baber/WOPTO huggingface dataset:
Patent GB-1103990-A (GB)
Title: Parametric amplifier
Inventor: AITCHISON COLIN STUART
IPC: H03F7/04
Filed: 1967-02-10
Abstract: 1,103,990. Parametric amplifiers. MULLARD Ltd. 10 Feb., 1967, No. 6413/67. Heading H3B. A parametric amplifier uses a Gunn effect element both as the source of pumping frequency and as the variable capacitance element. A degenerate amplifier (fp -fs = fi, where fp = 2fs} is shown in Fig. 2, the Gunn effect element 1 being located in a length of low height waveguide which at one end is terminated by an adjustable shorting piston 5, and at the other end is coupled to a normal height waveguide 6 by an abrupt matching transistion #p/4 long. This normal waveguide is optional and provides a low output monitoring circuit for the pumping frequency. The input and output signals are common to a coaxial line 7 which is matched to a #p/4 transformer line section 8 and a #p/4 inductive section 9. The pump frequency is isolated from the signal circuit by a short-circuit provided by inductive section 9 and a #p/4 annular slot 10, while the widths of the inner and outer conductors of inductive section 9 are so chosen as to provide an inductance of suitable value which resonates with the capacitance of the element 1 at the signal frequency. D.C. energization of the element 1 is effected between the inner conductor of line 7 and a conducting plate 10 of an R.F. shunt which is insulated by an annular spacer 11. A non-degenerate amplifier (fp = fs + fi, where fi > fs) is also described, Fig. 3, a low-pass #8/4 filter section 12 being connected between transformer 8 and the element 1 which shortcircuits the element at the idler frequency and prevents the pumping frequency from passing into the signal line 7. Short-circuited #1/2 line 9<SP>1</SP> is inductive at the signal frequency and tunes the element 1 at the signal frequency. Line 9<SP>1</SP> may be adjustable in length to provide amplifier tuning.
Patent GB-1502651-A (GB)
Title: Chuck
IPC: B23B31/173
Filed: 1975-02-14
Abstract: 1502651 Chucks ETABS AMYOT SA 14 Feb 1975 [19 Feb 1974] 6414/75 Heading B3B A chuck comprises a body 1, grooves 11 in the body inclined to the axis of the body to converge towards a tool receiving end of the body, jaws 2 slidable in the grooves, an actuating nut 3 rotatably carried by the body and having a threaded bore, to engage threaded portions on the jaws 2 so that rotation of the nut on the body causes movement of the jaws along the grooves 11, and a ring 4 having teeth to be engaged by a chuck key and a shoulder adjacent the teeth with an internal diameter smaller than the external diameter of the nut to retain the ring on the nut. The chuck is characterized by the nut and/or the ring being made of sintered metal, and by the provision of a separately formed skirt 5 surrounding the body at its spindle drive receiving end. The skirt 5 may be a steel, plastics or cast light alloy tubular member which is an interference fit on the ring 4 with an inturned end engaging a shoulder or groove of the ring 4. Alternatively the skirt may engage with the nut, with the ring 4 external to the skirt 5. The chuck arrangement is said to resist loosening in a percussive drilling operation.
Patent GB-100990-A (GB)
Title: Improvements in Sewing Machines.
Inventor: FAIRWEATHER WALLACE
IPC: D05B3/06
Filed: 1915-10-25
Abstract: 100,990. Fairweather, W., (Singer Manu. facturing Co.). Oct. 25, 1915. Button-hole sewing-machines.-Relates to but. ton-hole sewing-machines in which the stitchforming elements are mounted on rotary supports above and below the work and are actuated by toothed sectors engaging pinions carried thereon. The upper sector 115 is fulcrumed between the arms of a yoke 111 secured to the bracket arm, and the lower sector 121 is fulcrumed on a stud 119 screwed into a bracket 118 secured to the bedplate, the fulcra being in alinement with each other and parallel with a rock-shaft 125, which is driven by a cam-groove on the feed-wheel 141 and actuates the sectors through crank-arms 127, 128 and adjustable links 130, 131, 132, 135, 136, 137. The button-hole cutting device is disposed so that the members move in a plane approximating that of the needle-path and have a range of movement intermediate the fulcra of the sectors, the rock-shaft 125 being disposed in the rearward part of the machine and at one side so as not to interfere with the assembly or removal of the cutting-device and other operative parts.
