baber/WOPTO huggingface dataset:
Patent GB-980995-A (GB)
Title: Process for manufacturing polypropylene films
IPC: B29D7/01
Filed: 1963-03-26
Abstract: 980,995. Manufacturing polypropylene films- SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. March 26, 1963 [March 28, 1962], No. 11913/63. Heading B5B. In the manufacture of polypropylene film by melt extrusion through a slot-shaped extrusion orifice on to at least one chill roll, there is mixed with the polymer before extrusion a minor proportion of a polyhydric alcohol containing in the molecule 2 or 3 hydroxyl groups or a partial ester thereof with a monocarboxylic aliphatic fatty acid having in the molecule more than 4 carbon atoms. Preferred additives are propane-1,2-diol and glyceryl monostearate. The addition of the additive to the polymer wholly or largely prevents the formation of undesirable deposits on the chill rolls (termed " plating-out ") which otherwise occurs to a greater extent according to whether the polymer contains larger proportions of other additives, particularly alkaline earth metal salts of higher fatty acids to overcome the corrosive effects of residual acid-reacting catalysts in the polymer.
Patent GB-844664-A (GB)
Title: Retractable-extendable writing instrument
IPC: B43K24/08
Filed: 1958-04-15
Abstract: 844,664. Writing instruments. FERBER CORPORATION. April 15, 1958, No. 11974/58. Class 146(3). A retractable writing instrument e.g. a ballpoint pen, operated by a press-button actuator, has detent means adapted alternatively to maintain the writing tip in its operative position or to permit it to return under the action of spring means to its retracted position, the detent means comprising alternate long and short helical grooves provided in a cylindrical surface of a part of the instrument and a resilient element engaging into one of the said grooves, whereby operation of the actuator causes relative axial and rotational movement between the resilient element and the grooves so that after each depression of the actuator against the action of the spring means the resilient element will engage into the next adjacent groove. The pressbutton actuator 19 is slidable and rotatable in the rear end of the barrel and has a cylindrical portion 38 having a short blind bore at its front end to receive the rear end of a ball-point writing unit 18. The cylindrical portion 38 is formed with alternate long and short helical grooves 41, 42, 41a, 42a (shown in developed condition in Fig. 9), one of which is engaged by a resilient tongue 35 forming a part of the pocket clip 30 and extending inside the barrel. The writing unit 18 is rearwardly biased by a spring 21 so that when the tongue 35 engages the lower end of a long groove 41 or 41a. i.e. position 2 or 6, Fig. 9, the writing point 25 is retracted within the barrel thereby. Depression of the actuator 19 causes the tongue 35 to ride out of the groove 41 or 41a and take up a position (3 or 7, Fig. 9), at the upper end of one of the short grooves. When pressure on the actuator is released it is carried back with the writing unit by the spring 21 until the tongue 35 abuts against the lower end of one of the short grooves, the actuator and writing unit being partially rotated by the camming action of the tongue 35 with the groove and the writing point 25 being then projected from the barrel. The point is retracted by a further depression of the plunger which causes the tongue 35 to re-enter one of the long grooves. To help the tongue 35 to ride out of the grooves the upper, inclined edge of each groove may be bevelled and vertical edges may be provided at the lower ends of the longer grooves. In a modification, two tongues similar to 35 are punched out of a sleeve inserted in the rear end of the barrel and engage diametrically opposed grooves in the cylindrical portion 38 of the actuator 19.
