baber/WOPTO huggingface dataset:
Patent GB-381579-A (GB)
Title: Improvements in and relating to sound emitting devices
IPC: H04R11/00
Filed: 1931-06-23
Abstract: 381,579. Sound - emitting devices. PINTSCH AKT.-GES., J., 71, Andreasstrasse, Berlin. June 23, 1931, No. 18156. Convention date, Aug. 6, 1930. Addition to 375,994. [Class 40 (iv).] To facilitate the tuning of the air space in the sound emitter described in the parent Specification, a ring 5 is disposed between the two diaphragms 3, 4 at their outer edge. Fig. 2 shows the ring 5 fixed to the upper sound emitter. In another modification, Fig. 5, a ring 5 is fixed to each of the two emitters, the rings in this example being shaped to avoid eddy losses. The diaphragm may be conical or convex in shape, and holes may be formed in the rings to drain rain water.
Patent GB-936868-A (GB)
Title: Improvements in or relating to methods of manufacturing photo-electric semi-conductor devices
IPC: H01L31/06
Filed: 1962-05-11
Abstract: 936,868. Semi-conductor devices. PHILIPS ELECTRICAL INDUSTRIES Ltd. May 11, 1962 [May 16, 1961], No. 18216/62. Class 37. A photo-electric semi-conductor device, especially for use in solar cells, comprises a body of semi-conductor material of one conductivity type into which is diffused material of the opposite conductivity type characterized in that the diffusion treatment occurs in two separate stages whereby the thickness of the diffused layer in the portion of the surface to be irradiated is made less than that in the remainder of the surface. The body 1 may be of Ge, Si, GaAs, AlSb, or CdTe but in the embodiment described it is B doped Si of resistivity 0.1 ohm cm. This is heated to 1100� C. in a quartz tube through which oxygen is passed, the oxygen before reaching the body passing over a boat containing P 2 O 5  heated to 220� C. An N-type layer 2, 6� thick, is thereby formed in the surface of the body which is also covered by a transparent vitreous layer 3 of phosphorus silicate. All of the body except its upper surface is coated with a polystyrene resist and is etched in a H.F., HNO 3  bath to remove the N-type layer from said upper surface (which is the surface to be irradiated), the resist being subsequently removed with toluene. A second diffusion treatment follows whereby an N-type layer 5, 0.3� thick, is obtained. An annular ohmic contact 7 of Ag is then attached to the layer 2 and an ohmic contact 8 of Ag containing 2% of Al is attached to the body 1. Contact 8 may be rectifying if it is desired to produce a photo-transistor.
Patent GB-1364412-A (GB)
Title: Parachute with gliding properties
IPC: B64D17/52
Filed: 1973-04-16
Abstract: 1364412 Parachutes BEKLEIDUNGSWERKE SEIFHENNERSDORF VEB 16 April 1973 18248/73 Heading B7G A gliding parachute with a round canopy 1 the apex 3 of which is drawn inwardly by a line 4 connected to the load 5 has a vent 6 provided in the forward part (in the direction of gliding movement) of the indrawn part of the canopy through which air entering the canopy, as indicated by the arrowed line, can flow rearwardly to the exterior of the canopy.
Patent GB-420177-A (GB)
Title: Improvements in or relating to heel tips for boots, shoes and the like
IPC: A43C13/02
Filed: 1933-06-27
Abstract: 420,177. Boot &c. protectors. LANSDELL, L., 33, Elspeth Road, Lavender Hill, London. June 27, 1933, No. 18310. [Class 17 (iii)] A heel tip having a flange b extending over the whole heel and adapted to be secured beneath a filling piece is formed with a curved thickened strip a following the curvature of the heel and extending along the periphery from the breast to beyond the centre of the back. The flap may have canvas reinforcement moulded into the rubber and is trimmed to fit the heel, being secured beneath a filling piece of leather equal in thickness to the height of the portion a above the flap b. The sides of the portion a may be substantially parallel.
Patent GB-928558-A (GB)
Title: Improvements in measuring elements
IPC: G01B3/30
Filed: 1961-05-19
Abstract: 928,558. Measuring length. H. MEYER. May 19, 1961 [June 30, 1960], No. 18391/61. Class 106 (2). To eliminate sag in a long measuring rod supported at two points, the rod is surrounded by liquid the upthrust of which reduces the effects of gravity. As shown in Fig. 3, the measuring rod is tubular and hollow and is formed of two parts, 11 and 21, screwed together and supported by resilient rings 14 in an oil-filled twopart sleeve 12, 22. When the latter is supported on two points 24, it may sag, as shown in Fig. 2, but the measuring rod 8 will not. Relative axial movement of the rod 8 and sleeve 6 is permitted by the resilient supports 7.
