baber/WOPTO huggingface dataset:
Patent GB-640626-A (GB)
Title: Improvements in or relating to frequency indicating arrangements
IPC: H03K3/08
Filed: 1948-06-23
Abstract: 640,626. Frequency measurements; synchronism indicators. BRITISH TELECOMMUNICATIONS RESEARCH, Ltd., and BAKER, G. T. June 23, 1948, No. 16916. [Class 37] In a frequency indicating arrangement suitable for checking the speed of operation of a multi-vibrator, potential varying at the frequency of the multi-vibrator is applied to one terminal of a gas discharge tube, to the other terminal of which is applied potential derived from a standard frequency source, whereby the tube is caused to flash at a frequency corresponding to the difference between the standard frequency and that of the multi-vibrator. A multi-vibrator MV comprises two triodes V1, V2, the grid of each of which is connected to the anode of the other through a capacitor. Potential is applied to the grids from the anode of a control valve V3 through fixed resistors R5, R6 and an adjustable resistor R4. A drive for controlling a teleprinter is taken over a lead D from the anode of the valve V2 by way of a capacitor C1. Normally the valve V3 is biassed so as to be non-conducting, so that the anode potential is substantially equal to that of the high-tension source. The grid of the valve V3 is controlled from the teleprinter distributer so that when the position corresponding to the stop element is reached the valve V3 conducts and the time period of the multi-vibrator is increased. One terminal of a neon tube NT is connected through a resistor R1 to the anode of the valve V2, the other terminal being connected to a potentiometer formed by resistors R2, R3, the values of which are chosen so that the potential on the terminal of the tube is the mean of the anode potential of the valve V2 and the swing is not sufficient to cause the tube to strike. Contacts S1, S2 are the contacts of a key which is operated to bring the indicator into use, the contact S1 opening the cathode circuit of the valve V3 so as to prevent the extension of the period corresponding to the stop element and the contact S2 connecting the terminal of the tube NT to the 50-cycle mains through a capacitor C2. If the multi-vibrator is operating at exactly 50 cycles per second and is in phase with the mains, the potential across the tube NT is the difference between the anode potential and the mains potential, and the tube does not strike. If the frequency is not correct the tube strikes and gives a visual indication. The frequency at which the tube flashes is a measure of the frequency difference and the speed of the multi-vibrator may be altered by adjusting the resistor R4 until the tube no longer flashes.
Patent GB-291626-A (GB)
Title: Improvements relating to multiple core electric cables
IPC: H01B9/02
Filed: 1927-06-25
Abstract: 291,626. Brown, W. June 25, 1927. Cables with auxiliary conductors.-Relates to a cable of the " cabtyre " type in which two or more insulated conductors, 2, and an uninsulated earthed conductor 5, are incorporated, the whole of the conductors being wrapped around with a flexible metallic screen consisting of wires which are in contact with the conductors. According to the present invention, the flexible metallic screen consists of a single group of wires 6 which are wound helically and unidirectionally around the conductors.
Patent GB-652368-A (GB)
Title: Improvements in and relating to sockets for electric photoflash lamps
IPC: G03B15/04
Filed: 1947-06-27
Abstract: 652,368. Lamp-holders. KALART CO., Inc. June 27, 1947, No. 17028. Convention date, Jan. 8, 1940. [Class 38 (i)] A socket for photo-flash lamps and having lamp-ejector means comprises a tubular shell 23a having L-shaped bayonet slots 24, 241 receiving lamp locking pins 22, 22<SP>1</SP>. Partially surrounding the shell is a split collar 27 having inwardly-bent tongues 27c entering the horizontal portions of the slots 24, 24<SP>1</SP> and being maintained at the rear end thereof by reason of the portion 27k of the collar carrying the tongues having limited rotating movement on the shell and being urged to the aforesaid position by a spring 28a located between ears 28, 28<SP>1</SP> on the portion 27k and on a portion 27e riveted to the shell. The lamp is inserted against the pressure of a spring 17 which urges a washer 26<SP>1</SP> carrying one contact for the lamp into engagement with the lamp. When the lamp has been flashed, finger pressure on the ears 28, 28<SP>1</SP> causes the tongues 27c to move the lamp pins into the vertical portions of the bayonet slots, whereupon the lamp is ejected by the spring 17. The lower portion of the shell 23a is fitted with a screw plug 30 for insertion in a standard lamp socket. The Specification as open to inspection under Sect. 91 also describes a socket wherein the shell 113, Fig. 6 (Cancelled), is mounted in an insulating body 111, and the base of the shell carries a spring plunger 123 serving as the ejector and one contact for a lamp 140, a pivoted locking lever 131 projecting through a slot 134 in the shell and having a nose 131<SP>11</SP> which presses on the lamp cap 142, the lever being spring urged so as to prevent withdrawal of the lamp. Anti-clockwise movement of the lever disengages it from the lamp and allows the plunger 123 to eject the latter. Since the lamp cap does not carry locating pins, it may be inserted in any position. Fig. 8 (Cancelled) shows a further modification for a lamp having locating pins 150 wherein in order to facilitate insertion. of the lamp, the shell 113<SP>1</SP> is divided into a number of resilient fingers 113a, tapered at the top to guide the pins into slots between them. The locking lever 131 which may be used as one conductor if desired, may have several sharp noses for gripping a screwthreaded lamp cap. The screw-thread may be formed by one of the lamp leads being wrapped round the lamp cap. In another modification, Fig. 12 (Cancelled), the shell 113 is omitted and the lamp leads are brought out to two contact studs 164, 172 which engage two spring ejector and contact plungers 123, 123<SP>1</SP>. This subjectmatter does not appear in the Specification as accepted.
