baber/WOPTO huggingface dataset:
Patent GB-1115577-A (GB)
Title: Preparation of polyesters
IPC: C08G63/83
Filed: 1966-03-28
Abstract: In the manufacture of linear polyester by effecting an ester interchange reaction between a glycol and di-ester of a dicarboxylic acid and a monohydric compound and thereafter polycondensing the resulting glycol ester, there is used as an ester-interchange catalyst a manganous dioctate (e.g. the di-n-octoate, di-2-ethylhexoate, di-3-ethylhexanoate or di-2-propylpentanoate). As additional ester-interchange catalyst there may be used a compound of calcium, barium, strontium, magnesium, beryllium, zinc or cadmium, for instance, an oxide, a carbonate, a glycolate (e.g. that of ethylene-, 1:3-propylene or octylene glycol), a salt of a monocarboxylic acid (e.g. the acetate, propionate or octoate), a salt of a hydroxycarboxylic acid (e.g. the lactate, hydroxybutyrate or hydroxyvalerate), or a salt of a dicarboxylic acid (e.g. the malonate, succinate, adipate or pimlate).  As catalyst for the polycondensation reaction, there is preferably used an antimony compound (e.g. the oxide, acetate or glycolate).  Reaction may also be effected in the presence of the normal organic phosphite stabilizers.  The dicarboxylic acid reactant may be aliphatic or aromatic and the glycol may be a polymethylene glycol, an alkyl substituted polymethylene glycol, diethylene glycol, 2,2-bis - [4 - (beta - hydroxyethoxy) phenyl] propane or 1:4-cyclohexanedimethanol. Examples describe the reaction of dimethyl terephthalate with ethylene glycol or tetramethylene glycol.ALSO:In the manufacture of bis glycol esters of dicarboxylic acids by effecting an ester-interchange reaction between (a) a di-ester of a dicarboxylic acid and a monohydric compound and (b) a glycol, there is used as a catalyst a manganous dioctoate (e.g. the di-n-octoate, di-2-ethylhexoate, di-3-ethylhexoate or di-2-propyl-pentanoate). As additional ester-interchange catalyst there may be used a compound of calcium, barium, strontium, magnesium, beryllium, zinc or cadmium, for instance an oxide, a carbonate, a salt of a monocarboxylic acid (e.g. the acetate, propionate or octoate), a salt of a hydroxycarboxylic acid (e.g. the lactate, hydroxybutyrate or hydroxyvalerate), or a salt of a dicarboxylic acid (e.g. the malonate, succinate, adipate or pimelate).  Reaction may also be effected in the presence of the normal organic phosphite stabilizers. The dicarboxylic acid reactant may be aliphatic or aromatic and the glycol may be a polymethylene glycol, an alkyl substituted polymethylene glycol, diethylene glycol, 2, 2 - bis[4 - (beta - hydroxyethoxy)-phenyl] propane or 1 : 4-cyclohexanedimethanol. Examples describe the reaction of dimethyl tere-phthalate with ethylene glycol or tetramethy-lene glycol.
