baber/WOPTO huggingface dataset:
Patent GB-783615-A (GB)
Title: Diisocyanate-modified polyesters and rubber-like materials derived therefrom
Inventor: ER LAURENCE STEPHEN RAYN
IPC: C08G18/10
Filed: 1954-08-25
Abstract: A material convertible into a rubber is made by reacting a molar excess of a diisocyanate with a polyethylene glutarate of molecular weight at least 1000 and preferably 3000 to 7000. Reaction may be effected in two stages in the first of which less than an equivalent amount of diisocyanate is used and in the second of which additional diisocyanate is dispersed in the composition.  A small amount of water may be present during the reaction and the reaction may be moderated by adding acidic materials, e.g. sulphur dioxide, boric acid, adipic acid, salicylic acid or butadiene sulphone (which decomposes into butadiene and sulphur dioxide).  The diisocyanate modified polyester may be converted into a rubber (a) by heating it with a basic catalyst, e.g. lithium, sodium, potassium, beryllium, magnesium, calcium or barium hydroxide; sodium methoxide or ethoxide; or pyridine, trimethylamine, triethylamine, tripropylamine, tributylamine, triamylamine, tribenzylamine or dimethylaniline and/or (b) by heating with a cross-linking agent, e.g. water, glycerol, triethanolamine, ethylene glycol, 1 : 3-propane diol, 1 : 4-butane diol, ethylene diamine, trimethylene diamine, tetramethylene diamine, m-phenylene diamine, o- or m-dichlorobenzidine, dianisidine, 4,41-diamino-diphenyl methane, naphthylene diamines, tolylene 2,4-diamine, p-aminobenzyl aniline, o- or p-aminodiphenyl-amine, 2-amino ethyl alcohol, 2-amino1 - naphthol, m - aminophenol, glycollic acid, alpha-hydroxy propionic acid, amino acetic acid and amino benzoic acid.  When water is used as cross-linking agent it may be added in the form of a salt containing water of crystallization, e.g. cobaltous chloride hexahydrate or the diisocyanate modified polyester may be made to take up water by heating it in an oven having an atmosphere of low humidity or by exposing it to the atmosphere.  After adding the catalyst or cross-linking agent the composition may be converted into chips, ribbons, films, sheets, fibres, filaments, solutions or dispersions.  When the composition is fluid and a cross-linking agent giving rise to evolution of a gas is used (e.g. water or steam), an expanded material may be obtained by heating in a suitable mould.  The cross-linking reaction may be controlled by methods described in Specifications 767,017 and 773,991.  Carbon black may be added to the reactants during the preparation of the rubber.
Patent GB-703455-A (GB)
Title: Improvements in and relating to controlling devices for gas water heaters
Inventor: BRUEMMERHOFF WALTER
IPC: F23N1/08
Filed: 1951-10-23
Abstract: 703,455. Thermally-actuated valves. VAILLANT, H., [trading as VAILLANT KOMMANDIS-GES., J.]. Oct. 23, 1951, No. 24712/51. Class 135 A control device for gas water heaters in which the gas supply is adjusted automatically in dependence upon the water outlet temperature is characterized by the gas supply being controlled by two thermal elements disposed in the water outlet, one of which increases the gas supply with increasing water outlet temperature during the heating-up period until a desired water temperature is reached whereas the other throttles the gas supply as the desired temperature is exceeded. Water at A passes through ports 38, a valve 2 controlled by a thermal element 3, and a heat exchanger 4 to the outlet D, the pressure drop across the valve 2 being kept constant by a piston 40 controlling the ports 38 and actuated by a spring-loaded pressure-responsive disc 39 in a by-pass around the valve 2. Gas passes from E through a water deficiency valve 43, a valve 7 controlled by two thermal elements 19, 21, in the outlet, a passage 49 and ports 50 to the burner 9, the pressure drop across the valve 7 being kept constant by a sleeve 51 controlling the ports 50 and actuated by a weighted pressure responsive disc 46 in a by-pass around the valve 7. During the heating up period as a desired water temperature, determined by a spring 27 loading a bellows 22 connected to the thermally lagged element 21, is approached the bellows moves a bail 28 downwards to open the valve 7. When the desired water temperature, determined by a spring 30 loading a bellows 20 connected to the unlagged element 19, is exceeded, the bellows 20 raises the valve 7 through a stop 36 away from the bail 28 and closes the valve. When the desired outlet temperature is increased by increasing the loading of the spring 30 through a screw 54, bevel gearing 53 and handle 12, the valve 2 and thermal element 3 are raised by gearing 56 and eccentric 55 to throttle the inflow of water so as to maintain the heat-load of the heater constant, the heat load being the product of quantity of water flowing per unit time and the temperature difference between the inflowing and outflowing water.
