baber/WOPTO huggingface dataset:
Patent GB-180535-A (GB)
Title: Improvements in door latches
IPC: E05C1/14
Filed: 1921-04-29
Abstract: 180,535. Sleigh, H. L., and Cheston, A. S. April 29, 1921. Laches, sliding.-In a door latch for motorvehicles &c., the operating-lever 6 passing through slots in the latch casing and bolt and pivoted between lugs 10, Fig. 3, on the spring-pressed latch 2, is formed with a concave portion 8 which engages and fulcrums about one end of the slot 5 in the casing when the lever is operated to withdraw the bolt. The slot 5 may be provided with an antifriction roller. As shown in Fig. 5, the lever 6 is detachably pivoted to the latch by the engagement of its hook portion 14 with a transverse pin 15 on the latch, its concave portion 8 bearing against a projection 30 on a slotted plate 25 detachably secured over the slot 5. When the door is slammed, the pin 15 moves in a slot 16 in the lever which is itself held in the position shown by a spring-pressed plunger 17, a projection 20 on which engages a projection 21 on the latch casing to prevent the plunger being moved too far forward when the handle is detached. The latch may be operated from the outside by a follower 28 acting on a projection'31 on the latch. The Provisional Specifications state that the handle 6 may operate with a push instead of a pull action.
Patent GB-165286-A (GB)
Title: Improvements in or relating to magazine crayon holders
IPC: B43K24/14
Filed: 1920-05-04
Abstract: 165,286. Brookes, N. E., (Goodwin, A.). May 4, 1920. Pencil and like holders.-In a magazine crayon-holder of the type in which a mnlti-coloured compartment magazine is rotated relatively to lead-gripping jaws eccentric to the axle of rotation, interlocking elements on jaws and magazine controlling their relative position, the axle member comprises a rod 17 secured to a member 12 carrying the lead-gripping jaws 13 and extending through the magazine 6 beyond its upper end, a spring 19 preferably being interposed between the upper end 9 of the magazine and a stop 18 at the end of the rod 17. A rigid lug projecting from the member 12 engages notches on the lower edge of the magazine 6 so that the jaws 13 may be brought into alignment with any of the magazine compartments, or, when the holder is out of use, into an intermediate position not in alignment with any of the compartments. A cap 8 secured to the upper end of the magazine and concealing the end of the rod 17 and the spring 19 has angularly-disposed faces 10 to prevent rolling of the holder. The magazine 6 may comprise a number of tubes held together at their ends in circular ferrules.
Patent GB-435324-A (GB)
Title: Improvements in playing courts, paths and the like
IPC: C09K17/40
Filed: 1934-04-25
Abstract: A tennis court, path, or the like is provided with a layer comprising an aggregate of ground wood, ground cork, ground rubber and sand, held together by a binder of oil, with either resin or a resinous substance.  Suitable proportions for the materials of the aggregate are 50 parts by volume of sand, 4 parts of cork, 1 part of rubber, and 4 parts of wood dust.  If desired, the aggregate may comprise 10 parts of sand and 40 parts of crushed stone.  The binder may comprise 10 parts by volume of linseed oil and 4 parts of resin (preferably American resin).  The aggregate is added to the heated binder in the proportion of 18 parts by volume of aggregate to 1 part of binder. The ground wood may be pre-treated with linseed oil.  The layer may serve as a cushioning layer for a top course, which comprises similar materials to those of the cushioning layer, but of finer texture.
