baber/WOPTO huggingface dataset:
Patent GB-817688-A (GB)
Title: Improvements in dialkylxanthine compounds
Inventor: FAND THEODORE IRA
IPC: C07D473/04
Filed: 1956-04-24
Abstract: Salt-like products of the general formula <FORM:0817688/IV (b)/1> (wherein R, R1 and R2 are alkyl groups of 1 to 4 carbon atoms, R3, R4, R5 and R6 are hydrogen atoms, alkyl groups of 1 to 3 carbon atoms or phenyl radicals and X is a dialkylxanthine or an 8-substituted dialkylxanthine radical in which the alkyl groups contain 1 or 2 carbon atoms are prepared by reacting the appropriate dialkylxanthine with a mixture of a tertiary amine NRR1R2 and an epoxy compound of formula <FORM:0817688/IV (b)/2> The reaction, which may be conducted at room temperature or at a raised temperature, is preferably carried out in an inert organic solvent, e.g. a lower aliphatic alcohol, dioxan or a glycol, both the amine and the epoxy compound advantageously being used in slight stoichiometric excess.  Water may be present or, preferably, absent during the reaction and slight traces of water may be removed azeotropically by distilling off the organic solvents, when the product separates on cooling.  In examples: (1) and (2) choline theophyllinate is prepared by heating theophylline with aqueous trimethylamine and ethylene oxide; (3), (7) and (9) the process of (1) is conducted anhydrously in isopropanol; (4) chloline 8-bromotheophyllinate is prepared as in (1); (5) choline 8-chlorotheophyllinate is similarly prepared; (6) choline 8-nitrotheophyllinate is prepared by the method of (3); (8) trimethylamine, 1 : 2-propyleneoxide and theophylline give theophylline (2 - hydroxypropyl) - trimethylamine by the method of (3).  The use of triethylamine, tripropylamine, tributylamine, methyl - diethylamine, ethyl - dimethylamine, propyl - dimethylamine, butyl - dimethylamine, 1 : 2 - butylene oxide, 2 : 3 - butylene oxide, styrene oxide and diethylxanthines in the process of the invention is also referred to.
Patent GB-876992-A (GB)
Title: Improvements in pressure vessels
Inventor: ROBINSON PATRICK PEEK
IPC: F02K9/60
Filed: 1958-04-21
Abstract: 876,992. Rocket motor casings. BRISTOL AEROJET Ltd. July 21, 1959 [April 21, 1958], No. 12575/58. Class 9(2). [Also in Groups XII, XXII, XXVI and XXVIII] In a rocket motor casing formed from two or more cylindrical parts 21, 22 and a hemi-spherical portion 20 each comprises an outer shell, surrounding an inner shell and having at its joining end a recess which is defined by the two shells and within which is secured a ring 18, which is joined to the joining end of the other portion. The intervening space between the inner and outer shells is filled by a steel honeycomb or corrugated structure 15, brazed to the two shells. The double shelled portion 22 is joined to a single shell nozzle 23 by joining the ring 18 to the nozzle or to a ring carried by the nozzle.
Patent GB-658039-A (GB)
Title: Improvements in drawing-tables
IPC: A47B27/16
Filed: 1949-05-11
Abstract: 658,039. Drawing-table stands. ANDERSSON, G., and BLOMSTROM, N. May 11, 1949, No. 12602. [Class 52 (iii)] The top of a drawing-table is carried by a spider 9 having lugs 10 pivotally secured by a transverse bolt 7 to a block 6 rotatably mounted at the head of a vertically adjustable pillar 4. The pillar may be elevated by pedal-operated hydraulic means.
