baber/WOPTO huggingface dataset:
Patent GB-552694-A (GB)
Title: Improvements in and relating to electric switches particularly switches for conducting large currents
IPC: H01H1/22
Filed: 1941-11-26
Abstract: 552,694. Switch contacts. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). Nov. 26, 1941, No. 15212. [Class 38 (v)] A switch adapted for large currents comprises two fixed contact members 10, 11 and a series of bridging fingers 12, 13, 14 which bear in a pivotal manner on a cylindrical conductor 18 forming part of the contact 10 and move into and out of engagement with the contact 11. The co-operating surfaces 18, 19 of the conductor 18 and the fingers 12, 13, 14 preferably have different radii of curvature so that a line contact is obtained in each case and the contacts on the fingers are spherical or cylindrical so as to produce point or line contact. By this arrangement, flexible leads to the fingers are dispensed with. The fingers 12, 13, 14 as shown provide main, transfer and arcing contacts respectively and are of different lengths. They are operated by the movement of two pivoted side plates 28 which are connected by three rods 33, 34, 35, and which pivot about axes in line with the axis 18. Springs 36 between the rod 34 and the fingers 12, 13, 14 hold the fingers firmly in engagement with the conductor 18 and other springs 38 provide the contact pressure. The rod 35 passes through holes in the fingers of various sizes so that the fingers are operated in correct sequence.
Patent GB-553636-A (GB)
Title: Improvements in or relating to a transmitting or receiving device comprising a dipole antenna
IPC: H03H7/38
Filed: 1941-11-26
Abstract: 553,636. Wireless receiving and transmitting circuits. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Nov. 26, 1941, No. 15247. [Class 40 (v)] A circuit for coupling a dipole antenna 4 to a transmission line connected to terminals 1, 2, with or without a transformer 8, so as to ensure correct matching over a wide frequency band, comprises a resistance in two parts 5, 6 which together equal the radiation resistance of the antenna, tapped on to a resonant circuit 7 tuned to the natural frequency of the antenna 4. The tappings are chosen so as to include an inductance which is equal to the capacity of the antenna multiplied by the square of the radiation resistance. With these conditions the arrangement presents at the terminals 1, 2 an impedance which is a pure resistance equal to the radiation resistance of the antenna over a wide band of frequencies.
Patent GB-1267622-A (GB)
Title: Improvements in or relating to substituted propionic acids
Inventor: EL-CHAHAWI MOUSTAFA
IPC: C07C53/19
Filed: 1970-03-31
Abstract: 1,267,622. α,α - Dialkyl - # - chloro - propionic acids. DYNAMIT NOBEL A.G. 31 March, 1970 [1 April, 1969], No. 15277/70. Heading C2C. Compounds of formula ClCH 2 CR 1 R 2 COOH, in which R 1  and R 2  are alkyl groups, are prepared by chlorinating a compound of formula HOCH 2 CR 1 R 2 CHO, or an acetal thereof, in the presence of water or aqueous hydrochloric acid, and heating the reaction mixture containing a compound HOCH 2 CR 1 R 2 COOH and hydrochloric acid.
Patent GB-987816-A (GB)
Title: Stabilized chlorinated hydrocarbon solvent compositions
Inventor: SIMS LESLIE LEE
IPC: C23G5/028
Filed: 1963-04-18
Abstract: Chlorinated hydrocarbons, e.g. tri- or perchlorethylene, 1:1:2 - trichlorethane, carbon tetrachloride, ethylene dichloride and particularly methyl chloroform, for use in metal degreasing are stabilized by the incorporation of (a) a nitro-aliphatic compound having not more than 3 carbon atoms, preferably nitro-methane, (b) a 1:3-dioxolane which may contain up to two C1-2-alkyl substituents, preferably 1:3-dioxolane itself, and, optionally, (c) an aliphatic carboxylic acid ester, suitably ethyl acetate. Concentrates may be prepared for addition to the solvent in amounts of 1-4% by weight. Such concentrates suitably consist of 10-90% (a) and 90-10% (b) if (c) is absent, or alternatively of 10-80% of each of (a), (b) and (c).  Many other suitable compounds (a), (b) and (c) are listed.
