baber/WOPTO huggingface dataset:
Patent GB-1129149-A (GB)
Title: Improvements in or relating to pulse generators
Inventor: SANDBANK CARL PETER
IPC: H03K3/02
Filed: 1965-10-27
Abstract: 1,129,149. Gunn effect pulse generators. STANDARD TELEPHONES & CABLES Ltd. 21 Oct., 1966 [27 Oct., 1965], No. 45459/65. Heading H3T. [Also in Division H1] Bulk instability-effect devices are provided with one or more capacitative contacts from which output pulses are obtained upon the passage of domains beneath them. Possible active materials are gallium arsenide, indium phosphide, piezo-electric semi-conductors such as cadmium sulphide, and trap-containing germanium. A suitable insulator for the deposited capacitative contacts is silicon dioxide. The devices may operate in the self-oscillation mode or may be triggered by pulses or a sinusoidal waveform superimposed on a D.C. bias applied to the ohmic electrodes. One device described has seven evenly spaced capacitative electrodes connected together so that a single input pulse will inject a group of seven pulses into the output line; a second device has two groups each of three contacts spaced along the body with the members of each group connected together so that a train of three pulses is present in each output line, there being a time delay between the groups; the third device resembles the first with the fourth and sixth contacts missing, the contacts present being connected together so that an input pulse or triggering waveform produces a pulse train coded in correspondence with the disposition of the electrodes.
Patent GB-1008698-A (GB)
Title: Steam activated catalyst
IPC: B01J29/06
Filed: 1962-12-04
Abstract: A porous catalytic composition comprises a rare earth metal aluminosilicate intimately admixed with a binder, the surface area of the composition having been reduced to the extent of at least 20% by treatment with steam.  Preferably the rare earth metal aluminosilicate has a rigid three-dimensional network characterized by uniform pores of 6-15 .  The binder is usually a clay or an inorganic oxide gel, e.g. SiO2, Al2O3 or other oxide of a metal from Group IIa, IIIb or IVa of the Periodic Table.  Before treatment with steam the catalyst may have a surface area of 100-600 sq.m./gm. Combination binders may be used, e.g. SiO2-Al2O3, SiO2-ZrO2, SiO2-MgO, SiO2-ThO2, SiO2-BeO, SiO2-TiO2, SiO2-Al2O3-ThO2, SiO2-Al2O3-ZrO2, SiO2-Al2O3-MgO, SiO2-MgO-ZrO2. Examples are given. Specification 978,261 and U.S.A. Specification 2,384,946 are referred to.
Patent GB-1325366-A (GB)
Title: Method and apparatus for advancing workpieces to a shearing device and shearing them
IPC: B23D25/10
Filed: 1970-09-25
Abstract: 1325366 Metal feeds; flying shears WEAN UNITED Inc 25 Sept 1970 [12 Nov 1969] 45806/70 Heading B3W Billets are fed to a crank-operated flying shear 16, 17 by primary grooved rollers 25, 26 which advance all but the trailing end portion of a billet to the shear and auxiliary grooved rollers 41, 42 adjacent the cutting zone which are actuated only for advancing the trailing end portion. The rollers 25, 26 are driven individually by a motor and are moved apart during operation of rollers 41, 42 by means of pistoncylinder assemblies 34, 35 through segmental gears 32, 33 to ensure equal displacement. The rollers 41, 42 are similarly motor-driven and are supported by a plate 43 which is pivotably mounted on the shear housing by means of a pin 44. The rollers 41, 42 are moved apart by piston-cylinder assemblies 45, pivoted to the plate at 44 and connected by links 46, 48 to the roller shafts (41A), (41B), Fig. 3 (not shown), which are journalled in slots in the plate 43. A piston-cylinder assembly 51 urges the roller 41 towards roller 42. A balancing piston-cylinder assembly 52 acts on the plate 43 tending to urge it downwardly about pivot pin 44 until a projection 54 engages a stop 55 on the housing but allowing the auxiliary roller unit to move upwardly when, during shearing, the blade 17 lifts the billet. In operation a signal from a length-measuring roller (64), Fig 4, (not shown), between a rolling mill and the rollers 25, 26 controls the frequency of cut, the rollers 41, 42 being inoperative, until a signal from a heat sensor (63), between the mill and the lengthmeasuring roller, at the passage of the trailing end of the billet causes the rollers 25, 26 to disengage, and the rollers 41, 42 to engage the billet, a pulse generator (61), Figs. 2 and 4 (not shown), associated with the rollers 41, 42 then controlling the frequency of cut.