Patent GB-1254124-A (GB)
Title: Tenter apparatus and method for tentering open width fabric
Inventor: COHN EUGENE
IPC: D06C3/02
Filed: 1969-01-03
Abstract: 1,254,124. Tentering fabrics. SAMCOE HOLDING CORP. 3 Jan., 1969 [18 Jan., 1968], No. 11977/71. Divided out of 1,254,123. Heading D1S. In a method of tentering a fabric, the longitudinal edges of the fabric are engaged and advanced at a first speed and the intermediate portions of the fabric between the engaged edges are advanced at a second speed different from the first speed. The tentering apparatus forms part of a knitted fabric processing apparatus described in Specification 1,254,123. The fabric 27 passes around a pair of overfeed rollers 157 and between air jet edge uncurlers 158, 159 carried by edge-seeking tenter input sections 160, 161 forming the entry ends of guide channels 150, 151 for tenter chains 105. Edge sensing controls 162 each comprise a light source 163 and a pair of photocells 164, 165. If neither of the photocells is covered by the fabric edge, the respective section 160, 161 adjusts inwardly until the inside photocell 165 only is covered by the fabric edge. If both photocells 164, 165 are covered by the fabric the respective section 160, 161 adjusts outwardly until the photocell 164 is uncovered. Each uncurled fabric edge passes between a driven roll 166 and a pinch roll 167 which overfeed the fabric onto the chains 105. Driven brushes 168 having their bristles projecting slightly below the tips of tenter pins 108 impal the fabric edges upon these tips. Non-driven brushes 171 press the fabric downwards into fully pinned condition. The rollers 157 are driven at a preset but adjustable percentage of the tenter chain speed by a tach-follower control (not shown). Similarly, the rollers 166 and the brushes 168 are controlled by separately adjustable tachfollower controls related to the speed of the rollers 157. Tapes 198, 198a, Fig. 3, are provided to support the centre portions of the fabric. The tapes 198 pass around the upper roller 157 and an idler roller 199 and the tapes 198a are trained around idler rollers 199, 199a. Thus, both sets of tapes 198, 198a are driven at the "overfeeding" speed so that the centre portions of the fabric are advanced relative to the edges during at least the initial parts of the tentering operation to counteract distortion. (For Figures see next page)
Patent GB-1486712-A (GB)
Title: Vapour generating system and method
IPC: F22B31/00
Filed: 1975-03-21
Abstract: 1486712 Steam generation;. combustion apparatus; burning waste wood FOSTER WHEELER ENERGY CORP 21 March 1975 [22 March 1974] 12007/75 Headings F4A and F4B In a steam generation system a primary boiler 10 includes water tubes 16, headers 18 and a pipe line 26 in the fluid circuit, the steam generated in the primary boiler 10 being collected and separated in a collector drum 20, a secondary boiler 30 is provided with a fluidized bed 52 to burn particulate material and act as a feedwater heater or economizer to the primary boiler 10, the collector drum 20 being connected by additional water tubes 34 62 and line 64. Hot gases from the fluidized bed 52 pass upwardly through the secondary boiler 30 and outwardly into a duct 54 leading to the primary boiler 10. These hot gases combine with the hot gases produced by burning woodbark refuse fuel in the furnace of the primary boiler 10. Solid particles leaving the primary boiler are separated in a dust collector 82 and fed via connections 88, 90 to the fluidized bed 52 in the secondary boiler 30.
Patent GB-400623-A (GB)
Title: Improvements in or relating to circular knitting machines
IPC: D04B9/10
Filed: 1932-04-27
Abstract: 400,623. Knitting. BENTLEY, P. A., GODDARD, J. H., DEANS, F. E., MANGER, C. F., and WAINWRIGHT, C. H., Komet Works, New Bridge Street, Leicester. April 27, 1932, Nos. 12111 and 13217. [Class 74 (ii).] Articles knitted in string formation are rendered easily separable by knitting at least one course from a thread 202 which can easily be withdrawn from the loops of the knitted articles. The draw-thread 202 may be composed of hard cotton yarn and of colour contrasting with the knitted articles. Alternately a course may be knitted of separate lengths of thread of such a nature, the loops of each of such lengths being knitted with a different group of loops of the knitted article. In knitting stockings, the thread 202 is preferably knitted immediately preceding the welt of the next stocking. As described, the articles are knitted upon a superposed cylinder rib machine, and the thread 202 is knitted by the needles of one cylinder only. An additional feeder 16 spaced from the main feeder or feeders, a stitch cam 14, and trapping and cutting device 18 are provided for the thread 202, and are movable into and from operative position by pattern mechanism. The thread trapping and cutting device may be as described in Specification 337,058 [Class 74 (ii), Knitting &c.]. One layer of a French welt may be knitted at the additional feed point by the needles of one cylinder and the other layer knitted at the main feed point by the needles of the other cylinder. A few adjacent needles may be caused to knit I X rib work immediately before the welt is formed to look the end of the drawthread. Specifications 15008/00, [Class 74, Lace-making &c.], 24290/12, 171,483, 280,612, 321,210, and 331,901, [all in Class 74 (ii), Knitting &c.], and 380,092, also are referred to.