Patent GB-881775-A (GB)
Title: Automatic control device for lens diaphragm
IPC: G03B7/085
Filed: 1959-04-21
Abstract: 881,775. Photo-electric exposure control. ANGENIEUX, P. April 21, 1959 [May 7, 1958; June 16, 1958], No. 13532/59. Class 40(3). [Also in Group XX] Relates to photo-electric control for the automatic adjustment of camera diaphragm opening in which a galvanometer movable frame is connected to a shaped blade masking part of the lens aperture According to the invention a gate comprises an elongated slot in a fixed plate, the blade has a variable-width slot registering with the gate and their relative positions are such that the stop formed is always limited by at least one of the longitudinal edges of the gate and by the edges of the slot. Galvanometer 2 comprises a pivot 3 to which blade 4 with slot 4a is secured. Gate 5 is formed in a shutter 7, and its major axis is normal to axis 4c of the slot. The width of the stop under high ambient illumination is thus relatively large and diffraction effects are minimized. For manual stop control, projection 4b is engageable by a stud 10 on shutter part 7a so that as the shutter 7 is moved clockwise about its pin 6 blade 4 is concurrently swung counterclockwise to permit manual control by diaphragm 9, Fig. 3 (not shown). In further embodiments (i) the slot at its narrower end is covered by neutral screens of increasing absorption, Fig. 4 (not shown), (ii) the narrowest slot portion carries a single neutral screen of constant absorption and the slot has a widened portion where the screen effectiveness commences, Fig. 5 (not shown), (iii) a shorter slot is used so that the smallest stop is limited by the forward edge only of the gates, Fig. 6 (not shown), and (iv) the gate is narrowed in its central region to allow a longer slot opening, Fig. 7 (not shown). The invention may be applied to motion-picture cameras. Specification 429,676 is referred to.
Patent GB-742297-A (GB)
Title: Improvements in or relating to vehicles for transporting and delivering powdered or granular materials
Inventor: WILSON SYDNEY
IPC: B60P1/56
Filed: 1953-05-14
Abstract: 742,297. Vehicles provided with means for unloading granular material. BLAW KNOX, Ltd. March 5, 1954 [May 14, 1953], No. 13562/53. Class 78 (4). A blowing cylinder 9 receives granular material from the body of a vehicle through a valve 15, Fig. 1, which is then closed so that compressed air delivered through a pipe 14 can blow the material through a pipe connected to an outlet 10. The material is delivered to the inlet 8 of the cylinder 9 by air-assisted gravity conveyers 7, Fig. 2, which receive material from air-assisted gravity conveyers 3. The valve 15, and valves controlling the supply of air to the cylinder 9 and to the conveyers 3, 7 may be constructed and controlled as described in Specifications 712,067 and 740,118. The blowing cylinder may be carried on a weighing mechanism. According to the Provisional Specification the conveyers 3, 7 may be omitted and the body of the vehicle arranged for tipping by a hydraulic ram to deliver the material to the cylinder 9.
Patent GB-271869-A (GB)
Title: An improved process for the separation of alkali salts
IPC: C01D1/28
Filed: 1927-05-20
Abstract: 271,869. Weitz, E. May 20, 1927. [A Specification was laid open to inspection under Sect. 91 of the Acts, May 27, 1927]. Ammonium, potassium, and sodium salts of organic acids.-The separation of mixtures containing potassium or sodium salts of different acids, of those containing potassium and sodium salts of the same or different acids, or of those containing ammonium together with potassium cr sodium as cations, and organic or mixed organic and inorganic acid radicles as anions, is effected by treatment with ammonia in aqueous solution, the mixture treated being either in solution or in the solid state. The separation is based on the following facts :-that the solubility of ammonium potassium and sodium salts of polybasic inorganic acids, other than polythionates, and persulphates, is decreased by addition of ammonia, that of the potassium salts being most, and that of the ammonium salts being least affected; that the solubility of the corresponding salts of monobasic inorganic acids, other than fluorides and iodates, is increased or decreased only slightly by addition of ammonia, the increase being greatest for ammonium salts and least for potassium salts; and that the solubility of the corresponding salts of monobasic organic acids, such as formic, acetic, and hydrocyanic acids, is much greater than that of the corresponding salts of polybasic organic acids, such as ferrocyanic, oxalic, and succinic acids, and also greater than that of the corresponding salts of dibasic inorganic acids, when ammonia is added. In an example, a solution containing sodium carbonate and formate obtained in the synthetic production of sodium formate is treated with ammonia, the sodium carbonate being precipitated.
