baber/WOPTO huggingface dataset:
Patent GB-1419111-A (GB)
Title: Photoelectric transducer
IPC: G01D5/26
Filed: 1972-10-26
Abstract: 1419111 Photo-electrically monitoring and controlling movement of an instrument membrane NATIONAL RESEARCH DEVELOPMENT CORP 21 Feb 1973 [24 Feb 1972 26 Oct 1972 24 Nov 1972] 8501/72 49379/72 and 54351/72 Heading G1A In a device for photo-electrically monitoring the displacement of a membrane 1 due to sound or voltage or pressure forces, radiation reflected (or passed through) the membrane is used to provide a signal representing movement of the membrane from its null position, the signal activating electrostatic means which tend to return the membrane to its null position. As shown in Fig.1 (a microphone) light from a solid state device is reflected off the surface of an electrically conductive optically reflective membrane 1 to be received by two photo-detectors 11  and 12 which are axially displaced on either side of the image plane. Thus, if the membrane oscillates the detectors will produce a periodic signal of the same frequency but 180 degrees out of phase with respect to one another. The amplified outputs of the detectors are taken via phase detecting means 15 which control electrostatic elements 17 and 18 via a gain control 16, to try and maintain the membrane 1 in its null position and the feed back signal required to do this is also fed via amplifying equipment to activate a loud speaker or recording equipment.  In a modification of Fig. 1 a voltage comparator Fig. 2, (not shown), the outside electrostatic electrode 17 (which receives the voltage to be tested) is positioned further away from the membrane and the feedback signal is supplied to the inside electrostatic electrode 18. In Fig 3 an interferometric system senses the membrane's movement wherein a reference signal formed from the light source 7, mirror 25 and detector 27 is compared for phase difference with a measurement signal formed from the light source 7, membrane 1 and detector 23. The phase difference signal then being processed as before.  In a further embodiment Fig. 4 (not shown), a source with an associated lens system and a detector with an associated lens system are placed equidistantly on either side of the membrane. The central area of the face adjacent the membrane of each lens system is arranged to be fully reflecting and the source and detector are arranged to be optically conjugate so that there is a zeropath difference for the two associated systems when the membrane is in the null position. The membrane in this and other embodiments may be oscillated by applying a sinusoidal voltage to the electrostatic electrodes and any exterior forces acting on the membrane will amplitude modulate the oscillations of the membrane, the signal from them being demodulated by conventional circuitry or by providing the bias of the detector with an identical sinusoidal voltage variation so the output of the detector will then be a signal directly representing the magnitude and direction of the membrane under the action of the force to be measured.
Patent GB-1067437-A (GB)
Title: Improvements relating to manufacture of tri-butyl tin monochloride
Inventor: OAKES VINCENT
IPC: C07F7/22
Filed: 1963-12-13
Abstract: Tributyltin monochloride is prepared by mixing equimolar proportions of tetrabutyl tin and stannic chloride without applying external heat and then subjecting the mixture to rapid heating so as to remove by flash distillation from the mixture, the monobutyl tin trichloride which is formed.  The tributyltin monochloride may then be distilled separately under reduced pressure and hydrolysed with caustic soda to form the oxide.  The by-product mono-butyl tin trichloride is recycled into the manufacture of tetrabutyl tin either by a Grignard technique or by the use of alkyl aluminium compounds.