Patent GB-373739-A (GB)
Title: Improvements in grinding machines and like machine tools
IPC: B24B47/20
Filed: 1931-04-24
Abstract: 373,739. Feed-mechanism for grinding-machines. SAISSELIN, E. L. and TRIPET, A., (trading as SAISSELIN & TRIPET), 14, Rue du Faucon, Bienne, Switzerland). April 24, 1931, No. 12162. Convention date, May 17, 1930. [Class 60.] In an automatic feed for a grinding or like machine tool having hydraulically operated slides, the movements of a distributing valve controlling the slide cylinders are arranged to effect the automatic feed of the grinding-wheel. The grinding wheel 23 operates on work mounted on a compound slide 26<1> and is fed vertically by means of a screw 22 operated through bevel gearing from a shaft 1 carrying a hand-wheel 2 provided with a ratchet ring 3. A two-armed lever 4 is provided on the arm 5 with a wedge element 7 coacting with a notch in the end 17 of the main distributing valve stem 13. The valve establishes connections between the pressure line 16 and opposite sides of the operating piston of the transverse work slide and is itself controlled by a rotary distributer 20 operated by dogs on the transverse slide. At each movement of the valve 13 the notched part 17 causes the oscillating lever to be rocked and this movement is transmitted to the shaft 1 to feed the grinding-wheel by means of a pawl 8 mounted on the lever arm 6 and coacting with the ratchet ring 3. In some cases the pawl 8 may be automatically released when a predetermined thickness has been ground off the work. The longitudinal element of the compound slide operates simultaneously with the movement of the transverse slide.
Patent GB-438255-A (GB)
Title: Improvements in arrangements for resonance indication in superheterodyne receiving sets
IPC: H03J3/14
Filed: 1935-04-23
Abstract: 438,255. Wireless receiving-apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. April 23, 1935, No. 12222. Convention date, July 2, 1934. [Class 40 (v)] In a supersonic heterodyne receiver resonance with the incoming signal is indicated by the use of one or more lightly damped resonance circuits coupled to the intermediate frequency amplifier and connected to a valve in the direct current circuit of which a lamp or the like is provided. The Figure shows an arrangement in which the detector D gives automatic volume control and a valve V is fed from the intermediate frequency transformer II through a coupling coil L. In the anode circuit a lightly damped circuit S is provided associated with a rectifier AG and lamp R1.
Patent GB-238597-A (GB)
Title: Improvements in and relating to golf bags
IPC: A63B55/00
Filed: 1924-05-19
Abstract: 238,597. Lawrence, J. H. May 19, 1924. Bags for golf clubs.-A. golf-bag hood is provided with a substantially rigid mouth which is adjustable in size and is adapted to be secured to the usual metal ring at the opening of the bag. As shown in Figs. 2 and 4, the stiffened mouth b<1> of the hood b contains a flat chain b<2> or other flexible, inextensible member, the ends of which may be connected together by a pivoted hasp c<1> and turn-button c<5>, the latter having an eye to receive the bow of a padlock. The mouth of the bag x, Fig. 3, is stiffened by a reinforcement x<1> of fibre or metal covered with leather, and is provided with a metal ring a under which the member b<2> of the hood is adapted to fit. The hood is provided with a pocket b<3> and with a hook b<6> to hold it in position against the ring a. In modifications, the member b<2> may be formed as a hinged metal ring, or as a flexible ring provided with L-shaped slots adapted to be engaged by studs projecting from the ring a.