Patent GB-1322276-A (GB)
Title: Flexible heat pipe
IPC: F28D15/04
Filed: 1971-05-07
Abstract: 1322276 Heat pipes RCA CORPORATION 7 May 1971 [13 May 1970] 13638/71 Heading F4U A heat pipe comprises a flexible tubular envelope 11 containing a wick structure 17 saturated with working fluid, the wick structure comprising a first set of members 19 in transverse relation to a second set of members 21, with both sets extending transversely relatively to the longitudinal axis 14 of the tubular envelope 11. As shown, the first cross-members are orthogonol to and interwoven with the second cross-members, but they may be bonded at their cross-over points.
Patent GB-550581-A (GB)
Title: Improvements relating to electric discharge lamps
IPC: H01J61/86
Filed: 1941-10-25
Abstract: 550,581. Lead-in wires for electric lamps. BRITISH THOMSON - HOUSTON CO., Ltd., and BOURNE, H. K. Oct. 25, 1941, No. 13738. [Class 39 (ii)] The lead-in wires to the main and/or auxilary electrodes 4 of discharge lamps are brought together for connection to a single fitting such as a screw cap, by passing the wires through glass tubes 6 external to the bulb 1 and conforming to the contour of the bulb. The tubes may be sealed at 7 to the bulb to give strength.
Patent GB-554467-A (GB)
Title: Improvements in or relating to regulating arrangements for electrical circuits
IPC: G05F1/33
Filed: 1941-10-28
Abstract: 554,467. Automatic regulation. HARMER, H. M. Oct. 28, 1941, No. 13856. [Class 38 (iv)] A constant D.C. voltage is obtained from a single phase current supply by connecting two inductive reactances T 1 , T 2  in series across the supply one of which T 2  is cored with iron or magnetic alloy and run saturated and is in parallel with a capacitive reactance C the inductance and the other reactance being made to increase when the supply voltage increases and vice versa by a rectified current developed by windings n 1 , n z  on the two inductive reactances which are series connected and mutually reversed in phase and supplying a saturating winding such as mA. The several reactances are so related as to give an external capacitative reactance value and the voltages across the inductive reactances have a polyphase relationship ; these voltages are then rectified and applied to the load circuit R, for example by a Scott connection as shown in Fig. 4. Twin magnetically balanced inductances may be used for the inductance T,. A barretter may be paralleled across the A.C. input or the D.C. output of the rectifier providing the saturating current and a rheostat RA may be included for adjustment. A separate circuit comprising elements similar to T 1 , T 2 , C may be used to obtain the saturating current. Specifications 493,362, 515,207 and 524,565 are referred to.
Patent GB-651966-A (GB)
Title: Improvements in garments having elastic suspension means
IPC: A41F9/02
Filed: 1947-05-23
Abstract: 651,966. Netted fabrics. LASTEX YARN & LACTRON THREAD, Ltd., and BOULTER, D. H. May 23, 1947, No. 13858. [Class 74 (i)] [Also in Group VII] Tape for the waistbands of garments is of net formation and has an elastic middle and inelastic or less elastic edges ; elastic warp threads in the middle are kept tensioned during manufacture so that in the relaxed condition of the tape the middle is flat and the edges puckered. The middle may have a rough surface produced by twisting pairs of warp threads together or by incorporating square section bare rubber threads.
Patent GB-514560-A (GB)
Title: Improvements in or relating to films of rubber hydrohalide
IPC: C08C19/12
Filed: 1938-05-10
Abstract: 514,560. Rubber hydrohalide sheets. DINSMORE, R. P. May 10, 1938, No. 13909. [Class 70] A laminated sheet comprises one or more films of rubber hydrochloride which have been stretched longitudinally or laterally, or both, so as to retain a permanent stretch joined to unstretched film of rubber hydrochloride. The film may be joined by cement, e.g. of rubber hydrochloride, or by heat. Colour effects may be produced by joining films of different colours. Other rubber hydrohalides may be used.
