baber/WOPTO huggingface dataset:
Patent GB-774838-A (GB)
Title: Improvements in or relating to gripper mechanism of sheet conveying machines
IPC: B41F21/10
Filed: 1955-04-28
Abstract: 774,838. Printing machines. FABER & SCHLEICHER AKT.-GES. April 28, 1955 [May 5, 1954], No. 12284/55. Class 100(2) Gripper mechanism. In sheet-conveying apparatus, such as endless chains or impression cylinders in printing machines, which employ grippers urged to the closed sheet-gripping position by resilient means, an auxiliary gripper control means is provided for periodically increasing the pressure exerted by the grippers on the sheets during conveyance of the sheets in a working cycle: As shown, the impression cylinder 1 of a printing machine has a number of grippers 4 freely mounted on a transverse shaft 2 to which is secured a twoarmed lever 5. A rod 9, pivoted at 11 to one end of the lever 5 and slidable in a fixed mounting 10, has a compression spring 6 thereon which urges the shaft 2 clockwise, and each gripper 4 is urged against a bar 3 by means of a tension spring 8 connected with the gripper and a hook 27 movable with the shaft 2. The other end of the lever 5 carries a roller 13 engaging a cam 15 secured to the frame of the machine, whereby the shaft 2 is rocked intermittently to open and close the grippers. A second control cam 16 secured to the machine frame extends around the circumference of the cylinder except at the high parts of the cam 15, and is so shaped that it acts on the roller 13 when the grippers 4 are closed to impart to the shaft 2 an additional clockwise rotation. This causes the springs 8 to extend further and produce increased pressure between the grippers 4 and bar 3 for a predetermined period. In a modification, the second control cam 16 acts to further compress the -spring 6 and so cause increased gripper pressure.
Patent GB-513967-A (GB)
Title: Improvements in or relating to brakes for trailers of motor vehicles
IPC: B60T15/18
Filed: 1938-04-25
Abstract: 513,967. Fluid-pressure brakes. BOSCH GES., R. (formerly BOSCH AKT.-GES.,'R.). April 25, 1938, No. 12289. Convention date, April 24, 1937. [Class 103 (i)] In a fluid-pressure brake for trailer vehicles which is normally controlled from the towing vehicle by a brake pipe and a control valve on the trailer the valve being influenced by the pressures in the brake pipe, trailer brake cylinder and trailer reservoir, an auxiliary valve provided for releasing and applying the brake on the uncoupled trailer connects the cylinder to atmosphere and the reservoir independently of the control valve. The control valve for normal operation comprises pistons 12, 13 and a wall 14 defining chambers 15 ... 18 connected respectively to the atmosphere at 19, to the brake pipe 21 leading to the main control valve on the tractor vehicle, to the reservoir 23 by pipe 22 and to the brake cylinder 25 by pipe 24. The pistons are secured to a tubular rod 11 adapted to engage a disc valve 31 normally seated by a spring 30 to disconnect chamber 27, connected to reservoir 23, from chamber 18. The reservoir 23 is supplied from pipe 21 through chambers 16, 17 and a collar 26 which acts as a non-return valve. Reduction of the pressure in pipe 21 and chamber 16 effects downward movement of the pistons unseating valve 31 to supply the cylinder 25 the pistons and .valve returning to the position shown when equilibrium of the pressures in the chambers, is re-established. When the pressure in pipe 21 is again raised the pistons move upwardly, the rod 11 leaves the valve 31 and the cylinder pressure exhausts through the rod and outlet 19. The additional valve for controlling the brakes on the uncoupled trailer comprises a plug 35 operated by a hand lever 36 and having a through passage 42 which normally connects the pipe parts 24 as shown. To release the brake the plug is turned to connect the lower pipe 24 to an outlet 39 by an extension 43 of passage 42 and to re-apply the brake the plug is turned to connect this pipe by passage 42 to a pipe 41 leading to the reservoir 23.
