baber/WOPTO huggingface dataset:
Patent GB-1525867-A (GB)
Title: Projectors
IPC: G03B21/28
Filed: 1975-12-31
Abstract: 1525867 Optical projectors THD MFG Ltd 10 March 1977 [31 Dec 1975] 53260/75 Heading G2J As shown in exploded view, the body 1 of a projector has the slide carrier removed and replaced by a clip-on attachment for projecting images from transparencies such as microfilm or microscope slides. The attachment has two parts, one bent at right-angles into sheets 12, 13 and the other 20 with bent-up lugs 22, the parts being hinged at 19. Light from a source in body 1 passes through an aperture 14 in plate 12, is reflected by a mirror 18 carried on a plate 17 fixed to plate 12 through an aperture 15 in plate 13, through a lens 27 in a mount 26 carried between lugs 22 and is reflected by mirror 25 carried by lens mount 26. Focusing is by a knob 33 on a shaft 31 with an eccentric pin 29. Upper part is raised about hinge 19 to insert a transparency, which is then held in position by the weight of the upper part 20 and the parts carried thereby.
Patent GB-1452428-A (GB)
Title: System for detecting earth or alternating voltages in  telephone exchanges
IPC: H04Q3/54
Filed: 1974-12-10
Abstract: 1452428 Automatic exchange systems INTERNATIONAL STANDARD ELECTRIC CORP 10 Dec 1974 [27 Dec 1973] 53325/74 Heading H4K A subscriber's line is tested for false earth potentials and for interfering A.C. potentials each time the line is taken into use, the tests being performed at a "common unit" to which the line is connected during one stage of a call. In a first embodiment the test equipment is incorporated in a digit receiver (Fig. 2, not shown). When a calling line has been connected through to the receiver, central control (UC) interrogates an A.C. detection circuit in the receiver to determine whether an A.C. voltage in excess of 50 Volts is present on either wire. If such a voltage is present the receiver is dropped and tested in undisclosed manner for damage. The calling line and line circuit are also put out of service and a teleprinter is used to output a fault message. If no A.C. voltage is present dial tone is sent, and during the dialling phase an earth detection circuit is used to monitor the wires for earth potential on one, the other, or both of the line wires. Should the central control detect an earth fault condition, the line is put out of service or is parked. In the embodiment of Fig. 3, the test circuits are incorporated in a local junctor. Earth potential detection circuits TC1, TC2 are provided respectively on the calling and called sides of the coupling capacitors Ca, Cb and line split contacts KC3, KC4, whereas an A.C. detection circuit TD is only supplied on the called side. During a call establishment the called line is checked for the presence of an A.C. voltage, and if no such voltage is detected, ringing current is supplied to the line by circuit CD. Circuit TD can then be used to test that the ringing current is present. During the call, the circuits TC1, TC2 monitor the earth conditions of a respective one of the two lines whilst circuit TD monitors the A.C. voltage on both lines. In the presence of a high A.C. voltage both lines are put out of service whereas for an earth fault only the corresponding line is parked. No details of the test circuits are given. It is also stated that path check circuitry may be provided for checking the path through the network RC, but again no details are given. The arrangements have particular application to exchanges with electronic switches.
Patent GB-1181569-A (GB)
Title: Improvements in or relating to Boards.
IPC: E01B9/68
Filed: 1967-11-24
Abstract: 1,181,569. Laminates. LES ISOLANTS FRANCAIS. 24 Nov., 1967 [28 Nov., 1966], No. 53552/67. Heading B5N. A composite sound and vibration board comprises two superposed component boards, each having a plurality of longitudinally-extending recesses on its internal surface, the longitudinally-extending recesses in one of the component boards being opposite the longitudinally extending recesses in the other of the component boards, and a longitudinally-extending component disposed in each pair of opposed recesses, the depth of the longitudinally-extending component being substantially equal to the depth of the pair of opposed recesses. In preferred embodiments the recesses or troughs are of substantially trapezoidal cross-section with a component of substantially square cross-section and having a longitudinally extending aperture or of hexagonal cross-section. In addition the outer surface of each component board may have recesses or troughs, e.g. of triangular, rectangular or sinusoidal cross-section. The composite board is preferably formed of an elastomeric material.