Patent GB-566468-A (GB)
Title: Improvements in or relating to mechanical hammers
IPC: B25D17/06
Filed: 1943-08-27
Abstract: 566,468. Percussive tools. WOLF & CO., Ltd., S., and GUBBINS, C. H. Aug. 27, 1943, No. 14040. [Class 124] A piston-rod 20 is reciprocated within a barrel 22 by a hand-driven crank or by an electric motor 1, reduction gearing 15, and a swash-plate 16. A tool holder 25 is formed with an anvil head 27 and is normally held in a forward position by a spring 32, stops 28 and 31 limiting its movement. There is a slight clearance between the head 27 and a block 36 which is urged forward by a spring 37. The block 36 has a bore 39 to receive the reduced end 41 and conical head 40 of the piston-rod 20, and a transverse slot in which a plunger 42 is urged downwards by a spring 44. The plunger 42 has a conical perforation 43 to receive the. head 40 and a chamfered lower end 46 to co-operate with a cam-plate 47 formed integrally with, or secured to, the barrel 22. In the position shown, the plunger 42 has no driving connection with the piston-rod 20, and the block 36 is not moved, even if the electric motor 1 is started. When the tool'is pressed against the work, the tool holder 25 forces the block 36 rearwardly, the upper edge of the conical perforation 43 rides up the head 40, and the plunger 42 is raised until it passes behind the head 40 when it snaps down again. This couples the piston-rod 20 to the block 36 which is pulled rearwardly against the spring 37. The chamfered lower end 46 of the plunger 42 rides up a ramp 50 on the cam-plate 47 so that the plunger 42 is raised clear of the head 40, and the block 36 is forced forwards by the spring 37 to strike the anvil head 27. This is repeated so long as the tool is pressed against the work.
Patent GB-1299867-A (GB)
Title: Apparatus for radio-isotope clinical analysis
Inventor: BRITTON KEITH ERIC
IPC: G01T1/161
Filed: 1969-03-18
Abstract: 1299867 Apparatus for radio-isotope clinical analysis K E BRITTON and N J G BROWN 18 March 1970 [18 March 1969] 14167/69  Heading G1A Apparatus for radio-isotope clinical analysis comprising two detectors adapted to provide two electrical signals representative of radio-isotope radiation emitted from two different pre-selected parts of a patient's body, and analogue comparator means for comparing the signals and display means for displaying the output of the comparator means. In an embodiment, Fig.2, the apparatus is self contained in a couch described in application no Co-Pending 14166/69, in which detector 4R and a detector 4L are placed respectively on the back of the couch behind the area of a patient's right and left kidneys. A further detector 5 in front of the patient is directed towards the patients heart to provide a measure of blood background radiation, the patient having been given an intravencus injection of a material containing a radioisotope. The radiation sensed by each detector is fed via a pulse height analyser 7R, 7L or 8 to an integrating circuit 12 R, 12L or 13. Then the output from each kidney detector is fed with the output from the heart into a comparator amplifier 16R or 16L whose outputs are fed into a chart recorder thereby providing a radio-isotope renogram corrected for blood background radiation. The outputs from the dectors also operate a counter 10. In further modifications the ratio between the comparator outputs can be displayed VR/VL or the ratio of either to the sum of both VR/(VR+VL) can be displayed.
Patent GB-561969-A (GB)
Title: Production of esters of acrylic and methacrylic acid
IPC: C07C69/54
Filed: 1942-10-09
Abstract: Acrylic and methacrylic esters are produced by a continuous process in which an alcohol and the appropriate cyanhydrin and oleum are fed continuously to a reaction zone, the resulting ester-alcohol vapours being led to a rectifying column, an azeotropic mixture of some of the ester and all the alcohol is withdrawn from the top of the column condensed and returned to the reaction zone, and the rest of the ester is withdrawn from the lower part of the column.  A polymerization inhibitor is introduced into the various parts of the apparatus so as to be present throughout the process.  Specification 504,734 is referred to.
