baber/WOPTO huggingface dataset:
Patent GB-1306695-A (GB)
Title: Tonometers
IPC: A61B5/352
Filed: 1970-05-28
Abstract: 1306695 Tonometers AMERICAN OPTICAL CORP 28 May 1970 [28 May 1969] 25865/70 Heading A5K [Also in Division H3] A device for controlling the operation of an air puff tonometer, comprises means 50 for sensing cardiac pulse signals, a ramp voltage waveform generator 52, responsive to the ouput of sensor 50 and generating successive ramp waveforms the generation of each of which is initiated by detection of a cardiac pulse signal and terminated by the detection of the following cardiac signal, means- 54 for deriving a voltage equal to the peak ramp waveform voltage, means 48 for deriving a voltage which is a selectable percentage of said peak voltage, and means 58 for comparing said selected voltage with the instantaneous ramp waveform voltage and, when the selected voltage and ramp voltage are equal, for supplying a signal to means 60 for actuating the firing of an air puff at a point in each cardiac cycle corresponding to the percentage of said peak voltage selected. A signal from a plethysmograph, or an EKG signal, is 'amplified and shaped by circuit 50 to produce short output pulses, the periodicity of which is that of the heart beat, which initiate discharge of a 0.5 mfd capacitor in the ramp generator 52 to terminate a ramp waveform. The output of generator 52 is passed to a peak reader 54, which derives a voltage equal to the peak value of the ramp voltage waveform, and to the coincidence detector 58. The output of peak reader 54 passes to a circuit 56, which derives a pulse rate reading which is displayed on a meter, and to a potential divider in circuit 48. An adjustable tap in circuit 48 applies a selected percentage of the peak ramp voltage to circuit 58, which, when coincidence is detected, fires a thyristor in circuit 60 controlling a solenoid, which, providing a tonometer trigger switch has previously been operated, then allows a fluid pulse to be fired at the eye for determination of the intraocular pressure. Adjustment of the tap in circuit 48 alters the time between the commencement of a cardiac cycle and the instant of intraocular pressure measurement in that cycle.
Patent GB-867063-A (GB)
Title: Tubular sheath for tension wires in prestressed concrete
IPC: E04C5/10
Filed: 1959-07-29
Abstract: 867,063. Prestressed concrete. METALLSCHLAUCHFABRIK PFORZHEIM VORM HCH. WITZENMANN G.m.b.H. July 29, 1959 [Aug. 16, 1958], No. 25981/59. Class 20(4) [Also in Group XXVIII] A tubular sheath for encasing tensioning wires &c. in prestressed concrete, comprises a corrugated tube 20 having a helical inwardly protruding trapezoidal sectioned corrugation 22 which is of a greater width than a helical outwardly protruding corrugation 23 to the ratio of 1À2: 1 to 4: 1, the width of the inner corrugation having a ratio of 1: 4 to 1: 10 to the inner diameter of the sheath, the inner diameter having a ratio of 1: 1À05 to 1: 1À25 to the outer diameter of the sheath and the outer diameter having a ratio of 1: 0À01 to 1: 0À004 to the wall thickness of the sheath. The inwardly projecting corrugation 22 may be provided centrally of its width with a narrow additional, inwardly projecting corrugation 24 which may be of semi-circular crosssection.
Patent GB-1121831-A (GB)
Title: Siloxane wetting agents
IPC: C09K23/54
Filed: 1965-06-21
Abstract: The invention comprises wetting agents which are siloxanes composed of only (a) one group of formula <FORM:1121831/C3/1> and (b) from 1 to 4 groups of formula <FORM:1121831/C3/2> where a is 0 to 2, b is 2 or 3, R is methyl or ethyl, R1 is an alkyl group of 1 to 4 carbon atoms, m is 3 or 4, n is 3.8 to 17, p is 0 to 5, the ratio of n to p is at least 2 to 1, (n+p) is 4 to 17, and the polyethyleneoxy group is attached to the silicon atom by at least 3 carbon atoms of CmH2m. Mixtures of up to 2 parts by weight of the siloxane with 100 parts of water and emulsions of from 10 to 50 parts of the siloxane and from 0.1 to 5 parts of a silicone oil of formula R311SiO(R112SiO)xSiR311 with 100 parts of water are formed, where R11 is a hydrocarbyl group and x is 10 to 1000.  R11 is typically an alkenyl, cycloalkenyl, alkyl, aryl, aralkyl, alkaryl, or cycloalkyl group.  The siloxanes are prepared by the reaction of a hydrosiloxane (containing Si-H) and an alkenyl ether of an alkoxy and hydroxy end-blocked poly(ethylene oxide) at 85 DEG  C. to 110 DEG  C., in the presence of a platinum catalyst and a solvent.  In Example I the siloxane (Me3SiO)2Si(Me)C3H6 (OC2H4)7.2OMe is prepared.  In Example XII, various pairs of reactants to produce the siloxanes are given. Comparisons are made with siloxanes containing up to 37 of the above (a) groups and having n less than 4.  Uses.-Additives for aqueous paints, adhesive compositions, printing inks, dyeing baths, and mould release compositions to improve their wetting properties.  Reference has been directed by the Comptroller to Specification 802,467.
