baber/WOPTO huggingface dataset:
Patent GB-1435467-A (GB)
Title: Method of producing silicon nitride articles
IPC: C04B35/591
Filed: 1974-04-10
Abstract: 1435467 Silicon nitride articles PLESSEY CO Ltd 16 Jan 1975 [10 April 1974] 16021/74 Heading C1A [Also in Division C7] Silicon nitride articles are prepared by a method which includes the steps of providing a dense silicon nitride compact, forming the compact into a desired shape, providing a silicon powder and mixing it with a binding agent, forming the mixture round the dense Si 3 N 4  compact to form a silicon powder compacted layer around the dense Si 3 N 4  compact, and at least partially nitriding the silicon powder compacted layer. The Si powder preferably has a particle size not greater than 200 British Standard mesh and is mixed with 15% by weight of the binding agent. The partially nitrided compacted Si powder layer may be shaped and then completely nitrided. Shaping may be by grinding or hot forging.
Patent GB-144114-A (GB)
Title: Improvements in hand coverings, particularly mittens
IPC: A41D19/01
Filed: 1919-06-25
Abstract: 144,114. Kreamer, E. M. June 25, 1919. Mittens.-In handcoverings, particularly having a transverse slit 8 for protusion of the wearer's fingers, the overlapping portions 5, 6 forming the slit are united at their ends 7 to prevent reversal of these portions.
Patent GB-889645-A (GB)
Title: Process for the manufacture of vinyl polymers
IPC: C08F14/06
Filed: 1959-05-11
Abstract: A process for preparing vinyl chloride homopolymers or copolymers with mono-unsaturated comonomers in aqueous suspension is effected in a first stage to not more than 50% conversion whereupon the temperature is lowered by between 5 DEG  and 35 DEG C. and the polymerization completed.  The first stage temperature is preferably 45 DEG  to 65 DEG C.  The process is particularly applicable to the preparation of polymers having a low K-value of about 70. Comonomers specified are vinyl acetate, propionate, butyrate; and lfiauate; vinylidene chloride; acrylonitrileethyl acrylate; methyl methacrylate and alpha chloracrylate; maleic and fumaric acids; and diethyl maleate and fumarate.  Examples describe the preparation of (i) polyvinyl chloride having a K-value of 70 and bulk density of 0,49 g./c.c. using methyl cellulose as protective colloid and dilauryl peroxide as catalyst; (ii) and (iii) copolymers of vinyl chloride and vinyl laurate or acetate using polyvinyl alcohol as protective colloid.
Patent GB-1361377-A (GB)
Title: Battery with solid electrolyte material
IPC: H01M6/18
Filed: 1973-04-04
Abstract: 1361377 Battery electrolytes PR MALLORY &CO Inc 4 April 1973 [20 April 1972] 16169/73 Heading H1B An electrochemical cell has a solid electrolyte comprising one or more anhydrous alkali metal hydroxides. It is stated that the conductivity of the electrolyte may be enhanced by (unspecified) doping. Lithium, sodium, and potassium hydroxides and the composition KOH.2LiOH are mentioned. The cell anode may be a pure metal or the metal mixed with the electrolyte. Suitable groups of metals are represented by the following specified materials:- K, Na, Rb, Cs, Mg, Ca, Sr, Ba, Zn, Cd, Hg, Mn, Fe, La, and Ce. Suitable cathode materials, which may be mixed with the electrolyte and/or with an electronic conductor such as graphite, are metal halides, metal oxides, halogens, halogenliberators, and oxygen-liberators. Mentioned are "silver halides", "copper halides", "lead halides", PbO 2 , HgO 2 , Br 2 , I 2 , (CH 3 ) 4 NI 3 , (C 2 H 5 ) 4 NI 3 , benzidine-iodine complexes (the use of benzidine is controlled by the Carcinogenic Substances Regulations, 1967.), and tetrathiotetracene-chloranil complexes. A specified cell has a disc anode of potassium, an electrolyte of anhydrous potassium hydroxide, and a cathode mixture of mercuric oxide, potassium hydroxide, and graphite.
