged so that the coupling capacitor is recharged through the diode D1 and transistor T2<SP>1</SP>.
Patent GB-151165-A (GB)
Title: Improved means for packing or loading blooms, billets, bars and the like
IPC: B21B39/00
Filed: 1919-10-10
Abstract: 151,165. Piercy, J. W., and Howard, J. R. Oct. 10, 1919. Addition to 116,643, [Class 126, Stoves &c.]. Load, engaging.-In apparatus for packing or bundling together blooms, billets, bars, &c., as described in the parent Specification, the blooms &c. are delivered by positively-driven feed-rollers 5, Figs. 3 and 4, and guide rails 11 to a cage built up in sections and formed by bed members 12 and side members 13. The first section is formed with a clearance groove 14, and other clearance grooves 14 are formed as shown between the other sections to receive the chains &c. for raising the assembled blooms &c. The grooves are of substantially circular section but with an overhanging forward edge 14<a>, Fig. 5, higher than the corresponding overhanging rear edge 14b to prevent the blooms &c. from jamming in the grooves. The first pair of side members 13 has parallel faces 18, the second has diverging inner faces 20, and subsequent pairs have faces shaped as shown at 24, 25 to prevent jamming and also slots 21 to receive the end of a stopper plate 22 provided with a lifting-hook 23. In a modification, a single guiderail 11, Fig. 6, is used, and the blooms &c. are received on a raised platform constituted by sections 26, whence they are deflected by a plate 27, secured to the plate 22, and drop into the cage.
Patent GB-803347-A (GB)
Title: Improvements in or relating to optical systems
IPC: G02B1/111
Filed: 1955-08-30
Abstract: 803,347. Semi-conductor devices. SIEMENSSCHUCKERTWERKE A.G. Aug. 30, 1955 [Aug. 30, 1954], No. 24901/55. Addition to 719,873. Drawings to Specification. Class 37. [Also in Groups XX and XL (b)] An optical system comprises an active optical element consisting of gallium phosphide. The element may be used as a lens, prism, filter, semi-permeable reflector or a photo-modulator. Details are given of the values of the absorption constant and refractive index of gallium phosphide showing that absorption is low over a large part of the visible spectrum, down to 0.54 Á. The values are compared with those for a thallium bromide iodide mixed crystal. The absorption characteristic may be varied by injecting charge carriers (electrons or holes) into the material to provide a photo-modulator. Reflection may be reduced by providing a reflection reducing layer on the element.
Patent GB-656399-A (GB)
Title: Improvements in or relating to the detection of movements by means of a system of stationary acoustic waves
IPC: G08B13/16
Filed: 1947-09-11
Abstract: 656,399. Burglar and like alarms. CHARLIN, A. M. B. Sept. 11, 1947, No. 24989. Convention date, Oct. 1, 1946. [Class 118 (i)] Apparatus for detecting movements in an enclosed space comprises an alarm operated by current derived from the modulation produced by the disturbance created in a stationary field of acoustic waves by such movements. A microphone 3 in the enclosed space to be protected receives sound waves from a loudspeaker 2 energized at an almost inaudible frequency by an oscillator 1. Owing to the reflections from the walls and from objects within the space a field of acoustic standing waves is set up and the amplitude of the microphonic current depends upon the position of the microphone within that field. Any appreciable movement within the space will cause a series of fluctuations in the microphone output, i.e. will modulate the "carrier wave due to the oscillator 1. This modulated output is amplified at 4 and detected at 5, any A.C. component appearing in the rectified output being amplified at 8 and rectified at 9 where it serves to energize a relay 10 and so energize an alarm bell 11. In the absence of any disturbance in the protected space the output of the rectifier 5 is a steady D.C. and no energizing current therefore reaches the alarm relay 10. The output from the rectifier 5 also serves to keep energized an auxiliary alarm relay 6 which if the oscillator or amplifier power supply has been cut, e.g. by a burglar, releases and connects an independent power supply 13 to an auxiliary alarm bell 7. Several oscillator, loud-speaker, microphone systems may be connected to one amplifying and alarm system, switch means enabling each microphone to be isolated in turn in order to determine which is causing the alarm to operate.
Patent GB-281814-A (GB)
Title: Improvements in the control of electrically driven winding engines, hoists and the like
IPC: B66B1/08
Filed: 1926-10-08
Abstract: 281,814. Brooks, E. A. March 21, 1927. Air, washing.-Air cooling, humidifying. and washing apparatus comprises a housing 8 into which air is admitted through a fan casing 11 and discharged through an outlet conduit 43, a water reservoir 5 with a pump 19 for spraying water in the path of the air, and a branch conduit 42 for shunting part of the treated air back through the reservoir to the air inlet. Dampers 44, 45 are provided in the delivery and branch conduits. An air fan 17 is mounted on the power shaft of a rotary motor 18 which also drives the pump 19. A series of overflow pans 49 - - 51 and a perforated gutter 54 are arranged beneath a spray nozzle in the housing, the pans having bottom and side outlet openings 52, 53 to provide superposed water curtains. Water entering the fan casing 11 drains through one or more openings 56. In operation the reservoir is nearly filled through a supply pipe 14 having a floatcontrolled valve 15 and water is supplied to the pump through a primary cup. An elevated tank 23 is first filled and a valve 33 closed whereupon water passes through a refrigerator coil (not shown) to the spray nozzle for recirculation by the pump on return to the reservoir. To prime the pump after a stoppage a valve 27 is opened to supply water from the tank 23.