Patent GB-536284-A (GB)
IPC: H01H51/32
Abstract: 536,284. Electric control systems. SMITH, R. M. A., WOOLNOUGH, G. L., PRICE, D. R., and METROPOLITAN VICKERS ELECTRICAL CO., Ltd. Jan. 15, 1940, No. 894. [Class 40 (i)] In a control system in which receiving equipment selectively responds to currents of two or more frequencies injected into a conductor system such as a supply network, the control frequencies are sent consecutively and a second frequency is effective only if it arrives during the period determined by a delayed action device operated in response to the first frequency. The delayed action device may be mechanical or electrical. As shown, a resonance relay represented by contacts 8 responds' to the first frequency to remove a shunt on a thermal device 9 which opens contacts 12 relatively quickly and, on cooling, permits them to close after a predetermined time. Contacts 12 remove a shunt on operating coils 3, 4 of a thermally-operated main switch which it is desired, to open or close. A second frequency operates one of a pair of further resonance relays (contacts 6 or 7) depending on the frequency, thereby removing a shunt on the closing or opening coil 3, 4 of the main switch. The resonance relays may comprise a single operating coil and several vibrating elements as described in Specifications 517,971, [Group XXXVII], and 522,419. The contacts of the resonance relays may be normally open series contacts instead of normally closed shunt contacts.
Patent GB-538618-A (GB)
Abstract: 538,618. Atmospheric gas burners. BINKS, H., BROWN, C., and AMAL, Ltd. Feb. 7, 1940, No. 2368. [Class 75 (i)] A heating burner comprises a combustion head 4 supported by a number of mixing tubes 2a, 2b on a common base 3, gas being supplied through the mixing tube 2a to the central compartment 15 of the head 4 by a jet 5 on the base provided with a nipple regulator and pressure regulator of the kind described in Specification 451,955 and gas being supplied to the annular compartment 16 of the head 4 through the mixing tubes 2b by jets communicating with an annular passage 10 in the base connected to a gas pipe 13. Air is admitted to the mixing tubes through apertures 6.
Patent GB-1280753-A (GB)
Title: Associative memories
Inventor: WEINBERGER ARNOLD
IPC: G11C15/04
Filed: 1970-11-13
Abstract: 1280753 Digital stores INTERNATIONAL BUSINESS MACHINES CORP 13 Nov 1970 [24 Dec 1969] 54028/70 Heading G4C Words in a store are addressed associatively and non-associatively. The non-associative part of the address defines a general category for the words being searched by addressing a corresponding part of the store. The category may be Addition for example, the corresponding part of the store containing the table for this function. The associative part of the address is searched within the addressed part of the store without regard to the actual store location. The embodiment described comprises a number of storage arrays 12-15 each comprising an 8 x 8 matrix of transistor bi-stable circuits defining 8 Î 4 storage cells. The pair of bi-stables forming a cell can take the states 1, 0 representing a 1-bit, 0, 1 representing a 0-bit, 0, 0 or or 1. The cells in array 12 contain the first bit only of each of a number of stored words, the second bits being in array 13. Arrays 14, 15 similarly store the first and second bits of other words. Register 25 contains an address including X and Y bits which define a general category of words by addressing a particular cell in each array. Bits S, together with the word M1, M0 in a mask register 27, define an associative search in the selected general category and whether or not the corresponding bit position is to be searched.  Write mode.-S1, S0 are set to 1, 1 and M1, M0 to 00 (i.e. unmask). The X and Y bits having selected a cell in each array, one half of each such cell is selected for write-in by the output on 51, 55 of units 50, 54. Arrays 12, 13 or 14, 15 are selected by enabling line 62 or 63, first and second bits on lines 64, 65 being written in to the selected half of the cells in the respective selected arrays, e.g. 12 and 13. S1, S0 are now set to 0, 0 and the other half of each selected cell is set up by data signals on 64, 65. Read mode.-The sense amplifiers of arrays 12, 13 or 14, 15 are selected by enabling lines 68 or 69. Bits X, Y, S select the cells to be read in the selected arrays, the bit-state of the selected cell halves being passed to output lines 70. Search mode.-The X, Y bits define the category to be searched and the S bits define items to be searched associatively in the category. M is set to 00 (i.e. unmask). When S1 = 1 the addressed cells in arrays 12, 14 are searched for matching 1, 0 (1-bit) or 0, 0, (don't care), and when S1 = 0, for matching 0, 1 (0-bit) or 0, 0. Similarly SO causes a search in arrays 13, 15. Match detected in arrays 12 or 13 causes latch 73 to be set, match in arrays 14 or 15 latch 74.
