baber/WOPTO huggingface dataset:
Patent GB-1084018-A (GB)
Title: Apparatus comprising a microphone and an amplifier
IPC: H03F3/185
Filed: 1964-09-04
Abstract: 1,084,018. Capacitor microphones; transistor amplifiers; substation circuits. NORTHERN ELECTRIC CO. Ltd. Sept. 4, 1964 [Sept. 4, 1963], No. 36441/64. Headings H3T, H4J and H4K. A self-polarized electrostatic microphone has its output connected to the matched input of a semi-conductor amplifier. The diaphragm is of polyethylene terephthalate sheet, on one side of which is deposited an aluminium layer, and is prepolarized by heating it to about 120‹ C., exposing it to an electrostatic field having a potential gradient of 20 KV/cm., and allowing it to cool in the field. In one construction (Fig. 4), a perforated or indented metal plate 69 supports the diaphragm and forms one end of a cylinder 70 which defines an acoustic chamber 71. The microphone is supported by a clamped metal ring 73 and an electrically conductive lead screw 74. Connections to a printed circuit amplifier mounted on a board 72 are made by two conductive paths. One is defined by the cylinder 70, the screw 74 and an insert 75 fixed to a conductive ring 76. The other is defined by the aluminium layer on the diaphragm, the ring 73, a cap 64, frame 61 and a conductive ring 81 on the board 72. Leads from the amplifier and from power supply terminals are passed through an aperture 83. A second construction (Fig. 5) suitable as a replacement for a carbon microphone telephone transmitter, has in one chamber a conductive lead screw 74 in direct contact with the perforated metal plate 69. A thin diaphragm 86 protects the main diaphragm. An amplifier mounted on a circular insulated chassis 89 is encapsulated in epoxy resin 90 in a second chamber. Wires connect the microphone to the amplifier. The amplifier output terminals are arranged for spring contact connection by using a central conductive button 93 and a conductive ring 94. The amplifier may use a printed circuit, a thin film circuit or an integrated circuit. Amplifier circuits.-Two amplifier circuits are described. The first (Fig. 2, not shown) comprises a field effect transistor (19) connected in source follower configuration followed by an emitter follower-connected transistor (20) which presents a low impedance output for coupling to a transmission line. The second circuit (Fig. 3, not shown) comprises a single stage feedback amplifier composed of transistors (37, 38, 39) and a bridge circuit (40). Transistor (37) is a field effect transistor. Transistors (38) and (39) are a complementary pair. Opposite terminals (16) and (17) of the bridge circuit serve as an input for a source of direct current, namely a telephone subscriber's loop circuit. The output from the transistors (37, 38, 39) modulates the current from the power source and this modulated current causes a fluctuating potential at the terminals (16, 17).
Patent GB-1304908-A (GB)
IPC: H01R12/71
Filed: 1970-07-30
Abstract: 1304908 Two part couplings INTERNATIONAL BUSINESS MACHINES CORP 30 July 1970 [16 Sept 1969] 36887/70 Heading H2E  An electrical connector assembly 21a, 21b &c. comprises a plurality of discrete housings 23a, 23b &c. each containing one or more contacts 27, 28 and being detachably connected to a planar holder 22a, 22b &c. whereby the contacts can be simultaneously connected with terminal pins 17. The holder 22a, 22b &c. comprises a flat flexible plastics card with a series of parallel slots 38 while the housings 23 each comprise a plastics box-like structure with a tab 34 which engages in a slot 38 to connect the housing to the holder. The contacts 27, 28 are attached to cables 24 and the attached cable ends are embedded in a moulding non-conductive body 31 projecting from the housing 23, with retaining edges 32 of the contacts engaging the housing. An assembly 21 is mounted on a panel board 15 by manually gripping the holder 22 and positioning it so that the required terminal pin enters a hole 30 in a respective housing to engage the contact 28 and a ground rail 18 on the board enters a slot 29 in the housing to engage contact 27. An individual housing can be selectively disconnected and removed without dismounting the holder from the board by sliding the housing upwardly so that the tab 34 slides in the slot 38, and bending the holder and removing the tab through the wider medial portion 41 of the slot. The holders may be notched at 45 for providing a visual check of position when mounted on a panel board.
