baber/WOPTO huggingface dataset:
Patent GB-682204-A (GB)
Title: Improvements in photographic enlarging apparatus
IPC: G03B27/32
Filed: 1950-03-13
Abstract: 682,204. Photographic enlarging apparatus. DU HEAUME, E. H. March 1, 1951 [March 13, 1950], No. 6189/50. Addition to 638,870. Class 98 (i). The enlarger of the parent Specification is modified by elimination of cable 8, 81 and the pulleys over which it runs; and, as shown in Fig. 1, provision on one of the upright supports 2 of a clamp a through which extends the cable 14 between pulleys 17, 21 on the sliding carriage 4; and provision of pawl c on lens carrier 5 and ratchet teeth d on the carrier 4 to lock the carrier and carriage together. To alter the scale of enlargÚment the cable 14 is clamped to the support 2, the pawl c is released from the teeth d, and then movement of the lens carrier 5 is accompanied by corresponding movement of the carriage 4 and hence the negative carrier 6. To alter the focal plane after achieving a desired scale of enlargement, the clamp a is released so that cable 14 is free to travel through it, but pawl c is engaged with the teeth d; thereafter upward adjustment of the lens carrier 5 is accompanied by movements of the carriage 4 and negative carrier 6 to adjust the focal plane without alteration in the scale of enlargement. An improved nodal point adjuster, Fig. 2 (not shown), is provided also.
Patent GB-1464857-A (GB)
Title: Chromic acid anodising of aluminium and its alloys
IPC: C25D11/08
Filed: 1974-05-08
Abstract: 1464857 Anodizing Al in chromic acid NATIONAL RESEARCH DEVELOPMENT CORP 8 May 1974 [8 Feb 1973 12 June 1973] 6234/73 and 27850/73 Heading C7B Al or Al alloy is anodized in chromic acid of 0À05-0À7M at 55 to 70‹C at a c.d. below 50 mA/cm<SP>2</SP> but, for at least the major portion of the process, above 6 mA/cm<SP>2</SP> to produce an anodic film of thickness at least 15Á. Conditions are e.g. 90-150V for up to 90 mins. D.C. with up to 10 per cent A.C. may be used. Air agitation at the electrodes is specified with a steel cathode, and cathode: anode area ratio from 10-30:1. Increased V at constant c.d. produces a film having pores whose size increases towards the Al surface. Operation at constant V is possible. The anodic film may be sealed in boiling water or steam or with a lacquer or resin. Pre-treatments include degreasing and etching in inhibited NaOH or electro-polishing in HClO 4 /ethanol.
Patent GB-676385-A (GB)
Title: Improvements in or relating to heat insulating building constructions
Inventor: MALLOCH STIRLING MCLAREN
IPC: E04B1/76
Filed: 1950-03-13
Abstract: 676,385. Walls, roofs; slabs. THERMACOUST, Ltd. Dec. 6, 1950 [March 13, 1950]., No. 6285/50. Classes 20(iv) and 87(i) [Also in Group XIII] For a heat insulating wall, roof or lining thereof, slabs 1 of heat-insulating material are rabbeted on their side edges to produce tenons 3 which are enclosed in strengthening channels 4 of metal or plastic and the cavity formed by the two adjacent recesses 2 in the slabs is filled with a heat-insulating strip 5. The slabs and strip may be of wood wool or the strips may be of cork. Specification 474,994 is referred to.
Patent GB-512420-A (GB)
Title: Improvements in or relating to cooking utensils
IPC: A47J37/10
Filed: 1938-03-01
Abstract: 512,420. Frying-pans &c. BAINES, A. L. March 1, 1938, No. 6347. [Classes 21 and 66] A strut 17 adapted to support the vessel in any one of a number of inclined positions is pivotally mounted in a bracket formed in one with or adjustably attached to the handle of a frying pan &c, The bracket shown comprises a pair of similarly shaped members 13 attached to the handle by bolts 15, 16, the last mentioned bolt affording the pivot about which the looped upper end of the strut turns. The lower portions of the members 13 are formed with notches 19... 22 radiating from the pivot, in any pair of which notches the strut is held until displaced therefrom by a slight force.
