baber/WOPTO huggingface dataset:
Patent GB-362401-A (GB)
Title: Improvements in the treatment of cellulose derivatives
IPC: C08B3/22
Filed: 1930-05-26
Abstract: In the manufacture of organic esters of cellulose, the solvent acid is separated, at least in part, from the esterification solution by evaporation.  The cellulose may be pretreated with lower aliphatic acids or with alkali as in Specification 249,173, [Class 2 (ii), Cellulose &c.].  Esterification may be effected with the aid of acetic, propionic or butyric anhydrides, or formic acid, with the aid of catalysts such as sulphuric acid, zinc chloride, sodium bisulphate or methyl sulphate.  As diluent or solvent, acetic, propionic or butyric acids may be employed.  The recovery of the acid may be effected after ripening treatment, e.g. to acetone solubility in the case of cellulose acetate, and after neutralization of acidic catalysts.  The evaporation is preferably under reduced pressure and may be assisted by injecting air or other inert gas into the solution.  The whole of the acid may be recovered by evaporation but preferably evaporation is stopped before the ester goes out of solution.  In an example, 100 parts cotton linters, pretreated or not, is esterified with 400 parts acetic anhydride, 600 parts glacial acetic acid and 10-30 parts sulphuric acid.  After esterification 50 parts water is added and the mixture is allowed to stand until acetone solubility is attained.  Sufficient sodium acetate or bicarbonate is then added to neutralize the sulphuric acid and the mixture is subjected to distillation under reduced pressure, with stirring, until 80 parts of acetic acid remain after which the mass is thoroughly mixed with water and the cellulose acetate removed and purified.  In a further example, the distillation is stopped when the acetic acid remaining in the mixture corresponds with the amount of acetic anhydride required for the next batch of cellulose, e.g. 470 parts; the cellulose acetate is precipitated and the dilute acetic acid is neutralized, e.g. with sodium carbonate, and the solution evaporated to dryness, the anhydrous sodium acetate being converted to acetic anhydride in any suitable manner.
Patent GB-331338-A (GB)
Title: Improvements in machines for making moulded pulp articles
IPC: D21J3/00
Filed: 1929-05-27
Abstract: 331,338. Pickett, J. H. May 27, 1929. Moulding pulp.-A machine for moulding pulp articles, e.f. egg containers, comprises a pulp vat 2, Fig. 9, into which is lowered a female suction mould 15. After deposition of the pulp, the mould 15 is raised into contact with a male member 33 which takes the article from the mould and subsequently delivers it to a reciprocatory carrier 66, Figs. 1 and 3, furnished with fingers 67 adapted to position the article in the path of fingers 170 of an endless conveyer 153 traversing a drying chamber. The mould 15, Fig. 9, is carried by a hollow rod 10 reciprocated by grooved cams on a main shaft 91. Suction is applied to the mould through a hole in the rod 10 connected by fexible tubing 12 to a casing 121 connected to a vacuum pipe 126 through a main valve 122 and bye-pass valve 124; the valve 122 is actuated bv cams 133, 133<a> on the shaft 91 engaging a bell-crank lever 129 and the valve 124 through a lever 138 and forked member 134 bv cams 136, 136a. Below the valve 122 is a valve 127 actuated from the shaft 91 through a cam 144 and levers 141, 146 to admit atmospheric air as the mould rises from the vat. The male member 33, Figs. 9 and 19, comprises a casing 32 connected by a flexible tube 110 to a valve casing furnished with vacuum and atmospheric valves 116, 117 actuated through cam-operated levers 112, 118. The casing 32 is secured to a member 43 loosely hung on bolts 48 from a sleeve 29 passing through a member 27 secured to a framing 25 and terminating in a grooved member 30 adapted to be engaged by a lever 54, Fig. 1. actuated by a cam 58 on a shaft 59. A spring 47, Fig. 19, acting as a sleeve 42 depresses the member 43 but permits yielding engagement of the member 33 with the mould. The article is detached from the member 33 by the projection of pins 38 through holes 39; the pins are secured to a, frame 37 carried by a central rod 40 connected at its upper end to a cam-operated lever 51, Fig. 1, which is momentarily depressed against the action of a spring 173. The frame 66 is reciprocated upon rollers 71 by a lever 80 actuated through a rod 89 and cam on the shaft 91. Below the frame 66 is a second frame 72 carrying a water spray to clean the mould prior to immersion. The frame 72 is reciprocated by a lever 82 actuated by a cam and rod 93 which is also connected to a lever 103 adapted to control the water valve 101 through levers 102. The carrier 153 is formed of linked brackets 166, Fig. 16, carrying rods 167 secured by bolts 169 and plates 168, the rods 167 carrying the fingers 170 which assume the positions shown in Fig. 3 to economize space in the drier. Motion is imparted to the carrier from the shaft 91 through bevel gears 98, 99, shaft 100, worm gear 161 and sprocket 164. The shaft 91 drives the cam shaft 59, Fig. 1, through a shaft 106 and bevel gear 104, 105. 107, 108.