Patent GB-452923-A (GB)
Title: Improvements relating to the electrical warming and electrical serving of buildings
IPC: F24D13/02
Filed: 1935-03-01
Abstract: 452,923. Supply systems for consumption apparatus. PARTRIDGE, T. G., 2, Chester House, Eccleston Place, Westminster. March 1, 1935, No. 6510. [Class 38 (iv)] [See also Group XI] A building having a supporting steel framework is warmed by passage of a low-tension current, e.g. 50 volts and a frequency of 150 cycles through the framework, on which tappings are made for driving currents for other services in various parts of the building, e.g. lighting, radiant heating, cooking, water heating, ironing or refrigeration. The current may be stepped up for these purposes. Specification 419,843, [Group XI], is referred to.
Patent GB-1211940-A (GB)
Title: A process for the manufacture of electrophotographic photoconductive powder
IPC: G03G9/00
Filed: 1968-02-09
Abstract: 1,211,940. Photo-conductive powder. FUJI SHASHIN FILM K.K. Feb.9, 1968 [Feb.9, 1967(2)], No.6544/68. Heading G2H. [Also in Division H1] Photo-conductive particles for forming powder images in an electrostatographic process are made by dispersing a resin monomer and powdered photoconductor particles or a resin monomer having powdered photo-conductor particles dispersed therein, a liquid medium which has little or no compatibility with the monomer and while maintaining the dispersed condition, polymerizing the monomer. The photo-conductor particles may be Se, S, CdS, HgI 2  ZnO, TiO 2 , anthracene or a phthalocyanine, a non-photo-conductive powder coated with a photoconductor. The monomer may be styrene, ethylene, vinyl acetate, ethyl acrylate, methyl butyl or ethyl methacrylate, acrylonitrile, methacrylonitrile, acrylamide methacrylamide, vinyl isobutyl ether, vinyl hexyl ketone, vinylidene chloride or N-vinyl carbazole benzolyl peroxide may be incorporate in the dispersion as a polymerisation initiator-copper stearate may be used to aid the dispersion. Mixtures of monomers may be used. Thus in one example, a dispersion of CdS and sodium polymethacrylate in water is added to a dispersion of methyl methacrylate, styrene and benzoyl peroxide, the mixture heated and the precipitate filtered and dried. This precipitate has the CdS mainly at the surface of the particles. A mixture of CdS and ZnO is used in another example. The photo-conductive particles may incorporate sensitizing dyestuffs.
Patent GB-327530-A (GB)
Title: Improvements in and relating to keyed instruments for producing musical and other sounds and to sound records for reproduction under the control of a key-board or the like
IPC: G10H3/03
Filed: 1929-03-01
Abstract: 327,530. Blossom, J. B., Rimmer, H. A., and Jones, A. D. March 1, 1929. Phonographic instruments of the keyboard type for producing sounds of various kinds comprise a number or rotating sound records in the form of continuous grooves on discs or cylinders and electric " pick-ups " 3 of the needle type in continuous engagement with the grooves, one " pickup " for each groove. In the electrical circuit of each " pick-up " is a contact 6 operated from the keyboard, so that sound is produced when the circuit is closed by the appropriate key on the keyboard being pressed. The " pick-ups " 3 with their respective contacts 6 are arranged in parallel and connected to terminals 4, to which is connected, through an amplifier, a loudspeaker.
