baber/WOPTO huggingface dataset:
Patent GB-1048715-A (GB)
Title: Limit switch
IPC: H01H13/06
Filed: 1963-08-09
Abstract: 1,048,715. Switch bases; retractive switches. K. MAECKER. Aug. 9, 1963 [Aug. 10, 1962; Aug. 17, 1962], No. 31633/63. Heading H2B. A limit switch 1 having an actuating plunger 20 (Fig. 4, not shown) is mounted on a support 15 for limited longitudinal adjustment by means of a frame 6 (Fig. 3, not shown), which has bentout portions 9 and 10 to accommodate tongues 12 and 13 on a flat plate 11 which is attached to the switch housing by screws 14. The frame 6 is attached to support 15 by screws 16 passing through holes 17, and a screw 18 passing through a slot 5 in the switch housing and hole 19 in the frame. The plate 11 is thicker than the frame 6 such that when the screws 16 and 18 are slack the switch may slide for adjustment but when the screws are tightened the plate 11, and hence the switch, are firmly clamped in position. Instead of direct actuation on plunger 20 the switch may be operated by a roller 38 and cam 40 acting on a follower 24 (Figs. 8 to 11, not shown). A rubber cup-shaped seal engages a groove in push-rod 24 and a reinforcing edge 27 is-clamped to the housing 21 by a plate 31 (Fig. 6, not shown) or by the support 32 which carries the roller-cam arrangement (Fig. 8, not shown). A spring 47 restores the roller when it is released by operating member 41 (Fig. 11, not shown), and spring-loaded balls 44 co-operate with recesses at the sides of cam 40 to locate it in the neutral position.
Patent GB-933059-A (GB)
Title: Barium titanate dielectric
Inventor: BLOWERS GEORGE GIRDLEY
IPC: H01G4/12
Filed: 1960-09-14
Abstract: Alkaline earth, especially barium, titanate ceramic dielectrics are produced by firing the green ceramic body in an oxidizing atmosphere, e.g. air at 2300 DEG -2800 DEG F. until the dielectric constant is in the range 8000-10000 and then heating to 2300-2800 DEG F. for 10-80 minutes in a reducing atmosphere, e.g. hydrogen.  Ceramic bodies thus produced have dielectric constants in excess of 25000.  For the production of a capacitor circuit element, electrodes are formed on the reduced ceramic body by the application of metallic electrode compositions, e.g. a silver glaze.  The heated dielectric bodies are then fired in an oxidative atmosphere at 1400 DEG -1500 DEG F. for 1/2 -10 minutes when a controlled degree of reoxidation takes place. According to an example, a ceramic composition containing at least 50% by weight of barium titanate and the rest made up of strontium titanate and calcium zirconate was fired in a ceramic kiln on a 20 hour cycle with a maximum temperature of 2500 DEG F. maintained for 2 hours, then reduced for 1/2 hour at a temperature of 2400 DEG F. and reoxidized for one minute at a temperature of 1450 DEG F. Specification 664,370 is referred to.ALSO:Alkaline earth, especially barium, titanate ceramic dielectrics are produced by firing the green ceramic body in an oxidising atmosphere e.g. air at 2300-2800 DEG F until the dielectric constant is in the range 8000-10000 and then heating to 2300-2800 DEG F for 10-80 minutes in a reducing atmosphere e.g. hydrogen.  Ceramic bodies thus produced have dielectric constants in excess of 25000. For the production of a capacitor circuit element, electrodes are formed on a reduced ceramic disc by the application of metallic electrode compositions e.g. a silver glaze.  The heated dielectric discs are then fired in an oxidative atmosphere at 1400-1500 DEG F for 1/2 -10 minutes when a controlled degree of reoxidation takes place.  According to an example, a ceramic composition containing p  at least 50% by weight of barium titanate and the rest made up of strontium titanate and calcium zirconate was fired in a ceramic kiln on a 20 hour cycle with a maximum temperature of 2500 DEG F maintained for 2 hours, then reduced for 1/2 hour at a temperature of 2400 DEG F and reoxidized for one minute at a temperature of 1450 DEG F.  An epoxy resin may be applied after cooling.  Specification 664,370 is referred to.
