baber/WOPTO huggingface dataset:
Patent GB-937542-A (GB)
Title: Frequency stabilizing network
IPC: H03L7/10
Filed: 1961-07-20
Abstract: 937,542. Automatic frequency-control systems. COLLINS RADIO CO. July 20, 1961 [Jan. 3, 1961], No. 26374/61. Class 40 (5). An oscillator is frequency stabilized by mixing its output with a pulse train forming a spectrum of harmonic frequencies nf 1  equi-spaced at the pulse recurrence frequency f 1  to derive through a narrow pass-band filter, tuned to a multiple of, e.g. twice the pulse recurrence frequency f 1 , an output at around this frequency amplitude modulated by the oscillator frequency drift, if any, from an exact multiple of f 1 . The filter output is then rectified and after superimposing on a mean negative bias voltage, applied as A.F.C. voltage to a variable reactance, e.g. capacitor, across the oscillator tuned circuit. Further, if the A.F.C. output exceeds a predetermined positive voltage a circuit 19 renders normally blocked transistors 86, 91 conductive (the latter for a short time only due to the time constant of R.C. circuit 95, 96) and short-circuits the base/collector path of NPN transistor 83 and hence the A.F.C. voltage so that a sawtooth form of the latter is produced and sweeps the oscillator frequency until it locks in with a harmonic nf 1 , whereupon the sawtooth circuit 19 is inoperative. The harmonics nf 1  may be derived by squaring the output of a stable oscillator of frequency f 1 , then differentiating it across the output inductor 38 of a transistor pulse spectrum generator 12, rectifier 39 removing positive peaks. The negativegoing pulses are applied to the collector of a mixer 11, with the oscillator frequency to be stabilized applied to the emitter, a mixed output (fully modulated) being taken from the collector and applied to the filter 15 tuned to 2f 1 . Specification 937,541 is referred to.
Patent GB-601882-A (GB)
Title: Improvements relating to lever-operated electric switches
IPC: H01H23/16
Filed: 1945-10-10
Abstract: 601,882. Snap-action switches. PARSONS, Ltd., C. H., and HANDLEY, G. B. Oct. 10, 1945, No. 26396. [Class 38 (v)] A switch suitable for A.C. circuits comprises an insulating block 27 carrying on either side, cams 36 which bear on blade-spring contacts 20, and force them out of normal spring- biassed engagement with fixed contacts 21, when the block 26 is rocked by the tumbler lever about a pin 28 engaging a recess 32 in its base. The tumbler is pivoted on a pin 23 so that the spherical knob 26 on the lower end of the lever enters a recess in the block and bears on a compression spring (not shown) housed therein to impart a dead centre snap-action. The cams 36 may be symmetrically placed so as to provide a double-pole switch or they may be reversely set so that one contact closes a circuit as the other opens a circuit. The contact-springs are preferably of phosphorbronze, and the Provisional Specification states that they may be re-inforced with steel C springs fitted over the bowed parts 40.
Patent GB-1133555-A (GB)
Title: A device for the insertion of hypodermic needles
IPC: A61M5/46
Filed: 1967-06-08
Abstract: 1,133,555. Device for inserting hypodermic needles into the skin. E. VALENTIN. 8 June, 1967 [20 June, 1966], No. 26439/67. Heading A5R. A device for inserting a hypodermic needle into the skin comprises a rod 8 having a needle holder at its bottom end and slidable in a tube 1 having a non-circular aperture at its top end, the rod having a portion 11 of reduced diameter and circular cross-section and being biassed by a spring 19 towards the lower end of the tube. The tube 1 may be provided with extensions 2, 3, extension 3 being longitudinally adjustable. To insert a hypodermic needle in the skin, a needle 20 is placed in the holder and the rod is pulled up and twisted a quarter of a turn to allow the shoulder above the portion of reduced cross-section to rest on top of the tube. The end of the tube is then placed at the desired injection site and the rod is twisted by another quarter of a turn whereupon the rod is pushed downwards by the spring, the needle penetrating the skin. The needle may then be separated from the needle holder, and a syringe attached to the needle.