Patent GB-128677-A (GB)
Title: Improvements in or connected with Rotary Blowers, Pumps, Engines, and the like.
Inventor: MILNER HARRY LAWLEY
IPC: F02B53/00
Filed: 1917-11-07
Abstract: 128,677. Milner, H. L., and Beeby, A. R. Nov. 7, 1917. Fixed-abutment type; driving pumps, blowers, and exhausters; packing drums, vanes, abutments, and the like.-In a rotary engine &c. having eccentric drums 4, 5, each of the power vanes comprises a rigid portion 15 and a resilient portion 16 (shown as a leaf spring) spaced from the portion 15 and adapted to bear continuously against the edge of the slot 7, which is fitted with renewable wearing surfaces 21. The vanes are carried by brackets 23 having flanges 24 guided between collars 25 carried by the outer races of ball bearings 22 on the cranked shaft 11. This shaft is hollow and has ducts 33 leading to the hearings to supply lubricant from the pipe 31. The rotor 4 is driven from a countershaft geared to the sprocket 13a secured to one of the end bosses 13 of the rotor. The inlet and outlet openings 29, 30 may be formed as described in Specification 106,521.
Patent GB-900237-A (GB)
Title: Elevator control system
Inventor: LUSTI JOHN
IPC: B66B1/18
Filed: 1960-05-09
Abstract: 900,237. Lift control systems. OTIS ELEVATOR CO. May 9, 1960, No. 16267/60. Drawings to Specification. Class 78 (3). A lift control system for three or more cars serving a plurality of landings, provides for the dispatch of an unselected car at the lower dispatching floor to answer landing down calls ahead of descending cars, in the event of the number of such calls being in excess of a predetermined number. The unselected car may be dispatched to answer either the lowest landing down call, or a down call from a landing above a predetermined number of unanswered landing down calls. In an alternative arrangement the unselected car is dispatched to answer the highest landing down call in a " low zone," providing at least one unanswered landing down call exists above the " zone," and another exists within the " zone." The car dispatched to answer the calls in any of the above arrangements by-passes all up landing calls. The Specification describes in detail a control circuit for a three car system, operating without attendants, which is a modification of the system disclosed in Specification 721,988.
Patent GB-162963-A (GB)
Abstract: 162,963. Kn³sli, E. June 25, 1920. Addition to 121,004. Valve-discharge water. waste preventers.-In the apparatus described in the parent Specification means are provided for controlling the closing motion of the inlet valve such that the controlling force diminishes as the valve rises and the pressure in the tank falls The tank 1 with water-inlet 3 and outlet 2 and the differential-piston valve 5 with recesses 13 for ad mitting water to the tank and recesses 6 for discharg ing it to the flush are identical with those des scribed in the parent Speci fication. On the head 14 of the valve rod bears one arm 15 of a weighted leve carried on an adjustable bracket 17. As the valv rises the weighted arm ap proaches the vertical, whic' it may finally pass, thu releasing the pressure of the lever on the valve as the tank empties and the pressure in it falls. The apparatus can be adjusted to different pressures of water supply by altering the height of its bracket 17.
