baber/WOPTO huggingface dataset:
Patent GB-489861-A (GB)
Title: Improvements relating to light signals for railways and the like
IPC: B61L5/18
Filed: 1937-02-04
Abstract: 489,861. Railway light signals; lamp - failure alarms. MACGREGOR, R. M., and WESTINGHOUSE BRAKE & SIGNAL CO., Ltd. Feb. 4, 1937, No. 3349. [Class 105] [Also in Group XXXVIII] A light signal for railways has a relatively low current flowing through the lamp when it is non- luminous and a lamp-failure relay is so associated with the circuit as to be energized by a current substantially the same whether the lamp is luminous or non-luminous so long as the circuit is intact. The Figure shows an arrangement in which an approaching train renders the signal lamp 1 luminous by closing a contact 8 to shunt out resistances 2, 3 in the circuit to the lamp. At other times these resistances together with a resistance 4 reduce the current below the luminous value and the voltage drop across the resistances 3, 4 is used to energize a relay 14. When the lamp is luminous an increased voltage drop exists across the resistance 4 but the current in the relay 14 remains substantially the same as before since this increased voltage drop is now applied to the relay 14 through the resistances 2, 3 in parallel and so is only partially effective. On failure of the lamp 1 the relay 14 is de-energized and so gives an indication ; in addition the de-energized relay 14 switches in a substitute filament or lamp 16 which may be approach lit by a contact 18.
Patent GB-344166-A (GB)
Title: Improvements relating to the preparation of derivatives of 3:4-dihydroisoquinoline
IPC: C07D217/14
Filed: 1930-01-31
Abstract: 1-Halogen-alkyl or 1-cyano-alkyl derivatives of 3 : 4-dihydroisoquinoline, in which the 6-position is occupied by a methoxy group or the 6- and 7-positions by methoxy groups or by a methylenedioxy group, are produced by dehydrating the appropriately substituted acidyl derivatives of b -m-methoxyphenylethylamine, b -3,4-dimethoxyphenylethylamine or b -piperonylethylamine, by means of a dehydrating agent.  In examples, (1) chloroacetyl-b -veratrylethylamide is dehydrated to 1-chloromethyl-6,7-dimethoxy-3,4-dihydroisoquinoline by means of phosphorus oxychloride in toluene solution; (2) d -chlorovaleryl-b -veratrylethylamide is similarly converted to 1-d -chlorobutyl-6,7-dimethoxy-3,4-dihydroisoquinoline, which is isolated in the form of its picrate; (3) bromoacetyl-b -veratrylethylamide is converted to 1 - bromomethyl - 6 : 7 - dimethoxy-3,4 - dihydroisoquinoline, the picrate of which is separated, by the action of phosphorus pentoxide in xylene solution; (4) the corresponding cyano-derivative is produced from cyanoacetyl-b -veratrylethylamide by the method of (1); (5) chloroacetyl-b -m-methoxyphenylethylamide similarly yields 1-chloromethyl-6 - methoxy - 3,4 - dihydroisoquinoline; (6) chloroacetyl-b -piperonylethylamide is similarly dehydrated to 1 - chloromethyl - 6 : 7 - methylenedioxy-3 : 4-dihydroisoquinoline, which is isolated in the form of its picrate. Phenylethylamine derivatives.-The starting materials of the above process are prepared by condensing acid halides or esters of halogen- or cyano-substituted aliphatic acids with b -methoxyphenylethylamine, b -veratrylethylamine or b -piperonylethylamine.
Patent GB-287129-A (GB)
Title: Improved helical springs
IPC: F16F1/06
Filed: 1928-02-03
Abstract: 287,129. Rafflenbeul, R. March 16, 1927, [Convention date]. Helical springs are constructed wit.h arcuate departures from the true helical shape in the direction of the axis. In the construction shown in Fig. 2, the spring departs from the helical shape three times in each turn alternately in opposite axial directions. Three or other odd number of departures is adopted for each turn in order that adjacent departures in adjacent coils may be opposite axially. These variations are produced in a true helical spring by introducing plugs 9, 10, 11 in suitable positions between the coils and then subjecting the spring to sufficient end pressure to distort it permanently.
