baber/WOPTO huggingface dataset:
Patent GB-506480-A (GB)
Title: Improvements in or relating to electro-acoustic devices
IPC: H04R11/00
Filed: 1938-09-09
Abstract: 506,480. Receivers ; transmitters; diaphragms. STANDARD TELEPHONES & CABLES, Ltd. Sept. 9, 1938, No. 26385. Convention date, Oct. 6, 1937. [Class 40 (iv)] An electro-acoustic transmitter or receiver comprises a diaphragm having a central rigid disc of non.magnetic material attached to au outer annular section of magnetic material and the actuating means for the diaphragm comprises an annular polepiece coacting with the outer annular section at the boundary of the central disc. In the receiver shown in Fig. 2, the diaphragm has a central portion 9 of non-magnetic material, such as aluminium or aluminium alloy of a thickness of about 001 inch, and the annular magnetic portion 10 has a thickness of about 010 inch. The magnetic system is formed by outer and inner polepieces 4, 6, a ring magnet 7 and voice-coil 8. The annular member 10 is held in position by magnetic attraction and a spacing ring 11 of magnetic material is disposed between the casing 1 and a flange 5 formed on the polepiece 4. In the transmitter shown in Fig. 4, the outer polepiece 21 is disposed in a recess in the casing 22 and the inner polepiece 25 is Z-shaped. The casing is provided with a cover 26, Fig. 6, having an annular passageway 27 formed by a conical member 28 supported by members 33 and located in a frusto-conical opening in the cover.
Patent GB-1061468-A (GB)
Title: Improvements in automatic control systems
Inventor: CHANDOS ROBERT EUGENE
IPC: G05D3/14
Filed: 1964-06-25
Abstract: 1,061,468. Correspondence control systems. NORTH AMERICAN AVIATION, Inc. June 25, 1964, No.26394/64. Heading G1N. [Also in Division G3] In order to prevent instability in a control system, particularly a closed loop type system, due to a resonance mode (which may originate in the controlled element and be coupled through a feedback sensor to the system) causing a undesired peak amplitude at a given frequency, the gain of the system at that frequency is determined and is compared with a reference corresponding to the maximum gain level for stable operation, and a difference value thus obtained is used to operate a potentiometer to reduce the overall gain of the system, and may be used to operate a notch filter in a feedback loop to suppress the undesired oscillatory mode. A control system comprises an actuator 14 responsive to a system input, a controlled element 11, a feedback sensor 17, and a comparator 16 which compares the input and output responses to produce an error signal and cooperates with the actuator 14 to reduce the error. Two identical extremely narrow band pass integral filters 23, 22 (described ref. Figs.4, 5, 6 and 7, not shown) are provided, the centre frequency # o  of each being that of the undesired oscillatory mode, and are connected to the system input and to the output of the sensor 17 respectively. The output of filter 23 is divided by the output of filter 22 in a known type ratio means to provide a ratio signal indicative of the system gain at the single frequency # o . The continuous comparison of the amplitude of such ratio signal when rectified, with a reference D.C. source 26 indicates whether or not the gain is increasing so as to drive the system dynamically unstable, in which case the sense of a comparison signal output from a comparator 25 causes a D.C. motor 27 to adjust a potentiometer 21 in a direction to reduce the gain of the closed loop system below the point of instability. If the gain is too low whereby the speed of response of the system is slow the motor rotates the potentiometer in the other direction. There may be more than one pair of filters, each constructed and arranged to filter a mutually exclusive one of a plurality of discrete frequencies Fig. 8 (not shown). There may also be provided in the feedback path, between the sensor and comparator, a notch filter (or filters) adjusted automatically by a servomotor to suppress a resonant mode(s). Figs. 9, 10 (not shown). The equipment distinguishes between desired periodic output responses at a given frequency and undesired oscillatory output modes. The integral notch filter includes a series of multivibrators connected to act as a digital frequency divider in a known manner. Fig.4 (not shown).