Patent GB-925389-A (GB)
Title: Method and apparatus for confining a plasma
IPC: H05H1/12
Filed: 1961-10-16
Abstract: 925,389. Thermonuclear apparatus. UNITED STATES ATOMIC ENERGY COMMISSION. Oct. 16, 1961 [Dec. 23, 1960], No. 36979/61. Class 39 (4). Thermonuclear apparatus comprises an endless torus-shaped tube having end loops, means for providing a heated plasma in the tube, means for providing in the tube a first cylindrical magnetic field having a rotational transform, and means for introducing a longitudinal magnetic cross-field component into the end loops at right angles to the tube to counteract the tendency of increasing plasma density to shift the first magnetic field toward the inside wall of the tube. The apparatus may be of the "Stellerator" type provided with a helical coil 41, Fig. 4, round its end loops, alternate windings of the coil being oppositely energized so that in co-operation with the main focusing coil (not shown) a magnetic field having a rotational transform is produced. Two longitudinal conductors, of which one 106 is shown in Fig. 4, extend round the outer circumferences of the end loops and are located in cross-section at uniform small angles above and below the plane of the axis of the tube. Similarly, two conductors, of which one 108 is shown, extend round the inner circumferences. The two pairs of conductors are energized by direct current, the inner pair in the opposite direction to the outer pair, to provide a transverse component to the main focusing field and preferably are arranged to produce a field in a constant ratio to the main field. In an alternative arrangement the transverse component of the magnetic field is produced by setting all the main field coils at an appropriate uniform small angle with respect to the plane containing the axis of the tube. In another arrangement, Fig. 6, a coil 141 replaces coil 41 and the longitudinal conductors and provides the rotational transform and the transverse magnetic field. The coil 141 comprises sections of five windings each, the current flowing in opposite directions in adjacent sections and adjacent sections being coupled by loops 142; closed loops 143 are provided between adjacent sections. In a modification, Fig. 8 (not shown), the closed loops are omitted. Specifications 844,291, 866,544 and 867,315 are referred to.
Patent GB-1381537-A (GB)
Title: Support structure for a roller
IPC: D21F7/00
Filed: 1972-08-09
Abstract: 1381537 Supports for rollers MASCHINENFABRIK ANDRITZ AG 9 Aug 1972 [18 Aug 1971] 37095/72 Heading F4G A roller, e.g. the upper roller 1 of the press part of a paper machine is carried in bearings 4 by a cantilever 3 pivoted at 5 to a frame 7, a support member 14 normally supporting the free end 11 of the cantilever 3 but being pivoted to the pillar 15 of the frame 7 so as to be swing- able away from the free end 11 to provide access for changing a felt 12 or foraminous belt 13. The end 8 of the cantilever 3 has to be clamped to a pedestal 9 by a lever 10 before the support member 14 is swung away from the free end 11. The support member 14 is secured to the free end 11 by nuts 16, 17 engaging bolts and eyebolts respectively, and to the frame pillar 15 by nuts engaging eyebolts 19. Lugs 20 on the support member 14 are received between pairs of lugs 21 on the frame pillar 15, and are connected to the lugs 21 by pivot bolts 23. The nuts and bolts 16, 17 and 19 may be manipulated so that the support member 14 can then be swung through 180 degrees about its vertical (or horizontal or inclined), pivot axis.
Patent GB-1484947-A (GB)
Title: Duplicating machines
IPC: G03G21/14
Filed: 1974-08-23
Abstract: 1484947 Controlling duplicators ADDRESSOGRAPH-MULTIGRAPH CORP 23 Aug 1974 [2 Nov 1973] 37271/74 Heading B6C A rotary duplicator is controlled by items of numerical identification data placed in predetermined positions with respect to the lead edge of a master, a fixed read head sensing the data on a rotating master and being operated in synchronism with signals generated in response to the cylinder position. The data markings are carried near the longitudinal edge of the master and may be positioned within wide tolerances, and are produced either by the same computer printout as types the master, or by handencoding. Fig. 4 shows a master 12 with three designated areas 36, 37, 38 for hundreds, tens and units in copy counting, the number of marks in each area providing the numerical value for each digit. Timing discs (19), Fig. 2 (not shown) associated with the print cylinder trigger the read head (18), Fig. 1 (not shown), or appropriate points in the rotation of the cylinder, since the master is clamped in a definite position on the cylinder.