Patent GB-1151380-A (GB)
Title: Floatable Reservoir for Lighter-than-Water Liquids
IPC: B63B35/44
Filed: 1966-06-03
Abstract: 1,151,380. Open bottomed reservoir. COMPAGNIE D'INGENIEURS ET TEOHNICIENS D'ETUDES (C.I.T.E.). 3 June, 1966 [4 June, 1965], No. 24777/66. Heading E1H. A floatable reservoir for lighter-than-water liquids has a wall in the form a vertical cylinder which is devoid of ends and has means to make it floatable. As shown in Fig. 2 the ball 1 is rigidly connected to vertical floats 2. The floats may be closed at the bottom and have provision for the entry and pumping out of the water to control the ballasting of the floats and hence the floatability of the wall.
Patent GB-284565-A (GB)
Title: Improvements in or relating to lifting jacks
IPC: B66F3/10
Filed: 1927-09-22
Abstract: 284,565. Powell, A. D., and Bradbury & Sons, Ltd., J. Sept. 22, 1927. Jacks. -A screw jack of the extended lift type has means, such as pawls and ratchet grooves, for positively preventing rotation of the outer screw relatively to the casing until the outer screw reaches its end position in either direction of movement. The casing 3 has vertical grooves 4 adapted to engage the ends of spring-pressed pawls 5 mounted in a recess at the bottom of the outer screw 1. At the end positions of travel of the outer screw, the groove 4 have lateral ratchet shaped extensions 8, 8<a>, Figs. 3 and 4, formed in the casing. To raise the jack, the nut 13 is rotated, as by a pinion 14, so that the outer screw rises until a stop 12 thereon contacts with the nut 13. At this point the pawls enter the upper grooves 8<a> so that the outer screw while the inner screw 2 having Continued rotation of the nut 13 now rotates the outer screw while the inner screw 2 having engaged the load is thereby held against rotation and continues the lift. To lower the jack, the nut 13 is reversely rotated. The outer screw is prevented from rotating by the pawls being in the vertical grooves, or sliding into them, or, if the friction between the nut 9 and inner screw is such as to prevent the nut 9 and therefore the outer screw from rotating, the pawls are released from the upper grooves 8<a> by sliding over the lower chamfered edge 16 of the grooves and the outer screw moves downwards until the stop 15 contacts with the nut 13. At this point the pawls enter the lower grooves 8 so that the outer screw can now rotate and the lowering operation be completed by the rotation of the nut 9 relatively to the inner screw 2.
Patent GB-188465-A (GB)
Title: A new or improved electrical resistance board or panel for tandem lamp circuits
IPC: H05B31/00
Filed: 1921-09-21
Abstract: 188,465. Gascoyne, B. B. Sept. 21, 1921. Regulating switches.-In switches for tandem lamp circuits, such as in kinematograph installations, in which resistance is inserted into one circuit as it is withdrawn from the other, the mechanically connected contact or brush carrying blocks h, h<1>, which slide in opposite directions over the fixed contacts b<1>, c' and bus bars b<3>, c<3>, constitute armatures for electromagnets j which are automatically or otherwise controlled. The carriers h, h' have fixed to them racks p, p<1> which normally engage a toothed wheel r as shown in Fig. 1. Temporary disengagement may however be effected by pressing in the spindle r<1> of the wheel r against spring pressure, when the carriers h, h<1> may both be lowered; a release of the spindle r<1> then locks the switch. The switch may be actuated as in Fig. 1 by attaching a weight o to the top carrier h, then energizing and de-energizing the right and left hand electromagnets j respectively; or the spindle r<1> may carry, at the back of the board a, a pinion r<6>, Fig. 6, which is actuated through gearing by a rocking beam x under the control of additional electromagnets z. Fig. 8 shows mechanism for automatically breaking the circuits of the electromagnets z on completion of their work. On closing the switch 25a the right hand electromagnet z is energized, the beam x rocked and the gearing set in motion. The pin 23 moves in a counter-clockwise direction and finally breaks the circuit at 22. The action may now be reversed by closing the switch 24<a>. Specification 175,118 is referred to.