Patent GB-137404-A (GB)
Title: Improvements in grinding wheel dressers
IPC: B24B53/14
Filed: 1919-02-12
Abstract: 137,404. Herbert, Sir A., and Dobson, J. Feb. 12, 1919. Tools and tool-holders.-In a grindstone dresser, the spindle F of the dressing-disks G is mounted at each end in one of a ring of holes D in a polygonal carrier C, each carrier being held in a groove C<2> in a. jaw of the holder by a screw; when the bearing-holes in use are worm, the spindle F is moved to a fresh pair of holes D, the carriers being turned accordingly.
Patent GB-495246-A (GB)
Title: Improvements in the valve gear of reciprocating engines
IPC: F01L1/06
Filed: 1938-02-03
Abstract: 495,246. Engine valve-gear. OLSSON, J., and AKTIEBOLAGET GOTAVERKEN. Feb. 3, 1938, No. 3431. [Class 122 (ii)] [Also in Group XXVII] Spring-loaded valves 15 of steam engines are actuated by cams or the like 18, 19 on the crankshaft, pivoted rockers 24, 25 pull rods 27, 28, and a cross-beam 29 connecting these rods to the valve. The beam may be connected to the pull rods and to the valve stem by joints of spherical form. The pull rods may be replaced by push rods, and the cams may act on the rods directly. The cams may be formed on the cranks of the main shaft, or on their counterbalance weights, or may comprise grooves in the crank arms or discs.
Patent GB-776257-A (GB)
Title: Improvements in filter mouthpiece cigarettes
IPC: A24C5/47
Filed: 1954-01-28
Abstract: In the method of producing filter mouthpiece cigarettes by uniting filter bodies to cigarettes by means of uniting bands, the filter bodies are made of smaller diameter than the cigarettes by about twice the thickness of the cigarette paper.  The cigarettes may be formed as described in Fig. 1 of Specification 776,256, but wherein the filter bodies and cigarettes are united by uniting bands.
Patent GB-786699-A (GB)
Title: Improvements in or relating to electricity supply systems
IPC: H02J9/06
Filed: 1956-02-03
Abstract: 786,699 Substituting machines in service. STANDARD TELEPHONES & CABLES, Ltd. Feb. 3, 1956 [Feb. 1, 1955], No. 3467/56. Class 38 (4). A relay for switching-over from a main generator GI to a stand-by generator GII comprises a coil TI, which is energized in accordance with the voltage of the main generator, and a biasing coil TII which is energized from a source of constant voltage. Whilst the generator GI is effective, the relay armature engages contact Z so that the output leads of the other generator are short-circuited and the load W8 is supplied through transformers Tr1, Tr3. Failure of the main generator removes the short-circuit connection so that the load is now supplied through transformers Tr2, Tr3. As soon as the voltage of the generator GI is restored the generator is automatically returned to operation. The generator GII may be selected as the main generator by changing-over switches S1, S2. Relays RI, RII are energized as long as the generators deliver sufficient voltage and serve to indicate any disturbance either optically or acoustically.
