baber/WOPTO huggingface dataset:
Patent GB-657988-A (GB)
Title: Improvements in or relating to a combined hair trimming and shaving appliance
IPC: B26B21/12
Filed: 1949-05-04
Abstract: 657,988. Safety razor ; hair trimmers. WALKER, J. S., and FRASER & GLASS, Ltd. May 4, 1949, No. 11891. [Class 30] A combined hair trimming and shaving appliance comprises a support 1 having long teeth 2 projecting from one longitudinal edge and short teeth 3 projecting from the opposite longitudinal edge, the two sets of teeth tapering towards opposite surfaces of the support, and a double-edged razor blade 5 clamped to the support. The support 1 and a cover plate 4 are preferably secured together by a screw anchored in the cover plate engaging a nut 14 and the blade is positioned by studs on the support or on the cover plate passing through the blade and entering complementary recesses in the other part to project to a predetermined extent over both sets of teeth. The long teeth 2 are used for hair-cutting and the short teeth 2, which are provided with a protective step 6 co-incident with the cutting edge of the blade, are used for shaving.
Patent GB-804747-A (GB)
Title: Improvements relating to attenuators
IPC: H01C10/32
Filed: 1957-04-11
Abstract: 804,747. Resistance networks. PATENT MANAGEMENT Inc. April 11, 1957 [April 11, 1956], No. 11905/57. Class 37. In an attenuator in which stray capacitances 18 exists between a first input lead 4 and an output lead 24, its effect is reduced by employing a resistor 20 in series with the second input lead 6 with a capacitor 22 connected to the lead 24. The attenuator may be in the form of a ladder with a rotary contact arm 12 arranged to rotate over a resistor 8 arranged in an arc. The capacitor 22 and capacitance 18 form a potential divider, thereby reducing the effect of the stray capacitance and enabling greater attenuation to be achieved.
Patent GB-1433727-A (GB)
Title: Method for reducing fluid losses from a cryostat
IPC: G12B15/04
Filed: 1974-03-18
Abstract: 1433727 Refrigerating; Liquefying gases COMMISSARIAT A L'ENERGIE ATOMIQUE 18 March 1974 [27 March 1973] 11907/74 Headings F4H and F4P Fluid losses from a Joule-Thomson cryostat 2, are reduced by maintaining helium 4 in its liquid phase and cooling it by a refrigeration circuit 8 supplied with helium under pressure  from a source 10 and at a temperature above the inversion temperature to the Joule-Thompson expansion unit 18 via a heat exchanger 12 which uutilises both low pressure gaseous helium which has not liquified after passage through the unit and vaporized liquid 4 in a circuit 16. The heat exchanger and expansion unit are sufficiently small to permit their introduction through the neck of the cryostat which is sealed by a plug 20. In a further embodiment, Fig. 2, low pressure circuit is connected to a pump-compressor assembly for recirculation of the gaseous helium from the expansion unit which is vaporized in a heat exchanger largely submerged in the liquid helium of the cryostat and a condensation heat exchanger is formed by a portion of the return line of the system. The vaporized liquid is discharged through a separate circuit which also passes through the heat exchanger 12. Specific pressures of the helium at different points in the apparatus are given.
Patent GB-1169619-A (GB)
Title: A Device for Well-Casing Perforation using an Abrasive Fluid Jet
Inventor: PATRON THEODOR
IPC: E21B43/114
Filed: 1967-03-14
Abstract: 1,169,619. Perforating well casings. RUMANIA, MINISTRY OF PETROLEUM. 14 March, 1967, No. 11979/67. Heading B3D. A device for perforating a well casing by the use of a fluid jet containing abrasive particles comprises a sleeve 18 screwed to the lower end of the tubing string and having an internal shoulder h. A perforating assembly comprises a hollow body 1 having groups of four orifices fitted with nozzles 3. The upper end of the body 1 is screwed to a piston 17 above which is a one-way valve 22. Above the valve is a fishing head 25. Screwed into the lower end of the body 1 is a centring device comprising a hollow body 5 containing a piston 8 to which are pivoted centring fingers 13; the piston 8 is held in an up position by a ring 12 yielding at 40 atm. To effect perforation, the perforating assembly is introduced into the tubing string at the surface and its fall is assisted by a stream of clean oil. The body 1 and centring device having passed the shoulder h the piston 17 is arrested by the shoulder h. The increased fluid pressure forces the piston 8 down against a stop ring 16 and the fingers 13 are moved out through apertures e by arrangement with a member 14 to centre the assembly. Fluid containing abrasive is then supplied for a predetermined time, followed by a wash with clean oil. To extract the perforator assembly from the well the circulation is reversed. The piston 8 is raised until re-engaged by the ring 12, thus retracting the fingers 13. The valve 22 closes and the assembly is forced to the surface. If the piston 8 sticks with the fingers 13 extended, the latter strike the lower end of the sleeve 18, whereby pins 15 supporting the member 14 are sheared allowing the fingers to fall back into the body 5. If necessary the assembly is withdrawn by an overshot engaging the fishing head 25. The device can be used without first killing the well.
