baber/WOPTO huggingface dataset:
Patent GB-1051411-A (GB)
IPC: H02M7/525
Filed: 1964-01-29
Abstract: 1,051,411. Inverting; control of A.C. motors. LICENTIA PATENT-VERWALTUNGSG.m.b.H. Jan. 29. 1964 [Jan. 30, 1963; March 27, 1963], No. 3782/64. Headings H2F and H2J. The Specification relates to inverters whose output voltage and frequency can both be controlled, and is an improvement upon inverters of the type having an arrangement associated with each controllable element whereby the element can be turned off at a desired instant independently of the turning on of the next element in sequence. Such arrangements are used for induction or synchronous motor control (Fig. 1, not shown). An inverting arrangement comprises an inverter whose frequency is controllable but whose valves always have the maximum conduction angle (e.g. 120 degrees in a three-phase inverter) supplied from a D.C. source through a chopping arrangement comprising elements, such as thyristors with associated turn-off circuits, in one or both D.C. lines which operate at a higher frequency than the inverter and by varying their on-off ratio determine the input voltage to the inverter and hence the final alternating output voltage. The basic arrangement is shown in Fig. 2 in which battery Ug drives motor M through a three-phase inverter comprising thyristors 101 to 106. Feedback diodes and capacitors to aid commutation are connected as shown. Two methods of controlling the chopper elements are described. In Fig. 3 (not shown), which is a single-phase version of Fig. 2, one chopper element comprises a main thyristor 120 having in parallel with it the series combination of a further thyristor 122 and capacitor 121. When the main thyristor is not conducting the capacitor is charged through a diode and resistor connected in parallel with the further thyristor. To turn off the main thyristor the further thyristor is fired, so discharging the capacitor across the main thyristor to reverse bias it. In the arrangement of Fig. 4 (not shown), and Fig. 5, a bridge of thyristors switches a commutating capacitor across the D.C. lines. Free-wheeling diodes may be provided (Fig. 6, not shown).
Patent GB-470255-A (GB)
Title: Improvements in or relating to the construction of sheds
IPC: E04C3/00
Filed: 1936-02-07
Abstract: 470,255. Building - frameworks ; roofs. SARRADE, E., and GALTIER, R. Feb. 7, 1936, Nos. 3825 and 3826. Convention dates, Feb. 9, 1935 and Sept. 5, 1935. [Classes 20 (ii) and 20 (iv)] Elements of the pivoted-parallelogram type for making the framework of sheds comprise two pivoted systems, each of which is formed, as shown in Fig. 1, of two main parallel bars 4, 5 pivotally connected to secondary cross-bars 7 which are arranged parallel to each other and inclined to the main bars, the two systems being disposed side by side and connected together, as shown in Fig. 3, with the main bars in juxtaposition and the secondary bars of the two systems disposed in opposite directions for ensuring the rigidity of the element. The bars 7 are pivoted at 23 to gussets 24 on the main bars, and the two systems are adapted to be connected together by rivets or bolts. The bars 7 are extended beyond the pivots 23 so that when the system is expanded the ends of these bars abut the flanges of the bars 4, 5, and rivets or bolts may be passed through corresponding holes in the main and secondary bars. The elements are adapted to be connected together to form the main longitudinal and secondary transverse truss members of a shed, each of such truss members comprising, as shown in Fig. 5, a main portion 1, vertical portions 1a, and inwardly-disposed portions 1b which are adapted to be embedded in the ground. The elements may be provided with additional stiffening bars disposed at rightangles to the main bars as shown in Fig. 5. The Specification as open to inspection under Sect. 91 contains also the following subjectmatter. Elements are formed of two parallel members 4, 5, Fig. 7 (Cancelled), connected by secondary members 6, 7, some of which are pivoted to the members 4, 5, and such elements are connected together to form the frame of a structure with adjacent elements overlapping for half their length. The main longitudinal truss frame is constituted by a number of elements 3, superimposed both longitudinally and transversely as shown in Fig. 4 (Cancelled), and the secondary trusses are similarly built up of superimposed elements 3 and secured on plates on the main truss frame. The elements shown in Figs. 19 and 20 (Cancelled) are adapted to be made rigid by means of the removable members 29, 30 respectively. A purlin 10, Fig. 11 (Cancelled), is fixed to a secondary frame 2 by means of an angle-bar 11 and T-bar 12, and the covering, which may be of canvas or metal or asbestos-cement plates, is secured to the purlins by hook-bolts. The rafters 41 may be of sheet-metal and of inverted U-cross-section with outwardly-turned edges 41a as shown in Fig. 22 (Cancelled). The covering comprises wire netting 44 and canvas 45, the latter sheet being provided with fittings 46 for connection to straps 47 which embrace the rafters 41. This subject-matter does not appear in the Specification as accepted.