Patent GB-612650-A (GB)
Title: Improvements relating to bows for violins and other stringed instruments
IPC: G10D3/16
Filed: 1946-05-28
Abstract: 612,650. Violin bows. ACCLES & POLLOCK, Ltd., and ATTWOOD, P. G. May 28, 1946, No. 16214. Drawings to Specification. [Class 88 (ii)] A staff of a bow for violins or other stringed instruments consists of a metal tube packed or lined with sound-absorbent material in order to damp undesired resonances.
Patent GB-551572-A (GB)
Title: Improvements in variable resistance devices
IPC: H01C10/32
Filed: 1941-12-16
Abstract: 551,572. Variable resistances. MALLORY & CO., Inc., P. R. Dec. 16, 1941, No. 16243. Convention date, Dec. 4, 1940. [Class 37] A variable resistor, suitable for volume control in radio sets, comprises a base plate 10 carrying a flat insulating ring 11 with a surface 12 of carbon paint, the ring and surface forming a nearly-complete circle and having silver paint on the ends to provide terminal connections for engagement by bent-over ends of terminal lugs 22,. 23. In the gap between the ends of ring 11 is a further terminal 26 which extends through the base 10 and forms a ring 27 surrounding the shaft 16, lugs 28 on the ring 27 serving to space it from base 10. An intermediate tap on surface 12 is provided by an arcuate strip of silver paint 25 connected to surface 12 by a suitably-placed silver paint bridge and engaged by the lug of a further terminal 24. Shaft 16 has a reduced and sectioned end 18 clamping an insulating plate 20 and stiffener 21. Riveted at 30 to the plate 20 is a ring-like contact, carrier 29 apertured at 34 to receive a cylindrical movable contact 31 located by the bent-over end 35 of plate 21 and adapted to slide on surface 12. Ring 27 is engaged by the ends 33 of a pair of arms 32 integral with spring ring 29, Fig. 3. In order to hold the plate 20 in position to exert the necessary pressure on spring ring 29, the plate 21 is adapted to serve as a stiffener and apertured at 36 to receive the extension 38 of plate 20, the part 37 of plate 21 being offset, Fig. 1, so as to lie on the opposite side of plate 20. Plate 21 also has a travel-limiting stop 46 engageable with a bent-in part 45 of casing 40, and a part 47 adapted to operate a snap-action A.C. switch which can be mounted on the back of the casing 40. The latter is for this purpose apertured at 41 and normally closed by a cover 42 having hooks 43 engaging the edges of the aperture and a spring tongue 44. The casing has lugs, Fig. 2 (not shown), engaging over the locking plate 15 of the bushing 14 of the' shaft 16 and further lugs for locating the device on a panel.
Patent GB-367667-A (GB)
Title: Free-wheeling units for change speed transmissions
IPC: F16D41/20
Filed: 1931-06-04
Abstract: 367,667. One-way clutches ; changespeed gearing. BRETTELL, F. G., 59, Chancery Lane, London.-(L. G. S. Devices Corporation ; Indianapolis, Indiana, U.S.A.) June 4, 1931, No. 16261. [Class 80 (ii).] A one-way clutch suitable for use as an isolating clutch for change-speed gearing upon a vehicle comprises cup-shaped driving and driven members 25, 31, Figs. 1 and 8, which contain a one-way grip spring 56 and are formed externally with teeth 26, 33 so that a positive locking connection may be effected by a sliding clutch sleeve 46. In Fig. 1, the cup member 31 is fast on a propeller shaft 29 the front end of which is supported in the driven shaft 7 of a conventional gear box 2, the shaft 7 carrying the cup member 25. To disable the one-way clutch as when the engine is used for braking, or in reversed drive, the sleeve 46 is slid to the rear by a lever 50 which passes up through a spring-pressed oil-retaining washer 55 and through the floor 54 of the vehicle. The clutch spring 56 is preferably secured at one end 58 to the cup 31 and presents a flat loose end to the other cup, preferably with means to facilitate the initial grip of this loose end upon which the grip of the other coils is built. The loose end may consist of coils 57, Fig. 5, of lighter section but of larger over-all diameter so as always to be in residual engagement with the hollow of the cup 25. Alternatively, as shown in Figs. 7 and 8, the flexibility of the loose end, or of both ends, of the coil 56 may be increased by tapering saw-cuts 61, 63 across the windings parallel to the coil axis. The initial grip may further be obtained by coning the cup 25 over the loose end as shown at 62, Fig. 8.
