baber/WOPTO huggingface dataset:
Patent GB-1506678-A (GB)
Title: Discharge lamp and an arrangement including such a lamp
IPC: H01J61/24
Filed: 1976-03-29
Abstract: 1506678 Control systems for gas discharge lamps PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 29 March 1976 [1 April 1975] 12467/76 Heading H2H [Also in Divisions H1 and G3] In a metal vapour discharge lamp having at one end of the elongate envelope 3 two electrodes 4 and 5 located in respective tube branches, a further electrode 6 at the other end of the envelope, and a reservoir 7 for the vapour metal located in the electrode 4 tube branch, the vapour pressure is maintained substantially constant by the action of the switch 10, controlled by the voltage drop produced by the passage of the lamp current through the resistor 8 such that it switches the supply from electrode 5 to electrode 4-to raise the temperature of the reservoir 7-when the lamp current drops below a first value, and switches it from electrode 4 to electrode 5 when it exceeds a second value. In a further arrangement (Fig. 3, not shown) the lamp terminates similarly at both ends of the envelope which are provided with similar circuitry, switching at the two ends being effected simultaneously. The introduction of diodes into the Fig. 1 circuit permit A.C. supply (Figs. 2 and 3, not shown) or the switch and one of the diodes may be replaced by thyristors. Mercury, and low pressure sodium, lamps are referred to.
Patent GB-331022-A (GB)
Title: Improvements in or relating to thermionic-valve arrangements
IPC: H03D1/16
Filed: 1929-04-22
Abstract: 331,022. Dicker, S. G. S., (Naamlooze Vennootschap Philips Gloeilampenfabrieken). April 32, 1929. Thermionic detectors.-To improve the efficiency of grid-leak rectification, a resistance R2, greater than the internal resistance of the valve, is inserted in series with the primary winding of the coupling-transformer T1 so that the straight-line portion of the characteristic curve is enlarged. The resistance R2 may be replaced by an aperiodic impedance; or the transformer primary may be wound of high-resistance wire; or a choke coil may be inserted in series with the secondary winding of the transformer.
Patent GB-695774-A (GB)
Title: Improvements in or relating to seating structures
IPC: E04H3/12
Filed: 1952-05-16
Abstract: 695,774. Circus &c. seating structures. LEWIS, P. B. May 16, 1952, No. 12496/52. Class 20(i) . A raked seating structure for circuses &c. comprises steel stringers 1 detachablyseated (in speed relation) on trestles &c. of varying height, end seat supports 9a, b,. alternating with floor supports 10, permanently fixed to each stringer and seat sections 11 with tongues at their ends which pass throught slots 13 in the end supports and are engaged therein by a ring or loop so as to lock the abutting ends of two seat sections to the support. Unit lengths of the stringers which are of channel section are joined by hardwood blocks inserted into their abutting ends and bolted thereto. Wedge-shaped blocks are secured to the underside of the stringers for reception in sockets at the upper end of the trestles which are also preferably stayed to the strips. Floor sections 15 are locked to their end supports 10 in the same way as the seats. Detachable backrests 16 are supported by uprights 9c integral with the seat supports. In a prepared form a blade spring is mounted at the end of each backrest, adjacent pairs being received in a recess in a wooden filler strip 17 in the upright and a pair of bolts projecting from each backrest enter slots 21 in the web of the upright. A gangway may be provided by omitting a block of seat sections a handrail preferably being secured to the exposed end supports.