Patent GB-376368-A (GB)
Title: Improvements in automatic firearms
IPC: F41A5/26
Filed: 1931-01-02
Abstract: 376,368. Automatic smallarms. WHITE AUTOMATIC GUN CORPORATION, Portland, Maine, U.S.A.-(Assignees of White, J. C. ; 28, Westland Avenue, Boston, U.S.A.) Jan. 2, 1931, No. 3510/32. Convention date, Jan. 8, 1930. Divided on 376,316. [Class 119.] The gas mechanism of a gasoperated automatic smallarm includes a port 12, Fig. 3, in the fore part of the barrel 1, a gas tube 14 having a port communicating with the barrel port, an elongated piston 25 slidable in the gas tube and having an extensive hollow portion leading rearwardly from its fore end, there being a port 25a at an intermediate point of said hollow piston in communication with the gas tube port in the forward or firing position of the parts, and means whereby the piston and tube are exhausted substantially directly to atmosphere, and not through the barrel. The volume of the hollow in the piston and tube is at least about half that of the barrel bore. As soon as the piston moves rearwards, communication between the ports is cut off and the gas trapped in the piston acts by expansion against the return spring 30. Before the full rearward stroke is completed, the port 25a of the piston passes beyond a port cover 14a and the confined gas is exhausted to the atmosphere. On the return stroke, air or gas is trapped in the piston and cushions the movement. The gas tube 14 is attached to the barrel by a port housing 13, a collar 15 depending from a sleeve 16 carrying the base 17 of a front sight 18, and a front screw-plug 20 having a collar 21 fitting round the barrel, which may be provided with upwardly directed ports 22 and with a muzzle nut 23 having radial vents 24. The piston 25 is separably connected by a lug 29 to an action-tube 27 containing the return spring 30, which takes its abutment against a seat 31, Fig. 4, on a guide rod 32 fitted in a lug 10 of the receiver and bearing on the lug by a shoulder 33. The tube 27 is connected to an actionslide or fork 28 for operating the breech mechanism as described in Specification 376,316.
Patent GB-510709-A (GB)
Title: Improvements in or relating to cooling arrangements for machine guns in aircraft
IPC: F41A13/12
Filed: 1938-02-04
Abstract: 510,709. Aircraft guns. BRISTOL AEROPLANE CO., Ltd., FRISE, L. G., and PONTING, R. Feb. 4, 1938, No. 3568. [Class 92 (ii)] A cooling device for the breech parts 18 of machine guns mounted in the wings 13 or other hollow structural parts of aircraft comprises an air-inlet valve 20 connected to the gun firing mechanism so that the flow of cooling air is established when the gun is fired and is interrupted, with or without delay, when firing ceases. In the wing mounting shown, the hydraulic pipe lines 27 leading to the firing and safety controls 26 of the gun are also connected by a pipe 28 to a spring-controlled piston-andcylinder device 24 for actuating the valve 20. Cooling air enters the wing by a passage 19 and after passing over the gun breech, leaves by a passage 17. If electric leads are used for firing, these may be connected to the electromagnet for actuating the valve 20.
Patent GB-524688-A (GB)
Title: Improvements in or relating to pouring devices for milk bottles
IPC: B65D47/12
Filed: 1939-02-03
Abstract: 524,688. Bottles &c. MUSHAM, H. H., and PRESTON, H. Feb. 3, 1939, No. 3579. [Class 125 (i)] A pouring device for milk and like containers comprises an inverted dish shaped member 4, Fig. 1, adapted to engage an internally flanged bottle neck 3. The top of the pourer is flat and has a tapering slot as at 5, Fig. 2, or may have two annular orifices, one for air and one for milk. The pourer may have a cover 7 provided with inside projections 7a which space it from the pourer and allow ingress of air. The device may be made of rubber or other suitable material and serves to prevent contamination of the contents of the bottle.
Patent GB-229293-A (GB)
Title: Filing system
IPC: B42F17/08
Filed: 1925-02-09
Abstract: 229,293. Joly, F. M. J. Feb. 13, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Racks. - A box for sorting index cards &c. comprises a number of divisions I, II, III corresponding to the number of letters in the index words used in the sorting, each division having compartments a corresponding to each letter in the alphabet, and the corresponding compartments in each division being successively reduced in size. Index cards. - The index cards are provided with spaces b. Fig. 4, for inserting the index letters corresponding to the divisions.
