baber/WOPTO huggingface dataset:
Patent GB-1199488-A (GB)
Title: Dental Prosthesis.
Inventor: FEROUMONT GEORGES LUCIEN ELI R
IPC: A61C13/24
Filed: 1967-10-25
Abstract: 1,199,488. Artificial teeth. G. L. E. R. FEROUMONT and D. I. GREGOROVIC. 25 Oct., 1967, No. 48392/67. Heading A5R. A denture has a suction recess longitudinally of the gum receiving portion, the recess being narrower in the region of the canine and incisor teeth than opposite the molars, and a one-way valve located between the recess and the exterior of the denture for permitting evacuation of the suction recess as the wearer sucks or inhales the valve comprising an outer rigid ring 1, a removable temporary upper cover 2 and a lower cover 3, a valve seat 11 for a valve plate 12 faced with a seal 10 of gold leaf or the material known by the Trade Mark 'Teflon' a stopper 15 secured to the valve plate 12 for preventing ingress of food particles into the valve and a spring 14 of gold, platinium or stainless steel which urges the valve plate and the stopper together into closed position. In making the denture, the valve is embedded in a wax model of the denture with the temporary cover 2 exposed, the wax model is cast in plaster and melted out leaving the valve attached to the plaster mould so formed, a plate (16, 17 Figure. 5) in the shape of the suction recess is positioned in the mould and the mould is filled with the material of the finished denture. After the material has set, the mould is removed and the temporary cover 2 is detached. The lower valve cover 3 is centrally perforated by drilling or milling from the suction recess to provide communication between the valve and the suction recess.
Patent GB-1203981-A (GB)
Title: Template copying apparatus
Inventor: HEMERY CHARLES
IPC: B23Q35/123
Filed: 1967-10-25
Abstract: 1,203,981. Template followers. DES ANCIENS ETABS CHARLES BERTHIEZ S.A. Oct.25,1967 [Oct.28, 1966], No.48499/67. Heading G3N [Also in Divisions B3 and G1] A template copying apparatus comprises a follower mounted in a tracer head, which produces a variable signal, representing the amplitude of deviation in any one of a plurality of directions, which is compared with a series of reference values, of which one is selected, corresponding to the particular value of the variable signal, to produce a predetermined movement of the tracer head. A fixed template is engaged by a follower of a copy head secured to a machine part which bears a tool and is moved by crossed slides, each of which driven from a gear-box through a reversing mechanism comprising two electromagnetic clutches, one for each direction. As shown, Fig.1, the copy head 10 comprises a feeler 14, adapted to engage a template, which when deflected causes an axial movement of a rod 18, carrying a magnetic core 20, with respect to a sensor 21 having differential windings 22, 23. It is stated that the machine part can be positioned by electric or hydraulic reversible motors and that the sensor can comprise a continuously variable potentiometric device. In an electric control system Fig. 2, the winding 22 is energized through a transistor convertor 25 from a stabilized D. C. supply 28, 29 from a generator 32. The winding 23 is connected to a diode detector 30 having an output to an amplifier 34 which is proportional to the deviation of the core 20 from a datum position. The output of the amplifier 34 is fed to a logic switching system; comprising bi-stable circuits A1 to A5 whereby the amplified deviation signal is compared with set voltages values from outputs 1-7 of a potential divider 35. The circuits A1-A4 by connecting a supply S to lines r1 to r4 energizes relays selectively actuating travel electromagnetic clutches, not shown, for the cross-slides of the machine part whereby the tool is moved in correspondance with the shape of the template. The circuit A5, in response to a maximum follower deviation corresponding to output 7, de-energizes the travel clutches by a relay actuated through line r5. The switches shown are stated to be transistors. The maximum deviation can be alternatively sensed by a contact co-operating with the rod 18. A datum position of the core 20 is effected by a micrometer screw and the voltage from the detector 30 adjusted by a potentiometer 50. The sensitivity of the system is varied by altering the gain of the amplifier 34 through a potentiometer 51, or by adjusting the voltage applied to the potential divider 35.
