baber/WOPTO huggingface dataset:
Patent GB-1206904-A (GB)
Title: Process for the production of polyamide fibres having high linear strength and knot strength
Inventor: KOEHLER ARMIN
IPC: D01F6/60
Filed: 1969-05-09
Abstract: 1,206,904. Stretching polyamide filaments. FARBENFABRIKEN BAYER A.G. 9 May, 1969 [1 June, 1968], No. 23709/69. Heading B5B. Melt-spun polyamide monofils are stretched at a ratio of 1: 4À5 to 1: 6À5 within a time of 3-10 seconds while the monofils are in contact with a temperature 25-35 C. below the crystallite melting point of the unstretched polyamide as measured by differential thermoanalysis with a heating rate of 4 C./min., to obtain a product in which the monofils have a diameter below 1À5 mm. Examples and/or working temperatures are given for polycaprolactam and nylon 11, 12, 6-6, 6-11 and 6-11-12. The products have high linear and knot strength.
Patent GB-302209-A (GB)
Title: Improvements in rules, measuring gauges and the like
IPC: G01B3/04
Filed: 1927-09-12
Abstract: 302,209. Preston, C. H. Sept. 12. 1927. Drawings to Specification. Slide-rules.-A slide-rule cursor formed from sheet metal blank bent to encircle the rule is provided with one or more integrally formed spring tongue pieces pressed out of the metal and adapted to grip the rule
Patent GB-1427256-A (GB)
Title: apparatus for measuring thermal conductivity
IPC: G01N25/18
Filed: 1973-05-19
Abstract: 1427256 Thermal conductivity determination RUBBER & PLASTICS RESEARCH ASSOCIATION OF GREAT BRITAIN 19 May 1973 24010/73 Heading G1D Apparatus for determining thermal conductivity comprises a metallic disc-shaped heat source 10 which is embraced around its circumferential peripheral surface by an annulus 14 of equal thickness to the heat source 10 but of relatively lower thermal conductivity, the heat source 10 and annulus together dividing a cylindrical cavity 16 formed in a surrounding heat sink 18 into two equally dimensioned disc-shaped cavity portions 16a, 16b for receiving correspondingly shaped samples whose thermal conductivity is to be determined. As shown, the heat source is provided with an electrical heating element 12 and thermocouples are arranged to sense the temperatures of the surfaces 9 and 26 of the heat source 10 and sink 18 respectively. End-plates 22a, 22b to which a central cylindrical portion 20 of the heat sink 18 is bolted are provided with conduits 24a, 24b for supplying fluid under pressure to the cavity portions 16a, 16b to pressurize samples under test when in the molten phase. The heat sink 18 is heatable by controllable electric heaters.
Patent GB-376535-A (GB)
Title: Change-speed gear mechanism
IPC: F16H3/24
Filed: 1931-08-27
Abstract: 376,535. Change - speed gearing. RILEY, P., Riley Engine Co., Aldbourne Road, Coventry. Aug. 27, 1931, No. 24103. [Class 80 (ii).] Change-speed gearing with aligned driving and driven shafts 1, 3 and a layshaft 13 comprises an outer key 6 upon an inner key or dog 5 fast on the shaft 3. Where straight spur gearing is used, both keys are straight, but the invention is described in an arrangement with single-helical gears in which the key 6 is helical to balance the end thrusts on a sliding helical gear 8 or double gear 8, 16. The gear 8 transmitting power through the key 6 slides over a double-ended clutch sleeve 2, which engages the key 5 by means of a slot 4. When the sleeve 2 is slid to the left, the shaft 3 is driven directly through a clutch 10, the sleeve 2, and the keys 5. Movement of the sleeve 2 to the right clutches at 14 a loose gear 12<1> to the shaft 3, so that the drive is through a train 11, 11<1>, 12, 121. The end thrusts on the layshaft 13 are opposed and balance. With the sleeve 2 in mid position, other two speeds are effected by sliding the double gear 8, 16 to left and right into mesh with gears 17, 15 on the layshaft. The end thrusts on the double gear, and on the lay shaft are again substantially balanced. For reversed driving, a helical gear 18 on the layshaft drives a helical gear 19 fast on a reversing shaft 20, Fig. 3, which carries helical splines 21 on which a helical pinion 22 is slidable into mesh with the gear 8. The end thrusts on the layshaft 13 are opposed and so are those on the pinion 22, but the end thrusts on the shaft 20 are not opposed. Specification 257,413, [Class 80 (ii), Gearing, Variable-speed &c.], is referred to.