Patent GB-1394307-A (GB)
Title: Device for generating variable pressing forces in infinitely variable transmissions
IPC: F16H13/14
Filed: 1973-02-09
Abstract: 1394307 Variable speed friction gear P I V ANTRIEB WERNER REIMERS KG 9 Feb 1973 [20 April 1972] 6467/73 Heading F2D In an infinitely variable transmission employing friction elements pressed together by a body adjustable in response to the transmitted torque, the adjustment of this body under increasing torque is limited by stops. In one form, an axially adjustable wheel 7, Fig. 2, coacts with a disc 8 mounted on needle bearings 9 on a shaft 10, which may be the output shaft, and loaded by a spring 19. Rotation of the disc 8 is transmitted by cam surfaces 14, 13 and balls 15 to a hub 11 which is axially slidable on, but keyed to the shaft 10 and supported by a dished spring 16, and when the axial force generated by the cam surfaces exceeds a predetermined amount the spring 16 yields and allows stops 20, 21, Fig. 3, at the ends of the cam surfaces to engage the balls. The spring 16, which may be such as to provide a reduced force on deflection, may be supported by a backing member 17, as shown, or by a hub fixed on the shaft 10. The cam surfaces 13, 14 may interact directly without the balls 15. Fig. 6 illustrates an arrangement in which a pair of oppositely directed cones 23, 24 mounted on parallel axes are interconnected by a friction drive ring 25 which is movable lengthwise of the cones by a claw 26 to vary the transmission ratio. When torque is being transmitted, the ring 25 distorts somewhat, thereby generating the force with which it is pressed against the cones, and such distortion is limited by engagement of the ring with either of a pair of fixed rollers 27, 28 which may be situated inside the ring, as shown, or outside.
Patent GB-179721-A (GB)
Title: Device for regulating the draught in stove, furnace and other flues
IPC: F23L11/02
Filed: 1921-02-26
Abstract: 179,721. Korngiebel, G. Feb. 26, 1921. Draught, regulating.-A check-draught damper device comprises a casing 4 of larger dimensions than the flue to which it is connected, in which casing the draught-operated damper 1 is suspended from a rocking-beam 3 having an adjust. able balance-weight 6. The casing shown is provided with three connections 11, 12, 14, for the flue, those not in use having covers 15. In the arrangement shown in Fig. 2 a partition wall 37 is provided, with which the damper 1 contacts in its lowest position. Fig. 3 shows a modification in which the casing 4 is arranged at one side of the flue connection 18 and is provided with a partition plate 19 having an opening for the flue gases controlled by a damper 31 connected to the damper 1. In another form a sliding-plate flue damper is suspended from the rocking-beam and may be adjusted in height by means of a screwed spindle.
Patent GB-416051-A (GB)
Title: Improvements in or relating to processes of and apparatus for purifying liquefied gases
IPC: F25J3/08
Filed: 1933-03-03
Abstract: 416,051. Separating gases by liquefaction. LINDE AIR PRODUCTS CO., 30, East 42nd Street, New York, U.S.A.-(Assignees of Moeller, W. F. ; 1165, Delaware Avenue, Buffalo, New York, U.S.A.) March 3, 1933, No. 6554. Convention date, April 23, 1932. Addition to 411,248. [Class 8 (ii).] In the process described in the parent Specification of separating certain impurities occurring in liquefied gases in quantities not great enough to affect the boiling point by partial evaporation in a heat-exchanger, the vapour being led off freed from the impurities the vapour thus purified is cooled and recondensed. Fig. 1 shows apparatus in which the liquefied gas is supplied to a heat-exchanger 10 through a pipe 11, the resultant vapour flowing away round the pipe 11 to a condenser wherein it flows through tubes 17 cooled, e.g. by liquid oxygen supplied and withdrawn through conduits 20, 21. Fig. 2 shows a rectifier in which liquid oxygen forming in the base and freed from the most volatile impurities which pass off in the vapours escaping by the pipe 37, is delivered, after expansion through a valve 31, through a distributer 32 to the top of the column and rectified therein. The liquid containing the impurities passes off by the pipe 38; the purified vapour passes off through the coil 41 wherein it is condensed.