Patent GB-721321-A (GB)
Title: Improvements in or relating to thermally operated timing devices
IPC: H01H43/30
Filed: 1952-05-19
Abstract: 721,321. Thermal switches. EL-KA ELEKTRISK APPARATFABRIKK. May 19, 1952 [May 23, 1951], No. 12680/52. Class 38 (5) [Also in Group VI]. In a thermally operated timing device which may be used in an electric toaster, the time of operation may be selected by moving a bimetallic element relatively to a fixed heating element and a pivoted two armed lever having a stepped formation providing different abutments for the element. In the figures, the bimetallic element 6 is moved axially with respect to the heater 5 by a control member 8 through a link 7 and has at its free end a projection 39 which extends into an aperture 12 in the pivoted two-armed lever 9. The aperture 12 is shaped to provide steps 13 ... 15 and the step with which the projection 39 co-operates is determined by the axial position of the bimetallic element. The device has two pairs of contacts 31, 32 and 33, 34, the uppermost contact 31 being carried by a blade spring 25 which has a roller 24 co-operating with a roller 23 on a further blade spring 22 to provide a snap action when the contacts 31, 32 are opened and closed. When the device is applied to an electric toaster, the parts initially occupy the positions shown in Fig. 2. The downward movement of a member 38 which may be associated with a bread carrying frame (not shown), closes the contacts, 31, 32. The heater 5 of the device is then energized in series with a holding magnet (not shown) for the bread carrier through the contacts 31, 32. The bimetallic element is heated and its free end 39 deflects downwardly to turn the lever 9 so that it permits the contacts 33, 34 to close and then opens the contacts 31, 32, Fig. 5. The closing of the contacts 33, 34 completes a holding circuit for the magnet so that the heater 5 but not the holding magnet is de-energized by the opening of the contacts 31, 32. The bimetallic element 6 now cools and turns the lever 9 back to open the contacts 33, 34 to de-energize the holding magnet and so terminate the toasting operation.
Patent GB-123271-A (GB)
Title: Improvements in Food Preparations.
Inventor: PEYTON EDWARD GEORGE
IPC: A23P20/20
Filed: 1918-02-02
Abstract: 123,271. Peyton, E. G., and Ferguson, R. Feb. 2, 1918. Food preparations. - Crusts for pasties are made from beans, peas, lentils, cereals, &c. treated as described in Specification 122,882. The pasty may contain potatoes or other vegetables with meat, bacon, ham, &c. Reference has been directed by the Comptroller to Specifications 10073/00 and 9528/06, [Class 58, Grain &c.].
Patent GB-342968-A (GB)
Title: Improved means for mounting the rake heads of side-delivery rakes, hay-rakes, swath-turners, tedders, and like machines
IPC: A01D78/00
Filed: 1930-04-25
Abstract: 342,968. Lubricating bearings. MARTIN'S CULTIVATOR CO., Ltd., MARTIN, W. E., and MILLS, F. W. J., Ryhall Road, Stamford, Lincolnshire. April 25, 1930, No. 12780. [Class 12 (ii).] In a side-delivery rake or like machine wherein rake bars are rotatably mounted by sleeves e on pegs a secured to a rotating spider, a removable bush g is mounted between the sleeve and peg and the inner end of the sleeve is supplied with oil through a hole q. The oil is lifted and fed between the bush g and its supporting peg a by a slot o formed in the side of a nut m holding the bush on the peg.
