baber/WOPTO huggingface dataset:
Patent GB-563464-A (GB)
Title: Improvements in or relating to thermionic valve oscillators
IPC: H03B5/10
Filed: 1940-06-17
Abstract: 563,464. Valve generating circuits. BLUMLEIN, A. D. June 17, 1940, No. 10472. [Class 40 (v)] A valve oscillator has, in addition to the usual positive feedback coupling, a negative feedback circuit which is brought into action only when the oscillation amplitude exceeds a predetermined value thus limiting the amplitude to this value. As shown the oscillatory circuit 6, 7, 8, 9 is connected in known manner to the valve electrodes in order to provide the positive back coupling. The negative feedback is provided by a resistance 14 in the cathode lead, which, however, is shunted by a low impedance path comprising a condenser 15 in series with a diode valve. This may, as shown, be constituted by an auxiliary anode 5 adjacent to the valve cathode, or may be in a separate envelope. When the oscillations reach the limiting amplitude, the shunt circuit is blocked at the diode on account of the positive potential developed at the cathode, and the negative feedback becomes operative. A resistance 16 connected between the anode 5 and the H.T. supply has such a value that the current therethrough when the anode 5 is positive with respect to the cathode is equal to half the current flowing through the resistance 14. Oscillations of substantially rectangular wave form may be taken from the anode circuit at the coupling 11.
Patent GB-374564-A (GB)
Title: Improvements in or relating to scanning apparatus for use in television and like systems
IPC: H04N3/08
Filed: 1931-04-09
Abstract: 374,564. Television. BAIRD, J. L. and BAIRD TELEVISION, Ltd., 133, Long Acre, London. April 9, 1931, No. 10487. [Class 40 (iii).] A scanning device comprises a plurality of fixed reflectors 8, 9, 10, Fig. 1, and a cooperating rotating reflector 5 whose surface is inclined to the axis of rotation 6. The reflector 5 may be replaced by a plurality of reflectors, each equally inclined to its neighbours and the axis of rotation. Light from a source 1 is directed to the rotating reflector 5 and moves across reflectors 8, 9, 10, to trace adjacent contiguous, discontiguous or overlapping lines on the screen 11. Further fixed reflectors may be placed round the shaft 6 so that the screen is scanned in overlapping or adjacent areas in horizontal and vertical lines and in opposite senses. Reflectors 12 .. 19, Fig. 2, may be used to give radial scanning lines EDC. In this case the translucency of the screen 11 may vary to compensate for uneven illumination or the coefficient of reflection may vary across the surface of the reflectors 12 .. 19. At the transmitter this compensation is unnecessary. The aperture 3 is preferably circular in this modification. In Fig. 3, each fixed reflector 21 corresponds to an elemental area of the screen 11. The mirrors 21 may be arranged so that the elemental areas, which may overlap, are illuminated in a non-sequential order. The mirror system 20 may rotate while the mirror 5 remains stationary. For flood-light scanning the source 1 is replaced by a light-sensitive cell. Several zones may be scanned by multiplication of the apparatus. According to the Provisional Specification, the mirror 5, Fig. 1, may be replaced by a mirror drum in which the mirrors are progressively canted. Where the fixed reflectors 8, 9, 10 are continued round the shaft 6, each mirror may co-operate with an inverting prism. Lenses may replace the mirrors. Specifications 222,604, 326,230, [both in Class 40 (iii), Telegraphs, Electric], and 348,211 are referred to.
Patent GB-342210-A (GB)
Title: Improvements relating to protective devices for electrical transformers and other electrical translating devices
IPC: H02H5/08
Filed: 1930-04-02
Abstract: 342,210. Transformers. ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Bush House, Aldwych, London.-(Assignees of Brown, R. L. ; 1404, Ridge Avenue, Sharpsville, Pennsylvania, U.S.A.) April 2, 1930, No. 10489. Convention date, April 3, 1929. [Class 38 (ii).] Transformers and other electrical apparatus operating in sealed casings containing a fluid insulating medium are provided with a protective device comprising a fluid-operated switch 10 adapted, in the event of increase in pressure of the insulating medium due to a fault in the apparatus, to energize a circuit 21 causing opening of the main circuit-breaker 6 associated with the apparatus. The switch comprises fixed and movable contacts 15, 14 the latter being carried on a collapsable member 12 subjected to the pressure of the insulating medium within the casing 9. A spring may be provided to maintain the contacts apart under pressure variations due to normal changes of temperature, or in order that the switch may only respond to sudden pressure variations occurring under fault conditions, a small hole 17 may be provided in the member 13 so that gradual changes of pressure with normal temperature variations do not effect closure of the switch.