Patent GB-1303451-A (GB)
IPC: A46D3/08
Filed: 1970-03-16
Abstract: 1303451 Brush making machines GB BOUCHERIE 16 March 1970 [27 Nov 1969] 12527/70 Heading A4K In a brush making machine in which the needle is driven towards the brush stock at a greater speed than the slide in which the needle is guided and the slide and needle have independent drives, damage to the slide drive means when the slide is pulled along with the needle due to staples fibres etc. being wedged between the slide and the needle is prevented by a resilient safety device which may also be used to stop the machine or operate a warning signal. In a first embodiment Fig.2 the slide drive includes a lever 7 pivotally connected at one end to an end piece 26 and being provided at the other end with a roller (10) guided in a groove (11) in a cam (12) Fig.1, (not shown), the end piece 26 being connected to one end of a rod 31 slidably secured in a housing 32 to which the slide 1 is pivotally secured, a compression spring 37 being provided between a collar 34 on the rod 31 and a plug 36 in one end of the housing the slide 1 being displaced towards the brush body when the housing is pulled upon by the lever 7 via the end-piece 26, the rod 31 and collar 34. If the slide is pulled along with the needle the housing will be displaced towards the end piece and when a predetermined pressure is reached the spring 37 will be compressed without causing breakage or distortion of any of the parts. Movement of the housing brings a contact 40 of a microswitch 39 into contact with an adjusting screw 28 so that a warning signal can be operated or the machine stopped. In a second embodiment Fig. 6 lever 7 is provided with an extension 42 connected via a pivot 6 and rod (not shown), to the slide 1 and two parallel levers 48, 49 which are parallel to the extension 42, the two levers 48, 49 have extending therebetween a spring biased lever 54 provided with a stop 63 which co-operates with one of two limit contacts (61), (62) Fig.4 and 5, (not shown), on the extension 42 when force is applied to lever 7 and extension 42 when the slide is pulled along with the needle. In a third embodiment Fig.8, the resilient safety device 71 is provided between the two levers (7) and (68) Fig.7, (not shown), of a double cam slide drive. The safety device 71 comprises an end member 72 pivotally connected to lever (68) and a housing 77 carrying a sliding part 78 pivotally connected to lever 7, a spring 84 which is compressed when excess pressure is applied to the slide being housed in an extension 81 of the housing 77. In a fourth embodiment Figs. 10-12, (not shown), a single cam is used and contact between the cam and follower roller is provided by a pull-spring, pneumatic cylinder or cup springs, the roller leaving the cam when an excess force is applied to the slide.
Patent GB-130469-A (GB)
Title: A Plate for Protecting Animals' Feet.
Inventor: BOWEN SAMUEL
IPC: A61D9/00
Filed: 1918-08-01
Abstract: 130,469. Bowen, S. Aug. 1, 1918. Sole-plates; over-reaching, preventing.-A sole-plate a adapted to fit within an ordinary shoe is formed with an upwardly and forwardly bent tongue c to slip between the hoof and the shoe at the toe part, and with depressed and laterally projecting lugs d fitting the underside of the shoe at or near the heel portions and secured thereto by headed screws or cogs e. The plate may also be formed with a curved guard extension f to shield the portion of the foot liable to be struck if the animal overreaches.
Patent GB-973907-A (GB)
Title: Polymerisation process
Inventor: WEBBER WILLIAM CYRIL
IPC: C08F10/00
Filed: 1962-04-02
Abstract: 4-Methylpentene-1 is polymerized at a pressure of at least 2,000 psig. using a catalyst such as ditertiary butyl peroxide, tertiary butyl hydroperoxide, dicumyl peroxide, diethyl peroxide, lauroyl peroxide, benzoyl peroxide, hydrogen peroxide, dialkyl peroxy carbonate, alkali or alkaline earth persulphate, ammonium persulphate, azobisisobutyryldinitrile, oxygen or air. The polymerization may be in bulk or in a solvent such as cyclohexane or benzene.  The products are viscous liquids of boiling point above 240 DEG C. and of molecular weight 460 to 675.ALSO:4-Methylpentene-1 is polymerized at a pressure of at least 2000 p.s.i.g. using a catalyst such as tertiary butyl hydroperoxide, ditertiary butyl peroxide, dicumyl peroxide, diethyl peroxide, lauroyl peroxide, benzoyl peroxide, hydrogen peroxide, dialkyl peroxycarbonate, alkali or alkaline earth or ammonium persulphate, azobisisobutyryl dinitrile, oxygen or air. The polymerization may be in bulk or in a solvent such as cyclohexane or benzene.  The products are viscous liquids of boiling point above 240 DEG  C. and of molecular weight 460 to 675.
Patent GB-1026767-A (GB)
Title: Improvements in or relating to methods of manufacturing semiconductor devices
IPC: H01L21/479
Filed: 1963-03-29
Abstract: 1,026,767. Preparation of semi-conductors. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. March 29, 1963 [April 3, 1962], No. 12552/63. Heading H1K. A semi-conductor device having a cadmium sulphide body, either of N-type CdS throughout or having a surface layer of N-type CdS, is manufactured by applying to the surface of the body or layer an acceptor impurity which is diffused into a zone of the body or layer under the simultaneous action of either sulphur or oxygen. In one example a photo-voltaic cell is manufactured from a single crystal wafer of N-type CdS, Fig. 1, one side of which is coated with sulphur 2 on to which is deposited from the vapour phase a layer of copper 3. The wafer is then mounted on a heat sink 10, Fig. 2, and is subjected first to a jet of argon heated by a resistance furnace 15 and then a stream of the gas passed through liquid air 16. The copper is then masked and part is etched away using an aqueous solution of an alkaline cyanide in a manner disclosed in Specification 1,026,766 to form an annular electrode 34, Fig. 3. On the reverse side of the semi-conductor a layer 35 of zinc, and another 36 of copper, form the second electrode and nickel conductors are fixed to the two with a silver paste. In another example the sulphur layer is omitted, the copper layer 3 is electro-deposited from a coppersulphate solution, and oxygen is used instead of argon so that a zone doped with copper and incorporating oxygen instead of sulphur is formed. The partly oxidized copper remaining is then completely removed and a gold electrode is deposited. In a further example silver is used as the acceptor impurity.