Patent GB-539249-A (GB)
Title: Looper mechanism for sewing machines
IPC: D05B1/06
Filed: 1940-04-13
Abstract: 539,249. Sewing machines. SINGER MANUFACTURING CO. April 13. 1940, No. 6729. Convention date April 15, 1939. [Class 112] A double-loop stitch looper 140; Fig 15, which co-operates with a needle having a variable lateral feed movement, indicated by the loci A, B, is mounted in a carrier 142 fixed upon a oscillatable sleeve 143. An arm 147, also fixed on the sleeve, is connected by a link 151 to a slide 159 mounted on a rod 168 the end of which is pivotally mounted concentrically with the sleeve 143. The slide 159 is pivotally connected at 154 to a rotary crank 155 on the under-shaft 41. A loopspreader 160 is fixed upon a spindle 165 which is reciprocated axially from an eccentric 180 through a sleeve, 170 having crank arms 175 and 169. The loop-spreader has two thread-catching hooks so that if a thread-loop is mixed by the first it may be caught by the second hook. The under thread is introduced through a tube 235, passes a tension device 237 and a rotary take-up 238 and is guided through a tube 243 to the looper. The tube 243 is formed with a helical slot throughout its length to facilitate threading. Feed by dogs The feed dog 137 co-operates with an upper feed provided by the needle, the path of which is shown at A, Fig. 16, and a feed foot. The dog, which has an aperture 127' to receive the needle, is carried by a bar 125 forked at one end and supported by a spindle 123 on a feed rocker 122. The rocker is carried by a shaft 114 which is actuated from a variable-throw eccentric 120. The other end of the bar is carried by a link 136 from a feed lift rocker 135. The needle and upper foot feeds are described in Specification 536,792.
Patent GB-231845-A (GB)
Title: Improvements in paper files and the like
IPC: B42F13/02
Filed: 1925-03-12
Abstract: 231,845. Methner, A. April 4, 1924, [Convention date]. Flexible-band files; covers.-A loose-leaf binder comprises resilient members, one end of each of which is secured to one of the covers or to fold therein, the other end being displaceably guided on the other cover, so forming a bridge-like arrangement which lengthens or shortens automatically as the binder is opened or closed. As shown, the resilient members 6 are secured to the rear cover 3 or to a fold 5 on the back 4, and are adapted to be inserted in guides 7 formed on the front cover 2. The guides 7 may be replaced by a single guide or by eyelets, or may be formed by stamping out from the cover 2.
Patent GB-502512-A (GB)
Title: Improvements relating to light shades
IPC: F21V11/00
Filed: 1938-03-04
Abstract: 502,512. Mounting shades on electriclight bulbs. HAGEN, H. March 4, 1938, No. 6813. Convention date, March 5, 1937. [Class 75'(ii)] A light-shrouding cap or shell a adapted to be placed over an electric-light bulb f is provided internally with a pair of arc-shaped resilient clips c arranged in a plane transverse to the axis of the bulb and supported by arms b depending from the upper edge of the shell in such a position that when pressed over the bulb beyond the widest position, the shell is pressed up against a shade or the like mounted on the lamp holder. The shell is preferably of translucent or transparent light reducing material and is provided at its lower end with a closing lid or cover.
Patent GB-439550-A (GB)
Title: Improvements in and relating to direct current motor drives
IPC: H02P9/00
Filed: 1934-03-03
Abstract: 439,550. Dynamos. BRITISH THOMSONHOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Allgemeine Elektricitõts Ges.; 2, Friedrich Karl-Ufer, Berlin) March 3, 1934, No. 6833. Application for addition to 419,991. Void [Abridged as open to inspection under Sect. 91 of the Acts, Sept. 4, 1934]. [Class 35] Exciting.-A generator to be driven by a combustion engine at a constant speed with varying load as described in the parent Specification is excited by a generator the field of which is in series with the main generator in combination with a constant voltage source such as a battery or a second generator arranged as hereinafter described. In the arrangement shown two exciting generators e<1>, e<2> are employed in series having fields g, k excited by a battery f and fields h, i in series with the main generator a. The two fields of the generator e<1> assist each other and those of the generator e<2> oppose each other. The generator e<1> may be omitted and the battery f connected in series with the generator e<2>.
