baber/WOPTO huggingface dataset:
Patent GB-441341-A (GB)
Title: Improvements relating to apparatus for the production of oscillations by means of electric discharge valves
IPC: H01J19/02
Filed: 1934-07-17
Abstract: 441,341. Thermionic valves. HAUSSER, F. 1., 24, Blumenthalstrasse, Heidelberg, Germany. July 17, 1934, No. 20921. Convention date, July 17, 1933. [Classes 39 (i) and 40 (v)] In a brake-field oscillation generator in which there is arranged between the cathode and the positive grid, a negatively-biassed grid screening the positive grid from electrons passing from the cathode, the circuit determining the oscillations being connected between the positive grid and the cathode, means are provided whereby oscillations are applied to the negative grid in phase with those on the positive grid. The stream of electrons through the grid openings increases strongly in the positive phase and decreases strongly in the negative phase. As shown, the negative grid G<1> consists of trough-shaped members of semicircular, U -or V-cross-section, arranged with the open side turned towards the bars or wires of the positive grid G<2>, the cathode filaments K being mounted in front of or in the gaps between the trough-shaped members G<1>; the brake electrode consists of a flat plate A. The oscillation circuits consist of pairs of parallel conductors L<1>, L<2> bridged by condensers C.Bl, the conductors L<1> being connected between the grid G<1> and the cathode, and the conductors L<2> between the grid G<2> and the cathode, so that the two circuits are coupled through the internal capacity of the valve between the grid G<1> and the cathode, and the alternating potentials on the grids are in phase. In a modification, (Fig. 2, not shown), the electrodes are arranged concentrically. The Specification as open to inspection under Sect. 91, comprises also an arrangement in which one pair of parallel conductors is connected with the brake electrode and the positive grid, and the other pair with the brake electrode and the negative grid. This subjectmatter does not appear in the Specification as accepted.
Patent GB-202648-A (GB)
Title: Thermostatic switch
IPC: H05B1/02
Filed: 1923-08-17
Abstract: 202,648. Svensson, I. V. Aug. 18, 1922. [Convention date]. Void [Published under Sect. 91 of the Act]. Thermal cut-outs for use with electric irons &c. which are mounted within the socket member 1 of a plug coupling, have a fixed contact 11 connected to one of the pockets 12 which co-operates with a movable contact 10 attached to a metal block 9. The block 9 is mounted on a shaft 7, a thin layer of solder 8 being run in between the two members, Fig. 5. The shaft 7 is rotatably mounted within the porcelain body 1 and bears at one end against a metal strip 6 attached to an incoming lead 5. The other end of the rod 7 has an external operating 14 which carries a spring pawl 7 engaging one of a number of recesses 16 in the cover 17, Fig. 1, to hold the shaft in its adjusted position. A spring 13 is secured between a fixed point and a depending arm of the contact 10, and when the iron &c. reaches a predetermined temperature, the conducted heat melts the solder 8 and allowing the spring 13 to move the arm 10 to the dotted position, Fig. 2, in which the heating circuit is interrupted at 10, 11. When the solder 8 has solidified the cut-out may be re-set by rotating the handle 14, the shaft 7 carrying with it the block 9 and contact 10. In a modified form the layer 8 of fusible material is dispensed with, the member 9 fitting friction tight on the shaft 7 and being composed of material of higher coefficient of expansion than the shaft so that on heating the greater expansion of the outer member enables it to be rotated by the spring 13 to interrupt the heating circuit. In a further modification a rectilinearly movable contact member may be employed.
Patent GB-917703-A (GB)
Title: Improvements in brakes and clutches
Inventor: DOWELL FREDERICK SIDNEY
IPC: F16D55/22
Filed: 1958-07-01
Abstract: 917,703. Friction clutches. DUNLOP RUBBER CO. Ltd. June 18, 1959 [July 1, 1958], No. 20965/58. Class 80 (2). [Also in Group XXXIV] In a clutch assembly comprising one or more friction members for engagement with a rotatable member, a springy metallic plate or strip 11 is bowed between opposite ends into an arcuate shape and disposed to exert a force substantially in the direction of a chord joining the ends of the plate or strip to effect engagement of the clutch and means (e.g. fluid pressure means 8, 9 (Fig. 1)) is provided to compress the plate or strip in the direction of the chord to effect disengagement of the clutch. In the " fail-safe " disc brake for mineshaft winding gear illustrated, friction pads 5 secured to backing-plates 6 are located in guides 4 in a non-rotatable housing 3 and are normally applied by laminated spring metal struts 11 arranged in arcuate form and engaged in recesses 12, 13 in the base of the cylinder and pad backing-plate 6, respectively. To release the brake the cylinder 9 is pressurized and the piston 8 is moved to the left to release the brake. The laminated spring-metal struts 11 are loaded in compression and act as Euler struts such that the end loading exerted by the struts is substantially constant irrespective of wear of the friction pads.