Patent GB-680232-A (GB)
Title: A method of and means for producing and maintaining solutions with certain concentrations of solute for use in the growing of crystals of salts
IPC: C30B7/00
Filed: 1949-12-09
Abstract: <PICT:0680232/III/1> <PICT:0680232/III/2> <PICT:0680232/III/3> Solution from which material is to be crystallized is circulated between a chamber A, in which the solution is supersaturated and deposition on a seed crystal occurs, and a chamber C in which the solution is unsaturated and material from a supply E is dissolved, the circulation being maintained by density variations arising from temperature and concentration differences in the various parts of the apparatus, the solution being heated as it passes through a vertical channel between the chamber A and the upper part of chamber C and cooled in a vertical channel D between chamber C and the lower part of chamber A.  Dissolution of supply material in chamber C causes an increase in density of the solution and a temperature drop which further increases the density, causing a movement of the solution down the channel D into the base of chamber A.  The solution is further cooled during this movement by cooling fluid circulating in an adjacent space F.  Solution near the top of chamber A, which is less dense due to deposition of solute in this chamber, flows down channel Ba and up Bb extends down only to just below trolled by a thermostat 6 in chamber C.  The solution thus becomes less dense and unsaturated and dissolves supply material E.  The rate of circulation and solution of the supply material and hence the rate of deposition in chamber A is controlled by the setting of thermostat 6.  In the apparatus of Fig. 1 (not shown), the channel Ba is dispensed with and the wall 3 of channel Bb, extends down only to just below heater 4. In the apparatus of Fig. II the tendency to counter-flow due to the solution in channel D being warmer than that in chamber A, is partly compensated, enabling circulation to be maintained with very small concentration differences.  The Specification as open to inspection under Sect. 91, describes two further apparatus.  In Fig. III (Cancelled) there is no cooling space F and the channel D is modified to run first downwards, Da, then upwards, Db, and finally downwards, Dc, a heater being installed in the part Db.  The heat supplied may be sufficient to make the solution unsaturated, thus dissolving residual grains of solute, and to compensate for the heat lost by solution, the heater in channel B being dispensed with.  In Fig. IV (Cancelled), the dissolver chamber is a separate vessel and communicates with a plurality of crystallizer vessels A.  The heater is a resistance coil wound round the dissolver chamber which is insulated at 7, the arrangement of channels being similar to that in Fig. III (Cancelled).  This subject-matter does not appear in the Specification as accepted.
Patent GB-265739-A (GB)
Title: Improvements in holders for electric incandescent lamps
IPC: H01R33/46
Filed: 1925-12-16
Abstract: 265,739. Grant, W. E., and Bean, M. B. Dec. 16, 1925. Holders.-The contacts 15 are rigidly fixed in the insulating block, and the block is pressed down by a spring 31 to engage the contacts with the lamp bulb 33; the block is divided longitudinally into two parts 9, 10 having registering recesses 12, 14 to receive the leads and projections 19 in the recesses 12 to grip the leads, so that the block functions as a cord grip when the two parts are screwed together, and the block is guided and secured by lugs on it sliding in longitudinal slots in an inner sleeve 23 rotatable in the outer casing 27, while the pins 34 of the bulb cap engage in the slots to position the sleeve and in the usual bayonet slots in the outer casing 27. The casing 27 is pierced to form a metal tongue 39, and when the lower shade-ring 36 is screwed down it forces the tongue into engagement with the slot in the sleeve 23, thereby preventing removal of the lamp bulb. Specification 243,311 is referred to.
Patent GB-424707-A (GB)
Title: Improvements in and relating to compasses, bows and like instruments
IPC: B43L9/24
Filed: 1933-11-15
Abstract: 424,707. Drawing - compasses. HARRIS (BIRMINGHAM), Ltd., W. J., and COOK, F. G., 111, Whitmore Street, Birming- ham. Nov. 15, 1933, No. 31807. Drawings to Specification. [Class 97 (iii)] A self-propelling pencil is secured, e.g. by soldering, to one of the legs of a pair of compasses so that the lead may be easily set in relation to the point on the other leg.