Patent GB-938044-A (GB)
Title: Dialkoxyaluminium hydride reducing agents
IPC: C07C29/147
Filed: 1961-05-11
Abstract: Aluminium alkoxides are produced by reacting aldehydes, ketones or acid chlorides with dialkoxy aluminium hydrides of formula Al(OR)2H, while in the presence of esters, nitriles, amides, organic nitrates, ethers, aryl halides or aromatic, olefinic and saturated hydrocarbons.  The alcohols may then be obtained by hydrolysing the alkoxides, e.g. with dilute sulphuric acid.
Patent GB-125296-A (GB)
Title: Improvements relating to Chucks.
Inventor: WILLIAMS EDWARD
IPC: B23B31/163
Filed: 1918-07-25
Abstract: 125,296. Williams, E. July 25, 1918. Chuchs.-Cam-closing chucks in which the cam is carried by a gear wheel, have pivotal connexions between the jaws and the cam. The jaws c are adjustable on carriers d which are simultaneously adjustable by cam surfaces h on a gear wheel f, independently pivoted bearing pieces j being inserted between the cam surfaces and the carriers d, Fig. 1. The cam plate may be rotated by bevel pinions, worm or screw gearing.
Patent GB-573237-A (GB)
Title: Improvements in and relating to the manufacture of gloves
IPC: A41D19/00
Filed: 1941-09-22
Abstract: Gloves or glove linings are made by securing together two pieces of textile material approximating the shape of the hand, applying the assembly to a former in the shape of an open hand, and subjecting the assembly to chemical treatment whereby shrinking or stretching of the textile material is effected.  The assembly thus shaped may be coated with rubber or other material as by dipping or spraying; the rubber may be in the form of latex or other aqueous dispersion or of a solution.  The chemical agent may be a strong solution of caustic soda, calcium thiocyanate, nitric acid or sulphuric acid.  The textile material may be cotton or mixed yarns, e.g. cotton and viscose rayon, and may be previously treated with boiling water, dilute solutions of caustic soda, sodium carbonate, soaps or wetting agents.  A wetting agent may be added to the caustic soda used in treating the assembly on the former.  After treatment the glove or glove lining may be washed and dried on the former and then dyed.ALSO:Gloves or glove linings are made by securing together two pieces of textile material approximating the shape of the hand, applying the assembly to a former in the shape of an open hand, and subjecting the assembly to chemical treatment whereby shrinking or stretching of the textile material is effected.  The assembly thus shaped may be coated with rubber or other material as by dipping or spraying; the rubber may be in the form of latex or other aqueous dispersion or of a solution.  The chemical agent may be a strong solution of caustic soda, calcium thiocyanate, nitric acid or sulphuric acid.  The textile material may be cotton or mixed yarns, e.g. cotton and viscose rayon, and may be previously treated with boiling water, dilute solutions of caustic soda, sodium carbonate, soaps or wetting agents.  A wetting agent may be added to the caustic soda used in treating the assembly on the former.  After treatment the glove or glove lining may be washed and dried on the former and then dyed.
Patent GB-754673-A (GB)
Title: Improvements in or relating to alkylation of naphthalene
IPC: C07C2/68
Filed: 1954-04-27
Abstract: Isopropylnaphthalene containing at least 75 per cent of the beta isomer is prepared by contacting 30-50 molecular proportions of propylene with 100 molecular proportions of propylene in the presence of 0.5 to 5 molecular proportions of aluminium chloride at a temperature of 55-150 DEG  C. and continuing the contacting of the reaction mixture after equilibrium has been set up for a period of time not exceeding the time to reach equilibrium and subsequently separating the isopropylnaphthalene by fractional distillation.  The beta-isopropylnaphthalene may be oxidized to the corresponding hydroperoxide which may then be cleaved by an acid catalyst to beta-naphthol and acetone.  The reaction is preferably carried out in a non-aromatic saturated hydrocarbon solvent having a boiling point less than 150 DEG  C. such as propane, butane, pentane, hexane, or octane or mixtures, the solvent may be up to ten times the weight of the naphthalene. The reaction time may vary from about 1 to 50 minutes.
