baber/WOPTO huggingface dataset:
Patent GB-605136-A (GB)
Title: Improvements in or relating to means for facilitating the removal of spent cartridges from barrels of guns
IPC: F41A21/12
Filed: 1945-12-14
Abstract: 605,136. Cartridge chambers ; cartridge cases. SHEPHERD, R. V., WHEELER, W. E., DOWNING, C. H., and MITCHELL, S. S. C. Dec. 14, 1945, No. 33975. [Classes 9 (i) and 119] To control the expansion of a cartridge case so as to permit of its easy extraction from the cartridge chamber of a gun, a portion of the propellant gases are directed rearwardly over the case. This may be done either by forming longitudinal flutes 5, Fig. 1, in the chamber 2 of the barrel 1, or by providing flutes 27, Fig. 17, on the front part of the cartridge case. The flutes when formed in the chamber may vary in depth or width, or both, and may be triangular in cross-section, square or semicircular with or without sharp edges. The flutes may run longitudinally of the weapon, or they may be helical. The flutes in a cartridge case may also be arranged helically. Reference has been directed by the Comptroller to Specifications 3891/14, 8943/15 and 306,854, [all in Class 119].
Patent GB-608877-A (GB)
Title: Improvements relating to sealing packing
IPC: F16J15/20
Filed: 1945-12-17
Abstract: 608,877. Piston and stuffing-box packing. SEAMARK, L. M. C. Dec. 17, 1945, No. 34133. [Classes 122 (i) and 122 (v)] A non-metallic packing ring 3 has embedded adjacent its outer cylindrical surface a metallic ring 1 corrugated as shown in Fig. 2 so that axial pressure causes the ring to expand. To obtain a similar effect, but in the sense of contraction of the inner cylindrical surface, a ring 1, shaped as shown. in Fig. 4, is embedded adjacent the inner cylindrical surface of the non-metallic packing ring. The packing ring may be fitted with a metallic ring of each type to provide expansion and contraction. Alternatively, the rings may be mounted adjacent the packing ring.
Patent GB-1401083-A (GB)
Title: Acousto-optic filter apparatus
IPC: G02F1/11
Filed: 1972-07-21
Abstract: 1401083 Modulating light HEWLETTPACKARD CO 21 July 1972 [23 July 1971 10 April 1972] 34236/72 Heading H4F In a collinear acoustic-optic diffraction filter the sides of the photo-elastic birefringent crystal in which the acousto-optic interaction occurs are coated with acoustic and optical energy absorbing material to damp undesired acoustic resonances and stray light. As particularly described the coating is a single 0À5 mil. thick layer of low viscosity (100-500 cp.) acoustically lossy epoxy resin adhesive loaded in equal volume portions with tunsgten particles of 2 mils diameter or less (preferably in the micron range). The epoxy material has a low refractive index and couples stray light out of the crystal for absorption by the tungsten particles.
Patent GB-1122990-A (GB)
Title: Improvements in or relating to multiple part shearing head for dry shavers
IPC: B26B19/04
Filed: 1967-07-26
Abstract: 1,122,990. Dry shavers. V. KOBLER and W. KOBLER, [trading as KOBLER & CO.]. 26 July, 1967 [29 July, 1966], No. 34269/67. Heading B4B. In a multiple part shearing head for dry shavers comprising a plurality of elongate outer shearing elements 4 of U-shaped crosssection and associated elongate driven inner shearing elements 5 resiliently applied against the elements 4, the elements 4 are removably held side by side in grooves 2 of a base plate 1 by means of a U-shaped wire 6 the legs of which pass through bores I<SP>1</SP> in ribs 1 and through bores 4<SP>11</SP> in the legs 4<SP>1</SP> of the elements 4. The plate 1 may be an integral part of the shaver or be removably secured thereto by means of sliding pawls 16 engaging grooves 14 in bolts 13 carried by the plate 1, the pawls each being held by one end of a spring 18, or 18<SP>1</SP> the other end of which is secured to a pivotable cover flap 19 or 19<SP>1</SP>. Operatively connected to a driving motor by a lever arm 22 is a pivotally-mounted driver member 11 which carries three extensions 9 in spaced alignment corresponding to the distance between three recesses 7 provided in the plate 1. Driving sleeves 10 on the upper ends of the extensions 9 are urged by springs 8 into engagement with the recesses 7 to impart reciprocating motion to the inner shearing elements 5.