Patent GB-785113-A (GB)
Title: Improvements in and relating to the treatment of leather diaphragms and the like
Inventor: CRUISE AMBROSE JOHN
IPC: C14C9/00
Filed: 1953-09-22
Abstract: Leather diaphragms are treated by impregnation with an aqueous or oil emulsion or dispersion of at least one monomeric ethylenically unsaturated compound that polymerizes upon the fibres and fibrils of the structure of the leather.  Suitable monomers are ethyl methacrylate, acrylonitrile and unsaturated polyesters; if desired a mixture of monomers may be used to produce a copolymer.
Patent GB-622122-A (GB)
Title: Improvements in or relating to thermostatic mixing valves
IPC: G05D23/13
Filed: 1946-08-31
Abstract: 622,122. Thermally - actuated valves. SHANKS & CO., Ltd., and SHANKS, G. M. Aug. 31, 1946, No. 26281. [Class 135] A thermostatic fluid mixing valve comprises in combination a flexible laminated bar exposed to the mixture in a casing, the laminations being bimetallic strips 1 spaced apart by washers 2, a cradle 3 shackled to at least one end of the bar, a control handle 5 for moving the cradle in the direction of flexure of the bar, and a valve 14 coupled to the bar near its point of maximum flexure. Rotation of the handle 5 turns a spindle 6 having an external thread 9 which shifts axially the internallythreaded sleeve 11, prevented from rotating by the pin 12 engaging the casing socket 13, to move the cradle against the helical springs 23. The bar is connected at both ends to the cradle and at its mid-point, by means of the sockets 17a and link 17, to a hollow piston 14 moving in a ported sleeve 15, the hot and cold fluids entering by the inlets 19, 18, respectively, and the mixture leaving through the outlet 20. The link 17 may carry a tell-tale 21 which can be viewed through an inspection window 22 for determining the position of the valve. In a modification, the bar is connected at one end to the cradle and at the other end to the piston, the cradle being rotated about a pivot against a leaf-spring by the control handle.
Patent GB-449005-A (GB)
Title: Improvements in or relating to cash registers
IPC: G06C7/10
Filed: 1934-09-14
Abstract: 449,005. Cash registers. BURROUGHS ADDING MACHINE CO., 6071, 2nd Boulevard, Detroit, Michigan, U.S.A. Sept. 14, 1934, No. 26397. Convention date, Sept. 15, 1933. [Class 106 (i)] Differential mechanism. The connections between the differential-mechanism and the totalizer-actuators of a cash register include means for imparting to each actuator a movement of fixed magnitude additional to each movement of variable magnitude imparted by the associated differential. The totalizer is permanently engaged with the actuators and driven through a pawl and ratchet, the additional movement being imparted to ensure the engagement of the pawl with the correct tooth of the ratchet. The invention is described as applied to a key set and operated machine of the kind described in Specification 449,004. Each totalizer wheel 24, Figs. 3 and 4, meshes with a ratchet wheel 55 having teeth 54 for co-operation with a pawl 53 on a pinion 49 permanently in mesh with an actuator 42. A toggle link 41 connects each actuator to a pitman 40 longitudinally positioned by the associated differential. In normal operations, the left-hand end of the pitman is guided by a pin 62 projecting into a cam-slot 60, the arrangement being such that the first step of movement of the pitman causes its left-hand end to ride upwardly from the position shown in Fig. 3 to that shown in Fig. 4. The toggle link is thus straightened and imparts to the actuator a slight movement in excess of the step imparted by the differential, with the result that the pawl 53 is rotated past the tooth 54<a> and its engagement with that tooth is ensured during the return of the actuator. Disabling totalizer-actuators in " Paid Out " transactions. In " Paid Out " transactions, a yoke 63 carrying the pins 62 is moved transversely to disengage the pins from the camslots 60 and allow the left-hand ends of the pitmen 40 to swing idly on the toggle links 41. For this purpose, the yoke is connected by a link 79, Fig. 2, to a lever 76, the cam-shaped lower end of which co-operates with the " Paid Out " key 70. Upon the return of the key, the restoration of the yoke is ensured by a pin 82 on the key, the cam-slots 60 being held in register with the pins 62 by the abutment of studs 80 on the pitmen with the pins. A latch 72 pivoted to the " Paid Out " key prevents depression of the key until a " preset " key has been depressed.
