baber/WOPTO huggingface dataset:
Patent GB-330199-A (GB)
Title: Improvements in or relating to methods of photographic printing by imbibition
IPC: G03C7/25
Filed: 1928-12-12
Abstract: 330,199. Tritton, F. J., and Colour Snapshots (1928), Ltd. Dec. 12, 1928. Photo-mechanical printing-surfaces.-A reliefplate for producing dye-impression prints on gelatin surfaces, of the kind produced by printing a photographic image on a silver halide gelatin emulsion layer containing a non-actinic dye, developing and treating the layer in such a manner as to harden the gelatin in proportion to its silver content, and washing the layer with water to remove the unhardened parts of the gelatin, is employed to make a dye-impression print on a gelatin layer containing a mordant suited to the dye which is to be used in printing. The non-actinic dye prevents the light from penetrating too deeply into the emulsion layer, and may comprise auramine, which washes out in the subsequent treatment of the layer. The exposed emulsion layer may be developed with a non- tanning, non-fogging developer, fixed, washed, and treated with a tanning bath which may comprise either potassium bromide, copper sulphate, and chromic acid; or bromide, ferricyanide, and bichromate of potash and acetic acid; or any bleaching-bath used in the bromoil process. The mordanted gelatin layer upon which the dye-print is to be made may also include soluble salts which cause the mordant to act more. readily. A blue print may be made by dyeing the relief plate with pinatype blue F, and bringing it into contact with a gelatin layer containing antimony oxychloride and magnesium oxide as mordants, and zinc sulphate as mordant-aiding salt. A red print may be similarly produced, the dye used being croceine scarlet, the mordant magnesium oxide, and the mordant-aiding salt manganous chloride. Other examples of suitable dyes, mordants, and mordant-aiding salts are given in the Specification. Colour photography. - Three relief printing- plates for producing colour prints may be prepared by the above-stated process, the photographic images being formed by printing through the support from colour-record negatives upon normal diapositive or lantern-plate emulsions. The reliefs are dyed with 2 per cent solutions of the appropriate dyes, and are brought in turn into contact with a sheet of gelatin-coated paper containing one or more mordants. Colour corrections may be made for example by bleaching out one of the dyes. or by chemically destroying the mordant so that the dye may be washed out.
Patent GB-1525725-A (GB)
Title: Printed circuit boards
IPC: H05K1/16
Filed: 1975-09-09
Abstract: 1525725 Photo-flash unit GENERAL ELECTRIC CO 9 Sept 1975 [27 Sept 1974] 37021/75 Heading G2X [Also in Division H1] A printed circuit board for use in a photographic flash unit is made by printing a non-conductive substrate with a specified radiation curable ink (see Division H1) followed by radiation curing.
Patent GB-344494-A (GB)
Title: Improvements in or relating to guards or safety devices for wood-working machinery
IPC: B27G21/00
Filed: 1929-12-04
Abstract: 344,494. Wood - working machines. YARWOOD, A. E., 42, Studley Road, Darnall, Sheffield. Dec. 4, 1929, No. 37114. [Class 145 (i).] A safety device for wood-working machinery such as spindle moulding machines, shaping machines, and circular saws, comprises a ring-like guard-carrying member b, a guard-plate e detachably and adjustably secured to a flattened extension of said member b, and a guard formed by a flap or leaf f hinged to the guard-plate e and having a serrated edge g for engaging the wood acted upon by rotating cutters h. The guard f is restrained from outward movement by a spring j secured at k to the guard-plate e and yields outwardly to the passage of wood thereunder. Tendency of the wood to be drawn back into the cutters is prevented by the said leaf coming in contact with a shoulder t on the guard-plate e, whereupon the serrated edge g digs into the wood and arrests its motion. An adjustable shoe o bears upon the work and is carried by a stem m passing through a lug n on the collar b, for the purpose of steadying the work. A further adjustable guard-plate s is provided on the side of the collar b opposite to that carrying the guard-plates e. For small work the shoe o may be replaced by a hinged stop similar to the hinged flap f.