Patent GB-160284-A (GB)
Title: Improvements in seam welding machines
IPC: B23K11/10
Filed: 1919-12-20
Abstract: 160,284. Cramer, F. A., and Marryat, H. Dec. 20, 1910. Welding.-In a spot-seam electric welding- machine of the type in which an intermittentlyrotated electrode mounted in a pivoted arm is moved into contact with the work by a mechanically-operated cam, the arm is operated by the cam through a lever mounted on a movably-supported pivot, which is moved by a pedal to bring the lever either into or out of contact with the cam. In the form shown in Fig. 1 in which the feed of the work is effected by hand while the electrode is out of contact with the work, the upper disc electrode 1 is carried by a pivoted arm 2 and rotated on raising the electrode after the current is cut off, by a ratchet-wheel 27 driven by a pawl 2a on an arm 25a which engages at one end a fixed bar 24<a>. The pedal 15, which is pivoted at 16 carries an arm 14 which forms a toggle with a link 13 carried by a pivot 9. The pivot is carried by a pair of arms 17 pivoted to the framing 18 and serves to support a lever 8 having at one end a roller 10 and connected at the other end to the spring-controlled rod 6 for operating the arm 2. On depressing the pedal, the toggle is straightened to bring the roller 10 into contact with a cam 11 on the driving-shaft 12. and the rod 6 is raised to move the electrode into contact with the work. In this movement a trip lever 30, Fig. 6 carried by the rod 6 engages a trip pin 34 on a spring-controlled lever 31, which is thus moved on its pivot 32 to bring its switch contact 35 against a fixed contact and so close the primary circuit of a transformer, the secondary terminals of which are connected to the arms 2, 5. Continued upward movement of the rod 6 brings the lever 30 against a stop 36 and separates the levers 30. 31 and so opens the switch, and at the same time extra pressure is applied to the work to ensure a perfect weld. In the machine shown in Fig. 3, the work is fed by the electrodes, the upper one of which is rotated secondary terminals of which are connected to by a cam on the shaft 12, engaging a lever 21, 25, the feed being effected after the current is switched off. If desired, separate power-driven rolls may be used to feed the work. The pedal is kept depressed until the seam is finished, a succession of spot welds being thus obtained.
Patent GB-785849-A (GB)
Title: Method of making structural form ties
IPC: B21F45/00
Filed: 1955-11-09
Abstract: 785,849. Shuttering ties. GATES, R. C. Nov. 9, 1955, No. 32050/55. Class 20(2) [Also in Group XXII] A method of making a form tie from a straight wire of a length approximately the length of the finished tie includes the steps of bending the ends 13 of the wire 10 into the form of hooks whose ends extend across the line of the wire, folding the wire about two points 14 which divide the original length of wire into three equal parts thus forming a bight 15 at each end, the bent portions that terminate in the hooks crossing each other, thereby positioning the hooks in the bights, the planes of the hooks being parallel and substantially perpendicular to the planes of the bights, and twisting all of that part between the hooks into a three strand cable. The ties, for holding together forms for casting concrete walls are described in U.S.A. Specification 1,692,166 to which reference is made.
Patent GB-666629-A (GB)
Title: Improvements in or relating to thiouracil compounds
Filed: 1949-12-14
Abstract: 6-Propyl-2-thiouracil is manufactured by reacting S-methylisothiourea (conveniently in the form of its sulphate) with a b -ketocaproic acid ester in the presence of a strong alkali (preferably sodium ethoxide), and demethylating the resulting 6-propyl-2-methylthiouracil by heating with at least the theoretical quantity of an alkali metal (e.g. potassium) hydrosulphide, preferably under superatmospheric pressure.  The condensation is preferably effected by allowing the reagents to stand together at room temperature in an anhydrous solvent (e.g. methyl or ethyl alcohols), and the 6-propyl-2-methylthiouracil may be isolated from the reaction mixture by dilution with water, filtration and acidification of the filtrate.  In an example, the starting material is the ethyl ester of b -ketocaproic acid.
Patent GB-181298-A (GB)
Title: Improvements relating to flue dampers
IPC: F23L13/00
Filed: 1921-12-01
Abstract: 181,298. Todd, I. Dec. 1, 1921. Dampers.-An opening 5 fitted with a cover 8 having projections 9, 10 engaging notches 6, 7, provides access through the cover 1 to the connection of the wire 3 and the damper 2.
Patent GB-646047-A (GB)
Title: Improvements in looms having stationary weft supplies
IPC: D03D47/00
Filed: 1947-12-05
Abstract: 646,047. Shuttleless looms. ZBROJOVKA BRNO NARODNI PODNIK., WERNER, V., and KUBELKA, K. Dec. 5, 1947, No. 3220. Convention date, Dec. 18, 1946. Addition to 643,741. [Class 142(ii)] In a loom having a stationary weft supply and in which the weft is introduced by a carrier on a flexible band, always from one and the same side of the warp, a driving shaft of the mechanism driving the flexible band also constitutes the axis about which the slay pivots. The slay 1 is driven from the shaft 2 by a crank 3 and connecting rod 4. A shaft 5, about which the slay pivots, is driven from the shaft 2 by the spur wheels 13-18. and a shaft 19. A gear wheel 7 on the shaft 5 engages a gear wheel 8 mounted on a shaft 9 which rotates gear wheels 10, 11 and a disc 12 to drive the weft carrier 6.