Patent GB-1124825-A (GB)
Title: Centrifugal casting mould
IPC: B22D13/04
Filed: 1965-09-01
Abstract: 1,124,825. Centrifugal casting. ZIMMERMANN & JANSEN G.m.b.H., and SIEGLANDER KUPFERWERKE G.m.b.H. 1 Sept., 1965 [1 Sept., 1964], No. 37414/65. Heading B3F. A centrifugal casting mould for casting'articles of large surface area and small height such as a damper-plate. is adapted for rotation about an axis and comprises two separable mould parts 1 and 2 defining a cavity extending substantially perpendicular to the axis 7 of rotation and a core 4<SP>1</SP> located in the cavity to define with the cavity wall a space wholly surrounding the core and communicating with an ingate 6, the diameter of the ingate being substantially equal to the distance between adjacent parallel walls of the core and the cavity. The core is supported in the mould by carriers denoted by their centre lines 5 and which extend into the core and through the wall of the mould. The mould halves are each provided with vent passages 11 which communicate with an annular duct 10 to facilitate the removal of gases generated during the casting operation. The mould halves may be wholly or partly permanent shell moulds. The core remains in the finished casting when solidified.
Patent GB-1436330-A (GB)
Title: Mechanical alignement devices
IPC: G02B7/00
Filed: 1972-08-11
Abstract: 1436330 Adjusting optical mounts DEFENCE SECRETARY OF STATE FOR 10 Aug 1973 [11 Aug 1972] 37496/72 Heading G2J  A mechanical alignment device e.g. for a laser on an optical bench or for mirrors or lenses comprises two members 1, 2 each having a flat surface and connected together through three universal joints spaced apart in triangular configuration. One of the joints is a ball joint 3, 4; another comprises a first wobble pin 13 having its ends in recesses 16, 17 in the members 1, 2 and the third joint comprises a second wobble pin 20 having one end in a recess 22 in member 2 and its other end in a recess in an adjusting screw 25, rotation of which causes the members 1, 2 to tilt relatively. A third wobble pin 31 is also provided and is arranged with its length parallel to the flat surfaces of the members. One end of pin 31 is received in a recess in a pedestal 34 connected to member 2 while the other end lies in a recess 36 in an adjusting screw 37, rotation of which causes a relative rotation of members 1, 2 about an axis 51 perpendicular to the flat surfaces. Springs 8 and (42), Fig. 2 (not shown) are provided to urge members 1, 2 together and into contact with the ball joint and the three wobble pins.  In use, the lower member 2 is placed on an optical bench and the optical element is placed on the upper member 1 directly over the ball joint 3, 4. Knobs on screws 25 and 37 are rotated to achieve the desired alignment.
Patent GB-840278-A (GB)
Title: Production of organic silicon compounds
IPC: C07F7/04
Filed: 1957-12-04
Abstract: Tetraethylorthosilicate is partially hydrolysed with 0.08 to 0.20 mol. (i.e. approx. 0.7 to 1.7% by weight) of water per mol. of silicate.  Preferably the silicate is used in admixture with ethanol with which the water may be mixed prior to the hydrolysis. This hydrolysis may be applied to the crude reaction product of SiCl4 and at least the stoichiometric amount of ethanol; whether anhydrous ethanol or ethanol containing less than 0.5% of water is used for reaction with SiCl4, the resulting product is hydrolysed with water or additional water within the above molar range to yield, after removal of HCl and ethanol, a mixture of tetraethylorthosilicate and hexaethoxydisiloxane, which may be separated by fractional distillation under reduced pressure, and a high-boiling residue containing an average of 3.5 Si atoms per molecule.  An example is given.
Patent GB-353369-A (GB)
Title: Means of preventing sweating and frosting of shop and other windows
IPC: A47L1/16
Filed: 1930-12-16
Abstract: 353,369. Preventing condensation on windows. HENDERSON, D., 86, Parkhead Street, Motherwell, and McGOWAN, D., New Road, Glenboig, both in Lanarkshire. Dec. 16, 1930, No. 37868. [Class 20 (iii).] Dimming of windows by condensation is prevented by forcing heated air from a fan and heater E, G, through jets or orifices C next the window. The electric heater has a three-stage control switch H. The orifices are formed by jets C<1> in attachments opposite holes C in the pipes B. The arrangement of the distributing pipes B for two or more windows is illustrated in Fig. 2.