Patent GB-579375-A (GB)
Title: Improvement in hpmv electric discharge lamps
IPC: H01J61/86
Filed: 1943-08-09
Abstract: 579,375. Discharge lamps. GENERAL ELECTRIC CO., Ltd.. FRANCIS, V. J., and NELSON, E. H. Aug. 9, 1943, Nos. 12842 and 20477. [Class 39 (i)] [Also in Group XI] A compact, high power, high pressure mercury vapour lamp has a plurality of anodes 7 arranged in a cluster on one side of a plane so that each anode has an uninterrupted view of the cathode 4, which is on the other side of the plane; greater dissipation can be obtained than with a single large anode. The anodes may be tungsten cylinders arranged in a cycle about the axis 2, preferably out of contact but possibly in poor electrical contact. A tungsten reflecting disc may be placed in the centre of the circle but behind the plane containing the termination faces of the anodes. If axis 2 is also the axis of the co-operating parabolic mirror, the cathode may be either on the axis, or displaced from it to reduce obscuration. If the mirror axis is perpendicular to axis 2, the separation from the cathode of an anode nearer the reflector may be made greater than that of an anode further from the reflector. When the anodes are at different distances from the cathode the discharges must be equalized by adjusting the resistance in series with each anode. These resistances may be part of the anode support inside the lamp, with a common resistance outside; if they are outside, each anode requires a separate lead, such as the separate strips of a multiple strip seal 10 of the kind described in Specification 489,630. The seal 6 for the cathode lead may also be placed in the dotted position for certain dispositions of the lamp, to avoid obscuration or overheating or to encourage evaporation of condensed mercury. The relation between the dimensions of an anode and its maximum dissipation and life, are explained.
Patent GB-481064-A (GB)
Title: Improvements in or relating to demodulating circuit arrangements for phase modulated waves
IPC: H04B1/30
Filed: 1937-05-05
Abstract: 481,064. Wireless receiving systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 5, 1937, No. 12849. Convention date, May 5, 1936. [Class 40 (v)] An oscillating detector is caused to respond correctly to phase-modulated signals by tuning its anode with a circuit of such low power factor that it will not respond at a rate higher than the lowest modulation frequency on the received wave. The received wave after passing through the amplifier RFA, frequency changer andassociated oscillator ID, LO, and intermediate frequency amplifier IFA is fed in push-pull from circuit 18 to coil 20 and the grids of the oscillators 10, 12, the grid circuits including grid leak, and condenser units 6, 8, The anodes of the valves are connected together by the radio frequency piezo-electric crystal 14 and through chokes RFC to the push-pull low frequency output transformer 24, and through resistances 26 to the high tension source. Valves 10, 12 due to internal coupling produce oscillations of a frequency determined by the piezo crystal which is substantially equal to the carrier frequency to be received, and which excite the control grids in phase displaced relationship with and also preferably in quadrature with the incoming waves. Due to the action of the grid leaks the anode currents become unbalanced as the phase of the voltages on the grids vary and a low frequency output is obtained from the transformer 24. The relative phase of carrier and local oscillations may be controlled by voltages appearing across resistances 26 and acting on the frequency-changing oscillator through the circuit PCC. Figs. 2 and 3 (not shown) illustrate alternative forms of the low power factor anode circuits, consisting respectively of a length of tubular transmission line acting as a parallel tuned circuit, and a magneto-striction oscillator.
Patent GB-825063-A (GB)
Title: Improvements in rail fastenings
Inventor: DEAN ARTHUR
IPC: E01B9/28
Filed: 1956-04-26
Abstract: 825,063. Fastening railway rails. BRITISH TRANSPORT COMMISSION. May 23, 1957 [April 26, 1956], No. 12851/56. Class 104 (2). In an insulated rail fastening for securing flat bottom rails to concrete sleepers or other foundations a pair of bolts or screw-threaded stems spaced apart a distance slightly greater than the rail foot are located in holes provided in the sleeper and are secured in position by pins passing through holes in the sleeper and eyes in the lower end of the stems, a pad of rubber or other electrically non-conducting material is interposed between the sleeper and rail foot, and insulating clamps held by nuts on the upper end of the stems hold the rail foot in position, an outward limit stop being provided integral with the sleeper or other foundation. In the arrangement shown, the rail 1 is held against a concrete sleeper 2 through the intermediary of a rubber or like pad 19 by clamps 13 abutting an outward limit stop 14 formed on the sleeper 2 on one side and engaging the rail foot by a cut-away portion 15 on the other side. The clamps 13 are mounted on bolts or screw stems 3 held in position in holes 4 in the sleeper 2 by transversely-arranged bars 5 engaging eyes in the stems 3. The clamps 13, of rectangular external configuration, are held down by a flanged nut 9 through the intermediary of helical steel spring collars 11 or rubber bushes and seating cups 12. The pad 19 between the rail 1 and the sleeper 2 is held in position by wedge-shaped pad 16 of rubber or like material arranged beneath the clamps 13 and cut away on its thinner edge to facilitate assembly on the stem 3. The sleeper portion beneath the rail foot is slightly cambered and may be inclined to tilt the rail inwardly. The bolts or stems 3 are accommodated in the sleeper in such a manner to subtend an angle of approximately 90 degrees to the upper surface of the rail foot. Cylindrical countersinks may be provided in the upper surface of the clamps 13 to receive the springs 11 or rubber bushes. The clamps 13 may be made from blocks or plates of laminated resin bonded wood or other electrically non- conducting material. The portions 8 of the holes 7 which are not occupied by the bars 5 may be plugged by wooden or cork plugs and sealed or not with bitumen or the like.