Patent GB-553509-A (GB)
Title: Improvements in and relating to parting-off tools
IPC: B23D21/08
Filed: 1941-11-27
Abstract: 553,509. Parting-off in lathes. WILLIAMS, A. H. Nov. 27, 1941, No. 15294. [Classes 83 (iii) and 83 (iv)] A parting-tool particularly for dividing copper bands comprises a support 10 with a fixed cutter 12 and a slideway 21 for a block carrying a cutter movable under the control of a hand screw 22. The rollers run on ball bearings on pins 14 secured by grub screws, have side washers 16 and are formed to a V-edge with an inclined angle of about 60 degrees. The device is mounted in a lathe four-point tool post.
Patent GB-316571-A (GB)
Title: Improvements in the production of malleable metal pipes
IPC: B21C37/14
Filed: 1929-05-16
Abstract: 316,571. Weir, E. July 31, 1928, [Convention date]. Rolling tubes.-Tubes are rolled from hollow billets by collapsing the billet to form a flat division 23 and rolling out in a mill in which the spread of the division is controlled. A train of mills each of four coacting rolls is employed the rolls 5, 6 being of larger diameter than the rolls 7, 8. The rolls 5, 6 thus act on the billet first and prevent the rolls 7, 8 from opening it at the division. The rolls are mounted and adjusted in the manner shown and the tube is further treated as described in Specifications 312,166 and 316,212.
Patent GB-262381-A (GB)
Title: Improvements in or relating to lock-up devices for plate cylinders of printing machines
IPC: B41F27/10
Filed: 1926-06-18
Abstract: 262,381. Goss Printing- Press Co., (Assignees of Evensen, W., and Henrmanson, G. L.). Dec. 4, 1925, [Convention date]. Printing-surfaces. - In plateclamping devices for the cylinders of printing-machines, a spring- pressed clip rod is provided with means for neutralizing the action of the spring in the unlocked position of the device, in order to facilitate rotation of the clip rod. The clip and clip rod are in screw-threaded engagement, and stops are provided on the rod to enable the clips to be positioned for clamping plates of different widths, clamping being effected by means of a lock-up plate. A number of recesses 5 are formed in the periphery of the cylinder 1, and in each recess an outer clip 3, an inner clip 4, and a clip rod 6 are adapted to slide. The clip rod is formed in two parts 7 and 8 screwing together, the part 8 being held against rotation by the engagement in a slot therein of a screw 16 in the cylinder. The clip 3 screws on to the part 7 of the rod 6, and is positioned according to the width of plate to be clamped by adjustable stops 12, 13. The pitch of the screwthreads between the clip 3 and rod 6 is twice that of the threads between the parts 7, 8. The clip 4 is loosely mounted on the part 8 and is positioned by stops 19, 20. The printing-plates are clamped by a lock-up plate 29 operated by an eccentric in the usual way. Each rod 6 extends into a recess in the plate 29, and a spring 28, tending to force the clips into locking-position, is compressed between a collar 24 on the rod and a cover-plate 30<1> secured to the plate 29. The outer end of the rod 6 is squared for engagement by a spanner or like tool. In order to prevent the collar 24 from being forced by the spring into contact with the wall of the recess in the plate 29 when the device is unlocked and so to facilitate the rotation of the rod 6, a collar 26,. adapted to pass through an aperture in the plate 30<1>, is adjustably secured on the rod 6, and the spring 28 is sufficiently large to engage the collar 26 and the plate 30<1>. When an outer printing- plate 2 and an inner printing-plate 32 are used, the stop 19 is adjusted so as to leave a slight gap between itself and the clip 4 in order that the pressure of the spring is transmitted through the clip 3 and plates 2, 32 to the centre clip 33, but, when the outer plate is dispensed with, the stop 19 is caused to engage with the clip 4. To adjust the clips from the position shown to a position for clamping narrower plates, the red 6 is rotated until the clip 3 engages the previouslyadjusted stop 13, the part 8 of the rod being thereby moved half the distance in the same direction.
Patent GB-130206-A (GB)
Title: An Instrument for Making Calculations Involved in the Navigation of the Air.