Patent GB-214576-A (GB)
Title: Improved process for the electro-osmotic purification of glycerin
Filed: 1923-12-22
Abstract: In the purification of glycerine by electro-osmosis the current is passed through the aqueous solution from an anodic diaphragm of linoxyn to a cathodic diaphragm of closely woven sail-cloth.  The linoxyn diaphragm may be prepared by impregnating thin silk or wool fabric with linseed oil or linseed oil varnish, preferably diluted with a solvent, e.g. carbontetrachloride, and exposing to a current of warm air.
Patent GB-793324-A (GB)
Title: Improvements in and relating to fuzes for submarine explosive devices
IPC: F42C14/04
Filed: 1955-11-10
Abstract: 793,324. Fuze for depth charges and underwater projectiles. MENA Y VIEYRA DE ABREU, J. Nov. 10, 1955 [Nov. 10, 1954], No. 32234/55. Classes 9(1) and 9(2) A hydrostatic fuze for projectiles and depth charges comprises a cylindrical head 22 terminating in a shank 30 screwed into a depth regulator 11 which comprises a fuze-setting disc 12 and is covered by a cap 1. The head 22 has an axial bore in which a tubular rod 5 is slidably mounted, rod 5 being secured by balls 36. During transport, the rod is held inoperative by a safety pin 13 extending through the rod above a shoulder which supports the regulator 11. Attached to the head 22 is a casing 23 which houses a fluted sleeve 45, Fig. 4, having an annular recess 46 near one end and in the rim beyond are channels engaged by lugs 15 and diametrically opposed' openings housing balls 18 which engage a spring-stressed firing piston 19. Through two windows 24 in the casing 23 a depth indicator 25 can be checked, Fig. 6. A primer tube 20 is screwed into the piston base. Annular recesses 35 within the rod 5 are arranged to receive successfully balls 34, supporting a safety device 33. The rod 5 is co-axial with a tube 4, the rod and tube being arranged to move as a unit. In the tube 4 are two rows of diametrically opposed bores 17 and from the lower end project the lugs 15, which can engage the flutes 16 of the sleeve 45. The axial position of the rod 5 can be adjusted by means of the setting member 9 carrying the pointers 10 and rotatably held on the regulator 11. The cap 1 has openings controlled by valves 2, 3 to regulate the entry of water. Within the tube 20 a wooden plug 21 immobilises the primer 71, flash from which can pass to a detonator 26. Accidental ignition of the fuze is prevented by two rollers 28 which prevent passage of the carrier 20 into a channel housing a firing pin 8. To set the fuze, the cap 1 is removed and the indicator 9, 10 turned to the appropriate depth-setting on the disc 12, which setting is duplicated on the tube 4 and appears in the window 24, since any rotation of the indicator is communicated to the rod 5 by the pin 13. The lugs 15 are then engaged in the appropriate flutes of the sleeve 45 and by screwing home the regulator, the appropriate bores 17 in the tube 4 are brought into alignment with the balls 18. The pin 13 is then withdrawn and the closure 1 replaced, whereupon the projectile is launched. Water enters through the valves 2, 3 and when the hydrostatic pressure is sufficient to overcome the resistance of the balls locking the rod 5, the rod moves until the openings 17 in the tube 4 coincide with the balls 18 which then release the piston 19. The spring 6 stressed by the movement of the tube 4 drives the piston forwards so that the bevelled end of the carrier 20 pushes aside the rollers 28 and the primer hits the pin 8, the flash from the primer then passing to the charge 26.
Patent GB-844365-A (GB)
Title: Improvements in and relating to contact systems for airbreak electric circuit breakers
Inventor: JOYCE WILLIAM JOHN
IPC: H01H1/16
Filed: 1955-11-11
Abstract: 844,365. Contact members for switches. ENGLISH ELECTRIC CO. Ltd. Nov. 7, 1956 [Nov. 11, 1955], No. 32295/55. Class 38 (5). An air-break circuit-breaker has two fixed contacts 10 which are bridged by a moving contact 11 comprising at least two contact rings 11a, 11b coaxially mounted on resilient support means 11c so that each is capable of independent radial displacement and arranged so that one ring 11b breaks contact before the other 11a. The moving contact carrying arm 12 has a slotted end through which a pivot pin 11d passes and carries a rotatable metal tube 11e surrounded by a silicone rubber bush 11c on which are mounted the contact rings 11a, 11b. The ring 11a has larger internal and external diameters than the other rings as well as a smaller circumferential area. When the breaker is closed the ring 11a engages the fixed contacts 10 first and is displaced as shown in Fig. 1 to allow the rings 11b to make contact with their larger surfaces. On opening the ring 11a breaks contact last has a surface of material chosen to withstand arcing conditions, whilst the rings 11b are silver coated for current carrying. All the rings may be of the same external diameter and the surfaces of the fixed contacts may be stepped to ensure that contact 11b breaks contact last. The rubber bush 11c may be replaced by an arrangement of radial springs. Specification 844,366 is referred to.