Patent GB-202542-A (GB)
Title: Improvements in and relating to tooth brushes
IPC: A46B15/00
Filed: 1922-09-30
Abstract: 202,542. Young, J. H. Sept. 30, 1922. Handles combined with other appliances.-In a tooth brush the end of the handle remote from the bristles b is formed with an enlargement d recessed to receive a mirror c. The mirror may be cemented in the recess, or part of the handle may be moulded around the bevelled edge of the mirror. The surface of the mirror may be flat or curved, in the former case being left with or extending above the surface of the handle. An extension beyond the enlargement may be provided, which is pierced with a hole for suspension of the brush.
Patent GB-172155-A (GB)
Title: Improvements in aluminium alloys and method of making the same
IPC: C22C21/12
Filed: 1920-09-16
Abstract: 172,155. Lavandeyra, A. de. Sept. 16, 1920. Drawings to Specification. Alloys.-Aluminium alloys for castings contain 6-8 per cent of copper, 1-2 per cent of nickel, and 0.25-1 per cent of magnesium, with or without small amounts of one or more of the metals cadmium, tin, and cobalt. In making the alloys, a rich alloy of nickel, copper, cobalt, cadmium, tin, and aluminium may be first made by melting the metals in the presence of a flux of calcium fluoride, charcoal, manganese dioxide, and arsenicus acid, and the final alloy is afterwards prepared from the required amounts of this rich alloy, aluminium, copper, and magnesium or a magnesium-aluminium alloy. A trace of manganese from the manganese dioxide mav be present in the alloy. Castings of the alloy may he heated for some time to 500-530‹ C., cooled in oil, and afterwards placed in hot water.
Patent GB-790258-A (GB)
Title: Improvements relating to hose suspender fittings
Inventor: NEWEY ARTHUR JOHN
IPC: A41F11/04
Filed: 1955-09-16
Abstract: 790,258. Hose suspenders. NEWEY BROS., Ltd. Aug. 23, 1956 [Sept. 16, 1955], No. 26523/55. Class 44 A hose suspender comprises a button assembly and a loop, the button assembly, mounted on a double tape 4, comprising a hollow stem 2 integral with the base plate 1 surmounted by an enlarged closed head 3, and a deformable button 6 forced over the head, the head being received in a recess 7 so that the head and button form a substantially continuous surface. The head and stem are passed through a hole 5 in the tape and the tape doubled back to cover the base plate 1. Specification 620,381 is referred to.
Patent GB-1420429-A (GB)
Title: Process for the preparation of impregnated fibre webs
IPC: D21H23/28
Filed: 1974-06-14
Abstract: 1420429 Latex impregnated webs CHEMISCHE INDUSTRIE AKU-GOODRICH BV 14 June 1974 [18 June 1973] 26540/74 Heading D2B A process for making a latex-impregnated fibrous web comprises forming a fibrous web on a papermaking machine, impregnating the web with a foamed heat-sensitive latex, and heating the impregnated web to coagulate the latex and dry the web. By the term "heat sensitive latex" is meant a latex which is made heat sensitive by the addition to it of a heat sensitizer in an amount such that it will coagulate at 35-95‹C. Preferably, the latex is applied to the web whilst the latter is on the screen of the papermaking machine. The fibres may be cellulosic, rayon, polyester, polyamide, polypropylene, or glass fibres. The latex may comprise polyvinyl chloride, polyvinylidene chloride; a homo- or co-polymer of a C 4-8  diolefin with styrene, an alkyl acrylate or methacrylate, acrylonitrile, N-methylol acrylamide or methacrylamide, or isobutene; or a homo- or co-polymer of one or more alkyl acrylates and/or methacrylates, optionally together with styrene, vinyl chloride, or vinylidene chloride; or chloroprene, or a mixture thereof. The latex may be made heat-sensitive by addition of a functional siloxane compound e.g. a siloxane oxyalkylene block copolymer or an organopolysiloxane. The latex-impregnated webs may be made into disposable sheets, garments, sanitary sheets, and used in the manufacture of leather-like materials.