Patent GB-584251-A (GB)
Title: Improvements in or relating to apparatus for measuring high frequency voltages
IPC: G01R5/28
Filed: 1941-09-25
Abstract: 584,251. Electrostatic meters. CORK, E. C. Sept. 25, 1941, No. 12411. [Class 37] An instrument for measuring high-frequency voltages comprises a pair of conductors forming a high-frequency transmission line and a conducting leaf attached to either conductor and so arranged that when a high-frequency current is caused to flow along the transmission line the leaf will be deflected to an extent dependent on the potential difference between the conductors in the region of the leaf. A length of coaxial transmission line 1 comprises outer and inner conductors 1a, 1b, arranged vertically. A longitudinal slit is provided in the outer conductor 1a and suspended in this slit on a horizontal axis is a gold leaf 3 electrically connected to the outer conductor 1a. This outer conductor is supported in a metal block 4 which is mounted in a guide 5 carried on the end of a sleeve which is mounted on a vertical pillar 7. The block 4 is adjustable transversely of the pillar 7 by means of a screw 8. The leaf 3 is carried by an arm 11 projecting from a plate 12 which is attached to the block 4 by screws. The displacement of the leaf 3 is observed through a hole 13 by means of a miscroscope. The upper end of the concentric line 1 is provided with a short circuiting piston surrounded on the outside of the outer conductor by a clamping collar 19 whereby the piston can be maintained in good electrical contact with the inner and outer conductors of the line 1. The piston is carried by a sleeve 20 connected to a cross-bar 21 which is joined to the collar 19 by rods 22. The voltage to be measured is applied to the lower end of the transmission line by means of a concentric cable 26. At the lower end of the transmission line 1 is a short-circuiting piston contacting with the inner surface of the outer conductor and the outer surface of the inner conductor and having a skirt 27a projecting beyond the lower end of the transmission line and formed so as to be connected-to the outer conductor of the cable 26. The inner conductor of the cable passes through a bore in the piston and is connected to the inner conductor of the transmission line at a distance from the leaf 3 equal to a quarter or three-quarters of the wavelength of the voltage to be measured. The piston is adjustable for impedance matching. The effective length of the transmission line 1 and the cable 26 is adjusted to be an integral multiple of a half wavelength so as to produce minimum disturbance in the circuit being investigated. A crystal detector or other device to be calibrated may be mounted in a holder 34 screwed into the block 4 so that its probe 35 projects through a hole 33 in the transmission line and is capacitatively coupled to the inner conductor 1b of the transmission line, so that the voltage that deflects the leaf 3 is also applied to the crystal to be calibrated. Specifications 567,637 and 584,250 are referred to.
Patent GB-569635-A (GB)
Title: A cycle-pump locking device
IPC: B62J11/02
Filed: 1943-08-05
Abstract: 569,635. Cycle-pump locking devices. SMITH, G. V. Aug. 5, 1943, No. 12642. [Class 136 (i)] A locking device for a cycle pump comprises a plate C fixed to a cycle frame tube A and carrying a padlock K or other lock secured thereto, and a plate or flange D fixed to the pump B and engaging or being engaged by the lock. In the construction shown in Fig. 1 the flange D passes through a slot in the plate C and has a hole engaged by the hasp of the padlock K. In the modification shown in Figs. 5 and 5A the part D fixed to the pump B has a tang D which is pivoted thereto at J and engages the lock K fixed to the plate C. Modifications are also described in which the tang is rigid with the flange D and is parallel to the axis of the pump.
Patent GB-437294-A (GB)
Title: Piezo electric devices
IPC: H03H9/02
Filed: 1934-04-27
Abstract: 437,294. Piezo - electric crystals. STANDARD TELEPHONES & CABLES, Ltd., 63, Aldwych, London.-(Western Electric Co., Inc. ; 195, Broadway, New York, U.S.A.) April 27, 1934, No. 12748. Drawings to Specification. [Class 40 (v)] In order to reduce to a negligible amount, or to zero, an unwanted mode of vibration in a piezo-electric crystal, the angle of cut is so chosen with regard to the applied field, that the coupling constant in the piezo-electric equation of the crystal determining the amount of cross-coupling between the desired mode of vibration and an unwanted one is reduced to a minimum. By this method, the angle of cut may be chosen to produce a crystal having a single mode of vibration. A particular example comprises a plate with its plane parallel to the electric axis of the crystal and inclined at an angle of 31‹ to the optical axis. This crystal has a small temperature coefficient and it is stated that the clamping in its mount has little effect on the oscillations. Clamping may be at the periphery or along central modal lines. The Specification contains a mathematical discussion of the relationship between the mechanical stresses and strains set up in a crystal in response to an applied field, and shows how a set of equations may be obtained giving the tensile strains in the direction of the three orthogonal axes of the cut crystal and the shear strains in planes perpendicular thereto, in terms of the various stresses set up. The coefficients or coupling constants of these stresses depend on the angles of orientation of the axes of the cut crystal to the crystallographic axes of the mother crystal and, by equating them to zero, suitable angles of orientation may be found. The cases in which one of the axis of the cut crystal is parallel with a crystallographic axis furnish comparatively simple solutions. Alternatively, sets of graphs may be plotted showing the various stresses at different orientations, from which orientations may be selected at which there are no unwanted couplings or troublesome couplings are negligible.
