baber/WOPTO huggingface dataset:
Patent GB-536504-A (GB)
Title: Improvements relating to change-speed mechanism
IPC: F16H63/44
Filed: 1940-03-15
Abstract: 536,504. Variable-speed gearing. SINGER MOTORS, Ltd., and SHORTER, L. J. March 15. 1940, No. 4842. [Class 80 (ii)] In a change-speed gear-box incorporating an auxiliary change-speed mechanism which is operable hydraulically, a unit. which is adapted to be secured against one face of the gear-box, comprises a pump, a hydraulic accumulator, a hydraulic mechanism which can be connected to actuate the auxiliary change-speed mechanism, and a valve means controlling the admission of fluid pressure to the hydraulic mechanism. The invention is shown applied to gear boxes as described in Specifications 536,502 and 536,503. The clutch member 35, see Figs. 1 and 2 of Specification 536,502, is operated by a swinging lever 34 actuated by hydraulic means under the control of the gear-shift lever 37. The hydraulic means. which is built as a unit, is secured to the underside of the gear box and includes a pump actuated by an eccentric 49 on the layshaft, an accumulator 38, and a hydraulic cylinder 40 having a piston 41 connected to the lever 34. Ball valves 55, Figs. 6 and 7, actuated by members 56a, 56b extending into the bottom of the gear casing control the flow of pressure fluid to opposite sides of the piston 41. The members 56a, 56b, can be operated by pivoted arms 58 engaged by slidable rods 61 extending through the gear box and having inclined faces 62a, 62b at their upper ends. A block 63 spring biassed to a central position has inclined faces which can co-act with the faces 62a, 62b, and a slot 65 (Fig. 1 of Specification 536,502) so that it can be moved by the gear shift lever 37 only in a transverse direction. The apparatus has three selector bars 69, 70, 72 ; the bar 69 is for second and third speeds, 70 for the first speed, and 72 for reverse driving. After the gear-shift lever 37 has been moved to engage third speed, i.e. direct drive, further movement of the lever 37 in the same direction moves the block 63 to the left, Fig. 7, to depress the rod 61 and hence the rod 56a to allow pressure fluid in the accumulator 38 to pass to the left-hand end of the hydraulic cylinder 40. Movement of the piston 41 pivots the lever 34 anti-clockwise and the clutch member 35 engages the casing to lock the sun 32. This gives an overdrive. When the lever 37 is engaged with the bar 72 for reverse drive the block 63 is moved to the right, Fig. 7, and the resulting movement of the rod 56b causes pressure fluid to act on the right-hand side of the piston 41 and thus hold the clutch member 35 against the annulus 28.
Patent GB-1049925-A (GB)
Title: Reinforced moulded fibre mats
IPC: E04C2/284
Filed: 1964-01-16
Abstract: 1,049,925. Laminates. WEYERHAEUSER CO. Jan. 16, 1964 [Feb. 1, 1963], No. 2003/6 4 Heading B5N. A method of producing moulded wood fibre mats reinforced by a layer of metal, e.g. aluminium or brass, comprises punching holes which provide burrs for keying to the mat in the metal layer, steaming the mat, which may have already been moulded to the required shape, positioning the metal layer over, the steamed mat and hot pressing in a mould to bond them. together. The wood fibre mats preferably consist of defiberized lignocellulose derived, e.g. from. cane, straw, bark or wood, and. mixed: with a resin binder system which may comprise a thermoplastic material e.g. asphalt, gilsonite, cellulose ethers, cellulose esters, coumarones; coumarone-indenes, polyvinyl resins, alkyds, polystyrenes rosin, and a thermosetting resin such as urea formaldehyde or phenol formaldehyde. Alternative cellulosic materials: suitable for making the mat include sawdust, shavings, wood flour and various chemically produced cellulose pulps. The mats may be produced by defiberizing wood chips, adding the resin to the resulting fibres, drying and continuously felting the dried fibres into a low-density mat which is then predensified. In an embodiment, only one half of a layer of metal is perforated, e.g. with a nail, and that half is bonded to a fibre mat as above. The unperforated tab may be used for attachment to other structures.