Patent GB-1445717-A (GB)
Title: Transducer shielding apparatus
IPC: B06B1/06
Filed: 1973-05-24
Abstract: 1445717 Transducer probes NATIONAL RESEARCH DEVELOPMENT CORP 3 May 1974 [24 May 1973] 24998/73 Heading H4J A piezoelectric transducer 1 used as a stress wave emission probe, is shielded from radio frequency interference (R.F.I.) by an electrically conductive housing 6 and an acoustic wave transmitting member interposed between the transducer 1 and the surface of an article under test. The acoustic wave transmitting member has one electrically conductive layer 2 and one electrically insulating layer 3. Layer 2 acts as a R.F.I. shield while layer 3 electrically isolates thd housing from the article under test. Layer 2 is preferably of brass and layer 3 is a ceramic such as re-crystallized alumina or silicon nitride. In the example, alumina of thickness 0À66 Î 10<SP>-3</SP> m. ultrasonically cut to size is cemented to brass shim, 0À05 mm thick, using epoxy resin. The brass shim 3 is soft soldered to a metal ring 5 to provide a threaded cap for the housing 6. The ceramic transducer 1 is cemented with a silvered face on to the brass shim 2 using strain gauge cement. If desired, the adhesive is loaded with fine metal particles. An electrode 7 supported by an insulating plunger 8 is held in contact with transducer 1 by a compression spring 9. The signal from the transducer 1 is matched to the output line by a transformer (not shown) within a compartment 10. An N-type connector 11 to line is provided.
Patent GB-663679-A (GB)
Title: Improvements in or relating to record changing mechanisms for gramophones
Inventor: COSTA HARRY DA
IPC: G11B17/16
Filed: 1949-09-29
Abstract: 663,679. Gramophone record changers. PLESSEY CO. Ltd. Feb. 14, 1950. [Sept. 29, 1949] No. 25033/49. Class 40 (ii). In a record changing gramophone of the kind in which records are supported on a centre post before being released one by one on to the turntable, the centre post has a portion cut away to form a shelf 3 and has a longitudinal slot 2 in which a cam member 4 is moved outwardly by a pin 14 on a plunger 7 to unseat thelowermostrecord from the shelf 3 while supporting the remainder of the records, a retractable member being also disposed in the slot 2 to guide the remaining records over the shelf 3 and to automatically retract into the centre post under the influence of a stationary pin 20 in a curved slot 19 when the records are being withdrawn from the centre post. During the upward movement of the plunger 7 a ball 10 and spring 9 lift the cam member 4 from the position shown in Fig. 1 to the position shown in Fig. 2 so that when the lowermost record is unseated and the remainder fall on top of the cam member 4 the shock of impact is absorbed by the spring 9.
Patent GB-794692-A (GB)
Title: Improvements in tubulous vapour generators
IPC: F22B21/34
Filed: 1956-08-16
Abstract: 794,692. Combustion apparatus. BABCOCK & WILCOX, Ltd. Aug. 16, 1956 [Aug. 18, 1955], No. 25109/56. Class 51 (1). [Also in Group XIII] In a water-tube boiler comprising a furnace lined with steam generating tubes extending from lower headers 20, 22 to a steam and water drum 24 and fired by three horizontal rows of pulverized coal burners 86, the combustion gases flowing upwardly past an arch 36 and then laterally in a pass lined with superheater tubes and in which is disposed the pendent tube banks of a secondary superheater 140, a reheater 180 and a primary superheater 160, 161, 162 to an outlet 218, the furnace is provided with a hopper bottom formed by walls 80, 82 converging downwardly to a throat 84 and is divided into three sections 90, 91, 92 by division walls 94, 96 including closely-arranged or contiguous steam generating tubes connected between lower and upper headers 98, 100 and 106, 108, respectively. Downcomers 102, 104 convey water from the drum 24 to the headers 98, 100 whilst steam-water mixture is delivered to the drum from headers 106, 108 through circulators 109, 110, the drum preferably containing separators of the form described in Specification 526,825, [Group XIII]. The tubes of each division wall 94, 96 are arranged to form a front section 120 and a rear section 122 separated by a gap 124 aligned with the throat 84 of the furnace hopper bottom, the gap providing for pressure equalization between the furnace sections which are each fired by an equal number of burners. Above the arch 36 some of the division wall tubes of each rear section 122 are offset to provide spaces for soot blowers 128, 132. To maintain the steam temperatures constant over a wide range of loads cooled flue gas is withdrawn from the outlet ducting 218 by a fan 192 which delivers it to the throat 84 of the furnace hopper bottom, the quantity of gas recirculated being controlled according to variations in load and steam temperature, for example by systems as described in Specifications 738,021 or 758,374, [Group XIII]. In a modification, the lateral pass is divided into superheater and reheater passes the gas flows through which are controlled to regulate superheat or reheat temperature.