Patent GB-1364340-A (GB)
Title: Catalyst manufacture
IPC: B01J37/02
Filed: 1972-06-06
Abstract: 1364340 Shaped multicomponent catalysts CHEVRON RESEARCH CO 6 June 1972 26417/72 Heading B1E Shaped macroparticles of multicomponent catalysts are produced by forming an unwashed mass of gelatinous precipitates containing the catalyst components or their preceursors, converting the unwashed mass into shapeable macroparticles by partially drying the unwashed mass in a manner such as to obtain impure clustered particulate material with a water content of 55-83 wt. %, shaping the particulate material into shaped macroparticles, washing the shaped macroparticles to remove substantially all the impurity salts therefrom without causing the macroparticles substantially to lose their shape, and thereafter drying and calcining the shaped macroparticles. The shapeable marcoparticles may be formed simultaneously with the partial drying by stirring or the unwashed mass may be subdivided and then partially dried to give them. The gelatinous precipitates may comprise finelly divided hydrous oxides of at least two of Mg, Al, Si, Sn, Ti, Zr, Cu, Ag, Au, V. Mo, W, Cr, Mn, Re, Fe, Co, Ni, Pt, Pd, P, As or Sb, at least one of the hydrous oxides being convertible to a porous, high surface area, oxidic carrier on calcination.
Patent GB-621809-A (GB)
Title: Improvements in push feed mechanical pencils
IPC: G21C19/303
Filed: 1946-09-03
Abstract: 621,809. Propelling pencils. SCRIPTO, Inc. Sept. 3, 1946, No. 26435. Convention date, Nov. 13, 1945. [Class 146 (iii)] A push feed mechanical pencil comprises a point-section having a lead enclosing opening, clutch means housed in and relatively reciprocal to the point-section, stop means movable to obstruct the opening at a point a fixed distance from the desired position of the lead, means to retract the the clutch and lead to a point above the stop means, the lead being then released from the clutch simultaneously with the stop means moving to obstructing position and upon reversal of the reciprocating movement, the removal of the stop means being synchronised with the clutch means grasping the lead and moving it to writing position. An outer barrel 10 houses an inner tube 16 which is secured to a cap 14 and a spring 12 lies between the cap 14 and a shoulder 13 in the barrel 10. The clutch 21 with slots 22 is biassed to expand and has recesses 21a by which it is secured to the barrel 10 by indentations 28, on a sleeve 29, which pass through slots 19 in the tube 16. The point-section 17 with slot 20 is biassed to contract and is screwed onto the end of tube 16 and moved downwards therewith against the action of the spring 12 by pressure on the cap 14. As the point section 17 is moved downwards, the lead 34 and clutch 21 remain stationary through the depth " A " of the cylindrical inner surface 24 and then the clutch expands into the enlarged space above and the jaws of the pointsection contract behind the lead which will rest on shoulders 35 inside the point-section. As the cap 14 is released, the clutch 21 grips the lead, the jaws of the point-section open and the lead is fed forward the distance " A ". The inner space of the tube 16 may be utilised as a magazine for spare leads which can slide down a conical surface 36 of the clutch 21 to give continuous lead feed. The top of the tube 16 may be closed by an eraser.
Patent GB-1392414-A (GB)
Title: Method of repressing the precipitation of calcium fluozirconate
IPC: B01J6/00
Filed: 1973-06-04
Abstract: 1392414 Calcium fluozirconate UNITED STATES ATOMIC ENERGY COMMISSION 4 June 1973 [3 July 1972] 26503/73 Heading C1A [Also in Division G6] An aqueous solution containing fluoride calcium and zirconium values, e.g. one containing radioactive zirconium wastes, is processed to a solid form by adding calcium nitrate to suppress the fluoride volatility followed by boric acid or a borate salt to prevent the formation of calcium fluozirconate gel or an amorphous precipitate of calcium fluozirconate and calcining the resulting solution to a granular solid consisting at least in part of calcium fluozirconate.
Patent GB-1190958-A (GB)
Title: Connector Duct
IPC: F28F9/02
Filed: 1967-06-08
Abstract: 1,190,958. Pipe couplings. LUMMUS CO. 8 June, 1967 [24 June, 1966], No. 26542/67. Heading F2G. [Also in Division F4] A connector duct for use in passing fluids from the output 32 of a cracking heater to the inlet side of a tubular heat exchanger, comprises a tubular first portion 34, 36 of circular crosssection, a curved second portion 38 flaring outwardly from the first portion in a smooth curve, a frusto-conical third portion 40 extending outwardly from the second portion, and a ring- shaped fourth portion 42 extending from the periphery of the third portion, the distance (h) from the point of intersection of the second and third portions to the outlet end of the fourth portion being about 0.03 to 0.2 times the minimum diameter of the first portion and the distance from the periphery of the third portion to the outlet end of the fourth portion being about 0.25 to 0.5 times (h). The connector duct is incorporated in an inlet device 10, said device having within a shell 26, thermal insulation 28 surrounding the duct.