Patent GB-540431-A (GB)
Title: Improvements in or relating to thermostatic switch arrangements
IPC: H01H37/52
Filed: 1940-07-29
Abstract: 540,431. Thermal switches. COLDAIR, Ltd., and WRAY, E. J. July 29, 1940, No. 12273. [Class 38 (v)] A thermal switch comprises a bi-metal strip 7 in good thermal contact with the object the temperature of which is to be controlled such as an electric iron, and a pair of contacts, one 17 of which is mounted on a spring strip 12 and arranged to be moved away from the other 18 on flexing of the bimetal strip by a rod &c. 19 of rigid heat-insulating material such as glass, the ends of which butt respectively against the bi-metal strip 7 and the contactbearing spring 12, but are not connected thereto. The other contact 18 may also be mounted on a spring strip 13 the free end of which may be varied in height, to vary the operative temperature by means of a cam 22, movable from the outside. By this arrangement the bi-metal strip carries no current. Specifications 452,562, 491,390, and 501,583 are referred to.
Patent GB-721317-A (GB)
Title: Improvements in or relating to towel dispensing apparatus
IPC: A47K10/28
Filed: 1952-05-15
Abstract: 721,317. Towelling dispensers. AMERICAN LINEN SUPPLY CO. May 15, 1952 [Sept. 22, 1951], No. 12296/52. Class 18. A towelling dispenser has the drive from the measuring roller 34 to the towelling take-up driving roller 35 transmitted through a spring 96 so that the take-up of the towelling only occurs after dispensing has begun and is only gradually applied. The rollers 34, 35 are mounted between two plates 25, 26 enclosed in a cabinet by top and bottom covers 6, 7 which co-operate to form an opening 12 through which the towelling is withdrawn to form a bight beneath the dispenser. The towelling is fed from a supply roll 47 over the measuring roller 34 in contact with which it is held by a pinch roller 37. The measuring roller 34 and towelling take-up drive roller 35 are connected by chain and sprocket gearing, the spring 96 being interposed in the form of a coil on the shaft of the drive roller 35. An arm 90 and stop 92 are provided for limiting the amount the spring can be wound and unwound. The fabric take-up roller 36 sits upon the take-up drive roller 35 by which it is rotated by frictional contact, the gradual. application of the drive to the take-up drive roller reducing the .amount of slip between it and the take-up roller. This permits a smooth take-up and a more even tension during take-up between the roller 36 and the smoothing device 61 ... 63. The smoothing device which comprises a pivoted arm 67, is held in operative position by bars 75 which are engaged by the cover 7 when it is closed. A time delay mechanism is provided and comprises a pair of vacuum cups one of which is mounted on a vertical slide and adapted to engage a rotatable stop secured to the end of the shaft of the measuring roller.
Patent GB-598256-A (GB)
Title: Improvements relating to concrete and other moulded structures
IPC: E04B2/86
Filed: 1945-05-16
Abstract: 598,256. Walls formed with permanent shuttering. DUBOIS, L. J. May 16, 1945, No. 12305. Convention date, March 25, 1943. [Classes 20(iv) and 87(i)] [Also in Group XXI] In a wall construction, particularly applicable to a dam, using elements, which form part of the finished structure, as shuttering, the elements are formed with at least one appendage or rail, which penetrates into and is embedded in a mouldable material so as to form an anchorage for the element, during the pouring of the material and prevent the overturning of the element by the pneumatic pressure of the material. The elements, as shown, comprising a panel 1 with a rail 2 of frusto conical or frusto pyramidal form, suitably shaped to offer resistance to the swelling of the mouldable material, are arranged in a row with the foot 3 of each rail resting on a bed 4 of stones or concrete. The material e.g. concrete is then cast in situ and a further row of elements positioned above the first with a packing 7 of plastic material inserted between the bevelled edges 6 of the elements, and another course of concrete is cast. The edges of the elements are formed with stablising means such as the heels 8. The plane face of the panel constitutes a lining and may be formed of suitable resistant material dependent upon the nature of the attack to which it will be subjected. When formed of concrete, the elements are suitably reinforced.