Patent GB-986150-A (GB)
Title: Waistbands
IPC: A41F9/02
Filed: 1962-03-20
Abstract: 986,150. Garment waistbands. R. GRIMM. March 20, 1962, No. 10529/62. Addition to 883,253. Heading A3V. [Also in Division D1]  A modification of the waist band of the parent Specification consists in replacing the belt hook engaging weft loops by woven loops or pockets 64, the openings or opening into said loops or pockets extending warpwise of the waist band so as to receive transversely extending hooks 62 or studs on the belt 60. In the case of studs on the belt a central warpwise opening is provided in pockets on the band. A sewing strip may be provided along one edge of the band which can be folded under the band to mask the sewing thereof to the garment.
Patent GB-319624-A (GB)
Title: Improvements in or relating to closures for bottles and like receptacles
IPC: B65D55/16
Filed: 1929-01-10
Abstract: 319,624. Buck, H. Jan. 10, 1929. Closures completed by outstanding packing- rings; stoppers, means to prevent of.-A stopper for a bottle &c. has a rounded, bulbous or double conical end 12 covered by a resilient sealing member 14 which is compressed against the inside of the neck of the bottle. The stem of the stopper is reduced in thickness at the root 13 so that the stopper can be readily withdrawn by pressing the head at right angles to the neck of the bottle. The proportions of the stopper are such that the distance between the point of contact and the stem with the neck of the bottle and the most remote point in the stem is at all stages of the withdrawal less then the distance between the said point of contact and the nearest point in the neck at the opposite side thereof. The neck has an internal rib 18, Fig. 5, or groove 17, Fig. 9, and the sealing member may be a cork &c. sleeve, or a rubber coating. The stopper may be pivotally attached to the bottle by a wire clip 25.
Patent GB-1218328-A (GB)
Title: Improvements in or relating to a method of concentrating a dilute of an alkyllithium compound
Inventor: RAI VISHVA ROOP
IPC: C07F1/02
Filed: 1969-02-27
Abstract: 1,218,328. Concentrating alkyl lithium solutions. LITHIUM CORP. OF AMERICA. 27 Feb., 1969, No. 10668/69. Heading C2J. A dilute solution of an alkyl lithium compound in a volatile inert organic solvent is concentrated by passing a thin film of the dilute solution over a heated surface (said surface being maintained at a temperature below that of the degredation temperature of the alkyl lithium compound), the thin film being maintained in contact with the heated surface for less than one minute in any single pass, and the concentrated solution may then be recovered. Suitably the temperature is between 70‹ and 85‹ C. and the process is carried out at an operating pressure in the range of from 15 to 150 mm. Hg. In the examples dilute solutions of n-butyllithium in n-hexane were concentrated.
Patent GB-106736-A (GB)
IPC: B23B31/08
Abstract: 106,736. Webb, P. G. Sept. 5, 1916. Chucks and sockets; tool-holders.-Reamers, drills, &c. are held in a drilling-machine spindle or in a turret by means of a floating holder that is automatically self-centring. The tool shank is secured by a screw 2 in a socket 1 formed with a coned end 3 engaging a coned plate 4, screwed to the body of the holder, under control of a spring 1C adjustable by a screwed plug (not shown). The socket is provided with an enlarged head 9, the front face of which preferably seats against the rear of the plate 4 at the same time as the conical surfaces engage. A driving-member C, formed with tongues 13, 14 at right-angles, loosely engages grooves in the socket and body B after the manner of an Oldham. coupling. Under the pressure of the cut, the spring yields and the socket is free to float. When used as a non-rotating holder in a turret, an auxiliary spring 19 may be fitted at the bottom to assist in maintaining the tool in an horizontal position when free from the work. When required for use as a rigid holder, the spring 16 is replaced by a rod enabling the screwed plug to transmit an unyielding pressure to the member C and head 9.
Patent GB-106783-A (GB)
IPC: F16H1/46
Abstract: 106,783. Royce, F. H., and Rolls- Royce, Ltd. Dec. 8, 1916. Transmission. gear of invariable ratio.-The rear axles are fitted with epicyclic reduction gearing comprising sun-wheels 6 which are mounted on the differential shafts 5 and mesh with planetwheels 9 carried by cages 8 on the driving-axles 7. The planet-wheels mesh with fixed internallytoothed wheels 10, and the propeller shaft 1 drives the differential 4 through bevel-gears 2, 3. The reduction gearing may be fitted to a shaft carrying the bevel-wheel 3 when no differential gear is used.