Patent GB-1416044-A (GB)
Title: High-frequency switch and commutator switch equipped with  semiconductor diodes
IPC: H01P1/15
Filed: 1973-01-15
Abstract: 1416044 Gating circuits TAVKOZLESI KUTATO INTEZET 15 Jan 1973 [19 Jan 1972] 2120/73 Heading H3T [Also in Division H1] In a semi-conductor diode gating circuit the capacitance of series diodes when conducting is resonated by series inductance and the capacitance of shunt diodes when reverse biased is resonated by parallel inductance. In Fig. 3, when the voltage V 1  is positive with respect to K, current flows through R5 and R6 to forward bias series diodes Kr2 and Kr4 to connect high frequency lines A1 and A2 together. Shunt diode Kr5 is reverse biased. When the voltage V 1  is negative the series diodes Kr2, Kr4 are reverse biased and the shunt diode Kr5 is forward biased by current flowing from the diode via L5, R7 and Kr9. The lines A1 and A2 are therefore decoupled from each other. In this condition diodes Krl and Kr2 are also forward biased and these connect terminating impedances R1, L1, C1 and R2, L6, C2 to lines A1, A2. To reduce the impedance of the series diodes when conducting, ferrite rings are placed around the diode leads to increase the inductance sufficiently to series resonate the diode capacitance at the upper end of the transmission frequency range. To increase the impedance of the shunt diode when non-conducting the diode capacitance is parallel resonated by inductor L5. CL1-CL5 provide capacitance or capacitance-inductance filter connections for the D.C. circuit but the fillers may be omitted when K is at earth potential. Fig. 4, not shown, illustrates a changeover gate and Fig. 5 (not shown) a simplified arrangement. The components may be arranged in cavities in a metal or conductively coated plastic block, Figs. 1 and 2, not shown, the diodes Kr1-Kr4 being arranged in diagonal channels and the block being closed by a conductive or conductively coated lid.
Patent GB-224128-A (GB)
Title: Improved otter trawl board
IPC: A01K73/045
Filed: 1924-01-28
Abstract: 224,128. Stephen, P., and Lewis & Sons, Ltd., J. Jan. 28, 1924. Trawling - gear, - An otter-board has one or more narrow slots 6 which extend transversely across the board iiorizontally or nearly so. The slots may be inclined from face to back of the board, either so as to tend to produce a lifting action on the board, or in the reverse direction, or may be horizontal,
Patent GB-952046-A (GB)
Title: Absorption refrigerating machine
IPC: F25B15/06
Filed: 1963-01-17
Abstract: 952,046. Refrigerating. TRANE CO. Jan. 17, 1963 [Feb. 15, 1962], No. 2189/63. Heading F4H. An absorption refrigeration machine comprises a first chamber operating at high relative pressure and containing a generator 14 and condenser 16, a second chamber operating at intermediate relative pressure and containing a first evaporator 24 and a first absorber 58, and a third chamber operating at low relative pressure and containing a second evaporator 26 and a second absorber 60. The chambers are formed within a single shell 10 by partitions 12, 28, 56 and 57, as shown. Liquid refrigerant, e.g. water, passes from the condenser 16 through an aperture 22 in the partition 12 to the first evaporator 24 which is separated from the second evaporator 26 by the partition 28, the level of liquid refrigerant accumulating in the evaporators being above the bottom of the partition 28 to form a liquid seal. This liquid refrigerant collects in a well 30 whence it is returned to spray nozzles 38 and 40 in the evaporators by a pump 34. The evaporators 24 and 26 communicate through apertures 80 and 78 with the first and second absorbers 58 and 60, respectively, the absorbers being separated by a partition 56 which is spaced from the wall of the shell 10 to provide an opening 62. Absorbent solution can thus pass from absorber 60 to absorber 58 and forms a liquid seal between the chambers. A pump 90 is provided to withdraw strong solution from the generator through lines 82, 86 and 88 and solution from absorber 60 through lines 92 and 88, the combined solution being then supplied through line 94 to spray nozzles 96 in absorber 60. A further pump 100 withdraws solution from absorber 58 through line 98 and supplies part of this solution through lines 102, 108 and 110 to the generator and part through lines 102 and 104 to nozzles 106 in absorber 58. A liquid heat-exchanger 84 is provided. Fluid to be cooled is passed first through pipes 46 in the evaporator 24 and then through pipes 50 in the evaporator 26 while a coolant fluid is passed first through pipes 68 in absorber 60 and then through pipes 78 in absorber 58 (Figs. 3 and 4, not shown). The generator 14 contains heating tubes 18. In a modification (Fig. 2, not shown) an additional pump is provided to supply solution from the absorber 60 to the nozzles 106 in absorber 58, the line 104 being omitted. In this case there is substantially no flow of solution through the opening 62.