Inventor: CLAXTON JAMES OSCAR
IPC: G06G1/12
Filed: 1918-09-23
Abstract: 130,206. Claxton, J. O. Sept. 23, 1918. Plane - trigonometry calculators; slide-rules.-An instrument for making vector calculations, more especially such as are required for aerial navigation, comprises two transparent sheets a, b, Figs. 2 and 3, each graduated with a series of concentric circles and radial lines, and adapted to move one over the other without relative rotation. This may be effected by parallel link mechanism or, alternatively, the sheet a is applied to or forms part of a cylinder, Fig. 1, and the sheet b is shaped to cylindrical form to fit over it. For logarithmic calculations, the sheet a carries a helical logarithmic scale and the sheet b has index arrows b<1>, b<2>. A transparent ring c having an index arrow c' slides over the sheet b. As an example of the use of the instrument for vector calculation, let it be required to know the compass course that must be steered bv an aircraft with an air speed of 110 m.p.h., to make a N.E. point with a west wind of 40 m.p.h. The centre of the circles on the cylinder b is put over the point (40, 270) marked on the inner side of circle 60 on the cylinder a. The intersection of the circle 110 on the cylinder b with the line 45 on the cylinder a then gives on the cylinder b the bearing of the course to be steered, namely 31 degrees and on the cylinder a the ground speed of the aircraft, namely 134 m.p.h. The logarithmic scale also has a number of height graduations 5000, 10000, &c., opposite the logarithm to the factor by which the airspeed indicated by the pilot tube indicator must be multiplied to find the true air speed, and vice versa. The instrument may be used in conjunction with a map or chart of an area, for indicating on the chart a course to be steered or the course actually steered.
Patent GB-1433995-A (GB)
Title: Indexing cam for roller gear drive
IPC: F16H55/22
Filed: 1974-04-08
Abstract: 1433995 Intermittent toothed gearing UMC INDUSTRIES Inc 8 April 1974 15471/74 Heading F2Q In an indexing apparatus continuous rotation of an input shaft 3 is converted into intermittent rotation of an output shaft 13 by a mechanism comprising a grooved cam 4 fast on the input shaft 3 engaging roller followers 11 on radial spindles of a follower hub 12 fast on the output shaft 13. The arrangement is such that the grooved cam 4 has bevelled side ribs 21, 22 which during each dwell period, between indexing movement, engage the preceding and succeeding rollers 19, 20, the intermediate, i.e. indexed, roller 17 being freely i.e. inactively accommodated with clearance in the central cam groove 10 during the dwell period period. During the period of each indexing movement at the cam indexing point 23 the intermediate roller and one of said preceding and succeeding rollers are in engagement with relevant cam surfaces 24-30 to eliminate backlash and ensure very accurate indexing movement. The cam 4 is mounted with some preloading with respect to the follower hub 12 to ensure some pressure loading between the cam and hub roller followers during both the index and dwell cycles. The central cam groove 10 may be widened to accommodate more than one indexed follower rollers therein at a time.
Patent GB-551865-A (GB)
Title: Improved means for draining condensation water in flues of geysers and other heating appliances
IPC: F24H9/16
Filed: 1941-12-02
Abstract: 551,865. Pipe joints. HURDEN, E., and SNELLING, J. C. Dec. 2, 1941, No. 15517. [Class 99 (i)] [Also in Group.X] A drainage cup or cap A for the removal of condensation water from the flues of geysers and other heating appliances is moulded with its floor B sloping downwards to a flared outlet fitted with the trumpetshaped head C of a drainage pipe D which is threaded to receive a securing nut E. The cup may be formed of asbestos-cement and the part F surrounding the outlet may be thickened.
Patent GB-422675-A (GB)
Title: Improvements in or relating to automatic firearms
IPC: F41A3/66
Filed: 1934-05-24
Abstract: 422,675. Automatic guns. NORMAN, G., 322, Mansel Road, Small Heath, Birming- ham. May 24, 1934, No. 15534. [Class 119] Relates to firing mechanism adjustable for single-shot or continuous fire, of the kind in which the pivoted sear 8 is released by trigger mechanism 10, 11, the rod 11 of which is moved out of engagement with the sear when the last cartridge leaves the magazine by a pivoted trip member 24, a further disconnector 34 being provided which is adjustable out of the path of the breech bolt 108 for continuous fire and into the path of the bolt to cause disengagement of the rod 11 for single-shot fire. According to the invention, the disconnector 34 acts upon the sear 8 through the medium of the trip member.. The disconnector is shown mounted on an eccentric portion of the pivot pin 20 of the trip member and has a slot 32 engaging over a pin 33 on the trip member. When the pivot pin is rotated to the position shown for single-shot fire, the eccentric moves the disconnector 34 so that it projects into the path of the breech bolt which depresses it to move the pin 33 and operate the trip member to release the sear. Rotation of the pivot pin through 180 moves the disconnector out of the path of the breech block to permit of continuous fire, the sear being then held in the released position by the trigger mechanism until the magazine is emptied when a projection on the magazine follower rocks the trip 24. This co-acts with the end of the rod 11 and removes the shoulder 13 from the sear arm 14 to permit the sear to hold the breech block in the open position. The invention is shown applied to a gun as described in U.S.A. Specification 1,437,889, the frame 105 carrying the trigger mechanism being slidable from the rear in guides on the underside of the breech casing 101 and being retained by a spring catch 2 released by pressing a button 5.