Patent GB-1486240-A (GB)
Title: Detachable connectors for pipes
IPC: F16L33/22
Filed: 1974-11-14
Abstract: 1486240 Pipe connectors FESTO-MASCHINENFABRIK GOTTLIEB STOLL 14 Nov 1974 [14 Nov 1973] 49399/74 Heading F2G [Also in Division B3] A detachable connector for pipes comprises a connecting piece with an axial projection which has an outer surface part defining with the free end of the projection a part conical generatrix, and a coupling nut which can be screwed on to the connecting piece by a thread towards one end of the nut, the latter having a cylindrical section at the opposed end and apart conical section between the cylindrical section and the threaded section, the cone angle of the part conical section of the coupling nut being greater than the cone angle of the part conical generatrix of the axial projection of the connecting piece, the inner diameter of the nut being greater than the external diameter of a pipe to extend therethrough, contact between the pipe and nut being effected only at the transitional edge between the conical and cylindrical surfaces of the nut. In one form, the flared end 12, Fig. 1, of a metal pipe 3 has the same angle of taper as the frusto-conical end 4 of a connector 1 on to which is screwed a nut 2 having a frusto-conical inner surface 9 whose angle of taper is a multiple of the angle of taper of the flared pipe end, 8. The nut 2 grips the pipe 3 only at a rounded transitional edge 14 between a cylindrical surface in the nut and the frustoconical surface 9. The pipe may alternatively be of plastics, Figs, 2, 3 (not shown). The metal pipe end is flared by inserting a tapered mandrel which acts on clamps holding the pipe to increase the clamping force the further the mandrel is inserted, Figs. 4-6 (not shown) see Division B3). The tapered frusto-conical end of the connector may be spaced from the adjacent thread by a recessed ring-shaped portion (32), Fig. 7 (not shown), to form a stop (32a) adjacent the thread. In another embodiment, a connector 42, Fig. 8, has a bulge 46 with a surface 50 of arcuate section, and tangents touching the arcuate surface 50 and the adjacent free end of the connector define a frusto-conical generatrix having a cone angle less than the cone angle of a frusto-conical surface 49 in a nut 45. An annular washer 53 of rubber, &c. 53 lies inside the nut 45 and against the surface 49. A similar washer may lie between the flared end 41 of the pipe and the end of the connector 42.
Patent GB-1339330-A (GB)
Title: Scintillation camera with resolution
IPC: G01T1/164
Filed: 1971-10-26
Abstract: 1339330 Scintillation camera NUCLEARCHICAGO CORP 26 Oct 1971 [27 Oct 1970] 49595/71 Heading H4F To improve the resolution of a scintillation camera, e.g. an Anger camera 40, Fig. 5, a radiation filter 20 having a plurality of spaced apertures is mounted between the radioactive object 10 and cameras detector head, and an optical filter 70 having a similar array of apertures but of smaller dimension than the apertures in filter 20 is mounted between the CRT display screen 61 of the Anger camera's output and a photographic camera 80, and the two filters 20 and 70 are synchronously scanned, e.g. as shown in Fig. 7b, where 211, 212 &c. comprises the apertures in filter 20 and 711, 712 &c. the apertures in filter 70. Instead of using an optical filter 70 an electrical analogue thereof may be included in the detective electronics 50 (Fig. 6, not shown). Filter 20 may constitute the conventional multichannel collimator or such collimator 30 may be included as shown. The size and separation distance of the apertures in the filters are preselected in terms of the full width at half maximum resolution value of the camera to produce a desired improvement in resolution (Fig. 3c, not shown).
Patent GB-1363423-A (GB)
Title: Fittings for wiring of buildings
IPC: H02G3/14
Filed: 1971-10-20
Abstract: 1363423 Switch covers BRITISH INSULATED CALLENDER'S CABLES Ltd 20 Oct 1971 [20 Oct 1970] 49802/70 Heading H1N [Also in Division H2] An electrical fitting such as a switch or socket is attached to a wall or other support. Over the front plate 1 is fitted an ancillary cover-plate 4, which conceals mounting screws in holes 2. Plate 4 may be attached by means of one or more ridges 7 which make a snap fit with slots 8 in the fitting, or by means of one or more spigots which make a snap fit in holes in the fitting, or it may be a tight fit on plate 1. Plate 4 has one or more holes to expose a socket, switch rocker, or other component to which access is required after installation. Plate 4 may be resilient. It may be made of polypropylene, polystyrene, or stainless steel. It may be made by moulding or vacuum forming.
Patent GB-1004657-A (GB)
Title: Improvements in or relating to the drawing of synthetic polyamide yarn
Inventor: LAWRANCE DEREK ROBERT
IPC: D01F6/60
Filed: 1963-12-17
Abstract: 1,004,657. Drawing polyamide yarn. BRITISH NYLON SPINNERS Ltd. Dec. 17, 1963, No. 49867/63. Heading B5B. In drawing polyamide yarn, in the solid state, the yarn, prior to being drawn is brought into contact with an atmosphere whose humidity is sufficiently high to raise the water content of the yarn to a level which is at least 10% higher, and preferably at least 100% higher, than the level of yarn water content which would be in equilibrium with the water content of the ambient atmosphere during drawing at the same temperature. The humid atmosphere may be air containing water vapour and having, for example, a relative humidity of at least 85%, or steam. The yarn may pass round a snubbing pin situated between the feed roll and the draw roll. In an example, a cake of undrawn polyamide monofilament is placed in a box containing air having a relative humidity of 87% and is thereafter drawn using a snubbing pin at a draw ratio of 4À7 at 1500 feet per minute, the temperature and relative humidity of the ambient atmosphere being 22 C. and 57% respectively. The drawn yarn is completely free from nubs. In another example, a polyamide yarn is drawn with a snubbing pin at a draw ratio of 4À7 and a speed of drawing of up to 4000 ft. per minute. The yarn on its way to the snubbing pin is passed through a tube 12¢ inches long filled with steam. The drawn yarn is completely free from nubs.