Patent GB-181088-A (GB)
Title: An improved burglar proof locking device for doors of unattended warehouses or other premises, locked & controlled from the front
IPC: E05C9/06
Filed: 1921-03-02
Abstract: 181,088. Palmer, H. G. March 2, 1921. Multiple-bolt fastenings; sliding bolts.-In multiple-bolt, fastenings in which the bolts are provided with racks operated by a pinion, the pinion is locked against rotation by the bolt of a keylock entering a recess in a boss on the pinion. A main bolt a is shot and withdrawn by a pinion c having a boss t in which is cut a slot V. The main bolt operates a second bolt a<1> through a second pinion c<1> pivoted at r to the casing g. The bolts are locked against withdrawal by shooting the bolt J of the key-lock h into the slot V in the boss t. The bolt J is cut-away at l so that it enters the slot V and partially embraces the pinion c. The bolts a, a<1> may operate additional bolts o by means of bevelled slots in the bolts a and a<1> and inclines on the bolts o. These auxilliary bolts are retracted by springs n when the main bolts a, a<1> are withdrawn.
Patent GB-948303-A (GB)
Title: Improved styrene polymer compositions
Inventor: DAVIES THOMAS ELLIS
IPC: C08L9/00
Filed: 1960-02-27
Abstract: Styrene polymers are toughened with butadiene polymers wherein at least 30% of the butadiene units have the cis stereo configuration. The polymers may be mechanically compounded or the compositions may be obtained by dissolving the toughening agent in the monomeric material from which the styrene polymer is to be obtained and then subjecting to polymerizing conditions. The products are of improved impact strength and find application in deep freeze units. Specication 892,910 is referred to.
Patent GB-207454-A (GB)
Title: Improvements relating to navigational and like sextants
IPC: G01C1/10
Filed: 1923-03-12
Abstract: 207,454. McConkey, J. March 12, 1923. Sextants.-A graduated bar 1 suspended from the sextant carries a zenith pin 3 and a member 8, of which the upper edge 9 is adapted to provide an artificial horizon, is adjustable on this bar so that it may be brought into coincidence with the image of the pin 3 in the horizon mirror. The bar 1 is formed with a slot 4 across which extends a removable pin 5 parallel to the pin 3, and a block 6 pivoting on the pin 5 carries axles 6a and 6<b> adapted to rest on bearings in a bracket 7 pivoted on a pin 7<a> secured centrally to the side of the frame of the index mirror. The member 8 carries a vernier provided with the usual clamping screw 13 and adjusting screw 14. An extended or additional artificial horizon is constituted by the upper edge 25a of the laterallyturned forward end 25 of a bar 22 pivoted on a pin 21 extending across a slot 20 in the member 8. A hole 24 in the rear end of the bar 22 is engaged between nuts 18<a> and 18<b> on a threaded pin 18 projecting from a nut 17 which engages a threaded rod 15 mounted in bearing 16 on the frame 8, one flat side of the nut 17 bearing against the frame. The height of the edge 25<a> is thus adjustable by rotation of the rod 15.
Patent GB-374148-A (GB)
Title: Improvements in or relating to apparatus for extruding plastic materials
IPC: B29C48/06
Filed: 1931-03-06
Abstract: 374,148. Extruding casein &c. ERINOID, Ltd. and LEGGAT, A., 58, Coleman Street, London. March 6, 1931, No. 7076. Addition to 354,837. [Class 87 (ii).] Rods of casein &c. having a multicoloured cross section are extruded by an apparatus comprising members 1 bolted together and having chambers 3 to which the differently coloured materials are supplied. The chambers are partly closed by screens 5 having slots through which the materials pass from the chambers 3 into dies formed by slotting a bar 6 with staggered slots 7, 8 on opposite sides, the slots opening into the lower face 9 of the bar. The extruded ribbons pass into a combining chamber formed by split members 11, and thence through a split extension die 12. The die bar may be arcuate and the end walls of the combining chamber may be tapered.