Patent GB-1330314-A (GB)
Title: Furniture
IPC: A47B3/00
Filed: 1970-09-28
Abstract: 1330314 Desks; furniture frames and joints PIELKENROOD-VINITEX N V 28 Sept 1970 [2 Oct 1969] 46020/70 Headings A4H and A4U (Also in Division B4] A laboratory table etc. comprises two U-feet 1 connected by a rectangular frame 2 that supports a table top 6 and suspends cupboards, drawers etc. 11. Frame 2 comprises L-profile bars 7, 8, longitudinal bars 7 having lower horizontal flanges 9 and transverse bars 8 having upper horizontal flanges 10. The bars 7, 8 may be of U-profile. The feet 1 have a tubular U, T or H profile and flanges 9 are vertically aligned with the lower surface of the upper legs 5 of feet 1. Bars 8 may be screwed to legs 5. Bars 7 may be separate. A cupboard 11 has screwed thereto hooks 17 engaging the rear flange 9 and clamping plates 18 with bent portions (19) and rotatable by screws (20) to engage front flange 9 Fig. 5 (not shown) and possibly also lower horizontal flanges of bars 8 or legs 5. Rear bar 7 may support the lower edge of the cupboard 11. Rear plates (12), Fig.2 (not shown) may have hooks (14) at their vertical edges for engaging in holes (15) in the bridge 4 of the U-leg, and bent horizontal edges for supporting cupboard 11. The table top 6 is fixed at its sides to flanges 10 of bars 8 and/or to flanges of bars 7 or legs 5 by bent clamps 30, Fig.8. The rear edge of top 6 is secured by a peg 31, Fig. 8, screwed to top 6 and passed through bridge 4. The front edge of top 6 is prevented from warping upwards by brace 34, Fig.9, screwed to top 6 and passed through leg 5 or upright flange of bar 7, and having a bent extremity 36 abutting the leg 5 or flange 9. The table may include a rear junction box 23 for electricity, gas and water conduits. Lower legs 3 of feet 1 may have levelling cups 25. Feet 1 or box 23 may include a U-shaped flexible strap 27 Fig.7 (not shown) for anchoring to a floor bolt 29.
Patent GB-1408611-A (GB)
Title: Titanium trichloride
IPC: C01G23/02
Filed: 1972-10-06
Abstract: 1408611 Titanium trichloride polymerization catalyst SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 22 Aug 1973 [6 Oct 1972] 46222/72 Heading C3P Unsaturated hydrocarbons are polymerized in the presence of a catalyst obtained by (a) reducing TiCl 4  by gradually adding at least 0À9 molar parts of TiCl 4  to 1 molar part of a trialkylaluminium at a temperature below 220‹ K., (b) bringing the temperature to between 220‹ K. and 270‹ K., (c) adding and reducing at this temperature range more TiCl 4  and adjusting, if necessary, the total amount of dialkyl aluminium halide so as to obtain a molar ratio of TiCl 4  to dialkyl aluminium halide of from 2 : 1 to 1 : 2, and (d) subsequently raising the temperature to between 350‹ and 570‹ K. to convert the beta-TiCl 3  to gamma-TiCl 3 . The catalyst is activated by addition of further dialkyl aluminium halide. Optionally the above procedure may be modified by raising the temperature of the reaction mixture between steps (a) and (b) to above 290‹ K. and below 350‹ K. and the product of step (d) may be treated with Lewis bases such as ethers, alkanes or trialkyl aluminiums, or may be treated with sufficient propene, in liquid diluent and with heating, to produce a small amount of polymer associated with the catalyst, prior to the polymerization proper. In the examples catalysts are prepared according to the above procedures and used to prepare polypropylene and propylene-b-ethylene-co-propylene copolymer.