Patent GB-582862-A (GB)
Title: Improvements in the manufacture of reinforced concrete articles
IPC: B28B23/04
Filed: 1944-08-28
Abstract: 582,862. Pre-stressed reinforced concrete articles. DOWSETT ENGINEERING CONSTRUCTION, Ltd., and BARBER, R. S. V. Aug. 28, 1944, No. 16343. [Classes 20 (iv) and 107] In the production of pre-stressed reinforced concrete articles, two or more layers are separately cast round reinforcing wires held in a state of tension and the layers are then joined together with the reinforcements running in different directions. Alternatively, after the the first layer has hardened, the second may be cast on to it. An example is described with reference to the construction of man-hole covers. The moulds, wire-tensioning devices and general layout of the plant are as described in Specifications 572,385, 572,387, 572,390 and 572,391, [all in Group V]. The man-hole covers consist of two horizontal layers, square in plan and differing in size, with their tensioning wires running in different directions. Specification 572,388, [Group V], also is referred to.
Patent GB-244006-A (GB)
Title: Improvements in or relating to stop valves
IPC: F16K3/18
Filed: 1925-06-24
Abstract: 244,006. Bottner, A., (Assignee of Polte- [Firm of]). April 21, 1925, [Convention date]. Addition to 232,524. Sliding valves; wedging or jamming. - The parallel slide stop valve of the parent Specification is modified by connecting the eccentric bodies 2, 4, 5, Fig. 1, to the valve spindle 1 by a lost-motion device, such as keys 10 and arcuate grooves 11, Figs. 2 and 8, the initial free rotation of the valve spindle being utilized for operating a bye-pass valve device 13 to give a small advance flow for balancing the pressures on opposite sides of the valve, warming up the pipe, and facilitating the opening of the valve. The rectangular supporting-frames 12 of the bye-pass valves 13 are traversed and operated by a flattened portion of the valve spindle.
Patent GB-419541-A (GB)
Title: Improvements in or relating to spray jets and nozzles, more particularly for viscousliquids
IPC: B05B1/34
Filed: 1933-06-07
Abstract: 419,541. Spray-producers ; nozzles. ALLEN, J. W., 345, Gray's Inn Road, London. June 7, 1933, No. 16381. [Class 69 (iii).] A spray nozzle more particularly for viscous liquids of the kind in which liquid is admitted through a tangential passage 16 into a conical whirl chamber 17 having an externally recessed outlet 19 is provided with an axial pin having a sharply tapered part 22 and less tapered part 23. The pin is screwed at 20 to permit adjustment. The preferred angles of the internal chamber 17 is 60‹, the external recess 19, 125‹, the point 22 of the pin, 55‹, and the shaft 23, 5‹.