Patent GB-1137352-A (GB)
Title: New carbamyl compounds and biologically active compositions containing the same
Inventor: GHOSH RANAJIT
IPC: C09D101/18
Filed: 1965-02-18
Abstract: 1,137,352. Thiocarbamyl-substituted lactones. IMPERIAL CHEMICAL INDUSTRIES Ltd. 8 Feb., 1966 [18 Feb., 1965], No. 7078/65. Heading C2C. [Also in Division A5] Novel compounds of the formula where R is hydrogen or lower (C 1-7 ) alkyl, Z is oxygen or sulphur, and X and Y, which may be the same or different are hydrogen or alkyl or together form a heterocyclic ring with the nitrogen atom or X is hydrogen and Y is an alkenyl, halo-aryl, aryl, aralkyl, heterocyclic, heterocyclic - alkyl, dialkylamino, alkoxy-carbonyl alkyl or lactone-carbamyl-alkyl group, may be obtained by reacting a salt of a carbamylthio acid of the formula where M is ammonia or an alkali or alkaline earth metal, with a 3-halogen substituted 2-oxotetrahydrofuran of the formula where Hal is halogen. The reaction may be effected at ambient temperatures to 100 C. in water or an organic solvent or the mono- or dithiocarbamyl compound may be prepared by reacting ammonia or a primary or secondary amine with either carbonyl sulphide or carbon disulphide in the presence of a base and the halolactone may be added to the resultant reaction mixture. The compounds may be used as fungicides (see Division A5).
Patent GB-356677-A (GB)
Title: Method of making wire glass
IPC: C03B13/12
Filed: 1930-03-05
Abstract: 356,677. Glass manufacture. MISSISSIPPI GLASS CO., 220, 5th Avenue, New York, U.S.A.-(Assignees of Baldwin, A. J. ; East Orange, New Jersey, U.S.A.) March 5, 1930, No. 7173. Convention date, Aug. 6, 1929. Void [Published under Sect. 91 of the Acts]. [Class 56.] Rolling.-A method of making wire glass in a continuous strip consists in flowing molten glass into the pass between two rollers, and inserting the wire in the glass before it passes between the rollers and before it has formed a skin. The molten glass 10 flows from a tank furnace 40 into the pass between rollers 12, 14 and is formed by them into a continuous strip 16 which passes down an apron 18 to leer rollers 20. The wire 22, which may be wire mesh or separate wires, is fed around a roller 24 into the glass at a point which is far enough from the furnace to avoid oxidization of the wire, but close enough to the furnace for the temperature of the glass to be sufficient to prevent the formation of a skin thereon. In a modified construction, the roller 24 is replaced by a hollow roller provided with discs which dip into the molten glass.
Patent GB-327828-A (GB)
Title: Improvements in tool chucks and tools for coal cutters and the like
IPC: B25D17/08
Filed: 1929-03-05
Abstract: 327,828. Beattie, S., and Middelburg Steam Coal & Coke Co., Ltd. Nov. 30, 1928, [Convention date]. Loose tools and bits, retaining.-A. chuck for holding the drill in rotary, rotary-percussive, or percussive machines for cutting coal, rock, &c. comprises a body 2 and a jaw 4 hinged thereto which together form a socket 15 for the tool shank 16. The hinge is formed by a link 5 pivoted to both the body and the jaw by pins 6 so as to allow lateral movement of the jaw for centring the tool. The jaw is actuated to grip the tool by a bolt 8 pivoted in a recess in the body by a pin 9 and carrying a nut 12 and a conical washer 13 engaging a recess in the jaw, the latter being slotted at 10 to receive the bolt. The tool shank and socket 15 may be square as shown or of other polygonal cross-section, and a transverse pin 17 in the body engages a recess 19 in the shank to prevent axial withdrawal of the tool during operation. The pins 6, 9 and 17 are secured merely by friction and may be knocked out for replacement when worn. The body 2 has a central boss with a screwed aperture for attachment to the piston rod or rotary shaft of the machine.