Patent GB-1142045-A (GB)
Title: Vapor diffusion coating process
Inventor: SCHLEY JOHN RICHARD
IPC: C23C10/52
Filed: 1966-06-14
Abstract: 1,142,045. Diffusion coating. UNION CARBIDE CORP. June 14, 1966, No.26455/66. Heading C7F. Metallic articles, e.g. of Ni, Co, Fe or Cu base alloys, are diffusion coated by embedding them in a mixture of pre-alloyed particulated charge material e. g. comprising 15-37% Al and balance Fe and/or Ni with incidental impurities, halide carrier material e. g. 0À25-3% of one or more of ammonium, aluminium and nickel halides such as NH 4  Br and AlCl 3 , and particulated SiC e. g. between 20 and 85%, and heating at least 400‹ C. e. g. between 400 and 655‹ C. with the exclusion of air. The charge material and SiC may be of particle size 100-840 microns. Coatings of alloys of Fe-Al-Si or Ni-Al-Si are stated to be formed. The articles may be gas turbine components, furnace tuyeres, hot pressing dies or exhaust valves.
Patent GB-1317815-A (GB)
Title: Semiconductor strain sensor with controlled sensitivity
IPC: G01B7/16
Filed: 1970-06-02
Abstract: 1317815 Semi-conductors strain sensors GENERAL ELECTRIC CO 2 June 1970 [9 June 1969] 26526/70 Heading H1K [Also in Division G1] The sensitivity of a semi-conductor strain sensor element constituted by a field effect transistor 11 is controlled by varying the gate voltage on the transistor, which is placed in a bridge circuit including a second field effect transistor to which the same gate voltage is applied. The element 11 may be a Si MOST, a junctiongate device or CdS IGFET formed integrally in a semi-conductor cantilever beam 21. Bridge circuits are described in which the gate voltage is varied firstly to compensate for variations in sensitivity as a function of ambient temperature and secondly to linearize the output voltagestrain characteristic by a feedback network. Reference has been directed by the Comptroller to Specification 1,206,299.
Patent GB-584122-A (GB)
Title: Improvements in or relating to unions for coupling pipes or conduits
IPC: F16L19/02
Filed: 1945-10-11
Abstract: 584,122. Pipe couplings. KNIGHT, F. H., and WATTS, R. T. Oct. 11, 1945, No. 26546. [Class 99 (i)] A union for coupling pipes or conduits comprises a pair of sleeves 14, 16 formed from tube stock and a pair of collars 19, 23 attached one to each sleeve, the collar 19 being threaded to receive a coupling nut 31, which is internally flanged to engage the collar 23. The collars may be attached by threading, Fig. 1, or by welding brazing, soldering or other means. In a modification, Fig. 6, the collars are arranged to abut the sleeve ends. The 'collar 19 may be recessed at 22 to receive a sealing ring positioned by a bevel surface 27 on the sleeve 16.