Patent GB-150503-A (GB)
Title: Improvements in or relating to apparatus for painting ships or large areas by means of compressed air
IPC: A46B11/06
Filed: 1919-07-24
Abstract: 150,503. Bullock, J. July 24, 1919. Self-feeding brushes.-A self-feeding brush for painting ships or other large areas, or for washing painted surfaces, to which both liquid and compressed air under control are fed at k, has an internal baffle-plate e with perforations f out of alinement with the perforations d between the tufts on the plate b. The closure of the hollow stock is effected by a lined cap h and spring clamp j. The baffle-plate e may be tipped at g for convenience in withdrawing. The brush may be curved for use on large chimneys. According to the Provisional Specification, the bristle-tufts may rest against the baffle-plate, which is clamped to the bottom plate of the stock.
Patent GB-1176748-A (GB)
Title: Process for Polymerizing Gaseous Formaldehyde.
IPC: B01J19/00
Filed: 1968-04-18
Abstract: 1,176,748. Polymerisation apparatus; continuous mixing apparatus. SOC. ITALIANA RESINE S.p.A. 18 April, 1968 [29 April, 1967], No. 18482/68. Headings B1C and B1X. [Also in Division C3] A polymerisation apparatus comprises a jacketed stainless steel tower including a gaseous monomer inlet 1 and a flexible selfcleaning stirrer A, such as a chain, and means for recycling part of the polymer suspension formed through a heat exchanger B via lines 3 and 4. The stirrer may operate cyclically, including periods of rotation in opposite directions with stationary periods therebetween.
Patent GB-1241099-A (GB)
Title: Improvements in or relating to radio position finding systems
IPC: G01S1/30
Filed: 1969-04-10
Abstract: 1,241,099. Radio navigation. SOC. D' ETUDES, RECHERCHES ET CONSTRUCTIONS ELECTRONIQUES. 10 April, 1969 [11 April, 1968], No. 18552/69. Heading H4D. In a radio position finding system, stations A and B respectively radiate on an unmodulated carrier frequency F<SP>1</SP> A  and on a carrier frequency F<SP>2</SP> A  modulated at f B , and stations C and D respectively radiate on an unmodulated carrier frequency F<SP>1</SP> B  and on a carrier frequency F<SP>2</SP> B  modulated at f A ; frequencies F<SP>1</SP> A , F<SP>2</SP>A differ by the low frequency f A  and F<SP>1</SP> B , F<SP>2</SP> B  by the low frequency f B . Frequencies F<SP>1</SP> A , F<SP>1</SP> B  differ by a frequency much greater that f A  or f B . Stations A, B yield one set of hyperbolic isochrones and C, D a second set. The modulation frequency at station B (and similarly for station D) is derived by receiving the signals from stations C and D, filtering out the carrier component from station D, and heterodyning the frequencies F<SP>1</SP> B , F<SP>2</SP> B , Fig. 3 (not shown). At a receiving point, receiving channel 20 is tuned to the frequency band embracing F<SP>1</SP> A  and the sidebands of F<SP>2</SP> A , mixer 21 supplies the beat frequency f A , a detector 13 provides the detected modulation frequency f B , and filters 23, 24 pass only respective frequencies # A , # B ; a similar receiving channel for the band embracing F<SP>1</SP> B  and the sidebands of F<SP>2</SP> B  provides outputs at f A , f B . Phasemeters 30, 31 are fed with the two outputs at f A  and the two outputs at f B  respectively. In an example f A  = 80 Hz and f B  = 130 Hz. The modulation depth is less than unity.
Patent GB-804861-A (GB)
Title: Improvements in or relating to skis
IPC: A63C5/12
Filed: 1954-06-24
Abstract: Skis are manufactured by assembling sections, made from polyester or epoxy resin reinforced with inorganic fibres, round a core and wrapping a thin layer of resin-impregnated fibre round the assembly after which the ski is cured (see Groups V and XV). The material of the sections is preferably such that the resin bonded laminate comprises approximately 40 to 60 per cent fibre and has a minimum tensile strength of approximately 40,000 lb. per square inch.  The fibres are preferably glass but may be other inorganic fibres, e.g. asbestos.