Patent GB-682283-A (GB)
Title: Improvements relating to two-way lever-operated electric switches
IPC: H01H23/16
Filed: 1950-08-25
Abstract: 682,283. Tumbler switches. PARSONS, Ltd., C. H., and HANDLEY, G. B. Aug. 23,1951 [Aug. 25, 1950], No. 21020/50. Class 38 (v) A two-way, lever-operated switch, suitable for alternating current circuits, comprises a guided bar 30, the ends of which actuate movable contacts 12 which are normally urged into engagement with fixed contacts 24, the lever 18 bearing on the bar 30 so that during the movement of the lever, one set of contacts is separated slowly and the other set rapidly. The bar 30 is guided in a slot 29 in an insulating block 13 mounted on the base 10, and has a cut-away part 20 pressed against a roller 32 on the end of lever 18 by a spring 34. The contacts 12 are carried by insulating members 39 supported on pins passing through the block 13 and are urged upwards by springs 38. On moving the lever from one limit position to the other the spring 34 and one spring 38 initially oppose separation of the corresponding set of contacts, thereby producing a slow break. After passing the central position shown, the spring 34 and the other, spring 38 assist closure of the other set of contacts, which thereby close rapidly. Rubber bushes 42 on the lever 18 engage a surface 40 on the block 13 and abut the walls 41 to define the limit positions. According to the Provisional Specification, the surface 20 of bar 30 has differently-inclined ridges to produce the desired effect.
Patent GB-819132-A (GB)
Title: Improvements in or relating to pipe joints
IPC: F16L27/10
Filed: 1954-07-19
Abstract: 819,132. Pipe joints. MORGAN, C. F. Oct. 14, 1955 [July 19, 1954], No. 21037/54. Class 99(1). Pipes 10, 11 are provided with collars 12, 13 respectively, secured as by grub screws or by expanding the pipes, and annular cone-like members 17, 18 positioned one on each pipe enclose a rubber washer 16 placed between the collars, means being provided for forcing the members 17, 18 together to compress the washer while restraining it from radial outward movement, and to draw the pipes into close abutting contact with one another. As shown in Fig. 1, the inner sides of the collars 12, 13 are inclined to provide a dovetailed space into which the washer is squeezed, the washer being of T- section and having a base wider than the inner width of the space when the pipes are butted together, the member 18 has a stepped bore 19 to allow overlap with the member 17, and the members 17, 18 are forced together by tightening bolts 23 passing through flanged members 21, 22 fitted loosely on the pipes. The members 21, 22 may be dispensed with, flanges being provided on the cone-like members to receive bolts, or, as shown in Fig. 3, the member 22 is dispensed with, and a ring 30 mounted on the pipe 10 fits over the back of the member 17 and has slotted lugs 32 to receive screw-threaded rods 35 hinged to lugs 34 on the member 18, the members 17, 18 being drawn together by tightening nuts 37. The clamping means may also take the form of toggles, compression springs may be used to force the members 17, 18 together, or these members may have inter-engaging screw threads.
Patent GB-137501-A (GB)
Title: Improved means for clamping two relatively sliding members
IPC: B23B21/00
Filed: 1919-08-28
Abstract: 137,501. Shoot, A., and Jiguloff, A. Aug. 28, 1919. No Patent granted (Sealing fee not paid). Turning.-One member b of two relatively sliding members which may constitute a lathe slide-rest, is formed with a spring jaw b<1> and with a slot to receive a projection a<1> on the other member. After adjustment, the two members are clamped by a screw c which presses the spring portion against the projection a<1>. Reference has been directed by the Comptroller to Specification 144,020.