Patent GB-878397-A (GB)
Title: Improvements in looms
IPC: D03D47/48
Filed: 1958-05-28
Abstract: 878,397. Shuttleless looms; temples; forming selvedges. ETABLISSEMENTS SEYDOUX & MICHAU REUNIS. May 28, 1958 [June 3, 1957; April 18, 1958], No. 17055/58. Class 142(2) Temples, Fig. 5b. In addition to the fabric being held by normal temples, the selvedge warp threads are gripped immediately behind the fell by jaws 10, 11, respectively fixed to and pivoted on a lever 9; during beat-up, a striker 12 on the slay displaces a dog 11c which rocks on its pivot 11 a to depress the jaw 11, and moves the lever 9 about its pivot 8 to raise jaw 10. Weft inserters, Fig. 10. Weft is taken halfway through the shed by a weft inserter 47 and the remainder of the way by an inserter 42. The weft 43 from the supply passes through an eye 47a and, being still attached to the preceding pick 49, becomes trapped under a spring blade 47b as the weft inserter enters the shed. The portion 49b is beaten-up by a heel 47e and drawn taut over a blade 47d which cuts it, thereby forming a tucked in selvedge from the portion 49b. When the weft inserters meet, the stretch of weft between the eye 47a and the clamp 47b snaps into a slot 42x in the inserter 42 and, as the inserters separate, becomes wedged between a lip 42a and a blade spring 41a. Forming selvedges, Fig. 7a. At the entry side of the shed, a tucked-in selvedge is formed as described above. At the other side, the weft projecting from the shed (and still gripped by the weft inserter 42) is carried between upper and lower jaws of a gripper 37 and between scissorlike cutting and clamping blades 15; the gripper 37 closes to grip the weft near the selvedge and the blades 15 cut the weft and clamp the piece gripped by the weft inserter 42. A lever 41 on the weft inserter then encounters a resilient stop 40 which maintains pressure on it throughout the front part of the movement of the slay, so that as the slay recedes the weft end is drawn out of the weft inserter and left in the clamp 15. When the slay has receded farther, the gripper 37 moves rearwards and turns to tuck the weft end 43a into the shed, where it holds it until the next pick has been inserted. In another embodiment, the blades 15 merely clamp the weft, cutting being performed by the gripper 37; the upper jaw, Fig. 25, is provided with a cutting blade 94b which enters a slot in the lower jaw 93. Holding weft ends, Fig. 18a. In order that different widths of fabric can be woven without altering the stroke of the weft inserters, an addition clamp 60 is provided in one embodiment. As the weft inserter 42 emerges from the shed, a fixed striker 53 causes a lever 51 to swing jaws 60 forward to grip the weft thread; as the weft inserter continues its movement, the weft end is left hanging from the jaws 60. The gripper 37 and the cutting and clamping blades 15 function as described above.