Patent GB-1206261-A (GB)
Title: By-pass valve for controlling air flow in an internal combustion engine exhaust system air injector
IPC: F01N3/22
Filed: 1969-01-14
Abstract: 1,206,261. Valves. BORG WARNER CORP. 14 Jan., 1969 [1 Feb., 1968], No. 2211/69. Heading F2V. [Also in Division F1] In an engine having a by-pass valve 10, Fig. 1, for selectively regulating the air flow from a ventilating system to the exhaust system for reducing contaminants, the valve body has an inlet port 19, an outlet port 23, a diversion port 28 and a valve spool 36. The latter has a first hand member which isolates the exhaust port from the diversion port when the valve is in a first position, a second hand member which throttles the exhaust port during movement towards a second position, the valve member being biased to the first position and movable therefrom in response to air pressure acting on the first hand member or by operation of an external actuating device engageable with the spool through a lost-motion connection. Passage 18 is connected to an air compressor (13), Fig. 1 (not shown), passage 24 is connected to the exhaust system and passage 51 is connected to the induction system, ambient air pressure being present in chamber 48. In the Fig. 1 position all the air from compressor (13) is conducted through the by-pass valve to the exhaust system 14. When the engine throttle is closed suddenly a high partial vacuum is created in chamber 49 causing downward novement of diaphragm 47, plunger 66 and valve spool 36 until member 39 seals the exhaust port 23 and member 38 unseats from port 28 allowing the air to pass to atmosphere via silencer 32. The ventilating air system is thereby isolated from the effects of explosive combustion in the exhaust system. Air flow through bleed orifice 59 allows the parts to return to their Fig. 1 position. A flap valve 62, which is normally biased open, permits more gradual changes in the vacuum in chamber 49 without changing the position of diaphragm 47. In a modification the valve spool has an annular throttling land member 139, Fig. 4, on a sleeve 137 which includes a land member 138 whilst the plunger 166 mounts a sealing member 172. In each case the valve spool 36 or (137) is freely slidable on the stem 68 or (168) so that the device can operate independently of the diaphragm actuator to relieve excess pressure at the inlet 18 or (118).