Patent GB-1402504-A (GB)
Title: Telecommunications exchange line circuit
IPC: H04M3/00
Filed: 1973-03-14
Abstract: 1402504 Automatic exchange systems PLESSEY CO Ltd 30 Nov 1973 [14 March 1973] 12309/73 Heading H4K In an exchange having a line circuit for each subscribers line l, supervisories assignable to calls terminating at a subscribers line, a switching network and a normally free-running pulse generator generating a recurrent cycle of scanning pulses comprising an individual scanning pulse in respect of each line, each line circuit includes first, second and third transistors T1-T3 to the bases of which the scanning pulse appropriate to the line is applied (at S), a line relay L and a cut-off relay K. When the subscribers line is looped L is energized, closing L1, so that when a scanning pulse occurs T1 becomes conductive, producing, after a persistence check to confirm its genuine nature, a line calling signal at LC. When a supervisory has been assigned to a line circuit an earth signal is applied to terminal P. Relay K is thereby energized and the consequent change-over of contacts K1, K2 connects the line to contacts A, B (and thence to the switching network), and also cuts off the line relay L. Simultaneously a line engaged signal is generated at LE, T2 becoming conductive, and an identifying signal is produced at M, T3 becoming conductive.
Patent GB-382884-A (GB)
Title: A process for the treatment of precious metal-containing materials
IPC: D06P5/15
Filed: 1932-04-29
Abstract: In the electrolytic recovery of metals from material containing precious metals, e.g. that obtained by fusing goldsmiths' waste, copper and silver are deposited at the cathode as sludge, from which the copper is removed by leaching with dilute sulphuric p  acid, preferably after an oxidizing calcining treatment.  From the solution copper sulphate is obtained by evaporation and crystallization.
Patent GB-592487-A (GB)
Title: Ethylene polymerisation processes
IPC: C08F10/00
Filed: 1943-07-30
Abstract: In polymerizing ethylene at elevated temperatures and pressures in the presence of an aqueous medium and oxygen or a substance yielding oxygen, the pH of the aqueous medium is raised above 7 by the presence of alkali.  Benzene or chlorobenzene may also be present, as described in Specification 592,486.  Specified substances yielding oxygen are hydrogen, lauroyl, tetralin, urea, butyryl, acetyl and acetyl benzoyl peroxides, persuccinic and peracetic acids and alkali metal persulphates, perborates and percarbonates.  Suitable alkalies are sodium, potassium and barium hydroxides, lime and sodium and potassium phosphates e.g. trisodium phosphate dodecahydrate, carbonates, borates, acetates and borax.  The process may be used for interpolymerizing ethylene and propylene, butylene; 1,1- and 1,2-dichloroethylene, 2-chloroprene-1; tetrafluoroethylene; methyl and propyl vinyl ethers; methyl and ethyl vinyl ketones; vinyl chloride, acetate, chloroacetate, propionate and thiol acetate; N-vinyl phthalimide, vinyl carbazole; methyl vinyl thioether, methyl vinyl sulphone, vinyl sulphonic esters; styrene, stilbene; acrylic and methacrylic amides, nitriles and esters, e.g. ethyl, propyl, butyl and amyl acrylates and methacrylates, methylene diacrylate and dimethacrylate; methyl a -chlorocrotonate, diethyl itaconate; butadiene, isoprene, chloro-2-butadiene-1,3; limonene and camphene. The process may be operated continuously, e.g. by mixing ethylene under pressure continuously with water and passing the mixture in a turbulent state into a reaction vessel with alkali which may be injected separately or together with the mixture.  Specification 471,590 also is referred to.
Patent GB-573942-A (GB)
Title: Watch movement
IPC: G04B15/10
Filed: 1943-07-30
Abstract: 573,942. Watches. JEANNERET, H. July 30, 1943, Nos. 12414 and 12415. Convention dates, Dec. 4, 1942, and May 31, 1943. [Class 139] A watch movement particularly for use in apparatus for controlling electric circuit-breakers has a socalled constant power escapement comprising a main spring, an escape wheel and a rotatable retarding weight in driving connection with the mainspring and yieldingly coupled to the escape wheel by an auxiliary spring driving the escape wheel. In the form shown in Fig. 1, a wheel 1 connected to the mainspring (not shown) drives a pinion 2 to the axle of which is fixed a wheel 4 and disc 5. The wheel 4 through a pinion 11 drives a retarding weight 13 on an axle 12. The disc 5 carries a pin 6 passing up through the spokes of a wheel 3 loose on the axle of the pinion 2 and engaging a pinion 9 of the escape wheel 10. An auxiliary spring 7 wound round the axle bears at one end against the pin 6 and at the other end against a screw 8 on the wheel 3. The impulse transmitted to the escape lever comes only from the auxiliary spring 7 as the retarding weight prevents the driving force developed by the mainspring from acting upon the escape wheel. To augment the force absorbed, a coupling similar to the auxiliary spring 7 may be arranged between the retarding weight and a slotted disc on the axle 12. In the form shown in Figs. 4 and 5, the retarding weight 23 is arranged in series with the auxiliary spring 27 and escape wheel 25. The escape wheel is loosely mounted on the axle 24 and has a hub 26 to which the inner end of the spring 27 is attached, the outer end being held by a pin 28 on the weight 23. A spring pin 29 placed on the weight passes between the spokes of the escape wheel.
