baber/WOPTO huggingface dataset:
Patent GB-998058-A (GB)
Title: Electronic current regulator
IPC: G05F1/46
Filed: 1963-12-31
Abstract: 998,058. Automatic control of current and voltage. FAIRBANKS, MORSE Inc. Dec.31, 1963 [April 17,1963], No. 51392/63. Heading G3R. An arrangement for maintaining the armature current of a generator at a maximum safe value includes a control circuit which exhibits both positive and negative resistance characteristics and which is switched between first and second conductive states in dependence upon armature current variations, whereby the field energization of the generator is correctively varied. As shown, under normal operating conditions the output voltage of a generator having an armature 11 and a field winding 12 is automatically controlled in known manner by a convential voltage regulator 13 which includes a Zener diode 33 controlling a transistor 32 in the field circuit. The base of transistor 32 is connected over a diode 29 to a further transistor 22 which is rendered non-conductive when the armature current exceeds a predetermined value; the diode 29 is then forwardbiased and allows current to flow from the base of transistor 32 through resistor 27, thus freeing transistor 32 from the control of Zener diode 33 and causing a current control unit 38 to remove current from the field winding 12. When the armature current returns to the pre-determined level, transistor 22 is again caused to conduct, current ceases to flow through diode 29, and transistor 32 is again brought under the control of the Zener diode 33. The transistor 22 is part of a circuit 23 which also includes a resistor 14 carrying the armature current, a diode 16 and a resistor 17, on inductor 31 and a diode 30, and a diode 20, e.g. a tunnel diode, which exhibits a region of negative resistance at the low forward voltage range of its current-voltage characteristic. The way in which this characteristic is utilized to effect the required switching of circuit 23 when the armature current departs from a predetermined value is described in the Specification with reference to Fig. 2 (not shown). The arrangement may be modified to permit varying the value of armature current to be maintained (Fig. 4, not shown).
Patent GB-1376595-A (GB)
Title: Methods of testing electric circuit arrangements
IPC: G01R31/28
Filed: 1970-10-29
Abstract: 1376595 Testing printed circuit boards GENERAL ELECTRIC CO Ltd 3 Jan 1972 [29 Oct 1970] 51568/70 Heading G1U A method of testing a printed circuit board carrying one or more semi-conductor junctions is characterized in that the fixed potentials applied to the board, and those that are subsequently applied to effect the tests, are less than the barrier potentials of the semi-conductor junctions on the board. As described, fixed voltages of e.g. 100mV and OV are applied to appropriate lines 10, 11 of a circuit under test such as that shown, and then test voltages of a similar magnitude are applied sequentially to points A,B,C, automatically under programme control and the resulting voltages at other points 1, 2, 3 .... in the circuit are measured and compared with programmed pre-set tolerances, any deviations causing a print-out to be made.
Patent GB-1219863-A (GB)
Title: Improvements relating to photographic cameras
IPC: G03B17/52
Filed: 1968-10-31
Abstract: 1,219,863. Carriers for self-developing cameras. INTERNATIONAL POLAROID CORP. Oct.31, 1968 [Nov.6, 1967], No.51742/68. Heading G2A. A self-developing camera having a film chamber and spreading apparatus providing a narrow gap between a pair of spreading surfaces for spreading a processing liquid between negative and positive film sheets as the sheets move through the narrow gap and out of the film chamber through a film exit opening 20 in one end of the camera body has handengageable means 10 for holding the camera body whilst allowing the body freedom of movement in a plane containing the direction of movement of the film sheets and rotational freedom of movement about the said direction when the sheets are pulled manually through the exit opening. A strap 26 having a puller member 24 is looped around a metal loop 34, the loop pivoting in a stud (28) Fig.lA (not shown) which is freely rotatably mounted in an opening (32) provided in the camera body at an end of the body opposite the end containing the film exit opening. The centre of gravity of the camera preferably lies along the line 40 extending from the centre line of the film sheets to the point of attachment of the strap to the camera.