Patent GB-1382393-A (GB)
Title: Combination responsive devices
IPC: E05B37/02
Filed: 1973-01-16
Abstract: 1382393 Combination locks MARCONI CO Ltd 15 Nov 1973 [16 Jan 1973] 2213/73 Heading E2A A combination responsive device comprises a source of light, light-responsive means and interposed therebetween a series of coded apertured shutters which may be adjusted to align the apertures therein to permit light from said source to actuate the light-responsive means. As shown, the device comprises a number of independently rotatable discs 1..6, coaxially mounted on a shaft 7 and separated by low-friction washers, each disc being provided with at least one aperture 8..13 and the shaft having a passage 14 which permits light to travel from a lamp 20, controlled by a switch 22, through a chamber 19 the aligned apertures and a chamber 15 and to a photoelectric detector 17 to activate the same. The assembly forms the hand-grip portion of the handle of a cabinet and connecting leads from the detector to an electrically-actuated bolt in the cabinet allow the bolt to be actuated in response to the electrical output of the detector. The discs have letters or numbers on the peripheries thereof, and the apertures therein are screw-threaded for the reception of grub-screws whereby all apertures in each disc are blocked save for one appropriate to the chosen correct combination.
Patent GB-1260968-A (GB)
Title: Connectable floor mats for gymnastic and athletic purposes
IPC: A63B6/00
Filed: 1970-01-16
Abstract: 1,260,968. Laminates. NISSEN CORP. 16 Jan., 1970 [23 Jan., 1969], No, 2310/70. Heading B5N. [Also in Divisions A4 and E2] Adjoining sections A, B of a foldable gymnastic mat, each section consisting of a shockabsorbing filler 10 of polyethylene foam or hair felt and top and bottom covers 12, 11 stitched together at 15, are detachably secured together to provide a continuous mat top surface by a connector consisting of a slotted tube 18 slidingly engaged over extensions 14a of the top cover. The extensions 14a each have a laterally extending bead and are formed by insertion of a cord 17 into a tube formed by a line of stitching 13, the slotted tube 18 being applied and removed when the two sections are placed one on top of the other. In modifications, each filler 10 is in sections and may be adhered to the cover, or the bead is formed by spaced nylon rivets. Detachable connectors may be used to connect mat portions, consisting of a number of sections which are permanently connected by stitching together the extensions 14a, and may comprise a series of main sections S1, S2, S4, S6, S8 and S10 spaced by connecting sections S3, S5, S7 and S9 which are dimensioned so that the mat is roll-foldable. Other arrangement of roll-foldable sections are described and roll-foldable mats may be connected end-to-end, side-by-side or to an intermediate auxiliary section to provide larger mats, e.g. for wrestling. Specification 1,220,765 is referred to.
Patent GB-781241-A (GB)
Title: Improvements in or relating to wrapping machines
IPC: B65B51/14
Filed: 1956-01-24
Abstract: 781,241. Seaming non-metallic sheet material. SCHWEIZERISCHE INDUSTRIE-GES. Jan. 24, 1956 [March 10, 1955], No. 2322/56. Class 42 (1). [Also in Group XVII] In a machine for wrapping articles T by conveying them against a wrapper 7 which they carry with them through a folding passage 4, 5 jaws are provided for forming a longitudinal seam in the wrapper, one of the jaws being selfaligning. In the embodiment shown, the upper jaw 16 is heated and the lower jaw 23 is mounted to pivot about a pin 22 to an extent limited by bolts 24. The jaw 23 has a working face formed by a rubber or like insert 26. Both jaws reciprocate, the jaw 23 along a path which causes it to be screened from debris falling through the gap 12 in the folding passage, when not in its working position. The end seams are formed in a similar manner to the longitudinal seam. The conveyer dog 2 is arranged to be retracted to position 2<SP>1</SP> during heat sealing. In alternative forms (not shown) the screening may be achieved with a vertically reciprocating lower jaw by causing a movable plate to cover it in its retracted position. Either jaw may be selfaligning and either or both may be heated.