Patent GB-1181223-A (GB)
Title: Improvements relating to Liquid Flow Proportioning Devices
Inventor: TANNER DENNIS CAMERON
IPC: F16L39/00
Filed: 1966-06-06
Abstract: 1,181,223. Regulating fluid-flow. T.K.S. (AIRCRAFT DE-ICING) Ltd. May 3, 1967 [June 6, 1966], No.25148/66. Heading G3H. Liquid flowing through conduit 23 into chamber 22 is discharged proportionally through a series of outlets 25. In the preferred embodiment the rate of flow is determined by the lengths of capillary tubes 29 associated with the outlets, but according to various modifications (not shown) these are replaced by larger tubes containing either calibrated axial rods or needle valves. Figs. 1 and 2 (not shown) illustrate the use of three such devices to feed de-icer to the wings and tail of an aircraft by means of a single pump which feeds each device through a pipe having a length inversely proportional to the expected rate of flow of liquid to the device. Specification 724,019 is referred to.
Patent GB-953426-A (GB)
Title: Improvements in or relating to duplicating machines
Inventor: MATTHEWS STEPHEN
IPC: B41L11/00
Filed: 1959-07-22
Abstract: 953,426. Copying documents. BLOCK & ANDERSON Ltd. July 20,1960 [July 22,1959], No. 25181/59. Heading B6C. A hectographic printing machine comprises a rotatable printing drum 10 formed with a constant radius surface over its area supporting a master image M, a counterpressure member 11 for selective line printing from said image formed by a rotatable element having raised partcylindrical regions 14, 15 extending over its axial length, and means for causing intermittent rotary movement of said element in adjustable timed relationship to the rotation of said drum 10 to pass the region 15 through the printing zone in synchronism with the passage therethrough of any selected text line L1, L2 &c., of the image M. Movement of handle 28 rotates the drum 10 at half the angular speed of the handle, gear-wheel 30 at the same speed as the drum, and gear-wheel 31 at a slower speed so that its lag behind wheel 30 for one revolution equals the angle subtended at the periphery of the drum 10 by one text item L1, L2 &c. The contour of a cam disc 33 secured to gear-wheel 30 causes follower 39, Fig. 1, to rock lever 40 and rotate gear-wheel 56 via an abutment screw, a block 45, lever 46, and eccentric pin 55. Wheel 56 turns pinion 60 and causes the arcuate shell to rotate at the same peripheral speed as the surface of the drum 10 so that its region 14 presses a copy sheet against the heading section H of the master M. When the follower 39 reaches a constant radius section of disc 33 the member 11 is held with the gap between regions 14, 15 in the printing zone. When a plate 50, angularly adjustable by means of a ratchet wheel 47, engages roller 51, gear-wheel 56 and pinion 60 are further rotated via an abutment screw 54, block 45, lever 46, and eccentric pin 55 and region 15 of member 11 passes through the printing zone and impresses a selected text item. The arcuate shell 72 of the member 11 is returned by a spring to its initial position when flat section 19 of the drum is in the printing zone. To effect full copy printing a constant diameter counter roller 16 is raised into printing contact with the drum 10. Cylinder trips.-Rotation of eccentric 83 lifts roller 82 and rotates rocker arms 79, thereby raising the roller 16. The applied printing pressure between the drum 10 and the member 11 may be adjusted by operation of pressure applying means 75 which act on slidable block 73 in which the shafts supporting the member 11 are journalled. Specifications 882,924 and 900,117 are referred to.