Patent GB-300531-A (GB)
Title: Improvements in and relating to structural roofing and like materials
IPC: D06N5/00
Filed: 1927-08-11
Abstract: 300,531. Shaw, R., and Wailes Dove Bitumastic, Ltd. Aug. 11, 1927. Compound sheet materials.-Roofing, sheeting and like material comprises bituminous, resinous or other waterproof material applied to canvas, felt or other fabric so that the fabric is coated or impregnated therewith, with a rigid or stiff reinforcement comprising interwoven wires or like members, expanded metal or other perforated sheet material of sufficient rigidity to render the sheets self-supporting, enclosed within the waterproof fabric by being interposed between two layers thereof, the said layers and the reinforcement being subjected to heat and pressure to unite them. The sheets may be cut to smaller dimensions, and may be plane, or may be passed through rollers to produce sheets of corrugated, shingle-shaped or other form. According to the Provisional Specification, the waterprooof material may be vulcanized or treated with sulphur chloride, and mineral or other matter may be incorporated therein. Reference has been directed by the Comptroller to Specifications 3742/87, [Class 142, Weaving &c.], 16399/95, and 1360/12.
Patent GB-914356-A (GB)
Title: Improvements in or relating to optical projectors
IPC: E05B75/00
Filed: 1959-06-19
Abstract: 914,356. Optical projectors. INTERAGENT ESTABLISHMENT. June 19, 1959 [June 15, 1958], No. 21202/59. Class 97 (1). An optical projector is provided with at least three duets, for guiding cooling air therethrough, these ducts terminating in a single main duct in the region of the projection lamp. The invention is shown as applied to the portable projector which is held by means of a piston grip. This projector comprises a tubular chassis 1 on which are mounted a collar 3 for focusing the projection lens 7 within the chassis, a casing 4, a cap 5 which can be removed to allow access to the projection lamp 18, and removable end caps 2 and 6. Within the chassis there is provided the lens system 7, a chamber 8 in which a slide holder 10 is held by securing means 9, mountings 16 housing three condenser lenses 17, a lamp 18 which is mounted in a stud 19 on a holder 20, a reflector 21 and a blower 25. The lamp 18 is connected to a switch in the grip 24, this switch being operated by finger pressure on an actuator 36. In this projector the first air duct is formed by the space between the inner face of the chassis 1 and the outer surface of the condenser mountings 16, these condenser mountings having openings 54, 55 and 56 so that the duct is defined by four sectors of a circle. Transverse air currents are provided by openings 27 in the condenser mountings and by throttle plates 28 which result in a pressure difference. This air duct opens out into the main air duct in the region of the lamp 18. The second air duct is confined between the inner surface of the removable cap 5 and the outer surface of the tubular chassis 1, the air being let in through slots 31 in the cap 5. A rib 32 on the inner face of the cap 5 causes the air current to be split up for better cooling to the tubular chassis 1, which has an opening 33 above the lamp 18 so that by removing the cap 5 the lamp 18 may be changed. Ribs 35 on the outside of the tubular chassis 1 serve for better heat transfer of the cooling air. The third air duct is formed in the piston grip for holding and operating the projector, this air duct being an annular passage defined by the inner face of the grip and the outer face of the switch 39, the distributer 40 and the lamp holder 20. Air enters this third duct through the gap 31 between the lead socket 42 and the opening therein which contains the block pins 34. This duct opens out into the main duet at 45 and the air moves across the lower part of the lamp bulb. Other ducts are provided for the entry of additional air into the main duct. The cooling air from three ducts, after it has passed into the main duct is sucked up by the rotor 47 of the blower 25 and conveyed to the outside through discharge baffles 26.