Patent GB-163684-A (GB)
Title: Improvements in high tension electrical condensers
IPC: H01G4/02
Filed: 1921-03-07
Abstract: 163,684. Bunet, P. May 18, 1920, [Convention date]. Condensers.-In order to reduce the electrical density at the edges of condenser plates, the plates are formed, at least near their peripheries, of solid or hollow bars or rods c. The rods may be arranged with increasing diameters and at increasing distances from one another as the edges are approached. Connections d (only one of which is shown) are provided between adjacent rods. The rods may be arranged to form a cylinder, either in the form of rings, the: distance between which increases towards the extremities of the cylinder, or in the form of a helix of increasing pitch. The central portions a of the plates or cylinders may be formed of a single or double sheet of metal, which may be plane or corrugated, and solid or apertured. For cylindrical condensers of great length, several elementary cylinders of reduced length may be combined to form the complete condenser plate. The plates are immersed in an insulating-liquid or embedded in plastic or solid insulating-material, insulating distance-pieces e and cardboard or like barriers f being inserted between the plates. The central portions of the plates may be formed wholly or in part cf paper, cardboard, or the like coated with metal or otherwise rendered conductive of electricity.
Patent GB-1249917-A (GB)
Title: High strength high ductility iron-cobalt alloy
IPC: C22C38/10
Filed: 1969-02-11
Abstract: 1,249,917. Magnetic alloy sheet. WESTINGHOUSE ELECTRIC CORP. Feb. 11, 1969 [Feb. 23, 1968], No. 7299/69. Heading C7A. An alloy comprising 35-65% Co and 30-64% Fe, with optional additions of 0À5-4% V, 0À1% Cr, 0À1% Mn and 0-0À5% Si, which exhibits an orderdisorder transformation phenomenon, is cold rolled to final gauge and up to 50% of the sheet volume of the cold rolled crystal grain structure is recrystallized by means of an anneal. The sheet exhibits a yield strength of at least 70,000 psi, a ductility of at least 8%, a coercive force of less than 100e, and a magnetic induction at 2, 500e of at least 22,000 gauss. The anneal may be at 670-760‹ C. for 7 hours to 3 minutes and may be effected before or after assembling laminations for dynamo-electric machines punched from the steel.
Patent GB-329067-A (GB)
Title: Improvements relating to mechanical speed gearing
IPC: F16H15/28
Filed: 1929-03-06
Abstract: 329,067. Fraser, R. P. March 6, 1929. Driving-arrangements.-Variable-speed friction gearing for use in photographic recording comprises a driving spherical segment 1 mounted on the shaft 2 of an electric motor 8, and an engaging bevel-wheel 4, of small radius relative to the segment, mounted on an axially-immovable driven shaft 5. The face-angle of the bevel-wheel is such that line contact is approximately obtained. The gear ratio is varied continuously from zero upwards by rotating the motor about a vertical axis through the centre of the sphere to which the segment belongs, and to permit of this the motor is mounted on a turntable 9 provided with arcuate slots engaging clamping-bolts 10. The arrangement is applied to the prolonged transmission of very high speeds of the order of 20,000-30,000 R.P.M. and the spherical member is machined from the solid and polished, the bevel-wheel preferably being leather-faced. For the purpose of photographically recording explosion flames the drum 11 carries light-sensitive material, or alternatively a mirror or mirror system to throw an image upon a stationary light-sensitive surface.