Patent GB-1403727-A (GB)
Title: Parenteral fluid flow controllers
IPC: A61M5/168
Filed: 1972-06-14
Abstract: 1403727 Infusion apparatus SCI SYSTEMS INC 14 June 1972 [25 June 1971] 54067/74 Divided out of 1403725 Heading A5R The subject-matter of this Specification is identical with that of the Specification 1403725 but the claims relate to a parenteral fluid flow controller comprising a conduit including drop forming means, a valve for regulating the flow means for opening the valve, and means for automatically closing the valve when the timer between successive drops exceeds a predetermined value, means to cumulatively develop signals when the valve closes automatically, and means for using the signals to compensate for lost flow so as to maintain a substantially even flow rate averaged over a long turn.
Patent GB-1363298-A (GB)
Title: Hydraulic actuator
IPC: F15B15/18
Filed: 1971-11-22
Abstract: 1363298 Hydraulic actuators H H LOGAN 22 Nov 1971 [28 Jan 1971] 54219/71 Headings F1D and F1P An hydraulic actuator, Fig. 9, comprises a piston and cylinder 26 fed with liquid from a reservoir 20 by a gear pump 23 operated by an electric motor, there being a check valve 24 between the pump 23 and cylinder 26 which prevents flow from the latter to the former. An outlet pipe 29 leads back to reservoir 20 via a solenoid valve 30 and a metering valve 31. Remote control switch means 76, 77, 78 are used to operate the motor 34 and the solenoid 83 of valve 30, Fig. 5. If the circuit of the motor 34 is normally open then movement of a lever 76 against a micro-switch 78 closes the circuit to operate the motor 34 which in turn operates the gear pump 23 to pump fluid to the cylinder 26 through an inlet 42, Fig. 7. The piston 45 is thus raised to the required height and the lever then turned to its neutral position thus stopping the motor 34 and pump 23. Since the solenoid valve 30 is normally closed the piston, and hence its rod 47 and its load, is held in this position. The circuit for the solenoid is normally closed, so if lever 76 is moved against switch 77 to open the solenoid circuit then the solenoid will be de-energized and the valve 30 will open to permit flow to the reservoir 20 from cylinder 26. Thus the piston will descend at a rate determined by metering valve 31. If upward movement continues till the end of piston stroke a plate 61 engages the head 63 of a pin 58 to lift this against a spring 71. A spool 64 at the bottom of pin 58 engages a pivoted lever 66, Fig. 8, the other end of which is fixed to a plunger 67. Thus if piston 45 lifts pin 58 and thus the respective arm of lever 66 the other arm will be lowered. The plunger 67 holds a switch 69 thus this will be lowered to break the motor circuit and discontinue pumping. This avoids pressure build-up in the cylinder when the piston 45 reaches the end of its power stroke.