Patent GB-1063971-A (GB)
Title: Method and apparatus for making a continuous product and control device therefor
IPC: B29C48/92
Filed: 1965-05-19
Abstract: 1,063,971. Fluid-pressure servomotor systems; automatic thickness control. E. I. DU PONT DE NEMOURS & CO. May 19, 1965 [May 20, 1964], No. 21252/65. Headings G3P and G3R. Apparatus for controlling the formation of a web of material, which is obtained by the extrusion of a molten polymer on to a cooled casting wheel 11 whereby repetitive variations in the thickness would be produced due to the inaccuracies in the wheel comprises a sensing device 14 which measures the web thickness at a point a distance from the wheel equal to a number of times, preferably small, the circumference of the wheel and provides a signal fed to an integral controller 17, Fig. 2. The controller provides an output to activate servomotor 41 to control the speed of the wheel and such signals are produced for each signal of the wheel, which is divided into approximately 32 segments. Pneumatic volumes 37 provide a memory unit which stores the signal previously fed to the servomotor for each segment and is released by micro-switches 39 actuated by a cam 20 to modify the output signal of controller 17 by supplying the previous signal fed to control the operating segment when in its previous operating position, i. e. opposite the hopper 12. Devices 30, 31 measure the highest and lowest of the stored signals and provide an output at 34 which is the average of the stored signals. This signal is fed through an inverse differential relay 35 and integrated by the action of a relay 36 to adjust the average with reference to a reference signal representing the mid-point of servomotor 41, the resulting signal being then fed to the controller 17 as a reference signal. The output of controller 17 passes through a restrictor 21 and relay 32 to servomotor and also provides a feedback to the controller. In an electrical control system, Fig. 4, the thickness is measured pneumatically or electrically and an electrical signal is fed to a summer 46. The output of the summer 46 is fed through an amplifier 47 to an integrator and memory storer 49 which includes thirty two capacitors corresponding to segments of the casting wheel 11. Each capacitor stores the prior computed signal for its segment. The output of this circuit is the previously stored signal for the segment which is compared at 50 with the position of the pneumatic motor 41 which adjusts the speed of the drum, the difference, if any, between these signals being fed through a chopper amplifier 51 to actuate a motor 52 which controls the valve 53 of motor 41. The signal output is fed to a set point circuit 55 which averages the lowest and highest voltage in the circuits corresponding to the segments and thus provides a signal representing the average of these values which is fed to an amplifier 57 and a proportional-integral controller 58, 59 the output being fed to the summing point 46.
Patent GB-1341599-A (GB)
Title: Colour encoding camera
Inventor: DISCHERT R A
IPC: H04N9/07
Filed: 1971-04-19
Abstract: 1341599 Colour television RCA CORPORATION 19 April 1971 [11 Feb 1970] 21354/71 Heading H4F A filter assembly 14 is placed in front of a vidicon camera tube 16, or a black and white film for subsequent scanning, the filter assembly 14 comprising two superimposed gratings, one of which has vertical stripes, alternately cyan and transparent, and the other of which has oblique stripes, alternately yellow and transparent. The widths of the stripes and the angle of inclination of the oblique stripes are such that the output of camera tube 16, when the resulting image is scanned, contains two carrier waves at the same frequency, one due to each grating. The angle of inclination of the oblique stripes may be such that a phase change of 180 degrees occurs in the respective carrier wave between successive scanning lines in which case the circuit shown in Fig. 1 may be used to separate the carriers, a red-representative carrier (due to the cyan-transparent stripes) being produced from adder 21 and a bluerepresentative carrier (due to the yellow-transparent stripes) being produced from adder 26. To produce directly a green-representative carrier a magenta-transparent striped grating may be included in filter assembly 14, the magenta-transparent and yellow-transparent gratings having equal stripe widths and being disposed at equal and opposite angles to the vertical, such that scanning of either produces a 120 degree phase change between succeeding lines. The red, green and blue-representative signals may then be separated using two oneline delay lines, a 120 degree phase shifter, two 240 degree phase shifters, and three signal adders (Fig. 3, not shown). Filter assembly 14 may be inside or outside the camera tube 16 and may be connected to the tube by a fibre optics faceplate.