Patent GB-155996-A (GB)
Title: A coding and decoding device
IPC: G09C1/08
Filed: 1919-12-24
Abstract: 155,996. Griffiths, J. P. Dec. 24, 1919. Codes.-A coding and decoding device is provided with characters arranged in two rows and with two pointers which can be moved together to indicate corresponding characters in the two rows, and can be adjusted in relation to each other. The two rows can be relatively displaced, and the order of the characters in the rows can be varied. In the preferred arrangement, the characters are arranged in concentric rings in partitioned spaces 9, 8 formed on a fixed plate 4 and a rotatable disc 5 enclosed in a casing 2 provided with a glass cover 3, and the pointers 26, 27 are angularly adjustable on a central spindle 29. The pointers are rotated by means of a knob 23 on a spindle 21 provided with a bevel-wheel 24 in engagement with a bevel-wheel 25 on the spindle 29. The bevel-wheel 25 is held in the set position by a detent 31 which can be released by depressing the projecting end of a lever, not shown in Fig. 1. The character blocks 8, 9 are tapered slightly in two directions to fit securely in the compartments in the plate 4 and disc 5. Channels 14, 15 are provided in the plate 4 in which the bloclcs can be temporarily placed when rearranging the order of the blocks in either row. The blocks are secured in position by a ring 16 adjustable by screws 18 to bring- flanges 17 to bear against the bottom faces of the blocks. The spindle 21 is movable endways against the action of a spring 12 to bring a pinion 20 into gear with a circular rack 19 on the disc 5, for adjusting the inner row of blocks 8, the bevel-gear 24, 25 being then temporarily disconnected.
Patent GB-1116121-A (GB)
Title: Improvements in or relating to means for spraying trees, bushes or the like
IPC: A01M7/00
Filed: 1964-08-10
Abstract: 1,116,121. Crop sprayers. S. C. SAYER. 10 Aug., 1965 [10 Aug., 1964], No. 32465/64. Heading AID. Vehicle-mounted apparatus for spraying trees, bushes and the like comprises a spring biased feeler member 3 pivotally mounted at the end of a boom 2 and operating a switch 18 on being deflected by a tree or the like to open an electrically operated valve 23 controlling the supply of liquid to nozzles 21. The member 3 comprises an arm 14 of rigid polyvinyl chloride fitted on a metal arm 15 having a cam portion at its inner end to engage the switch 18, the part 15 being pivoted on a plate 11 supported on tubes 9, 10. Spray liquid passes from a tank on the vehicle to nozzles 21 through tube 10 and an electric cable extends through tube 9, the tubes 9, 10 being longitudinally slidable in brackets 7, 8 to vary the length of the boom. The boom 2 is pivotable about post 13 and is held in its operative position by means of a spring loaded plunger 27 engaging in a recess on post 13.
Patent GB-633590-A (GB)
Title: Improvements in or relating to mirrors
IPC: F21V7/22
Filed: 1947-12-10
Abstract: 633,590. Lighting fittings. GREER, K. R., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Dec. 10 1947, No. 32540. [Classes 75 (ii) and 75 (iv)] [Also in Group XX] In a reflector comprising a support of transparent or translucent synthetic resin bearing a metallic reflecting surface the latter is enclosed for protection by a cover or backing member impervious to the atmosphere and secured to the support round the edges of the surface. The cover may be of metal such as steel secured by screws, bolts, adhesive tape or adhesive, or may be of synthetic resin (see Group XX). The reflector shown for street lighting comprises parabolic surfaces of polymethyl methacrylate carrying reflecting layers 4 of aluminium protected by a cover 5 of the polymethyl methacrylate secured to the mirror by cement 6. Studs 7 fasten the reflector unit to a mounting 2 above a lamp 3.