Patent GB-963429-A (GB)
Title: Electronic binary parallel adder
IPC: G06F7/505
Filed: 1961-02-23
Abstract: 963,429. Parallel binary adders. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 23, 1961 [Feb. 24, 1960], No. 6616/61. Heading G4A. In a parallel binary adder the operands to be summed are divided into groups of digits and from each of these groups is obtained a provisional sum by adding together the digits of the augend and addend in the group, a carry generate signal which indicates that a carry from the group to the next group is generated by the addition, and a carry propagate signal which indicates that if there were a carry into the group from a lower group a carry out would be necessary. From the carry propagate and carry generate signals from all or sets of groups the in-carries to each group are determined and entered to produce the true sum. 64-digit numbers are added in the apparatus shown in Fig. 1 each number being divided into 4-digit groups. The addition of each group and the generation of the carry propagate and generate signals takes place in circuits 101.to 116. The apparatus described is restricted for design considerations to electronic and circuits having no more than four inputs and the carry propagate and generate signals from only four groups e.g. 101 to 104 are examined in one circuit e.g. 150. The output of circuit 150 is carry propagate and generate signals for the first sixteen digits of the operands together with in-carries for the groups of digits 5 to 8, 9 to 12, and 13 to 16. The carry generate and propagate signals from the sets of sixteen digits are examined in circuit 155 to produce incarries to the groups of digits 17 to 20, 33 to 36 and 49 to 52, and carry generate and propagate signals for the complete set of digits. These are examined in circuit 159 together with the in-carry C o  to the lowest order digit to position to produce a carry signal resulting from the addition. The true sum S1 to S64 is formed in circuits 131 to 146. The circuitry is built from the logical blocks described in Specification 872,251 and makes use of exclusive-or circuits. The typical circuits 101 and 131 are shown in Fig. 4. The input exclusive- or circuits +V p  determine whether both input digits of an order are binary one, and the input and circuits -A p  determine whether both are binary zero. These results are used to generate provisional sum digits, e.g. PS1 issues if one of A1 or B1 is binary one, PS2 if A1 and B1 are zero and one of A2 and B2 is binary one and so on. These sums are modified if C 0  is binary one. Then, if PS1 and C 0  are both applied to the first order output exclusive-or circuit, S1 does not issue. The carry propagate signal C p 1-4 issues if there is only one binary one at each input exclusive-or circuit.
Patent GB-557389-A (GB)
Title: Treatment of paper
IPC: D21H17/06
Filed: 1942-05-16
Abstract: 557,389. Treatment of paper. TOOTAL BROADHURST LEE CO., Ltd., MARSH, J. T., and TANKARD. J. May 16, 1942, No. 6653. [Classes 96 and 140] Paper is treated with a reactive aldehydic substance in the presence of a little acid, or potentially acid substance, to reduce the extent of swelling due to moisture and to increase wet strength. In an example, Kraft paper is treated with a solution including formaldhyde and ammonium chloride, dried at 40‹ to 60‹C. and heated for 2 minutes at 130‹C. The solutions used may also include acid-absorbing or buffer substances, wetting agents, softeners, waterproofing media, rubber latex &c. and the treated paper may be subjected to swelling agents, e.g. caustic soda, strong acids, zinc chloride, calcium thiocyanate, or cuprammonium hydroxide. After impregnation but before final heating, the paper may be glazed, embossed, crinkled, shaped, or mechanically treated &c. The paper may be made into string or yarn. Specification 557,182 is referred to.