Patent GB-476551-A (GB)
Title: An improved corset stay or busk
IPC: A41C1/20
Filed: 1937-07-05
Abstract: 476,551. Corset stiffeners. BURCKHARDT, E. K. M., and STEEG, F. 0., (trading as BURCKHARDT & CO.). July 5, 1937, No. 18650. Convention date, Oct. 6, 1936. [Class 141] A corset stay or busk a is provided with a drop-shaped ovally roundedoff thickened end b of soft rubber produced by dipping the stay or busk into rubber which is then vulcanized. The rubber may be mixed with a white colouring matter, and the end may also be dipped in lacquer or celluloid.
Patent GB-188709-A (GB)
Title: Improvements in or relating to the electrical transmission or reproduction of sound
IPC: H04R21/02
Filed: 1921-07-09
Abstract: 188,709. Brown, S. G. July 9, 1921. Microphones a n d v a r i a b l e resistance transmitters.-A differential microphone is enclosed with a massive metal casing in direct contact with the cell at both sides. The casing is made up of a number of discs A with a central hole a forming the microphone cell receiving the central plate C or the granules. Each disc A is between a pair of discs B and separated therefrom by insulating layers D. The discs B are recessed to receive carbon plates b which form the microphone walls. The discs A are provided with recesses a<1> and small holes a<2> leading into the cells a for the purpose of filling the latter. The holes a<2> are closed by plates a<3> and the recesses a<1> may be filled with cotton wool. The central plates C are connected rigidly together by a rod c which is also attached to a conical diaphragm E. The screw terminals h are mounted on metal plates h<1> connected to the respective discs B by screws h<2>.
Patent GB-1045343-A (GB)
Title: Reactor for the manufacture of polyethylene phthalates
IPC: C08F2/00
Filed: 1963-05-10
Abstract: In the continuous manufacture of polyethylene phthalates from dimethyl phthalates and ethylene glycol, an apparatus comprising at least five adjacent chambers through which the reaction mixture passes in sequence (see Division B1) is employed, in which the pressure and temperature in the chambers can be independently controlled.  Preferably at least the first of the chambers is employed for reesterification at superatmospheric pressure and the later chambers for the polycondensation at subatmospheric pressure. The temperature may be increased from chamber to chamber in the polycondensation section.  The throughput may be controlled in dependence on the viscosity of the final product.
Patent GB-701199-A (GB)
Title: Needle stripper foot for sewing machines
IPC: D05B29/06
Filed: 1952-07-24
Abstract: 701,199. Sewing-machines. SINGER MANUFACTURING CO. July 24, 1952 [Aug. 31, 1951], No. 18749/52. Class 112 Presser-feet. A stripperfoot 23 replacing the ordinary presser-foot for use in darning is movable in either direction from a neutral position on its support (normally the presserbar 22) and is yieldingly held in this position by a' spring engaging the support and the foot. In the form shown the spring 28 is a helical spring secured horizontally in the presser-bar 22, passing through a slot 30 in the shank 20 of the foot, and engaging a lug 27 on that shank; movement of the foot is limited by engagement of the spring with the ends of the slot. Any movement of the foot required by uneven work is accommodated by the spring, which also allows the foot to yield downwardly if struck by the needle clamp when the presser-bar is raised. Specification 409,642 is referred to.
Patent GB-613636-A (GB)
Title: Improvements in or relating to resilient mountings
IPC: F16F3/10
Filed: 1946-06-22
Abstract: 613,636. Resilient mountings. DUNLOP RUBBER CO., Ltd., and RUSSELL, R. C. H. June 22, 1946, No. 18782. [Class 108 (iii)] A resilient mouriting comprises a block of rubber 6 connected between a load-carrying member 7a and a member 5a upstanding from a base-plate 5, the rubber block being in shear when load is applied in either of two directions mutually at right-angles, and the upstanding member being substantially rigid in those two directions and torsionally resilient in a third direction at right-angles thereto. The base plate 5 may have two upstanding members 5a, each of which carries an extension arm 5b to which is bonded the outer end of a rubber block 6 ; the inner ends of both rubber blocks are bonded to the opposite sides of the load-carrying plate 7a which is of angle form. The base 5, torsion strips 5a and arms 5b may be made of spring steel, or the base 5a and arms 5b may be rigid, only the torsion straps then being of spring steel. The sections and moduli of the torsion strips 5a and resilient blocks 6 are so chosen that the mounting has equal deformations under equal deflectory forces in any direction.