Patent GB-687277-A (GB)
Title: Improvements in mineral coated paper and process of coating paper
IPC: D21H19/64
Filed: 1947-05-13
Abstract: 687,277. Mineral coated paper. CONSOLIDATED WATER POWER & PAPER CO. May 13, 1947. No. 26581/49. Addition to 687,262. Class 96. The invention of the parent Specification is modified in that the thixotropic coating composition has a solids content of 50 to 62 per cent. and an enzyme-modified starch content of 60 to 300 parts based on 970 of mineral pigment. It may be applied at a web speed of 800 to 1,000 ft. per min.
Patent GB-376554-A (GB)
Title: Improvements in or relating to registering devices for sheet feeding apparatus for printing machines
IPC: B65H9/10
Filed: 1931-09-23
Abstract: 376,554. Feeding sheets. MASCHINENFABRIK AUGSBURG-NœRNBERG AKT.- GES., 7, Stadtbachstrasse, Augsburg, Germany. Sept. 23, 1931, No. 26593. Convention date, Sept. 29, 1930. [Class 100 (i).] Sheet - registering devices.- Sheets are registered while travelling over a feed table 1 bv means of one or more discs 3 which are let into the table 1 and formed with surfaces which are flush with the table. The sheets are pressed against the discs by means of oscillating feelers or fingers 6 formed at their ends with rollers 7, and the discs move the sheets in a diagonal direction indicated by the arrow 8, to register the sheets against front stops 10, and side stops 9. The rates of the speed of rotation of the discs relatively to the forward velocity of the sheets can be varied, and in order to register sheets printed on one side while being moved to receive a perfected impression, the direction of rotation of the discs can be varied so as to use the same edges for registration in each case. Two discs rotating in opposite directions may be used when two half sheets are being advanced simultaneously.
Patent GB-693424-A (GB)
Title: Improvements in and relating to electronic digital computing apparatus
Inventor: WILLIAMS FREDERIC CALLAND
IPC: G06F7/50
Filed: 1948-10-13
Abstract: 693,424. Calculating-apparatus. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 4, 1949 [Oct. 13, 1948], No. 26640/48. Class 106 (i). In electronic digital computing apparatus comprising a cathode-ray tube 11 having an information storage screen, e.g. as described in Specifications 645,691, 657,591 and 682,156, the irradiation of the screen is controlled by a regeneration circuit including a computing circuit 29 receiving signals picked up from the screen and from an external source 30 and supplying output signals in accordance with a mathematical process performed on the received signals. The tube 11, Fig. 1, may be used to store binary numbers (one per screen line) in the form of " dots " and " dashes " as described in Specification 657,591. The apparatus shown is generally similar to that disclosed in Specification 682,156, and includes a pick-up electrode which receives a negative or positive pulse according to whether a " dot " or " dash " is being scanned on the screen, the pulse being fed by an amplifier 27 to a gate 25 which is opened for a duration corresponding to the " length " of a " dot " by a strobe pulse generator 28. According to the sign of the pulse, if the computing circuit 29 were not present, a pulse of " dot " or " dash " length would be fed to the control grid 13 of the tube 11 so that the original charge pattern on the screen would be regenerated. Instead, according to the present invention, the pulses fed to the control grid represent the result of a computation performed in the circuit 29 on the stored binary number and a number similarly represented digit by digit by pulses from the source 30. The circuit 29 may be as described in Specification 683,882, for adding two binary numbers by adding, in amplitude, by means of thermionic valves, pulses representing the stored binary digit A, the external binary digit B and a carry digit C D  (represented by a delayed pulse from a computing circuit store), to determine firstly whether a pulse shall be sent to the circuit store to represent a further carry digit C, and secondly whether a pulse shall be sent back to the gate 25 to represent an answer digit " 1 " (answer Z=A+B+C D  - 2C). Alternatively, a similar subtracting circuit, shown diagrammatically in Fig. 5, may be used to compute "A-B ". A pulse representing digit A and inverted pulses representing - B, - C D  are added in amplitude in valve circuit 1 and, if the result sent to discriminator 2 is - 1 or - 2, an output pulse C is produced and sent to the computing circuit store. The pulse C is also doubled and sent with pulses A, - B, - C D  to a second amplitude adding circuit 3 to produce an output pulse from discriminator 4 if Z= A - B - CD+2C= 1. Instead of being represented by " dots " and " dashes " on the cathode-ray tube screen, the binary digits may be stored by the other methods described in Specifications 645,691 and 657,591.