Patent GB-1094324-A (GB)
Title: Improvements in or relating to epoxy resins
IPC: C08G59/42
Filed: 1965-02-17
Abstract: Polycarboxylic anhydride curable, modified epoxy resins having a high pot life/curing time ratio are produced by reacting a diglycidyl ether of bisphenol A containing alcoholic hydroxyl groups with not more than 2 weight per cent of metallic sodium. The reaction is preferably performed in the absence of oxygen and the product may be further modified by reaction with an amount of curing agent equivalent to the weight of the sodium derivative. Additional epoxy resin may also be added.
Patent GB-579684-A (GB)
Title: Improvements in office furniture
IPC: A47B91/00
Filed: 1944-04-12
Abstract: 579,684. Desks; tables. SAUNDERS-ROE, Ltd., and ROE, G. VERDON-. April 12, 1944, No. 6777. [Classes 52 (i), 52 (ii) and 52 (iii)] An office table consists of a pair of tubular metal U-shaped end frames 17 with horizontal bearers 17<1> connected by tubular connectors 12 supporting a removable table top 10. The top 10 has sockets 20, Fig. 11, carrying dowels 21 engaging bushes 120 welded into the supporting framework 12. Filing boxes or cabinets 16 may be suspended, beneath the top, from the supporting framework by screws 121, Fig. 11, engaging the bushes 120 and screwed into sockets 20 carried by the filing cabinets. Larger filing or drawer cabinets 13 may be supported on plinths 14, the cabinets being located by dowels. The drawers 22, Fig. 3, have angle section metal or plastic strips 24 running on and against metal strips 26, 25. Shelves 27, Fig. 4, have metal or plastic T-shaped edges 28 engaging grooves in the cabinets &c. According to the Provisional Specification the end frames 17 may be made of wood or plastic. Specifications 3,029/99, [Class 52], and 162,779, [Class 52 (i)], are referred to.
Patent GB-1502324-A (GB)
Title: Method for hydrating silicate glasses
IPC: C03B19/06
Filed: 1975-02-18
Abstract: 1502324 Hydrating silicate glass CORNING GLASS WORKS 18 Feb 1975 [25 Feb 1974] 6789/75 Heading C1M A glass body is made by subjecting an anhydrous glass, in the form of powder, granules, flakes, fibres, ribbon, thin sheets or foil, or in the form of a coating, the glass comprising, in mole per cent: 3-25% Na 2 O and/or K 2 O and 50-95% SiO 2 , the said oxides totalling at least 55%, and the balance, if any, consisting of other compatible oxides, to an H 2 O-containing gaseous environment having a relative humidity of 5-75%, and at a temperature above 100 C., for a time (e.g. 2-72 h.) sufficient to develop at least a surface portion having sufficient water therein to impart thereto the ability to flow at a lower temperature than the anhydrous glass. The glass produced preferably comprises 1-25% by weight of water, preferably the whole of the glass absorbing water. The treatment is preferably below the softening point of the glass (e.g. below 600 C.) The glass may also include at least 15% of one or more metal oxides, the metal(s) having a valency of at least 2, e.g. BaO, PbO, CdO, MgO, CaO, Al 2 O 3 , SrO, TiO 2 , ZrO 2 , MoO 3 , WO 3  or ZnO. The glass may be in the form of powder, granules, flakes, fibres or foils. The hydrated particles may be formed into a shaped mass under pressure, and at a temperature between room temperature and 500 C. (preferably 100-400 C.). The anhydrous glass may be applied to a substrate (e.g. in dry powder form or as a slurry in water or methanol) to form a coating, and the glass hydrated in situ so that the glass flows and coats the substrate (which may be steel, aluminium, ceramic or glass).
