baber/WOPTO huggingface dataset:
Patent GB-640918-A (GB)
Title: Device for the measurement of voltage-impulses of short duration
IPC: G01R15/00
Filed: 1947-04-03
Abstract: 640,918. Voltage measurements. HAEFELY & CO., Ltd., E. April 3, 1947, No. 9137. Convention date, Oct. 29, 1946. [Class 37] For measuring voltage impulses of short duration, from 0.1 to 1000 Ás, a condenser is charged by means of a diode so that its voltage lasts longer than the impulse voltage to be measured and is therefore more easily measured. As shown in Fig. 1, a condenser C discharges through a spark gap F and a resistance R, the voltage u across which is to be measured. This voltage charges a condenser Co, of smaller capacitance than the condenser C, through a diode I, the voltage Uo across the condenser Co being measured by a high resistance voltmeter V or by an electrostatic voltmeter, Braun tube, or ballistic galvanometer. Since the voltage drop across the valve I is small, the voltage Uo is approximately equal to the peak value of the voltage U. For measuring high voltages a capacitative voltage divider may be employed as shown in Fig. 3, a series of condensers C1 being connected in series with the condenser C2 across which the voltage is measured. The voltage across the condenser C2 charges two condensers Co1, Co2 through oppositely connected diodes I1, I2, so that both polarities of the voltage impulses may be measured on voltmeters V1, V2. In the arrangement shown in Fig. 4 the condenser C2 is short-circuited by a diode I1, for one direction of current, but receives a charge in the opposite direction, the voltage due to which is measured by the voltmeter V. The rise of voltage is measured at the increase, or front, of the impulse in the arrangements shown in Figs. 1 and 3 and at the decrease or tail of the impulse as shown in Fig. 4. Fig. 7 shows a circuit for measuring simultaneously the rise, or front, and fall, or tail of the voltage. A large condenser Ck is connected in series with the diode I1, its charge being measured by a ballistic galvanometer B. This is a measure of the front of the voltage impulse. The tail of the impulse subsequently causes charging of the divider condenser C2, the voltage of which is measured by a high resistance voltmeter V. By the addition of a second diode as at I2, Fig. 3, and a small reservoir condenser Co2 to the circuit of Fig. 7, the greatest difference between positive and negative extreme values of voltage during a voltage impulse can be measured.
Patent GB-976734-A (GB)
Title: Improvements in or relating to measuring devices for drilling and like machines
Inventor: ROONEY JAMES FRANCIS
IPC: G01B7/00
Filed: 1962-03-09
Abstract: 976, 734. Electric selective signalling. G. & D. DONALDSON Ltd. June 10, 1963 [March 9, 1962], No. 9156/62. Heading G4H. In apparatus for measuring the distance travelled by an elongated member 12, the leading end of the member contacts a probe 17 carried by a trolley 16 movable on a runway 13, a first electrical repeater unit 23 (e.g. a Selsyn) carried by the trolley 16 being driven from a pinion 21 in mesh with a rack (e.g. a chain) 20 in the runway 13 to control the angular position of a shaft 85 by means of a second electrical repeater unit 25 (e.g. a Selsyn), the shaft setting a digital electro-mechanical indicator 26. By means of a motor 82, magnetic clutch 83 and chain 84, the trolley 16 can be motored (adjustable speed) along the runway 13 using the repeater units 23, 25, to place it in some datum position, a magnetic clutch 80 being disengaged so that indicator 26 is not driven. The indicator 26 itself may be zeroed by a manual control 92. The clutch 80 may not be re-engaged until the indicator 26 and trolley 16 are both in "datum positions". Motor 82 &c. also enables the trolley 16 to be urged backwards against member 12 during feeding of member 12, so that the two always remain in contact. Shaft 85 drives an indicator drum 50 to display sixteenths of an inch and also six wipers, three of which each select one out of ten lamps to project a numeral on a screen (75a, 76a, 77a) to indicate feet and inches. The remaining three wipers are used to prevent more than one lamp'per set of ten being energized at a time. The shaft 23a of the first repeater unit 23 can be adjusted by a rack and pinion arrangement 31, 32 actuated by a follower 33 contacting a cam plate or plates 34 associated with the runway 13, to compensate for wear. The elongated member 12 may be a girder or beam carried on a conveyer 11 past a drilling, boring or sawing station 10. A lamp 30 is provided to indicate when the member 12 is in contact with the probe 17.