Patent GB-870510-A (GB)
Title: Improvements in valve operating mechanism for internal combustion engines
IPC: F01L1/12
Filed: 1959-04-14
Abstract: 870,510. Valve gear. WALDRON, F. B. April 7, 1960 [April 14, 1959], No. 12546/59. Addition to 812,303. Class 7(6). The valve mechanism of the parent Specification as modified by the addition of an intermediate lever 36 rotatably mounted on a pivot 35 at one end of the valve lever 18 and which acts to average the movements of the two cams.
Patent GB-899687-A (GB)
Title: Novel polyamides and the manufacture thereof
IPC: C08G69/14
Filed: 1960-04-08
Abstract: A polyamide comprising recurring units of the structural formulae <FORM:0899687/IV (a)/1> and <FORM:0899687/IV (a)/2> is made by heating at polymerization temperatures, in the presence of water as catalyst a mixture of 2,3- and 6,7-cyclopentanooenanthlactams.  The process may be continuous or discontinuous and may be effected in the presence of acidic or basic molecular weight stabilizers.  Two examples are given.
Patent GB-258517-A (GB)
Title: Improvements in detachable heel constructions
IPC: A43B21/51
Filed: 1926-05-17
Abstract: 258,517. Mayorowitz, M. May 17, 1926. Protectors, securing.-A detachable heel lift 3, Fig. 2, has beaded pins 21 which are inserted in the larger ends of slots 14 in a plate 4 attached by a spacing member 2 to a heel 1. The lift 3 is slightly pressed against the plate 4. and given a lateral movement causing the heads of the pins 21 to ride into spring seats 13 in the slots 14. A pin 22 on the lift 3 meanwhile engaging a spring finger 19 in the plate 4, rides into an opening 20 of the spring finger, and locks the parts against accidental displacement. To release the lift, a tool is inserted through an eyelet 27 in the spacer 2, to engage a cam face 51 on the spring finger and so raise it free of the pin 22 on the lift 3. The spring seats 13 in the plate 4 may be divided from the plate for a portion of their circumference, by a slit 16, but in a modification, Fig. 9, this slit is omitted. The seats may have a central depression 15, but in another modification they may be omitted. The lift 3 may have a plate 23 embedded in it to which the pins 21 are riveted. Recesses 25 may be provided in the lift 3 to act as suction cups to grip the surface of the plate 4. In another modification, Fig. 13, the lift 3 has a pin 21 projected through it, and expanded at the lower end 32. The pin co-operates with a spring finger 33, corresponding to the finger 19, except that this finger is shorter and has an upturned end 34 against which the pin 21 bears to prevent retrograde movement of the heel lift.
Patent GB-865151-A (GB)
Title: Improvements in or relating to dust separators
Inventor: ASHMAN ROBERT
IPC: B04C3/00
Filed: 1958-04-22
Abstract: 865,151. Centrifugal separators. DUST CONTROL PROCESSES Ltd. April 20, 1959 [April 22, 1958], No. 12709/58. Class 23 A cyclone separator having an inlet 14, and a gas outlet tube 15 has a baffle 17 which may be adjusted axially so that its smaller end enters the tube. The separator which may be incorporated in a multicyclone may also have a tagential, axial, or part tangential and axial inlet.
Patent GB-709786-A (GB)
Title: Improvements in or relating to the cutting of woollen and like materials
Inventor: ALEXANDER ERIC
IPC: A41H3/00
Filed: 1952-05-20
Abstract: 709,786. Cutting-out garments &c. ALEXANDER & CO., Ltd., E. Jan. 7, 1953 [May 20, 1952], No. 12766/52. Drawings to Specification. Class 141 A lay of lengths of woollen &c. material is cut in accordance with a desired pattern by placing a pattern on a gummed sheet, transferring as by pencilling, the configuration of the pattern to the sheet, attaching the gummed sheet to the top length of material and cutting as indicated by the sheet. The gum on the sheet may be thermoplastic e.g, a dried solution of shellac in methylated spirit, the sheet being attached by heat and pressure e.g. by an iron or heated roller. Several copies of the pattern may be taken by carbon paper. on superposed sheets.