Patent GB-925853-A (GB)
Title: High voltage semiconductor rectifier
IPC: H02M7/10
Filed: 1959-11-09
Abstract: 925,853. Semi-conductor devices. PACIFIC SEMICONDUCTORS Inc. Nov. 9, 1959 [Dec. 8, 1958], No. 37913/59. Class 37. A rectifier for voltages in excess of 1500 volts comprises a plurality of electrically interconnected individually hermetically sealed semiconductor rectifier diodes in a common hermetically sealed housing. In one assembly, Fig. 2, a number of sealed PN junction silicon diodes 22 are mounted on the axis of a silica filled epoxy resin tube 10. The individual diodes, which comprise tubular glass casings 23 through which metal terminal pins 25, 26 are hermetically sealed, are joined in series by nickel-clad copper wires 27 to form a subassembly. The latter is placed vertically in tube 1 (Fig. 4) with one of its terminal wires 37 threaded through an epoxy resin plug 31 and epoxy resin poured in through funnel 34. Before the resin is hardened by heat a second plug 35 is inserted in the open end of the tube. Laminated epoxy resin impregnated woven fibreglass sleeves 13, 14, coated with epoxy resin are inserted in caps 11, 12 and after heating are coated internally with the resin and pushed over the ends of the tube. The assembly is again heated to harden the resin and the protruding ends of terminal wires 28 cut short, bent into the recesses 17, 16, in the end caps and soldered in place with a tin-antimony solder. In an otherwise similar assembly, Fig. 5, the end caps are of a different construction. In the Fig. 6 arrangement the individual diodes, interconnected as described above, are press-fitted in apertures in a plastic magazine 56. The magazine is assembled in a polytrifluorochloroethylene, epoxy resin or fibreglass tube 70. Apertured metal end caps with resin applied to the threads are screwed on the reduced ends of the tube far enough to make a pressure seal against shoulders 51 and the assembly heated to cure the resin. One of the protruding terminal wires is cut off and soldered in place as in Fig. 2 and the tube filled in vacuo with epoxy resin through the other end cap. After heating to cure the resin the second terminal wire is cut off and soldered in place.
Patent GB-1456070-A (GB)
Title: Magnetoresistive transducer assembly
IPC: G01D5/18
Filed: 1974-09-02
Abstract: 1456070 Transducer head INTERNATIONAL BUSINESS MACHINES CORP 2 Sept 1974 [14 Oct 1973] 38230/74 Heading G5R A magneto-resistive transducer head comprises a magneto-resistive element 10 of, e.g. permalloy, a bias film 16 of soft magnetic material which can also be permalloy and insulating layers 12, 14, 16 of silicon dioxide which space and sandwich the element and film. A sense current I is applied to the element 10 and develops a magnetic field which saturates the bias film 16 and this in turn provides a bias field for the element. Magnetic shields 20, 22 are provided to screen the head.
Patent GB-1234974-A (GB)
Title: Marine structures
Inventor: GEORGIL HANS CHRISTER
IPC: E02D27/52
Filed: 1968-08-09
Abstract: 1,234,974. Casting concrete. H. C. GEORGII. 9 Aug., 1968 [9 Aug., 1967], No. 38275/68. Heading B5A. [Also in Division E1] An underwater structure (see Division E1) includes concrete cylinders each of which is cast by floating a prefabricated end block 1 ballasted by water 5 and progressively casting the cylinder using a form 3 which can be moved along the cylinder as it is formed, the cylinder being progressively ballasted.
Patent GB-323365-A (GB)
Title: Improvements in and relating to glands and means for balancing end thrust in centrifugal pumps
IPC: F16J15/34
Filed: 1928-12-29
Abstract: 323,365. Wade, J. T. Dec. 29,1928. Balancing moving parts; leakage-preventing devices. - A gland or thrust balancing device for a centrifugal pump has a hardened disc 8 of rustless steel fixed on the impeller shaft 7 and having a small hole 9 drilled through it near the periphery. A sleeve 10 is also arranged on the shaft and is held against rotation by a pin 14 attached to a fixed sleeve 11. A spring 16 keeps the large end of the sleeve 10 in engagement with the disc 8, and grooves 15 are cut in the outer and inner surfaces of the sleeve. Liquid flows from the pump casing through the aperture 17 and through the hole 9; the grooves 15, being few in number, only permit a small quantity to pass. A multiple worm 19 on a sleeve 18 rotates with the shaft and maintains a small pressure against the disc 8. If desired an external supply of liquid may be used. In the modification shown in Fig. 4 the disc 24 is fixed to the back of the impeller 23, and inner and outer sleeves 27, 25 are pressed against the disc by springs. Passages 31, 32 are made in the disc as shown.
Patent GB-867437-A (GB)
Title: Improvements in or relating to battery terminals
IPC: H01R11/28
Filed: 1959-11-16
Abstract: 867,437. Cable terminals. ENGLAND, H. O. Nov. 16, 1959 (Nov. 27, 1958], No. 38753/59. Class 38 (1). The electrical and mechanical connection between a battery post 2 and a terminal member 3 is improved by a screw 13 which engages in . a tapered and threaded drilling 8 made in the terminal member. After placing the terminal member on the post 2, the screw 13 is screwed into the drilling 8, and the threads of the screw cut serrations in the post. The screw is attached to the end 7 of a cable by a flexible link 15.