Patent GB-597144-A (GB)
Title: Improvements in or relating to synthetic resinous adhesive compositions
IPC: B65D6/14
Filed: 1945-09-18
Abstract: A resinous binder for bonding wood, laminated plastics and metal plates, comprises from 10 to 100 parts by weight of a soluble partial reaction product of 1 mol. of a polyhydroxybenzene having at least two hydroxyl groups in the 1-, 3-, 5-positions and from 1 to 1.17 mols. of formaldehyde in the form of a solid polymer, combined with 100 parts by weight of a vinyl thermoplastic resin.  The partial reaction product is prepared by refluxing the polyhydroxybenzene and solid polymer of formaldehyde in substantially anhydrous methanol or ethanol in the presence of a catalyst in an amount of less than 1 per cent of the weight of the polyhydroxybenzene, the catalyst being neutralized after the reaction.  The vinyl resin may be vinyl acetate, vinyl acetate-butyrate, polyvinyl alcohols, particularly those produced from a vinyl ester hydrolysed less than 50 per cent, polyvinyl formal, polyvinyl acetal, polyvinyl butyral and simple substituted vinyls such as acrylates, methyl- and propyl-methacrylates. Suitable polyhydroxybenzenes are resorcinol and phloroglucinol, 1,3-polyhydroxybenzenes with one methyl, ethyl or other group attached to the benzene ring.  The catalyst may be a mineral acid, a strongly acid-reacting salt, such as ferric chloride or a basic substance.  In the preparation of the phenol-formaldehyde resin, resorcinol, paraformaldehyde, anhydrous methyl or ethyl alcohol and hydrochloric acid are heated at about the reflux temperature of the alcohol until a clear viscous resin results, when the viscosity is adjusted by the addition of alcohol and the acid catalyst neutralized with alkali.  In the examples: (1) a resorcinol resin solution in methanol having a 60 per cent solids content was mixed with polyvinylacetate of medium molecular weight dissolved in acetone; (2) a similar resin solution was combined with a high molecular weight polyvinyl acetate in acetone, in (3) low molecular weight polyvinyl acetate dissolved in benzene/ethanol solution was mixed with a 60 per cent solid content resorcinol formaldehyde resin in ethanol.  Up to 10 per cent of a basic hardening catalyst such as ammonium hydroxide, ethylene diamine and hexamethylenetetramine can be added to the above compositions.  In example (4) 15 per cent hydrolysed polyvinylacetate of medium molecular weight dissolved in a mixture of equal parts of acetone and ethyl acetate to yield a 20 per cent solution was combined with a 50 per cent resorcinol-formaldehyde resin solution in ethanol.  In the Specification as open to inspection under Sect. 91, acetaldehyde or butyraldehyde may be used in the condensation in place of formaldehyde.  This subject-matter does not appear in the Specification as accepted.
Patent GB-393254-A (GB)
Title: Method of producing nitrogenous compositions
Filed: 1931-08-27
Abstract: The nitrogen content of nitrogen-containing carbohydrate derivatives such as are produced by the process of Specification 393,242 is increased by reacting with amino acids or their anhydrides, chlorides, salts, or esters, particularly the amino acids having a polypeptide structure obtained by the decomposition of albumen.  The amino acids may be replaced by chlorcarbon acids in admixture with ammonia derivatives.  In examples, (1) cotton is steeped in acetic acid containing sulphuric acid and urea, and then esterified in a mixture of acetic anhydride and nitric acid; the methyl ester of glycocoll chlorhydrate is then added.  (2) Horn, wool or horn shavings or dust is steeped in methyl alcohol lye and treated with acetyl chloride; to the product is then added the cellulose derivative obtained as in (1).  (3) The acid cellulose derivative of example (1) is heated with the methyl ester of glycolalanine chlorhydrate.  (4) The product of example (1) is dissolved in acetone and treated with glycocoll ester after first adding ammonium carbonate.  The products may be employed for the production of filaments or films, and as insulating materils.