Patent GB-1075308-A (GB)
Title: Resiliently biased tilt mechanism for furniture
Inventor: BAERMANN WALTER PETER
IPC: A47C3/026
Filed: 1965-11-16
Abstract: 1,075,308. Tiltable revolving chairs. AMERICAN METAL PRODUCTS CO. Nov. 16, 1965, No. 48554/65. Heading A4J. In a chair, in which the seat 10 is tiltable about a pivot pin 13 to lift actuator rod 18 and compress return spring 25, the static tension in rod 18 is variable by screwing sleeve 21 into and out of tilt head 11. On rotating seat 10 about a vertical axis, and allowing sleeve 37 to follow this motion, screw-threaded post 31 and all parts above the base of anti-friction washer 38 are turned in unison. On preventing sleeve 37 from following this movement and on depressing button 42, so that its end 44 enters groove 35 in post 31, head 11 is screwed relatively to sleeve 21 to vary the loading of spring 25 and the tension in rod 18. On rotating sleeve 37 alone, attached nut 36 revolves about stationary post 31 which thus alters the height of the seat. A catch 45 allows the adjustable top part of the seat to be removed from the base. In other forms, a foam or solid rubber block or an elastomeric sleeve replaces spring 25 and the height adjustment may be omitted. Reference has been directed by the Comptroller to Specification 994,246.
Patent GB-1270876-A (GB)
Title: Electrolytic machining process and apparatus
IPC: B23H3/02
Filed: 1969-10-02
Abstract: 1,270,876. Electrolytic machining. MITSUBISHI DENKI K.K. Oct. 2, 1969 [Oct. 2, 1968], No.48581/69. Heading C7B. [Also in Division G3] An electrolytic machining process comprises the steps of disposing a workpiece and a working electrode with a working gap therebetween, supplying a liquid electrolyte to the working gap, effecting relative approach movement between the workpiece and the working electrode at a constant speed, applying a working voltage across the workpiece and the electrode thereby electrolytically to remove material from the workpiece, producing a signal proportional to the product of the working voltage multiplied by the reciprocal of the specific resistance of the electrolyte, and controlling the working voltage so as to maintain the signal at a constant value thereby to maintain constant the ratio of the working voltage to the specific resistance of the electrolyte during the electrolytic machining operation. Thereby the working gap and also the clearance between the working electrode and the side of a hole being machined can be kept constant. As shown, a working electrode 16 machines a workpiece 12. The electrode 16 is moved at a constant speed by a motor 68. The electrolyzing power is provided from a three-phase A. C, source 34 via a saturable three-phase reactor 38, transformer 36 and full wave rectifier 52. A signal V', representing working voltage, and a signal #', representing conductivity, are fed to a circuit 350 for multiplying V' by #' and the resultant signal S is compared at a comparison point 100 with a reference signal S o . Any difference between these signals causes control of current through reactor winding 50 thereby controlling the working voltage for the electrolytic machining. In circuit 350, conductivity signal #' is fed to a potentiometer 376 where the position of the wiper is controlled by a servomotor 362 which itself is controlled by a difference signal derived from signal V' and a signal e derived from a potentiometer 354. Specified electrolyzing conditions are:- an aqueous sodium chloride electrolyte, a working gap of 0À1 to 0À05 mm, a voltage of 5 to 20 volts, a current of 3,000 to 5, 000 amps and movement of the working electrode towards the workpiece at lmm/min.
Patent GB-1205880-A (GB)
Title: Information transfer and generating apparatus
IPC: G06F9/48
Filed: 1968-10-15
Abstract: 1,205,880. Data transfer system; memory addressing system. R.C.A. CORPORATION. 15 Oct., 1968 [1 Nov., 1967], No. 48749/68. Headings G4A and G4C. Data transfer system includes a plurality of flip-flops 20-25 and a plurality of gates 28, 44-46 each gate being connected to one of the flip-flops and to a control signal source normally supplying a "1" signal wherein some of the gates are of a first type and the remainder of the gates are of a second type producing a logical complement of the first type such that when a "1" control signal is applied data from the flip-flops is supplied and when a "0" control signal is applied new data in the form of "0"s and "1"s is supplied by the gates. As shown, data from register 24 is normally passed by AND gates 28, 44, 45 and by NAND gate 46, the "1" output of the appropriate flip-flop of the register being applied to the AND gates and the "0" output being applied to the NAND gate. The outputs of the gates then correspond to the "1" outputs of the flip-flops when a "1" control signal is applied. The output of the flip-flops is applied to a Memory Address register MA12 to control read-out from memory 10 which can be a read only memory. Data from the memory can be used to address a new location by being supplied to register 24 via OR gates 22. Normally stages 24<SP>1</SP> of the register are used to address the memory. In the event of an interrupt request to Interrupt Logic Unit 60 pulses 70, 72, 74 cause, respectively, storage of data in stages 24<SP>1</SP> of the register, inhibiting of AND gates 28 and inhibiting of AND gates 44, 45 and NOR gate 46. This causes the output of the NAND and AND gates to become 100000 which is applied to the Memory Address register 12 to cause read out of the first instruction of an Interrupt routine. Pulse 64 causes resetting of stages 24<SP>1</SP>. At the end of the Interrupt routine an End Interrupt signal stops pulse 74 and enables gates 38 to cause the previous address to be read into stages 24<SP>1</SP>. A signal 26 can then be used to increment the register to cause accessing of adjacent memory locations.