Patent GB-1028221-A (GB)
Title: Improvements in or relating to neutron absorber material
Inventor: NETTLEY PETER THOMAS
IPC: G21F1/02
Filed: 1963-02-20
Abstract: A high density ceramic body for controlling excess reactivity in a nuclear reactor (see Division G6) is made by mixing powdered lithium aluminate, china clay, and an organic binder, pressing or extruding, and firing at about 1350 DEG  C.
Patent GB-474341-A (GB)
Title: Improvements in subjective sight-testing
IPC: A61B3/02
Filed: 1937-03-10
Abstract: 474,341. Sight - testing apparatus. WHITWELL, A., and EMERSON OPTICAL & MANUFACTURING CO., Ltd. March 10, 1937, No. 7015. [Class 97 (i)] In subjective sight-testing there is employed a chart having a fan or fans of radial lines, in combination with a trial case lens having two different powers and so arranged that the subject can see part of the chart through a correcting lens of one power and another part through a lens of another power. The lines are ruled close together as shown in Fig. 9, the angle between adjacent lines being about 1‹. The distance from the centre O at which the subject can just resolve the lines depends upon his vision and trial case lenses are placed in front of the eve until this distance has been reduced as much as possible. To determine the best correction, the lens with two different powers is then used as shown in Fig. 10, so that part of the chart is seen through one half of the lens and part through the other, the subject being required to determine in which.part of the field the resolving point of the lens is nearer the centre O. The lens used may be a complete lens having two slightly different powers or it may be a half lens of small power. The fan may be divided into a number of sections which are arranged in one or more lines on a chart as shown in Fig. 11. To determine the axis of astigmatism of the subjects eye there is employed a lens having two different cylindrical powers in association with a chart comprising a single rotatable line which is set in accordance with information obtained from an ordinary astigmatism chart. The two power lens is then turned until the two parts P<1>, P<2> of the line seen in the two parts of the field are in perfect alignment, as shown in Fig. 8, the line itself being, if necessary, adjusted angularly in order to obtain this result.
Patent GB-609160-A (GB)
Title: Improvements relating to cathode ray tubes
IPC: H01J29/24
Filed: 1946-03-07
Abstract: 609,160. Cathode-ray tubes. COSSOR, Ltd., A. C., WYNN, A. H. A., and HILL, R. A. March 7, 1946, No. 7137. [Class 39 (i)] A cathode-ray tube comprises a spherical mirror 3, carried by the final anode 2 of the gun, by which an enlarged image of a fluorescent screen 12 is projected through the end window of the tube. The screen 12 is carried by arms 9, 10 and adjustable spacers 6, 7 on the edge of the mirror.
Patent GB-102574-A (GB)
Title: Improved Process of and Machinery for Forming Blocks of Metal Cuttings and the like for Melting Purposes.
Inventor: DAWKINS WILLIAM ARTHUR
IPC: B30B9/32
Filed: 1916-05-19
Abstract: 102,574. Dawkins, W. A. May 19,1916. Scrap, consolidating.-Small scrap metal is consolidated by using a tapered plunger. The scrap d is first compressed by the plungers b, c moving together, and then the latter alone is forced almost completely through the block a. A single hydraulic piston, with a suitable distance-piece, may be used to operate both plungers. The plungers may be combined in one, and the apparatus may be inverted and be provided with a clamped cover. Before inserting the scrap, it may be treated with liquid gum or cement.
Patent GB-555378-A (GB)
Title: Improvements in valves for internal combustion engines
IPC: F01L3/02
Filed: 1942-05-27
Abstract: 555,378. Steel alloys. RICH, G. R. May 27, 1942, No. 7188. Convention date, Feb. 18. Drawings to Specification. [Class 82 (i)] [Also in Group XXVII] A poppet valve has a head made of a steel alloy of high heat conductivity of the following composition:-C 0.2 per cent., Si 1.1 per cent., Cr 21.0 per cent., Ni 11.0 per cent., W 2.25 per cent., P 0.025 per cent., S 0.025 per cent., remainder Fe. The head is united to a stem having the composition C 0.3 per cent., Si 3.25 per cent., Mr 1.0 per cent., Cr 7.5 per cent., Mi 2.0 per cent., P 0.025 per cent., S 0.025 per cent.. remainder Fe with optional inclusion of 0.6 per cent. Mo.