Patent GB-472660-A (GB)
Title: Improvements in projecting apparatus with two picture projectors
IPC: G03B21/00
Filed: 1936-03-27
Abstract: 472,660. Optical-projection apparatus. GUNTHER, N. (Chaineux, E.) March 27, 1936, No. 9207. [Class 97 (i)] In apparatus comprising two projectors 4, 5 alternately projecting or to a mirror 2 and screen 3, the picture carrier for the projector 5 being an intermittently moved band 9, the light sources 6, 8 are alternately switched in and out under the control of cams 16, 17 angularly adjustable on a spindle 11 of the band feeding mechanism; each cam bears on one of two levers 19, 21 carrying mercury switches 23 in the lamp circuits, and may consist of two parts relatively displaceable to vary the effective length of its surface. The cams may each comprise members 17a, 17b, Fig. 3, adjustably secured by set-screws 24 to the spindle 11 and engaging an arm 20 extending from the lever The projector 4 may have a picture disc rotated by clockwork 7, and the spindle 11 may be driven by a, motor 12 and belt 15, or by hand.
Patent GB-398752-A (GB)
Title: Process for the production of zinc oxide
IPC: C22B19/34
Filed: 1933-03-27
Abstract: In a process for obtaining zinc oxide by burning a pulverulent mixture of zinciferous originating material with carboniferous fuel such as coal dust in burners of the coal dust type and precipitating the oxide from the cooled effluent gases, originating materials containing zinc sulphate, especially flue dust derived from the roasting of zinc ores, are employed, and excess of combustion air is avoided.  The effluent gases are cooled by a spray of water, thereby precipitating zinc oxide and oxidizing any metallic zinc present.
Patent GB-365879-A (GB)
Title: A new or improved machine for cleaning vegetable fibres
IPC: D01B1/24
Filed: 1930-03-26
Abstract: 365,879. Beating or cleaning vegetable fibres. TONSBEEK, T., 6, Kerkdwarslaan, De Bilt, Holland. March 26, 1931, No. 9233. [Class 120 (i).] Vegetable fibres are beaten and cleaned in a machine comprising a rotating drum 1, a casing surrounding the drum, blunt transverse ribs 2 on the drum, and an opening 3 in the casing so arranged with relation to the direction of rotation of the drum that, on inserting one end of a bundle of fibres through the opening, the fibres will be beaten in the space between the upper part of the drum and the casing. The projections 2 may be formed by giving the drum an undulating surface or by securing to it an element having such a surface, and projections 5 may be provided on the casing near the opening 3, those projections farthest from the opening being preferably nearest the drum. An outlet 4 for dust &c. is provided at the bottom of the casing. One end of the bundle of fibres being beaten is held by hand or in a mechanical device, or, to avoid turning the bundle, the middle is clamped in a mechanical conveyer and the ends successively beaten by two machines.
Patent GB-965874-A (GB)
Title: Improvements in and relating to pan type mixers
Inventor: COWLEY HAROLD RAYMOND
IPC: B28C5/16
Filed: 1963-03-08
Abstract: 965,874. Concrete mixers; stirrer assemblies. STOTHERT & PITT Ltd. March 8, 1963, No. 9295/63. Heading B1C. A mixing paddle support assembly for a pan type mixer comprises a support arm 1 having a bracket 2 carrying a mixing paddle 3, a bracket 4 attached to the drive means of the mixer, and a wear-resistant longitudinally split sleeve 5. The brackets 4, 5 have semicircular projections 6, 7 to retain the sleeve, which is prevented from rotating when in position by a locking key 8 passed through a slot in the projection 7 and secured by a bolt 10 to a radial flange 11 formed on the projection. The locking key engages in one of four slots formed by notches 9 in the sleeve sections, providing four positions of the sleeve. In operation the sleeve joint lies perpendicular to the direction of movement of the arm so that an unbroken face is presented to the mass of material.