Patent GB-839752-A (GB)
Title: Improvements in or relating to conveyor belts
IPC: B65G17/02
Filed: 1955-05-03
Abstract: 839,752. Conveyer belts. SUTCLIFFE Ltd., R., STREETS, H., and BOTTOMLEY, E'. Aug. 1, 1956 [May 3, 1955], No. 12870/55. Class 78 (1). Conveyer 3 has steel transverse members 1 embedded therein at spaced intervalsthe members being shaped at their ends to form grooves to grip driving cables 5. The grooves may be lined with frictional material. Specification 810,651 is referred to.
Patent GB-127457-A (GB)
Title: Improvements in and relating to Sewing Machines.
Inventor: THOMPSON WILLIAM PHILLIPS
IPC: D05B63/00
Filed: 1918-08-09
Abstract: 127,457. Thompson, W. P., (Union Special Machine Co). Aug. 9, 1918. Sewing-machines; chain-stitching and doubleloop - stitching. - Relates to looper - thread take-up devices of the type comprising a rotary cam 24 acting on the thread between guides 23 and co-operating with a take-up finger 26<1> and a check finger 28, and consists in mounting the fingers adjustably. In one form, Fig. 3, the shanks of the fingers 26', 28 are secured in apertures in a bracket 27 by clamping-screws 31. 34 and are adjustable vertically and horizontally respectively. Fig. 6 shows another manner of securing the finger 28, which passes through an aperture in a head 36 clamped by a threaded shank and nut 38 to the bracket 27. Abutment screws 39, 40 pass through the bracket and bear on the shank of the finger. A further construction is shown in Fig. 11. The fingers are carried by a head 41 adjustable vertically in a support 42, which is also adjustablv secured to the machine frame by a screw and slot 43, 44. The finger 26<1> is secured adjustably in the head 41 by a clamping-screw 45, and the finger 28 is adjustably secured in a head 46 pivoted to the head 41 at 48 and adjustable about the pivot.
Patent GB-1185192-A (GB)
Title: Improvements relating to Window Units
Inventor: PERRY DONALD JOHN
IPC: E06B3/38
Filed: 1967-03-21
Abstract: 1,185,192. Pivoted windows; glazing. PERRY BROS. (HALL GREEN) Ltd. 22 March, 1968 [21 March, 1967], No. 13070/67. Headings E1J and E1R. A window unit particularly for caravans, boats or prefabricated buildings has a sash 22 pivoted at 25, 26 at its upper horizontal edge to a frame 25 to be secured to the wall surrounding the window opening, both frames comprising extruded aluminium frame members and each formed by one U-shaped member forming three sides of the frame and a fourth top member secured thereto, in the case of the sash, this top member comprising two slidably interconnected members viz a frame member 22 which slides into a hinge member 23 and both are prevented from relative sliding movement by e.g. a screw, not shown, passing transversely through the members 22, 23 so that on removal of the screw the framepart holding the pane 12 can be slid out from the hinge part 23 and the pane 12 renewed by disassembling corner members having limbs 32, 23 secured in the recesses of the H-section top member 22 and the sides of the single U-shaped member 20 where the limb 33 is clamped by a releasable screw 35.