Patent GB-1433246-A (GB)
Title: Adaptive nonlinear control system
IPC: G05B13/00
Filed: 1973-10-04
Abstract: 1433246 Automatic control systems FOXBORO CO 4 Oct 1973 [31 Oct 1972]  46382/73 Heading G3R An automatic controller for a process having a non-linear gain function comprises means 30 for producing a signal E corresponding to the deviation of a measured variable M from a set point S, means 32 for producing an "error" signal E which is non-linearly related to the deviation signal by virtue of its having a dead-band, means 34 responsive to the "error" signal to produce a control signal for the process to reduce the deviation and means 68, 70 responsive to the frequency characteristics of the measured variable to modify the width of the dead-band of the means 32 for producing the "error" signal. In the embodiment the pH of a chemical effluent is measured at 24 and controlled by the addition of a reagent at 18. The response of the pH to a change in reagent flow (i.e. the gain function of the process) is as shown in Fig. 2b. In order that the overall control be substantially linear the element 32 has a "dead-band" (band of low gain) which ideally has a width corresponding to the portion HGB of Fig. 2b. However, HGB may change in an unpredictable way due to independent variables, causing the system to oscillate. The invention consists in varying the width of the "dead-band" according to the frequency of the pH signal variation. To do this the deviation signal E is divided into two frequency bands in discriminator 70 also Fig. 4, (not shown); this comprises respective filters whose rectified outputs are combined in opposition and supplied to a proportional plus reset stage 68 to provide a voltage which varies the conduction of transistors in element 32 Fig. 3, (not shown) connected in parallel with a portion of an input potentiometer. In operation, a slow (i.e. low frequency) deviation causes a gradual reduction in the "dead band".  This itself could cause oscillation and to prevent this the gain of the low frequency channel may be manually set at an optimum value and/or a minimum "dead band" may be ensured by a voltage derived from a potentiometer (54) and a Zener diodes in element 32.
Patent GB-988637-A (GB)
Title: Improvements in or relating to gates
IPC: E06B11/02
Filed: 1962-12-08
Abstract: 988,637. Collapsible gates. J. H. TAYLOR. Dec. 6, 1963 [Dec. 8, 1962], No. 46399/62. Headings E1J and E2A. A "weld mesh" or expanded metal semirigid gate 10 liable to sag or easily distort is tensioned to resist such sagging or distortion by a tubular member 24 pivoted on the post T by bent pins 23 and carrying two or more vertically disposed hooks 25 which hook over the free end of the gate and a handle 26 secured to the member 24 for use in turning this latter to tension the gate and thereafter to be hooked at its end 27 to the gate to secure the member 24 and its hooks 2 in the tensioning position. Another device for tensioning and holding the gate so tensioned comprises a lever and hook for tensioning and locking in the tensioning position on the over centre principle. In another embodiment the fastening and tensioning device comprises a lever pivoted intermediately on the free end bar of the gate with one end hooked into a loop on the post. Two or more vertically disposed devices may be linked together to be operated simultaneously by a single handle.
Patent GB-992594-A (GB)
Title: Parametric circuits
IPC: G11C11/44
Filed: 1961-12-28
Abstract: 992,594. Parametric amplifiers. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 28, 1961 [Dec. 30, 1960], No. 46446/61. Heading H3B. [Also in Division H1] A parametric amplifier circuit includes thin films 34, 36 of superconductive material forming a transmission line in which the two halves 26A, 26B of the line have different critical temperatures, and the circuit is operated so that only one half 26B of the line exhibits a non-linear variation of magnetic flux penetration depth with temperature, signals at first and second frequencies at which the line is resonant being coupled to the line so that the signals are in phase in the one half. Fig. 3 shows the variation of flux penetration depth, X (relative to the value # 0  at 0‹ A) with temperature T (relative to the critical temperature T c ). Changes in current or magnetic field vary T c . Over the working range 26A operates between points 30a and 30b while 26B operates between 32a and 32b. The inductance varies with flux penetration depth so 26B acts as a non-linear inductance. The necessary conditions may be realized by (1) making 26A of lead and 26B of tin; or (2) making both halves of lead but passing a D.C. biasing current through 26B; or (3) applying a magnetic field to 26B; or (4) operating the two halves at difference temperatures; or (5) making 26A of lead and 26B of tin, lowering the temperature so that both operate linearly, and inducing a circulating current through both sections. Parametric action may be controlled by inducing or quenching such a current. The circuit may also be operated with fs =2/3 fp or fs =¥ fp, and may have either open-circuited or short-circuited terminations.
Patent GB-1361089-A (GB)
Title: Silver halide photographic emulsion
IPC: G03C7/26
Filed: 1971-10-06
Abstract: 1361089 Sensitized silver halide emulsions FUJI PHOTO FILM CO Ltd 6 Oct 1971 [7 Oct 1970] 46531/71 Heading G2C A silver halide photographic emulsion comprising grains at least 95% by number of which are not greater than 0À2 micron in diameter or whose mean grain diameter is not more than 0À18 micron, and at least one hemicyanine dye having one of the general formulae (I) or (II) in which Z completes an optionally substituted heterocyclic nucleus comprising five or six atoms in the heterocyclic ring containing the nitrogen atom shown, R represents optionally substituted alkyl (1-5C), A is H, B is aryl e.g. phenyl or tolyl or A and B together form a ring, L is methine, R and the L connected to the heterocyclic ring optionally being connected by a polymethylene chain X is an anion, m is 1, 2 or 3 and n and p are 0 or 1.