Patent GB-470872-A (GB)
Title: Improvements in or relating to measuring devices or instruments
IPC: G01K17/16
Filed: 1936-03-30
Abstract: 470,872. Electric signalling systems. ELECTROFLO METERS CO., Ltd. (Republic Flow Meters, Inc.) March 30, 1936, No. 9342. [Class 40 (i)] A motor, running constantly between limits, is used to alter a characteristic of an electrical measuring circuit in accordance with alterations of a variable, the limits of movement of the motor being altered as the variable varies. The invention is used in a heat measuring circuit in which characteristics of a circuit vary with flow and with temperature difference between two points. The temperature at the two points controls the movement of the blades 156, 158, Fig. 2, connected to Bourdon tubes 160, 162 respectively, the blades moving the link 148 in accordance with temperature difference. The motor 50 is constantly running and, by means of cam 136, link 130, roller 128 and link 126 it moves the contact block 120 so that contact 112 makes contact with contacts 108 and 106 in turn. When contacts 108 and 112 make, relay 92 energizes and locks so that field coil 52 of the motor is effective and the shaft 38 carrying cam 136 and slotted arm 40 is rotated. The motor runs until contact 112 and 106 make to shut down relay 92 and energize field coil 54. The motor 50 reverses and runs in this direction until contacts 112 and 108 again make. The slot in the arm 40 on shaft 38 is of such a width that if the relative positions of blades 156 and 158 remain constant, the slotted arm 40 does not move the arm 24. If, however, the temperature difference alters, the link 148 is moved so that the limits of rotation of the motor are altered and the arm 40 engages the pin 42 and moves the arm 24 to adjust the tapping of the auto-transformer 30. Limit switches 84 prevent the motor overrunning. The auto-transformer 30 is in a circuit including fluid-flow meter 16, which alters resistance R in accordance with fluid-flow as is described in Specification 409,218, [Group XXXVI],- and indicating instrument 20 which indicates directly the consumption of heat.
Patent GB-542278-A (GB)
Title: Improvements in electric fires
IPC: F24C7/06
Filed: 1940-05-28
Abstract: 542,278. Electric heaters. FARISH, T. G. May 28, 1940, No. 9383. [Class 39 (iii)] In a reflector stove, the heating element b is supported by end brackets a secured  directly to the reflector c by porcelain or other insulating blocks d, e. A bracket passes through a slot in the block d and through a depending lug d' which fits into an aperture in the reflector. The base a<SP>1</SP> of the bracket is held in a recess in the block e behind the reflector, and the two blocks and the base of the bracket are secured to the reflector by a rivet or screw f.
Patent GB-1445820-A (GB)
Title: Vehicle seats
IPC: B60N2/07
Filed: 1974-03-02
Abstract: 1445820 Sliding seats with forwardly foldable backrests BRITISH LEYLAND UK Ltd 3 March 1975 [2 March 1974] 9516/74 Heading A4J Each side of the backrest of a slidably mounted vehicle seat is connected to a fixed bracket 5 through a rod 12 on the backrest engaging a slot 7 in the bracket, the position of the rod along the slot being adjustable to allow fore and aft positioning of the seat and the rod being locked in the adjusted position to allow forward sliding of the seat as the backrest is folded forwardly. A tooth 21 provided on a detent lever 20 pivoted on the rod engages one of a number of apertures 9 provided in the bracket 5 to hold the rod in position. Engagement of a latch 17 on the backrest with the seat frame holds the backrest in the unfolded position. A pin and slot connection 13, 14 between the backrest and the seat allows forward sliding of the seat as the backrest is folded forwardly.
Patent GB-1145771-A (GB)
Title: Electrical circuit boards
IPC: H05K3/46
Filed: 1966-03-04
Abstract: 1,145,771. Printed circuits. LITTON INDUSTRIES Inc. 4 March, 1966 [18 March, 1965], No. 9674/66. Heading H1R. In a multilayer circuit board in which a conductive circuit pattern is secured to one surface of an insulating substrate, connection is made to the circuit pattern by a solid metallic post electrolytically formed in a hole through the substrate; moreover, at least two such posts separated by at least one insulating layer extend in at least partial alignment within the multilayer board. As shown, Fig. id, apertures 13 are formed by a photo-etching process in the Cu cladding 12 on one surface of an insulating substrate 10 having such cladding 12, 12<SP>1</SP> on its opposite surfaces. Holes 18 are then etched in the substrate, which may be of epoxy-glass, in which case the etchant may be a mixture of HF and H 2 SO 4 . Cladding 12 is removed, and holes 18 are filled with metallic posts 20, Fig. 1h, formed by the electrodeposition of Cu on cladding 12<SP>1</SP>. The exposed surface of substrate 10 is coated with a layer 22 of Cu by electroless plating followed by a thicker layer 24 of electroplated Cu, which layers are photo-etched to form a pattern of conductors 26 and round pads 28 above posts 20; the pattern is given a coating 30 of Au. A layer of partially cured plastics material (32, Fig. li, not shown) is applied to the pattern-bearing surface of the substrate, and a second insulating substrate (34) clad with a single Cu laminate (36) is bonded thereon by heat and pressure. The steps for the formation of metallic posts and a conductive pattern are then repeated; and so on, for subsequent layers. When a multilayer circuit board has been produced, it is inverted so that cladding 12<SP>1</SP> is on top (Figs. 3, 3a, not shown), and the cladding is etched to form terminal pads (12<SP>1</SP>a) to which are connected the leads (38) of electronic modules (37), and mounting pads (12<SP>1</SP>b) on which the modules lie, and which are in contact with heat-conductive posts (54), formed through the substrate in accordance with the invention, which in turn are in heat-exchange contact with earthing layers (46, 52) on the other surface of the substrate.