Patent GB-1286516-A (GB)
Title: Method of strengthening glass and increasing the scratch resistance of the surface thereof
IPC: C03C17/42
Filed: 1969-10-22
Abstract: 1286516 Coating glass BROCKWAY GLASS CO Inc 22 Oct 1969 [10 Dec 1968] 51790/69 Heading B2E [Also in Division C1] A glass body is strengthened by treating the surface of the glass with a pyrolyzable compound of Sn, Ti or Zr at an elevated temperature so as to form the corresponding metal oxide on the glass surface, spraying the said surface with an aqueous solution of potassium at an elevated temperature so as to form a film of the salt on the glass surface, and maintaining the glass at an elevated temperature while sodium ions in the glass are replaced by potassium ions so as to form a compressively stressed surface layer, cooling the glass and washing off excess salt, and coating the glass with an olefin polymer. The pyrolyzable compound may be applied by spraying or by exposing the glass to the vapour of the compound, and may be stannic chloride, an alkyl titanate, e.g. tetrabutyl titanate, tetraisopropyl titanate, tetrakis (2-ethylhexyl)titanate, or a titanium tetrahalide, e.g. titanium tetrachloride, as well as the corresponding zirconium compounds. The potassium salt may be tripotassium phosphate, dipotassium hydrogen phosphate or potassium carbonate. The olefin polymer may be a polymer of a lower alkene, e.g. ethylene, propylene, butylene. These may be applied as solutions or emulsions. A suitable emulsion is, in parts by weight:- Polyethylene 40 Oleic acid 11 Potassium hydroxide 2 Water 407 this being sprayed onto the glass surface.
Patent GB-1287632-A (GB)
Title: An amphibious vehicle having a road section for use in pontoon bridges
Inventor: BEHRMANN GEORG
IPC: E01D15/22
Filed: 1969-10-22
Abstract: 1287632 Amphibious vehicles; pontoon rafts K H SCHMIDT 22 Oct 1969 [22 Oct 1968] 51844/69 Heading B7A [Also in Division E1] An amphibious vehicle 1 is provided with a rotatable road section 10 and widening parts 17 which are at least half as wide as the road section are pivotally connected to the longitudinal edges of the road section so that with the road section extending in the longitudinal direction of the vehicle the widening parts hang down along the sides of the vehicle. The upper longitudinal edges 19 of the vehicle are rounded so that upon pivotal movement of the road section to a position in which it extends transverse to the longitudinal direction of the vehicle the widening parts are swung upwards to a horizontal position by the sliding of their lower surfaces over the rounded upper edges of the vehicle. The road section and widening parts can be pivoted and moved to various operating positions to form powered rafts and complete floating bridges.
Patent GB-1451970-A (GB)
Title: Snap action electric contact mechanism
IPC: G06F3/02
Filed: 1973-11-08
Abstract: 1451970 Retractive switches BECTON DICKINSON ELECTRONICS CO 8 Nov 1973 [13 Noy 1972] 51895/73 Heading H1N A multiple snap-action electric switch component for affording a plurality of independently operable switches comprises a number of cantilever blades 52, one for each switch all forming part of a single sheet 50 of resilient conductive material, each blade comprising a bowed strut portion in compression and a tie portion in tension connected together at their ends and extending between a free end of the blade forming or carrying a moving contact and an anchored end connected to the remainder of the sheet, for co-operation with respective operating members for moving the associated blade, independently of other blades, to snap the moving contact to and from a fixed contact by causing the strut to snap from curvature in one direction to curvature in the opposite direction. The blades 52 are formed by punching generally U-shaped slots in the sheet 50 which is of phosphor bronze, beryllium copper or stainless steel, for example. A keyboard switch assembly is formed by mounting the resilient sheet switch plate 26, Fig. 2, to overlie a printed-circuit board 30 with a spacer plate 28 therebetween and an insulating sealer membrane 24 between plate 26 and a frame member 22 which locates operating push-buttons such as 12A, 12B, 12C and 12D. Each button projects up through an opening in the frame 22 and has a fulcrum extension at one end engaging in an undercut recess in the frame member and has an actuating under surface engaging its associated snap blade via the sealer membrane 24. The snap blade provides both an audible and a tactile signal upon depression and on release of the button.