Patent GB-876117-A (GB)
Title: Elevated sectional flooring
IPC: E04F15/024
Filed: 1958-01-23
Abstract: 876,117. Floors. PAWLOWSKI, W. F. Jan. 23, 1958, No. 2328/58. Class 20(4) An elevated floor comprises sections 24 supported at their corners by standards formed of tubes 12 which have means to engage the sections and connect them together. The tubes 12 are mounted on a base 10 by adjustable flanges used to vary the heights of the standards, the tops of which receive parts 16 of circular fixtures having shoulders 18 which abut the ends of the tubes. The fixture extends upwards to a main portion 20 which has downwardly tapering, intersecting slots 22 on its upper surface. The floor sections 24 are provided on their undersides with angle irons 26 which enter and firmly wedge in the slots 22, the sections 24 abutting. In modifications, Figs. 3, 4 (not shown) the fixture has upstanding frusto-conical projections in its upper surface, which enter recesses in the floor sections. In Figs. 6, 7 (not shown) box frames, each having four openings, are placed on the standards, and panels, fitting over the openings, are located edge-to-edge.
Patent GB-633357-A (GB)
Title: Improvements in and relating to pneumatic tyre-valves
IPC: B60C29/04
Filed: 1947-01-24
Abstract: 633,357. Tyre valves. MANUFACTURE DE CAOUTCHOUC MICHELIN. Jan. 24, 1947, No. 2338. Convention date, July 5, 1946. Addition to 633,092. [Class 135] The valve stem 6 of the parent Specification is formed with a seating flange 7 and carries a loose washer 13 which prevents the stem from being screwed too far on the foot 2.
Patent GB-571645-A (GB)
Title: Improvements in or relating to devices for adjusting the field of view in optical apparatus
IPC: G02B23/14
Filed: 1944-02-08
Abstract: 571,645. View-finders. PULLIN OPTICAL CO., Ltd., and BAIGENT, E. W. Feb. 8, 1944, No. 2341. [Classes 97 (i) and 98 (i)] In a variable aperture device for use in a camera or other optical apparatus, two pairs of bars adjustable at right angles for defining the rectangular field of view are carried from plates, all of which lie on one and the same side of the rectangular aperture and are caused to slide over each other in two mutually perpendicular directions. As shown, the device comprises a two-part casing e containing two horizontal bars h<1> and h<2> carried by vertically adjustable plates a and b and two vertical bars v<1> and v<2> carried by horizontally adjustable plates c and d, the size of the rectangular aperture bounded by these bars being varied by the rotation of a disc o carrying pins which co-operate with notches in the plates. In a modification, Fig. 9 (not shown), the plates c and d are driven by a pinion engaging racks on plates c and d, the plates a and b being driven by pins on plates c and d co-operating with inclined slots in plates a and b. The device may be used in a camera in conjunction with lenses of different focal lengths wherein a ledge on each lens co-operates with a lever mechanism to adjust the size of the rectangular aperture, Fig. 19 (not shown).
Patent GB-787718-A (GB)
Title: Circuit for preventing intermodulation interference
IPC: H04J1/12
Filed: 1956-01-24
Abstract: 787,718. Audio-frequency signal receivers. COLLINS RADIO CO. Jan. 24, 1956, No. 2363/56. Class 40 (4). [Also in Group XL (c)] A set of receivers for signals of different frequencies received over the same channel, discriminates against low-amplitude intermodulation frequencies, by causing a genuine signal to develop a back-bias for an amplifier in each receiver sufficient to render it insensitive to the unwanted signals. As shown, each amplifier 26 has its grid circuit tuned to its associated frequency and is biased for class C operation by battery C+. When a genuine signal arrives grid current flows at the positive peaks to develop across the resistance condenser combination 37, 38, a negative bias which is applied to the grids of all the amplifiers, and is sufficient to render them insensitive to the spurious signals but not sufficient to render them insensitive to genuine signals. The anode current pulses of the valves are integrated in condensers 32 to provide operating voltage for a receiving relay or other device 29.