Patent GB-355313-A (GB)
Title: Improvements in or relating to the separation of intermixed divided materials
IPC: B03B4/02
Filed: 1930-04-23
Abstract: 355,313. Separating solid materials. WHITE, A. E., 5, Quality Court, Chancery Lane, London.-(Peale, R. ; Graybar Building, Davies, W. S. ; 103, Park Avenue, both in New York, and Oakes, W. B. ; 321, Park Avenue, Rutherford, New Jersey, both in U.S.A.) April 23, 1930, No. 12586. [Class 117.] In the separation of mixed materials such as coal and shale by passing them over an air-pervious bed and subjecting them to the upward pressure of air, the variation in the depth of the bed from a predetermined amount is utilized to control the feed of the materials or the air pressure or both so as to accommodate changes in the character of the materials under treatment. The apparatus described comprises a jigging table 1, Fig. 2, which is provided with an arm 120, preferably adjustably weighted at 122, lying on the surface of the material and secured to a rotary shaft 121. The feed mechanism and air valves are adjusted by reversible electric motors, and a drum 138 on the shaft 121 carries two sets of contacts separated by an insulated zone which are brought into play as the arm 120 rises or falls to drive the motors in the required direction. Instead of a single arm, a number may be disposed across the width of the table and be adapted to actuate a number of switches in series so as to prevent actuation of the control devices by merely local variations in the depth of the bed. The control arm and associated parts are carried by a vertically adjustable plate 150. Switches may be included in the circuits of the control motors so that any one or more may be thrown out of use if desired. Mechanical or pneumatic means may be used for transmitting the variations in depth to the control means.
Patent GB-252202-A (GB)
Title: Improvements in or relating to means for reducing the effects of atmospheric and thelike disturbances in the reception of wireless telegraphy
IPC: H04B1/10
Filed: 1926-05-17
Abstract: 252,202. Siemens & Halske Akt.-Ges. May 16, 1925, [Convention date]. Heterodyne receiving systems; atmospherics, eliminating or limiting.-Means for reducing the effects of atmospheric and like disturbances in a telegraph receiving system comprise a low-frequency wave filter, the transmission band of which has a lower limit not smaller than the transmission band of the high-frequency filter, the tone frequency resulting from heterodyning and rectifying being passed through the lowfrequency filter. The rectifying valve operates at a point on its characteristic at which its second differential is a maximum. In the system described, the high-frequency filter 2 has a frequency 200,000 + 4000, that is it has a transmission band of 8000. The filter 2 and local oscillator 3 are connected through a detector 4 to a low-frequency filter 5, the lower limit of which is not less than 8000 and may be say 10,000. The signals pass through a second detector 6 to a relay or indicator 7.
Patent GB-717067-A (GB)
Title: Improvements in or relating to devices for treating work-pieces of a tubular shape by inductive heating in a magnetic high-frequency field
IPC: H05B6/36
Filed: 1952-05-19
Abstract: 717,067. Induction heating. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 19, 1952 [May 22, 1951], No. 12599/52. Class 39 (3) A workpiece comprising tubular parts 1, 2 to be brazed is heated by a pair of members 3, Fig. 1, each comprising terminal parts 10, 11 and semi-cylindrical parts 4, 5 for surrounding the workpiece. The parts 4, 5 have slots 8, 9 for obtaining a more uniform current distribution therethrough, and thereby a desired heating of the tubular parts 1, 2. In Fig. 3, each inductor member 13 has current supply conductors 14, 15 connected to parts 16, 19 separated by a slot 17 opening into a slot 20 in a part 22, and the current flows in the direction of the arrows.