Patent GB-1489548-A (GB)
Title: Wrought aluminium alloys
IPC: F01N13/16
Filed: 1976-06-25
Abstract: 1489548 Wrought A1 alloy METALLGESELLSCHAFT AG 25 June 1976 [30 June 1975 8 Dec 1975] 26659/76 Heading C7A A wrought aluminium alloy containing Mn 0À8-2À2 Zr 0À1-0À5 Fe 0-1À0 Si 0-0À6 Cu 0-0À5 Mg 0-0À1 Al Bal plus impurities is produced by conventional continuous casting at a pull rate of 40-80 mm/minute, held at 450-500C for 5-10 hours and hot worked. The hot worked alloy is then cold worked at least 50% and subjected to a recrystallising anneal such that predetermined strength and durability values are obtained. The alloy is claimed to resist recrystallisation up to about 400C, and consequently is valuable for use as a base material for vitreous enamelling. The alloy may be used in exhaust systems in automotive applications, heat exchangers, ducted plates for solar collectors and saline water reclamation plants etc, and also for kitchen ware which is vitreous enammelled.
Patent GB-1208147-A (GB)
Title: Improvements in a.c. generators
IPC: H02K11/04
Filed: 1968-06-05
Abstract: 1,208,147. Automatic voltage control. NIPPON DENSO K. K. June 5, 1968 [June 6, 1967], No. 26674/68. Heading G3R. [Also in Division H2] In an A.C. generator 1, e.g. of a vehicle, having a field winding 3 fed with D.C. via slip rings 5, 5a and brushes 6, 6a carried in a brush holder 12, the latter and a semi-conductor voltage regulator 7 are mechanically connected to each other and to the generator by the same mechanical connection means e.g. screws 13...15 of which at least one also electrically connects the regulator to the brush holder. As shown, the two components are secured to a bearing plate 16 having three air flow-through apertures 23 behind which are 3pH bridge rectifiers 4 which convert the current supplied by the 3PH armature winding 2 to the vehicle battery 8 and other loads 10. The screw 15 electrically connects the two components to the plate 16 and thus to earth, whilst bushes 19, 19a insulate the screws 13, 14 from the plate. Instead if being on opposite sides both components may be on the inside of the plate 16. Reference has been directed by the comptroller to Specification 1, 027, 833.
Patent GB-227227-A (GB)
Title: A new or improved detachable hinge connection
IPC: A47G1/14
Filed: 1923-10-25
Abstract: 227,227. Bushen, J. H. Oct. 25, 1923. Hinges. - A detachable hinge connection for use with stands or supports for displaying photographs and pictures and for fire screens, blackboards, step ladders and other purposes comprises a sheet metal part A with grooves a<4> in which are slidablv mounted the ends of a wire E that forms the hinge connection of a plate B secured to the strut H, the member F being held in an adjusted position by a wire link D. This link member is hinged at a' to the plate A and at b<1> to the plate B. The member A is arranged to swivel on the frame F by a pin connection a'. In a modification, the member A has a central boss in which the ends of the wire E are arranged to slide.
Patent GB-1453536-A (GB)
Title: Breakout wrench
IPC: E21B19/16
Filed: 1974-06-17
Abstract: 1453536 Drill-pipe wrench RUSTONBUCYRUS Ltd 17 June 1974 [23 Nov 1973] 26692/74 Heading B3N A "break-out" wrench for separating two sections 3 of a drill string comprises a slide arm 7 pivotably mounted at hinge 8 on the drill support structure, mast 2, a carriage 19 slidable along the arm, an hydraulic actuator 30 fixed relatively to the arm and connected to the carriage for moving it along the arm, and a wrench arm 26 pivotally mounted on the carriage 19 and terminating in a set of wrench jaws 29 for gripping one of the sections 3. In use, the actuator 30 is retracted and jaws 29 closed on one of the sections; the other section is held by other wrench means. The actuator is extended causing anticlockwise movement of the closed jaws which unscrews the sections. The slide members 21 on the carriage, Fig. 5, may be relatively offset by virtue of strip 22 so as to cant the carriage relative to guide plate 11 on arm 7 so that looseness in the pivotal connection of the arm 26 on spindle 23 is compensated. A bar 33 fixed to the drill support structure has a removable pin 34 at its end which engages the slide arm 7 in its stowed position, Fig. 2. Arm 26 may be swung out of the way of the drill string through 180 degrees.