Patent GB-507486-A (GB)
Title: Improvements in photoelectrically controlled shutter mechanism for photographic cameras
IPC: G03B7/12
Filed: 1937-12-10
Abstract: 507,486. Photographic cameras with exposure meters. SCHMIDT, W., and DECKEL, F., (trading as DECKEL, PRAZISIONMECHANIK UND MASCHINENBAU, F.). Dec. 10, 1937, No. 34279. Convention date, Dec. 10, 1936. [Class 98 (i)] In a photographic camera in which the duration of exposure is controlled by a photoelectric cell, the cell operates to adjust in the path of a coupling a member whereby said coupling is disengaged when it reaches said adjusted member, the duration of the exposure being determined by the distance through which said coupling travels before it is disengaged. In the form shown, a photo-electric cell 21 is connected to a meter with moving coil 20 on a spindle 63 which also carries a drum 54 with pointer 56 moving over a scale 55. The exposure is initiated by depressing the button 30. The downward movement of the member 34 causes the pin 36 and the member -37 to be forced to the right by the surface 35. This rotates a crank 44 and a cam 45 which forces apart the ends 46, 47 of levers pivoted at 48, 49. Cheeks 52, 53 thus grip the drum 54. Simultaneously, a lever 41 pivoted at 40 is rotated anticlockwise and the link 60 pulled to the right, rotating a lever 62 about the spindle 63. This lever carries a spring-pressed slide 65 with a tooth 66 engaging a notch in a part pinion 64 journalled on the spindle 63. A rack 69 is thus moved to the left and an inclined surface 85 rocks a lever 78, 79 about its pivot 77, moving the link 82 to the right and opening the shutter (shown diagrammatically). During further movement, the shutter is held open by the straight portion of the rack engaging the end of the lever 78, 79. After a certain rotation of the lever 62, however, a pin 68 carried by the slide 65 engages a nose 57 on the drum 54. The tooth 66 is thus withdrawn from the notch in the pinion 64 and the rack 69 can return to its original position under the influence of a spring 75. The movement is retarded by a piston 71 moving in a cylinder 70 with a small orifice 73 (A valve 72 allows the piston to move freely to the left). Towards the end of this movement, the surface 85 passes the end of the lever 78, 79 and the shutter is allowed to close again. The setting of the meter and the drum 54 thus determines the length and duration of the return stroke of the rack 69. This in turn determines the duration of the exposure.
Patent GB-832331-A (GB)
Title: Threshing apparatus for a reaper-thresher
IPC: A01F12/20
Filed: 1958-10-27
Abstract: 832,331. Threshing machines. MASCHINENFABRIK FAHR A.G. Oct. 27, 1958 [Nov. 1, 1957], No. 34286/58. Class 6(3). In a threshing machine, the shaft 3 of the threshing drum is fitted with a series of hubs 4 which carry discs 6 on which the beater-bars 9 are mounted, the end walls 1, 2 of the threshing chamber having holes through which the shaft with its hubs can be introduced or withdrawn. The hubs are star-shaped and the end walls of the threshing chamber have slotted apertures 7 through which they can pass, the discs 6 having similar slots. The discs are bolted to the hubs while the drum structure is inside the threshing chamber.
Patent GB-507186-A (GB)
Title: Manufacture of symmetrical di-hydroxyalkylated amino-arsenobenzenes
IPC: C07F9/74
Filed: 1937-12-11
Abstract: 507,186. Organo-arsenic compounds. I. G. FARBENINDUSTRIE AKT.-GES. Dec. 11, 1937, No. 34374. Convention date, Dec. 19, 1936. [Class 2 (iii)] Symmetrical bis-dihydroxyalkylamino-arsenobenzenes are prepared by reducing the corresponding arsonic acids. The products possess enhanced therapeutic properties. According to the examples, 3 : 3<1>-di-(bis-dihydroxypropyl)- amino-4 : 4<1>-dihydroxyarsenobenzene is prepared by reducing 3-(bis-dihydroxypropyl)- amino - 4 - hydroxybenzene - 1 - arsonic acid (see Specification 447,773) with hypophosphorous acid; in a similar manner 3 : 3<1>- dihydroxy-4 : 4<1>-di-(bis-hydroxyethyl)-aminoarsenobenzene is obtained from 3-hydroxy-4- (bis - hydroxyethyl) - aminobenzene - 1- arsonic acid, 3 : 3<1> - bis - (dihydroxypropyl-hydroxyethyl) - amino - 4 : 4<1> - dihydroxyarseno - benzene from 3 - (dihydroxypropyl - hydroxyethyl) - amino - 4 - hydroxybenzene - 1 - arsonic' acid (see Specification 447,773), and 3 : 3<1>-di-(bisdihydroxypropyl) - amino - 4 : 4<1> dihydroxy - 5 : 5<1> - di - (acetylamino) - arsenobenzene from 3 - (bis - dihydroxypropyl) - amino - 4 - hydroxy - 5 - acetylaminobenzene-1-arsonic acid; in each case the arsonic acid is used as its hydrochloride and results in the formation of the arsenobenzene dihydrochloride from which the free base is obtained by neutralization with sodium carbonate and precipitation with ethyl alcohol. Specifications 226,686, [Class 2 (iii)], 484,594, and 494,249 also are referred to. Arsonic acide.-3-Hydroxy-4-(bis-hydroxyethyl)-aminobenzene - 1 - arsonic acid is prepared by reacting 3 - hydroxy - 4. aminobenzene - 1 - arsonic acid with 2 mols of ethylene oxide. 3 - (Bis - dihydroxypropyl) - amino - 4 - hydroxy - 5 - acetylaminobenzene - 1 - arsonic acid is obtained by nitrating 4-hydroxy-5-acetylaminobenzene-1-arsonie acid, reducing the nitro group and reacting the product with 2 mols of glycide.