Patent GB-1501934-A (GB)
Title: Clean air diffuser drape
IPC: A61B46/00
Filed: 1975-05-05
Abstract: 1501934 Surgical drape CANADIAN PATENTS & DEVELOPMENT Ltd 5 May 1975 [16 May 1974] 18812/75 Heading A5R [Also in Division F4] A drape 10 having an aperture 11, for providing a clean work area supplied with clean air, comprises an inflatable air duct 12 surrounding aperture 11, the inward wall of duct 12 being in the form of a diffuser 13 of air permeable material, whereby in use, air is supplied to inlets 22 by hoses (not shown) and air diffuses through the diffuser 13 to provide a flow 14 of air inwardly into aperture 11 and a flow 15 upwardly above aperture 11. Aperture 11 is preferably of elliptical shape with the major axis inclined at 22-35‹ (preferably 27‹) to the axis through inlets 22. Diffuser 13 is made of plain weave cotton weighing 5.2 oz/yd and having 50 threads per inch in the warp and 43 threads per inch in the weft. The remainder of duct 12 is of a cotton having 140-180 threads per inch.
Patent GB-1498896-A (GB)
Title: Method of treating knitted fabrics
IPC: D06M101/00
Filed: 1975-05-05
Abstract: 1498896 Mercerizing; finishing fabrics DAIDO-MARUTA FINISHING CO Ltd 5 May 1975 [10 May 1974] 18815/75 Headings DIP and D1S A process comprises feeding knitted fabric containing cotton fibres L, in an open form, into a tank B via a selvage curling preventing expander A and treating with an aqueous solution of alkali hydroxide which may contain a penetrant such as a sodium sulphate derivative of 2-ethyl-1-hexanol or an anionic surfactant, preferably penetrating the solution into the fabric using rollers I to 6 and squeezing the impregnated fabric using mangles 7 and 8 to provide a pick-up of 90%- 120%, shrinking the fabric by preferably 3-15% at 80C-170C for 0.5 to 3 seconds in its longitudinal direction preferably by sending it to a shrinking device E while preventing width shrinking and selvage curling by means of an expander D, the device E comprising a pair of rollers 9 and 10, an endless rubber belt 12 and a drum 11 such that a portion of the surface of the endless belt 12 which makes contact with the top surface of the roller 9 is in the stretched state, while the portion of the belt 12 which makes contact with the surface of the drum 11 is in the shrunken state thereby shrinking the fabric in the longitudinal direction, feeding the fabric to a stenter I, such as a pin tenter, and holding the fabric to a desired width by giving it an overfeed of 2 to 12%, and washing the fabric using a shower device K to remove the alkali hydroxide remaining in the fabric. The concentration of the hydroxide solution to be used is 12%-25% by weight at a maximum temperature of 40C. The hydroxide solution can be sprayed by showers C or coated, or the knitted fabric immersed in the solution. The time spent on the stenter is not more than 1 minute and is usually between 25 and 40 seconds. The fabric may be further washed with hot water and cold water and if it contains large amount of alkali, neutralized with an aqueous solution of CH 3 COOH or dilute H 2 SO 4  and then washed. The fabrics include knitted fabrics made of blended yarns of cotton fibres and synthetic fibres such as polyester, polyamide or acrylic synthetic fibres and interwoven fabrics made of cotton yarns and synthetic yarns.
Patent GB-257244-A (GB)
Title: Improvements in fire extinguishers
IPC: A62C13/00
Filed: 1926-07-28
Abstract: 257,244. Foamite Firefoam, Ltd., (Assignees of Boniface, A. 0.). Aug. 20, 1925, [Convention date]. Fire - extinguishing by foam. - Relates to invertible foam type extinguishers of the kind comprising an outer and an inner container so arranged that upon inversion the solutions therein mix within the upper end of the outer container, and in which a partition defines between itself and the inner container a limited annular flow space for the outer fluid in flowing to the upper end of the outer container; and consists in that the partition 1 surrounds the inner container 2 at a part of substantially maximum diameter, and the inner container is removable through the partition and the filling opening of the extinguisher. The extinguisher is provided with the usual gravity stopple and con. fining cage therefor, and a pressure equalizing pipe 4 for the outer container.