Patent GB-1365095-A (GB)
Title: Anti skid hydraulic braking system incorporated in a vehicle ha ving wheels
IPC: B60T8/66
Filed: 1971-08-06
Abstract: 1365095 Anti-skid braking TOYOTA JIDOSHA KOGYO KK 6 Aug 1971 [8 Aug 1970] 37182/71 Heading F2F An apparatus for issuing anti-skid brake pressure modulating signals to a braking system incorporated in a vehicle comprises comparator means, e.g. a differential amplifier 109, responsive to a signal representing the velocity of the wheel of a vehicle and to a reference level representing a reference velocity, the arrangement being such that during a first relationship between the wheel velocity representing signal and the reference level no modulating signal is issued but during a second relationship a modulating signal is issued. A reference level establishing means responsive to the comparator means forms an input to the comparator means for establishing the level so that it varies with the wheel velocity at a first rate during the first relationship, at a second rate during a given period of time after the start of the second relationship and at a third rate thereafter. The first and third rates may be equal. In the apparatus shown in Fig. 2 the reference level is provided by a discharging capacitor 101  which during the first relationship, i.e. when the wheel velocity representing signal is above the reference level, discharges through a resistor 104 to effect the first rate variation. When the second relationship begins, i.e. when the wheel velocity representing signal falls below thereference level, the differential amplifier 109 gives a signal which causes the normally conducting transistor 103 to stop conducting so allowing the capacitor 101 to discharge through resistor 105 also to effect the second rate variation. A capacitor-resistor timing circuit 116, 117 is provided for a NAND gate 111 the effect being that during the time the differential amplifier is issuing its signal during the second relationship the harge in the circuit 116, 117 decays until, at the end of said given period of time, the NAND gate changes its state which allows the transistor 103 to conduct again thus bringing about the third rate variation which, since the capacitor 101 discharges only through resistor 104 again, is the same as the first rate variation. A second NAND gate with a capacitor-resistor timing ciscuit may be provided in the apparatus (Fig. 5, not shown). As shown in Fig. 1 the apparatus or control circuit controls a master cylinder actuated hydraulic braking system. The brakes may be internal shoe drum brakes (as shown) or disc brakes. The control circuit works through an electromagnetically actuated three-way charge over valve 71 which controls a brake pressure modulating valve 90. The modulating valve 90 in its passive condition is subjected to vacuum on bolth sides of its actuating diaphragm 92a.
Patent GB-1037777-A (GB)
Title: Improvements in or relating to processes for the preparation of formaldehyde polymers
IPC: C08G2/00
Filed: 1963-09-20
Abstract: Anhydrous formaldehyde or trioxane is polymerized, using a polyvalent metal chelate as catalyst, at -100 DEG  to + 80 DEG  C. Specified chelates include acetylacetonates, copper and stannous 8-quinolinolate and nickeldimethylglyonime. Comonomers, e.g. gamma-butyrolactone, phthalide or isocyanic acid may be present. The polymerization may take place as a liquid phase or vapour phase, the liquid solvent being a hydrocarbon, hydrocarbon halide, an ether or an ester, or preferably alkylene dicarboxylates such as methylene diacetate; an antioxidant may also be present, as may also chain transfer agents, e.g. water, aliphatic alcohols, acids and acid anhydrides, aromatic acids and esters. The reaction mixture, after polymerization, may be heated to 140 DEG  to 200 DEG  C. to esterify the resulting polymer in situ.
Patent GB-823659-A (GB)
Title: Improved vehicle frame and suspension system
IPC: B60G15/06
Filed: 1957-11-29
Abstract: 823,659. Road-vehicle spring suspensions. GENERAL MOTORS CORPORATION. Nov. 29, 1957 [Dec. 12, 1956], No. 37297/57. Class 108(2) A vehicle frame and suspension system includes a side member 10 having an upwardly offset section 22 and a cross member 32 secured to the member 10 and vertically spaced from the section 22, by brackets 38, 40. A transverse suspension control arm 54 is pivotally supported 'on the member 32 and extends between, or is pivotally mounted between, the member 32 and the section 22.