Patent GB-1125174-A (GB)
Title: Mine roof support assemblies
IPC: E21D23/00
Filed: 1966-01-27
Abstract: 1,125,174. Advancing mine roof supports. GEWERKSCHAFT EISENHUTTE WESTFALIA. 27 Jan., 1966 [8 Feb., 1965], No. 3679/66. Heading E1E. In an advancing mine roof support comprising two frames arranged in parallel for relative stepwise advancement each frame is provided with its own advancing jack, the cylinders 16, 17 of which are secured to an I- girder guide rail 18 as shown whilst the piston rods 14, 15 respectively are restrained from rotating relative to the guide rail by skids 19. The frames are attached to the jacks by stirrups 12', 13' which are reinforced at 20. In a modification, Figs. I and 2 (not shown), the jacks are disposed at the same level as one another on either side of the rail and the stirrups are replaced by straps. In a second modification, Figs. 5 and 6 (not shown), the cylinders of the jacks are slidably disposed in superimposed relationship and the piston rods thereof are interconnected at their ends to one another.
Patent GB-600620-A (GB)
Title: Improvements relating to means for measuring or indicating the ratio of two forces, and applications thereof to mach number indicators
IPC: G01P5/175
Filed: 1945-02-14
Abstract: 600,620. Variable contact resistances. POWER JETS (RESEARCH & DEVELOPMENT), Ltd., and SMITH, A. G. Feb. 14, 1945, No. 3753. [Class 37] [Also in Groups XIX and XXXVIII] In a device for indicating the Mach number of a stream of fluid, a capsule 14 is in communication with a pitot head and a capsule 15 with a static head. Pins 16, 17 of the capsules bear upon a rigid beam 20 suspended by a link 21, the beam bearing against a curved supporting member 25 over which it rolls until a position of equilibrium is reached. The support member 25 may embody a potentiometer so that the resistances in an electric circuit from a terminal 39, through the. point of contact between the curved support and the rigid beam 20, the link 21 and an earth connection 37, varies in proportion to the ratio of the two pressures, the result being indicated by a suitably graduated galvanometer. To minimize friction, the beam may be formed with a pair of parallel knife edges 35, 36 contacting conducting strips 34 on a supporting member 25.
Patent GB-197046-A (GB)
Title: Changeable electric code switch
IPC: H01H27/10
Filed: 1922-02-10
Abstract: 197,046. Ellis, J. A. E. A. Feb. 10, 1922. Secret contact-combination switches.-A secret contact-combination switch of cylindrical shape has a flanged base plate C on which is secured an inverted cup-shaped casing A. Rotatable around the casing A are three flanged annular lettered rings B<1>, B<2>, B<3> having an internal slot corresponding to each letter. Within these rings are insulating rings G<1>, G<2>, G<3> each having a projection which may fit into one of the internal slots of the code rings. Within the projections of the rings G<1>, G<2>, G<3> are contacts, the upper and lower being angle shaped and the centre in the form of a pin adapted to connect adjacent limbs of the upper and lower contacts. The incoming leads pass to pins O<1>, O<2> mounted in an insulating block M, the outer ends of these pins passing through insulated holes T<1>, T<2> in the side of the casing A. The block M is secured by a metal band P to an eccentrically bored sleeve L working on a central bolt H. The sleeve L terminates in a toothed collar on which is mounted an adjustable numbered wheel E. If the wheel E is turned to bring a predetermined number between marks on the casing A the ends of the pins O<1>, O<2> are moved by the eccentric sleeve L to touch the inner peripheries of rings G<1>, G<3>, and if these rings and the centre ring have been moved to bring their predetermined code letters within the marks on the casing A the circuit between the leads S<1>, S<2> is completed. Alternatively the contacts may be arranged, in cases where the switch is included in a motor car ignition circuit, to break circuit only when the code combination of wheels E, B<1>, B<2> and B<3> is set. To alter the code the wheels B<1>, B<2>, B<3> are removed and the insulating rings G<1>, G<2>, G<3> moved to bring their projections into internal recesses of the outer rings corresponding to letters in the new code, the numbered disc E being also moved to a new position on the toothed collar at the upper end of the sleeve L. A cover D is arranged above the rings B<1>, B<2>, B<3> to keep them in position and has an internal annular slot, the flange being cut away to co-operate with projections U<1>, U<2> of the casing A forming a bayonet fastening. To prevent unauthorized removal of the cover D locking bolts N, N<2> are provided projecting through the sides of the casing A to engage the internal flange of the cover. The bolts are withdrawn by rotating a lettered wheel F attached to an eccentric sleeve K, the inner ends of the bolts N, N<2> terminating in sheaves Y, Z surrounding the lower end of the sleeve R. The wheel F may be adjusted on the toothed end of the sleeve K to vary the code number for releasing the cover. To clamp the rings tightly after setting the code a central bolt H is provided which screws into the base plate C.