Patent GB-1206378-A (GB)
Title: Metal alloy powders
Inventor: YURASKO GEORGE JR
IPC: C22C33/02
Filed: 1967-09-15
Abstract: 1,206,378. Coated Fe-alloy powder. EUTECTIC WELDING ALLOYS CORP. Sept. 15, 1967 [Sept. 22, 1966], No.12603/70. Divided out of 1,205,793. Headings C7A and C7F. A powder useful in welding and flame-spraying consists of Cu-coated particles of an alloy consisting, by weight, of:- Mo 0-5% W 0-5% Cr 0-30% C 1-4À5% Ni 0-49 Si 0-5 B 0-4 Fe balance, and in greater amount than any other constituent Coating may be effected by immersing the alloy powder in copper sulphate solution. Phosphorus may be deposited on the Cu-coating e.g. by chemical or electrolytic treatment in a dry mixture with copper phospate: oxidation of the Cu/P layers produces different colours. Further colouring may be achieved by alloying Au, Ag or Pt with the Cu-coating e.g. by chemical displacement in solution.
Patent GB-1373469-A (GB)
Title: Magnetic tape recording and or reproducing apparatus
IPC: G11B15/675
Filed: 1973-03-15
Abstract: 1373469 Tape cassette apparatus; loading cassettes RI-EL RICERCHE ELETTRONICHE SRL 15 March 1973 [15 March 1972] 12625/73 Heading G5R A cassette player includes a pivoted container 12, into which a cassette is inserted through an aperture at the side 12<SP>1</SP> adjacent to the pivot points 11 and which has secured thereto guides 31, 32 for a support 27 carrying a head 26 and pressure roller 25, a cam device 36-38 moving the support 27 towards the container 12 against spring 35 as the container 12 is lowered on to to a drive spindle (14), Fig. 1 (not shown), so that the head 26 and roller 25 enter container apertures 24, 23. The cam device comprises an inwardly downwardly sloping extension 36 on the support 27, which engages an aperture 37 in a slide 38. The slide 38 may be moved longitudinally by a push-button (39), Fig. 1 (not shown) during fast transport, to retract the head 26 and roller 25. A pin 20 on the container 12 engages in a slot of a lever 18 to hold the container in its raised position against the force of a spring 22; an inserted cassette abuts the lever 18 to release the container. The container 12 is raised by pressure on end tab 12<SP>1</SP>.
Patent GB-756668-A (GB)
Title: Improvements in and relating to the production of regenerated cellulose threads
Inventor: ENTWISTLE DONALD
IPC: D01F11/02
Filed: 1953-05-07
Abstract: The extensibility of regenerated cellulose thread of high dry tenacity (obtained by extruding viscose into an aqueous solution containing not less than 55 per cent by weight of sulphuric acid, stretching the thread obtained, and washing with water or dilute acid) is increased by continuously advancing the washed thread in the form of a helix along one or more thread-advancing devices, applying an aqueous solution of an alkali metal hydroxide having preferably a concentration of 2-5 per cent to the helix, allowing the thread to shrink in a controlled and uniform manner while it is travelling along the thread-advancing device or devices, removing the alkali metal hydroxide solution from the thread by washing and then drying the thread under conditions where it is free to shrink.  Preferably the treated thread is collected before it is dried.  In the example, viscose is extruded at 20 DEG  C. into an aqueous coagulating bath containing 66 per cent by weight of sulphuric acid and the thread is withdrawn from the bath, stretched 135 per cent in a bath of hot dilute sulphuric acid and then passed to a series of pairs of thread-advancing rollers.  On the first pair of rollers the thread is quenched with water and is temporarily stored to complete the regeneration.  The thread is then washed free from acid on a second pair of rollers and is passed to a third pair of rollers tapered in the direction of thread travel.  A 5 per cent aqueous caustic soda solution is applied to the thread from a drip tube and the thread shrinks about 5 per cent, the degree of shrinkage being controlled by the taper of the rollers.  The thread is then passed to a fourth pair of rollers where it is washed with dilute acid and then with water. The taper of the third pair of rollers and the difference in peripheral speed between the third and fourth pairs of rollers is such that the thread shrinks by 7 per cent.  The thread is then collected in a rotating centrifugal box.  Specifications 274,521, 281,352, 319,293 and 323,731, [all in Class 2 (ii)], are referred to.
