baber/WOPTO huggingface dataset:
Patent GB-985013-A (GB)
Title: Improvements in or relating to thermomotive electric switches
IPC: H01H61/06
Filed: 1963-07-16
Abstract: 985,013. Thermal switches. B. FISHER. (Lehigh Valley Industries Inc.). July 16, 1963, No. 28129/63. Heading H2B. The rate of cycling of a thermal " flasher " switch comprising a snap-acting vane stressed by a thermal element, such as that disclosed in Specification 761,713, is maintained substantially constant with variation in applied voltage or ambient temperature by means of a further thermal element which actuates contacts to insert a shunt across the first thermal element. A rectangular vane 10 having a thermally expansible ribbon 20 stretched across a diagonal is supported on a post 31 and a contact 25 is carried on the centre of ribbon 20 for cooperation with a fixed contact 35 on a post 22. Current passed from post 22 via contacts 25, 35, through the two halves of ribbon 20 in parallel to the vane 10 and post 31 causes the ribbon 20 to expand and allow vane 10 to snap overcentre, thereby opening contacts 25, 35. The ribbon 20 then cools until the vane 10 snaps back to close the contacts. A bimetal strip 40 is secured at one end to a post 32 which is in connection with post 31 and hence vane 10. One end of a heater coil 45 is connected to post 32 and the other end has a flexible connection to post 22. Thus when contacts 25, 35 are open the voltage across them is applied to heater 45. A resilient strip 50 of high resistance material is welded to the centre of ribbon 20 and extends as shown, such that a contact 55 on its end overlies a contact 60 on vane 10. When the applied voltage exceeds a predetermined value the heater 45 causes strip 40 to bend and connect its specially shaped end 43 to contact 55 (Fig. 6, not shown). This puts the series resistance of strips 40 and 50 in parallel with the ribbon 20 to reduce the current therethrough and prevent an increase in cycling rate due to the higher voltage. At a still higher value of applied voltage the strip 40 bends further to press contact 55 into engagement with contact 60 (Fig. 7, not shown), ribbon 20 thus being shunted by the lower resistance of strip 50 only. Between and above these voltage values the increasing pressure of strip 40 on contact 55 and subsequently of contact 55 on contact 60 provide extra control by the lowering of contact resistance. The bending of strip 40 is also dependent upon ambient temperature and thus compensates for the effect of this on the action of ribbon 20.
Patent GB-395350-A (GB)
Title: Improvements in change speed gearing
IPC: F16H61/02
Filed: 1931-10-10
Abstract: 395,350. Change-speed gearing. CHAMBERS, J. H., 4, Harberton Park, Belfast. Oct. 10, 1931, No. 28191. [Class 80 (ii).] Variable-speed gearing comprises an epicyclic train h, g, f and means associated with a layshaft l for driving and stationing alternatively the sun gear h which is loose on a driven shaft d. The lay shaft l is constantly driven by a pair b, k from a driving-shaft a. Splined on a boss c of the gear b is a dog clutch member c<2>. Planets g are supported on pins g<2> in a flange e rigid with the shaft d. Rigid with the sun h is a gear i constantly meshed by a gear n which is loose on the shaft l and has dog ends for engaging alternatively a clutch member m<2> fast on that shaft and a dog o rigid with the gear casing. Fourth speed is a direct drive obtained by engaging the dog clutch c<2> with projecting ends of the pins g<2> which are squared for the purpose. For third speed, the sun gear h is held fast by engaging the gear n with the dog o, and the internal ring f of the planetary train is driven from the shaft a by engaging the clutch c<2> with dogs f<1> on the ring f. For second speed, the clutch c<2> is moved to neutral and the ring f is held fast by dogs q provided for the purpose. The dogs q are pivoted on a support wand are adapted to engage the dogs f of the ring f. At the same time, the sun gear h is driven through the layshaft by engaging the gear n with the dog clutch m<2>. For first speed, the sun gear h is driven as above, but the ring f instead of being held fast is driven reversely by sliding in an idler p to connect external teeth f<2> on the ring with a pinion m on the layshaft l. Reversed drive is obtained from the slow backward drive of the ring f by holding, the sun h fast by sliding the gear n to engage the dog o. If it is desired to take the drive from both ends of the gear box, the drive may be applied to an extension a2 of the shaft l and the driven shaft d may be extended to project at d<3> from the left side of the gear box as well as from the right side. A selector device is described for operating the clutches two at a time as required. In a modification, the first forward speed is omitted, there being no external teeth f<2> and no pinion m. An idler is interposed between the gears corresponding to n and i so that the loose sun h is driven at a slow reverse speed from the layshaft which is used for reversed drive when the ring f is held by the dogs q, and for lowest forward speed when the ring f is driven by the clutch c<2>.