Patent GB-402997-A (GB)
Title: Improvements in or relating to composite aircraft
IPC: B64D5/00
Filed: 1933-04-27
Abstract: 402,997. Aircraft for launching other aircraft. MAYO, R. H., 39, St. James's Street, Pall Mall, London. April 27, 1933, No. 12310. [Class 4.] A composite aircraft comprising two aeroplanes each capable of separate flight mounted one on top of the other and connected by releasable locking means to enable the composite aircraft to take off, fly and land as a single unit, has means for preventing release of the locking means until the wings of the upper aeroplane have sufficient lift to ensure safe separation of the two machines and independent controlled flight of the upper one immediately after such separation. Additional locking means released only by the combined or consecutive operation of controls located in both machines may be provided, and the flying controls of the upper machine may be locked until the machines are about to separate. The release may also be made contingent upon correct air speed. The axle 5, Fig. 3, and a rear shaft on the upper machine rest in forwardly inclined forks on the lower machine and the machines are held together by one or more tension members 7, Fig. 2, which can be tightened by turnbuckles 12. The member 7 engages a hooked member 10 connected to a spring 14 so that the machines are held together until excess lift is sufficient to turn the member 10 against the tension of the spring 14 and allow the member 7 to slip off the hook. The member 10 may be normally held against movement by a catch 16 connected by a cable 19 to a lever 22 movable by a cable 24 from the cockpit of the upper machine, the lever 22 in turn being normally prevented from moving by a detent 26 connected to a cable 27 leading to the cockpit of the other machine. A spring 29 acting on the detent passes the dead centre when the cable 27 is pulled and a slot 28 allows the cable to fall clear. There may be three automatic release devices, two laterally placed ones being released before the centre one. Alternatively the upper machine may be prevented from moving out of the forks on the lower machine by spring pressed balls or rollers 30, Fig. 3 which yield when a predetermined lift is reached. There may also be positive locking pins across the forks releasable by the combined or consecutive operation of two controls in the respective machines. There may also be levers across the forks connected to the engine controls of the lower machine to ensure the shutting down of the engine of the lower machine or for actuating air brakes or lift spoiling devices thereon as the upper machine leaves the forks. The means for locking the flying controls may be operated by the same control lever as that which operates the cable 24, Fig. 2, or it may be operated by the hooked member 10. A wind vane or windmill may actuate a pin for locking one of the previously described control elements to prevent actuation unless the air speed is of a predetermined value. Specifications 400,292, 402,895, and 402,951 are referred to.
Patent GB-1337046-A (GB)
Title: Electrodynamometer
IPC: G01L3/22
Filed: 1971-04-30
Abstract: 1337046 Dynamometers LAB-VOLT (QUEBEC) Ltd 30 April 1971 [6 July 1970] 12317/71 Heading G1W [Also in Division H2] In an electrodynamometer for measuring the torque of an electric motor and comprising a stator 34 which includes a winding 36 energizable by a variable D.C. source to produce a predetermined number of magnetic poles and is angularly movably mounted on a supporting structure, the torque characteristic is made more suitable for motors e.g. induction and D.C. motors having high starting torques by providing the rotor 48 with a squirrelcage 50, 52 and mounting it rotatably within the stator to which it is coupled to develop a torque tending to rotate the latter, there also being provided a spring 68 inter-connecting the stator and the structure for conveying. The torque exerted on the stator, together with means e.g. a scale 82 and pointer 84 for measuring the amount of stator movement against the spring action and hence indicating the motor torque. The rotor is required to have a low resistance to inductance ratio, and, as shown, is connectable to the motor via a pulley 66. The stator is mounted in supports 62, 64 and connected by a clamping member 70 to the torsion spring which is in turn clamped by a member 74 to a support 76, the number of spring turns being, adjustable to vary the calibration, and the stator movement being limited by stops 85. The torque developed is also adjustable by varying the direct excitation current fed through wires 80, by moving a tap 92 of an input auto-transformer 90 connected between A.C. supply terminals 86, 88 and a diode bridge 94. Cooling is by radial fins die-cast on the rotor.
Patent GB-331610-A (GB)
Title: Improvements in the recovery of acetylene from gaseous mixtures
IPC: C07C7/11
Filed: 1929-04-20
Abstract: 331,610. Hull, P. H., and Imperial Chemical Industries, Ltd. April 20, 1929. Acetaldehyde.- Acetylene is recovered from gaseous mixtures by washing with a limited amount of an aqueous solution of sulphuric acid and mercuric sulphate in a plurality of stages, the pressure on the gas being increased between each stage. The pressure at any stage should be such that the partial pressure of acetylene does not exceed 2 atm. Specification 280,885, [Class 2 (i), Acetylene.], is referred to. ,
Patent GB-513971-A (GB)
Title: Improvements in or relating to the driving of the superchargers of internal combustion engines
IPC: F02B39/10
Filed: 1938-04-25
Abstract: 513,971. Centrifugal fans. SULZER FRERES SOC. ANON. ' April 25, 1938, No: 12345. Convention date, June 17, 1937. [Class 110 (i)]. [Also in Group XXVII] Direct-drive.-The drive of a charging blower c which is normally effected by an exhaustdriven turbine b, is assisted, when required, by an electric motor e operating on the threephase high-frequency system. The motor, which rotates at such a high speed that stepup gearing in the drive is not necessary, is supplied with current automatically, at reduced blower speeds, by a generator d driven by the engine, but the motor and the generator should be independently excited so that they can both be started together. If the engine is: reversible, a change-over switch is provided, so that the motor continues to rotate in the same direction when the engine and generator are reversed.