Patent GB-1129895-A (GB)
Title: Improvements in or relating to a metal support coated with casting layers for the manufacture of films and sheets
Inventor: STEFFENS EDWARD MARIUS
IPC: C11D3/48
Filed: 1965-11-24
Abstract: 1,129,895. Coated metal. GEVAERT-AGFA N.V. 8 Sept., 1966 [24 Nov., 1965], No. 49881/65. Headings B2E and B2K [Also in Divisions B5 and C3] A casting surface for preparing films and foils by casting a film-forming solution thereon is prepared by coating a metal support with a solution of cellulose acetate, evaporating the solvent, hydrolyzing the cellulose acetate layer formed, and applying thereto a solution in a mixture of water and of a water-miscible organic solvent of (A) polyvinyl alcohol having at most 20% of residual vinyl ester units, (B) a water-soluble amino-resin and (C) 10%-20% acid, whereby a coating on the hydrolysed cellulose acetate surface of 0.01 Á to 5Á thickness is obtained, and heating the coating for 4 to 8 hours at 100 to 120‹C to cure the amino resin. The amino resins used are urea, melamineformaldyhyde resins, dimethylol urea, trimethylol or dimethylol melamine. The aminoresin is said to react during curing with free hydroxyl groups of the hydrolysed cellulose acetate surface. Preferred acids are maleic. citric, oxalic acid. The polyvinyl alcohol, amino resin, acid solution may be applied by roll coating, dip-coating, or knife-coating. The metal support may be the metal drum or endless belt of a film casting machine. In the Examples casting layers are applied to the endless belt of a film casting machine, and films of cellulose triacetate are cast from solution.
Patent GB-1064975-A (GB)
Title: Improvements in and relating to diazotype reproduction
IPC: G03C1/60
Filed: 1964-03-19
Abstract: 1,064,975. Heat developable diazotype materials. KEUFFEL & ESSER CO. March 19, 1964 [March 19, 1963], No.50143/66. Divided out of 1, 64,974. Heading G2C. A heat-developable, two-component diazotype material comprises a support coated or impregnated with a diazonium compound, an azo coupler, a hygroscopic substance or optionally a substance to prevent pre-coupling and in the same or adjacent or a backing layer, an amine activatable at a temperature of no more than 185‹C. and optionally an amine activation promoter, the amine being of formula R1-NH-R2 wherein R1 is alkyl, pentahydroxyhexyl, carbethoxy alkyl, NH2-CO-alkyl- CO2H, arylguanyl, aminoguanyl, 2-diallylamino- 4-amino-s-triazinyl-6, thiazolyl or pyridyl and R2 is hydrogen, alkyl or guanyl or R1 and R2, together with the NH group to which they are attached form a heterocyclic ring. The specified hygroscopic substance and amine activation promoter is trichloracetic acid.
Patent GB-1104341-A (GB)
Title: Improvements in or relating to poultry batteries
IPC: A01K31/04
Filed: 1964-12-10
Abstract: 1,104,341. Poultry batteries. JOHN SHEPHERD & SONS Ltd. and R. B SHEPHERD 9 March, 1966 [10 Dec., 1964], No. 50227/64. Heading A1M. In a poultry battery having tiers 11-13 of cages and movable members such as a food trolley 14 and ploughs or scrapers 17 a flexible drive transmission 18 is provided passing over a driving pulley 20 and upper and lower guide pulley 19a, 19b located in the plane of the pulley 20 the upper pulley 19a being biased away from pulley 20 in order to take up slack in the run of the transmission extending from the pulley 20 to either of pulleys 19a, 19b. The driving pulley 20 comprises a sprocket wheel. The flexible transmission 18 is preferably a chain and each pulley 19a, 19b is provided with an annular groove extending radially inwardly from the base of the pulley groove whereby twisting of the chain as it runs on and off sprocket wheel 20 is prevented. Pulley 19a is mounted on a lever arm 21 pivoted at 22 to the battery frame 10 and is loaded by a compression spring 23. Alternatively pulley 19a may be mounted on a spring loaded bracket.