Patent GB-298133-A (GB)
Title: Fine-adjusting device for lifts, hoists, and the like
IPC: B66B1/36
Filed: 1928-10-02
Abstract: 298,133. Vulkanhammer Maschinenfabrik Dr. Ing. H. Geitmann, (Assignees of Hoffmann, A.). Oct. 3, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Electric plant. - When the cage is stopped accurately at a floor the contacts 3, 4 on it are in the position shown, but if the cage when travelling upwards does not stop until it has passed a floor at which it is intended to stop, the contact 3 will run on to the cam 5 and be forced in to close the contacts 38, 39. Current now passes from the positive main through the leads 30, 40, contacts 38, 39, lead 41, and coil 11 to the negative main. The energizing of the coil 11 closes the contacts 15, 18, 16, 19, 17, 20 thereby reversing the motor. As the cage switch is in neutral position current passes from the lead 30 to the negative main through the lead 42, brake magnet 23, lead 43 and contacts 17. The brake magnet applies the brake 29 and opens. the contacts 36, 37 thereby inserting a resistance 24 in the motor circuit. The cage travels slowly downwards until the contact 3 runs off its cam. When this occurs the current will be cut off and the cage stopped level with the floor. The contact 4 and cam 6 effect the return of the cage to floor level if it over-runs when travelling downwards.
Patent GB-1401395-A (GB)
Title: Wound electrical capacitors
IPC: H01G9/00
Filed: 1973-06-14
Abstract: 1401395 Capacitors SIEMENS AG 14 June 1973 [19 June 1972] 28305/73 Heading H1M In a wound capacitor (Fig. 2, not shown) the contact element 5 of the electrode 2 of one polarity is located only at its centre, and the contact element 6 of the other electrode 4 is located at one end thereof. Optionally electrode 4 may have a second contact element 7 at its centre, so that, on the case of an electrolytic capacitor for use in a computerized photographic flash unit, contact elements 5 and 6 are connected to the quench circuit to provide high inductance for limiting the quench current, while 5 and 7 are connected in the flash circuit providing low inductance. The capacitor may comprise two anodes each contacted at the centre or an end according to where the cathode contact is located.
Patent GB-793697-A (GB)
Title: Improvements in the delustring of cellulose acetate materials
Inventor: GRADY DENNIS
IPC: D06M13/256
Filed: 1954-10-01
Abstract: Textile material composed of acetone-soluble cellulose acetate is treated with a hot aqueous solution containing at least 0.75 c.c. per litre of hydrogen peroxide of 130 volume strength and an anionic surface-active detergent or an alkalimetal soap.  The solution may be at 97 DEG  to 100 DEG  C. and have a pH of 7 to 9.5.  The surface-active compound may be a water-soluble salt of an acid sulphate or acid phosphate of a monohydroxy aliphatic hydrocarbon containing at least ten successive carbon atoms, for example, lauryl sulphate, palmityl sulphate, stearyl sulphate, oleyl sulphate or the sulphate of an alcohol mixture obtained by reduction of coconut oil fatty acids.  When the solution contains an alkali metal soap, the treatment may be followed by treatment with an alkali metal salt of a long chain alkyl sulphate.  In the example, a cellulose acetate fabric is treated with a soap solution at 85 DEG  C. and then with a solution containing soap and hydrogen peroxide at 99 DEG  C., followed by scouring at 65 DEG  C. in a solution containing ammonia and a fatty alcohol sulphate.