Patent GB-1298036-A (GB)
Title: Improvements in apparatus for applying foil caps or covers to containers
IPC: B65B7/28
Filed: 1970-10-01
Abstract: 1298036 Packaging; feeding closures; closing containers DUCKWORTH COLUNIO Ltd 29 Sept 1971 [1 Oct 1970] 46636/70 Headings B8C B8S and B8T A machine for applying foil caps or covers B to lines of containers C<SP>1</SP> comprises a shoot D which receives the caps B from a forming press A and is pivoted to swing across the lines to deposit caps in a cap applicator D<SP>2</SP> positioned above each line. While the bottom cap in an applicator D<SP>2</SP> is being held vertically in a slot in a holder plate it is engaged by a moving container and falls on top thereof. An adjustable plate presses the cap over the lip of the container. The caps may pass directly or along a conveyer from the press A to the shoot.
Patent GB-1386893-A (GB)
Title: Reversing gear
IPC: B41J33/51
Filed: 1972-10-11
Abstract: 1386893 Reverse gear ENGLISH NUMBERING MACHINES Ltd 11 Oct 1973 [11 Oct 1972] 46787/72 Heading F2D [Also in Division B6] Reverse gear, for driving selectively in opposite directions according to the direction of rotation of a driving motor M, two output shafts 1, 2, connected e.g. to the ribbon spools of a printing machine or typewriter, comprises a worm 6 driven by the motor M through a meshing wheel pair 4, 5, and meshing a worm 10 which is urged in one or other axial direction, according to the direction of the input torque, to engage dog clutch teeth 12, 13 on its ends sellectively with complementary teeth 14, 15 on the respective output shafts 1, 2, and the worm 6 is carried in a frame 8 pivoted about an axis 9, which may or may not pass through the mesh point of the gears 4, 5, and loaded towards engagement of the worm gear 6, 10 by a spring 19 which yields to excessive drive resistance to permit the worm teeth to ride over and thus prevent overload on the motor M. The motor is reversed automatically to change over and reverse the drive to the respective output shafts 1, 2 when a ribbon spool is empty.
Patent GB-468790-A (GB)
Abstract: 468,790. Current and pressure meters. ELLIOTT BROS. (LONDON), Ltd., and HARBEN, D. C. Jan. 11, 1936, No. 1012. [Class 37] A moving-coil instrument of the type in which a permanent magnet has an annular soft iron polepiece embraced by a bifurcated polepiece, and in which the coil is located on the annular pole with its top and bottom edges moving in the air gap, has a flat cast block 3 forming the permanent magnet which is supported by a phosphor bronze base 1 upon which is erected a pair of mild steel or soft iron plates 5 carrying the annular polepiece 10a and the bifurcated polepiece 11. The magnet is supported by bolts 9 located in channels in the edges of the magnet 3 and passing through the plates 5 which are also secured by bolts 7 engaging elongated holes in the base 1. The moving coil 12 is carried on a spindle passing through the aligned apertures in the polepieces and moves in the airgap as shown. A shunt located just above the magnet 3 comprises a pair of strips 18 secured .by bolts 19, and the shunt is adjustable by set-screws 20.
Patent GB-1307650-A (GB)
Title: Sintered alloy having wear resistance at high temperature
IPC: C22C1/04
Filed: 1971-10-08
Abstract: 1307650 Copper base sintered alloy TOYOTO JIDOSHA KOGYO K K 8 Oct 1971 [26 April 1971] 47004/71 Heading C7A A copper base sintered alloy contains:- Cu and inicidental imputities the balance It may be used in valve seats for internal combustion engine.
Patent GB-1496979-A (GB)
Title: Airline lubricators
IPC: F16N7/34
Filed: 1975-11-18
Abstract: 1496979 Airline lubricators PARKERHANNIFIN CORP 18 Nov 1975 47457/75 Heading F2A [Also in Division B1] An airline lubricator incorporates an atomizng nozzle assembly which is radially spaced from the wall of a main passage in a housing between inlet and outlet, and which is axially located by first and second abutment faces which are, respectively, engaged with a first housing wall and spaced from a second housing wall by a yieldable member compressed between the second wall and second face. A portion of the pressured air admitted at 16 (Fig. 2) passes into bore 17, deflects elastomeric disc 54, and passes via chambers 18 and 28 to outlet 20. A further portion of air passes through slot 62 and via conical chamber 74 (Fig. 5) and venturi throat 60 into passage 46 and bowl 10. The pressurization of 10 by air from 46 and 39, together with low pressure produced at bore 78 by passage of air through the venturi causes oil to move upwards in submerged pick-up tube 92 (Fig. 3) past valve seat 90 and needle-valve 98, via port 101, passage 99, hole 102, groove 103, holes 117 and slot 119 into inner dome 114, from whence it passes through bores 67, 77 and 78 to be atomized at 60. Atomized oil is carried through 46 to channel 30 in deflector 31, and also through passage 45, into passage 39 to be diluted and carried to exit 20 by air passing through bore 17. The oil droplets emitted from 20 are 0À5-3 microns and amount to 3% of the oil passing through nozzle 60. Slot 44 enables larger droplets deposited in 28 to drain into bowl 10. In another embodiment (not shown), atomized oil is not recirculated to bowl 10, but is passed directly from the venturi throat to the outlet through a transverse passage.