Patent GB-1440357-A (GB)
Title: Method for making amorphous semiconductor films
IPC: C03C3/32
Filed: 1973-10-29
Abstract: 1440357 Vapour depositing semi-conductor material INTERNATIONAL BUSINESS MACHINES CORP 29 Oct 1973 [26 Dec 1972] 50285/73 Heading C7F An amorphous semi-conductor material, e.g. As 2  Te 3  is vapour deposited on to a substrate 53 of e.g. quartz through an Al mask from a source body 40 which has a surface area at least as great as the substrate, and the distance from the substrate is no greater than the smallest dimension of the source surface. The lowest vapour pressure constituent of the material is at least 0.885 x 10<SP>-8</SP> for the ratio P/(MT m )<SP>¢</SP> where P is the v.p. in Torr of the lowest v.p. constituent at a temperature less than the melting point of the semi-conductor material, M is the molecular weight of the constituent and Tm is the melting point of the material. Two sources may be used to deposit materials containing e.g. Ge, Si, Cu, Ag such as Ge-Te-As.
Patent GB-1468362-A (GB)
Title: Alkylation of p-aminophenol
IPC: C07C215/76
Filed: 1974-10-24
Abstract: 1468362 Alkylation of p - aminophenol KODAK Ltd 24 Oct 1974 [30 Oct 1973] 50333/73 Heading C2C A method for the preparation of a compound having the formula wherein R and R 1  are the same or different alkyl radicals having from 1 to 16 carbon atoms, or together with the carbon atoms to which they are attached form a carbocyclic structure having from 5 to 10 carbon atoms in the ring comprises reacting a ketone of formula with p-aminophenol monosulphate and sulphuric acid, or with p-aminophenol bisulphate and catalytically hydrogenating the resulting amine. By "p-aminophenol monosulphate" is meant the addition salt formed by two molecules of p-aminophenol and one molecule of sulphuric acid.
Patent GB-1214388-A (GB)
Title: Cabinet for electrical equipment
IPC: H05K7/18
Filed: 1968-10-23
Abstract: 1,214,388. Mounting electrical equipment. INTERNATIONAL STANDARD ELECTRIC CORP. 23 Oct., 1968 [26 Oct., 1967], No. 50371/68. Heading H1R. [Also in Division A4] An electrical equipment enclosure comprising two side walls and top and bottom parts is provided on the inside wall of each sidewall with uniformly distributed horizontal guiding grooves constituted by profiled bars which are welded to the side wall and into which sliding nuts are inserted and with the aid of which one or more mounting rails for supporting the equipment can be screwed in any arbitrary position. Identical metal side walls 4 of cabinet 1, Fig. 1, are each bent off at their longitudinal edges to form U-shaped portions 12, Fig. 2c, and both ends of each side wall are terminated by rails 14, 15 through which screws 6 pass to secure top and bottom portions 5 to the side walls 4. The portions 5, Fig. 3a and Figs. 3b, 3c (not shown), are each in the form of a trough having its edges bent off in a U-shaped manner 23 and into which are welded straps 24 provided with flaps 25 constituting a passage for screw 6. Flaps 25 are so dimensioned that when the enclosure is assembled they fit between the rails 14, 15. Equally distributed throughout the length of the sidewalls 4 are three members welded thereto provided with guiding grooves 17 into which sliding nuts are inserted and to which are clamped in any suitable position mounting rails 17 for sub-assembly groups 7 such as drawers. If heavy equipment is to be mounted in the cabinet 1 two mounting rails 19 are screwed to the side rails 4 and additional guide rails 21 are attached to rails 19 by screws 22. For mounting smaller units only one rail 19 is used mounted at the front or rear of the cabinet, Figs. 2b, 2a (not shown). The bottom portion 5 may be attached to the side walls 4 by hexagonal screws or if castors are used the screws are replaced by bolts. The portion 5 may be in the form of a frame, Figs. 4, 6 (not shown), in which case a cover plate is screwed to the straps 24 which cover plate may be U-shaped to enable a cable to be led into the cabinet. Several cabinets may be connected in a row Fig. 7 (not shown) in which case the partition walls 4 are of reduced depth to enable a direct horizontal wiring among the cabinets.