Patent GB-383717-A (GB)
Title: Improvements in or relating to duplicate-writing appliances
IPC: B41L3/02
Filed: 1931-10-12
Abstract: 383,717. Book - - keeping appliances. GILBERT, A., 101, Goswell Road, London. Oct. 12, 1931, No. 28339. [Classes 16 and 146 (i).] A book - keeping appliance for writing in duplicate comprises a supporting - plate 1, Fig. 2, for a pad of record sheets, means for clamping the pad on the supporting- plate, and a backing- sheet 3, for insertion between the record sheets, mounted on the supporting-plate by rigid arms hinged to the backing-sheet and to the supporting-plate. The plate 1 may be made of aluminium and is provided with filing-posts 2 to fit corresponding holes in the record sheets. The clamping-means 5, 6, 7 for the record sheets is similar to that described in Specification 309,248, [Class 16, Books &c.]. The backing-sheet 3 may be made of metal, celluloid, &c., and is provided along its left-hand edge with stop or registration means consisting of a shoulder formed by a marginal strip 4, which may be a separate strip of metal, celluloid or the like fastened or cemented to the sheet 3, or a portion of the sheet 3 itself bent over and pressed against the upper surface. If desired, instead of the marginal strip a row of pins may be provided, or projections may be stamped up from the sheet 3. The stop or registration means serves to register the position of account sheets or individual cards placed on the backing- sheet 3 to receive a copy of writing made on the record sheets. The sheet 3 is hinged to the plate I by means of wire arms 12 bent at rightangles at their ends to engage under bearing straps riveted to the corners of the sheet 3, and beneath the plate 1 at points spaced inwardly from its right-hand edge. The sheet 3 is thus capable of a transverse movement in relation to the plate 1 and also of an angular movement about the right-hand edge. In a modification, the backing-sheet 3, Fig. 6, is capable of a longitudinal movement relative to the plate 1 and an angular movement about the right-hand edge. Each hinge connection between the sheet 3 and plate 1 comprises a flat metal arm 13 hinged at 14 to the end edges of the plate 1, and hinged at 15 to a triangular plate 16 in turn hinged at 17 to the sheet 3. The whole appliance may be fastened at its right-hand edge in the centre of a cover consisting of a leather folder having a flap wide enough to cover the back of the appliance and provided with a metal hook passing through slots in the flap and attached to a short length of elastic secured on the inside of the flap. This hook is adapted to engage over the left-hand edge of the appliance. Used record sheets may be folded round the left-hand edge of the plate 1 and inserted beneath the flap for protection. The top flap of the folder is adapted to be folded over the top record sheet when the appliance is not in use. The record sheets may be carbonized on their backs, or separate sheets of carbon paper may be used.
Patent GB-779937-A (GB)
Title: A selective firing device for land mines
IPC: F42C7/06
Filed: 1955-10-05
Abstract: 779,937. Land mines. ALSETEX SOC. ALSACIENNE D'ETUDES ET D'- EXPLOITATION. Oct. 5, 1955 [Oct. 6, 1954], No. 28382/55. Class 9 (2). A firing device for land mines comprises a body 1 and a cap 2 relative displacement of which is produced in successive stages by the passage of loads to effect operation of an igniter at a predetermined stage which is regulable at will. Within the body 1 is a partition, the part 10a having a dependinng portion bearing on a deformable sealing ring 3 to form a chamber communicating through a valve 6, 7 with a fluid reservoir 5. From the chamber 4 fluid can pass through a channel 9 and a valve 8 into the space between the partition and an elastic membrane 11, this space having communication with the reservoir 5 through narrow passages 12. Above the membrane 11 is an igniter 14, detonator 15 and a relay 16. A single load passing over the device causes relative displacement of the body 1 and cap 2 so that fluid passes from the reservoir 5 through the valve openings 6 and into the channel 9 with consequent deformation of the membrane 11. The fluid returns slowly to the reservoir through the channels 12 and the device returns to its initial state. If successive loads are applied, the fluid enters the channel 9 more rapidly than it can be returned by the channels 12 and the deformation of membrane 11 increases until a thrust is applied to the igniter 14 which causes firing of the mine. The detonator 15 may be inserted when the device is to be used, a plug 17 and packing 18 being used to close the detonator recess. The partition 10a may have a shearing groove 19, so that when a heavy pressure is applied to the device, e.g. when the mine is set in light soils, the partition ruptures at the first impact and operates the igniter immediately. The device may be made of non-magnetic materials such as ethyl-cellulose, styrenes, phenoplasts and aminoplasts. The fluid may be liquid or gaseous. In a modification, the elastic membrane 11 is replaced by a rigid partition which may have an annular weakening or be held by shear pins adapted to fracture at a given pressure. Alternatively, the partition may be free, the igniter being set to move at a given pressure on the partition. The firing device A is mounted in a mine, Fig. 3 filled with explosive B, the base of the mine being supported on a plate 23 by a flexible member 24.