Patent GB-1418676-A (GB)
Title: Lattice network using distributed impedance transmission lines
IPC: H01P3/08
Filed: 1972-12-08
Abstract: 1418676 Microwave lattice filter RCA CORPORATION 8 Dec 1972 [9 Dec 1971] 17079/74 Heading H1W A microwave lattice network utilizes a "staggered transmission line" (Sepcification 1,418,675). Such a line comprises two similar conductive plates 46, 16 with adjacent, parallel edges 22, 30 overlapping, underlapping or in the same longitudinal plane and spaced from each other by a dielectric medium, e.g. a substrate 1. Wave energy is propagated in the medium between the edges. The plate 46 is formed with a slot 52 which provides a slot transmission line extending from the edge 22 to a point on or adjacent to the outer edge 48. The same plate 46 is further provided with a conductive stub 47 which extends from a point on the edge 22 adjacent the slot 52 to a point overlying the plate 16. Stub 47 and plate 16 together provide an open-circuited strip transmission line (stripline). The plate 16 is modified in a similar fashion, as is indicated by broken line. Conductors 56, 64 are provided between plates 46, 16 to shortcircuit the staggered transmission line at points equally spaced from the slots 52, 70 thus providing stubs 34, 36. The slots 52, 70 provide balanced input/output lines and input/output terminals A, A<SP>1</SP> B, B<SP>1</SP> are shown both on Fig. 6 and on the equivalent lattice of Fig. 4. Series impedance Z A  between A and B is provided by the short-circuited stub 34 formed in the staggered line, and cross impedance Z D  between B and A<SP>1</SP> is provided by open-circuited stripline stub 47, the impedances Z B , Z C  being provided in a similar manner. A constant resistance lattice filter may be realized by making the stub lengths equal to #/4 at the centre frequency and adjusting the characteristic impedances such that Z A .Z B  = 1. If the stubs 47, 54 are short-circuited, a rejection filter is obtained. The input and output signals may be coupled to and from the balanced slot lines 52, 70 by intersecting striplines 4, 78 which provide unbalance/balance transformation.
Patent GB-111532-A (GB)
Title: Improved Education Pipe for Air-lift Pumps.
Inventor: PURCHAS ARTHUR WILLIAM
IPC: F04F1/18
Filed: 1916-11-30
Abstract: 111,532. Purchas, A. W. Nov 30, 1916. By aerating ascending column. - In an air-lift pump, the portion of the eduction pipe A above the water in the well is reduced in cross-section, and the portion towards the outlet may increase in cross-section either in steps or uniformly.
Patent GB-461227-A (GB)
Title: Improvements in or relating to the conveyance of boiling or gaseous liquids
IPC: F04D9/00
Filed: 1936-06-20
Abstract: 461,227. Centrifugal separators. DMITREVSKIJ, P. June 20, 1936, No. 17231. [Class 23] [Also in Group XXVI] A centrifugal pump for boiling liquids or liquids containing gases wherein the inlet mixture is set in rotation so as to produce a hollow cylinder of liquid before it enters the impeller, has an impeller 2 provided with a cylindrical conical or other shaped axial extension 3 rotating in a casing 1, the impeller and its extension being fitted with blades 4. The boiling liquid is admitted tangentially to the casing through a port 9 and the vapour separated by centrifugal action passes up a central tube 8 and out through a hole 7 in a cap 6. Holes 5 are formed in the walls of the extension 3 and a hole 10 is formed in the casing 1 at the same level so that pressure acting upon a spring loaded piston 20 regulates the rate of inflow and keeps the thickness of the cylindrical column of liquid constant.
Patent GB-128106-A (GB)
Title: Improvements in and relating to High Speed Electric or other Locomotives.
IPC: B61F3/04
Filed: 1918-10-23
Abstract: 128,106. British Thomson - Houston Co., and Carter, F. W. Oct. 23, 1918. Axle-trucks and bogies.-The bogie-truck of a locomotive is provided in addition to the usual centring-device with an appliance adapted to aline the truck frame with the frame of the locomotive. The lining-device is particularly applicable to the trailing bogie of a high-speed electric locomotive, and may be fitted to the guiding and trailing bogies of a locomotive having a symmetrical wheel-base, manually or automatically operable means being provided for putting the device out of action on the particular bogie which, according to the direction of running, is at the front of the locomotive. The bogie frame 3, Fig. 3, is pivoted to and centred in the locomotive frame 1 in the usual way, and is fitted with an alining-device comprised of stiff springs 6, adapted to contact with the main frame and connected to more flexible springs 7. One of these compound spring appliances is mounted at each side of the bogie-frame, and the two are connected by toggle-linkage 9 connected to an hydraulic or pneumatic cylinder 8. adapted to collapse the toggles when required and render the alining-device inoperative. In a modification, the alining-device may consist of pairs of opposed coiled springs acting on the bogie and the main frame or the coiled springs 5. Fig. 7, may act on beams 10 centrally pivoted to the ma.in frame. By means of wedge-blocks 11 adapted to be inserted between the main frame and the beams 10, the device is made operative in inoperative at will.
