baber/WOPTO huggingface dataset:
Patent GB-578087-A (GB)
Title: Improvements in or relating to the manufacture of delay fuzes for non-rotating projectiles
IPC: F42C9/10
Filed: 1943-05-12
Abstract: 578,087. Projectile fuzes. MORRIS, G., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. May 12, 1943, No. 7543. [Class 9 (i)] A delay-action fuze for a non-rotating projectile is shown in two different longitudinal section planes, and comprises a firing-pin 5 operated by inertia on discharge to fire a percussion cap 9 and thereby ignite a length of delay composition 16 in the flash-tube, 15 and a flash-giving composition 17. The main detonator 23, to be initiated by the flash, is carried in a pivoted member 21, which is normally held in the position shown by a safety-bolt 2 which sets-back by its inertia on discharge, against the spring 3, and becomes jammed in the slightly-tapered bore 4. A spring 22 thereafter swings the detonator into line with the flashpassage and a passage 26 leading to the primer charge 29. The passage 26 is filled with a lightly - compressed detonating composition, such as tetryl or pentaerythritol-tetranitrate, which is not easily detonated by a direct flame from the composition 17. The detonator carrier 21 has a slight longitudinal freedom on its pivot pin so that by its inertia it will bind frictionally against the rear wall of its recess when the projectile is fired, and delay the swinging of the carrier to operative position until acceleration has diminished. Bores 32 are made in the fuze-body 1 to lighten it.
Patent GB-838064-A (GB)
Title: Expanded plastic materials and blowing agents for producing them
Inventor: ARGYLE CHRISTOPHER STANLEY
IPC: C08J9/10
Filed: 1956-03-10
Abstract: Salts of nitrourea and ammonia or organic bases containing an -NH- group are obtained by reacting the nitrourea and the base together in solution and subsequently adding a nonsolvent to precipitate the crystalline salt.  Salts with methylamine, ethylamine, piperidine, hydroxyethylethylenediamine, morpholine and phenylhydrazine are referred to.  They are used as blowing agents for synthetic resin and rubbers and like plastics. Specification 790,066 is referred to.ALSO:Rubbers and plastic materials are obtained in expanded form by heating a mixture of the resin, and a salt of nitrourea with ammonia or an organic base.  Bases specified are methylamine, ethylamine, propylamine, amylamine, piperidene, urea, morpholine, ethyl- and phenylhydrazine and particularly hydroxy ethyl ethylene diamine.  The salts may be formed in situ in the plastic mix.  In examples: (1) 100 parts epoxy resin were warmed to 40 DEG  C. and 6 parts hydroxyethyl-ethylenediamine added slowly and then 3 parts nitrourea and 1 part non-ionic wetting-agent.  The mixture was poured into a mould maintained at 60 DEG  C. and an expanded cured product was obtained; (2) as in (1) employing a mixture of an expoxy resin, nitrourea, morpholine and diethylenetriamine; (3) a mixture of epoxy resin, nitrourea, non-ionic wetting-agent and piperidine was used; (4) is similar to (3) without the wetting-agent.  In Example (5) methylamine, nitrourea and triethylenetetramine are used to expand and cure an epoxy resin; (6) 50 parts of paste-forming polyvinyl chloride and 1.7 parts nitrourea were mixed dry and to the mixture was added 2 parts of a 7:1 white lead dispersion and 41.3 parts of a mixture of 40 parts dialphanylphthalate and 1.3 parts morpholine. The mix was passed through a triple roller for blending and the product heated in a mould at 100 DEG  C. for 4-5 minutes.  The salts of nitrourea may also be used for expanding polymers derived from styrene, vinyl chloride, butadiene, acrylonitrile, acrylates, methacrylates, vinyl acetate or vinylidene chloride.  Starters or precursors for the blowing agents, e.g. thiosemicarbazide, may be included in the mix.  When the blowing-agent decomposes at low temperature the exothermic heat, e.g. of a cross-linking reaction, may be sufficient to expand a mixture.  Specification 790,066 is referred to.ALSO:Salts of nitrourea and organic bases (see Group IV(b)) are used as blowing agents for plastics, i.e. synthetic rubbers and styrene, polyvinyl chloride butadiene, acrylonitrile, acrylates and like polymers.  Epoxy resins are particularly referred to, in which case it is only necessary to mix together the epoxy resin base and nitrourea; on heating the resin is hardened as well as obtained in cellular form.  A specific example is also given employing a pigmented polyvinyl chloride expanded with the morpholine salt of nitrourea.  Starters or precursors for the blowing agents may be included in the compositions, e.g. thiosemicabazide. Specification 790,066 is referred to.