Patent GB-476585-A (GB)
Title: Improvements relating to retardation controllers for fluid pressure braking apparatus for railway and like vehicles
IPC: B60T8/34
Filed: 1936-06-11
Abstract: 476,585. Fluid - pressure brakes. KERSHAW, A. G., SIMMONS, A. W., and WESTINGHOUSE BRAKE & SIGNAL CO., Ltd. June 11, 1936, No. 16343. [Class 103 (i)] In braking-apparatus for railway and like trains comprising a retardation controller on each vehicle, the braking on each vehicle is rendered substantially the same without the necessity of initial adjustment of the controllers to suit the characteristics (e.g. stroke of brake-actuating piston) of the braking apparatus on each vehicle. To achieve this result, the action of each controller is modified by the instantaneous air-pressure in the brakecylinder. As shown, the air from a supplementary reservoir or from the train pipe enters the controller at 8, passes a valve 7, and is supplied by a pipe 9 to the brake-cylinder. The space 2 is thus filled with air at brakecylinder pressure, which presses a piston 12 to the left against a spring 13. The self-lapping valve 11 follows the piston and tends to close the valve 7 through the rocking link 5. The brake-cylinder pressure in the early stages of the process will be different for different vehicles and thus (assuming the controller to be made from standard parts) the valves 7 will be at different distances from their seats. At a certain retardation of the train as a whole the pendulum 1 in each controller swings away from its stop against the action of the spring 3 and moves the point 4 on the lever 5. The valve 11 remains in the lapping position and the valve 7 is therefore brought down on its seat. Any further increase in retardation causes the valve 11 to open and relieve the pressure in the brake-cylinder. This relieving action occurs at different values of the retardation in different vehicles according to the initial setting of the valve 7 determined by the brake-cylinder pressure. This is made possible by the long travel of the valve. Ultimately all the brake-cylinders are exhausted slightly in unison as the train comes to a standstill and the brakes " bite " into the wheels. A retaining valve 15 may be provided to prevent the pressure from falling below a given value.
Patent GB-1254280-A (GB)
Title: Cementitious compositions
Inventor: FRENCH ERIC LIONEL
IPC: C04B26/10
Filed: 1968-04-04
Abstract: 1,254,280. Synthetic resin concrete. TAYLOR WOODROW CONSTRUCTION Ltd. 4 July, 1969 [4 April, 1968], No. 16349/68. Headings C3B, C3P and C3R. [Also in Division Cl ] A concrete contains an aggregate, at least 30% being a high alumina cement clinker, and an epoxy, polyurethane or unsaturated polyester resin, trade examples being given.
Patent GB-334213-A (GB)
Title: Improvements in apparatus for feeding molten glass to machines for moulding same
IPC: C03B7/00
Filed: 1929-05-29
Abstract: 334,213. Lax & Shaw, Ltd., Branford, J. E., and Shaw, J. F. May 29, 1929. Delivering molten metal. - Relates to a feeder of the plunger type in which a tubular member surrounds the plunger to control the weight of the charges of glass discharged by the plunger. According to the invention, the tubular member d, Fig. 1, is formed with inner and outer walls d<1>, d<2> respectively, which are joined at their bases, leaving a space d<4> between the walls into which the flames of the burners for maintaining the temperature of the glass around the plunger are projected. The glass is thus heated by radiation from the hot walls d<1>, d<2> and contamination of the glass by the heating-flames is presented. The feeding device is arranged, as usual, at the front end of a forehearth a which receives molten glass from a tank furnace b. The glass flows to the plunger through a central channel which can be closed by a plunger or gate f the position of which can be adjusted to regulate the flow. The outer wall d<2> of the member d may extend around the front half only, and in this case, the glass flows to the front of the forehearth through two channels along its sides, each channel being provided with an adjustable gate. The supports of the member d are mounted on a screw in order that the height of the member above the floor of the forehearth may be adjusted. The screw also enables the member to be raised out of the forehearth and swung to one side when replacement or repair is necessary.
Patent GB-137247-A (GB)
Title: Process of producing chlorination products of propylene
IPC: C07C17/02
Filed: 1919-07-02
Abstract: Propylene dichloride, mixed or not with higher chlorinated propylenes, is obtained by reacting with propylene upon liquid chlorine; the propylene may be used in gas or liquid form.  If liquid chlorine is added to an excess of liquid propylene, the product is pure propylene dichloride; if, however, liquid propylene is added to an excess of liquid chlorine, the product is propylene dichloride mixed with trichlorpropylene &c.  The reagents may be initially diluted with propylene dichloride or with an inert solvent such as carbon tetrachloride.  Specification 136,489 is referred to.
Patent GB-1068921-A (GB)
Title: Merocyanines and undissociated cyanine dyes
IPC: C09B23/10
Filed: 1964-04-22
Abstract: The invention relates to merocyanine and undissociated trinuclear dyes of the formulae <FORM:1068921/C4-C5/1> and <FORM:1068921/C4-C5/2> wherein R is an alkyl or substituted alkyl group, R1 and R2 represent hydrogen, alkyl or cycloalkyl of 1-8 C or phenyl or alkyl substituted phenyl whose alkyl substituents contain 1 to 8 C; Z and Z1 represent the non-metallic atoms necessary to complete a heterocyclic nucleus containing 5 or 6 atoms in the heterocyclic ring, n represents 0 or 1, p and p1 represent 0, 1 or 2, m represents 0 or 1, d represents 0, 1 or 2 and R3 is the same as R. Specified substituents on the alkyl groups R and R5 are hydroxy, alkoxy, vinyl, carboxy, phenyl, acetoxy, alkoxycarbonyl and sulpho groups.  In the examples, Z and Z1 complete benzoxazole, benzothiazole, 3,3 - dimethyl - indolenine, naphthothiazole, thiazoline and 2-quinoline nuclei and R1 and R2 are hydrogen.  The dyes are prepared from intermediates of the formula <FORM:1068921/C4-C5/3> by the usual methods.