Patent GB-830794-A (GB)
Title: Unsaturated polyesters and process for preparing same
IPC: C07C35/29
Filed: 1957-02-06
Abstract: Endomethylenetetrahydrophthalyl alcohol is obtained as a colourless oil by heating to 175-180 DEG  C. in a pressure vessel a mixture of butene-2-diol-1 : 4 and cyclopentadiene dissolved in dioxane and thereafter vacuum ditilling the resulting product. The alcohol is polyesterified with an unsaturated dicarboxylic acid to make a polyester (see Group IV (a)).  Specification 735,415 is referred to.ALSO:A new unsaturated polyester, copolymerizable with vinyl or allyl compounds to give products free from surface tackiness, is the esterification product of endomethylenetetrahydrophthalyl alcohol and an alpha, beta-unsaturated dicarboxylic acid, e.g. maleic, fumaric, citraconic or itaconic acid.  Part of the unsaturated dicarboxylic acid may be replaced by phthalic, adipic, endomethylenetetrahydrophthalic or tetrahydrophthalic acid and part of the endomethylenetetrahydrophthalyl alcohol may be replaced by ethylene, propylene or butylene glycol. Esterification is effected by heating the reactants up to a temperature of 240 DEG  C. in an inert gas and in the presence of a polymerization inhibitor, e.g. hydroquinone.  The unsaturated polyester may be copolymerized with styrene, nuclear substituted styrenes, diallyl phthalate or triallyl cyanurate.  In examples polyesters were prepared from (1)-(4) Maleic, fumaric, citraconic or itaconic acid or anhydride, 1,3-butylene glycol and endomethylene tetrahydrophthalyl alcohol.  (5) and (6) Maleic anhydride, 1,3-butylene glycol, endomethylene tetrahydrophthalyl alcohol and either endomethylene tetrahydrophthalic acid or a p  mixture of phthalic and adipic acids. (7) Maleic anhydride, 1,3-butylene glycol and endomethylenetetrahydrophthalyl alcohol. (8) Maleic anhydride, phthalic anhydride, ethylene or propylene glycol and endomethylenetetrahydrophthalyl alcohol.  (9) and (10) Maleic anhydride, phthalic anhydride and endomethylenetetrahydrophthalyl alcohol or a mixture thereof with ethylene glycol.  Lacquers were made by dissolving the polyesters in styrene and adding, as a polymerization catalyst, a mixture of cyclohexanone peroxide or cumene hydroperoxide and cobalt naphthenate.  Specification 735,415 is referred to.
Patent GB-123428-A (GB)
Title: An Improved Method and Machine for Punching Holes in Metal Plates.
Inventor: THOMPSON WILLIAM BRUCE
IPC: B21D28/26
Filed: 1918-03-08
Abstract: 123,428. Thompson, W. B. March 8, 1918. Punching. - A punch ing - machine suspended from overhead operates upon the overhung edges of a plate resting on a stationary base. The machine d w o r k e d hydraulically, electrically &c. is supported movably on an overhead carrier c and is adjusted by hand or power to engage the edges of a plate a on a stationary base b.