Patent GB-1103673-A (GB)
Title: Vehicle for transporting material in bulk
Inventor: ATKINSON RICHARD LESLIE
IPC: B60P1/38
Filed: 1965-04-15
Abstract: 1,103,673. Weighing apparatus. ATKINSON'S OF CLITHEROE Ltd. April 14, 1966 [April 15, 1965], No. 16403/65. Heading G1W. A vehicle for transporting material such as coal comprises a hopper 10 mounted on and arranged to move relatively to a chassis 14 so that when material is being discharged through an outlet in the rear of the hopper by a conveyer 12 forming the floor of the hopper the weight of material remaining within the hopper 10 is continuously indicated on an indicator having a member interposed between the hopper and the chassis. The member may be a hydrostatic load cell 19 connected by a flexible tube 20 to a dial gauge (21) Fig. 2 (not shown). The hopper 10 may be mounted on the chassis 14 by a lever system comprising four levers 16, two on each side of the hopper and each pivotally connected to an associated trunnion 17 supported on the chassis 14. The two levers on one side of the hopper are connected at one of their ends to their associated trunnions 17 and at the other of their ends to cradles 15 on which the hopper is mounted. The two levers on the other side of the hopper are connected at one of their ends to their associated trunnions 17 and their other ends are connected together by a link 18. The outlet is closeable by a sliding gate (11) Fig. 3 (not shown) and may be connected to a pneumatic or gravity discharging means or to a rotary valve. The hopper 10 is provided with a mechanically or hydraulically operated gate 22 which prevents further material being discharged from the conveyer 12 when a required quantity has been discharged from the hopper.
Patent GB-485131-A (GB)
Title: Device for actuating automatic telephone dials
IPC: H04M1/23
Filed: 1937-06-14
Abstract: 485,131. Dialling - devices. EPHRAIMSON, E. June 14, 1937, No. 16435. Convention date, Oct. 10, 1936. [Class 40 (iv)] A dialling-stick which at one end may be formed as a finger stall or may be provided with a surface for carrying advertising matter and may have means for hanging it up is provided at the other end with a groove or projection to make its slipping out of the linger-holes more difficult.
Patent GB-152079-A (GB)
Title: Improvements in or relating to fountain pens
IPC: B43K5/06
Filed: 1919-07-02
Abstract: 152,079. Davis, M. D. July 2, 1919. Reservoir pens.-In a reservoir pen of the type in which a piston is reciprocated in filling, the piston is located in the cap adapted as usual to fit either end of the barrel. The body a, Fig. 3 of the pen is provided at its rear end with a recess into which screws a plug c formed with one or more holes c<1> extending diagonally from the bottom to a position just below the head c<2>, so that by unscrewing the plug c communication between the air and the recess in the barrel is obtained. The bottom a<3> of this recess communicates with the reservoir, and provides a seating for a valve e consisting of a flat disk of india-rubber or the like held in position by perforated rings f. The disk is provided with one or more slits which are normally closed but which open under pressure. The cap p, Fig. 6, carries a piston r to which is attached a rod s pivoted in order to fold down outside the cap, and provided with a clip v to secure it in position. In filling, the plug c is unscrewed to uncover the holes c<1>, the cap p is screwed on to the rear end of the barrel and the piston reciprocated. Instead of the holes c', grooves may be formed in the periphery of the cap to act in a similar way.
Patent GB-612598-A (GB)
Title: Improvements in wireless aerial systems
IPC: G01S1/02
Filed: 1946-05-31
Abstract: 612,598. Aerials. BOHM, O. M., and WRIGHT, C. S. May 31, 1946, No. 16611. [Class 40 (vii)] A directive aerial system comprises a waveguide-fed mirror reflector and, to effect small adjustments of the directivity of the system, an angularly movable vane situated within the mouth of the wave-guide and rotatable about an axis perpendicular to the direction of wave propagation and to the electric vector of the wave. In a radar system as illustrated, where the exploring wave is radiated from the cheese aerial 1, and the echo signals are received by the cheese aerial 4 wherein the two horns 5 are rendered alternately operative by the switch 7 to provide beam switching, the re-radiation occurring from the blocked to the conducting horn produces a frequency-dependent shift in the directivity of the system. To counteract this effect, vanes mounted on a vertical axis with their planes substantially normal to the wave-guide mouth are situated in both of the horns 5. The vanes, which may be adjusted independently, are normally coupled together through suitable gearing so that simultaneous adjustments may be made in each guide, Fig. 2 (not shown). The spindle which comprises the axis of each vane may be made such that it acts as an impedance matching device to com. pensate for any mismatch occurring at the open mouth of the guide. The invention is also applicable to systems, using a single wave. guide horn, which it is desired to line up with an optical line of sight, as, for example, in gunnery control apparatus.