Patent GB-917773-A (GB)
Title: Improvements in or relating to methods of manufacturing semi-conductive devices
IPC: H01L21/18
Filed: 1959-08-04
Abstract: 917,773. Semi-conductor devices. PHILIPS ELECTRICAL INDUSTRIES Ltd. Aug. 4, 1959 [Aug. 7, 1958], No. 26566/59. Class 37. In the alloy-diffusion process, in which a material containing a segregating impurity of one type is alloyed to a semi-conductor body and at the same time a diffusing impurity of the other type is diffused into the body via the liquid-solid interface, that region of the diffused zone which is partly compensated by diffusion of the segregating impurity is eliminated by melting to a least half its depth by a subsequent short thermal after-treatment. As shown in Fig. 1, a pellet 2 containing 94% neutral Bi or Pb, 5% segregating impurity A1 and 1% diffusing impurity As is alloyed to a semiconductive body 1 of P-type Ge by heating at 760 C. in a neutral atmosphere, for 15 minutes. On cooling an alloy zone of P-type Ge, doped with A1, is formed, together with the diffusion zone 4 of N-type Ge, doped with As. Arsenic is also diffused into a surface zone 5, either from the material 2 or from a surrounding atmosphere, the zone 5 enabling connection to be made to the zone 4. During the process some Al diffuses into the body 1 and partly compensates the effect of the As in the diffused zone 4. Fig. 2b shows the modulus of the difference between the number of acceptors N a  and the number of donors N d  in various regions and whereas to the left of point 14 and to the right of point 19 acceptors predominate to form the P-type conductivity, the region 14-16 between shows the partial compensation of the impurities in the N-type zone. The diffusion penetration depth of Al is about 0.2Á and the partly compensated region is eliminated, as shown in Fig. 2c, by a thermal after-treatment with an increase in temperature of 2 C. over the alloy diffusion temperature of 760 C. for 30 seconds. An ohmic connection to the base zone 4 may be made via surface zone 5 by means of an annular contact 10 of 99% Pb and 1% As. The body 1 is soldered to a Ni connector 7 by a galliumindium alloy 8. The process is applicable also to silicon and Group III/V alloys, and to the manufacture of PNP or NPN transistors, " Hook " transistors, or devices in which the diffused layer is a drift region of the same type as the semi-conductor.
Patent GB-1255408-A (GB)
Title: Heat-absorbent hygroscopic brines
IPC: B01J19/00
Filed: 1969-05-23
Abstract: 1,255,408. Refrigeration. BORG-WARNER CORP. 19 May, 1969 [25 June, 1968], No. 26592/69. Heading F4H. An absorbent solution for use in an absorption refrigeration system comprises a hygroscopic brine as the adsorbent solution, e.g. 55-60% lithium bromide, a reducible corrosion inhibitor, e.g. 0À05 to 2% lithium chromate, and a monohydric tertiary alkyl alcohol having 6 to 12 carbon atoms, e.g. 0À01 to 1% of 5- methyl-5-undecanol.
Patent GB-1300434-A (GB)
Title: Method of and apparatus for longitudinally cutting webs of thermoplastic synthetic plastics material
Inventor: SHEARD PERCY
IPC: B26D1/22
Filed: 1970-06-03
Abstract: 1300434 Cutting sheets of plastics material; finishing edges P SHEARD and B SHEARD 27 Aug 1971 [3 June 1970] 26690/70 Headings B5A and B5K [Also in Division D1] A web or sheet M of thermoplastic synthetic plastics material is slit longitudinally and the slit edges heat sealed by a heated rotary cutter 22 working against a backing roller 4 over which the web or sheet passes. The web or sheet may be a knitted or woven fabric, e.g. of polypropylene fibres. The cutter 22 comprises an electrically heated disc journalled in the upper limb of a cranked arm 21 pivoted at 20 on a bracket 19 secured on a split block 16 which is secured on a tubular support 13 by a screw clamp 15 so as to be adjustable therealong. The block 16 loosely engages a spline 17 so as to be angularly adjustable through a few degrees. A tension spring 23 pulls the lower limb of the arm 21 down towards a stop 27 on the block 16 but the arm 21 can be adjusted towards and away from the block 16 by a screw 24 acting on the block through a compression spring 25. Engagement of a pin 28 on the bracket 19 in a slot 29 in the arm 21 limits the movement of the arm 21. The temperature of the disc 22 is sensed by a probe carried by a finger 30 mounted by a bar 31 on the arm 21. If the roller 4 stops, a fluid-operated ram 30, Fig. 1, is automatically operated to move the support 13 angularly through a torque arm 32 to lift the disc 22 from the web or sheet M. Pressure is applied to smooth the cut edges whilst they are still soft by a freely rotatable steel roller 34 pressed against the roller 4 by a spring 38. In order to prevent the cut edges joining together again, they are diverted by leading the cut strips around a dividing roller or rollers, by drawing the strips over and/or under one or more smooth surface bars or plates or by providing a dividing plate aligned with the disc 22. Several cutting assemblies may be mounted side-by-side across the support 13 to form a number of parallel slits.