Patent GB-1000901-A (GB)
Title: Catalytic hydrocarbon conversion
IPC: B01J29/70
Filed: 1961-07-10
Abstract: A cracking catalyst comprises a finely-divided crystalline aluminosilicate having a structure of rigid three-dimensional networks characterized by uniform pores, suspended in and distributed throughout a porous matrix, which composition has a sodium content of less than 1%.  Such a catalyst may be prepared by intimately admixing a finely-divided substantially sodium-free crystalline aluminosilicate having a structure of rigid three-dimensional networks characterized by uniform pores and an inorganic oxide gel under conditions such that the aluminosilicate is distributed throughout and held suspended in a porous matrix of the gel, washing the resultant material free of water-soluble matter, drying and thereafter thermally activating the resulting product by heating at a temperature in the approximate range of 500-1500 DEG  F.  The matrix is preferably SiO2, SiO2.Al2O3 or a siliceous gel, if desired with at least one oxide of a Group IIA, IIB or IVA metal.  Reduction of sodium content to less than 1% may be effected by ion-exchange using Mn++, Cr+++, V+++, Ca++, Mg++, Al+++, a R.E. ion or NH4+.  The finished catalyst may have a surface area of 100-700 sq.m./gm. Examples are given.ALSO:A cracking catalyst comprises a finely divided crystalline aluminosilicate having a structure of rigid three dimensional networks characterized by uniform pores, suspended in and distributed throughout a porous matrix, which composition has a sodium content of less than 1%.  Such a catalyst may be prepared by intimately admixing a finely divided substantially sodium-free crystalline aluminosilicate having a structure of rigid three dimensional networks characterized by uniform pores and an inorganic oxide gel under conditions such that the aluminosilicate is distributed throughout and held suspended in a porous matrix of the gel, washing the resultant material free of water-soluble matter, drying and thereafter thermally activating the resulting product by heating at a temperature in the approximate range of 500-1500 DEG F. The matrix is preferably SiO2, SiO2-Al2O3 or a siliceous gel if desired with at least one oxide of a Group IIa, IIIb or IVa metal. Reduction of sodium content to less than 1% may be effected by ion exchange using Mn++ Cr+++, V+++, Ca++, Mg++, Al+++, a R.E. ion or NH4+.  The finished catalyst may have a surface area of 100-700 sq.m./gm.  Examples are given.
Patent GB-434991-A (GB)
Title: Improvements in and relating to the production of alkali perborates
IPC: C01B15/12
Filed: 1934-07-21
Abstract: Alkali perborates are obtained by acting on boric acid or borates with hydrogen peroxide or equivalent peroxidized compounds in aqueous medium in the presence of a small quantity of one or more soluble salts of the alkaline-earth metals, magnesium, or zinc.  In examples, the preparation of sodium perborate from sodium metaborate and hydrogen peroxide and from sodium peroxide and solid boric acid in the presence respectively of magnesium sulphate and zinc sulphate is described.
Patent GB-475342-A (GB)
Title: Improvements in apparatus for carrying out reactions with catalytically active metal wire gauze
IPC: B01J35/06
Filed: 1937-08-03
Abstract: <PICT:0475342/III/1> <PICT:0475342/III/2> For effecting reactions with catalytically active wire gauze arrange transversely to the flow of reactants, the gauze is supported on one or both sides by wires or other supports which are kept stretched by automatically acting devices such as springs or weights.  Figs. 2 and 3 show devices, actuated by spring and weights respectively, applied to the end of the supporting wire A which projects through the wall of the reaction chamber.  In another embodiment a simple helical spring surrounding the wire is used.
Patent GB-1386307-A (GB)
Title: Winding drum assembly
IPC: B66D5/10
Filed: 1972-05-08
Abstract: 1386307 Winches A BRUSSELLE 8 May 1972 [6 May 1971] 21429/72 Heading B8B [Also in Division F2] A winding assembly comprises a freely rotatable winding drum having an annular rim 7 extending therefrom, a brake band 8, 9 frictionally engageable with the outside of the rim 7 and a clutch band 20, 21 frictionally engageable with the inside of the rim 7 to transmit drive to the drum from a power driven shaft 3 on which the drum is mounted. The brake band 8, 9 is anchored at one end 16 through a link 17 to a base 2 and has its other end 12 movable by a fluid operated ram 13 to engage and release the brake. The clutch band 20, 21 is anchored at one end 24 to an arm 25 rotatable with the drive shaft 3 and the other end 27 is coupled to the arm 25 through a fluid operated ram 31 for engagement and disengagement of the clutch. The leading ends 12 and 27 of the brake and clutch bands are arranged such that when the braked drum is to be coupled for anticlockwise drive, engagement of the clutch band with the rim causes a self engaging action of the leading end 27 on the rim 7 and a self releasing action of the leading end 12 of the brake band, whereupon slip occurs between the rim 7 and brake band until the brake band is released. When the braked drum is to be coupled for clockwise drive, the slip occurs due to the self releasing action of the leading edge 27 of the clutch band, until the brake is released. In another embodiment the fluid rams are supplemented by or replaced by spring arrangements.