Patent GB-1525820-A (GB)
Title: Camera shutter mechanism
IPC: G03B7/00
Filed: 1976-11-23
Abstract: 1525820 Shutter mechanism SEIKO KOKI KK 23 Nov 1976 [25 Nov 1975] 48790/76 Heading G2A The parts of a camera shutter mechanism are supported between two plates, at least one of which is moulded of a synthetic resin material. The support pivots for various levers and rotary members forming part of the mechanism may be moulded integrally with the plate. In this way electrical parts may be insulated without any further provision being necessary. As shown, the upper plate 5 is the moulded plate, and Fig. 1 shows the mechanism in the charged state. It is envisaged that the mechanism forms part of a single lens reflex camera having a focal plane shutter. The member for opening the shutter screens, which is spring-urged clockwise, pivots on a pin 1b, and has a bent portion 1a. It is locked against movement by an abutment 2b of an opening detent member 2, spring-urged anticlockwise about a pivot 2a. The closing shutter screens, which are separate from the opening screens, are closed by a member spring-urged clockwise about a pivot 3b, and which has a lug 3a, locked against movement by an arm 4b on a closing detent member 4 spring-urged clockwise about a pivot 4a. A magnetic coil 11 is wound on a frame 11a integrally moulded with plate 5. A control lever 12, spring-urged clockwise about a pivot 12a has a magnetic portion 12b, and in the position shown, an arm 12e of lever 12 engages with the surface 7c of a control cam 7. Thus lever 12 is pushed anticlockwise so that the magnetic portion 12b is brought into contact with the core 11b of the magnet 11. To effect an exposure, a release lever 10 is pivoted clockwise. This disengages it from a locking lug 7g on control cam 7, which is now free to be spring-driven anti-clockwise. Surface 7c moves clear of arm 12e, so that lever 12 would move clockwise except that it is still held by the magnet 11, which is now energized. A projection 7e on cam 7 operates the starting contact of a timing mechanism as the cam rotates. When it has rotated sufficiently, a projection 7f on the cam engages and pivots member 2 clockwise. This disengages from portion 1a, allowing the opening member to open the shutter blades, and so initiate the exposure. After a predetermined time the magnet is deenergized, which releases lever 12 to pivot clockwise. The end 12f of the lever engages and pushes member 4 anti-clockwise. This releases lug 3a, which allows the closing member to close the shutter blades.
Patent GB-1532809-A (GB)
Title: Switched-mode power supply
IPC: H02M3/335
Filed: 1975-11-28
Abstract: 1532809 DC to DC converters PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 28 Nov 1975 [2 Dec 1974] 49004/75 Heading H2F A switched-mode power supply circuit for converting a D.C. input voltage (+)V B  to a substantially constant D.C. output voltage V 0  comprises a switching transistor 1 connected to the input voltage via the primary winding 2 of a transformer 4, whose opposed polarity winding 5 is connected to a load 9 through members 6, 7, a driver transformer 13 and transistor 10 controlled by a modulator 11 including a stage for comparing the voltage V 0  with a reference voltage, whereby members 10, 13 supply a periodic pulse-shaped control signal to transistor 1 to make it alternately conductive and non-conductive to maintain the voltage V 0  at the reference value, and a driver resistor 14<SP>1</SP> connected to the junction of a smoothing capacitor 19 and rectifier 18 forming, with resistor 21, a clipping circuit for the voltage transient occurring when transistor 1 switches off, the supply voltage for the driver stage being supplied thereto from the input voltage V B  through members 14<SP>1</SP>, 18. A comparison is made with a known circuit, Fig. 1 (not shown) wherein the driver stage resistor (14) is connected directly to the voltage V B  and the clipping circuit includes a resistor (20) of high power rating. The circuit of Fig. 3 enables the resistors (14, 20) to be combined into a single reistor 14<SP>1</SP> and, in addition to using the clipping circuit to generate a supply voltage for the driver stage, allows the rectifier 18 to function as a starting diode, reduces the variation in driver current (and hence base current of the transistor 1) with variation of the voltage V B  and provides at starting a gradual build-up of the voltage V 0 , since the supply voltage for the driver stage is lower during starting than during normal operation. Hence the mark-space ratio of the control signal for transistor 1 increases gradually from starting. A theoretical analysis is given for the operation of the known circuit and the circuit of Fig. 3, and the application of the latter to the combination of a power supply circuit and a line deflection circuit in a television receiver is described, Fig. 4 (not shown).