Patent GB-843424-A (GB)
Title: Improvements in and relating to the polymerization of aliphatic olefins and the resulting polyolefins
IPC: C08F10/00
Filed: 1958-09-04
Abstract: A low pressure process for the polymerization of aliphatic olefins comprises contacting an aliphatic olefin with a catalyst comprising oxides, as hereinafter defined, of chromium, aluminium and silicon the ratio by weight of alumina to silica being from 15 : 85 to 40 : 60.  Oxides are defined as including both free oxides and those present in chemically combined for e.g. silicates. Specified olefins are ethylene, propylene and their mixtures.  The polymerization may be carried out in the liquid phase.  The preferred proportions of alumina to silica are from 20 : 80 to 35 : 65 and the chromium oxide content from 0,1 to 10%. Specifications 804,641 and 804,642 are referred to.ALSO:A catalyst for low pressure aliphatic olefin polymerization, comprises oxides of chromium, aluminium and silicon, the ratio of alumina to silica being from 15:85 to 40:60.  Oxides is defined as including both free oxides and those present in chemically combined form e.g. silicates.  The preferred ratio of alumina to silica is 20:80 to 35:65 while the preferred chromium oxide content is from 0.1 to 10%.  The alumina/silica starting material may contain fluorine.  Specifications 804,641 and 804,642 are referred to.
Patent GB-159000-A (GB)
Title: Improvements in devices for instruction in golf strokes
IPC: A63B69/36
Filed: 1919-11-17
Abstract: 159,000. Edgar, J. D. Nov. 17, 1919. Golf-practising appliances.-A device, preferably made of rubber, which may be secured to the ground for use in practising golf strokes comprises a single curved bar A having pivoted thereto a tee-carrying strip B. A straight bar D is provided for guiding the heel of the club and an additional bar E may be added when using irons. In making a stroke, the head of the club should pass between the bars A, D without touching.
Patent GB-652337-A (GB)
Title: Improvements in or relating to centrifugal fans
IPC: F04D17/16
Filed: 1948-11-04
Abstract: 652,337. Centrifugal fans. ELECTRO LUX Ltd. Nov. 4, 1948, No. 28648. Conven tion date, Nov. 7, 1947. [Class 110(i)] In a centrifugal fan, for use in a vacuum cleaner, of the type comprising an impelle having a centrally disposed inlet at on side and an outlet at the periphery, baffle disposed alongside the impeller a the side thereof opposite the inlet, and housing for these :parts having an inlet co operating with the impeller inlet, the dia meter of the baffle is greater than that the impeller, and the ratio of the product of the diameters Dh and Ds of the housing and baffle respectively to the product of the diameters dh and dw of the housing inlet and impeller inlet respectively is equal to or greater than 11 but smaller than or equal to 19. A two-stage fan is shown in Fig. 3, but there may be one or more than two underlying the invention are set forth in stages. The mathematical considerations the Specification.
Patent GB-942169-A (GB)
Title: Improvements in or relating to cylinder head arrangements for internal combustion engines
IPC: F02F1/30
Filed: 1961-08-08
Abstract: 942,169. Auxiliary combustion chambers. MOTOREN-WERKE MANNHEIM A. G. VORM. BENZ. ABT. STAT. MOTORENBAU. Aug. 8, 1961 [Aug. 11, 1960], No. 28689/61. Heading FIB. A cylinder head arrangement for an internalcombustion engine comprises an air-cooled cylinder head 1 that includes a base plate 8, an auxiliary combustion chamber body 16, there being an orifice 19 for placing the auxiliary combustion chamber in communication with a cylinder space of the engine, an internal yoke 2 fixed in the cylinder head and including a ring 3 and arms 6 extending outwardly from the ring, and fixing bolts 10 detachably securing the body to the head the bolts being screwed into the arms and engaging an external yoke via nuts screwed on the bolts and the body being clamped between the ring and the external yoke by means of the nuts and bolts. As shown the yoke 2 is cast in the light metal cylinder head. The insert 11 and yoke 2 are preferably of heat resistant steel or cast iron.
Patent GB-1472083-A (GB)
Title: Reusable coffee filter
IPC: A47J31/06
Filed: 1974-06-28
Abstract: 1472083 Coffee filter INTERELECTRIC AG 28 June 1974 [12 July 1973] 28812/74 Heading A4E A reusable coffee filter comprises a hot water container 1 and a filter strainer, 5 made of perforated sieve sheets arranged adjacent an opening 4 in the container bottom, the filter being characterized by a distribution plate 11 supported by the edge of an upper opening in the container 1 and having holes 12 distributed over an area vertically above the opening 4. The container 1 has a conically inclined bottom 3 and the filter strainer 5, which is sealingly inserted in the opening 4 in the bottom 3, is shaped frusto-conically, the edge of opening 4 having a downwardly facing recess (6) Fig. 2 (not shown) in which the upper edge (7) of the strainer 5 fits. The distribution plate 11, at the top of the container, has a flat, projecting rim 13 whose height is smaller than 1/3 of that of container 1, and which includes a shoulder 14 which rests on the upper edge of the container 1 and is provided with protrusions 15, equally spaced circumferentially. A cover 16, supported on the plate 11 by a flange 17 has a handle 18 which serves as a grip, as shown, or as a deposit plate for the filter strainer, the recess of handle 18 receiving a plastics ring (10) which secures together sheets (8) and (9) Fig. 2 (not shown).