Patent GB-597902-A (GB)
Title: Improvements relating to guillotine and like machines
IPC: B26D7/01
Filed: 1945-05-23
Abstract: 597,902. Shearing-machines. BRITISH THOMSON - HOUSTON CO., Ltd., and WARREN, F. W. May 23, 1945, No. 12896. [Class 31 (i)] . In a guillotine or like shearing-machine in which the sheet material 6 is fed to an adjustable stop 4 mounted in a support bracket 3 secured to a feed table 2 and strips are cut from the material by a guillotine cutter 1, an additional stop 7 is provided against which the last section of the sheet is registered in effecting the final cutting operation on a strip. This prevents wastage and ensures safe operation. The last strip is preferably reversed so as to register a straight edge against the stop 7. The stops 4, 7 are both adjustable in position and are preferably set at the same distance from the cutter. The stop 7 is mounted in a box 8 adjustable in a dovetail groove and a spring urges the stop to raised position, but the stop is normally depressed by the sheet material.
Patent GB-912080-A (GB)
Title: Improvements in or relating to cameras
IPC: G03B9/64
Filed: 1960-04-12
Abstract: 912,080. Photographic shutters. ZEISSSTIFTUNG, CARL, [trading as ZEISS, C., [Firm of]], and LOMB, A. H., [together trading as COMPUR-WERK. F. DECKEL oHG]. April 12, 1960 [April 21, 1959], No. 12998/60. Class 98 (1). A photographic shutter comprising a shutter blade actuating ring driving member adapted to return from a cocked position to a de-energized rest position and associated therewith a flywheel delay gear-mechanism for retarding said member during its return for an adjustably variable length of time, the driving effort being transmitted to the flywheel delay gear mechanism by a lever arrangement having an input member which projects into the path of the returning driving member, is characterized in that the lever arrangement consists of a timing lever which for the purpose of adjusting the length of the retardation time is pivotally mounted on a fixed fulcrum and of a second lever, said second lever being double-armed and pivotally mounted on said timing lever whereby the one arm of said second lever forms the input member of said lever arrangement and the second arm which acts on the flywheel delay gear-mechanism is provided with a cam, the arrangement being such that the motion of the timing lever during adjustment of the length of the retardation time does not transmit any motion to the flywheel delay gear mechanism. As shown, the shutter comprises a main driving member 10 which, at shutter release, runs down in the clockwise direction under loading of a spring 12 and successively engages pins 14a and 14b on a shutter blade ring 14 for opening and closing the shutter blades (not shown). During the rotation of member 10, an abutment 10a thereof comes against a lug 24a of a lever 24 which is pivoted at 28a and has a cam edge 24b engaging a pin 26a on a toothed segment 26 which is itself pivoted at 30 and is coupled by way of gears 18a, 186 and 20a to a flywheel 20b. To vary the delay provided by this retard mechanism, the lever 24 is carried by a timing lever 28 which is pivoted at 32 and has a pin 38 engaging in a control slot 40 of an exposure time setting ring 42, the arrangement being such that no motion is transmitted to the flywheel during adjustments of ring 42 for setting of different exposure times. The flywheel is coupled by way of pinion 22 to a weak return spring 22b.
Patent GB-586572-A (GB)
Title: Improvements in internal combustion turbine plant for propulsion by jet action, at least in part
IPC: F02K3/12
Filed: 1943-08-11
Abstract: 586,572. Gas turbines. SMITH, D. M., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Aug. 11, 1943, No. 13027. [Class 110 (iii)] An auxiliary or augmentor jet AJ is energized by a combustion chamber Ca Ca which receives air from the compressor of the main jet-propulsion unit. The air may be taken from the H.P. end of the compressor or from an intermediate point. The auxiliary unit may include a twotiered jet augmentor with turbine blades ACT and compressor blades D, F. The auxiliary unit may have a compressor which further compresses the air received from the main unit and is driven by a turbine wheel separate from the jetaugmentor. An auxiliary unit without a jetaugmentor has a turbine which drives an airscrew. Another auxiliary unit consists only of a combustion chamber and a jet. Specification 586,551 is referred to.