Patent GB-378388-A (GB)
Title: A process of manufacturing copper alloys
IPC: C22F1/08
Filed: 1931-05-04
Abstract: In a process for treating copper alloys containing one or more of the elements cadmium, nickel and silicon, the alloys are hot rolled, quenched, reduced in cross section by mechanical means, and tempered at 250-600 DEG  C., the reduction and tempering being carried out at least twice.  In an example an alloy containing 2,0 per cent of nickel, 0,4 of silicon and 0,6 of cadmium is drawn, after hot rolling and quenching, to a diameter of about 3 mm. at ordinary temperatures, is heated to 450 DEG  C. for 1 1/2 hours, drawn again to a diameter of 1,6 mm. and heated to 350 DEG  C. for 2 hours.  The Specification as open to inspection under Sect. 91 (3) (a) stated that the alloys treated may contain also aluminium, arsenic, antimony, phosphorus, cobalt, chromium, iron or manganese.  This subject-matter does not appear in the Specification as accepted.
Patent GB-635082-A (GB)
Title: Airfoil
IPC: B64C27/473
Filed: 1947-05-16
Abstract: 635,082. Aerofoils. GOODYEAR AIRCRAFT CORPORATION. May 16, 1947, No. 13212. Convention date, Nov. 29, 1946. [Class 4] An aerofoil, more particularly a helicopter rotor blade, comprises a spar formed from two interengaging U- shaped members 2, 3 arranged with their limbs horizontal, a monocoque leading edge section 6 of stainless steel, and ribs 4 to which are secured laminar trailing edge cover strips 9, 10, the laminations comprising a layer of fabric-reinforced thermosetting plastic 18 covered by sheets of stainless steel 19, 20. Lightening holes 14, 15, 17 are provided in the spar and ribs, the holes 15 and some of the holes 17 being closed by air-tight membranes to prevent the building up of pressure differentials due to the rotation of the blade. A trailing edge member 11 of triangular section, and made of a fabric-reinforced thermosetting plastic, is cemented to the middle layer 18 of the trailing edge cover strips 9, 10. The leading edge of the blade forms a passage for hot de-icing gases which are discharged through a hole 29 in the upper surface of the blade tip 12. A baffle plate 5 is secured to the spar member 2, and a heat transfer fin 8a is embedded in a counterweight 8 extending along the leading edge. Drain holes are provided in the lower corners of the ribs and spar, and in the tip member 12. The blade root member is inserted between the spar members 2, 3 and bolted thereto. The leading edge of the blade may be made as described in Specification 634,583, [Group XXII], and the root spar as in Specification 635,084, [Group XXII].