Patent GB-916080-A (GB)
Title: Exposure control device for a photographic camera
IPC: G03B7/28
Filed: 1960-05-17
Abstract: 916,080. Photo-electric exposure control. BELL & HOWELL CO. May 17, 1960 [May 29, 1959], No. 17356/60. Class 40 (3). A camera with a photo-electric cell for controlling the exposure is provided with a second cell, to reduce the effect of back-lighting. A cine-camera, Fig. 2, has a photo-voltaic cell 16 having a field of view restricted to 40 degrees in the vertical plane and 80 degrees in the horizontal plane by two grids 13, 14. A photo-voltaic cell 25 having an area about <SP>1</SP>/100, the area of cell 16 has a field of view of 150 degrees in each plane. The cells are connected in opposition in series with a meter 21, Fig. 4, which controls the exposure and a thermistor network 27 for temperature correction. Cell 25 may be replaced by a photoresistive cell in parallel with cell 16.
Patent GB-146195-A (GB)
Title: Improved method of casting aluminium pistons
IPC: B22C9/24
Filed: 1920-06-25
Abstract: 146,195. Rautenbach, R., [Firm of]. Dec. 3, 1917, [Convention date]. Moulds; cores.-Aluminium pistons are cast in an iron mould a having a central sand core b down the middle of which is a pouring-gate a. Vents d, e are provided and steel bearing-bushes to be cast into the piston are supported by the core at f, g. Metal chills or supporting pieces may be inserted in the core. The method is stated to be applicable generally for castings of low melting-point, such as magnesium or magnesium alloys.
Patent GB-544317-A (GB)
Title: Improvements in hooks
IPC: F16B45/02
Filed: 1940-12-07
Abstract: 544,317. Hooks. BARTON, P. C. Dec. 7, 1940, No. 17404, [Class 89 (ii)] Crane &c. hooks are moused by a U-shaped link 6 having an arcuate surface 6a co-operating with a corresponding surface 4b on a projection from the collar 4 on the threaded shank. These surfaces are struck from a centre x laterally displaced from the centre of the pivot so that when the mousing piece contacts the abutments 4c the arcuate surfaces are in contact.
Patent GB-1158643-A (GB)
Title: Transistorized Line-by-Line Clamp Circuits
Inventor: ATTEW JAMES EDWARD
IPC: H04N5/18
Filed: 1965-04-26
Abstract: 1,158,643. Television clamping. AUTOMATIC INFORMATION DATA SERVICE Ltd. 22 July, 1966 [26 April. 1965], No. 17426/65. Heading H4F. The invention relates to a transistor clamping circuit and particularly describes its application to clamping television black level signals. The signal source 11 has an impedance Rs and feeds its signal via biasing capacitor C to the base of transistor VT 2  and the emitter of clamping transistor VT 1 . The black level in the signal is clamped to a bias potential on the collector of VT 1  by the application of switching on synchronous clamping pulses 13 to the base of VT 1 . Transistors VT 2  and VT 3  are a compound pair connected so as to present the required high output impedance to VT 1 . The output signal appears across load resistor R L  at 14. The collector of VT 2  may be connected directly to the potential source V 1  whence VT 2  acts as an emitter follower. N-P-N transistors may be used.
Patent GB-955333-A (GB)
Title: Stabilization of reduced metal catalyst and apparatus therefor
IPC: B01J23/755
Filed: 1960-05-17
Abstract: A method of stabilizing pyrophoric reduced metal catalysts against atmospheric oxidation comprises entraining such catalyst successively in a plurality of distinct streams of a non-oxidizing carrier gas containing controlled quantities of oxygen, each successive gas stream containing a progressively higher concentration of oxygen by volume until the catalyst is stabilized and separating the catalyst from the final stream of carrier gas.  The carrier gas is preferably CO2, but may otherwise be N2, rare gases or water vapour; the added O2 may be pure or admixed with CO2 or N2 or in the form of air.  The catalysts may be, e.g. Ni or Co and may be prepared by precipitating the carbonate on a carrier such as kieselguhr.  A -325 mesh Ni/kieselguhr catalyst is specified.
Patent GB-109170-A (GB)
Title: Work Guiding Devices for Sewing Machines.