Patent GB-1055253-A (GB)
Title: Improvemetns in or relating to 19-nor-9-ß,10-a-pregnane compounds
IPC: C07J5/00
Filed: 1963-10-03
Abstract: The invention comprises 19-nor-9b ,10a -pregnenes of the formulae <FORM:1055253/C2/1> <FORM:1055253/C2/2> <FORM:1055253/C2/3> <FORM:1055253/C2/4> <FORM:1055253/C2/5> wherein R and R1 are each hydrogen or acyl; X is hydrogen or methyl; P is hydrogen or C1- 8 alkyl; Q is hydrogen or alkyl, aryl or aralkyl of at most 8 carbon atoms; R2 is hydroxy, hydroxy or acyloxy; R3 is hydrogen, a - or b -methyl, a -hydroxy or a -acyloxy; or R2 and R3 together are -O.C.(P.Q)O-; Y is chlorine or fluorine; X1 is hydrogen, methyl, fluorine or chlorine; Y1 is fluorine or chlorine; and Y2 is hydrogen, chlorine or fluorine; the acyl radicals being derived from hydrocarbon carboxylic acids of at most 12 carbon atoms which may be substituted.  The 16-hydroxy compounds are prepared by microbiological oxidation of the corresponding 16-unsubstituted compounds with the micro-organism Streptomyces roseochromogenus. The 16,17-diols obtained may be mono- or di-acylated by standard procedures or they may be reacted with aldehydes or ketones to give the corresponding 16a ,17a -cyclic acetals or ketals.  The 21-unsubstituted-D 4-6-halo compounds are prepared by converting the corresponding 6-unsubstituted compounds to 3-enol ethers by reaction with ethyl orthoformate and then reacting these with N-chlorosuccinimide or perchloryl fluoride to give 6b -chloro and 6b -fluoro derivatives respectively, which are isomerized to the required 6a -chloro and 6a -fluoro compounds by acid treatment.  The 21-halo compounds are prepared from the corresponding 21-unsubstituted compounds by conversion to the 21-iodo compounds by standard procedures and then reaction of these either with silver fluoride in aqueous acetonitrile or with potassium fluoride in dimethylformamide to give the 21-fluoro compounds, or reaction with lithium chloride in dimethylformamide to give the 21-chloro compounds.  The D 4,6-compounds are obtained from the corresponding D 4-compounds by dehydrogenation, preferably with a quinone having an oxidation-reduction potential of less than - 0.5v.  Examples are given.  The steroids of the invention, which are stated to be potent progestational agents with high oral activity, may be made up into pharmaceutical compositions with suitable carriers.
Patent GB-1151268-A (GB)
Title: Apparatus for Treating Web Material with a Treating Fluid
Inventor: MACOMSON WISTAR WRIGHT
IPC: D06B3/20
Filed: 1966-09-01
Abstract: 1,151,268. Textile treating apparatus. W. W. MACOMSON. 1 Sept., 1966, No. 39160/66. Heading D1L. Apparatus for the fluid treatment of web material comprises a tank 12 containing a treating fluid maintained at a predetermined level, means guiding the web W in a predetermined path through the tank and treating fluid, and spraying means 32 disposed' within the tank; the spraying means comprises a housing partially disposed within the fluid and having an inlet below the fluid level and an outlet above the fluid level, the outlet having associated therewith nozzle means 83 directing treating fluid towards the path of the web W, and of a length corresponding to the web width, impeller means 41 being provided within the said housing to discharge fluid through the outlet. The nozzle means 83 comprises a pair of elongate plates pivotally mounted on the housing of the spraying means on opposite sides of the outlet, the direction of flow and the width of the nozzle opening thereby being variable. The effective length of the nozzle opening is variable by means of baffle plates pivotally mounted at opposite ends of the opening, the baffle plates being movable between covering and uncovering positions. The impeller preferably comprises a centrifugal impeller including a shaft and radially directed curved vanes, the speed of rotation of the impeller being variable. The means guiding the web into and out of the tank preferably consist of guide rolls 23, 25, 26 and 30, the web following a substantially vertical path into and out of the tank. In a preferred embodiment, a pair of spray means is arranged at the entry and at the exit of the web relative to the treating fluid in the tank 12, the spray means being directed towards opposite faces of the web. In the preferred embodiment, a baffle plate 20 is provided within the tank forming separate treatment chambers 12a and 12b.