Patent GB-523027-A (GB)
Title: Improvements in and relating to electric welding apparatus
IPC: B23K11/24
Filed: 1938-12-22
Abstract: 523,027. Control systems for resistance welding. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 22, 1938, No. 37313. Convention date, Dec. 24, 1937. Addition to 495,484. [Class 38 (iv)] In a resistance welding supply arrangement of the type in which the primary of a welding transformer is supplied with a modulated voltage obtained from alternating current mains by a pair of modulators as in the parent Specification, means are provided to start a driving motor for roller electrodes when the first weld of a stitch seam is made, thereby ensuring that this first weld lies near the edge of the work. In the Figure roller electrodes 1 and 2 of a resistance seam welding machine are connected to the low tension winding 9 of a welding transformer and are adapted to be driven by an electric motor 3 fed through a switch 6 from three-phase mains 7. The high tension winding 11 of the welding transformer is supplied from a modulator set 12 in series with alternating current mains 13. In parallel with the high tension winding 11 is a circuit which includes auxiliary contacts 14 which close when the electrode pressure is sufficient, auxiliary contacts 16 which are closed when switch 6 is open, a protective resistance 15, and the operating coil 17 of switch 6. When, therefore, high tension winding 11 is energized by the first voltage impulse to effect a weld, the simultaneous energization of coil 17 closes switch 6 against spring 8 to start motor 3. The closing of switch 6 makes auxiliary contacts 18 which connect operating coil 17 directly across the main supply thus preventing re-opening of switch 6 when the modulated voltage falls to zero. Auxiliary contacts 16 open after contacts 18 close and the protective resistance 15 prevents a short-circuit of modulator set 12.
Patent GB-1471779-A (GB)
Title: Coating compositions
IPC: C08G63/181
Filed: 1974-08-28
Abstract: 1471779 Aminoplast/polyester coating compositions CHEMISCHE WERKE HULS AG 28 Aug 1974 [29 Aug 1973] 37536/74 Heading C3R A liquid coating composition comprises: a binder comprising 45-10% wt. of (A) aminoplast(s) or precursors, and 55-90% wt. (B) OH- and COOH- containing polyester(s) of average M.W. < 800; or a binder formed by co-condensing (A), or the starting materials for (A), with (B); where (B) is made by esterifying polyol component (I) and dicarboxylic acid component (III), (I) consisting by moles, of: (I.1), 0-50% C 3-6  aliphatic triols or tetrols, and (I.2) 100-50% diol component (II) consisting of ethylene glycol and/or propylene glycol, 0-30% being replaceable with other aliphatic or cycloaliphatic diols; and (III) consisting of, by moles, (III.1) 50-100% of aromatic or cycloaliphatic dicarboxylic acids or derivatives, the acids being hexahydroterephthalic acid with or without 1,2- or 1,3-dicarboxylic acids, and (III.2) 50-0% C 4-12  saturated aliphatic dicarboxylic acids or derivatives, 25- 75% of (III) being hexahydroterephthalic acid. The composition optionally contains a minor proportion 0-20% wt. of an organic solvent. (B) may have a degree of polymerization as low as 2À5. (A) may be aminoplast precursors liquid at 20‹ C. The composition may also comprise a pigment. The pigment/binder weight ratio may be from 0À3 to 1À3 or higher. 0À5% wt. ptoluenesulphonic acid may be present.
Patent GB-889351-A (GB)
Title: Improvements in or relating to the production of carbon
Inventor: DAVIDSON HUGH WILSON
IPC: G21C3/06
Filed: 1958-11-21
Abstract: A hemicellulosic material, e.g. xylan, derived from wheat straw, is dispersed in water, separated as a wet solid, e.g. in a centrifuge, dried, carbonized and graphitized.  The product, which is substantially impermeable owing to the presence of closed pores, is suitable for use in nuclear reactors as a shaped article, e.g. a container or pipe.  The layer spacing may be 3,40-3,42 .  Crystal size may be increased by the presence of silica, which may be introduced by dispersing the xylan in a pebble mill.  Up to 15% of carbon black or graphite may be introduced into the dispersion to act as filler.  The wet separated solid may be shaped in a die or formed into shapes during separation and drying.  The dried solid may be machined to shape.  The dried solid may be heated up to a temperature of 300 DEG C. or more under a pressure of up to 100 atmos. or more in an atmosphere of nitrogen, hydrogen, or carbon dioxide.  The solid may thereafter be heated to 1000 DEG C. packed in coke powder and to above 2100 DEG C. in an argon atmosphere.  Specification 860,342 is referred to.