Patent GB-937318-A (GB)
Title: Ingot stripping and handling apparatus
IPC: B22D29/04
Filed: 1961-07-24
Abstract: 937,318. Ingot strippers. MORGAN ENGINEERING CO. July 24, 1961, No. 26787/61. Class 83 (1). [Also in Group XXX] In an ingot stripper comprising a stripping plunger 25 reciprocable within a barrel member 13 and lifting tongs 32 carried by the barrel for handling the stripped ingot, the barrel is rotatable about a vertical axis to allow for orienting an ingot carried by the tongs 32. The tongs are actuated by reciprocation of the plunger 25 which in turn is actuated by a screw mechanism within the barrel. To avoid the attendant disadvantage that the screw mechanism may turn to cause the tongs to lose their grip during the ingot-orienting rotation of the barrel, the invention provides selectively operable mechanism whereby the screw and the barrel may be coupled for rotation as a unit and thus prevent reciprocation of the plunger and consequent tong de-actuation during such rotation. To reciprocate the plunger for stripping, motor 53, Fig. 1, drives gears 57, 58, 59 to rotate a splined shaft 21 to which is keyed a hollow screw member 22. The interior of the latter (see Fig. 2) engages threads 23a on the plunger stem 23 and its exterior engages internal threads 13a on the barrel 13. Both the plunger 25 and the barrel are restrained from rotation during stripping, the former by key and slot 24, 29 and the latter by a brake on a motor 68, Fig. 1, which is connected through gears 73, 74, 75 to the barrel 13. The coupling of the motor 68 to these gears includes a clutch unit 62, inoperative at this stage, for coupling the shafts 60, 61 of the gear elements 57, 73 of the plunger-reciprocating and barrel-rotating drives respectively. When the stripping plunger retracts, the two pairs of tongs 32 and 37 close, the former to engage the ingot and the latter to hold down the mould from which it has been stripped. Once the ingot has been gripped, motor 68 may be unbraked and driven to rotate the barrel and with it the tongs. The starter circuit for motor 68 includes means for automatically engaging the clutch in unit 62 so that the screw member 22 is driven at the same rate as the barrel, thereby preventing reciprocation of the plunger.
Patent GB-1074705-A (GB)
Title: Improvements in or relating to folding devices for folding wrappers on cylindrical objects
IPC: B65B25/14
Filed: 1964-06-29
Abstract: 1,074,705. Wrapping cylindrical rolls. S. T. SANDBERG. June 29, 1964 [June 28, 1963], No. 26870/64. Heading B8C. Self-locking folds 13 (Fig. 1), are formed in the end of a wrapper on a roll 10, as the roll rotates, by folders 23 on arms 17 carried by a rotating spider 16; the arms 17 are controlled by followers 19 engaging a fixed cam 20 so that each folder 23 in turn dwells on the fold it has formed until the next folder has begun its folding action. The shaft 15 may be connected to the driving motor via elliptical gearing and cylindrical gearing (the cylindrical gearing having a ratio of 1 : x where x is the number of pairs of arms 16) to further define the non-uniform movement of the plates 23. The plates 23 may be provided with a rotatable circular disc or a cylindrical roller, to assist in their movement across the folds, or the plates may be replaced by a cylindrical roller tapered at its ends. The folding members may be heated by known electrical means and a heated axially-moving press plate and a spacing roller may be provided. In a second configuration (Fig. 6, not shown), two coaxial horizontal shafts (27), (28) carry one-armed spiders, which in turn carry the triangular lever, as before. The non-uniform motion of the plate (23) is governed by the guide (20) and the elliptical gearing (39-44).