Patent GB-738875-A (GB)
Title: Thermoplastic compositions
Inventor: EDGERLEY PETER GEORGE
IPC: C08F236/04
Filed: 1953-05-11
Abstract: A composition comprises a resinous copolymer made from butadiene and 75-95 per cent methyl methacrylate based on the mixture, and natural and/or synthetic rubber.  Specified synthetic rubbers are polybutadiene, and copolymers of butadiene with styrene, acrylonitrile or methyl methacrylate.  The resinous copolymer may contain a small proportion of a third copolymerizable compound, e.g. styrene.  The preferred proportions of resinous copolymer are from 5-95 per cent, based on the total mixture, while 30-50 parts are particularly preferred when mixed with 100 parts of natural rubber. The composition may be prepared by mixing a dispersion of the resinous copolymer with the rubber latex and coagulating the mixture or, when the mixture contains not more than 10 per cent rubber, spray drying the mixture.  The composition may be compounded with the usual vulcanization ingredients and vulcanized.  The composition may be used for shoe soles.ALSO:A composition comprises natural rubber and a resinous copolymer made from butadiene and 75-95 per cent of the mixture of methyl methacrylate.  A synthetic rubber may also be present.  It is preferred that 30-50 parts of the resinous copolymer are mixed with 100 parts natural rubber.  The composition may be prepared by mixing a dispersion of the resinous copolymer with rubber latex and coagulating the mixture or, when the mixture contains not more than 10 per cent rubber, spray-drying the mixture.  The composition may be compounded with the usual vulcanizing ingredients and vulcanized.  It is particularly useful for the manufacture of shoe soles.
Patent GB-1310578-A (GB)
Title: Rotary piston internal combustion engines
IPC: F02B1/04
Filed: 1970-03-18
Abstract: 1310578 Rotary-piston engines SOC DE CONSTRUCTIONS MECANIQUES PANHARD & LEVASSOR 18 March 1970 [18 March 1969] 13086/70 Heading F1F In an 1. C. engine of the kind comprising a three (or more) sided piston 6 which rotates with planetary movement within a casing 1 having an epitrochoidal inner surface 2 with two (or more) lobes, a turbulence chamber 20 fitted with a spark-plug 5a is provided having a wide opening 21 in the surface 2 just beyond top dead centre so that when a piston corner passes the opening the pressure in the two working chambers on either side of the corner and in the turbulence chamber are equal. To maintain the same compression ratio as an engine of the same geometry but without the turbulence chamber, the peripheral recesses 15 in the piston are reduced in volume by an amount equal to the volume of the turbulence chamber. A second spark-plug 5b may be fitted, the two plugs firing substantially simultaneously. The turbulence created in chamber 20 and the shape of this chamber together with the consequential reduction in the volume of the elongate piston recess results in more complete combustion and increased power and since combustion is less prolonged reduction in exhaust temperature. With the reduced volume piston recess the passage through which burnt gases can pass between the piston and casing to mix with the incoming charge is reduced and more complete evacuation of exhaust gases results.