Patent GB-406946-A (GB)
Title: Improved shooting spectacles
IPC: G02C5/00
Filed: 1933-09-27
Abstract: 406,946. Spectacles. JEANNERET, M., Amthausgasse, Berne, Switzerland. Sept. 27, 1933, No. 26570. Convention date, Sept. 27, 1932. [Class 97 (i).] In shooting spectacles comprising a disc 2 with a small aperture 3 mounted on a frame 1 so as to lie in the line of sight, the disc is so mounted on the frame and has such a diameter that it can be brought into the immediate vicinity of the eyeball. As shown, the disc is connected to the frame by a wire 4 which can be bent to adapt the spectacles to the wearer. The diameter of the disc is preferably about 8 mm. and that of the aperture is about 1 mm. The disc may be made of opaque material with a small aperture or of transparent material which is rendered opaque by frosting &c. except for a small central area. A second disc, without any transparent part, may be provided to cover the unused eye.
Patent GB-487118-A (GB)
Title: A method and device for winding threads or filaments of glass or similar substances
IPC: C03B37/03
Filed: 1937-10-01
Abstract: 487,118. Winding glass &c. threads. SCHLESISCHE SPIEGELGLAS-MANUFACTUR C. TIELSCH GES. Oct. 1, 1937, No. 26600. Convention date, Oct. 1, 1936. [Class 120 (ii)] Threads or filaments of glass or substances having similar properties are wound on to a spool in a layer of air separated from the outer air by a shell or jacket substantially concentric with the spool; currents and variations in the intensity of the static pressure conditions are thus produced in the air layer and tend to carry the thread or filament to be wound towards the spool. As shown the filament 6 formed by a glass particle 5 is carried thereby into an inclined channel-shaped member 12 leading to the space between the spool 7 and the concentric shell or jacket 13 from which space the air currents carry the filament to the spool, the particle 5 and any thick portion of the filament breaking away therefrom and being thrown out through an opening 17 in the jacket 13 ; when the spool is fully wound, a fresh spool is pushed along the shaft 11 to displace the wound spool and take its place so that winding is continuous. The spool has flanges 8 extending closely to the circumference of the jacket which may be provided with openings 16 through which air is drawn ; the openings are disposed in the axial direction of the spool. A number of filaments may be collected by a guide member 19 and wound as a bundle on the spool.
Patent GB-1032724-A (GB)
Title: Mixtures of granular or pulverulent components and finely divided phosphates
Inventor: TESCHE KURT
IPC: B01J19/06
Filed: 1963-06-04
Abstract: Granular and/or pulverulent substances, which cake or agglomerate on exposure to moisture, are rendered free-flowing by the addition thereto of phosphates having an average particle size less than 0.03 m , the phosphates being sparingly soluble in water, inert to the above substances, and existing substantially in the ortho form.  The phosphates may be made by spray-drying, at 190-450 DEG  C. in air or combustion gases, a solution or suspension of divalent metal or aluminium salts of strong acids, or mixtures thereof, in orthophosphoric acid.  The divalent metal may be calcium.  The granular and/or pulverulent substances sensitive to moisture may be fertilizers, e.g. NH4NO3, or a fertilizer comprising 13% N, 13% P2O5, and 21% K2O, or flowers of sulphur, or common salt.ALSO:Phosphates having an average particle size less than 0.03m , and which are sparingly soluble in water and exist in the ortho-form, are used as a lubricant in tablets and as a carrier for active substances e.g. fungicides, herbicides-trace elements. The phosphates may either be impregnated or admixed with the active substances.  The phosphate may be Ca3(PO4)2.  Flowers of sulphur may be rendered free-flowing by incorporation of said phosphates.  Phosphates impregnated or admixed with active substances may be added to cereals or fertilizers.