Patent GB-1356591-A (GB)
Title: Coating of semiconductor crystals
IPC: H01L21/225
Filed: 1971-05-24
Abstract: 1356591 Coating from the gas phase; coating with glass SIEMENS AG 24 May 1971 [26 May 1970] 16655/71 Headings C1A and C1M [Also in Divisions C7 and H1] A method of depositing material by reaction of two gaseous components on a semi-conductor crystal to serve as a mask, passivation, electrode or diffusion source comprises exposing the heated crystal in a reaction chamber containing a first of said components and supplying the second component to the chamber, immediately adjacent the crystal surface, so that the concentration of said second component in the body of the chamber is sufficiently low to avoid deposit of the material except on the crystal. The method may be used for depositing oxides, nitrides, sulphides and pure metals on silicon, germanium or A III B V  compounds. Preferably the second gaseous component comprises from 0À1 to 0À5% by volume of the gas in the chamber. Details are given of processes for depositing arsenic trisulphide by reacting arsenic and hydrogen sulphide, antimony trisulphide by reacting antimony trimethyl and hydrogen sulphide, and a glass consisting of mixed oxides of germanium silicon and arsenic by reaction of the hydrides of these elements and air. The second gaseous compound suitably diluted with inert gas is fed into steel chamber 4 via a nozzle 9 which is moved longitudinally and reciprocated transversely to bring it successively over each of semi-conductor wafers 16 disposed on a heated plate 7. The first reactant gas is fed in via ports 5 and 6. Specification 1,281,298 is referred to.
Patent GB-980921-A (GB)
Title: Improvements in or relating to a process and apparatus for plying thin yarns
IPC: D01H1/00
Filed: 1961-05-08
Abstract: 980,921. Plying yarns. E. FEHRER. May 8, 1961 May 17, 1960], No. 16662/61. Headings DID and D1F. In plying two or more yarns by the process in which, in order to offset the loss of singles twist in the plying operation, each yarn is twisted about its longitudinal axis while being fed forward, each yarn is individually untwisted and retwisted in front of the plying print but behind a feed-nip by false-twisting means, and is withdrawn from the false-twisting means at a higher speed than the feeding-speed, so that it is drafted in its untwisted position. The process enables thin yarns of such fibres as coconut to be plied, which fibres lack the strength to be put up in starting yarns of the requisite thickness. As shown, component yarns from packages 1 are fed by a nip 3a of feed-rollers 3 to a collecting-ring 5 and are plied at 8 by a flyer 6 and wound on a braked drum 7, each drum 1 and the corresponding pair of rollers 3 being together mounted on a rotating frame 4. Between nip 3a and ring 5 is provided a false-twisting device which may be a pair of rollers 9 rotating faster than rollers 3, and rotated around the axis of the travelling yarn also faster than rollers 3. The latter rotation of the rollers (a) neutralizes, between the two sets of rollers, the original singles twist and that imparted by the rotation of frame 4 and the former rotation causes the untwisted yarn to be drafted, the distance between the two sets of rollers equalling the average length of the yarn-fibres. This neutralizing twist between rollers 3, 9 is accompanied by the re-insertion of an equal and opposite twist between rollers 9 and ring 5. Rollers 3 may be rotated at a higher speed than that normally necessary to offset the loss of singles twist by an amount necessary to re-insert an equal twist in the thinner yarn produced by the drafting operation. The rollers 3 and 9 may be mounted in a common rotating frame with gearing so that the rollers 3 rotate slower than rollers 9, and the rollers 9 may be replaced by a twist-tube, and a common withdrawing device for the two yarns may be provided to produce the draft. Further, the yarn in packages 1 may have a greater original twist than that required in the component yarns of the final product, the rollers 3 then rotating at the speed at which plying takes place.