Patent GB-874076-A (GB)
Title: Modification of rubbery copolymers
Inventor: TUNG CHING CHEN
IPC: C08K5/32
Filed: 1956-10-29
Abstract: Butyl rubber treated before vulcanization by heating with a dinitroso derivative of an aromatic secondary amine having one nitroso group attached to an aromatic nucleus and the other to the amino nitrogen atom, and in the absence of a filler has improved vulcanization properties.  The butyl rubbers comprise elastomeric copolymers of isobutylene and not more than 15% by weight of di-olefine hydrocarbons.  The dinitroso derivative may be, for example, an N,4-dinitrosoaniline having an alkyl, carbalkoxy, alkyl or haloalkyl group attached to the amino nitrogen atom (see Specification 874,075).  Fillers, e.g. carbon black and silica, may be incorporated after heat-treatment and vulcanization accelerators, e.g. dithiocarbamates, thiuram sulphides and mercapto thiazoles added for vulcanization by heat.  Reference has been directed by the Comptroller to Specification 819,293.
Patent GB-383273-A (GB)
Title: Improvements in and relating to electrical insulators
IPC: H01B17/12
Filed: 1931-02-07
Abstract: 383,273. Insulators. ROMMLER AKT.-GES., H., Spremberg, Germany. Feb. 7, 1931, No. 3903. Convention date, Feb. 7, 1930. Void [Published under Sect. 91 of the Acts]. [Class 36.] An insulator, cable conduit or the casings of electrical apparatus are formed of a metal core which is covered with a mixture of artificial resins and fabrics of fibrous material such as wool, cotton or asbestos. The buckle insulator shown comprises a metal core c, which may be solid or of tube form, on which is pressed a covering d of fibrous material with artificial resin as a binder. To increase adhesion, the core c is formed with grooves e.
Patent GB-1197041-A (GB)
Title: Improvements in or relating to Ventilating Grilles
Inventor: HOLFORD FREDERICK ROY
IPC: F24F13/075
Filed: 1968-01-25
Abstract: 1,197,041. Ventilators. ROYAIR Ltd. 16 April, 1969 [25 Jan., 1968], No. 3957/68. Heading F4V. A louvre mounted in a duct comprises a plurality of blades 1 fixed or pivotally mounted in a frame 2, a circular reduced width portion 11 of each vane being received by a mullion 5 which includes a rectangular, U-shaped or, as shown, H-shaped member provided with spaced notches for the portions 11 and a strip or, as shown, a T-shaped member secured to the notched member to retain the blades. The louvre is made of extruded aluminium or aluminium alloys. Spigots 3 of the blades 1 are tensioned in the frame 2 by piano wire.
Patent GB-251220-A (GB)
Title: Fastening device for the tight closing of the uppers of boots
IPC: A43C11/00
Filed: 1926-02-11
Abstract: 251,220. K³hl, W. Feb. 11, 1926. No Patent granted (Sealing fee not paid). Fastening. - A device for joining the front edges of the upper of a shoe in which there are elastic insertions k, Fig. 1, is characterized in that elements such as a and b have each at the rear end a rectangular extension e, Fig. 2, with slot f so that the elements can be attached by leather strips g in such a way that the edges i are brought into close contact. A projection c on the member a and the outer edge c of a slot d on the member b are continuous with the edges i.
Patent GB-283358-A (GB)
Title: Improvements in optical system for moving picture projectors
IPC: G02B27/12
Filed: 1927-02-14
Abstract: 283,358. Holman, A. J. Feb. 14, 1927. Kinematograph apparatus. - In continuous-feed projectors utilizing a single light beam and having a system of rotating lenses for optical compensation, one or both of the lenses B, C of the main condenser has a surface of greater power on one axis than on the other so as to produce an elliptical area of illumination at the gate 4 - - 4. After passing the condenser the light passes through a plano-convex lens D and then through a cylindrical lens E immediately before the gate. This latter lens has its axis parallel to the minor axis of the elliptical area of light whereby the beam a is caused to become circular in crosssection before reaching the optical compensating lenses G, G<1>. To correct for chromatism a concave lens F is situated as shown in the path of the rays and is of different glass to that of the optical compensator lenses G, G<1>. After passing the diaphragm J the beam is projected on to the screen by an objective H.