Patent GB-329837-A (GB)
Title: Improvements in or connected with cutter-chain machines for use in mining coal and other minerals
IPC: E21C35/20
Filed: 1929-05-18
Abstract: 329,837. Mavor & Coulson, Ltd., and Sproul, J. C. May 18, 1929. Screw and worm conveyers.-For removing cuttings from the coal face, a coal cutting machine is provided with a conveyer comprising two alined helices 12, 13, of opposite hand and driven in opposite directions so that the lower part of the helix which last engages the cuttings moves away from the machine. The conveyer is carried by pivoted arms 7 and driven bv worm gearing through transverse shafts and chains. A scoop partly surrounds the conveyer.
Patent GB-318163-A (GB)
Title: Improvements in and relating to pipe joints
IPC: F16L17/04
Filed: 1928-05-26
Abstract: 318,163. Reynolds, D. H. B. May 26, 1928. Joint-making packing.-In a joint for pipes g, g, Fig. 3, wherein fluid-tightness is secured by a rubber &c. packing-ring a, Fig. 1, which'is enclosed within a sheathing k, pressure is applied to the margins of the flanges c, c of the packing ring nearest the pipe ends through the web thereof to maintain said margins in sealing condition by that part of the sheath which is in alignment with said margins. In a modification, Figs. 4 and 5, adapted to withstand high external pressures the side walls d of the packing ring have the external surfaces thereof angularly arranged; alternatively, external triangular flanges e, Fig. 6, are provided on the said side walls d as shown. Other slightly modified forms of packing rings are also described. In each case the minimum internal diameter of the flanges c is made less than the diameter of the pipes to be connected, so that a small amount of initial strain is introduced when the packing ring is positioned, while the flanges c are provided with perforations h or slots j for transmission of the internal fluid pressure to the back thereof. The sheath is adapted to engage grooves in or projections on the pipe ends so as to prevent longitudinal displacement of the pipes, and is preferably of flexible material and of a curvature, different to that of the packing ring, Fig. 13, so that, when distorted during assembly an even pressure is imparted to the said ring.
Patent GB-829286-A (GB)
Title: Improvements in or relating to sodium vapour electric discharge lamps
Inventor: NELSON EVAN HERBERT
IPC: C03C3/064
Filed: 1955-05-03
Abstract: 829,286. Discharge lamps. GENERAL ELECTRIC CO. Ltd. May 17, 1956 [May 31, 1955], No. 15604/55. Addition to 801,482. Class 39(1). [Also in Group XXIII] A sodium vapour-rare gas discharge lamp having a U-shaped envelope sealed into a singlewalled highly evacuated outer jacket and with each limb, of circular or non-circular section, of the envelope closely surrounded by a sleeve of transparent heat-insulating material as described in the parent Specification, has at least one sleeve formed wholly or partly of a material which is highly transparent to the visible radiations of 5890Š and 5896Š wave length emitted by the sodium vapour discharge, but which is such that the proportion of the incident infrared radiations from the discharge which is directly transmitted through the sleeve is appreciably less than the proportion which would be directly transmitted through a sleeve of the same dimensions formed wholly of soda glass having the composition in percentages by weight : SiO 2 -70-0, Al 2 O 3 -2À5 CaO-5À5, MgO- 3À5, Na 2 O-17À0, K 2 O-0À4, B 2 O 3 -0À8, SO 2 -0À2. The or each sleeve can be wholly or partly formed of a phosphate glass having the composition in percentages by weight : P 2 O 5 -67À44, Al 2 O 3 -13À44, CaO-7À12, B 2 O 3 -5À00, SiO 2 -5À00, Fe 2 O 3 -2À00. The phosphate glass manufactured by Chance Bros. Ltd. known as ON20 may also be used. Each sleeve may-consist of a cylinder of glass such as the aforesaid soda or phosphate glass coated on one or each surface with a thin film which is highly transparent to the yellow sodium light but which has a high absorption and/or reflection factor for infra-red radiations. The film may consist of copper, gold,- titanium dioxide or stannic chloride formed by thermal evaporation, sputtering or chemical decomposition. The sleeves may be slid on to the limbs of the U-envelope and held in position by means which restrain the sleeves against relative longitudinal displacement but without the sleeves being attached to the limbs and without the intervention of spacing means ; alternatively the sleeves may be attached to the limbs at one or more regions whose total axial length is small compared with the axial length of the limbs. The sleeves can be used in the specific constructions of lamp described in the parent Specification.