Patent GB-1107315-A (GB)
Title: Rotary air moving fan
IPC: F04D29/34
Filed: 1967-03-01
Abstract: 1,107,315. Axial-flow fans. TORRINGTON MANUFACTURING CO. March 1, 1967 [April 18, 1966], No. 9706/67. Heading F1C. A fan impeller comprises arms 16 each formed with a pair of flanges 28 to which is riveted a fan blade 18. Between the flanges 28 and joined to them by transition sections 30 there is a web 26 which is spaced from the blade 18 to define therewith a radially extending channel 38. To balance the fan, one or more balance clips 20 of resilient material are slidably secured to one or more webs 26, each with a tab 52 engaging behind the outer edge 36 of a slot 34.
Patent GB-313242-A (GB)
Title: Improvements in or relating to the manufacture of silica and like gels
IPC: C01B33/154
Filed: 1928-03-30
Abstract: 313,242. Wade, H., (Silica Gel Corporation). March 30, 1928. Silica.-In preparing gels of silica, oxides of tin, titanium or tungsten, &c., the hydrogel is purified by treatment with acid, preferably strong sulphuric, nitric, or hydrochloric acids. In preparing silica gels, a hydrogel prepared for example as described in Specification 136,543 is either soaked in sulphuric acid of 60‹ Be. or is washed with sulphuric acid progressively increased in strength up to 60‹ Be. and then progressively diminished. The gel is washed with hot and cold water, and dried, for example, in a stream of air at 80-120‹ C. and further dried in vacuo. The gel may be activated at temperatures up to 870‹ C. Specifications 287,066 (as open to inspection under Sect. 91 (3) (a)) and 263,199 are referred to.
Patent GB-256665-A (GB)
Title: Improvements in or relating to submarine signalling apparatus
IPC: G01S1/72
Filed: 1925-04-14
Abstract: 256,665. Walker, W. L. April 14, 1925. Microphones. -. A submarine sound receiver comprises a heavy watertight housing and a removable diaphragm cell with a light diaphragm forming part of the wall of the housing and flush with the ship's plating; one or more microphones are mounted in the housing and are connected also to the diaphragm. Fig. 1 shows such a housing 2 2 enclosing two microphones 60, 61 connected by a lever 56, which is connected to the diaphragm 24 of the diaphragm cell or receiver 21. The housing 2 is generally cylindrical, with an extension 16, and is bolted by means of its flange 3, to the ship's plating 1, a lead bushing 1<b> and a gasket 8 being interposed. The inner flange 9 carries a cover 10, inside which is a block 14, and optionally a lining 15 of lead or other sound-deadening material. The diaphragm unit 21 is seated upon a rubber gasket 20<a>, and kept in place by a screw-threaded ring 26, a rubber gasket 29, and a thin metal ring or washer 29<a> all of which are coated with rubber latex before assembling. The diaphragm 24, the external pressure on which may be counterbalanced by internal pressure, has a boss 25 connected by a rod 64 to the lever 56, Fig. 5. This lever is mounted on a pivot consisting of two intertwisted wires 48, 49, Fig. 6, set axially in hollow plugs 36, 37 in the brackets 32, 33. The plugs are adjusted axially by nuts 46, 47, and guided by pins 40, 41, the ends of which are in grooves in the plugs. The looped ends of the wires 48, 49 contain pins 52, 53, which hold the pivot in place. The wires, as shown in Fig. 5, are disposed one on each side of the central part of the lever 56, and are secured by clamping-plates 57, 58. The lever is a channelsection member with perforations 67 to lighten it; these perforations may receive balancing- weights 68. Electric connections are brought in through apertures 18, Fig. 1. Specification 222,425 is referred to.
Patent GB-165952-A (GB)
Title: Improvements in molds for forming artificial teeth
IPC: A61C13/08
Filed: 1920-04-07
Abstract: 165,952. James, R. W., (White Dental Manufacturing Co., S. S.). April 7, 1920. Teeth, artificial. -Tooth - forming moulds consist of two portions 1, 2 forming the cavity between them, the lower part 1 having three inclined surfaces 6, 7, 8, forming the lingual surface of the tooth, and the upper part a concave surface 9 to form the lateral surface. Extending into the cavity is a web 11 having lateral flanges 10 which are arranged parallel to the " bite-" - forming surface, and inclined to the lateral surface. Alternatively the flanges may be parallel to the " ridge-lap " surface.