Patent GB-141217-A (GB)
Title: Improvements in the operating and tripping mechanism of oil break electrical switches
IPC: H01H71/50
Filed: 1919-05-21
Abstract: 141,217. Norton, R. T. May 21, 1919. Automatic circuit-breakers and oil switches with a loose-handle closing and tripping mechanism. The closing-handle a is furnished with a crank and jointed to one end of a telescopic but normally rigid link e, e<1>, of which the other end is jointed to the pivot pin of a toggle g, g<1> attached to switch members (not shown). The two parts of the link are, during the closing movement and in the closed position of the switch, held rigidly together by a latch k engaging a pin or roller h, and are fitted with mutual guides in the form of wings e<3>, e<4> so as to be incapable of turning movement. A light spring may be employed to keep the latch and pin in engagement. When the latch is knocked out by a trip coil plunger n<1> or otherwise, the link telescopes, a slot e<2> riding over the pin h, the toggle is left unsupported, and the switch members are thrown off. In reclosing, the handle is drawn back till the compound link takes its full length and the latch re-engages. The handie is then moved forward to complete the closing movement.
Patent GB-248220-A (GB)
Title: An improved sanitary pail
Filed: 1925-05-16
Abstract: 248,220. Chandler, W. G. May 16, 1925. Commodes.-A pail is provided with a rounded rim A to serve as a seat. Reference has been directed by the Comptroller to Specification 19072/13.
Patent GB-611353-A (GB)
Title: Improvements in the production of cellulose derivatives
IPC: C08B3/22
Filed: 1946-04-29
Abstract: Water-soluble organic esters of cellulose are obtained from solution in a mixture of water and a water-soluble organic solvent for the ester as solids or in concentrated aqueous solution substantially free from organic liquids by a process comprising subjecting the solution to extraction with a substantially water-insoluble liquid which is a solvent for the said water-soluble organic solvent and a non-solvent for the cellulose ester, thus substantially completely removing said water-soluble organic solvent from the solution of the cellulose ester, and then precipitating the cellulose ester from said solution or concentrating the solution without causing the cellulose ester to precipitate.  The extraction of the water-soluble organic solvent may be carried out by addition of ethyl acetate, butyl acetate, petroleum ether and mixtures thereof, but isopropyl ether or a mixture of 70 per cent ethyl acetate and 30 per cent benzene by weight is preferred.  The extraction may be effected at 10 DEG -70 DEG  C. and preferably at about 40 DEG  C., and it is continued until the solution contains between 0.01 and 1 per cent of water-soluble organic solvent.  The process is applicable to any water-soluble cellulose ester, and particularly to water-soluble cellulose acetate, the solvent to be removed being acetic acid.  The ester may be prepared by hydrolysis in a plurality of stages of cellulose acetate in the medium in which it has been prepared or of the precipitated and dried ester.  It is particularly applicable to the further hydrolysis of "fines" obtained on filtering commercial acetone-soluble cellulose acetate which has been precipitated from solution.  In an example 100 parts by weight of wet water-laden cellulose acetate fines are dissolved in glacial acetic acid containing 4 per cent sulphuric acid on the weight of cellulose acetate.  The hydrolysis is carried out at 70 DEG  C. with gradual addition of water for 20 hours, the acetyl value being reduced from 54 to 21 per cent (calculated as acetic acid). After neutralization of the sulphuric acid with magnesium acetate, the solution is counter-current extracted with isopropyl ether and the water-soluble cellulose acetate recovered by evaporation of the water or by precipitation with acetone or dioxane.  If desired, the solution after extraction may be employed for the direct formation of films, foils and the like.  Specification 568,047 is referred to.
Patent GB-778074-A (GB)
Title: Improvements in or relating to building constructions
Inventor: HARRISON DONALD DEX
IPC: E04H1/00
Filed: 1954-05-04
Abstract: 778,074. Building frameworks. DEX (PREFABRICATIONS), Ltd. April 22,1955 [May 4, 1954], No. 12934/54. Class 20(2) A building structure comprises standardized beam and column members, each beam being adapted to be set at a predetermined angle to the horizontal and having connector formations uniformly spaced along its length at such distances that corresponding connectors on connected beams in any vertical plane lie in vertical lines above one another. The angles of inclination of the beams are in a series tan -1 (a/m), where a, m are whole numbers from 1 to 10, a, m being the vertical and horizontal distances apart of adjacent connectors; connectors are also provided on  the column members at regular distances a along their lengths. In Fig. 2 the standard vertical increment is 1/5 of the standard horizontal increment, so that beams T<SP>1</SP>, T<SP>2</SP> are designed'to be used at angle tan <SP>-1</SP>1/5, beams T<SP>3</SP>, T<SP>4</SP> at tan <SP>-1</SP>2/5 &c. Specification 770,901 is referred to.