Patent GB-1292620-A (GB)
Title: Disazo compounds and processes for their manufacture and use
IPC: C09B62/01
Filed: 1969-10-23
Abstract: 1292620 Disazo dyestuffs CIBA GEIGY AG 23 Oct 1969 [4 Nov 1968] 51996/69 Heading C4P Disazo dyestuffs of the formula (wherein one Y is H and the other is SO 3 H; R 1  and R 2  each represents an aromatic residue containing at least one sulphonic acid group; and one X represents a fibre-reactive alkoxy-halogeno-triazine group wherein an aliphatic, cycloaliphatic or aromatic radical containing an oxygen or sulphur atom is bonded to the alkoxy radical bound to the aromatic residue via -NH- and the other represents H or a fibrereactive acyl residue bound to the aromatic residue via -NH-) are prepared by (1) coupling diazo compounds of amines X-R 1 -NH 2  and X-R 1 -NH 2  with 1-amino-8-hydroxynaphthalene - 3,6 or 4,6 - disulphonic acid, preferably first in an acid medium to insert -N=N-R 2 -X and then in an alkaline medium to insert -N=N-R 1 -X; or (2) by condensation of a compound of the formula (wherein R<SP>1</SP> 1  and R<SP>1</SP> 2  each represents a sulphonated aromatic residue one of which contains an acylatable amino group and the other of which may contain such a group) with an appropriate alkoxy-dihalogenotriazine and if necessary with a further acylating agent containing a fibrereactive residue. The starting materials for this second method are prepared by conventional methods. The dyestuffs are used for dyeing a wide variety of fibrous materials in shades of blue or greenish blue.
Patent GB-1337264-A (GB)
Title: Video information recording and reproduction
IPC: H04N9/79
Filed: 1970-11-02
Abstract: 1337264 Colour television MITSUBISHI ELECTRIC CORP 2 Nov 1970 [31 Oct 1969(2)] 52026/70 Heading H4F A film has recorded on it colour television signals, the left side of the film having recorded on it the luminance signal and red colour difference signal for alternate lines and the right side of the film having recorded on it the luminance signal and blue colour difference signal for the other lines, there being provided horizontal synchronizing marks down the centre and one side of the film, and vertical synchronizing marks between frames on the film. To play the film back a flying spot generated by a cathode ray tube 17, Fig. 4, is used, the film 1 being run continuously. The cathode ray tube 17 is controlled by saw-tooth waveforms from horizontal scanner 38 fed from a pulse generator 37. The transmitted light is picked up by a photo-electric-transducer 19 which feeds a low-pass filter 21 to remove the luminance signal, a band pass filter 30 to pass the chrominance signals and a synchronizing pulse separator 25, which removes the synchronizing pulses and passes them via a pulse former 26 to a mixer circuit 22 to be combined with the luminance signal and also via a delay line 27 to an AND circuit 28 which also has an input from the pulse generator 37. The AND circuit 28 operates a switching signal generator 29, e.g. a monostable multivibrator, which controls switches 31, 33, the latter being fed from band-pass filter 30 through a one-line delay line 32. The switches 31, 33 are switched so that the red colour difference signal is always fed to demodulator 34 and the blue colour difference signal is always fed to demodulator 35. The red and blue colour difference signals are then supplied to a matrix 24 which produces the green colour difference signal, the luminance signal being supplied via a delay line 23 to the matrix 24, the output signals from which drive a monitor 36. Instead of colour difference signals I and Q signals or X and Z signals may be recorded on the film 1.
Patent GB-1531280-A (GB)
Title: Metal halide lamps
IPC: H01J61/34
Filed: 1975-12-19
Abstract: 1531280 Metal vapour lamps GENERAL ELECTRIC CO 19 Dec 1975 [13 Jan 1975] 52130/75 Heading H1D In a high pressure metal halide discharge lamp, Fig. 2, in which the inner arc tube 3, having electrodes 5, 6 sealed in opposite ends thereof, is supported by a divided mount 11, 12 from opposite ends of a bulbous outer envelope, and with a lead wire 19 extending from one of the lead-in wires 17 to the electrode 5 at the other end of the outer envelope, there is provided a collector wire 20 which extends alongside and close to the lead wire 19 but which is connected to a different potential to that of the lead wire 19 so that it can collect photoelectrons from the lead wire that otherwise would drift to the arc tube and promote sodium loss therefrom. As shown in the lamp for base-down operation, the collector wire 20 is connected to the other lead-in wire 16, so that the wires 19, 20 are at opposite A.C. potentials, and in this case collector wire 20 provides the connection to the auxiliary starting electrode 7 with the starting resistor 21 being disposed adjacent the starting electrode 7. Alternatively in lamps for base-up operation, Figs. 5 and 6 (not shown), the collector wire 20 is connected to a dummy pin at the lower end of the lamp remote from the lamp base, and a diode rectifier arrangement may be connected between the collector wire and one of the lead-in wires so that the collector wire 20 is always maintained at a positive potential with respect to the lead wire 19. The filling of the arc tube may comprise mercury, an inert rare gas, e.g. argon, at 25 torr, for starting, sodium iodide and either thallium iodide and indium iodide or scandium iodide and thorium iodide.