Patent GB-1435151-A (GB)
Title: Asymmetric polyimide membranes
IPC: C08G73/10
Filed: 1973-07-19
Abstract: 1435151 Polyimide membranes E I DU PONT DE NEMOURS & CO 19 July 1973 [20 July 1972] 34397/73 Heading B5B [Also in Divisions B1 and C3] Microporous polyimide membranes, asymmetric in that they are composed of a thin relatively dense barrier layer on at least one surface and a less dense layer, are obtained from an aromatic polyamic acid solution. The solution in solvent A is formed into a membrane which is contacted with a cyclizing composition comprising a C 1 -C 6  aliphatic carboxylic anhydride and a tertiary amine with or without a solvent B. If the tertiary amine is a solvent for the polyamic acid then a solvent B which is miscible with A and a non-solvent for the polyamic acid is used. When the tertiary amine is a non-solvent for the polyamic acid then solvent B whether miscible with A or not or capable of dissolving the polyamic acid or not, need not be used. In the latter case the tertiary amine must be miscible with solvent A. The polyimides have the following formula and, depending on the choice of R and R<SP>1</SP>, they may be soluble in a common organic solvent or not. For insoluble membranes R is selected from the group comprising and E<SP>1</SP> from phenylene, tolylene, naphthylene, biphenylene, anthrylene, pyridinediyl and in which R<SP>7</SP> is oxygen sulphur or methylene. Other radicals disclosed for R are and where R<SP>2</SP> is C 1 -C 3  alkylene or haloalkylene, oxygen, sulphur, -SO 2 -, in which R<SP>3</SP> and R<SP>4</SP> are C 1 -C 6  alkyl or phenyl, and for R<SP>1</SP> where R<SP>2</SP> is as defined above. The membranes may be washed, for example in benzene followed by ethanol and then by water, and then air-or vacuum-dried. Example 86 illustrates the preparation of the membrane in the form of a porous fibre by extruding the polymeric acid into a bath of the cyclizing agent.
Patent GB-411441-A (GB)
Title: Improvements in or relating to apparatus for cutting food or for mixing foods whilst cutting them
IPC: B02C18/06
Filed: 1932-12-05
Abstract: 411,441. Guards for machinery. HOBART MANUFACTURING CO., Troy, Ohio, U.S.A.-(Assignees of Meeker, D. A.; Troy, and Slager, J. C. ; 56, E. Norman Avenue, Dayton, both in Ohio, U.S.A.) Dec. 5, 1932, No. 34423. Convention date, Dec. 15, 1931. [Class 80 (iv).] In a food-chopping machine of the kind having a rotary bowl and high speed cutters rotating therein the knife cover is retained in the closed position by a latch which is interconnected with the control switch of the motor in such manner that the cover cannot be unlatched until the motor switch is " off " and the switch cannot be closed when the cover is unlatched. The latch comprises a bolt 81 having a flattened laterally extending end which, when the bolt is depressed against the action of the spring 89, is projected through a slot in the flange 92 of an upstanding member 90 secured to the machine frame, and when the bolt is turned, engages beneath the flange 92 and locks the cover in the closed position. Depressing the bolt engages the flattened end with a slot in the upper end of a shaft 117, which is therefore turned as the bolt 81 is turned. The shaft 117 is bored axially to permit the escape of meat juices &c., and carries an arm 120 connected by a ball joint 122 with a longitudinally slidable bar 124, which is aligned, when the switch-operating arm and shaft 104, 105, is in the " off " position, with a transverse hole 129 in the enlargement 128. The cover can be unlatched only when the switch is " off,' and the passage of the rod 124 through the hole 129 is permitted. The switch can only be closed when the cover is closed, and the rod 124 withdrawn from the hole 129 by the act of locking the cover. The switch comprises fixed contacts 101 and pivoted blades 102 joined as a unit and connected to arms 107 on the shaft 105 by links 112 having lost motion slots 113 and a tension spring 114 which latter ensures a snap action when breaking the circuit.