Patent GB-750322-A (GB)
Title: Improvements in or relating to curtain suspension rails
Inventor: SATCHWELL FRANCIS JOHN
IPC: A47H1/04
Filed: 1953-05-21
Abstract: 750,322. Suspending curtains. FRENCH & SONS, Ltd., T. May 21, 1954 [May 21, 1953 ; March 6, 1954], Nos. 14251/53 and 6615/54. Class 52(5). A curtain rail comprises a rail section, having a web and a runner-carrying flange, in combination with a tubular supporting section, the supporting section and at least the web being integral and formed from strip material and the web being wholly external to the supporting section. As shown, a curtain rail formed from a steel strip by rolling has a pointed, arched supporting portion 30, a double thickness web 33, and runner-carrying flanges 34 over which a C-section strip 35 is secured by rolling. In cubicle construction the rails are secured to walls or ceilings by sockets or are secured in alignment in pairs by clamps shaped to engage the arched portion of the rail, the ends of the rail being drawn together by clamping screws having tapered collars abutting the screw heads. Standard length bends are provided and as shown in Fig. 16 a straight clamp 78 has a side entry 79 for the bent end 80 of a rail section and sockets 81, 82 to clamp the ends of straight rail lengths 83, 84 which are aligned. The junction member a shown in Fig. 19 can be positioned anywhere on the bend so that the tangentially positioned rail g may be out of line with a straight rail h butt-jointed to the end f<SP>1</SP> of the curved rail f. Junction members for T- and X-form joints are also described. Specification 643,245 is referred to.
Patent GB-393077-A (GB)
Title: Improvements relating to foundry moulding methods and apparatus
IPC: B22C11/04
Filed: 1932-04-09
Abstract: 393,077. Moulding-machines. WILSON, P. H., 21, Trevose Gardens, Sherwood, RIDLEY, W., 18, Cromwell Road, Beeston, both in Nottingham, and STANTON IRONWORKS CO., Ltd., Stanton-by-Dale, near Nottingham. April 9, 1932, No. 14290. Divided on 393,055. Drawings to Specification. [Class 83 (i).] Comprises the means for resisting moulding pressure applied between core- or mould-box halves described in Specification 393,055.
Patent GB-1008790-A (GB)
Title: Refining steel
IPC: C21C5/56
Filed: 1962-04-20
Abstract: <PICT:1008790/C6-C7/1> Molten steel is continuously deslagged during a continuous heating and refining process carried out in an induction furnace 3 of elongated form.  The furnace is first warmed by burners and molten steel supplied from a ladle 1.  Additions such as aluminium, ferrosilicon or ferrochrome forming a slag 16 are continuously supplied along a spout 10.  Flames are projected in the direction 9 along the dome 5 to prevent solidification of the slag 16 which is removed through a lateral skimming door 11 upstream of a dam 6. An acid slag made from lime, silica and fluxes may be supplied along the spout 10 to fix alumina resulting from the deoxidation of the molten metal with aluminium before its introduction into the furnace.  In an alternative arrangement the acid slag is added downstream of the dam 6 and is removed through a further skimming door placed near the spout 7.  French Specification 1,249,887 is referred to.
Patent GB-1015381-A (GB)
Title: Lifting device for handling convection spacer discs and similar articles
Inventor: HICKS ROY
IPC: C21D9/00
Filed: 1963-04-10
Abstract: 1,015,381. Lifting devices for handling convection spacer discs. BROWN LENOX & CO. Ltd. April 6, 1964 [April 10, 1963], No. 14354/63. Heading B8H. Apparatus for handling convection spacer discs D used to separate stacked coils of strip metal C during heat treatment comprises four pivoted lifting pawls 30, 31 normally biased by connected weights 12, 32 freely sliding under gravity along a rod 13 into inoperative positions. Two pivoted catch levers 10, 11 are each biased into operative position by a push rod 40 freely sliding through a saddle 38 but pivot inwards as the apparatus is introduced into a stack of space discs D on a coil C to pass lips L on the spacer discs D. In position 1 (as shown) as the apparatus is lifted the catch levers 10, 11 engage under the lip L of the lowermost spacer disc I thereby lifting the weights 12, 32 and allowing the lifting pawls 30, 31 to engage under the lip L<SP>1</SP> of the second spacer disc. Since the weight of a spacer disc D is greater than that of the weights 12, 32 the outer end of catch lever 10 pivots downwards as the apparatus is lifted so that the lowermost space disc I is left on the coil C. A manually operated handle 20 has settings 2 and 3 in addition to the position 1 shown. In position 2 (Fig. 2, not shown) all the spacer discs D are released, while in position 3 (Fig. 3, not shown) all the spacer discs are lifted.