Patent GB-1198385-A (GB)
Title: Apparatus for Controlling the Rotation of a Gas-Turbine-Driven Rotating Spindle
IPC: F01D25/22
Filed: 1968-10-07
Abstract: 1,198,385. Bearings. TOYODA MACHINE WORKS Ltd. 7 Oct., 1968 [9 Oct., 19671, No. 47529/68. Heading F2A. [Also in Division F1] An apparatus for controlling the rotation of a spindle 1 driven by a gas-turbine 4 and mounted in gas bearings 2, 3 comprises means 21 for supplying gas from a gas source 20 to the bearings and means for supplying gas from the source to the turbine via a throttle 33, 34, the throttle being variable from an equilibrium position in response to a fluctuation in the difference between the pressure P1 of gas supplied to the bearings, and the pressure P2 of gas leaving the throttle. The throttle may be operated by a mechanism comprising two diaphragms 31, 32, which respond to the pressure of gas supplied through lines 51, 53, and act against a spring 35. The equilibrium position may be adjusted by means of a screw (39) (Fig. 4, not shown). In a further embodiment (Fig. 5, not shown), gas supplied to the turbine is additionally controlled by a valve (45) connected to a speed-detecting turbine (7) secured to the shaft; if the shaft rotates faster, the pressure (P3) is correspondingly reduced.
Patent GB-1286120-A (GB)
Title: An improved timepiece casing
Inventor: PIQUEREZ ERVIN
IPC: G04B37/18
Filed: 1969-09-29
Abstract: 1286120 Clocks and watches E PIQUEREZ 29 Sept 1969 [27 Sept 1968] 47827/69 Heading G3T A timepiece casing has a member, e.g. a middle bezel 1, resiliently connected to a surrounding protective screen member 2 by an elastic ring 3, e.g. of rubber, mounted in grooves 1a, 2a in the members 1, 2. The screen 2 is preferably of a scratch-resistant material such as tungsten carbide. The middle bezel 1 may be formed integrally with the back plate of the casing. In an alternative embodiment an elastic shock absorbing ring 11, Fig. 3 (not shown) is interposed between a shoulder on the front edge of the middle bezel 1 and an overlying part of the screen 2.
Patent GB-1157739-A (GB)
Title: Photocopy Machine
Inventor: NICHOLS GORDON WEBB
IPC: G03B27/80
Filed: 1967-10-20
Abstract: 1,157,739. Photo-copier. GENERAL ANILINE & FILM CORP. Oct.20, 1967 [Oct. 21, 1966], No.47874/67. Heading G2A. In a photo-copy machine, the speed of the driving electric motor, and hence the exposure time, is controlled photo-electrically, the light input to the photo-cell depending on the brightness of the exposure lamp and on the transmissivity of the original being copied. As shown in Fig. 1 an original 20 and copy paper 31 are fed by belt 36 over a glass drum 13 having a mercury lamp 14 along its axis and light is reflected by a mirror 41 through the original 20 to a photo-cell 40 whose output controls via a circuit Fig.2A (not shown) the motor M driving belt 36. The cell output is fed via zero response and contrast resistors (46, 47, Fig. 2A not shown) to a transistor amplifier (48) and thence via an idling speed adjusting resistor (49) to a silicon controlled rectifier (50) and to the motor M. A switch 45, tripped by the leading edge of the original shorts resistor (49) during exposure, and a capacitor (55) is charged, to be discharged through resistor (49) after exposure, thus ensuring a gradual return to the idling speed. In a second embodiment of the control circuit Fig. 2B (not shown) switch 45 is replaced by a double throw switch (65), and a diode (53) prevents discharge of the capacitor (55) through the source. In a third embodiment of the control circuit Fig. 3 (not shown) the idle speed is adjusted independently of the contrast. The copier may include means for cutting the copy paper.