Patent GB-1010517-A (GB)
Title: Device for multiple recording of values measured by chemical analysers
IPC: G01N21/17
Filed: 1962-10-08
Abstract: 1,010,517. Photo-electric analysers. A. ANSCHERLIK. Oct. 8,1962 [Oct.10, 1961), No. 37955/62. Heading G1A. The outputs of a plurality of photo-electric colorimeters or other chemical analysing apparatus are recorded on a single pen recorder by a device comprising three distributor switches coupled to the pen recorder drive and respectively providing periodic pulses to operate selectors in the analysers, pulses to start the analysers operating, and connection between the photo-cells and the pen recorder at the correct time. The motor 2 drives the pen recorder and three distributor switches 7,11,12. Distributor 7 periodically energises the relay 8 momentarily by discharging condensers 5 and 9 alternately. When switch 11 reaches position 112, relay 22 is energized to close contact 222 so that the closing of contact 81 by relay 8 steps the selector 210 on one contact. Relay 22 is held energized by contact 221. When selector 210 reaches contact 211, relay 17 energizes the electromagnet 24 which drains the sample chamber of the analyser and refills it with a new sample to be tested. When selector 210 reaches contact 212, relay 16 energizes the light source 25 of the analyser through contact 161 and simultaneously switch 12 reaches contact 121 to connect the analyser photo-cell 26 to the pen recorder galvanometer 13. The selector 210 steps on until it reaches contact 213, to energize relay 20 to open contact 201 momentarily to stop the analyser until switch 11 next reaches contact 112 when a new analysis comences. The contacts 111 and 113 to 116 and 122-126 are connected to the remaining analysers in the same way as contacts 112 and 121 so that the output of each analyser is recorded in turn.
Patent GB-1006368-A (GB)
Title: Portable lamp
IPC: F21L4/00
Filed: 1963-09-26
Abstract: 1,006,368. Electric battery lamps. O. W. SCHOTZ. Sept. 26, 1961, No. 38016/63. Heading F4R. [Also in Division H2] A portable hand lamp especially for underwater use comprises a casing 14, formed of two parallel cylindrical chambers 42, 44 to receive the batteries and a head portion 16 housing the bulb 86 and reflector 75, a resilient split ring 130 being slidably mounted in the head portion and having a battery contacting portion 14b and an open section at least equal to the diameter of the second chamber 44 so that in one position it contacts the batteries 46a in the second chamber and in the other the open section straddles the end of the second chamber. The reflector 75 and cover glass 68 are mounted in a U-shaped ring and held in place on the front of the head portion 16 by a screwed ring 18. The bulb 86, which has an end contact and a locating and contact-making flange, is held inside a metal sleeve 96 having an insulating lining, the sleeve contacting the flange and a spring contact at the base of the insulating lining contacting the end contact. An eyelet passing through the lining connects the spring contact to the first of a series of batteries 46, 48, 50 located in the chamber 42 and connected by means of a spring plate with bent back ends 126, 128 to a second series of batteries 50a, 48a, 46a located in the chamber 44, the first one 46a of which engages the contact 146. The sleeve 96 carries a metallic disc 105, the outer edge of which is in contact with a spring strip 208 secured to a rivet 204, the head of which is housed in a recess in the base of the switch housing 168 and covered by a cap of polyethylene having a central rivet normally out of contact with the head of rivet 204. The spring ring 130 engages a contact strip 198 connected by a rivet 190 to a metallic strip on the floor of the housing, which is permanently in contact with a bowed spring 212 on the inside of the switch operating knob 223. The knob has three positions determined by detents, in the first of which the circuit is open. In the second position, one end of the spring 212 engages the rivet in the polyethylene cap and the lamp can be flashed by bringing the rivet into contact with the rivet 204 by pressure on the knob 223. In the third position, the end of the spring 212 engages the cap rivet and presses this into permanent contact with the rivet 204. In a modification, the switch has only two positions, pressure on the knob in the "off" position producing the flashing. The reflector and cover glass may also be mounted between a shoulder on the ring 18 and a resilient gasket secured between the ring and head portion 16. Alternatively, they may be held between a shoulder on the ring and a snap ring held in a recess in the ring with a gasket between the shoulder and the cover glass. In this case the ring may have a wedge-shaped recess which receives the tapered end of the head portion 16.