Patent GB-573966-A (GB)
Title: Cellular structures and methods of producing same
IPC: C08J9/30
Filed: 1943-07-27
Abstract: Sponge-like or cellular structures are produced by converting a partially hydrolysed polyvinyl ester into a polyvinyl acetal whilst the starting material is in the form of a foamed aqueous solution or dispersion.  The aqueous solution or dispersion is mixed with an aldehyde and strong mineral acid, the mixture foamed to a multiple of its bulk and then allowed to stand and set.  The mixture may be poured into moulds before setting and the setting may be accelerated by heat.  Plasticisers and fillers (e.g. glass, sisal, asbestos) may be incorporated before or after setting. Instead of aldehydes, substances liberating aldehydes, e.g. hexamethylene, tetramine and dihydropyran, may be used.  The foaming may be done by any known method, whisking and gas treatment being specified.  A foaming agent may be added.  In examples foaming and setting of the following mixtures are described: (1) solvar, paraformaldehyde and hydrochloric acid; (2) solvar, paraformaldehyde, saponin and sulphuric acid; (3) polyvinyl acetate, saponin, formaldehyde and sulphuric acid; (4) partially hydrolysed polyvinyl ester, paraformaldehyde, saponin, calcium carbonate and sulphuric acid; (5) solvar, paraformaldehyde, calcium carbonate and sulphuric acid.  Solvar is an aqueous solution of a partially hydrolysed polyvinyl ester. According to the Provisional Specification, polyvinyl alcohol instead of a partially hydrolysed polyvinyl ester may be used as a starting material.
Patent GB-636805-A (GB)
Title: Improvements relating to adjustable chairs
IPC: A47C7/38
Filed: 1948-05-04
Abstract: 636,805. Seats BRITISH OVERSEAS AIRWAYS CORPORATION, and LEVER, G. G. May 4, 1948, No. 12273. [Class 52 (ii)] A seat is provided with a head rest having side wings and carried by'rods &c. telescopically arranged in the seat back framework a cone lock mechanism being also provided operable by levers mounted in the side wings. As shown the head rest comprises a pivotal pillow-rest frame 19, and side wings having panels 16 carried by tubes 11 telescopically arranged in the tubes 9 of the back rest. Pivoted to the side wings at 23 are levers 22 to the end of which are pivoted rods 25 having a cone 27 at their ends. Balls 29 are arranged in slots 28 in the tubes 11 and movement of the cone vertically locks and unlocks the tubes 9, 11. Movement of the cone 27 is operable by finger grip of the occupant on the ends 37 of the levers 22 which are spring biased. The ends 37 are accessible through recesses 38 in the side wings.
Patent GB-444855-A (GB)
Title: Improvements in and relating to quick make and break electric switches
IPC: H01H23/16
Filed: 1935-04-24
Abstract: 444,855. Tumbler switches. SANDERS & CO. (WEDNESBURY), Ltd., Falcon Electrical Works, Wednesbury, and WAITE, R. T., Porthmeor, Bescott Road, Pleck, near Walsall. April 24, 1935, No. 12296. [Class 38 (v)] A tumbler switch has an operating member 10 formed with a curved part 9 which moves on the outer side of a curved bridge 7 and carries a U- shaped extension 13 which passes through a slot 8 in the bridge and is pivoted at 18 to depending ears 16 formed on the bridge. A movable contact member comprises a pair of arms 19 joined by a crosspiece 70 and pivoted at 18 to the ears 16. A tension spring 22 is connected between the upper end of the extension 13 and a pin 21 on the contact member. At each end of the curved part 9 of the operating member is a pair of ears 14 which are joined underneath the bridge by rollers 15 which are adapted to engage the contact arms 19 to give an initial positive actuation. In a modification the member 13 is dispensed with and the operating member is supported solely by the bridge.
Patent GB-351634-A (GB)
Title: Improvements in or relating to the storage and transport of acetylene, more particularly for use for the autogenous working of metals
IPC: C10L3/04
Filed: 1930-04-22
Abstract: To facilitate the storage and transport of acetylene, it is converted into the form of snow by any known means and compacted by pressure.