Patent GB-1486392-A (GB)
Title: Data readout apparatus
IPC: H03G3/20
Filed: 1976-02-24
Abstract: 1486392 Automatic gain control NCR CORP and CONTROL DATA CORP 24 Feb 1976 [12 March 1975] 07194/76 Heading H4R In an apparatus for reading out data recorded on a magnetic recording medium a variable gain amplifier 24 has a comparator 32 coupled to its output to provide an indicator signal when the amplifier output exceeds a predetermined clipping level. During reading of a preamble signal recorded on the recording medium the gain of the amplifier is increased in discrete steps until the amplifier output exceeds the clipping level when the amplifier gain increase is halted, and a gate 30 at the output of a decoder 28 connected to the output of the variable gain amplifier 24 is enabled to allow read out of data at a fixed gain which provides clipping of the signal in the decoder 28. As described one of two alternative tracks may be reproduced selected by a switching circuit 16 connected to the head amplifiers 12 and 14. The selected output is fed through low pass filter 20, differentiator 18, and a further low pass filter 22 to the variable gain amplifier 24. The amplifier Fig. 2 has four stages each switchable between two gain values, e.g. of 1 and 1À2, by switching in or out of circuit an additional resistor 112, 124, 132, 140, arranged in the emitter collector circuit of the transistors 104, 116, 130, 134, which are arranged alternately as grounded emitter and grounded collector stages to simplify the coupling of the stages. Switching of the gain of the stages is effected by the output of counter 40 or 54, depending on which of tracks A or B is being read. During the preamble signal 5 kHz clock pulses on line 27 are counted by the counter, enabled by the signal on lines 39 and 53, until the amplifier gain is increased to such a level as the comparator 32 detects that a clipping level, set by the input to a clipping level selector 34, has been exceeded which causes the comparator output to be applied via OR gates 52 and 56 to lock the counter in the state existing at that time. Should the clipping level not be exceeded the maximum count of the counter generates a carry signal which is coupled back through the OR gate 52 or 56 to lock the respective counter in the maximum count condition, giving the maximum gain condition of the amplifier 24.
Patent GB-1109546-A (GB)
Title: Gelatine layers containing hardeners
Inventor: VENNER HAROLD ARTHUR LAKE
IPC: A23P30/40
Filed: 1966-02-18
Abstract: 1,109,546. Photographic silver halide emulsions. FOTOCHEMISCHE WERKE BERLIN VEB. Feb.18, 1966, No. 7263/66. Addition to 1,033,518. Heading G2C. Gelatine silver halide emulsions are hardened by incorporating a compound of the formula: - in which R is a -OCOR', -OR', -SO 3 R' or -N(R') 2  group wherein R' is an unsubstituted or substituted aliphatic, alicyclic or aromatic hydrocarbon radical. In an Example, 1: 3 -diglycidyl-5 -(yacetoxy-#-hydroxy-propyl)-isocyanurate in an aqueous solution is added to a gelatine silver bromoiodide emulsion, coated on a support and dried.
Patent GB-195370-A (GB)
Title: Improved electric hand iron
IPC: D06F75/24
Filed: 1923-03-14
Abstract: 195,370. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of MacFarland, A. M.). March 23, 1922, [Convention date]. Electric hand-irons.-Comprises the combination of a sole-plate 12, cover 14, a refractory plate 13 having a number of parallel recesses 24 in its lower surface, a resistance 25 located therein, terminal plates 26, 27 housed in recesses in the upper surface of the plate 13, and contact terminals 38 secured to the terminal plates and housed within an insulating block 42. A bolt 19 secures the cover carrying the handle 15 to the sole plate, and a spring 20 causes the refractory plate to press upon the sole plate.