Patent GB-849200-A (GB)
Title: Improvements relating to the connection of elongated members
IPC: E04B1/58
Filed: 1956-10-29
Abstract: 849,200. Connecting structional members. STAHLSCHWEISSWERK WARTMANN A. G. Oct. 29, 1956 [Dec. 17, 1955], No. 10718/60. Divided out of 846,441. Class 20(2) [Also in Group XXVIII] The invention comprises the connection of channel or I section members end to end. A channel member 11 Figs. 2 and 4 has welded in its end a U-shaped member 12 having a trapezoidal base 121 fitting in a corresponding trapezoidal hole in a plate 14 welded to the end of another channel member 13 so that a wedge 17 can be driven between the base 121 and the plate 14. An I section member 19 Fig. 8 has straps 20 welded to its web which fit into a hole 24 Fig. 9 in a plate 23 on the end of another I section member 22, a wedge being driven through slots 21, 25 in the straps and web of the member 22, respectively.
Patent GB-768416-A (GB)
Title: Improvements in or relating to tube fittings
Inventor: WURZEL HUGO
IPC: B64D37/00
Filed: 1955-04-14
Abstract: 768,416. Joining pipes to walls. WALDES KOH-I-NOOR, Inc. April 14, 1955, No. 10735/55. Class 99(1) The end of a tube 11 is pushed through an opening in a flexible wall 10 until a flange 12 abuts the wall and a split spring retaining ring 16 is fitted loosely into position on an inclined wall 15 of a groove 13 adjacent the flange 12 and then contracted, the wall 15 forcing the ring 16 to the left to clamp the wall 10 against the flange 12. The groove 13 is formed by a collar 14 on the end of the tube 11, which collar is provided with cut-out portions 23, Fig. 1, enabling a washer 21, positioned between the ring 16 and wall 10 and provided with complementary cut-out portions 22 to be fitted in position. The ring 16 is contracted by a bolt 31 having two oppositely directed thread portions 29, 30, engaging with similarly threaded nuts 24, 25 having pins 26, 27 engaging in bores in the free ends of the split ring 16, rotation of the bolt causing nuts 24, 25 to move together to contract the ring. The bolt 31 is jaurnalled in two wings 33, 34, formed by bent-up portions of the washer 21. In Fig. 4 a tube 11a connecting two cells 10, 10a, of an aircraft fuel tank is provided with flanges 12, 12a at each end and connected to the flexible walls of the cells in the manner described above. Washers 40 are arranged between the flanges 12, 12a, and the cell walls 10, 10a.
Patent GB-926152-A (GB)
Title: Improvements in or relating to nuclear reactors
Inventor: FRAME ALEXANDER GILCHRIST
IPC: G21C1/02
Filed: 1960-11-28
Abstract: 926,152. Nuclear reactors. UNITED KING- DOM ATOMIC ENERGY AUTHORITY. Nov. 14, 1961 [Nov. 28, 1960], No. 40872/60. Class 39 (4). A nuclear reactor has a core portion, sufficient when removed to make the core subcritical for shutting down the reactor, supported independently in the core by support means capable of carrying the core portion bodily between an active position and a dispersed position by a displacement of the support means which at least in part is angular. In the fast reactor shown in Fig. 2, the core comprises two interfitting halves 16 and 17 (shown separated in Fig. 2) which can be fitted together in the area 13 to form a critical assembly controlled by control plates such as 18. Each half is mounted on a foot 20 fixed to a tube 25 and extending through a slit 21 in a rotary column 22. The tube 25 is coupled by a screw and nut device 27 to a shaft 29 so that rotation of the shaft raises or lowers the tube 25 and the foot 20. When the foot is in its lowest position the column 22 can be rotated through 90 degrees to move the half core to a park area; here provision may be made for refuelling through an eccentric rotating shield arrangement (not shown). In another arrangement, Fig. 3, each half of the core is pivotally connected to the ends of a pair of arms 41 and 42. Each upper arm may be rotated by a rack 44 acting on a pinion (not shown) to which the upper arm is fixed, so that the corresponding half core can be moved from the critical position in full line to the dispersed position shown in dotted lines without change of attitude in transit. Aligned vertically with each of the dispersed positions is an eccentric rotating shield arrangement 47 for refuelling purposes. Specification 907,391 is referred to.
