baber/WOPTO huggingface dataset:
Patent GB-1123823-A (GB)
Title: Blowing agents
Inventor: REED RONALD ARTHUR
IPC: C08J9/10
Filed: 1965-02-26
Abstract: A blowing agent composition comprises a major proportion of azodicarbonamide and a minor proportion of an alkarylsulphonhydrazide of the formula <FORM:1123823/C3/1> where R1 to R5 are selected from hydrogen, alkyl and hydroxy or chloro-substituted alkyl, at least one being alkyl or substituted alkyl. Specified sulphonhydrazides, whose effect is to lower the decomposition temperature of the azodicarbonamide, are p-toluene-, o-toluene-, p-ethylphenyl -, and 2,4 - dimethylphenyl-sulphonhydrazides, and specified substituted alkyl groups are hydroxymethyl, hydroxyethyl and chloroethyl. Preferably the sulphonhydrazides are used in amounts of 10 to 50% of the weight of azodicarbonamide.  Specified resins which may be expanded using this blowing agent are vinyl chloride, styrene, propylene, butadiene, chloroprene, and acrylonitrile polymers, and also rubbers and polyamides.  The blowing agents are preferably used in amounts of 1 to 15% by weight of the polymer, and decompose at 160 DEG  to 165 DEG  C.  Reference has been directed by the Comptroller to Specification 1,012,861.ALSO:A polymeric material, which is foamed using a blowing agent composition consisting of azodicarbonamide and an alkarylsulphonhydrazide, may be foamed by spreading a mixture of polymeric material and the blowing agent on a metal plate, a polyvinyl chloride sheet or a fabric backing, and heating either statically or on a moving belt passing through an oven.  Specified polymeric materials are polymers of vinyl chloride, styrene, butadiene, chloroprene, propylene, acrylonitrile, acrylates and methacrylates and polyamides, and natural or synthetic rubbers. Reference has been directed by the Comptroller to Specification 1,012,861.
Patent GB-1198002-A (GB)
Title: Improvements in or relating to the Clarification of Sugar Juice
IPC: C13B20/12
Filed: 1968-02-21
Abstract: 1,198,002. Sugar. TONGAAT SUGAR CO. Ltd. Feb. 21, 1968 [March 3, 1967], No. 8448/68. Heading C6B. In a process for purifying juice derived from sugar cane, a first portion of the juice is treated to precipitate contaminants, including most of the stock, the precipitate is separated and the resulting juice, mixed with another portion of the original juice and remaining contaminants precipitated and removed, the purified juice being used to manufacture raw cane sugar or refined white sugar in known manner. The first precipitation is preferably effected by adding lime or lime and NaOH to raise the pH to between 8À5 and 10À5, preferably 10, and heating to a temperature not exceeding 160‹ F., preferably 145 to 150‹ F. The precipitate is preferably separated by vacuumflotation. The second precipitation is preferably effected by adding a phosphate, rasing the pH to about 8 and heating to substanially abover 160‹ F., e.g. to boiling point. A flow chart and a mixing device are described for effecting automatic adjustment of pH level of the mixed juices by adjusting the relative rate of flow of the two portions of juice according to their individual pH levels.
Patent GB-753886-A (GB)
Title: Improvements in or relating to multi-channel high frequency communication systems
Inventor: LEWIN LEONARD
IPC: H04J1/12
Filed: 1954-03-25
Abstract: 753,886. Multiplex radio signalling. STANDARD TELEPHONES & CABLES, Ltd. March 25, 1954, No. 8698/54. Class 40 (5). A first set of individual channel devices 1, 2, 3, Fig. 3, utilizing respective non-overlapping frequency bands A, B, C are connected to a first multi-channel transmission guiding medium such as the aerial 10a by the same coupling means 4, 5, 6 as is used to connect a second similar set 28, 29, 30, using the same respective bands A<SP>1</SP>, B<SP>1</SP>, C<SP>1</SP>, to a second medium such as the aerial 27a. The coupling means comprises three band rejection filter units 4, 5, 6, which reject the respective bands A, B, C connected in series between the aerials 10a, 27a, the corresponding channel devices of the two sets being connected to opposite ends of the filter for the frequency band utilizer thereby. The channel devices may be all transmitters or all receivers. or one set may be transmitters and the other receivers. The rejection filter units, such as 4, may comprise a hybrid network 18, Fig. 2, the main output of which is connected to the aerial feeder 10 while the other main arm is connected to line 7 of channel device 1. A second hybrid network 19 has its main arms connected respectively to line 15 of channel unit 28 and line 20 leading to the next filter unit 5. Between the two pairs of corresponding side arms of the hybrid networks 18, 19 are connected band-rejection filters 23, 26, the total phase shift in each arm at the mean wavelength being the same, but quarter wavelength phase displacements being provided between the two inputs and the two outputs of the filters. Specification 734,545 is referred to.