Patent GB-318674-A (GB)
Title: Improvements in and relating to the harvesting of sugar cane
IPC: A01D45/10
Filed: 1928-06-09
Abstract: 318,674. Falkiner, R. S., and Charley, W. G. June 9, 1928. Pneumatic separating.- Chopped up cane and trash are discharged on to a support 13 through which a blast of air is forced by a fan 18 to blow off the lighter trash to a baffle D that deflects it to a discharge E. The support 13, which is preferably agitated, is formed by a series of stepped layers ot curved sections 24, air spaces 25 being provided between the layers. A screen 21, preferably fixed, is arranged after the screen 13 and through this screen a stronger blast of air is directed to remove any heavier residual trash. The good cane falls down a shoot 22 that is separated from the trash shoot by an adjustable baffle 23. Specifications 251,739 and 314,415, [both in Class 6 (iii), Harvesting-appliances], are referred to. Specifications 284,683, [Class 6 (iii), Harvesting-appliances], 314,364, [Class 127, Sugar], and 317,352, [Class 6 (iii), Harvesting-appliances], also are referred to in the Provisional Specification.
Patent GB-594849-A (GB)
Title: Improvements in electrically driven pumps and compressors
IPC: F04C15/00
Filed: 1945-07-02
Abstract: 594,849. Rotary pumps and compressors. LEWIS, T. M., PONCE, E. G., and HILLS, A. E. July 2, 1945, No. 16810. [Class 110 (ii)] [Also in Group XXXV] The rotor of an electrically-driven pump or compressor of the outwardly-sliding vane type is disposed between two stators having metallic laminations providing radial pole faces and having windings thereon embedded in a suitable non-conducting material. The electric motor is of the induction type. The rotor e is eccentrically disposed within a casing a and is provided with vanes i sliding in radially disposed slots h. The vanes may be pressed outwards by springs. The rotor body is of non-magnetic conducting material, and has rotor bars g extending through two sets of annular laminations f. The latter are arranged in annular recesses in the rotor body. The laminations c of the stator are set in annular recesses in end plates b, and are formed with radial slots to accommodate windings d. According to the Provisional Specification, the vanes are carried by rods or stems of T-form, the heads of which run in T-slots in the casing ; there may be an axial sleeve valve to control the flow of fluid.
Patent GB-1452189-A (GB)
Title: Railway vehicle derailment detection system
IPC: B61D15/08
Filed: 1974-04-18
Abstract: 1452189 Derailment detector ML ENG (PLYMOUTH) Ltd 18 April 1975 [18 April 1974] 16905/74 Heading B7N A railway vehicle derailment detection system comprises a transmitter 3 on each vehicle of a train energized via a device responsive to the vertical acceleration produced when the vehicle is derailed and a receiver on, e.g. the locomotive of the train which operates an alarm in response to a received signal. Each operation of inertia switch 6 by vertical acceleration forces resulting from derailment discharges a capacitor 7 through the transmitter 3 to generate and transmit an RF pulse of fixed duration and magnitude. The RF pulse is received at the locomotive and passed via filter 11 and amplifier 12 to a pulse gate which only passes pulses of the characteristic form of those developed in the transmitter. These pulses actuate a bi-stable gate 14 to energize audio and visual alarms 15. The bi-stable gate is reset by push-button 16. Alternatively the forces can cause a striker to engage a piezo-electric element across which a transmitting tuned circuit is connected.
Patent GB-690013-A (GB)
Title: Improvements in or relating to electric oscillation generators
Inventor: LAWRANCE GRAHAM FRANCIS
IPC: H03B5/10
Filed: 1951-07-17
Abstract: 690,013. Valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd. July 17, 1951, No. 16932/51. Class 40 (vi). An oscillator of the bridge stabilized type comprises amplifying stages and coupling networks arranged alternately in a loop, one coupling network comprising a bridge network including a temperature dependent resistance, and another a parallel resonant circuit for determining the oscillation frequency. As shown, the bridge comprises the resistors 3, 4 5 and thermistor 6 and the other coupling network comprises a parallel resonant circuit 9, 10.. The anode of valve 1 is connected to a tap on the inductor and the grid of the valve 2 is connected to a capacitative potential divider to reduce the effect of changes of interelectrode capacitance on the frequency. The output may be derived from the cathode of valve 2 or from the potential divider (Fig. 2, not shown). One of the arms 3, 4 or 5 of the bridge may be in the form of a block of thermistor material in order to compensate for changes in ambient temperature. A capacitor 8 across arm 5 neutralizes the effect on the bridge of the output capacity of valve 2. Specification 510,379 is referred to.