Patent GB-1516870-A (GB)
Title: Apparatus for use in measuring the volume flow of a medium flowing along a flowpath
IPC: A61B8/06
Filed: 1975-12-19
Abstract: 1516870 Measuring volume flow SIEMENS A G 19 Dec 1975 [23 Dec 1974] 52205/75 Heading G1G For use in measuring the volume flow of a medium flowing along a flow-path, e.g. blood in an artery, two signals are produced respectively indicating the powers of two Doppler signals, one of these Doppler signals being received from the whole of an irradiated volume of the interior of a length of the flow-path and the other Doppler signal being received from an irradiated portion of said volume. The volume flow Q can then be determined according to the following equation:- where P m  and Pp are the powers of the Doppler signals from the whole volume and portion respectively, V p  is the volume of the portion, b is the length of the flow-path, and # is the flow-rate of the medium. As shown in Fig. 1, an ultrasonic transducer I consists of two thin Piezo-electric crystal wafers 3, 4. In operation, the blood vessel 7 is first located by closing switch 13 to energize generator 3, connecting switch 17 to line 19, and moving the transducer 1 over the skin until the Doppler signals indicated by an indicator 34 have a maximum intensity. The ultrasonic beam 6 then penetrates exactly through the centre of the vessel 7. Switch 17 is then returned to the position shown so that the Doppler signals from generator 3 are applied to a gate 18 which receives at its other input a pulse signal from a monostable device 22 which is triggered by the output pulse of a monostable device 23. The durations of the pulses from the devices 22, 23 are then adjusted so that the gate 18 passes Doppler signals received only from the volume portion V p . The switch 26 is then moved to connect the output of the Doppler unit 20, 21, (demodulator 20, power meter 21), to a storage element 27 which stores the power of the Doppler signals from the volume portion Vp. Next, the switch 14 is also closed so that both generators 3, 4 are energized, the switch 17 is connected to line 19 so that the Doppler signals from the whole of the volume are applied to the Doppler unit 20, 21, and the switch 26 connects the output of the Doppler unit to a dividing element 28 which then provides an output signal indicative of the ratio of the powers of the Doppler signals to a multiplier 29 which applies a signal representing V p /b . Pm/P p  to a further multiplier 32. If the beams make an angle α with the vessel 7, a signal # sin α is applied to multiplier 32 whose output represents the volume flow and is applied to an indicator 33. For measurement of volume flow in a curved blood vessel, the ultrasonic beams are injected in the longitudinal direction of the arch as shown in Fig. 2. In this case the gate 18 must be used for both the total volume measurement and the portion measurement and its opening time is preferably the same for both measurements. The volume flow is then determined according to the equation, where Fp is the cross-sectional area of the volume portion V p .
Patent GB-1452750-A (GB)
IPC: F02D11/04
Filed: 1973-11-09
Abstract: 1452750 I.C. engine throttle control J R HOLLINS 9 Nov 1973 52235/73 Heading F1B [Also in Division F2] Running of a spark ignition I.C. engine is prevented after the ignition has been switched off and the engine speed is controlled if the accelerator  linkage sticks by a system comprising a carburetter throttle arm 20 having an engine off and an engine idle position, first and second biasing means 28, 72, the second being stronger than the first, to bias the speed control means towards the off and idle positions respectively. A carburettor throttle linkage including a third biasing means 42 stronger than the first biasing means 28 provides control of the carburetter throttle arm 20, which can also be actuated to the off position by operator actuable means 44, 48, 56 against the second biasing means 72 and if the accelerator linkage sticks so that the engine runs at above idle speed, against the third biasing means 42. Releasing the operator actuable means allows the third biasing means 42 to move the carburetter throttle arm against the first biasing means 28 to return it to the stuck position. The second biasing means 72 is adjustable by means of a shaft 68 and nut 70.