Patent GB-710021-A (GB)
Title: Improvements relating to microporous material
Inventor: DUDDY JOSEPH CHARLES
IPC: H01M50/414
Filed: 1952-01-29
Abstract: Microporous material is prepared by drymixing a powdered synthetic resin and a powdered pore-forming material capable of being subsequently leached out, adding thereto a solvent which is sufficiently active as a plasticizer of the resin to gel the mixture into a cohesive mass, and which is present in amount sufficient for said gelling action and within the absorption capability of the resin in avoidance of surface stickiness, working said mixture at a temperature at which further plasticization of the resin occurs, shaping, leaching out the pore-forming material and drying the resultant microporous material.  Specified resins are polyvinyl chloride, polystyrene, polyvinyl acetals, polyalkyl acrylates and methacrylates, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyethylene, polyisobutylene, polytetrafluorethylene and synthetic rubbers isomerized or chlorinated.  Preferred proportions are 14 parts resin to 24 solvent.  Specified solvents are isophorone, cyclohexanone, tetrahydrofuran and mesityl oxide. Specified pore-formers are starch, and the alkaline and alkaline earth carbonates and bicarbonates, and they may be mixed with water or dilute acid, e.g. sulphuric acid.  A wetting agent such as an alkyl aryl polyether alcohol or an alkyl aryl sulphonate may also be present.  The product may be used for battery separators. Specification 565,022 is referred to.
Patent GB-953675-A (GB)
Title: Accessory for tire shaping and curing presses
IPC: B29D30/06
Filed: 1962-01-23
Abstract: 953,675. Tyre band expansion control mechanisms. UNITED STATES RUBBER CO. Jan. 23, 1962 [Feb. 20, 1961], No. 2388/62. Heading B5A. A tyre expansion and control sensing device for a dual tyre press has a pair of arms 11, each containing adjustable tyre expansion sensing rods 25 slidable against spring 31 upon contact with expanding tyre carcasses L and R to halt the inflation thereof. Arms 11 are mounted on levers 24 pivoted about bearings 12 and rotated into and out of the sensing position between the separable mould sections 19 by the connection of pivotally attached link 14 to cross-bar 13 attached to movable fluid operated piston 15. Upon closing of press timing circuit contacts CR-A, solenoid valve SV-11 is energized to direct pressure fluid to operate piston 15 allowing limit switch LS-14 to open and thereby halt the press closing and opening motor M, and closing switch LS-12 to actuate valve SV-12 to direct tyre expansion medium therefrom and to energize relay CR-1 to open contacts CR-1A and CR-1B which deenergize the solenoid valves SV-13 and SV-14 to permit transmission of the expansion medium to within tyre carcasses L and R. Tyre expansion is controlled individually or separately upon tyre contact with and consequent movement of rods 25 operating the switches LS-L and LS-R to close (or open upon deflation) the valves SV-13 and SV-14 to the transmission of expansion medium. Press timing circuit relay CR-A opens and press timing circuit relay CR-B closes operating valve SV-11 to retract piston 15 which pivots the arms 11 from the sensing position and operates switch LS-12 to terminate the expansion medium flow and recommences press closing motor M upon actuating the switch LS-14.
Patent GB-643402-A (GB)
Title: Tear tape, the use and assembly thereof
IPC: B65B61/18
Filed: 1948-01-27
Abstract: 643,402. Perforating non-metallic sheet material. WINGFOOT CORPORATION. Jan. 27, 1948, No. 2454. Convention date, July 9, 1947. [Class 31 (ii)] [Also in Group XVII] A line of perforations 6 is formed in a wrapper by a rotary tool 10, the pointed portions 11 of which are coated with molten wax so that as each perforation is completed it is sealed by a minute droplet of wax.
Patent GB-638397-A (GB)
Title: Purification of vitamin b
IPC: A61K31/44
Filed: 1948-01-28
Abstract: Vitamin B6 is purified by reacting with boric acid to produce the vitamin B6-borate complex treating with a lower aliphatic alcohol preferably in acidic solution, e.g. methanolic hydrogen chloride to produce vitamin B6 and trialkyl borate, separating the trialkyl borate from said mixture by distillation and recovering the vitamin B6.  A detailed example is given.