Patent GB-1377601-A (GB)
Title: Semiconductor structure with projecting pillars or the like and method for making the same
IPC: H01L27/04
Filed: 1973-03-06
Abstract: 1377601 Semi-conductor devices SIGNETICS CORP 6 March 1973 [27 March 1972] 10881/73 Heading H1K A semi-conductor body 21 of, e.g. doped silicon having one conductivity type is diffused or ion implanted with dish shaped regions of opposite conductivity extending to its planar surface to define emitter and collector regions with the body as base, and diode or resistor regions forming part of an integrated circuit. An insulant layer 23 of, e.g. thermally grown SiO 2  is formed on the surface in which windows are opened to expose the surface on to which metal, e.g. Al is evaporated to contact the several regions. The metal is removed using photolitho masking to leave adherent leads integral with Al pads 26 spaced round the periphery of the body; the leads extending inwardly from the pads to contact the several regions of the device. A glass layer 28 is deposited over the SiO 2  layer and the leads, in which windows are opened to expose portions of the pads by photoresist masking and etching with HF + ethylene glycol + H 2 O, after which the photoresist is removed. After alloying thermally, a further layer 31 of, e.g. Al is deposited on the glass layer to extend into the openings, and a layer 32 of, e.g. Cr is evaporated thereon as a barrier. A layer 33 of, e.g. Ni is deposited on the Cr by evaporation (Fig. 5). A photoresist mask with windows overlying the pads 26 and their openings is formed on Ni layer 33, and stand off pillars 37 of, e.g. Ni are formed therein, e.g. by electroplating to serve as spacers between the surface and the external leads. A layer 38 of, e.g. Au, a layer 39 of, e.g. Sn, and a further layer 41 of, e.g. Au are electroplated in sequence on the pillars, and the photoresist is removed by solution. A further photoresist layer 43 is formed over the structure (Fig. 12) to underlie the head of the pillars, is baked and is selectively exposed to light, so that after development and solution a band of photoresist remains underlying the pillar head to protect the exposed Sn and Ni layers. The exposed parts of the Ni and Cr layers 33, 32 are electrolytically etched out in H 3 PO 4  with the semi-conductor body as anode, and the exposed Al layer 31 is removed by etching in hot H 3 PO 4  with a foaming agent to limit undercutting. The photoresist band is removed by solvent and the complete device (Fig. 16) is washed and dried. Plural discrete standoffs are connected to pads 26 of the interconnecting leads of the integrated circuit (Fig. 17, not shown). The device is bondable to lead frames of the kind described in Specification 1,359,698 fabricated of Sn plated steel by opposing the frame to the tops of the standoffs in proper alignment and soldering with a gas jet, (Fig. 18, not shown).  The assembly may be plastic encapsulated as described in Specification 1,359,698, or enclosed in a package of glass or ceramic.
Patent GB-374198-A (GB)
Title: Improvements in or relating to electrical resistances
IPC: H01C1/12
Filed: 1931-04-13
Abstract: 374,198. Wire resistances ; couplings. WUNDERLICH & KÍNIG GES., 75, C÷penickerstrasse, Berlin. April 13, 1931, No. 10907. Convention date, April 12, 1930. [Classes 37 and 38 (i).] Direct connections between conductors.-Resistances consisting of wire wound on an insulating support and embedded in a glaze or vitreous enamel are provided with metal contact pins arranged on the support before the glazing process and having openings for the reception of the wire, which is clamped by compression of the pins. The pin 4, Fig. 2, is roughened or threaded at its lower end 3 and is cemented or screwed into the insulating support 6. It is provided with a hole or a slit 5 for the reception of the resistance wire, which may be very fine, e.g. 0À02 mm. diameter. A small piece of solder which softens at the glazing temperature may be inserted at the same time. A stronger wire serving as an external connection may also be inserted. The upper part of the pin is compressed to secure the wire. For a tapped resistance, the insulating support 6 may be provided with a dovetail groove 10, Fig. 8, the contact pins 9 being correspondingly shaped so that pins may be slid into the groove at appropriate points during winding and subsequently secured by the flowing round them of the vitreous enamel. Alternatively they may be cemented in place previous to winding. Connection with the pins may be made by clips 11, Fig. 9, surrounding the body of the resistance. The clip may be provided at the point of contact with a hole into which the head of the pin fits and may be soldered, or with a depression, or slits 18, Fig. 13, may be stamped in the clip leaving a strip 13 which stretches when the clip is tensioned.