Patent GB-1520390-A (GB)
Title: Pipe connections
IPC: F16L23/16
Filed: 1976-12-15
Abstract: The pipe connection for unprepared pipe ends consists of a sealing sleeve (3) whose internal diameter is equal to the external diameter of the pipes (1 and 2) which are to be connected to one another. In each case one flanged ring (12, 13) is pushed onto the conical external surface parts (5 and 6) of the sealing sleeve (3). The flanged rings are of conical construction on their internal surface (14, 15). The flange parts (23 and 24) of the flanged rings (12 and 13) have holes (25 and 26) which are aligned with one another and through which screws (30) are passed. By tightening the flanged rings (12, 13) against one another, a mainly radial force is exerted on the sealing sleeve (3) against the external circumferences of the pipe ends (1 and 2). The material of the sealing sleeve (3) at the same time starts to flow against the pipes (1 and 2), and, as the pressure is increased still further during further tensioning of the flanged rings (12 and 13) with respect to one another, it is finally completely solidified. Once this solidified state of the material of the sealing sleeve (3) has been reached, the connection itself remains as a fixed pipe connection if the flanged rings (12 and 13) are removed again. <IMAGE>
Patent GB-1535199-A (GB)
Title: Method of cultivating micro-organisms in plastics containers
IPC: C12M1/00
Filed: 1975-12-24
Abstract: 1535199 Aerobic fermentations using plastics cushions &c. SPOFA UNITED PHARMACEUTICAL WORKS 24 Dec 1975 [29 Dec 1974] 52790/75 Heading C6F  A method of aerobically cultivating microorganisms involves the steps of providing a nutrient medium within an internally sterile container or cushion formed by sealing the ends of a tube of plastics material e.g. polyethylene and having an inlet tube extending through the tube wall, inoculating the medium with micro-organisms and supplying air to the container through the inlet tube. Holes are formed through the top wall of the container by piercing it with a sterile spike and the air admitted in the inlet tube is exhausted through the pierced holes, keeping the cushion inflated. The cultivation may be performed with the container on a support plate in the form of a horizontal platform provided with temperature control means.
Patent GB-1157698-A (GB)
Title: Catalytic Process for the Production of Saturated Aliphatic Alcohols
IPC: B01J23/72
Filed: 1966-11-25
Abstract: 1,157,698. Hydrogenation of aldehydes. CHEMISCHE WERKE HœLS A.G. 25 Nov., 1966 [26 Nov., 1965], No. 52873/66. Heading C2C. Preparation of saturated aliphatic alcohols by catalytic hydrogenation of saturated or unsaturated aldehydes in the vapour phase using a copper-nickel catalyst which contains 97-75% by weight of a silica gel carrier and 3-25% by weight of copper and nickel as activating metals, the proportion of nickel being accordingly 40-20% by weight based on the sum of the activating metals. The catalysts are prepared in conventional manner and may contain known modifying agents for copper catalysts such as chromium or magnesium or specified compounds thereof. n-Butanol and 2-ethylhexanol mixed with small amounts of the corresponding saturated aldehydes are prepared from crotonaldehyde and 2-ethylhexenal using catalysts containing 9% Cu, 3% Ni and 0À4% Cr on silica gel. In comparative examples catalysts containing 3% Cu, 9% Ni and 0À4% Cr on silica gel ; 4% Cu, 4% Ni and 0À2% Cr on pumice; 9% Cu, 3% Ni and 0À4% Cr on pumice are shown to give significant amounts of saturated aldehydes and unsaturated compounds as by-products. A similar observation is made in a two stage method wherein the aldehyde starting material is passed first over a catalyst containing 20% Cu and 1% Cr and then over a catalyst containing 9% Cu, 3% Ni and 0À4% Cr on silica gel.
Patent GB-1191048-A (GB)
Title: Austenitic Heat Resisting Steel
IPC: C22C38/54
Filed: 1968-11-08
Abstract: 1,191,048. Steel. NIPPON KOKAN K.K. Nov.8, 1968 [Nov. 10, 1967], No.52931/68. Heading C7A. An austenitic heat-resisting steel comprises:- the balance, apart from impurities, being iron.