Patent GB-882337-A (GB)
Title: Improvements in driving mechanisms for sound reproducing apparatus
Inventor: HUMBY EDWARD THOMAS
IPC: G11B19/265
Filed: 1959-08-06
Abstract: 882,337. Securing pulleys on shafts. COLLARO Ltd. June 30, 1960 [Aug. 6, 1959], No. 26934/59. Class 80 (2). The end of a gramophone motor shaft 6 closely engages a socket in the stepped driving pulley 7 and is secured by an inclined grub-screw 20 pressing a hard steel ball 19 against the socket wall 21, which is elastically deformed into frictional engagement with the shaft. Preferably, the end of the bore against which ball 19 engages is conical, while the end of grub-screw 20 has a part-spherical recess for engaging the ball.
Patent GB-768463-A (GB)
Title: An automatic balancing arrangement for aircraft control-surfaces
IPC: B64C9/02
Filed: 1954-09-17
Abstract: 768,463. Aircraft control surfaces. GERIN, J. J. M. J. Sept. 17, 1954 [Sept. 17, 1953], No. 26955/54. Class 4. A mass balance for an aircraft control surface pivotally connected to an element of an aircraft comprises an arm integral with said surface extending into said element and arranged to remain within said element, and a balancing lever pivoted on said arm so as to have two portions of unequal length, the longer being directed forwards and carrying a mass balance, and the shorter being directed rearwards and connected to means for varying the position of said lever in response to variation in the position of the control surface, so that to each position of the surface there corresponds a position of the lever which is always within the said element. In the embodiment of Figs. 7, 8 and 11, the control surface 1 has a spar 10 secured to a part 37, Fig. 8, rotatably mounted in the airframe structure 39a, and has two forwardly extending portions 4, 4a, Fig. 11, accommodating pivots 5 of a lever 6 having at one end a balance weight 7, and at its other end a ball joint 9 working in a slot 62 in a member 60 slidable laterally on rods 61a, 61b by a link 13 attached to a casing 16 containing a ball race 17 secured to rod 18, Fig. 8. Secured to a bearing ring 36 is a toothed segment 20a engaging a pinion 22 integral with a toothed wheel 24 and mounted on a shaft 23 journalled in the airframe, so that rotation of the bearing ring 36 involves rotation of wheel 24. This wheel engages a member 26 toothed at 25 and having an internal thread engaging a thread 27 cut on shaft 18, which also has an extension 28 slotted and keyed at 29 to prevent rotation, so that rotation of wheel 24 shifts rod 18 longitudinally. A pin (not shown), but see Figs. 13 and 14, is normally spring-urged into bores 41, 42 in ring 36 and part of the airframe 39a respectively, so that ring 36 and the segment 20a remain fixed relative to the wing as the surface rotates, that is fixed relative to pinion 22, and the rod 18 is not actuated. As a result, the balancing lever 6 moves as though it were integral with the control surface. When, however, the surface has rotated through an angle α, Fig. 7, one or other of pins 48a or 48b, Fig. 11, operate on a cam surface to withdraw the pin from bore 42, so that ring 36 can rotate relatively to the wing. At the same time, a finger 35 contacts one or other of two abutments on ring 36, so as to rotate the ring with the surface. This rotates pinion 22 and wheel 24, and rod 18 is moved axially. As a result, rod 52 is raised against spring 59, to depress a plunger 56 and lock segment 20a and ring 36 to the surface. The movement of rod 18 slides the member 60, which modifies the pivotal relationship of lever 6 to the surface, so that as in Fig. 7, the counterbalance 7 remains within the wing contour as the surface is progressively deflected. In Fig. 3 (not shown), axial movement of rod 18 pivots rod 6 relatively to the surface through a bell crank device instead of member 60.
Patent GB-1162456-A (GB)
Title: Improvements in Friction Disc Elements for Wheel and Brake Assemblies.