Patent GB-1212608-A (GB)
Title: Apparatus for mechanically handling cylindrical articles
Inventor: COE PETER FREDERICK
IPC: B65G17/06
Filed: 1968-05-21
Abstract: 1,212,608. Conveyers. UNILEVER Ltd. 20 May, 1969 [21 May, 1968], No. 24133/68. Heading B8A. Cylindrical articles are rotated and conveyed by cylindrical rotors, transfer of an article between valleys formed between the rotors being caused when a pressure pad is lowered into frictional engagement with the article. In a cooker for heat treating the contents of cans 29, rotors 2 are chain driven and are arranged in four tiers. Each tier is provided with double lock sliding doors 9-12 and, adjacent an inlet gate 13, there is a pressure pad 14 pivotally mounted in a block 15. A can input bar 17 extends across the ends of the rotors. At the discharge end of the cooker, a can discharge bar 22 which is magnetic is reciprocable across a discharge platform 20 along which a plough 24 may travel. Each can from an inlet passage 7 is rotated by rotors 2a, 2b, the pad 14 is lowered and the can is advanced with a planetary motion to the valley between rotors 2b and 2c. To improve engagement with the cans, the pad 14 and rotors 2 have rubber or like material 31, 32 on their surface. As the pad 14 is lowered the gate 13 is raised to allow the next can to roll into contact with an escapement blade 30. When a can is in each of the valleys the input bar 17 moves the cans along the rotors to permit more cans to be fed into the valleys. Cans at the discharge end of the valleys are drawn on to the platform 20 by the magnetic bar 22 and are pushed into a discharge passage 8 by the plough 24, the cans passing out through locks 11, 12. In a modification, Fig. 5, cans rolling side by side down a surface 40 are controlled by a gate 42 prior to engagement by a pressure pad 43 of which one end 44 forms an escapement blade.
Patent GB-1316153-A (GB)
Title: Friction welding apparatus
IPC: B65B51/22
Filed: 1970-06-01
Abstract: 1316153 Seaming non-metalic sheet material KOEHRING CO 1 June 1970 24138/72 Divided out of 1316151 Heading B5K The subject-matter is identical to that disclosed in Specifications 1,316,151 and 1,316,152 but the claims relate to friction welding apparatus having pairs of vertically aligned upper and lower part holders on a carrier means mounted for movement in a path of travel, stationary depressible support means (58), Fig. 2 (not shown), for parts provided in the path of the upper holders to assist in moving the parts into the upper holders, and means for transferring parts to the depressible support means.
Patent GB-627943-A (GB)
Title: Improvements in or relating to driving mechanisms for conveying intermittent motion
IPC: G04B1/22
Filed: 1947-09-01
Abstract: 627,943. Clocks. WHIDBOURNE. H. Sept. 1, 1947, No. 24156. [Class 139] [Also in Group XXIV] Mechanism for converting rotary motion into intermittent motion, e.g. to close a pair of contacts at predetermined intervals in synchronous clock mechanisms, comprises a driving shaft 2 loosely carrying a collar 3 to be driven, and a spiral spring 1 surrounding the shaft 2, one end thereof being connected at 10 to the collar 3 and the other end being formed as a tangential tongue 4 engaging a ratchet wheel 5 adapted to drive an escapement mechanism. As shaft 2 rotates, the convolutions of the spring 1 are distended, and act as a slipping clutch to convey a relatively light torque to the ratchet wheel 5 and drive the escapement. As the wheel 5 rotates under the control of the escapement, the tongue 4 will slip off the tooth thereof and the convolutions of the spring will contract to grip the shaft and drive the collar 3 until the tongue again contacts wheel 5. Collar 3 may operate a cam to close the circuit of an electrical relay at predetermined time intervals. A supplementary spring 6 with a tongue 7 may drive a secondary ratchet 8 rigid with ratchet 5 but with staggered teeth to give a smoother drive.
Patent GB-280001-A (GB)
Title: Improvements in brake mechanism
IPC: F16D65/22
Filed: 1926-09-30
Abstract: 280,001. Marks, E. C. R., (Christensen Air Brake Co.). Sept, 30, 1926. Brakes. arrangement and disposition of, and braking. -An internal - expanding brake comprises two shoes 6 between the adjacently disposed ends of which are arranged a fluid-pressure motor 8 and a manuallyoperable cam 9 adapted for independent operation. The shoes are connected intermediately to the supporting plate 7 by links 14, connected to the shoes and the plate by bolts and distance-pieces acting as bearings for the links 14. The brake may be used as a transmission brake, in which case it is mounted on the front of the rear axle housing and acts on the pinion shaft of the axle. The fluid-pressure motor comprises a two-part cylinder held together by studs 23 and containing two oppositely-disposed pistons, the rods of which engage the ends of the brake shoes by means of enlarged heads 27 acting as stops for the pistons in their innermost position and having slots engaged by T-shaped members screwed in the ends of the shoes. The T shaped member may be adjusted in the shoes by turning the heads 27 and locked in position by lock-nuts 34. When mounted on the front of the rear axle casing of a vehicle, the brake drum 44, Fig. 3, is detachably secured to a flanged member 46 fast on the pinion shaft 43 of the driving mechanism of the rear axle, which is connected through a flexible joint 47 with the transmission shaft 49. The plate 7 is annular in form and is clamped over a shoulder on a screw-plug retainer 50 for a ball bearing of the pinion shaft by a plate 59, and studs 58. To prevent rotational movement, a stud 61 passes through an opening in the plate 7 and is screwed in the retainer cap 52 for the bearing of a jack shaft comprised in a certain construction of rear axle, or the stud may be welded to the rear axle housing. The plate 7 may be connected directly by screws to bosses on the rear axle housing and the retainers dispensed with. The cam is operated by bevel gears and is provided with shoulders to locate the brake shoes laterally. The operating lever 66 may be positioned so as to project upwardly or downwardly.