Patent GB-1247654-A (GB)
Title: Light sensitive supersensitised silver halide photographic emulsion
IPC: G03C1/29
Filed: 1970-03-13
Abstract: 1,247,654. Light-sensitive supersensitized silver halide photographic emulsion. KONISHIROKU PHOTO INDUSTRY CO Ltd. March 13, 1970 [March 14, 1969j, No. 12345/70. Heading G2C. A light-sensitive silver halide photographic emulsion comprises at least one spectral sensitizing dye of the formula: wherein R 1  is an alkyl group having 1 to 4 carbons, R 2  is a sulphoalkyl or a carboxyalkyl group having 1 to 4 carbons in the alkyl portion, or an alkoxyalkyl group, the alkyl and alkoxy portions of which have 1 to 4 carbons each, and the alkoxy portion of which is substituted by a sulpho group or by a sulpho group and a hydroxy group, each of W 1  and W 2  independently is H or alkyl having 1 to 4 carbons, Z is S or Se, X<SP>-</SP> is an anion and n is 1 or 2, in supersensitizing combination with a spectral sensitizing dye of the formula wherein each of R 3  and R 4  independently is alkyl having 1 to 4 carbons which may be substituted or unsubstituted, each of R 5  and R 6  independently is alkyl having 1 to 4 carbons, a hydroxyalkyl or sulphoalkyl group having 1 to 4 carbons or an alkoxyalkyl group, the alkyl and alkoxy portions of which have 1 to 4 carbons each, and the alkoxy portion of which is substituted by a sulpho group or by a sulpho group and a hydroxy group, each of Y 1  and Y 2  independently represents an n-propyl, iso-propyl, n-butyl, iso-butyl or phenyl group, X<SP>-</SP> is an anion, and n is 1 or 2. The emulsion may be a colour emulsion and may contain a magenta colour coupler. This supersensitizing combination has stable greensensitivity even at high temperature and high humidity and does not cause any dye contamination in the resulting film after treatment. The emulsion generates little or no fog even when handled under a safe light having a wavelength of more than 600m Á.
Patent GB-289479-A (GB)
Title: Improvements in and relating to electric clocks operated by dry batteries
IPC: G04C3/00
Filed: 1928-04-27
Abstract: 289,479. Busse, F. M. April 29, 1927, [Convention date]. Electric clocks; clock cases; hand setting apparatus.-To protect the movement of an electric clock from dust and from vapours from the battery, a double telescoping case is used, the movement being mounted in the inner case, and the battery in the outer case and on the outside of the inner case. The movement a and winding magnet b are on a plate c over which is placed the inner case g. A contact pin f connected with the magnet by a lead e projects through a hole k and a second contact pin m is mounted on the inner case. These pins contact with the poles of the dry battery o which is mounted between clips p. The outer case q is mounted over the inner case as shown and is removed by pressing on a button r which is mounted resiliently on the outer casing. A regulating lever i projects through a slit h in the inner case and may be reached by merely removing the outer case. The hand setting shaft projects through both cases. In a modification of the latter, the hand setting shaft is replaced by gearing of which the last wheel u, Fig. 5, reaches into an opening v in the side of the inner case.
Patent GB-149769-A (GB)
Title: Improved process for the manufacture of alumina
IPC: C01F7/28
Filed: 1919-05-17
Abstract: Alumina is obtained from bauxite or other aluminous material by furnacing the latter in the presence of sulphur dioxide, air and steam, lixiviating the product, and then decomposing the resulting ferruginous solution of aluminium sulphate by means of sodium thiosulphate according to the equation:  Al2(SO4)3 + 3 Na2S2O3 = Al2O3 + 3 SO2 + 3 S + 3 Na2SO4. The precipitate of alumina and sulphur is calcined to produce pure alumina and sulphur dioxide.  In order to make the process cyclic, the sulphur dioxide from this source, as well as that evolved according to the equation, may be utilized both for the furnacing operation and for the regeneration of the sodium thiosulphate. The latter is prepared by evaporating to dryness the solution of sodium sulphite which remains after filtering-off the alumina and sulphur, reducing the sulphate to sulphide by means of carbon, and then passing air and sulphur dioxide into the aqueous solution of sodium sulphide.  If the process is not intended to be cyclic, the sulphur is separated from the precipitated alumina by distillation or dissolution.  To facilitate the furnacing operation, the gases may be passed over a catalyst such as ferric oxide; or a catalyst, such as aluminium or other chloride, may be added to the bauxite.