Patent GB-1506638-A (GB)
Title: Pressure cooker
IPC: A47J27/092
Filed: 1975-06-24
Abstract: 1506638 Pressure cooker VERZINKEREI ZUG AG 24 June 1975 [25 Oct 1974] 26733/75 Heading B1X [Also in Division F2] A pressure cooker comprises a pot, a lid which is detachable from the pot, a resiliently deformable sealing means for providing a pressure tight seal between the lid and the pot, and means for deforming the sealing means so as to break the pressure-tight seal, the lid being detachable from the pot only after the seal has been broken. Figs. 1 and 2 show a pot 1 and a lid 2 having a handle 4. The seal is a U-shaped member 3 having lips 3a, 3b. A tilting element 6 has pivoting part 8 and a cam 9 for engaging seal 3. The lid and pot have cooperating bayonet segments. When the lid is placed on the pot cam 9 engages a bayonet segment 5 of the pot which forces the cam to adopt a ventilating position. When the lid is in a closed position element 6 is pivoted into a locking position by the resilient action of seal 3. There may be a spring to augment this action. Release of pressure is by pressing part 8. In a modification part 8 is operated through a pin Figs. 3, 4 (not shown). In the embodiment shown in Figs. 5-7 tilting element 106 is pivotable about axis 107 by a cam 112. The cam is rotated by rocking lever 114.
Patent GB-1421616-A (GB)
Title: Preparation of vinyl polymers venetian blind for use in a double-glazed window
IPC: C08F14/00
Filed: 1973-06-05
Abstract: 1421616 Polymerization initiator AIR PRODUCTS & CHEMICALS Inc 5 June 1973 [19 June 1972] 26763/73 Heading C3P Unsaturated monomers, especially vinyl chloride, are polymerized in an aqueous medium in the presence of an initiator formed in situ from a water-soluble peroxide YOOH and an organic sulphonyl halide RSO 2 X producing an initiator RSO 2 OOY in which R is alkyl, alkenyl, aryl or substituted aryl, X is halogen and Y is hydrogen, alkali metal or R 2 CO- where R 2  is a C 1 -C 4  alkyl group.
Patent GB-242965-A (GB)
Title: Improvements relating to electric relay switching devices
IPC: H01H51/10
Filed: 1925-10-26
Abstract: 242,965. Metropolitan-Vickers Elec trical Co., Ltd., (Assignees of Wensley, R. J.). Nov. 15, 1924, [Convention date]. Contact - making relays.-In a lightcurrent relay of the telephone type, the contacts 30, 31 on the springs 6 and 7 are separated by the energization of the upper electromagnet, which attracts the L-shaped armature 11, turning it clockwise to raise the spring 6 by means of projections 12. At the same time an L-shaped latching lever 16 pivoted at the other end of the frame is allowed to drop forward till its upper end comes under the raised end of the armature 11, thus keeping this in its operated position. To restore the contacting position of 30, 31 the lower electromagnet is energized when its armature 23 turns and moves the latch 16 counterclockwise allowing the armature 11 to fall away under the influence of the spring 6 when its electromagnet is deenergized. De-energization of the lower electromagnet allows the armature 23 to take up its initial inoperative position.
Patent GB-1071950-A (GB)
Title: Pneumatic tube conveying system
IPC: B65G51/08
Filed: 1965-06-25
Abstract: 1,071,950. Pneumatic conveyers. INTERNATIONAL STANDARD ELECTRIC CORPORATION. June 25, 1965 [June 29, 1964], No. 27001/65. Heading B8A. A pneumatic conveying tube system comprises a drive tube 1 divided pneumatically into sections 8, 9, 10, 14, 2, an operating air tube 3 incorporating a suction-type blower 4 and communicating with the drive tube at the ends of each section via valves 11, 21, 31, 41 actuated by detectors 13, 23, 33, 43, 53 which sense the passing of a dispatch carrier along route 1. Further valves 12, 22, 32, 42 associated with the detectors open the route 1 to atmosphere. In operation, initially all the valves 11, 21, 31, 41 are open and all the valves to atmosphere closed whereby a carrier placed in the route 1 is sucked from a dispatch station until detector 13 is reached whereby valve 11 closes and valve 12 opens. Air is then sucked into the system via the open valve 12 and the carrier moves along to the next detector 23 where a similar action is effected. Upon the carrier being sensed by the downstream detector 53, all the valves to atmosphere are closed and all the valves to the air tube 3 are opened whereupon another carrier may be dispatched. An air tube 6 bridging the section 2 has its own suction-type blower 5, the effect of which is to reduce the speed of the carrier in the section 2 to a predetermined velocity. The detectors are of the type which are actuated by means other than mechanical contact with the carrier. The common blower 4 may be replaced by a plurality thereof.