Patent GB-738121-A (GB)
Title: Improvements in or relating to variable magnetic electron lenses
IPC: H01J37/14
Filed: 1953-09-11
Abstract: 738,121. Electron lenses. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 11, 1953 [Sept. 16, 1952], No. 25187/53. Class 39 (1). In a magnetic lens for an electron microscope or diffraction apparatus the pole-piece 1, Fig. 1, has an axially movable cylindrical insert 5 which is so shaped as to produce a field which is symmetrical about two perpendicular planes but not rotationally symmetrical; by rotating the insert about the axis astigmatic components of field can be added or corrected, or spherical aberration can be affected. As shown, the threaded insert 5 surrounds a tube 3 made of copper and forming the container of the electron discharge tube. The polepieces are connected by a yoke 4. The insert may have an internal elliptical cross-section, Fig. 2 (not shown), or may be toothed, Fig. 3, or curved sinusoidally, Fig. 4 (not shown), at the end nearest the plane 2.
Patent GB-1180486-A (GB)
Title: Method and Apparatus for Making Programmes for Controlling Textile Machines
IPC: D04B15/66
Filed: 1967-06-01
Abstract: 1,180,486. Programmed control of knitting machines. UNIVERSAL MASCHINENFABRICK DR. RUDOLF SCHIEBER G.m.b.H. June 1, 1967 [June 24, 1966], No.25221/67. Heading G3N. An apparatus for producing a programme for the control of a fabric producing textile machine comprises an optical line scanning means for scanning a pattern discontinuously from one recording position to the next, the programme recording means being supplied from the optical means with an output which is modified to take account of mesh size, properties of the yarn, and strength of the fabric to be produced. The programme carrier may be magnetic tape, photographic film, punched tape, or projections on a chain etc. The initial pattern is produced manually and is scanned in a series of parallel lines by photo-cells 46a-e signals from which are fed into a circuit including a selector switch 41, set dependent on the gauge of the yarn, and further switches 41a-e are set depending on the nature and properties of the yarn, and a switch 43 dependent on the required strength of the knitted material. Assuming the switches are set in the positions shown, a pattern is moved discontinuously in a series of steps relative to a head carrying a number of photo-cells, normally each photo-cell recording on a separate track on the recording medium. The scanning device is provided with a pulse generator comprising a disc interrupting light from a lamp to a photo-cell, pulses from which are applied to a counter 35, which at a determined number moves the head to a new position. The arrangement is stated to be suitable for a flat bed knitting machine provided with jaquard and narrowing attachments.
Patent GB-429145-A (GB)
Title: Improvements in pistons
IPC: F02F3/06
Filed: 1934-09-01
Abstract: 429,145. Pistons. BOHN ALUMINIUM & BRASS CORPORATION, 2512, East Grand Boulevard, Detroit, Michigan, U.S.A. Sept. 1, 1934, No. 25244. Convention date, July 19. [Class 122 (i)] In a piston having an oval skirt, the short axis of which coincides with that of the pin bosses, and a pair of bimetallic expansion controlling elements operative under heat to bend the skirt to circular form each element comprising inner and outer members 16, 20 the former having a lower coefficient of expansion than the latter, each of said inner members extends chordally between the thrust faces and its upper and lower edges extend above and below the pin bosses. The outer members are in the form of webs 20. The inner members may be embedded in, Fig. 1, or may encircle the bosses, Fig. 7, in which latter case lugs 24 on the skirt assist in holding the inner and outer members in contact. Slots 15 separate the head and skirt.
Patent GB-412802-A (GB)
Title: Improvements in and relating to centrifugal casting processes and apparatus therefor
IPC: B22D13/06
Filed: 1933-09-12
Abstract: 412,802. Casting machines. FRITZSCHE, C., 51, Sidonienstrasse, Leipsic, Germany. Sept. 12, 1933, No. 25256. [Class 83 (i).] Thin walled castings of metal or alloy, particularly for dental purposes are made by means of a centrifugal casting-machine operating in a vacuum. The machine may comprise a motor 4 driving a shaft 3 on which is an arm 6 carrying a counterweight 7 at one end and the casting-apparatus at the other, the casting- apparatus comprising an electrically heated mould 11 and crucible 10. The whole machine may be mounted within a chamber 1 which is then evacuated, or, if desired, the driving mechanism may be mounted outside the chamber and operate the casting-apparatus by means of a shaft passing through a gland in the chamber wall.