Patent GB-1365294-A (GB)
Title: Apparatus for effecting aerobic degradation by aeration
IPC: C02F3/20
Filed: 1971-10-13
Abstract: 1365294 Aerobic degradation ENGINEERING DEVELOPMENTS (BIRMINGHAM) Ltd 13 Oct 1971 [17 Oct 1970] 49397/70 Heading B1C Apparatus for aerating, e.g. slurry comprises a shaft 3, a floatation member 5 mounted on electric motor, a skirt 4 rotatable with the shaft 3, a floatation member 5 mounted on the shaft 3 and air discharge nozzles 37 round the periphery of the skirt. The skirt may have radial flutes. The apparatus is sunk into the material to be treated up to the level of an annular float 41 of the member 5, wedges 45 allowing adjustable location of the member 5 on the shaft 3. Compressed air through a flexible pipe 29 drives a vaned rotor 22 of the motor 2 to drive the shaft 3. Exaust from the motor 2 is led to the nozzles 37, to be discharged into the material through non- return valves. Eye bolts 9 facilitate lifting, lowering and movement of the apparatus and permit the motor housing to be anchored. The skirt 4 may be of plastics material, and the shaft, &c., may be of stainless steel, or mild steel coated with zinc, cadmium or plastics.
Patent GB-1368676-A (GB)
Title: Method for interconnecting the selection stages in a switching  network
IPC: H04Q1/16
Filed: 1972-10-26
Abstract: 1368676 Automatic exchange systems INTERNATIONAL STANDARD ELECTRIC CORP 26 Oct 1972 [28 Oct 1971] 49456/72 Addition to 1327576 Heading H4K [Also in Division H1] A switching network comprises a plurality of cascaded stages of co-ordinate switching matrices, wherein the matrices are wired on printed circuit boards each having its inlets and outlets arranged in separate groups along the same edge of the board, wherein the boards of each stage are at right angles to the boards of the or each adjacent stage and wherein interstage couplings are provided by one or more coupling boards extending in a single plane at right angles to all matrix circuit boards. As shown the network is mounted in a box like housing and comprises three switching stages of MOS transistor matrices mounted on boards a 1  to a 16 , b 1  to b 8  and C 1  to C 16 . As described the b stage switches are mounted on sub-boards directly mounted on the boards b 1  to b 8 . The interstage couplings are provided by wires on coupling boards Xa1 to Xa16 and Xc1 to Xc16 located in a single plane at the back of housing connected to the matrix circuit boards by electrical connectors, the inlets and outlets of the network also being in this single plane. The boards can be slidably removed from the housing.
Patent GB-1146280-A (GB)
Title: Improvements in or relating to synchrodyne receivers
IPC: H03D1/22
Filed: 1966-11-04
Abstract: 1,146,280. Piston-rings. FORD MOTOR CO. Ltd. 17 Jan., 1968 [19 Jan., 1967], No. 2483/68. Heading F2T. A piston-ring assembly 15 housed in a groove 14 in an internal combustion engine piston 13 comprises a compression ring 16 and an oil control ring 17, the ring 16 resiliently engaging the cylinder bore 12 and having a conical surface 22 that slidably engages the ring 17 to urge it both radially against the bore 12 and axially against the adjacent side of the groove 14. The rings 16 and 17 are split rings and are preferably of cast iron and chrome plated steel respectively.