Patent GB-537940-A (GB)
Title: Improvements in and relating to multi-contact electric switches
IPC: H01H19/62
Filed: 1940-04-29
Abstract: 537,940. Multi-contact electric switches. BRITISH THOMSON-HOUSTON CO., Ltd. April 29, 1940, No. 7673. Convention date, April 29, 1939. [Class 38 (v)] An electric switch comprises a housing with a recess in which is a substantially central rotary member with a plurality of cams operating six spring contacts arranged in two groups of three at different levels and co-operating with fixed contacts carried by pairs of arms extending from three terminal members disposed round the rotary cam member, the two arms of each terminal member being at different levels. As shown, a housing 21 is formed with front and rear recesses 23, 22, respectively containing the switch positioning means and the fixed and movable contacts. Terminal members 27, 35, 40 secured to the rear wall of the housing are each provided with a pair of integral arms carrying the fixed contacts, respectively 29 and 30, 36 and 37, 41 and 42, the two arms on each member being at different levels and extending in different directions. The movable contacts are carried by six U-form spring blades, arranged in pairs, the members of each pair being arranged in opposite directions and at different levels. Each blade is spot-welded, or otherwise secured to the leg of a strap-member disposed in a groove in a wall of the recess 22. Thus, the blades 49, 54 are secured respectively to the leg 47 of a strap-member 46 and the leg 53 of a strap-member 51. The strap-members are exposed on the rear face of the housing, and in the case shown the straps 46, 51 are connected by a strip 56, and a shorting strip 70 connects three of the remaining straps 59, 71. 75. The contact blades are operated by cam discs 83 of insulating material secured on a shaft 84 with intervening separating plates 86, sliders 81 being secured to the blades and resting on the cams. The shaft 81 carries in the recess 23 a star-wheel engaged by rollers on two spring-connected pivoted arms in order to position it in its operative positions. Diagrams show the use of the switch in connection with a three-wire supply circuit and a two-element heater for giving five degrees of heating and an "off" position. In a modification, the contact arm 36 of the member 33 is replaced by a contact arm secured to the cover and connected to the terminal 27 the shorting strip 56 is omitted, and the strip 70 connects only the terminal straps 59, 75. Diagrams show the use of this form for controlling three oven-heater elements connected to a threewire supply circuit to give four degrees of heating and an " off " position.
Patent GB-1359799-A (GB)
Title: Enclosed liquid quantity sensor
IPC: G01F23/26
Filed: 1973-02-16
Abstract: 1359799 Aircraft &c K E POLISCHUK V N VOLOKHOV and S P KRYLOV 16 Feb 1973 7710/73 Heading B7W [Also in Division G1] The plates of a capacitor tank gauge are rigidly tied to one another by a crimped insulating separator sheet. Fig. 1 shows a three-plate capacitor, 1, 2, 3, with separating crimps 4, 5, of fibre glass impregnated in, e.g., organosilicon resins. The leads 8 are shown secured to an outer plate by a glass-fibre sheet 9. The plates may be shaped to the profile of an aircraft wing tank, Fig. 4, and secured to the walls or bulkheads 14, 15 by bolts through bushes 17 (Fig. 1) to act as structural reinforcing elements.
Patent GB-653651-A (GB)
Title: Hydraulic power supply and control units
Inventor: ASHTON BENJAMIN N
IPC: F15B7/00
Filed: 1948-03-15
Abstract: 653,651. Reciprocating pumps. ELECTROL, Inc. March 15, 1948, No. 7790. Convention date, March 14, 1947. [Class 102(iv)], [Also in Group XXIX] In a hydraulic unit (see Group XXIX), a piston 30 is reciprocated in a cylinder 17 by a pivoted lever that is rocked back and forth and connected to the piston by a link 38. During the outward stroke of the piston liquid is drawn into the cylinder from a reservoir 12 and past a valve 27 which closes on the return stroke of the piston, and the liquid is forced past a valve 37, through ports 36a and into a passage 50 connected with selector valve units (see Group XXIX). The castellated piston head is grooved for a rubber ring 33 and a further guide is provided by a ring 45 housing rubber seals 46, 47.