Patent GB-638833-A (GB)
Title: Improvements in and relating to electric-discharge-tube apparatus
IPC: G01T1/18
Filed: 1947-09-02
Abstract: 638,833. Detecting gamma radiations. FRANKLIN, E. Sept. 2, 1947, No. 24253. [Class 37] [Also in Group XL (b)] In a device for detecting gamma radiations a Geiger-Muller tube (or other device sensitive to gamma radiations) is arranged to trigger a cold cathode valve causing a condenser to discharge through the valve until it blocks, whereupon the condenser recharges through an integrating circuit containing a meter to indicate the sum of the charging pulses. As shown, ionization of the Geiger-Muller tube cause positive pulses to appear across resistor 11 which are applied to the normally biassed trigger electrode of the cold cathode valve 7 by way of condenser 8. The trigger-cathode gap is broken down, the trigger current being limited by resistor 6. This limiting of the trigger-current reduces the recovery time. Condenser 16 then discharges through the main gap and the tube is extinguished, resistor 9 being of too high a value to allow discharge to continue via battery 10. The condenser charging pulses are then integrated by condenser 15 and resistor 13 and indicated on meter 14. If the Geiger-Muller tube is not of the self-quenching type the connection to the bias position on battery 10 may be removed and the upward voltage excursion of the trigger - electrode produced when the cold cathode valve fires may be used to quench the tube. If it should be desired to earth the cathode of the Geiger-Muller tube the output signal must be taken from its anode. It is stated that it has been found possible to employ a cold cathode valve in which the trigger electrode is situated close to the anode so that discharge takes place when the anode of the Geiger-Muller tube pulses negatively. The cathode load resistor 9 is now replaced by an anode load resistor and the downward voltage swing produced at the trigger electrode when the valve fires used to quench the Geiger- Muller tube. An arrangement is described wherein three Geiger-Muller tubes are employed so as to increase the overall triggering rate. Each of these tubes has a circuit as shown in the Figure, but they all share the same integrating circuit and meter. Each condenser 16 is in five parts any one of which may be switched into circuit to vary the counting rate ; and since the accuracy of the instrument depends on the product of the counting rate and the integrating time, the circuit constants of the integrating circuit are varied by the same switch to maintain the same accuracy. A further condenser, switched in and out of the meter circuit provides a choice of two accuracies. The Geiger-Muller tubes may be arranged in a hand probe in which the tubes are grouped round a central cavity in which the specimen may be placed. Specification 421,341 is referred to.
Patent GB-386354-A (GB)
Title: Improvements in electromagnetic relay mechanism responsive to voltage control
IPC: H01H47/00
Filed: 1931-08-28
Abstract: 386,354. Charging and discharging batteries ; automatic regulation. WETZER, R., Pfronten, Bavaria, Germany. Aug. 28, 1931, No. 24266. Convention date, Feb. 9. [Class 38 (iv).] A voltage-controlled relay has a contact member adapted to close two contacts at maximum and minimum voltage respectively, thereby varying the current in the relay coil by cutting a resistance out or by placing a resistance in parallel with the relay circuit so as to increase the contact making pressure exerted by the contact member, the two resistances acting as windings of an electromagnetic switch controlling contacts whereby the resistance in a controlled circuit is varied. This circuit may control the voltage of a dynamo or the charging current of a battery. As shown in the Figure, the moving coil a of the relay R is normally connected across a battery b in series with a resistance w2 and a resistance w1 forming one of the energizing coils of a polarized relay P. When the voltage of the battery rises sufficiently the contact arm c is moved against the bias of the coiled springs m, m<1> to engage a contact d and cut out the resistance w1 from the circuit of the relay coil so increasing the current therein and the contact pressure. As the current in coil w1 has been repelling the adjacent polarized end of the pivoted armature of relay P, on its cessation the armature may be moved to engage a fixed contact q which cuts in a resistance h in series with a normally connected resistance g in the charging circuit from the source k so reducing the value of the charging current. On a sufficient reduction of the battery voltage the relay P is restored to the position shown but on reduction of the voltage below a predetermined minimum the contact arm c is moved to engage a fixed contact e so connecting the coil w3 of relay P in parallel with the moving coil a of relay R and by reducing the current in the latter enabling the contact pressure produced by springs m, m<1> to be increased. The energization of the coil w3 causes the armature of relay P to be moved again to the position shown so cutting out the resistance h from the charging circuit. Similar arrangements may be employed in connection with thermostats.