Patent GB-634063-A (GB)
Title: Improvements in or relating to slicing machines
IPC: B26D1/153
Filed: 1948-03-25
Abstract: 634,063. Slicing-machines. ASCO, Ltd., and SHARPLEY, W. March 25, 1948, No. 8732. [Class 28(ii)] A gravity feed machine of the type having a reciprocating table running on guide rails c which are protected by a casing a, is provided with a door pivoted at the lowermost edge g<SP>2</SP> in which is formed a tool box g<SP>1</SP>.
Patent GB-1141364-A (GB)
Title: Forming paving or strip or beam-like articles in concrete
Inventor: MORGAN JOHN GUY DAVID
IPC: E01C19/48
Filed: 1965-03-02
Abstract: 1,141,364. Concrete laying machines. BLAW KNOX Ltd. 1 March, 1966 [2 March, 1965; 12 Aug., 1965], Nos. 8969/65 and 34580/65. Heading E1G. In order to produce uniform compaction and to eliminate the need for striking-off when laying concrete in strips or slabs, the concrete is passed through an adjustably curved passage under substantially irrotational flow conditions, the consequential relative movements of the concrete particles as they negotiate the curve eliminating any voids. The apparatus shown is drawn over a base 2 by a winch 33 and comprises a hopper and a curved passage 14 defined by a vertical or inclined forward plate 4, side plates 7 and an adjustably curved top member 15 of substantially hyperbolic streamline form. The member 15 is formed by end sections 16.17 resiliently connected to a central section 18 and is adjusted by a screw 27 supported from the plates 7 by a bracket 23, the screw acting on a bar 24 attached to the sections 16, 17. Vibrators such as 30, 31 follow the streamlines in the flow and a further vibrator 20 acts one the section 18. A rear extension top plate for the passage 14 may be provided, and the apparatus may have wheels for self-propulsion.
Patent GB-308274-A (GB)
Title: Improvements relating to automatic controlling apparatus for regulating the drags oncontinuously acting spinning machines
IPC: B65H54/14
Filed: 1929-03-20
Abstract: 308,274. Touron, A. Nau-. March 20, 1928, [Convention date]. Addition to 259,932. Spindle apparatus.--In order that the mechanism described in the parent Specification for automatically varying the angle of contact of the drag bands may be applied to the spinning of cops, the internally toothed wheel 39<a>, which in the mechanism described in the parent Specification is fixed, is suitably rotated to modify the motion of the pin 37 of the planet wheel 36. Additionally, the pin 30 on the disc 32, which is rotated by the pin 37 on the planet wheel, may be connected to the bar 1 which carries the drag cords through any suitable kinematic system, for example an adjustable lever a, Fig. 3, or the pin 37 may be utilized to operate the bar 1 directly through a similar system, as shown in Fig. 4.
Patent GB-945479-A (GB)
Title: Stabilized polyurethanes
IPC: C08J9/00
Filed: 1960-03-15
Abstract: A polyurethane or polyester urethane or mixed polyether-polyester urethane incorporating as a stabilizer from 0.05 to 7.5% by weight of the polyurethane forming reactants of at least one organic phosphite of the general formula: <FORM:0945479/C3/1> wherein R1, R2 and R3 are alkyl cycloalkyl, aralkyl, aryl or alkaryl radicals, at least one of R1, R2 and R3 containing at least one fluorine or chlorine substituent are made by incorporating the phosphite in the polyurethane-forming reaction mixture.  Many fluorine and chlorine substituted organic phosphites are specified, examples being tri(difluoro chloromethyl) phosphite, tri (2-chloroethyl) phosphite, tri (fluorophenyl ethyl) phosphite, tri (2-chloroanthracyl-5) phosphite and monochloro phenyl dibutyl phosphite.  Many polyisocyanates, polyesters, polyethers and optionally cross-linking agents for use in the preparation of the polyurethanes are specified. Catalysts e.g. tertiary amines, organic cobalt, lead and nickel naphthenates, stearates and linoleates and organic stannous and stannic compounds may be used. Other additives e.g. siloxane-oxyalkylene block copolymers, silanes, siloxanes, emulsifiers, carbon black, titanium dioxide, wood flour, metal flakes, natural and synthetic fibres, pigments, dyes, rubber and resins may be present in the reaction mixture. Water alone or in admixture with lithium aluminium hydride is the preferred blowing agent for the production of foams, other blowing agents specified are liquid fluoro- and chloro-fluoro-alkanes and liquefied methane and ethane.  In the examples, foamed polyurethanes are made from:  (I) an ethylene oxide capped adduct of propylene oxide and glycerol, a silicone block copolymer, water, tolylene diisocyanate, dibutyl tin dilaurate and a chloroalkyl and/or chloroaryl phosphite and (II) a propylene oxide adduct of glycerol, dibutyl tin dilaurate, water and tolylene diisocyanate.