Patent GB-666236-A (GB)
Title: Machines for balling slivers used in preparing fibers for spinning
IPC: D01G15/62
Filed: 1948-11-05
Abstract: 666,236. Sliver-balling machines. SACOLOWELL SHOPS. Nov. 5, 1948 [Sept. 4, 1948], No. 28840. Class 120(i) A sliver balling machine comprises a rotary drum for revolving a ball by surface contact, a support for holding the ball in contact with the drum, separate means including a presser foot resting on the ball for guiding a sliver into position to be wound on the ball, mechanism for relatively traversing the presser foot and the drum, and means acting through the support to hold the ball yieldingly but firmly pressed against the drum, as the ball builds up. As shown, Fig. 3, a single drum 2 drives a number of balls 3 spaced along the machine. Each ball 3 is wound on a tubular core 6 supported on a sleeve 7 rotatable in ball bearings on a shaft 10 carried by an arm 11 pivoted at 13. Arm 11 is engaged at the pivot by adjustably spring-pressed friction discs which offer constant resistance to upward movement of arm 11 as the ball grows, and thus serve to press the ball against drum 2. A sliver S is led to each balling head through a horn 28, one or more times around a rod 30 and through a tapered guideway in a presser foot 29 which rests on the surface of the ball. The sliver is thereby guided along a curved path such that no straight length of sliver longer than the fibre length is placed under tension. Each assembly 28, 29, 30 is pivotally carried by a bracket 31, all such brackets being secured to a sleeve 32 which is reciprocated on a rod 33 to traverse each sliver on its ball so as to produce a cross-winding. Reciprocation of sleeve 32 is effected by means of a sprocket wheel 38, Fig. 4, geared to the shaft 5 of drum 2, which sprocket engages pins 37 on a cross-head 34 connected by a rod 47 to a bracket 48 on sleeve 32.
Patent GB-1198934-A (GB)
Title: Laser Irradiation Apparatus
Inventor: BLIN JEAN
IPC: B23K26/03
Filed: 1968-06-18
Abstract: 1,198,934. Lasers. EUROPEAN ATOMIC ENERGY COMMUNITY. 18 June, 1968 [26 June, 1967], No. 29022/68. Heading H1C. [Also in Division G2]  An apparatus for irradiating a specimen with a laser beam which passes through a shielding wall 11 between an emitter 12 and the specimen by means of an afocal system in a bent duct, has a second optical system 4 to 7 with part of its axis in the duct parallel to the laser beam and an eye piece 16 on the same side of the wall as the emitter 12 and a movable mirror system 8 which can reflect the optical axis of the second system into coaxial relation with that of the first system and so that the image point of the second lies on the axis of the laser beam. The laser beam is generated in a rod (19), Fig. 2 (not shown), made of neodymium, passes through the afocal system (20), is reflected at a mirror 1 and focused by means of a converging lens 3. The second optical system contains a reflecting prism 8 pivotable to shift the axis of the optical system into that of the laser system and this prism can be moved to the position shown in dotted lines to be out of range of the laser beam. The magnification of the optical system may be altered by changing two lenses 13 between reflecting prisms 14, 15. A specimen is attached to a carrier 9 which is adjustable in three orthogonal directions and observed through the eye-piece 16 and the prism 8 is tilted to the position shown in Fig. 1a to enable the carrier to be adjusted. The prism is then tilted out of the position shown and irradiation carried out. To ensure that the laser beam and the image point of the optical system coincide an observation instrument 18 is provided which can be pivoted into the path of the rays and is inserted between the emitter 12 and the duct. This instrument comprises a light source (27), Fig. 2 (not shown), a condenser (28) and an aperture 29 arranged to direct a spot of light by way of a lummer cube (23), a laser lens (20), a mirror (21) back to cross-hairs in an eye-piece (26). The apparatus is used largely in nuclear physics.