Patent GB-1206872-A (GB)
Title: 6beta-HYDROXY-7alpha-METHYL-ANDROSTANE COMPOUNDS
IPC: C07J1/00
Filed: 1968-02-16
Abstract: 1,206,872. 6# - Hydroxy - 7α - methyl - andros - tane compounds. UPJOHN CO. 16 Feb., 1968 [15 March, 1967], No. 7798/68. Heading C2U. Novel steroids of the formulae (wherein R<SP>11</SP> is H or C 1-2  carboxylic acyl; and R is H or C 1-12  alkyl) are prepared by acylating 7α-methyl testosterone or a 17α-R derivative thereof to give the 17-acylate of the corresponding #<SP>3,5</SP>-3-enol ester and reacting this with an organic per acid to give the required #<SP>4</SP>-3- ones containing a 17#-acyloxy group which when required may be catalytically hydrogenated to the ring A saturated compounds. Hydrolysis of the 17-acylates gives the free 17#-ols. The novel 7α-methyl-steroids are stated to possess anabolic, androgenic, progestational, anti-fertility, cholesterol lowering and CNS depressant properties, and they may be made up into therapeutic compositions with suitable carriers. Specification 1,206,874 is referred to.
Patent GB-853271-A (GB)
Title: New cyclopentanophenanthrene derivatives and process for the production thereof
IPC: C07J1/00
Filed: 1957-03-08
Abstract: The invention comprises compounds of the formula: <FORM:0853271/IV(b)/1> <FORM:0853271/IV(b)/2> wherein R and R2 are lower alkyl radicals of less than 7 carbon atoms, R1 is hydrogen or an acyl group, and X represents a double bond or a saturated linkage of the allo series between C4 and C5, and their preparation by treating androstan 17b -ol-3-one or a 17a -lower alkyl derivative with an excess of a lower alkyl iodide in the presence of a potassium t-alkoxide to form a corresponding 2,2-dialkyl derivative, treating the latter with approximately 1 equivalent of bromine to form the corresponding 4-bromo compound and reacting it with a dehydro-brominating agent.  Examples detail the preparation of 2.2-dimethyl-androstan-17b -ol-3-one, its acetate, propionate, benzoate, cyclopentylpropionate ; its 17a -methyl, 17a -ethyl and 17a -propyl analogues, and the corresponding \se4-androstene compounds.
Patent GB-234581-A (GB)
Title: Improvements in steam turbine power plant
IPC: F01K9/00
Filed: 1924-03-27
Abstract: 234,581. English Electric Co., Ltd., and K÷nig, M. March 27, 1924. Surface condensers.-In order to obtain steam conditions appropriate to the different velocities along the length of the low pressure blades the last stage of the low pressure blading is divided into two or more concentric sections 4, 5 and each of these sections has associated with it a condenser or condenser section, and the cooling water flows first through that condenser section 8 associated with the outer section 4 of the blades, then to the condenser section 10 corresponding to the next annular section 5 of the blading, and so on. The condensate is removed from a U-tube 18 connecting the sections by a pump 19. A portion of the condensate may pass by a pipe 21 and mix with water from a pipe 22 passing to a jet condenser 17 receiving steam and air exhausted from the condenser sections 8, 10 by ejectors 16. Airfrom the jet condenser 17 is removed by an ejector 23 while the water passes to the section 10 by a U-tube 25 and is removed thence by the pump 19.
Patent GB-878426-A (GB)
Title: Improvements in detachable brackets for occasional purposes
Inventor: ELLIOTT GORDON ARTHUR
IPC: A47G29/08
Filed: 1959-03-06
Abstract: 878,426. Brackets. B.E.F. PRODUCTS (ESSEX) Ltd. June 19, 1959 [March 6, 1959], No. 7831/59. Class 52(5). [Also in Group XXV] A tray-supporting bracket adapted to be connected to an available structure having a slot extending in a substantially vertical plane (e.g. the slot in a car door for a wind-down window) comprises a flat back plate 1 having a shelf 2 on its front face over which extends one or more hooks 3 projecting downwardly from the back plate in such a way that a tray resting on the shelf may be held by its upstanding lip engaging under the hook or hooks, the back plate extending below the shelf so that the flat portion thereof underneath the shelf constitutes a part which can be tucked into the slot in the structure. The back plate has a springy tongue 6 extending upwardly and forwardly through a recess in the shelf and which engages under the usual lip provided on a tray to fasten the tray in position.