Patent GB-259479-A (GB)
Title: Improvements in or relating to screwing chucks having turnable dies
IPC: B23G5/12
Filed: 1926-04-07
Abstract: 259,479. Kaiser, G. A. R. April 7, 1926. Screwing dies and die-heads. - In a pivoted carrier die-head, the dies 3 are mounted on carriers 8 having integral pivots 5<a> and integral levers 5 which carry pivoted blocks 5b engaging slots 3a in a rotatable ring 2. The pivots 5a are accommodated partly in a central core 6 of the head and partly in a ring 7 which is inserted when the die-carriers have been rotated to their outermost positions. The dies, which consist of sectors of an annular disc, are cut from a single tapped ring of metal and are mounted eccentrically so that the cutting edges do not require backing-off and act with a draw-cut. A handle 1 provides for rotating the ring 2.
Patent GB-953255-A (GB)
Title: Continuously variable speed change gearing
IPC: F16H15/04
Filed: 1962-03-09
Abstract: 953,255. Variable-speed gear; toothed and friction gearing. H. BROZIAT. March 9, 1962 [March 21, 1961], No. 9275/62. Headings F2D and F2Q. A continuously variable-speed gear comprises a driven wheel 21 having a rim, such as 22, rotatable about an axis disposed peripherally of said wheel, and a co-operating driving wheel 16 angularly movable continuously from a working position in which it acts wholly or partly in the peripheral direction of said wheel into a neutral position, shown, in which it acts at right angles to said peripheral direction. The driving wheel may engage the inner periphery of the driven wheel rim (Figs. 5, 6, not shown), providing a non-reversing drive, or the side faces, in bevel gear manner, or, as shown, the outer periphery, providing forward and reverse drive. As shown, the wheel rim 22 comprises ballbearings the inner races of which are retained on spigots of lamellµ 23 clamped in grooves 24 of parallel driven wheel rings or discs 25. The driving wheel is driven by an electric motor shaft 10 through bevel gears 9, 17, and is carried by bearings 14 in a sleeve 3 for rotation, by a handle 6, through 360 degrees. The driving wheel 16 is cylindrical, may be wholly of elastic material or have an elastic surface, or may have a covering of copper or light metal alloy. In Figs. 5, 6 (not shown), the driving wheel having a spherical engagement surface engages the inner periphery of the driven wheel, which periphery provides a substantially closed engagement surface, is driven through bevel gearing, and is supported on a driving motor arm for pivotal movement therewith through approximately 100 degrees. In Fig. 7 (not shown), to provide a continuously closed engagement surface for the driven wheel rim the latter comprises a rotatable elastic torus in rolling engagement with two supporting parallel, spaced ball-beating rims 22. The torus may comprise a closed helical spring coated with plastics material or rubber.
Patent GB-116930-A (GB)
Title: Improvements in or relating to Diaphragm Horns.
IPC: G10K9/10
Filed: 1917-06-28
Abstract: 116,930. Klaxon Co., Monnot, J. F., and Cook, E. T. June 28, 1917. Diaphragm horns.-In a diaphragm horn, the rotor e is so disposed that its axis may be moved parallel to itself towards or from an imaginary line passing at right-angles to the diaphragm through the anvil d whereby a variation in the volume of sound produced is obtained. In the construction shown, the rotor is carried by the frame g enclosing the gearing for operating it by means of a push-knob h. The frame is attached to the casing b by screws m and adjusted parallel to the diaphragm c by the differential screws j, k.
Patent GB-107639-A (GB)
Title: Can Seaming Machine.