Inventor: FAIRWEATHER WALLACE
IPC: D05B35/08
Filed: 1916-12-06
Abstract: 109,170. Fairweather, W., (Singer Manufacturing Co.). Dec. 6, 1916. Sewing - machines; folding- devices; presser-bars, - In a machine for forming and stitching a number of tucks, means are provided for simultaneously or successively lifting the presser-foot and the upper member of the tuckferming device. The presserbar S, Fig. 3, is pressed down by a flat-spring 10 and carries a fixed block 12 embraced by the branches of a, yoke member 13, which is provided with two pins 14, 15. The pin 15 carries two rollers, one or which engages the cam-surface 21 of the hand-lever 22 for ,raising the presser-bar; and the pin 14 engages one end of a lever 18, the other end of which is connected to a, treadle or the like through the rod 20, for alternatively raising the presser-bar. The other roller on the pin 15 rides over the cam-sunface of a finger 43 of an arm 40, which carries the upper tuck-forming device and is pivoted at 42 to a, bracket which is secured to the machine head. The arm 40 is pressed down by a spring 48 contained in a boss 46 of the bracket and adjusted by a screwplug 47, and carries an adjustable stop-screw 51 bearing against a step 52 ior determining the relative positions of the tuck-forming devices. These devices are of the type described in Specification 13408/12 and comprise an upper plate 34 secured to the arm 40 and having on its underside converging ribs 33, Fig. 8, which are adapted to enter between similar ribs carried by a plate 30, which is secured to a plate 28 having a rib 27 entering a groove in the plate 26 and secured therein by a screw 27<1> The plate 26 has a shank 25 adjustably secured by a screw 25<1> in a boss in the workplate. The forward ends of the converging ribs on the plate 30 terminate in laterally inclined blades, the parts intermediate the blades being overlain by the tuck-guiding blades 63, Fig. 7, formed on laterally and downwardly curved wings 62 depending from bosses 61 with stud-pins 60 adjustably secured in a carrier 57, which is secured to a downwardly and forwardly extending arm 56 attached to the bracket on the machinehead, in rear of the needles.
Patent GB-912800-A (GB)
Title: Compound expanded organic polymeric material
IPC: C08J9/42
Filed: 1961-05-15
Abstract: Weldable compound expanded materials are produced by impregnating or spraying an expanded organic polymeric material with a paste of polyvinyl chloride containing expanding agent and expanding and gelling the polyvinyl chloride in the cells of the initial expanded material by heating.  The expandable paste used in Example 1 contains expanding agent (diphenylsulphone-3,31-disulphhydrazide) and plasticizer (dinonyl phthalate).ALSO:Weldable compound expanded materials are produced by impregnating or spraying an expanded organic polymeric material with a paste of polyvinyl chloride containing expanding agent and expanding and gelling the polyvinyl chloride in the cells of the initial expanded material by heating.  A skin of synthetic leather or polyvinyl chloride free from expanding agent may be welded to the product.  In the examples, (1) a motor sun blind is made by lining a pre-heated mould with a polyvinyl chloride paste free from expanding agent; placing in the mould a plate of polyesterisocyanate expanded material impregnated with a polyvinyl chloride paste containing expanding agent (diphenylsulphone-3, 31-disulphhydrazide) and dinonyl phthalate plasticizer; and heating the mould (2) a synthetic leather is welded to a compound polyurethane-polyvinyl chloride expanded material and (3) a polyvinyl chloride hose is produced on an extruder by means of a transverse head tool and through the transverse head is drawn a circular profile of polyesterisocyanate expanded material impregnated on its outer surface with polyvinyl chloride paste containing expanding agent; a composite sheathed expanded material is formed.
Patent GB-497739-A (GB)
Title: Polyvinyl acetal resin compositions
IPC: C08K5/10
Filed: 1937-06-24
Abstract: Water - insoluble polyvinyl acetal resins acetalized between 35 and 94 per cent and containing hydroxyl groups but substantially no ester groups, are compounded with water-insoluble plasticizers in the presence of a volatile organic liquid which will wet or swell, but not dissolve, the resins.  The resin may be prepared from a polyvinyl body of molecular weight above 10,000, preferably above 25,000; the aldehyde used may be aliphatic, with two to six carbon atoms, preferably saturated and straight-chained, e.g. propionaldehyde, butyraldehyde, or valeraldehyde.  The organic liquid may be added to the resin before, during, or after the addition of the plasticizer, or the latter may be added as a solution in the liquid; the mixing may be done in a kneading or like machine, with heating.  The quantity of liquid used may be 50-200 per cent by weight of the resin.  There are specified: liquids-ethers, e.g. di-ethyl ether, dipropyl ether; esters, e.g. ethyl acetate; ketones, e.g. acetone, methyl amyl ketone; hydrocarbons, e.g. benzene, toluene, hexane; or chlorinated hydrocarbons, e.g. chloroform, ethylene dichloride; plasticizers -phthalates, tartrates, and succinates of glycols, glycol ethers, and lower alcohols, e.g. diethyl phthalate, di-n-butyl phthalate or tartrate, bis-b -dichlorethyl phthalate, bis-b -n-butoxyethyl phthalate; and those described in Specification 497,737.  The compositions may be used as interlayers for safety glass.  The Specification includes examples.