Patent GB-454083-A (GB)
Title: Improvements in and relating to electric circuit breakers
IPC: H01H33/985
Filed: 1936-05-04
Abstract: 454,083. Heavy - current switches. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. May 4, 1936, No. 12581. Convention date, May 4, 1935. [Class 38 (v)] Magnetic blow - outs.-a circuit-breaker comprises a pair of relatively-movable contacts enclosed within walls of pressure-resistant material forming a sealed compression chamber having a volume such that high gas pressures' are generated therein by the arc formed between the contacts, and means including a permanent magnet for producing a magnetic field substantially at right-angles to the path of movement of the operated contact adjacent the point of separation of the contacts. The use of the magnetic field renders the breaker suitable for D.C. working. Fig. 1 shows the invention applied to a breaker as described in Specification 420,042, in which a brass or other non-magnetic compression chamber 12 is housed in an enclosure 11 integral with the moulded-insulation base 10, and has insulating bushings 13, 14, in the former of which the fixed contact 15 is secured, while the movable contact 17 is slidable in 14 and sealing means co-operate with 14, 17 to seal the chamber 12 in a gas-tight manner. The permanent magnet 19, Fig. 4, is U-shaped and its poles pass through apertures 20 in the enclosure 11 and are curved in conformity with the curvature of the chamber 12 on which they abut, so providing a blow-out field at right-angles to the direction of movement of contact 17. The magnet comprises material of high coercive force, alloys as described, for example, in Specifications 423,897 and 424,746, [both in Group II], being suitable. The switch " movement " comprises a pin 34 serving as a pivot for an operating handle 33, for a member 39 having a pin 35 taking in a slot in contact 17, and for a trip member 43 carrying a latch part 42 normally held in the position shown by a bimetallic latch 41. By means of a pair of springs 31 anchored between the pins 32, 35, contact 17 can be moved on and off with a snap action by means of the handle 33. When the latch 41 flexes on overload and releases the latch part 42, a part (not shown), on the member 43 engages the cross-arm 40 uniting the two limbs of member 39 and forces the switch to the off position. The driving force is provided by a rod 44 engaging a notch in member 43 and having a compression spring 45 engaging at one end an enlargement on the rod 44 and at the other a stop 46 co-operating with parts 27 on the frame 26. The stop 46 also clamps between itself and the enclosure 11 a part 24 of the bracket 22, the part 23 of which lies over the yoke of the magnet 19 and holds it in place against the enclosure 11. A member 25, Fig. 4, insulates the magnet from the bracket 22 and switch " movement." The breaker is adapted for D.C. working by inserting the magnet and bracket and clamping the whole by mounting the frame 26 on the base 10. For A.C. working the bracket and magnet are omitted.
Patent GB-978266-A (GB)
Title: Improvements in or relating to feeding stuffs
IPC: A23K1/14
Filed: 1961-04-07
Abstract: Preparation of a feed supplement involves ensiling sea animal material or waste to convert it to liquid condition and absorbing the liquid in dried, ground sea plant material.  According to the example, 60 kg. of shark is liquefied by mixing with 3 kg. of sulphuric acid, and then 40 kg. of dried, finely ground seaweed is incorporated.  Specification 488,704 is referred to.
Patent GB-418804-A (GB)
Title: Improvements relating to grid control systems for electric discharge vessels
IPC: H02M7/15
Filed: 1934-04-27
Abstract: 418,804. Rectifying alternating current. SIEMENS-SCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. April 27, 1934, No. 12782. Convention date, Aug. 28, 1933. [Class 38 (ii).] In a grid-controlled rectifier 1, the potentials applied to the grids 7 for initiating discharge at the associated anodes are derived from the circuits of the exciter anodes 4. In the arrangement shown, the grid circuits, which include an auxiliary D.C. source 8, are coupled by transformers 6 with the secondary circuits of regulating transformers 5 feeding the exciter anodes. The grid circuits may, however, be conductively or capacitatively coupled to the exciter anode circuits.
Patent GB-182621-A (GB)
Title: An improved machine or apparatus for hauling, lifting and other analogous purposes
IPC: B66D1/02
Filed: 1921-05-04
Abstract: 182,621. Dewar, J. May 4, 1921. Ratchet gearing for driving winches comprises an operating-handle mounted above the drum and carrying a pair of alternately-acting gravityactuated pawls which are both disengaged automatically from the ratchet wheel when the operating-handle is moved into a position in which it applies a brake band. A particular construction of detent also is used. The operating-handle 22 carries a pair of alternately-acting hooked pawls 23, 24. The pin 26 forming the pivot of the pawl 24 is adapted to engage the hooked end 35<a> of a band brake lever to apply the brake when the handle is moved anticlockwise to a greater extent than usual. During this additional movement the stop 39 on the lever lifts the pawl 23 out of engagement, and the latter lifts the pawl 24 by engaging a pin thereon. A detent 32, carried by a counterweighted pedal, can be lowered against the action of a weight to permit braked gravity lowering and can be locked in this disengaged position by a pivoted gravity catch 41.