Inventor: BURPEE FRANK WATTS
IPC: B21D51/32
Filed: 1916-07-04
Abstract: 107,639. Burpee, F. W. July 4, 1916. Seaming. -In a can-seaming machine which can be clamped to a bench &c. the can is clamped and rotated and the seaming-rollers are operated by hand. The lower chuck 6 is resilient and is moved up by inclined teeth 9 on the lever 8 engaging fixed teeth 4. The upper chuck has a milled edge to grip the can lid and is rotated by bevel-gears 16 and lever 17. The roughing, and finishing seaming-rollers 23 are mounted on eccentric pins for adjustment in the lever 21 as shown in Fig. 5.
Patent GB-1465311-A (GB)
Title: Separating and classifying means
IPC: B04B1/14
Filed: 1974-03-01
Abstract: 1465311 Centrifugal separator CLASICON (PTY) Ltd 1 March 1974 [20 March 1973] 9421/74 Heading B2P  An apparatus for separating the constituents of a fluid mixture comprises a rotatable tubular container 12 having an inlet opening at one axial end 14 and an outlet opening at the other axial end 40; a radially outwardly extending settling compartment 18 fast with the tubular side wall 16 of the container about an entrance aperture 48 provided in the wall, the compartment converging from its radially inner entrance end to a closable discharge orifice 31 at its radially outer end, and the radial depth of the compartment being greater than the axial width of its entrance aperture; a valve 32 for closing the orifice; feed means 15 for feeding the mixture into the container through its inlet opening; and flow means for causing the mixture to flow along the tubular side wall of the container towards its outlet end and towards and past the entrance to the compartment. The constituents of the fluid mixture may be solid, liquid or gaseous so that the mixture may for example, be a gas-liquid, liquid-solid, gas-solid or liquid-liquid mixture.  The container 12 is frusto-conical and is connected by means of radial arms 28 to a shaft 20 which is belt-driven by a motor 26. A plurality of compartments 18 are provided at different elevations in axially spaced banks 30. In use a mixture e.g. of sand and water, is provided in a reservoir 15 and fed to the inlet of the container. Due to the frusto-conical shape of the container and to the presence of radially extending fins 29 fast with the shaft 20 and the container wall 16, upon rotation of the container centrifugal force is imparted to the feed mixture and it is displaced upwardly past the entrances of the compartments 18 in the direction of arrows 38. Heavier or larger sized fractions of the sand settle into the lower compartments and lighter or smaller fractions in the upper compartments, while substantially sand-free water overflows at 40. When a compartment is full a sensor 33 opens its respective valve 32 and sand is discharged into a stationary outer casing 34 and directed by baffle plates 36 to collecting means (not shown). Alternatively the valves may be opened by a timer. An internal wall 50 may be provided, as shown in dotted lines, to restrict the radial thickness of mixture flowing along the wall 16 of the container.
Patent GB-440397-A (GB)
Title: Improvements in optical systems
IPC: G02B21/02
Filed: 1934-03-26
Abstract: 440,397. Lenses. CHRETIEN, H., 4, Rue Pigache, Saint Cloud, Seine-et-Oise, France. March 26, 1934, No. 9439. Void [Abridged as open to inspection under Sect. 91 of the Acts, Sept. 26, 1934]. [Class 97 (i)] A lens system for photography or projection comprises a divergent component D and two convergent components C, C<1>, each component being corrected as regards spherical and chromatic aberrations for an object at infinity and the component D being on the longer conjugate side of the system. The system is particularly intended as an objective of which the focal length can be varied by displacing the components C, C<1> relatively to the component D and to each other, the displacements being so related that the image plane remains fixed for a given position of the object. The focal length of the component D is numerically equal to the mean of the maximum and minimum values of the focal length of the system. The components C, C<1> are preferably'identical and have a focal length which is numerically greater than that of the component D. Constructional data are given.
Patent GB-582051-A (GB)
Title: Improvements in or relating to combined pressure-reducing and relief valves
IPC: G05D16/06
Filed: 1944-05-18
Abstract: 582,051. Fluid - actuated valves. WOODHOUSE & MITCHELL, Ltd., and FORBES, L. May 18, 1944, No. 9527. [Class 135] A combined pressure-reducing and relief valve comprises an open-ended casing a with an opening a<2> connected to a reduced pressure conduit and an opening a<1> in which is secured an inlet member e connected to a high-pressure conduit, the bore e<1> of the inlet member terminating in a passage e<2> at right angles thereto and coincident with the axis of the casing, a flexible diaphragm b clamped between the casing a and a housing c containing an adjustable spring h, and a hollow cylindrical member g secured in an opening in the diaphragm by a hollow spigot g<1> and containing a longitudinally slidable member n formed with a relief valve n<1> at one end and a pressure-reducing valve n<2> at the other end. , A cap d closes the lower end of the casing a. The inlet member e is inserted through slots n<3>, g<3> in the members n, g respectively. The valve n<2> is pressed upwardly to engage a seat e<3> by a spring p engaging a screwed ring r. The relief valve n<1> has a seat g<2> at the inner end of the passage in the cylindrical member. Vent openings c<2> are provided in the casing c which is closed at its upper end by a knob m which rotates a screw m<1> which adjusts a nut j prevented from rotating by a pin j<1> in a keyway c<1>.