Patent GB-967434-A (GB)
Title: Improvements in or relating to image display devices
IPC: H01L31/14
Filed: 1960-07-12
Abstract: <PICT:0967434/C4-C5/1> An image display device comprises means to supply electric signals to a cathode-ray tube 1 having a luminescent screen 4 arranged so that the luminescent output of the screen constitutes the input radiation of an image intensifier 7 comprising electroluminescent elements 10 and photo-conductive elements 17 in an insulating binder connected in an electric circuit in series with means 22 for supplying alternating voltage, each electroluminescent element being associated with two photo-conductive elements, and rectifying means 20, 21 or battery means to supply biasing direct potentials of different polarities to the two photo-conductive elements, the luminescent screen 4 of the cathode-ray tube comprising a single phosphor layer with a relatively short persistence, of which the decay time is not less than 10-3 sec., the spectral emission curve of the phosphor layer substantially matching the spectal sensitivity curve of the photo-conductive elements.  The photo-conductive element layer 17 is in contact with linear electrodes 16 of silver or a dried aqueous graphite suspension and with auxiliary electrodes 13 of aluminium or silver.  The material of the photo-conductive elements 17 can be granular cadmium sulphide or cadmium selenide in an insulating binder such as nitrocellulose and the phosphor layer of the screen 4 can be zinc phosphate activated with manganese in a potassium silicate binder.  Zinc sulphide-selenide activated with silver is also referred to in connection with the phosphor layer but is stated to be inefficient. The electroluminescent element layer 10 can be zinc sulphide activated with copper and aluminium in a binder such as urea formaldehyde.  A glass carrier plate 8, a tin oxide transparent electrode 9, an opaque reflecting layer 11 of white magnesium dioxide or titanium dioxide in a urea formaldehyde binder, a current diffusing layer 12 of conductive cadmium sulphide, and ribs 14 of powdered glass in an epoxy resin binder are also provided.
Patent GB-1037786-A (GB)
Title: Photoelectric resistor
Inventor: HANZLIK JIRI
Filed: 1965-06-25
Abstract: 1,037,786. Photoconductive devices. TESLA, NARODNI PODNIK. Jan. 25, 1965, No. 24311/62. Heading H1K. In a photoresistor consisting of a poly crystalline cadmium chalkogenide the individual monocrystals are covered with a continuous activator layer less than one micron thick and grouped together in grains which are preferably also covered with a continuous activator layer. In an example using cadmium sulphide the activator layer is of copper sulphide deposited from a colloidal suspension thereof or formed by reaction with a solution of copper sulphate.
Patent GB-626828-A (GB)
Title: Improvements in or relating to control systems for gas turbine engines
IPC: F02C6/02
Filed: 1947-09-03
Abstract: 626,828. Gas turbine plant for aeroplanes. BRISTOL AEROPLANE CO., Ltd., and MARCHANT, F. C. I. Sept. 3, 1947. No. 24356. Drawings to Specification. [Class. 110 (iii) ] A gas turbine plant for aircraft comprises two similar sets coupled through gearing to one variable pitch airscrew. Each set comprises a compressor and h.p. turbine on one shaft and a l.p. useful power turbine, on a second shaft. The fuel supply to both sets is regulated by a single manual control which may include two controls, one overriding the other. The division of power between the compressors and the airscrew is regulated by controlling the pitch of the airscrew. In an arrangement of four such plants in an aeroplane, the fuel supply to one set of one plant and the pitch of one airscrew are under direct manual control. All the other fuel supplies are automatically varied by electrical synchronizing mechanisms to keep the speeds of all the compressors the same and the pitches of the airscrews are similarly adjusted to keep the speeds of the useful power turbines the same.