Patent GB-1452004-A (GB)
Title: Thermesthesiometer
IPC: A61B5/00
Filed: 1974-04-01
Abstract: 1452004 Measuring dermal temperature U.S.A. DEPARTMENT OF HEALTH, EDUCATION & WELFARE, SECRETARY OF:- 1 April 1974 [18 Oct 1973] 14408/74 Heading G1N A thermesthesiometer for indicating the dermal temperature that would be experienced if human contact were made with a heated surface comprises a probe having a cylindrical block 22 of a silicone-rubber compound having a thermal inertia substantially equal to that of human skin and of which the face 18 engages, in use, the heated surface; the probe temperature being maintained in use at that of the skin (33 C) by a control circuit including heater wire 10 and resistance thermometer 14, and a thermocouple 16 being disposed beneath the face 18 at a depth of 80-100 microns substantially equal to that of the dermal layer of human skin which layer is sensitive to thermal damage. The thermesthesiometer includes timing circuits to provide read-out of the temperature which would be experienced at the dermal layer within a given time of the skin contacting the heated surface, say 1, 2, 4 or 8 seconds. In an alternative embodiment, Fig. 5 (not shown), for use with other than flat heated surfaces a removable probe tip (37) having the required thermal/inertia is retained by clips 41 in a tip holder (23), the thermocouple (16') being disposed about 100 microns beneath the outer surface of the probe tip, and a probe body (22') against which the holder abuts having the required thermal inertia i.e. that of human skin. The probe is maintained at skin temperature i.e. 33‹C by a controller including heater wire (10') and resistance thermometer (14').
Patent GB-1147327-A (GB)
Title: Dynamo-electric machine
IPC: H01R39/38
Filed: 1966-04-01
Abstract: 1,147,327. Dynamo-electric machines. LEAR SIEGLER Inc. 1 April, 1966 [12 April, 1965], No. 14516/66. Heading H2A. In a dynamo-electric machine in which brush gear and a commutator, slipring or other current conducting surface operate wholly immersed in a liquid, such as a D.C. motor for driving a pump, the brush gear comprises a unitary brush body 22 having a passage 28 extending from the contact making surface 23, through the brush so as to transmit any pressure in the region of the end 27 of the passage to a region of different pressure and a brush box 24 which telescopically receives and holds the brush. As shown the passage 28 is central and the brush box 24 has an outlet 31. In a further construction (Figs. 5 and 6, not shown), the passage (40) is arranged diagonally such that the end (36) of the passage is positioned near the trailing edge of the brush where the maximum pressure would be exerted on a normal solid brush by the liquid film (37) as given by curve a. This pressure is used within the closed end of the brush box (42) in addition to the spring 43 to force the brush against the commutator 11. In a still further construction (Figs. 7 and 8, not shown), the contact making face of the brush is split in two by a groove (45) extending transverse to the axis of the commutator.
Patent GB-340198-A (GB)
Title: Improvements in tobacco pipes
IPC: A24F1/00
Filed: 1930-05-12
Abstract: 340,198. Delacour, A. May 12, 1930. Addition to 258,193. Tobacco pipes.-A central metal plug 3 which has a projecting nose 4 and a tubular extension 5 and enters the bore of the pipe stem is constructed in one piece instead of in two parts as described in the parent Specification. Specification 274,743 is referred to.