Patent GB-246415-A (GB)
Title: Improvements in or relating to the separation of hexamethylene-tetramine from ammonium chloride
IPC: C07D487/18
Filed: 1925-10-23
Abstract: 246,415. Wade, H., (Karpen & Bros., S.). Oct. 23, 1925. Hexamethylenetetramine.-A mixture of hexamethylenetetramine and ammonium chloride resulting, for example, from the reaction between methylene chloride and liquid ammonia or an aqueous solution thereof, is treated with an aqueous solution strongly charged with ammonia, whereby the ammonium chloride is dissolved and removed and the hexamethylenetetramine separated therefrom. As shown in Fig. 1, a mixture of the wet or dry compounds in an extractor C is treated with a solution of ammonium chloride, surcharged with ammonia from a tank A, and drawn from a tank D. The solution dissolves some ammonium chloride in the extractor and passes to a still H, where the ammonia is distilled off and returned through a condenser I to the tank A. The remaining solution is then passed to a cooled tank J, where much of the ammonium chloride is precipitated, and then to a filter K, from which the solution is returned to the tank D by pipes M. Q whilst the precipitate is washed by water from a tank L, before being passed to a dryer S and tank T. The wash water from the filter passes to an evaporator N, whence any ammonia is returned to the condenser I by a pipe O, surplus water is returned to the tank L, and the solution,' after concentration, is returned to the tank D by pipes P. Q. The cycle of operations is repeated until all ammonium chloride. is removed from the extractor C, and the hexamethylenetetramine remaining is then passed to a filter E, whence the filtrate is passed to the still H whilst the hexamethylenetetramine is washed with aqueous ammonia from a tank B before being passed to a dryer F and tank G. The vapours from the dryer F pass through a condenser V back to the tank B. The ammonium chloride from the filter K, instead of being dried and stored, may be. passed to an ammonia recovery plant. The pro. duction and extraction of the mixed compounds from aqueous solutions of methylene. chloride and ammonia, using a large, excess of the latter, is described. Specification 235,015 is referred to.
Patent GB-1342026-A (GB)
Title: Ballast for gas discharge lamp
IPC: H05B41/04
Filed: 1971-04-19
Abstract: 1342026 Starting and operating discharge lamps W ZUMTOBEL 19 April 1971 [9 April 1970] 26636/71 Heading H2H A circuit for starting and operating a preheated electrode discharge lamp is adapted to cause the electrodes to heat to a suitable temperature and then to apply a series of high voltage pulses to start the lamp, and also, in the event of non-ignition, to cease the application of the pulses for a short period and then to continue therewith. As shown, a lamp 6 having electrodes 4, 5 is connected at1, 2 across an A.C. source, the electrodes being in series with inductors 7a, 7b and shunted by a series circuit comprising a third inductor adapted as an auto-transformer 8, 9, and a capacitor and resistor 23, 24. Also in shunt with the lamp is a control circuit adapted to selectively operate a triac 3 connected between the windings of the transformer 8, 9. In operation, upon the A.C. supply first being connected, the trigger voltage of a diac 37 is reached near the start of each ¢ cycle by the action of a capacitor, resistor branch 28, 33, and a resistor 38, which causes the triac 3 to conduct for most of each ¢ cycle to provide a low impedance path via the coil 8 so that a high current is drawn through the lamp electrodes to heat them rapidly. Simultaneously, a capacitor 30 is charged during each half cycle under the action of a bridge formed by diodes 29, 32, 34, 35 and the rising potential across this capacitor causes the switching instant of diac 37 to be progressively displaced towards the peak voltage of each ¢ cycle. At the instant of switching, capacitor 23 charged during the preceding part of the ¢ cycle discharges rapidly through the primary winding 9 causing a high voltage pulse to be produced in the secondary 8. As the instant approaches the peak voltage point, these pulses are sufficient to ignite the lamp 6. In the event of ignition failure, the potential across capacitor 30 exceeds the threshold voltage of the diac 37 so that no triggering of the triac 3 takes place. Capacitor 30 during this period discharges slowly via a resistor 31 so that a second series of igniting pulses may be produced a short while later. The time constants of the control circuit are adapted such that the rate of charging at 30 is proportional to the rate of increase of temperature of the electrodes 4, 5, and the discharge rate is proportional to the rate of cooling.
Patent GB-1055241-A (GB)
Title: Improvements in or relaitng to vitreous materials
IPC: C03C11/00
Filed: 1963-07-04
Abstract: Vitreous cellular material is made by heating an intimate mixture of vitreous base material (1) and a gas-generating substance, (2) in particle form.  Where B and G are the volumes, and (b) and (g) are the average particle diameters, of (1) and (2) respectively, then <FORM:1055241/C1/1> The mixture may be moistened and compacted; a non-melting coating may be applied during compaction to prevent subsequent adhesion to the furnace.  The velocity of travel through the stoving furnace preferably varies throughout the furnace; for example, several conveyer belts having different velocities may be used.  The pieces preferably advance intermittently through the furnace. Complete or partial fixed or movable partitions may enclose each piece between steps, thus securing a determined temperature. Cooling is performed by contacting the piece with thermally conducting material, which may be shaping rollers.  The raw material may be treated with enamel which fuses at the same time as the raw material; the enamel may be of the same vitreous material as that of the mixture.  Cuts or fissures may be formed in the enamel while molten to produce a variegated or cracked effect.  The furnace temperature may be raised to such an extent that the surface breaks open and becomes covered with crater-like partial perforations. The material may be shaped or cut after expansion before or after it has hardened.