Patent GB-451939-A (GB)
Title: Process for the manufacture of purified germinal gland hormone preparations
IPC: A61K31/56
Filed: 1935-02-09
Abstract: The process described in the parent Specification in which a hormone preparation is treated with a compound capable of condensing with the hormone and containing in addition to the group which condenses, a group capable of salt formation, and using this salt forming group to effect a separation between the hormone containing compound and bodies which have not condensed, is modified in that in the above process a further subdivision of the esterified and non-esterified fractions is achieved by treatment of the hormone condensation product with aqueous alkaline solutions of various alkalinity in the presence of water immiscible organic solvents.  By this method there is obtained in addition to the separation of the male sex hormone from the follicle hormone, a separation of the various follicle hormones themselves.  The condensing agents which are described in Specification 450,325 may be used to form condensation products which can then be treated according to the present invention.  As starting materials there may be used extracts or preparations such as those obtained from the urine of pregnant individuals, placenta, ovaries and other organs, from vegetable material such as palm oil and the like, extracts from coal, mineral oils and similar products, and synthetic mixtures that are obtained for instance by oxidation of sterols.  In an example a hormone preparation obtained from the urine of mares is fused with phthalic anhydride, dissolved in ether and extracted with dilute sodium carbonate solution.  The ethereal extract is evaporated, saponified with 5 per cent methanolic potassium hydroxide, diluted with water and extracted with ether. The ethereal extract so obtained is extracted several times with 10--15 per cent aqueous potassium hydroxide, and this extract acidified to yield, follicle hormone.  The original sodium carbonate extract is made more strongly alkaline by the addition of potassium hydroxide, whereupon it is saponified, diluted with water and extracted with ether.  The ethereal extract is extracted several times with 10--15 per cent aqueous potassium hydroxide and the extract so obtained acidified to yield d -follicle hormone.  Samples have been furnished under Sect. 2 (5) of (1) d -follicle hormone and (2) follicle hormone obtained from the urine of pregnant mares and separated by an extraction process similar to that described in the above example and set out in tabular form, (3) follicle hormone hydrate, (4) follicle hormone, (5) male sex hormone, (6) pregnandiols obtained from the urine of pregnant women and separated by an extraction process similar to that described in the above example and set out in tabular form.  The Specification as open to inspection under Sect. 91 comprises also the subject-matter of Specification 450,325.  This subject-matter does not appear in the Specification as accepted.
Patent GB-487262-A (GB)
Title: Improvements in or relating to chrome steel
Filed: 1937-02-12
Abstract: Steel containing 0,2-0,7 per cent of carbon and 0.7-7 per cent of chromium, particularly 0,4 per cent of carbon and either 1,3 or 2,5 per cent of chromium, and suitable for making articles required to resist the action of hydrogen at high temperatures and pressures, are heat treated by chilling from 840-850 DEG  C., reheating to 600-685 DEG  C., and cooling slowly.
Patent GB-725690-A (GB)
Title: Improvements in or relating to printing mechanisms
Inventor: KEEN HAROLD HALL
Filed: 1953-02-16
Abstract: 725,690. Selective printing machines. BRITISH TABULATING MACHINE CO., Ltd. Feb. 16, 1953, No. 4260/53. Class 100(4). In a printing mechanism in which the characters are formed by the selective operation of a number of printing elements, the same elements, e.g. five segments 2 occupying the width of a character are selectively and repeatedly operated as the paper is advanced through the height of the character. so as to form the whole character row by row. Impression is made by the segments 2 through an ink-ribbon 25 on to the paper carried round a platen 18. If, e.g. it is required to print a letter I firstly, the central three segments are operated, then for five impressions, the central segment only, and finally the central three segments are again operated. These operations are controlled by the operation of a character relay from the sensing of perforations in a record card and by a master commutator 53 having studs 56 representing characters. This commutator is rotated step-by-step in synchronism with the platen and causes the operation of the required element printing magnets 9. The operation of the particular magnets 9 attracts armatures 10, moving rods 11, cranks 12, rods 13 and segment releasing latches 7. The segments released effect printing by the effort of adjustable springs 19 and are restored by a rotating cam 24. There may be a number of groups of segments 2 one group for each column to be printed. The matter to be printed is sensed from perforations in a record card which cause operation of a group of six storage relays which are selectively operated under control of a coding drum commutator and six gas-filled tetrodes. The contacts of the storage relays are connected to translating means comprising a network of relays, R7(A)- R7(Z), R7(1)-R7(0) (R7(A)-R7(N) (shown only, Fig. 6), whose contacts complete circuits from the master commutator 53 to the printing magnets 9. Paper carriage.-The platen 18 is mounted on plates 43 secured to plates 47 by slotted fixings 42 to enable horizontal adjustment of the platen in regard to the segments 2. Similar fixings between the plates 47 and the machine frame allows vertical adjustment. Specification 679,944, [Group XIX], is referred to.