Patent GB-272824-A (GB)
Title: Improvements in truck-arresting devices for inclined railway tracks
IPC: B61K7/22
Filed: 1927-04-09
Abstract: 272,824. Nohse, R. July 17, 1926, [Convention date]. Axle stops comprising a trip lever 4 and a spring-controlled stop lever 6 have a buffer spring 10 engaging the short arm 8<1> of a lever 8 in contact with the stop lever 6. The lever 8 has a roller 7 bearing on an inclined surface on a crosspiece 11 between the parallel arms of the stop lever, the arms being spaced apart to pass the couplings of a truck.
Patent GB-611087-A (GB)
Title: Improvements in electric heating apparatus
IPC: F24H3/04
Filed: 1946-03-29
Abstract: 611,087. Electric air heaters. BANDIDT, A. F., ANGELL, J. W. P., and KENT ALLOYS, Ltd. March 29, 1946. No. 9889. [Class 39 (iii)] [Also in Group X] In an air-heating unit an electric motor 40, driving a fan 41, is disposed axially at one end of a cylinder 56 having at its outlet end an annular baffle 57 and a circular plate 60, air emerging radially therebetween, passing over coiled resistance elements 62 arranged on insulating bobbins 61 carried on pins extending between the baffle and the plate. This unit may be supported by means of a flanged plate 58 within a cast metal casing comprising 'two parts 34, 35, joined by a band 36, the casing having air inlet and outlet openings 54, 55, respectively. The bottom is closed by a plate 53, and a mushroom plate 63 is spaced from the top by struts 64 or by an annular plate (not shown). Specifications 3315/00 and 699/04, [both in Class 39], are referred to.
Patent GB-213440-A (GB)
Title: Improvements relating to brake mechanism for motor cycles, and the like
IPC: B62L3/00
Filed: 1923-04-12
Abstract: 213,440. Webb & Co., Ltd., H. C., and Atkinson, G. L. April 12, 1923. Wheels, facilitating detachment of.-In a brake for motor-cycles &c., wherein t h e stationary anchorage plate for the brake shoes &c. is mounted on the wheel spindle and has a sliding slit- and-projection connection with the forks or a part carried by them, the sliding connection of the slot a<2> in the arm a<1> of the anchorage plate a with the projection c carried by the forks d is extended sufficiently to enable its engagement to be effected prior to, and then simultaneously with, the sliding engagement of the wheel spindle b with openended slots d<1> in the forks. The assemblage of the anchorage plate is thus facilitated. The sliding connection between the parts a, d may also comprise two parallel ribs on the part a<1> engaging the pin c, two ribs on the forks engaging a parallel-sided extension of the arms a<1>, a single projection on the part a<1> engaging a slot in the cross-member carried by the forks, or a pin on one member entering a tubular member on the other.
Patent GB-327848-A (GB)
Title: Improvements in the manufacture of satin white
IPC: C09C1/40
Filed: 1929-03-28
Abstract: 327,848. Riley's Chemicals &. Colours, Ltd., and Riley, C. H. March 28, 1929. Pigments.-In the manufacture of satin-white by mixing together lime and aluminium sulphate, sodium sulphate is mixed with either the lime or aluminium sulphate prior to their being mixed together, or is added as they are being mixed together. The sodium sulphate may be in the anhydrous or crystalline form or in aqueous solution. The admixture of aluminium sulphate with sodium sulphate as a preliminary to the preparation of satin-white is claimed.
Patent GB-775988-A (GB)
Title: Improved method and apparatus for de-watering pulp or stock on a fourdrinier type paper or board making machine
Inventor: THOMAS REGINALD JAMES
IPC: D21F3/00
Filed: 1954-04-06
Abstract: 775,988. Fourdrinier paper- or board-making machines. ST. ANNE'S BOARD MILL CO., Ltd. March 29, 1955 [April 6, 1954; March 4, 1955], Nos. 9981/54 and 6509/55. Class 96. The invention of Specification 748,597, viz. the compression of fluid pulp on the wire-cloth 13 of a Fourdrinier paper- or board-making machine, as by one or more travelling, upper wire-cloths 18, is modified in that water passing through the upper wire-cloth is withdrawn by suction, e.g. from an assembly of suction boxes 24 pivoted at 25 and adjusted at 35, and optionally suction nozzles 48, and optionally also by the sloping blades up which the water runs due to its momentum, as disclosed in the said prior Specification. The first lower roll 19 of the upper wire-cloth 18 may be adjusted in height, and is located above a large table roll 38 which may be a suction roll. There may be a series of wet presses 40, 41 along the wire-cloth. Deckles 45 at the sides of the wire-cloth may have air jets along their lower sides.