Patent GB-783116-A (GB)
Title: Cotton sutures and ligatures
IPC: A61L17/14
Filed: 1955-03-17
Abstract: A cotton strand is impregnated with a homopolymer or copolymer of methacrylic acid ester of the general formula <FORM:0783116/IV (b)/1> in which, in the case of a homopolymer, R is an alkyl radical having 3-6 carbon atoms and, in the case of a copolymer, R is two or more different alkyl radicals neither or none of which has more than 12 carbon atoms and the average number of carbon atoms in the R groups of the copolymer is in the range of 3-6.  The polymer may be of a methacrylic acid ester or esters, e.g. normal butyl methacrylate and normal hexyl methacrylate copolymer and may be applied in organic solution.  After removing the solvent, the strand is passed through a pre-heating column and then drawn through a tunnel-shaped aperture in a heated die (see Group VIII), the diameter of the aperture not exceeding the diameter of the strand by more than two mils, and then baked.  The organic solvent may be toluene, xylene, acetone, ethyl acetate, methyl ethyl ketone, naphtha or mixtures thereof.ALSO:A cotton suture strand is coated and impregnated with a homopolymer or copolymer of methacrylic acid esters of the general formula <FORM:0783116/VI/1> in which, in the case of a homopolymer, R is an alkyl radical having 3-6 carbon atoms and, in the case of a copolymer, R is two or more different alkyl radicals neither or none of which has more than 12 carbon atoms and the average number of carbon atoms in the R groups in the copolymer is in the range of 3-6. A cotton suture is coated and impregnated with a solution in an organic solvent of a homopolymer or copolymer of methacrylic acid ester or esters.  After removing the solvent the suture is passed through a preheating column and then is drawn through a funnel-shapped aperture in a heated die (see Group VIII), the diameter of the aperture not exceeding the diameter of the thread used by more than two mils, and then baked.  The suture is impregnated and coated with 5-20 per cent by weight of polymer. Such a suture is non-capillary, does not broom when cut and has good knot holding properties.  A copolymer of normal butyl methacrylate and normal hexyl methacrylate is preferred.  The organic solvent used may be toluene, xylene, acetone, ethyl acetate, methyl ethyl ketone, naphtha or mixtures thereof.
Patent GB-116324-A (GB)
Title: Improvements in Processes an Apparatus for Drying Coagulated and Uncoagulated Latex and the Products obtained thereby.
Inventor: MELLERSH-JACKSON WILLIAM JOHN
IPC: B29B13/06
Filed: 1917-06-01
Abstract: 116,324. Jackson, W. J. Mellersh-, (General Rubber Co.) Juue 1, 1917. Latex, treating; india-rubber, preparation of.- A process of drying coagulated or uncoagulated latex comprises insolubilizing the nitrogenous matter and then submitting the mass to vacuum evaporation. The insolubilization may be accomplished by the action of heat or by the action of agents such as antiseptics, polycylic organic compounds, hydroxynaphthalenes (particularly betanaphthol), and enzymes. Apparatus for the process comprising heating is shown in Fig. 2. The latex is delivered through a valved pipe 2 into a chamber containing a series of pans 9 arranged as shown so that the latex overflows from the upper pan into the next below and so on. Steam pipes 10 are provided for heating and a vacuumpump 4 is connected to a vacuum-exhaust pipe 3. A drying medium in the form of heated air may also be supplied after deoxygenation by passing through burning charcoal in the grate 13.
Patent GB-551302-A (GB)
Title: Improvements in or relating to variable pitch propeller systems
IPC: B63H3/10
Filed: 1940-05-02
Abstract: 551,302. Controlling variable pitch propellers. STEVENS, A. H. (Hammond, jun., J. H.). May 2, 1940, No. 7926. [Class 135] [Also in Group XXXV] In a variable pitch propeller system for marine craft, means responsive to a condition of operation of the craft actuates pitch-changing means at a speed which is proportional to the amount of change in said condition in either direction from a predetermined medium valve. In the form shown, an electric motor 21 changes the pitch of the propeller blades 13 by means of a worm 22, a floating lever 23, a collar 29, a rod 28, a piston 27, and a rod 19 slidable longitudmally within the propeller shaft 15. Fluid for actuating the piston 27 is supplied by a pump 26 through a control valve 25 and a distributing box 25a, the lever 23 being pivoted to the end of the rod 24 of valve 25. The motor 21 is controlled by the position of the pointer 53 of a speed indicator 52 operated by a speedometer 92: The blades 13 are set at the normal operating angle, as shown by an indicator 31, and the vessel brought to the desired speed, as shown by the pointer 53. A ring 57 carrying insulated contacts 61 ... 66 is then rotated by knob 60 until contact 56 is engaged by the insulation between segments 63, 64, and a switch 83 is moved into engagement with its control contact. If the speed of the craft increases or decreases, the pointer 53 will be rotated in a clockwise or anticlockwise direction, the contact 56 will engage segment 63 or 64, and the motor 21 will be rotated to gradually decrease or increase the pitch of the blades 13. Less or more power is supplied by the constant speed prime mover 20, and the speed of the craft is decreased or increased until contact 56 rotates to its original position and the motor 21 stopped. For a bigger increase or decrease in the speed of the craft the contact 56 engages segment 62 or 65, and as the resistances 76, 81 are less than the resistances 77, 80, the motor 21 rotates faster and causes a more rapid change in the pitch of the blades 13. Segments 61, 66 have no associated resistances and therefor correspond to the fastest change of pitch. In a modification described and illustrated in the Specification the condition-responsive means is responsive to changes in torque of the drive shaft and the pitch is changed to maintain the torque constant.