Patent GB-1218258-A (GB)
Title: Flanged structural member
IPC: E04C3/07
Filed: 1968-04-22
Abstract: 1,218,258. Beams &c. DE WENDEL & CIE S.A. 22 April, 1968 [16 June, 1967], No. 18876/ 68. Heading E1K. A structural member such as a beam comprises a web 9 located by and welded along its edge to the inturned converging extremities 3, 4 of an elongate member B folded to define parallel faces 8, 2 forming tubular flanges. A similar member A may be welded to the opposite edge of the web 9. The web 9 may be formed with longitudinally spaced V-formations 12, 13, whilst the edges of the web remain flat for engagemnet between the extremities 3, 4 of the members A or B. The flanges A, B bear on the ends of the V- formations through their faces 1, 2.
Patent GB-408478-A (GB)
Title: Improvements in bust-supports
IPC: A41F1/00
Filed: 1933-07-04
Abstract: 408,478. Brassieres. ROSENBERG, P., 53, Lindenallee, Marienburg, Cologne, Germany. July 4, 1933, No. 18971. [Class 141.] A brassiÞre or bust support is provided with a single continuous strap 4 for the shoulders, said strap being connected to the bust support at the front and at the back being looped through an eye 5 which also serves for side straps 2, 3 fastening at the front by a buckle or other convenient device. The eye, which is made of bone or other suitable material, may be as shown or in the form of a plain ring. An additional eye or eyes may be used for the side straps. Specifications 15149/92 and 109,134, [both in Class 141], are referred to.
Patent GB-1425944-A (GB)
Title: Storage tube erase control
IPC: H04N7/12
Filed: 1972-04-24
Abstract: 1425944 Cathode-ray storage tubes RCA CORPORATION 24 April 1973 [24 April 1972] 19014/72 Heading H1D [Also in Division H4] To ensure complete erasure of the charge pattern on the target 22 of a storage tube the normal Erase mode of operation is preceded by a "hybrid" Erase mode in which the target is maintained at a potential comparable to that employed during the Write mode and the control grid supplied with a bias voltage comparable to that employed during the Read mode. The hybrid mode is initiated by the application of a logical "0" to terminals 82 and 88, the signal at terminal 82 holding transistors 50 and 52 non- conduetive so that the control grid 16 is supplied with a bias voltage of -35 v. from potentiometer 54 (which is also employed for the Read mode) whilst the signal at terminal 88 causes relay coil 84 to be energized to connect terminals A and B together so that the potential of the target substrate 24 is raised to + 200 v. via potentiometer 56 (this potential also being employed during the Write mode). The (unmodulated beam is then scanned over the target for one or two complete frames so that the elements of the target (comprising a coplanar array of silicon dioxide elements 26 on a "P"- type silicon wafer 24) are brought to approximately the potential of the cathode 16. The normal Erase mode is now effected by leaving the logical "0" input at terminal 88 and supplying a logical "1" to terminal 82 so that transistors 50 and 52 saturate thus grounding the cathode 16 and supplying the target with +20 v. from potentiometer 56. The beam is now scanned for about ten frames and since all of the target elements have already been brought to the same potential (the cathode potential) they are all at the same potential at the end of the normal Erase mode. Thus there is little residual charge and background shading of subsequent recorded (written) image information is prevented.
Patent GB-233944-A (GB)
Title: Improvements in rheostats
IPC: H01C10/32
Filed: 1924-08-11
Abstract: 233,944. Stuckey, F. S., and Falk, Stadelmann, & Co., Ltd. Aug. 11, 1924. Variable resistances.- A ring a of ebonite or other insulating material is wound with resistance wire b, leaving a portion of the ring free of wire. To this portion is secured a U- shaped bracket c carrying bearings for a spindle d operated by a knob d<1>. Keyed upon the spindle d is a radial arm e carrying a spring-pressed plunger f which makes contact with the internal surface of the winding b. Terminals are connected to the spindle d and to one end of the winding b.
Patent GB-215228-A (GB)
Title: Improvements in or relating to inner tubes for pneumatic tires
IPC: B60C5/04
Filed: 1923-07-26
Abstract: 215,228. Colby, G. R. July 26, 1923. Air tubes for pneumatic tyres have rows of indentations 6 in staggered relationship which are forced outwards into contact with the outer cover 3 when the tube is inflated, thus putting the rubber into compression, to seal punctures &c. automatically. Reference has been directed by the Comptroller to Specifications 4753/96, 114,769, 173,137 and 178,565.