Patent GB-1045553-A (GB)
Title: Improvements in or relating to tractor-trailer combinations
IPC: E02F9/02
Filed: 1964-01-31
Abstract: 1,045,553. Tractor-trailer hitches. P. P. RICHARD. Jan. 31, 1964 [Feb. 6, 1963], No. 4304/64. Heading B7T. A tractor and semi-trailer combination, Fig. 1, is provided with an upper hydraulically adjustable connecting rod 4 and a lower rod 5 permitting raising and lowering of the trailer end (see also Figs. 3 and 4, not shown). The rod 4 is rotatable about spindles 6, 7 at one end and about spindles 10, 12 at the other end, and the part 4a is adapted to rotate in the part 4. The rod 5 is universally jointed to the tractor and is connected to the trailer by a forked end. In a modification, either the rod 4 or the rod 5 may be length adjustable, e.g. by the provision of a hinged joint therein, and in Figs. 5, 6 (not shown), the quadrilateral hitch is arranged to readily uncouple a semitrailer for loading.
Patent GB-363885-A (GB)
Title: Improvements in and relating to lasts for use in the manufacture and repair of bootsand shoes
IPC: A43D5/02
Filed: 1931-02-12
Abstract: 363,885. Lasts. MILLWARD, S. H., The Boot Stores, Mansfield Road, Blidworth, Nottinghamshire. Feb. 12, 1931, No. 4349. [Class 17 (i).] Relates to lasts of the kind wherein a sole portion and a heel portion are carried by two members relatively displaceable to adjust the length of the last and mounted to swivel about a base. A locking device mounted in the base is constructed to occupy three positions, one locking the last to the base and against swivelling, one locking the last to the base but allowing swivelling, and one permitting removal of the last from the base. The forepart post 2 s secured to a disc 1 having a central boss 32 rotatable in a base 28. The heel post 3 is slidable in a guide towards and from the post 2 and carries a spindle 11 the head of which co-operates with a lever 8 for urging the posts apart, a spring 12 urging them together. A spring- pressed pawl 17, releasable by a handle 16, engages teeth 18 to maintain the posts at adjusted distance apart. The boss 32 has an annular groove 33 and four diametrically opposite recesses 34 therein, these parts co-operating with a locking pin 36 having a handle 39 co-operating with a cam or stepped member 40. Normally, the pin engages one of the holes 34. By partial rotation of the handle, the pin is made to engage only the groove 33, allowing rotation of the last but not removal. Further rotation of the handle allows removal. The sole and heel portions 4, 5 are detachable, being fitted on dowel pins and positioned by complementary-shaped abutting surfaces 25, 26. Shields 7 prevent ingress of dirt between the fore and heel posts. A strap 41 for holding the shoe in position is adjustable in tension by the provision of elastic links 42, the number of which can be varied. According to the Provisional Specification, the sole portion 4 may be mounted by means of two pins, one integral with the portion 4 and the other integral with the post, each pin engaging a hole in the other portion.