Patent GB-541745-A (GB)
Title: Improvements in measuring the delivery of fluids
IPC: G01F5/00
Filed: 1940-03-05
Abstract: 541,745. Flow meters. SOC. FRANCAISE DES REGULATEURS UNIVERSELS ARCA. March 5, 1940, No. 4151. Convention date, March 10, 1939. [Class 69 (i)] [Also in Group XIX] In apparatus for measuring loss of head and delivery of fluid in a conduit by utilizing the difference in pressure between two points in said conduit created by the flow of the fluid, first and second chambers communicate with the conduit at said points, and the first or high pressure chamber includes a constant level reservoir for an auxiliary fluid immiscible with, and heavier than, the fluid to be measured, means including a calibrated orifice delivering auxiliary fluid from said reservoir to the second chamber from which it is discharged through means including a second calibrated orifice smaller than the first and cooperating with measuring means. In Fig. 1, the conduit 1 for the fluid to be measured contains an apertured diaphragm 3 the upstream and downstream sides of which are connected to chambers 4, 5; chamber 4 contains a constant level reservoir 8 to which liquid is delivered by a pump 10, overflow returning by a pipe 14. A pipe 15, with a calibrated orifice 17 at the level of the liquid in the reservoir 8, leads from the latter to the chamber 5, flow through the orifice 17 being proportional to that in the conduit 1. This flow may be measured by a tube 18 and an orifice 19 smaller than the orifice 17; the inlet of tube 18 may be in the chamber 5 and the outlet open to atmospheric pressure, or they may open to enclosed spaces under different or similar pressures, or the inlet to the tube 18 may be provided with a pressure reducing device such as a U-tube 20. A pressure gauge 21 may be provided, and the flow through orifice 19 may be measured by a meter 22. In another form, the orifice 17 is submerged and arranged in the wall 16 dividing chambers 4, 5, and opens into a reservoir 23 in chamber 5 similar to reservoir 8 as in Fig. 3 and the orifice 19 is also submerged. In a further form, Fig. 3, the pump 10 has a constant delivery and the pipes 14, 18, lead through calibrated orifices 27, 19, to a common tank 25 and are connected by a differential manometer 21. This form may be modified by dividing the tank 25 into two parts each with a separate overflow, the orifices 19, 27, opening one into each part. If the liquid used is viscous, or is a non-wetting liquid such as mercury, the upper edges of reservoirs 8 and 23 are serrated as in Fig. 3.
Patent GB-607749-A (GB)
Title: Improvements in or relating to compression ignition engines
IPC: F01L13/08
Filed: 1946-02-11
Abstract: 607,749. Starting. COVENTRY CLIMAX ENGINES, Ltd., and HATHAWAY, L. Feb. 11, 1946, No. 4222. [Class 7 (v)] A compression-ignition engine has a passage provided in the engine wall or cover, one end of which being directed towards the air inlet port of the cylinder, or leading to a chamber communicating with said port, and the other end being accessible from the exterior of the engine so that lubricating oil or other liquid may be introduced into the cylinder to facilitate starting, this end also being provided with telescopically slidable sealing means. The oil or other liquid increases the compression ratio of the cylinder thereby increasing the heat generated during the compression stroke. If the liquid is more volatile than the engine fuel oil, the engine will start at its normal compression ratio when cold. In Fig. 2, an air intake channel 12 is situated above passages 13 leading to the inlet ports and a tube 21 leads from the channel above each port to a cup member 20 which is normally closed by a cap 23 slidable in the cup. In Fig. 3, a passage 27 leading from the exterior of the engine to the passage 13 is closed by a cylindrical sleeve part 29 which can be moved against the action of a spring 31 to uncover the open end of the passage.