Patent GB-1433327-A (GB)
Title: Display devices
IPC: G09F9/305
Filed: 1972-03-17
Abstract: 1433327 Matrix displays P J AXBEY 4 April 1973 [17 March 1972] 12546/72 Heading G5C [Also in Division H4] A display device, e.g. for television pictures, comprises a plurality of optic fibres 12 which terminate at one end 14 in a predetermined order, see Fig. 1 (not shown), to form a plane light-emitting surface 16, and at the other end 15 to form a light-receiving surface 20, and means 26 for controlling light emitted at 16 to synthesise the picture, and means 42 for varying the intensity of light emitted at 16. The fibres 12 are grouped in three bundles (18) each illuminated by a source 24 of one of the three primary colours, and the means 26, 42, the positions of which may be reversed, are variably scattering liquid crystals 28, 44 having transparent conductors 34, 36, 46, 48 to which suitable electric connection is made. The potential is applied to the cell 28 in a manner similar to the line and frame timebase of a conventional television receiver.
Patent GB-250408-A (GB)
Title: Improvements in or relating to sole pressing apparatus for use in the manufacture and repair of boots and shoes
IPC: A43D25/06
Filed: 1925-05-14
Abstract: 250,408. Cann, T. E. May 14, 1925. Sole-laying.-In a sole-laying press the base 1 which carries the resilient sole support 12 is provided with a removable heel piece 4 so that the press may be used for laying whole or half soles. The support 12 is, preferably, of sponge rubber, and may be in two pieces as shown. The heel piece 4 has a rear supporting lug 8 and two forward lugs 7. When the apparatus is provided in duplicate the outer lugs 7 may engage holes in the base plate to keep the heel piece in place. A jack member 16 is provided with a socket 28 to engage a spigot on a jack stand (not shown) for use when inserting the jack into the shoe. The mounting for the thrust screw 25 is adjustable lengthwise of the shoe. Specification 211,704 is referred to.
Patent GB-1460015-A (GB)
Title: Dispensing device and method
IPC: B21D51/46
Filed: 1973-03-16
Abstract: 1460015 Dispensing fluent materials WR GRACE & CO 13 March 1974 [16 March 1973] 12691/73 Heading A4T A device e.g. for applying metered quantities of adhesive cement to can side wall blanks comprises a continuously operable pump having an outlet conduit 1a communicating with an intermittently operable dispensing gun 2 having a needle valve 1, opening of which allows the cement to be dispensed while closing interrupts dispensing. Pelletized or powdered material from a vibratory feeder 8 enters a feed hopper 7 of the pump, which comprises a screw conveyer 1 including a screw 38, slidable axially relative to a driving cog 37 which is driven continuously by a motor 4 during operation, and biased towards the delivery end of a conveyer chamber 39 by a hydraulic ram 40. Heating means 31, (32), (33), Fig. 3b (not shown), is preferably provided around the conveyer chamber 39, controlled by thermocouples 34, (35), (36), and a compression zone of the conveyer 1 leads through a metering zone to an inlet 19 of the gun 2. Blanks are fed continuously along a path 3, and a detector 10 operates to raise a pneumatic piston 25 when a blank reaches the gun 2, thus raising the valve needle 23 and allowing the cement to be dispensed through a nozzle 24 until the end of the blank is sensed. During the closed phases of the gun 2, pressure build-up within the conveyer 1 acts on the ram 40, in opposition to the pressure generated by a pump 41, fluid escape through a relief valve 43 allowing the screw 38 to retract until the gun is once more operated, while a limit switch 46 acts to slow down or interrupt the drive to the screw 38 in the event of full retraction before further dispensing. Alternatively, Fig. 4 (not shown), pressure buildup in the conveyer 1 may be released by a return line (47) from the gun (2<SP>1</SP>) through a gate valve 51 to a decompression zone (48) of the conveyer.