Patent GB-568312-A (GB)
Title: Improvements in or relating to devices for sharpening safety razor blades
IPC: B24D15/08
Filed: 1943-09-23
Abstract: 568,312. Sharpening razors. KEY, J. T., and OSCHINSKY, V. Sept. 23, 1943, No. 15654. [Class 60] A device for sharpening safety razor blades comprises a metal frame 10 with end flanges 11, the frame being apertured at 12 to fit over the pins &c. on the cap 13 of a razor. The ends 14 of the flanges 11 are apertured to receive hard steel rods 15, the ends of the rods projecting beyond the frame and having knurled or serrated rollers 16 secured thereon. In operation, the frame is placed on the razor cap 13 and the razor is assembled with the edges of the blade 17 resting on the rods 15, the razor then being moved to and fro on a surface to engage and rotate the rollers 16 and rods 15.
Patent GB-866771-A (GB)
Title: Process for the purification of titanium tetrachloride or zirconium tetrachloride
Inventor: RICHMOND JAMES THOMSON
IPC: C01G23/02
Filed: 1956-05-18
Abstract: Titanium or zirconium tetrachloride contaminated with vanadium is purified by passage through a bed of solid particles in the fluidized state in the presence of hydrogen sulphide or a metal sulphide, which may constitute the bed, at a temperature below that at which zirconium or titanium tetrachlorides react with the hydrogen sulphide or metal sulphide and preferably at a temperature not exceeding 400 DEG C.  Suitable metal sulphides are ferrous, copper, titanium, zirconium and molybdenum sulphide.  The process may be effected at atmospheric pressure; residence times of tetrachloride vapour are not normally less than 1 sec. According to Examples (1) a vanadium-contaminated titanium tetrachloride vapour mixed with nitrogen, and a stream of hydrogen sulphide were separately introduced into a fluidized bed containing silica sand.  The titanium tetrachloride/nitrogen mixture was preheated to 190 DEG C. and the bed was maintained at this temperature by external heating.  The residence time was 1.62 seconds and the vapour leaving the reactor was condensed.  Most of the vanadium contaminate remained as a solid in the bed and any carry over of vanadium was settled from the liquefied titanium tetrachloride.  (2) A titanium tetrachloride nitrogen mixture was passed into a fluidized bed of ferrous sulphide maintained at 160 DEG C. and the purified titanium tetrachloride was condensed.  (3) Zirconium tetrachloride vapour containing iron and vanadium contaminate diluted with nitrogen, and a stream of hydrogen sulphide were separately introduced into the reaction vessel used in (1) above which contained sand maintained at 320 DEG C. by external heating.  The tetrachloride was preheated to the same temperature and the vapour leaving the fluidized bed was condensed to solid zirconium tetrachloride containing reduced amounts of iron and vanadium. Purification of titanium tetrachloride is preferably effected at 140 to 300 DEG C. and, for zirconium tetrachloride, at 300-350 DEG C.
Patent GB-625612-A (GB)
Title: Improvements in or relating to pipe couplings
IPC: F16L27/073
Filed: 1947-06-13
Abstract: 625,612. Pipe joints. HEYGATE, J. R. June 13, 1947, No. 15684. [Class 99(i)] A ball-and-socket joint comprises a socket 21 having a cylindrical bore, packing rings 18, 19 fitting the bore on opposite sides of a ball 16, and a nut 22 screwing on to the socket and engaging the projecting end of the ring 19. The nut is locked by a screw 27 engaging a selected peripheral notch in the nut. The ball and socket are formed as elbows 10, 11. Specifications 25826/02, [Class 99], and 447,502 are referred to.