Patent GB-1438704-A (GB)
Title: Electrostatographic apparatus comprising a movable imaging
IPC: G03G15/08
Filed: 1973-11-22
Abstract: 1438704 Developing apparatus XEROX CORP 22 Nov 1973 [24 Nov 1972] 54233/73 Heading G2H To prevent escape of developer powder from an electrostatographic apparatus seals 10 are provided between the developer housing 12 and the sensitive surface 14. Each seal comprises a resilient strip 22 and cantilevered therefrom a series of overlapping vanes 26. The vanes are angled in the direction of movement of the surface 14, see Fig. 2. The vanes deflect developer particles away from the edges of the surface and thus decrease their chance of escape. The strip and vanes may be integrally formed from an elastomeric material.
Patent GB-1440334-A (GB)
Title: Spring-applied friction brake
IPC: F16D65/18
Filed: 1973-11-22
Abstract: 1440334 Full-face disc brakes; spring/ electric control SIEMENS AG 22 Nov 1973 [22 Nov 1972] 54353/73 Heading F2E A spring-applied friction brake 5, 4, 7, 6 has electromagnetic releasing apparatus comprising an armature 4 and an electromagnet 1, 2, the electromagnet including a magnetic core 1 having a pull-up winding 1<SP>1</SP>, Fig. 3, to be fed with A.C. to energize the electromagnet for brake release, and a holding winding which is inductively coupled to the pull-up winding and short-circuited by a rectifier. Preferably the two windings are incorporated at 2, Fig. 4. Preferably the invention is associated with an electric motor, Fig. 4, whose windings are shown on the left of Fig. 3. In Fig. 2 (not shown) the pull-up winding is in series with one of the motor windings, while in Fig. 1 (not shown) the pull-up winding is similarly connected and the holding winding has no power source but is simply shunted by a single rectifier. The rectifier may be cooled by direct contact with the core. The brake as a whole is cooled by a fin forming part of the brake disc 6. In Fig. 5 (not shown) which is a modification of Fig. 4, a rotary brake disc having brake linings on both faces and incorporating a fan is engaged between the axially-movable armature disc and a fixed braking surface.
Patent GB-1206483-A (GB)
Title: Eye examination device
Inventor: MARTELL RICHARD M
IPC: A61B3/08
Filed: 1967-11-30
Abstract: 1,206,483. Lamps. D. L. PRAEGER. 30 Nov., 1967, No. 54549/67. Heading F4R. [Also in Division G2] In an eye examination device, there is provided a casing 12 which supports a spring loaded rotatable arm 60 mounting at its outer end a blinking light illuminating an object 108 the arm 60 being aligned with any of slots 48, 50, 52, 54 so that the blinking light is moved into any one of the six cardinal positions of vision or into the vertical up and down positions as required. The device is fixed to the head of the ophthalmologist by a head band 14, a further blinking light being provided at 116, illuminating object 122, aligned with the optical axis of the wearer. Suitable circuitry for controlling the lighting is described.
Patent GB-1120829-A (GB)
Title: Rolling-mill roller table
IPC: B21B39/00
Filed: 1965-12-23
Abstract: 1,120,829. Rolling. BETEILIGUNGS-UND PATENTVERWALTUNGS G.m.b.H. 23 Dec., 1965 [24 Dec., 1964], No. 54670/65. Heading B3M. A roller table has cylindrical rollers 1, 2 which can be driven in one or the other direction of rotation, the rollers being mounted for pivoting about axes parallel to the conveying direction in alternate sequence along the conveying direction. The rollers are mounted in self aligning roller bearings 3, 4, the bearings 3 being adapted for raising and lowering by hydraulic lifting devices 5, the pipelines of which are interconnected, Fig. 5 (not shown), and the drives being adapted in such a manner that the rollers 1 and 2 can be driven respectively in opposite directions by motors 8 and 9. In modifications, Figs. 4 and 6 (not shown), the rollers have individual drives.