Patent GB-1091203-A (GB)
Title: Fast nuclear reactor
Inventor: ACKROYD RONALD TUNSTALL
IPC: G21C1/02
Filed: 1963-09-26
Abstract: 1,091,203. Controlling reactors. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Sept. 10, 1964 [Sept. 26, 1963], No. 38048/63. Heading G6C. In a fast breeder reactor, a loss of coolant results in a fall in reactivity. A central fission zone is surrounded by a fertile region, separation between the two being effected by an annular gap, filled with coolant. The coolant in the gap and the fertile region function as a reflector under normal operation. A loss of coolant empties the gap, reflection is reduced, neutron leakage rises and reactivity falls due to neutron decoupling. Either liquid sodium or a supercritically pressurized aqueous medium may be used as a coolant. In the latter case, in order to enhance the leakage control, the coolant in the gap is maintained at subcritical temperture, as the density of supercritical steam decreases with rising temperature. In one embodiment, a second fission zone is mounted above the fertile region and the reactor criticality is dependent on fission in this zone. A loss of coolant causes melting of the central fission zone and hence compacting downwards away from the second fission zone. A negative reactivity charge is thus caused by the decoupling consequent upon the loss of coolant reflectivity and the separation of the fission zones. The second fission zone may contain moderator to effect thermal fission. In a modification separation between the fission and fertile regions is effected by an axial gap and an epithermal neutron absorber, e.g. hafnium, may be used.
Patent GB-1179680-A (GB)
Title: A Process for Producing an Expanded Porcelain-Like Material
IPC: C04B38/00
Filed: 1967-01-17
Abstract: 1,179,680. Expanded natural silicate material. UTOLIT A.G., and T. G. WILLIAMS. 17 Jan., 1967 [19 Jan., 1966; 2 Feb., 1966; 25 Feb., 1966; 19 March, 1966; 11 July, 1966], No. 38126/69. Divided out of 1,178,461. Heading C1M. An expanded cellular material is produced by pulverizing to a fineness of Bleine Number at least 2500 a mixture of a basic material composed of natural silicate, silicate earth or stone, having a silicate content of at least 40 wt. per cent, and a fusion and blowing agent which constitutes 1-20% by weight of the mixture, and which is in the form of a powder produced by mixing 30-50% by weight of ground scrap glass, 15-25% borax and the remainder ground Na2SiO3, wetting the resultant blowing agent mixture with one part (by weight) of an aqueous Na2SiO3 solution per 5-200 parts of the blowing agent mixture, heating to 850-900‹ C., cooling and grinding, heating the said basic material/blowing agent mixture to 800-1200‹ C. to foam the mixture, and cooling slowly to prevent recrystallization. Preferably the blowing agent/basic material mixture is granulated immediately prior to the heating step. The basic material may be sandstone quartz sand, molasse sandstone, pumice or pumice sand, lava earth or similar volcanic stones or mixtures thereof. A binding agent (preferably 1-10%) may be added to the mixture or to the basic material or blowing agent before mixing. Preferred binding agents are phenol-formaldehyde resins, furan resins, cement or plaster, or burnt brick material. After the granulation, a separator agent, preferably of the same material as the binding agent, may be added to the surface of the granules. The foaming may be carried out in a rotating kiln, or in moulds to obtain, e.g. tiles or pipes.
Patent GB-362687-A (GB)
Title: Improvements in and relating to thermionic valve amplifiers
IPC: H03F3/02
Filed: 1930-12-18
Abstract: 362,687. Valve amplifying circuits. SCHOENBERG, I. and CONNELL, W. H., 102, Clerkenwell Road, London. Dec. 18, 1930, No. 38234. [Class 40 (v).] The pentode output valve of a radio-gramophone is convertible to operate as a triode valve when records are being reproduced. As shown, the output valve a operates as a pentode when the switch arms k, n are thrown to the right-hand contact l1, m1, the screen-grid i receiving its voltage from the terminal l1, and the anode c being connected through the transformer primary coil d and switch arm n to the voltage source. When the switches are thrown over to the left, a tapping on the output transformer is connected to the high-tension source through contact m2, and arm n; whilst the screengrid i is directly connected to the anode. The switches k, n may be operated in conjunction with another switch for connecting the phonograph pick-up in circuit. When the valve is functioning as a triode, the anode c may be disconnected.