Patent GB-271669-A (GB)
Title: Improvements in or connected with jigging mechanism and troughing of conveyers
IPC: E21F13/06
Filed: 1926-07-03
Abstract: 271,669. Mavor & Coulson, Ltd., and Dey, G. July 3, 1926. Jigging conveyers.-The trough C of a jigging conveyer is supported by a member B which projects from a member A mounted on skids 2 and carrying the driving gear. The member B can be turned about pivots 13 which are coaxial with the bevel gear 9 of the driving mechanism. The trough C is supported by arms 3, 4 mounted in brackets on the underside of the member B. The arm 4 is connected by a rod 7 to a crank 6 which is driven through a bevel gear 8 by the gear 9. A bevel gear 10 meshing with the gear 9 is driving through gearing 11 by a sprocket 12. The conveyer may be used in conjunction with the feeder described in Specification 262,881.
Patent GB-1279611-A (GB)
Title: Improvements in circuit arrangements
Inventor: GURRY GEORGE WILLIAM
IPC: G01P1/10
Filed: 1968-07-01
Abstract: 1279611 Toys G W GURRY and B McCARTHY 20 June 1969 [1 July 1968 30 Aug 1968 2 Dec 1968 31 March 1969] 31388/68 41607/68 57180/68 and 16835/69 Heading A6S [Also in Divisions G1 and H3] A circuit for comparing the period of an input signal with a fixed time period to produce an output when the two time periods have a predetermined relationship is characterised in that the output is only produced after a number of successive comparisons has been made (see Division G1). In one form, command signals issued by two horns under the control of an operator are converted in a toy, e.g. a tank, into electrical signals actuating forward and reverse drive, start and stop, &c, the circuit being included in the tank control system.
Patent GB-118518-A (GB)
Title: Improvements in connection with Hydraulic Shearing and like Presses.
IPC: B21J9/12
Filed: 1917-11-16
Abstract: 118,518. Stewart & Co., D., and Holmes, T. E. Nov. 16, 1917. Shearing.-An hydraulically-operated shearing- press or the like of the kind in which the work is carried by a rising and falling table is constructed so that the table is lowered, not by the pressure on the work, but by a mechanical connexion with a moving member of the press. A lost-motion device forms part of this connexion to enable the shearing-blade to be moved relatively to the work. A clutch is also provided between this mechanical connexion and the table-lowering gear, this clutch being controlled by a ram operated by a cylinder in communication with the main ram of the press. As shown, the work-table B is supported by adjustable arms A<3> of a parallel-motion link system comprising lever arms A<2>, A<5> connected by links A' all controlled from a shaft A, which is connected by a link C to a counterbalancing hydraulic ram C<1> in a cylinder C<2>. The shaft A is rocked to lower the table B by means of a link D<7> connected to the moving head D<8> of the press and operating a lever D<4> on a counterbalanced shaft D<5> by means of a slot D<6>, and a pin on the lever D<4>. The shaft D<5> transmits motion by means of a link D<3> and a freely-mounted clutch element D<1>, Fig. 2, to the shaft A, the movable element D<2> of the clutch being operated to close the clutch by a lever E operated by a ram E<4> of a cylinder E<5> supplied from the main intensifier supply to the press through a pipe E<8> and non- return valve E<7>. When it is required to hold the table in its lowered position for a certain time, the pressure is maintained in the cylinder E<5> until the main hand-lever of the machine reaches a predetermined position, whereupon it is caused to operate by means of a link G<3>, lever G<4>, and link G<5>, a valve G<1> which connects the cylinder E<5> to exhaust, the clutch D', D<2> being then unclutched and a valve H opened by means of a link and lever system H<2>, H<3> with a lost motion. The valve H admits water from the accumulator to the cylinder C<2> and thereby raises the table to normal position.