Patent GB-543301-A (GB)
Title: Improvements in or relating to the production of alkali cellulose and cellulose ethers
IPC: C08B1/08
Filed: 1940-08-16
Abstract: 543,301. Cellulose derivatives. DREYFUS. H. Aug. 16, ]940, Nos. 13115 and 14927. [Class 2 (ii)] Alkali cellulose is obtained by impregnating cellulose with an anhydrous or substantially anhydrous solution in an organic solvent of an alkali metal compound, which will yield alkali cellulose, and then concentrating the solution on the cellulose by removal of organic solvent. The organic liquid may be ethyl alcohol or other liquid which is a solvent for the alkali metal compound. Caustic soda, caustic potash, sodamide, or sodium ethoxide may be used as the alkali metal compound. An etherifying agent may be introduced at the time of formation of the alkali cellulose. Preferably, the impregnation liquid is removed, e.g., by pressing and then evaporating under reduced pressure prior to the introduction of any etherifying agent. Evaporation of the organic liquid may be effected in a current of nitrogen. Azeotropic distillation methods may be used, e.g... alcohol may be removed from alkali cellulose by heating in toluene. The process may result in cellulose containing anhydrous alkali hydroxide united therewith, or in cellulose in which one or more of the hydrogen atoms of the hydroxyl groups are replaced by alkali metal atoms. The alkali cellulose may be rendered more reactive by impregnation with a catalyst such as copper formate, acetate, or sulphate. The alkali cellulose may be subjected to etherification, e.g. with methyl, ethyl, or butyl chloride or bromide, dimethyl or diethyl sulphate, ethyl hydrogen sulphate, or sodium ethyl sulphate. Etherification may be effected at temperatures of 60‹ C.-120‹ C. or more. Etherification may be carried out in presence of an organic liquid which is a solvent for the etherifying agent and for the cellulose ether produced or in presence of a large quantity of etherifying agent, e.g., ethyl chloride. The cellulose ethers produced may be subjected to ripening to modify the viscosity or other properties. In an example, cellulose is impregnated, with a solution of sodium hydroxide in alcohol, pressed and then heated under reduced pressure to remove the alcohol. The alkali cellulose is then heated in a medium containing diethyl sulphate and toluene. The ethyl cellulose is separated, dissolved in benzene and precipitated. It may be used for the production of films and other articles. Specification 164,374, [Class 2 (ii)], is. referred to. One of the Provisional Specifications describes also the production of alkali-cellulose by treatment of cellulose with sodium compounds in the presence of non-solvent organic liquids.
Patent GB-131250-A (GB)
IPC: A22C25/04
Abstract: 131,250. Wallace, P. March 28, 1919. Endless moving sieves.-Apparatus f o r separating small from large fish comprises an endless conveyer formed of transverse rollers 2 with parallel-sided interspaces and con nected together and maintained at the required distance apart by side chains 3, the rollers being free to rotate. The conveyer is mounted on sprockets 8. and is driven from one of these, the upper side of the conveyer being either horizontal or slightly inclined. The rollers rest near their ends on track bars 10, 11; movement of the conveyer thus causes the rollers to rotate. The fish are fed on to the conveyer from a shoot 13 having a narrow outlet 15 and a stopboard 14 at its lower end; the stop-board turns the fish so that their length extends parallel to the axes of the rollers, and a swing-gate 16 may also be provided in the shoot to assist in turning the fish. The small fish pass through the apertures 4 between the rollers on to a shoot or receptacle 12, and the large fish are delivered at 17. The conveyer may be driven by sprocket-wheels engaging a sprocket-chain provided on the conveyer.
Patent GB-361261-A (GB)
Title: The manufacture of new condensation products
Filed: 1931-05-04
Abstract: The compounds made by condensing a primary of secondary aliphatic amine containing at least one hydrocarbon radicle with more than 8 carbon atoms or a mixture thereof with a halogenalkylamine which is disubstituted on the nitrogen by alkyl groups possess saponine-like properties and are used as emulsifying agents for oils.ALSO:Aliphatic amines; emulsions, making.--Compounds which possess saponine-like qualities are made by condensing a primary or secondary aliphatic amine containing at least one hydrocarbon radicle with more than 8 carbon atoms or a mixture thereof with a halogenalkylamine which is disubstituted on the nitrogen by alkyl groups.  They are suitable for producing a permanent foam as auxiliary products in the textile industry, e.g. as emulsifying agents for oils and washing and purifying agents.  In an example dimethyl- or diethylaminoethylchloride hydrochloride (1 mol.) is condensed with n-heptadecylamine (1 mol.); using an excess of alkylating agent the amount of heptadecyl-di-(diethylaminoethyl)-amine formed increases. N-monoalkyl heptadecylamines are also specified as starting materials.
Patent GB-132161-A (GB)
IPC: D05B35/06
Abstract: 132,161. Fairweather, W., (Singer Manufacturing Co.). Jan. 31, 1919. Sewing-machines; work - guides. - An edge guide 20, situated on the work-plate in advance of the stitching point for guiding the under ply of overlapping materials, is slidingly mounted so that it can be depressed into an inoperative position when it is desired to make the edges of the materials abut. It is urged upwards by a spring 21 but can be held in the lower position by a latch lever 24. The guide is shown applied to multipleneedle cylinder bed machines as described in Specifications 122,862 and 122,863