Patent GB-708767-A (GB)
Title: An improved machine for hobbing the teeth of gear wheels
Inventor: OLIVER KENNETH LLOYD
IPC: B23F5/22
Filed: 1952-02-20
Abstract: 708,767. Gear-cutting. BROWN MACHINE TOOLS, Ltd., D. Feb. 19, 1953 [Feb. 20, 1952], No. 4428/52. Class 83 (3) A gear hobbing machine comprises an angularly adjustable work-carrier 2, a traversable cutter-slide 6 carrying an angularly adjustable hob 7 and means for adjusting the centre-distance between the hob and the work. The work 16 is mounted in a cradle 2 adjustable angularly by a handwheel 8 and worm gearing. The hob 7 is angularly adjustable on the counterweighted slide 6 carried on a column 4, and is rotated through a reversing clutch 41 by a motor 17 which also rotates the work. A shaft 32 in the work-drive is pivotally supported to allow for cradle adjustment. The work 16 is clamped by a rod 60 having a head 61 engaging a C-washer 62. The rod is pressed downwardly by a spring 59, and is released for replacing the work by a hydraulic piston 64. The head 61 is engaged by a live centre 68 advanced by a hydraulic piston 67. Automatic operation of the machine is controlled by solenoid-operated valves. After the work has been clamped, the column 4 is fed to cutting depth by a hydraulic piston 78 and is clamped by hydraulicallyoperated bolts 83 operated by the build-up in pressure when the column is arrested by a stop. Further pressure build-up causes a hydraulic cylinder 88, attached to the cutter slide 6, to move upwardly or downwardly, and at a rate according to the setting of manual valves. At the end of its movement, the slide actuates a switch to release the clamping bolts 83 and to withdraw the column 4 rapidly. The column, at the end of its movement, actuates a switch to raise the centre 68 and to return the slide 6 to its initial position. The slide 6 finally contacts a switch to stop the main motor. Manual controls are provided for use in setting-up. Means for moving the hob axially may be provided. The machine is set to traverse the hob so that its teeth move along the helical line of the teeth of the work thus avoiding the necessity for compensatory rotation. The hob may be traversed clear of the work and returned to take a succession of further cuts.
Patent GB-256134-A (GB)
Title: Improvements in and relating to flexible shaft couplings and like joints
IPC: F16D3/76
Filed: 1926-02-16
Abstract: 256,134. Large, T. H. Feb. 16, 1926. Universal joints.-One or more flexible annular discs 9 are secured at the inner and outer peripheries to the coupled parts 11, 2 and the latter have grooves 16, 3, 4, into which the flexible rings 9 are pressed by rings 5, 13 correspondingly grooved, the rings 5, 13 being bolted or screwed to the coupled parts. The outer groove 3 of the members 2, 5, and the inner groove of the members 11, 13, may be omitted. The discs 9 may be built up of a number of radial sections, and each disc or each pair of discs may be separated by grooved thin metal rings 10.
Patent GB-284095-A (GB)
Title: Improvements in and in the manufacture of material for use in repairing punctures inthe air-tubes of pneumatic tyres and other pneumatically inflatable articles
IPC: B29C73/10
Filed: 1927-02-17
Abstract: 284,095. Surridge, R. Feb. 17, 1927. Punctures. closing.-Patches for repairing inflatable articles comprise an inner layer a of inextensible rubber and an outer layer b of larger area of extensible rubber. Both layers may taper gradually from the middle, or, as shown, the inner layer may be tapered at its margin only, and the inner surface of the complete patch presents a continuous surface. The patch is made by superimposing layers of rubber compounds needing different times for vulcanization and is vulcanized for the time necessary for the slower curing outer layer with the result that the inner layer becomes so tough as to be practically inextensible.
Patent GB-838255-A (GB)
Title: Improvements in or relating to sealing devices for rotary hydraulic machines
Inventor: SENIOR WILLIAM JAMES
IPC: F16J15/34
Filed: 1958-02-11
Abstract: 838,255. Stuffing-box substitutes. AUTOMOTIVE PRODUCTS CO. Ltd. Jan. 28, 1959 [Feb. 11, 1958], No. 4476/58. Class 122 (5). A sealing arrangement for the shaft 10 of a rotary hydraulic motor where it extends through the motor casing 12, comprises a primary seal housed in an annular recess 16 in the casing and consisting of an L-shaped section metal ring 17 that engages a radial shoulder 15 on the shaft and a rectangular section rubber &c. ring 18 seated in the angle of the metal ring and compressed between the wall of the recess and the metal ring and a secondary seal between the shaft and the casing which may comprise, as shown, a rubber &c. ring 20 radially compressed in an annular groove 21 and having a wearresistant facing 19.