Patent GB-139646-A (GB)
Title: Improvements relating to safety devices for power presses
IPC: F16P3/04
Filed: 1919-03-29
Abstract: 139,646. Sweeney, S., and Sweeney & Blocksidge. March 29, 1919. Guards, controlling.-A guard e for power presses is fixed on a lever a secured to a spindle b, which is pivoted in the frame and carries an arm h having a pin n in engagement with an adjustable sleeve i on the clutch-operating rod g. The lever a may be hand-controlled, so that the guard must be in position when the press is started, or the guard and clutch may be controlled by a treadle connected to the lower end of the rod g.
Patent GB-571783-A (GB)
Title: Improvements relating to casting dopes
IPC: C08L27/00
Filed: 1943-05-19
Abstract: A small proportion of lecithin or similar phosphatide is incorporated in a synthetic resin film-casting dope to facilitate removal of the film from the casting surface.  Instead of lecithin itself there may be used other phosphatides consisting of phosphoric acid, glycerol, higher aliphatic monocarboxylic acids and organic bases in combination.  The mono-amino-phosphatides cephalin and lecithin obtained from soya-beans may be used. Synthetic lecithins as well as the natural substances may be employed.  Polyvinyl compounds, or synthetic linear polyamides may be used as film-forming substances, e.g. polyvinyl formal, acetal, propional, butyral, or benzalformal, or hexamethylene di-ammonium adipate polymer, or an interpolymer from hexamethylene di-ammonium adipate, hexamethylene di-ammonium sebacate and caprolactam, or a polyamide-polyester such as hexamethylene di-ammonium sebacate-pentaglycol sebacate polymer.  In an example, lecithin in soya bean oil is added, in varying amounts up to 1 per cent of the solids content, to different portions of a solution of polyvinyl butyral in denatured alcohol.  The tension required for stripping films cast from the solutions decreases with increase in the lecithin content.  In another example, a solution of an interpolymer from hexamethylene diammonium adipate and sebacate, and caprolactam in a mixture of trichlorethylene and methanol containing a small amount of lecithin, is cast on a chromium surfaced casting wheel and formed into a film.  Specifications 409,507, 461,236, 501,197, 522,161, 542,509 and 566,048 are referred to.
Patent GB-309575-A (GB)
Title: Process for the production of micro-porous rubber
IPC: C08L21/00
Filed: 1929-03-12
Abstract: 309,575. K. D. P., Ltd., (Assignees of Beckmann, H.). April 14, 1928, [Convention date]. Latex, coagulating and treating.-Albuminous or albumen-decomposition products e.g. casein are added to latex in the preparation of microporous rubber as described in Specification 240,430, to prevent the formation of lumps. The addition may be made to the coagulating agent or to the latex.
Patent GB-456872-A (GB)
Title: Improvements in or relating to tables
IPC: A47B1/02
Filed: 1936-03-18
Abstract: 456,872. Tables. BURRILL, R., 55, Amberton Road, Easterly Road, Leeds. March 18, 1936, No. 8074. [Class 52 (iii)] In an extensible table of the kind comprising a disappearing centre leaf, the underframe 1 comprises side bars 2 forming guides for runner bars 5 associated with the end leaves 4, and the centre leaf 8 is fitted on its underside with triangular blocks 9 with which engage the inclines 10 on transverse bars 6 connecting the inner ends of each pair of bars 5. The end leaves 4 are connected by suitable devices so as to move in and out simultaneously, and at the end of their outward movement the parts 10, 9 engage so as to lift the centre leaf 8 to a level somewhat above the level of the end leaves. There rises with it a latch 15, attached to its underside (one at each edge of the table), in the form of a short strip of metal with V-shaped ends. As this rises, its pivot 14 moving in a slot 16 in a guide member 11, it contacts with a stud 17 and is tipped. As the centre leaf falls to the level of the end leaves the latch 15 engages with an abutment 18 and further descent is prevented. If, however, the centre leaf is again raised, the part 17 turns the latch 15 to such a position that the descent of the latch 15 past the part 18 is not prevented, and the centre leaf drops accordingly. Specification 456,885 is referred to.