IPC: F16D65/12
Filed: 1968-06-06
Abstract: 1,162,456. Disc brakes. BENDIX CORP. 6 June, 1968 [8 June, 1967], No. 26959/68. Heading F2E. A segmented annular disc friction eo comprises three laminations, the @ being formed of arcuate segments with dovetailed interconnection 58, 60, and the outer laminations being arcuate segments of friction material symmetrically covering the joins in the core and riveted thereto. Elongated " expansion " holes such as 62, 64 are provided in the core for the rivets. Driving key slots 74 are provided between the rivets. The discs are illustrated as used in a multiplate, aircraft wheel, brake, Fig. 1 (not shown).
Patent GB-179488-A (GB)
Title: Improvements in gas boiling and grilling devices
IPC: F24C3/08
Filed: 1921-10-12
Abstract: 179,488. Allender, J. J., and Stoves, Ltd. Oct. 12, 1921. Cooking-stoves.-A gas grilling and boiling device comprises a burner having a tubular portion f and a globular chamber q, which in position for grilling makes a comparatively close joint with an aperture d in a perforated grill-plate a ; a flame-spreading device h leaves an annular passage i for the flame and forms on its outer face a continuation of the globular chamber g. The burner is rotatably mounted in slotted bearings k, m on the plate a, and has at one end a flange o with flats p, p which rest on the plate a and retain the burner in upright position for boiling or in the 'inverted position shown. At the opposite end a cam q raises the burner during rotation to allow the spreader h to clear the opening d. The end n of the burner may be rectangular and be engaged by inclined faces on the bearing k, as shown in Fig. 4, to assist in retaining the burner in the operative positions. A second perforated plate t may be secured in front of the plate a. The device may be attached to a gasstove hot-plate by lugs c, or may be used as a separate unit.
Patent GB-171957-A (GB)
Title: Method and means of securing two iron or steel members, one of which traverses the other
IPC: B21F15/00
Filed: 1920-09-22
Abstract: 171,957. Soc. Guillot, Pelletier, Fils, et Cie. Oct. 20, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Jointing by stamping. - Longitudinal and d transverse metallic members, such as occur in vertical bar fencing where the verticals pass through the horizontal members, are secured together by forming recesses 2, 3 in the verticals and punching or pressing in the horizontals at 5 to form protuberances 6 which enter the recesses 2, 3. Where the horizontal members 4 are of channel section, the distance between the flanges is just sufficient to accommodate the verticals. The The formation of the recesses 2, 3 is dispensed with when the operations are carried out on heated metal.
Patent GB-951787-A (GB)
Title: Manufacture of sodium fluoride
IPC: C01D3/02
Filed: 1960-08-04
Abstract: Sodium fluoride free from silica is prepared by reacting an aqueous solution of hydrofluosilicic acid at 50 DEG  to 100 DEG  C. with an excess of potassium carbonate between 20% and 150% of the theoretical weight and in the presence of a quantity of water corresponding to 50 to 150 times the weight of SiO2 present, removing precipitated silicic acid, and then reacting the resulting potassium fluoride solution with sodium carbonate to obtain crystalline sodium fluoride. In examples, hydrofluorosilic acid solution from a vessel 1 (see the drawing) is reacted in a vessel 4 with potassium carbonate solution from a vessel 5, and after sufficient time has elapsed for all the silicic acid to be precipitated, the precipitate is removed on a filter 7. The filtrate is reacted in a vessel 9 with sodium carbonate solution from a vessel 10, and sodium fluoride is collected on a filter 12, with or without first evaporating some of the water in a vessel 14. The filtrate from filter 12 is <PICT:0951787/C1/1> returned to vessel 4 for re-use.  In a modification, the deposition of the silicic acid and formation of potassium fluoride may take place in a solution of potassium carbonate circulated through an absorption tower in which silicon tetrafluoride is simultaneously absorbed.  The sodium fluoride product may be reacted with aluminium fluoride to form synthetic cryolite (Na3AlF6).