Patent GB-1416246-A (GB)
Title: Printed coils
IPC: H01F17/00
Filed: 1973-11-29
Abstract: 1416246 Printed circuits DAINIPPON PRINTING CO Ltd 29 Nov 1973 [5 Dec 1972] 55393/73 Heading H1R A printed coil is manufactured by coating a metal, e.g. copper, foil with a polyvinyl formal resin layer 6 which bonds to the metal, drying and curing the resin and forming the coil 5 by masking and etching.
Patent GB-1396517-A (GB)
Title: Tachograph
IPC: G01C23/00
Filed: 1972-11-30
Abstract: 1396517 Recording apparatus KIENZLE APPARATE GmbH 30 Nov 1972 [7 Dec 1971] 55446/72 Heading G1J A tachograph for recording the operational data of a vehicle, incorporates two discs spaced, in the tachograph lid, along a shaft driven by clockwork, recording means being mounted on a support between the discs to record data on one side of one disc, other recording means being provided in the housing to record on the same side of the second disc, thereby enabling easy correlation between the data on the two discs since it is recorded in the same sense. The support is pivoted on the lid for tilting in a plane perpendicular to that in which the recording means moves. In the embodiment shown which includes recording means 23, a further recording means 9 is supported on a translucent support 36 providing a base for one disc 22 which is automatically lifted at one edge by a leaf-spring 37 upon lifting of the lid 3. The support 36 has to be pivoted about a hinge at, or parallel to, the lid hinge, to enable removal of the other, lower, disc 8. The means 9 is actuated via connector 12a and a corresponding connector 47 in the cylindrical housing 1. In modifications, a spacing element determines the separation of the discs, which element may be removably mounted on the driving shaft 6. The means 9 may be actuated via a magnetic connector. The lid may be locked in the closed position to prevent unauthorized removal of the discs.
Patent GB-1287905-A (GB)
IPC: B63C11/36
Filed: 1969-11-13
Abstract: 1287905 Air locks COMPAGNIE FRANCAISE DES PETROLES SA 14 Feb 1969 [14 Feb 1969] 55660/69 Heading B7S To facilitate entry of personnel to a subaqueous chamber 12 from a movable submarine-vessel 11 the latter is furnished with a tubular member 1 having a hatch 13 and annular seals 8, 20 that can engage with a flat surface 15 around a hatch 14. When the vessel has been lowered to bring the seals into abutment with the surface 15 the hatch 13 is kept shut while a pump 2 reduces the pressure of water trapped in the member 1 sufficiently to cause the ambient pressure to force the vessel downwardly and bring rigid annularsupports 10, 18 into contact with said surface. Thereafter the trapped water is transferred to a reservoir 3 with the aid of a pump 4, and the weight of the vessel and the downward force of the ambient water thereon are taken up by jacks 7 mounted on a ring 6. Previously, a valve 24 is opened to render the pressure in the reservoir equal to that within the vessel so that the trapped water is transferred partly by suction. Sharp edges on the supports 10, 18 sever any concretions on the surface 15. When the vessel is to be disconnected from the chamber, the hatches are closed, the water in the reservoir is returned to the member 1 and a pressure-equalizing valve 5 is opened. The seal 8 may be inflatable through a valve 32 controlled by the ambient pressure. In a modification, Fig. 3, a seal 43 and rigid sharpedged support 41 are secured to jacks 45, and a diaphragm 50 seals an annular chamber circumjacent the seal 8, this chamber being connected to the pump 2. The valve 32 is regulated in accordance with the pressure in the annular chamber.
Patent GB-1248646-A (GB)
Title: Improvements relating to springs
IPC: C22C19/00
Filed: 1969-11-14
Abstract: 1,248,646. Alloy springs. SUWA SEIKOSHA K.K. Nov. 14, 1969 [Nov.30, 1968], No.55927/69. Heading C7A. A spring, and especially a watch main spring, is made from an alloy consisting of:- with optional additions of one or more of:- Al 0À1-4% B 0À001-0À1% Be 0À01-3% Nb 0À02-6% and Ti 0À05-5%.