Patent GB-1512862-A (GB)
Title: Method for surface treatment of electrode in distributor of internal combustion engine for suppressing noise
IPC: F02P7/02
Filed: 1975-06-18
Abstract: 1512862 Rotary ignition distributors TOYOTA JIDOSHA KOGYO KK 18 June 1975 [26 June 1974] 49993/77 Divided out of 1512861 Heading H1N The rotor or electrodes of a rotary ignition distributor are spray coated with a material which is subsequently oxidized to provide a coating with a high electrical resistance which improves the suppression of radio interference. Materials such as copper, iron/nickel alloy, aluminium, nickel or silicon are applied by plasma arc, thermospraying or detonation processes and oxidized in a hot air furnace for several hours. An intermediate layer of nickel aluminide may also be applied on the electrodes
Patent GB-1417787-A (GB)
Title: Catalyst composition for oxidation of butenes
IPC: C07C45/34
Filed: 1973-11-01
Abstract: 1417787 Methacrolein MITSUBISHI RAYON CO Ltd 1 Nov 1973 [13 Nov 1972 20 Nov 1972 (2)] 50794/73 Heading C2C [Also in Divisions B1 and C5] Methacrolein is made by vapour phase oxidation of isobutene in the presence of a catalyst comprising essentially all the elements of I as shown below, one combination of elements selected from among the combinations of II and at least one of the elements III: (I) W + Mo + Te + Sb + O (wherein the atomic ratio W/Mo falls in the range of 0À01-100, the atomic ratio Te/(W+Mo) in the range of 0À01- 0-2 and the atomic ratio Sb/(W+Mo) in the range of 0À01-1). (II) (a) Ni+Co; (b)Ni+Fe; (c)Ni+Co+Bi; (d) Ni + Fe + Bi (wherein the total of the atomic ratios of elements in the selected combination to (W+Mo) falls in the range of 0À08-2 and the ratio of each element to (W+Mo) in the range of 0À02-1). (III) K, Rb and Cs (wherein the atomic ratio of the selected metal or metals to (W + Mo) falls in the range of 0À0005-0À3).
Patent GB-1203789-A (GB)
Title: Improvements in or relating to electrophoretic lacquering baths
Inventor: JACOBY GUENTER
IPC: C25D13/22
Filed: 1967-11-09
Abstract: 1,203,789. Electro-phoretic coating apparatus. SIEMENS A. G. Nov. 9, 1967, No. 51049/67. Heading C7B. In an electro-phoretic lacquering bath comprising a conductor bar 9 on which current collectors 6 slide for supplying current to workpieces 4 as they travel through the bath, the conductor bar 9 is subdivided into individual sections along the direction of travel of the workpieces, each section having associated therewith a regulating unit, 11, 12, 13, or 14, supplied from a common voltage source 24 and provided with its own current or voltage controller, 16, 16<1> respectively. In the form shown current is supplied via transformer 19. Preferably the controller means 16, 16<1> are such that the end conductor bar sections 9 are maintained at constant voltage whilst the intermediate sections are provided with constant current, Counter-electrodes are provided by the bath wall 2 and auxilliary counter-electrodes 5 suspended within the workpieces 4. Means 17 is associated with each controller means 16, 16<1> whereby adjacent regulating units may be rendered inoperative during passage of a workpiece between the conductor sections associated therewith. The regulating units 11-14 may be formed by semicontrolled three-phase rectifyer bridge arrangements comprising thyristors 22 and rectifiers 23.
Patent GB-1265700-A (GB)
Title: Improvements in or relating to thermal storage elements
IPC: F24H7/02
Filed: 1969-10-20
Abstract: 1,265,700. Thermal storage heaters. G. BAUKNECHT G.m.b.H. ELEKTROTECHNISCHE FABRIKEN. 20 Oct., 1969 [22 Oct., 1968], No. 51323/69. Heading F4U. An electrically heated thermal storage heater comprises a core 7 of material which passes from solid to liquid phase on heating, the core being accommodated in a container having an upper expansion space 6 and being heated either by elements 10 mounted in protecting tubes embedded in the material as shown or by tubular elements mounted between adjacent containers. The heating elements extend over the full depth of the core.
Patent GB-1090826-A (GB)
Title: Method of smelting iron ore
IPC: C21B13/00
Filed: 1964-12-18
Abstract: Iron ore and flux in a size range generally less than 1/4 " are introduced into an oxy-fuel flame in the direction thereof, the molten product being collected and a reducing agent injected below its surface to produce molten slag and iron which are separately withdrawn from the reduction vessel.  In the particular embodiment illustrated in Fig. 1, the ore and flux pass firstly through a fluidized bed pre-heater 10 and then through the central tube 15a of burner 16, while oxygen and fuel gas are supplied to the outer and intermediate passages 18 and 19 respectively.  The molten ore and flux then pass to reduction chamber 25 where a carbonaceous reducing agent is injected through tuyeres 28.  The gases evolved in the reaction are partly burnt above the bath with oxygen admitted through pipes 29, to provide heat for the reduction, and are then led through pipe 21 to burner 16, the exhaust gases from which are used to heat the ore in pre-heater 10. If necessary additional fuel may be fed to the burner through pipe 20.  To minimize the attack of molten iron oxide on the refractory lining of the apparatus, water sprays are applied to the outer surfaces of the latter so that a layer oxide is solidified on the refractory.  In a modification using hydrogen as a reducing agent, the gases leaving the reducing chamber are recirculated after purification and the addition of fresh hydrogen, while the burned is fuelled independently.