Patent GB-369410-A (GB)
Title: Improvements in or relating to flyers for spinning and twisting machines
IPC: D01H7/24
Filed: 1931-03-30
Abstract: 369,410. Yarn guards for flyers. LOW & CO., Ltd., J. F. and HARGROVE, J., Monifieth Foundry, Monifieth, Angus. March 30, 1931, No. 9540. [Class 120 (ii).] A flyer is provided with a guard 3 in the form of a disc of a diameter approximately equal to the width over the legs 4, fitted to the upstanding boss 1 close to the shoulder, to prevent the yarn from winding around the top of the flyer and becoming jammed against the spindle rail. Specification 279,324, [Class 120 (ii), Spinning, twisting &c.], is referred to.
Patent GB-1341148-A (GB)
Title: Telephone handset and support therefor
IPC: H04M1/03
Filed: 1972-03-01
Abstract: 1341148 Sets ROBERT BOSCH ELEKTRONIK GmbH 1 March 1972 [9 July 1971] 9609/72 Heading H4J  A handset 1 (Figs. 1, 3) having a web 2 joining a receiver 4 and microphone 6 has a handle 7 with an elongate opening 8 for insertion of four fingers of a user's hand. The headset may be used in a motor vehicle, the user's fingers being free to operate a dashboard switch or gear lever or to turn a steering wheel. The portion of the handle 7 in use gripped by the front of the hand is resilient and has a longitudinal recess (16) see Figs. 4, 5 (not shown) which adapts to the curvature of the steering wheel. The back of the handle is interrupted for flexibility and so that it is not inconvenient to wear a ring on one of the inserted fingers. The opening 8 is rounded, and is shaped at its ends so that the handset lies snugly in the hands even with fingers outstretched. The handset is made in a single moulding from foamed polyurethane and its surface is free from cells. A handset support 19 (Fig. 7) is approximately rectangular. It grips the handset and narrows towards its lower end, which is open to prevent accumulation of dirt. A single, or as shown, double cradle switch 22, 23 is actuated by the portion of the handset adjacent the receiver 4. The rest 19 is of foamed plastics material.
Patent GB-628546-A (GB)
Title: Improvements in or relating to control systems for prime movers
IPC: H02P5/52
Filed: 1946-03-28
Abstract: 628,546. Automatic control systems for frequency. STEVENS, A. H. (Curtiss-Wright Corporation). March 28, 1946, No. 9623. [Class 38 (iv)] A signal frequency is mainequal to a standard frequency by deriving the beat oscillation and using the form of the beat oscillation to control the signal frequency. The invention is described with reference to an airscrew whose shaft drives a generator to produce the signal frequency, the propeller being feathered to vary the signal frequency. The propeller shaft 13 drives a signal frequency generator 49 whose oscillations are amplified at 66 and applied to the anode of valve 77 over transformer 76. Oscillations of standard frequency are generated at 69, amplified at 72 and applied to the grid and anode of valve 77. As a result, the anode voltage varies with the beat frequency while the grid voltage varies only at the standard frequency and a waveform 83b, Fig. 3a, or 83b, Fig. 3b, is developed according to whether the standard frequency is greater or less than the frequency from generator 49. This wave-form is differentiated at 86, 87 to provide positive or negative pulses a, b, Fig. 4, which are applied to gas-filled tubes 93, 97, so that one or other conducts to actuate either relay 103 or 104 appropriately closing contact 105 to actuate relay 124 or 125 to close contacts 41, or 38 to complete the circuit of one of the field coils of motor 19 which adjusts the feathering of the propeller to vary the load on the shaft 13 and thus its speed of rotation and the frequency of generator 49. Each tube, e.g. 93 when conducting causes a surge of current through resistances 107, 109 which with the discharge of condenser 112 renders the tube non-conducting, but the relay 103 remains energized for a time due to the discharge of condenser 113. Thus, each pulse of differentiation closes the motor circuit for a predetermined time dependent only upon the circuit constants of tubes 93, 97 to produce an increment of feathering. A further propeller may be synchronized to the speed in the same way.