Patent GB-1508579-A (GB)
Title: Structural element
IPC: E21D11/04
Filed: 1974-12-30
Abstract: 1508579 Building panels O A BECKER 30 Dec 1974 [31 Dec 1973] 55980/74 Heading E1B A load bearing building panel comprises two outer wall elements 3a and 3b defining with a peripheral edge seal 10 at least one hollow space therebetween and having flanged edge portions extending inwardly toward one another and connected together and to at least one inner wall element 9m by interconnecting means 11, a reduced pressure being produced in the wall element at least in the hollow space adjacent each outer wall element so as to tend to flex the outer walls inwardly to force the flanged edge portions apart and tension the inner wall element. The inner and outer wall elements are made up of composite or single metal plates 5, 6, 9 coated with plastics or rubber foils 7 and are preferably spaced apart by cellular honeycomb load bearing plates 8. In fanufacturing the panels the components are assembled together and the spaces shown between the wall elements and the honeycombs are maintained during evacuation either by screws which pass hermetically through all the wall elements or by applying an excess pressure to the outer wall elements. This latter method may be carried out in situ on the building panel by applying a box like element 20' to the outer face of the panel and by evacuating the space H4 as well as evacuating the space H2 between the wall element 36 and the inner cladding of the wall. The method of holding the elements spaced is also applied to panels including honeycombs and inner structural wall elements wherein the inner element in not necessarily engaged by the means interconnecting the flanged edge portions. Reference is made to prior Specifications 1218332 and 1366503, 1487342 and 1501880.
Patent GB-1113146-A (GB)
Title: Composition for making flexible urethane foams
IPC: C08G18/76
Filed: 1966-12-15
Abstract: Flexible polyurethane foams are prepared by reacting a polyether polyol with a toluenediisocyanate composition which contains 3-15 wt. per cent undistillate tar (obtainable by phosgenation of toluenediamine 2,4- and 2,6-isomers), the diisocyanate component comprising the 2,4- and 2,6- isomers in a wt. ratio of 70-75:30-25.ALSO:The invention comprises a toluenediisocyanate composition which contains 3-15 wt. per cent undistillable tar (obtainable by phosgenation of toluenediamine 2,4- and 2,6-isomers), the diisocyanate component comprising the 2,4- and 2,6-isomers in a wt. ratio of 70-75:30-25.  The composition is made by adjusting the proportions of diisocyanate isomers and/or tar content in the phosgenation product.
Patent GB-1276633-A (GB)
Title: Method of making an abrasive tool
IPC: B24D3/30
Filed: 1970-11-26
Abstract: 1276633 Epoxy resins BMI LABORATORIES 26 Nov 1970 [28 Nov 1969] 56337/70 Headings C3B and C3R [Also in Division C4] A method of producing an abrasive tool having a high tensile strength comprises (a) mixing an abrasive composition comprising abrasive particles with a multi-stage, thermosetting resin which is in the A-stage and is liquid or is in solution in a solvent and coating substantially all the individual particles with the resin, (b) heating the resin to convert it to the B-stage so forming individual particles coated with a fusible solid coating of the resin and (c) forming an abrasive tool by placing the resin-coated particles in a mould and applying sufficient heat and pressure to cure the resin to the C-stage and form a coherent moulded mass. In step (c) the resin-coated particles may be mixed with lightweight, easily crushable, friable particles uniformly dispersed throughout the abrasive particles and present in amount 5- 35% by volume to a total volume of the abrasive tool. Suitable thermosetting resins are phenolics, epoxides, alkyds, polyesters, urea-formaldehydes, melamine-aldehydes and polyurethanes.