Patent GB-1210706-A (GB)
Title: Measurement of the yield value of a liquid
Inventor: BATCHELOR JOHN
IPC: G01N11/10
Filed: 1968-04-09
Abstract: 1,210,706. Measuring rheological properties. BRITISH PETROLEUM CO. Ltd. April 29, 1969 [April 9, 1968], No. 16942/68. Heading G1S. Apparatus to determine the yield value or the amount of shear stress a liquid may withstand without deformation comprises, a thermostatic bath 20 holding a tube 22 containing a sample liquid 19 and a thermometer 21, a thin flat plate or drag detector 10 attached by rod 12 to a balance 11, and a permanent magnet 15 which is attracted by a solenoid 16 energized through an ammeter 18, which meter indicates the current necessary to cause initial movement of the detector 10 and may be marked in yield values. The apparatus may also be used to measure the temperature at which the yield value achieves a specific value by first cooling the liquid and then adjusting the ammeter 18 to read for the particular value required. The temperature is then raised and as soon as the magnet 15 moves the thermometer 21 is read.
Patent GB-1497366-A (GB)
Title: Solenoid actuating assembly
IPC: H01F7/16
Filed: 1976-04-27
Abstract: 1497366 Electromagnets MAC VALVES Inc 27 April 1976 [31 Dec 1975] 17038/76 Heading H1P [Also in Division F2] A solenoid assembly operates a 3-way reversing valve 11 wherein a poppet stem 12 is mounted in a bore 13 of body 14 and includes an inlet port 15 communicating through bore 13 with outlet port 16. The stem 12 is normally biased upwards by spring 17 to interrupt flow between ports 15, 16 and connect the latter to an exhaust port (not shown). The solenoid deflects stem 12 downwards to connect ports 15, 16 and interrupt flow to the exhaust. A rectangular cross-section cover 18 is telescopically mounted over the solenoid assembly which includes a magnetizable C-frame with a bight 20 and side legs 21 to which a ground wire 22 is screwed at 24 (Fig. 4). A flanged non-magnetic bush 26 is inserted in bore 25 of bight 20 to seat against its inner face, and a magnetizable cylindrical plunger 29 has body portion 30 and reduced end portion 31 sliding in bush 26, with a shading coil 33 mounted in the inner end of body 30. A tubular non-magnetic core guide 34 of, e.g. stainless steel is mounted over plunger 29, and a coil assembly 36 has axial bore 37 slidable over guide 34 with a working clearance, and is plastic encapsulated to leave diametrically disposed integral projections at each end seating in notches 39 of the frame plate and of a magnetizable flux plate 47, with an aperture 46 in which a non-magnetic flanged bush 44 is seated to slidably embrace the reduced diameter 42 of a magnetizable polepiece 40. The latter is spring biased at 52 and its body 41 is slidable in guide 34. Legs 21 are lowered inwardly to retain flux plate 47, whose ends are rotated at 50 to receive projections of the legs in a snap fit. An extension 53 abutting plunger 29 extends through a bore of polepiece 40 to engage poppet stem 12. Cover 18 is screwed in position at 55 and retains a spring 57 biasing solenoid 19 into position against valve body 12, while a push button 59 operating through a resilient seal 60 of the cover acts on plunger 29. In operation the de-energized position is as shown in Fig. 1. On energization plunger 10 moves downward against spring 17 to deflect stem 12, and polepiece 40 moves upwardly to meet and lock magnetically to the plunger, and on de-energization spring 17 restores stem 12. Guide 34 is in floating alignment with plunger 29 and polepiece 40 to discourage vibratory noise, and the coil assembly is fixed to the supporting frame.