Patent GB-310659-A (GB)
Title: Improvements in and relating to safety detaching hooks for colliery and like windinggear
IPC: B66C1/00
Filed: 1928-05-01
Abstract: 310,659. Ormerod, A., and Barker, R. H. May 1, 1928. Hooks, automatic-release. -In a safety detaching hook for colliery &c. winding-gear of the kind in which the two parts of the hook are connected by a copper rivet 12 which is sheared when the parts are forced together, auxiliary connecting copper rivets 16 are provided which are sheared by the movement of pivoted lugs 13 caused by the bell-mouth 17 before the parts are forced together to shear the rivet 12. Specifications 133,486 and 266,134, [both in Class 24, Chains &c.], are referred to.
Patent GB-644226-A (GB)
Title: Improvements relating to archery arrows
Inventor: WAGG REGINALD
IPC: F42B6/06
Filed: 1948-05-11
Abstract: 644,226. Archery arrows. ACCLES & POLLOCK, Ltd. May 11, 1948, No. 12889. [Class 132 (iii)] An archery arrow with a tubular steel shaft b has a separately formed pointed end piece a to receive a detachable nock. The pointed piece a is a shouldered steel tube inserted in the shaft or is placed over the end of the preferably pointed shaft b. The parts are received by brazing swaging or drawing through a die, and the outer member a is preferably reduced to the diameter of the shaft.
Patent GB-1521623-A (GB)
Title: Electrical discharge machining method and device
IPC: B23H1/00
Filed: 1976-03-31
Abstract: 1521623 Automatic control of electro-erosion ATELIERS DES CHARMILLES SA 31 March 1976 [7 April 1975] 12895/76 Heading G3R In an electro-erosion process, a parameter characterizing the sparking gap conditions is stabilized by adjusting the size of the gap. Penetration of the working electrode into the workpiece beyond a predetermined position is automatically prevented. As shown in Fig. 1, an electrode 1 and workpiece 2 receive intermittent discharge pulses from a D.C. source S and chopper 4 controlled by a pulse generator 5. A sensing circuit 6 receives signals representing the current and voltage in the gap, and produces an output U which is compared with a reference potential 8 in an operational amplifier 7. The result-  ing difference signal A is amplified 9 to form a signal which controls the drive 10 of the electrode 1. The position reached by the electrode is sensed by a fixed winding 11 co-operating with a movable core 11a attached to the electrode by an arm 12. When a pre-set position, set by a screw 13, is reached, a signal supplied through an amplifier 16 becomes negative and reduces the stabilizing signal from amplifier 7 until a limit position is reached and machining stops, with the size of the gap 3 at a maximum value. In another embodiment, Fig. 2 (not shown), field effect transistors are used as switches in the output circuits of the amplifiers 7, 16. In this case, further advance of the electrode beyond the pre-set position is prevented, although withdrawal by the stablizing loop is possible. A further embodiment, Fig. 3 (not shown), uses a digital position sensor and comparator, and has the amplifier 16 connected as an integrator. In another arrangement, Fig. 4 (not shown), the electrode moves cyclically in two dimensions, and the amplitude of the electrode motion is limited to a predetermined value.
Patent GB-495051-A (GB)
Title: Improvements in or relating to the manufacture of white lead
IPC: C09C1/16
Filed: 1937-05-06
Abstract: <PICT:0495051/III/1> For the production of white lead, a pure solution of basic lead acetate, formed for example from litharge and dilute acetic acid, is sprayed with or by a current of carbon dioxide.  The separated white lead may be mixed with a quantity of lead oxide in a rotary drum into which carbon dioxide is passed, whereby uncombined lead acetates are converted into white lead.  In the plant shown, litharge and dilute acetic acid are mixed in vessel a, and the resulting basic lead acetate solution of 10-25 B<\>ae. is decanted into tank d in which it is heated to 20-85 DEG  C. by a steam coil e or other heating device.  The temperature employed varies inversely with the density of the solution.  The tank d is connected to an injector g comprising two concentric nozzles, the inner one of which is supplied by carbon dioxide from pressure reservoir i.  A heating jacket j surrounds the carbon dioxide supply pipe.  The basic lead acetate solution is sprayed by the carbon dioxide into a chamber k, excess of the gas escaping through passage o to a compressor.  Alternatively, the solution may be under pressure to cause the injection action instead of the gas, which may be under atmospheric or increased pressure.  White lead precipitated in chamber k passes to a settling tank m whence it is withdrawn through outlet n.  The solution containing unreacted basic lead acetate overflows into tank p from which it is pumped by pump q to the mixing vessel a for admixture with the required amount of litharge and acetic acid.