Patent GB-676266-A (GB)
Title: Method of and apparatus for forming lamp filaments
IPC: H01K3/04
Filed: 1950-05-25
Abstract: 676,266. Making electric lamp filaments. SYLVANIA ELECTRIC PRODUCTS, Inc. May 25, 1950 [May 28, 1949], No. 13224/50. Class 39(ii) A continuously wound coil 28 is formed into a bi-planar lamp filament having a number of coiled segments with a filament-supporting loop between each segment, the operation being performed manually by clamping one end of the filament in the innermost groove of a series of staggered vertical grooves 23 provided along the length and on both sides of a narrow mandrel 10 which is held between a guide 8 and a slide 9 within an elongated chamber 6 in a casing 5, the filament being manipulated by a pair of tools 30, 31, Fig. 10c, which are used first to produce a right-angled bend defining a segment 29, and then to retain a loop 35 between that segment and the next segment 36, as shown in Figs. 10e and 10f. The segments thus formed are clamped within their grooves 23 by moving the slide 9 outwardly relative to the mandrel 10, followed by rotation of the casing 5 through 180 degrees, about its longitudinal axis, for the formation of the next pair of segments, a similar rotation being effected for each subsequent pair. The guide 8 and slide 9 are elongated metal members with co-operating longitudinal grooves which together define a passage for the mandrel 10. The guide 8 is pivoted about fixed pivot 25 at its inner end and carries a resilient finger 26 adapted to engage successively within indexing grooves 24 at one side of the inner end of mandrel 10. A clamping-screw 11 through one side of the casing 5 is released to allow longitudinal movement of the members within the chamber 6. The outer ends of the members 8, 9 are provided with lateral projections 12, 13 respectively which serve as anvils, and a laterally extending screw 14 in the slide 9 provides a handle to facilitate longitudinal movement of that member. The longitudinal axis about which the casing 5 is pivoted is mounted in a block 2, Fig. 1, which is tiltable about a horizontal locking-screw 22 extending through a support 3 in order to adapt the inclination of the slide 9, mandrel 10 &c. to the needs of the operator. A " click " device comprising a spring- pressed ball which seats within either of two recesses on the diameter of a circle indicates when the jig has been rotated about its longitudinal axis through 180 degrees. When the folding of the coil into the several segments is completed, the mandrel 10, with the coil folded thereon. is removed from the jig and annealed or otherwise heat-treated to effect the setting of the coil.
Patent GB-822036-A (GB)
Title: An arrangement for adjustment of stage lighting
IPC: H05B37/02
Filed: 1956-04-30
Abstract: 822,036. Electric correspondence control systems. SIEMENS-SCHUCKERTWERKE A.G. April 30, 1956 [April 30, 1955; May 13, 1955; May 21, 1955; July 19, 1955], No. 13253/56. Class 40 (1). [Also in Group XXXV] An arrangement for adjusting a system such as a stage lighting system by means of main setting and pre-setting levers is characterized in that there are provided in association with each main setting lever a number of pre-setting levers, the settings of which may be transmitted to the associated main setting lever in any desired sequence by means of a device which includes electromagnetic clutches. A stage lighting system may comprise a main setting lever 1 and a number of associated pre-setting levers 28, 29, 30, the lighting conditions for different scenes being pre-set by means of the levers 28, 29, 30. When a scene is selected by manually-operated switches 40, 49-and remotely by push-buttons 57, 58, 59-a bridge circuit is formed comprising a potentiometer resistor 13 over which the main setting lever contact 12 moves, and as shown selected in Fig. 1, a potentiometer resistor 41 over which the pre-setting lever contact 28<SP>11</SP> moves. A battery 50 supplies the bridge and the potential difference between the contacts 12, 2811 energizes a polarized relay coil 16 to energize one or other of two electromagnetic clutch operating coils 22, 23 whereby the lever 1 is driven into correspondence with the lever 28 by means of either of the two continuous rotating shafts 10, 11 and one of the electromagnetic clutches 6, 7, when no potential difference will exist between contacts 12, 28<SP>11</SP>, the relay coil 16 and the clutch operating coil thus being de-energized. The lighting condition is controlled by a contact 12a on the main setting lever moving over a potentiometer resistor 14. In Fig. 4 the potentiometer resistors 41, 42, 43 are combined into one element 60 over which contacts 28<SP>11</SP>, 29<SP>11</SP>, 30<SP>11</SP> move. In another embodiment the polarized relay and the bridge potentiometer resistors may be dispensed with, the clutch energizing coils being energized over contacts associated with the levers 1, 28, 29, 30. Various physical arrangements of the apparatus are shown, in which for ease of operation the pre-setting levers may be of different lengths or where the presetting levers may normally lie below the surface of a casing and be brought into the operating position by means of cams. The pre-setting devices may be remote from the main setting device. A master control may be incorporated to return all the main setting levers simultaneously to the initial position.