Patent GB-1488539-A (GB)
Title: Process for the preparation of hydrocarbon resins
IPC: C08F240/00
Filed: 1975-12-09
Abstract: 1488539 Hydrocarbon resin SOC ITALIANA RESINE SIR SpA 9 Dec 1975 [20 Dec 1974] 50405/75 Heading C3P [Also in Division C5] A modified hydrocarbon resin completely compatible with n-hexane is prepared by polymerizing with a Friedel-Crafts catalyst a mixture of (1) 40-80 wt. per cent of an unsaturated hydrocarbon cut of boiling range 130-240‹ C. obtained by steam cracking and (2) 60-20 wt. per cent of dodecene (or a C 9 -C 15  olefin mixture of average carbon number about 12). The dodecene may be propylene tetramer. The catalyst may be AlCl 3 , AlBr 3  or BF 3 . The resin product may have a Gardner viscosity of C to S and a melting point of 50-100‹ C.
Patent GB-1357738-A (GB)
Title: Plastics fasteners
IPC: F16B21/08
Filed: 1970-10-26
Abstract: 1357738 Stud-and-socket fasteners ITW Ltd 26 Oct 1971 [26 Oct 1970] 50783/70 Heading E2B A plastics stud fastener for engaging in a hole 10 in a plate has at least one barb having a concave surface which engages the corner of the plate and which accommodates different plate-thicknesses and hole-sizes. The concave surface may comprise several planar facets, but as shown is smoothly curved. In the form shown in Figs. 1, 2a and 3, designed for round holes, the barbs 16, 18 have pairs of concave surfaces 26, 28 and 30, 32 respectively set at an angle appropriate to engage the circumferential edge 22, 24 of the hole. In the form shown in Fig. 4, a single barb 16a engages in a square hole 10a.
Patent GB-1394440-A (GB)
Title: Handball for mounting on a control lever and including a fluid flow control vlave
IPC: E02F9/20
Filed: 1972-11-03
Abstract: 1394440 Earth working machines KOEHRING CO 3 Nov 1972 [4 Nov 1971] 50855/72 Heading E1F [Also in Divisions F2 and G3] A handle 10 removably mounted at 12 to a control lever 14; e.g. of an earthmover, contains duplicate valve assemblies in parallel bores 16, 18. the valve assemblies being operable by camming levers 20, 120 pivoted to the handle at 22, 122. In the idle position shown, fluid from supply conduit 60 leaking past balls 56, 156 into signal chambers 46, 146 can escape to exhaust 66 since closure members 40, 140 are clear of their respective seats 44, 144. Operation of either lever depresses plunger 24 or 124 causing spring 30, or 130 to bias the closure member 40 or 140 onto its seat and simultaneously unseat ball 56 or 156, the effect being to establish in the signal chamber 46 or 146, and the associated signal port, a control pressure related to the force applied to the lever 20 or 120. As shown in Fig 7, air is supplied to the handle from pressure regulator 200 and one signal port is connected to a relay valve controlling one servomotor 206 of a directional control valve 208, the opposing servomotor being controlled in like manner by the pressure in the other signal port. Ram 210 then moves at a speed controlled by operation of levers 20, 120 the handle may be detached from the lever 14 to allow the operator to control operation of the earthmover from an alternative point, e.g. when the earthmover is digging a trench and the operator is unable to see the bottom of the trench from the cab.
Patent GB-1168653-A (GB)
Title: Nestable Containers.
Inventor: MCCORMICK ROBERT JAMES
IPC: B65D21/02
Filed: 1966-11-14
Abstract: 1,168,653. Nestable containers. DOW CHEMICAL CO. 14 Nov., 1966 [15 Nov., 1965], No. 50942/66. Heading A4A. [Also in Division B8] A thin-walled plastics container, e.g. of polystyrene, has an annular section provided at intervals with projecting members 26, the remainder of the annular section having a less pronounced reverse taper than the members 26 and consequently a narrower ledge (28), Fig. 4 (not shown) at the lower edge of the section. The members 26 are designed to prevent adjacent containers in a stack from jamming. The container may also be of expanded polystyrene, or a laminate of plastics foam with paper or with plastics film. A snap-on lid may be fitted after the containers are separated.