Patent GB-1309271-A (GB)
Title: Method of making shoes over sheathed lasts
IPC: A43D21/00
Filed: 1970-03-06
Abstract: 1309271 Boots &c BATCHELDER RUBICO Inc 6 March 1970 [7 March 1969] 10921/70 Heading A3B A method of shoemaking includes the steps of covering at least a portion of the last bottom with a sheath; structurally forming a shoe around the sheathed last; pulling the last from the sheath within the shoe; and thereafter, finishing the shoe including withdrawing the sheath from the shoe. Figure 1 is a flowdiagram showing the various ways in which a shoe may be made. The sheath may be a heat-shrinkable film 34 which completely covers the last 24 (Fig. 11) or may be a partial sheath (not shown) of elastic fabric or plastics material which covers the lower part of the last or is wrapped around the forepart of the last. An insole 42 is then temporarily secured to the sheath 34 on the last bottom by means of double faced adhesive tape 46 or an adhesive film (not shown). The upper is then positioned on the last and may be held in position by a wafer 50 of double faced adhesive tape, the position of the upper being determined by guide marks 48 on the last 24. The shoe is then lasted and completed and the last is pulled from the shoe. The sheath 34 is then removed and discarded or used again. After the sheath is withdrawn, a socklining may be placed inside the shoe and is secured by the tape 46, otherwise the tape 46 is removed. The shoe is then finished in conventional fashion. In a modification of the process the insole is omitted and the upper is lasted directly to the sides and bottom of the sheath, or to a socklining secured to the sheath. A further embodiment describes the process as applied to the manufacture of a moccasin type shoe.
Patent GB-540189-A (GB)
Title: Improvements connected with reflectors of electric-lamp fittings
IPC: F21V17/00
Filed: 1940-06-27
Abstract: 540,189. Reflectors. VERITYS, Ltd., and FORTH, J. W. June 27, 1940, No. 10941. [Class 75 (ii)] The opening 13 in the neck or crown of a reflector is formed with two diametrically opposite gaps 14 enabling the reflector to be threaded over the arms 2, 3 of a spider forming part of a threaded sleeve 6 suspended by a wiring tube or hook, two diametrically opposite vertically depending flanges 15 adapted to seat on stepped portions 5 of the arms 2, 3 when the reflector is turned on the spider, and two pairs of vertically depending stop flanges 16, 17 deeper than the flanges 15 preventing displacement of the reflector when it is secured by cap 8 screwing on the sleeve 6. The upper surface of the reflector crown may be provided with upstanding projections as described in Specification 539,876, so that a ventilation space is provided between the reflector and cap 8.
Patent GB-160090-A (GB)
Title: Improvements in the breech locking mechanism of guns
IPC: F41A3/22
Filed: 1920-04-20
Abstract: 160,090. Thompson, J. T. April 20, 1920. Machine guns.-Relates to automatic guns of the kind having a fixed barrel and a longitudinally sliding non-rotary breech-bolt, and consists in locking the bolt by a rotary ring restrained from longitudinal movement and rotated into the locking position by interengaging surfaces on the bolt and locking-ring by a torsion spring. In the construction shown, the bolt 23 is locked by a ring 37 mounted to rotate in roller bearings in the breech-body 16. The ring has recesses which in the unlocking position of the ring register with the ribs 24 on the bolt. The locking surfaces are inclined at such an angle that after the discharge the ring rotates to unlock the breech when the pressure in the barrel has fallen to a predetermined amount in accordance with the principle described in Specification 14368/14. The ring is rotated to the locking position by lugs 25 on the bolt engaging cam-surfaces 46, Fig. 13, on the ring. In a modification, a torsion spring rotates the ring to lock it. The breech may be opened by hand by means of a spindle 47, Fig. 14, mounted inside the rear part of the bolt and having a stud 48, Figs. 3 and 14, projecting through a quadrant slot 49 in the bolt into a longitudinal slot in the locking sleeve. The spindle is actuated by a handle projecting through a quadrant slot in the bolt and adapted to be connected to the spindle by a bolt 54 which is normally held in the disengaging position by a. spring. The firing- pin comprises a bell-crank lever 26 actuated when the bolt reaches its forward position.
Patent GB-146810-A (GB)
Title: Improvements in removable dental bridge-work
IPC: A61C13/265
Filed: 1920-04-20
Abstract: 146,810. Fairbrother, H., (Neometric Dental Instrument Co.). April 20, 1920. Teeth, artificial.- In removable dental bridge-work, the bridge part comprising a saddle 10 carrying artificial teeth 7 and 8, is fitted with connecting-members 11 made of a metallic strip doubled and bent to the form of a T, the cross-bar of the T being tnus resilient ana adapted to engage firmly the closed bottomed sockets 9 carried by the piers 5 and 6. Either the socket or the T-piece is adapted by a grinding- process to enable the bridge to rock slightly transversely to its length. The sockets and connecting-members are preferably secured to the pier and artificial bridge teeth respectively by soldering in metallic inlays. In a modification, the sockets are carried by the bridge portion and the connecting-members by the piers.