Patent GB-1505929-A (GB)
Title: Flying shear including a control device for controlling a  shear-carriage of the shear
IPC: B23D36/00
Filed: 1975-08-20
Abstract: 1505929 Flying shears FIMI FABBRICA IMAANTI MACCHINE INDUSTRIALI SpA 20 Aug 1975 [24 March 1975] 34544/75 Heading B3W In a flying shear in which a shear carriage is accelerated to the strip feed speed, for a cut to be carried out, by the strip feed drive, the carriage drive transmission includes means, controlled by an electronic system, for giving a final accurate adjustment to the carriage speed from a presynchronization speed. A signal is given by a gauging stop (not shown) on the carriage 33 to initiate the acceleration when a desired cutting position on the strip is at a predetermined distance from the shear. The initial drive to the carriage is provided by a fluid piston 34 which also returns the carriage after a cut. A clutch 28 is engaged to transmit drive from the motor 11 driving feed rollers 10 to the carriage which is accelerated until a predetermined difference exists between the strip and carriage speeds. This difference is maintained by a differential 17 in the drive transmission which is controlled by an hydraulic servomotor 21 itself controlled by an electronic system until a predetermined short length remains before the cutting position. The differential 17 then stops with a controlled deceleration resulting in a controlled acceleration of the carriage to the strip feed speed.
Patent GB-367779-A (GB)
Title: Improvements in and relating to electric regulators
IPC: H02P9/26
Filed: 1930-11-17
Abstract: 367,779. Automatic regulation. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Byles, F. A.; 23, Van Antwerp Road, Schenectady, New York, U.S.A.) Nov. 17, 1930, No. 34618. Convention date, Nov. 16, 1929. [Class 38 (iv).] An automatic regulator comprises a source of photo-electric rays and a photo-electric cell, with vibratory means for varying the number of rays from the source incident upon the cell, and means, operating in accordance with the regulated condition, to vary the average number of the rays. The cell is adapted to alter the magnitude of the regulated condition. As shown in Fig. 1, for example, the voltage of a D.C. generator 1 is controlled by variation of the counter E.M.F. of a generator 5 in series with its excitation. The field of the machine 5 is variably excited through a thermionic amplifier 11 the grid voltage of which is determined by the degree of illumination of a photoelectric cell 19 which is in series with a resistance 20. The cell is associated with a light source 21 and fixed and movable shutters 26, 25 which control its illumination. The position of the latter is adjusted by a coil 17 subject to the output voltage of the generator to control the average illumination and a coil 32 subject to the excitation voltage produces a vibratory motion of the shutter 25. In a modification adapted to control the voltage of a three-phase alternator a movable shutter is subject to the output voltage and a vibratory shutter is subject to excitation voltage ; in this case the thermionic amplifier is in series with the exciter field winding.
Patent GB-1190763-A (GB)
Title: Improvements in or relating to Automatic Level Control Arrangements
Inventor: TRENDELL EDWARD GEORGE
IPC: H03G7/06
Filed: 1966-08-04
Abstract: 1,190,763. Companders. ELECTRIC & MUSICAL INDUSTRIES Ltd. 21 July, 1967 [4 Aug., 1966], No. 34900/66. Heading H4R. A circuit for smoothing the control voltage in an automatic level control circuit comprises two circuits having different discharge time constants, the circuit of longer time constant having a lower output amplitude, and a circuit for deriving the control voltage from the circuit producing the minimum output voltage. Fig. 1 shows a circuit, fed with the control signal at terminal 1, to charge up capacitors 3 and 7 via the respective diodes 2 and 6. The potential on capacitor 3, which has a relatively long discharge time constant, is applied via an attenuating potentiometer comprising resistors 4 and 5 to transistor 9, while the potential on capacitor 7, which has a shorter discharge time constant, is applied to transistor 10. Transistors 9 and 10 provide a circuit for selecting the minimum voltage which is fed out at terminal 13. Transistor 14 is arranged to discharge capacitor 3 to the same level as capacitor 7 whenever transistor 10 conducts, i.e. the output signal is derived from the short time constant circuit. Fig. 4 shows waveforms existing at the output of the long time constant circuit C, Fig. 4 (b) and the output of the short time constant circuit A when the waveform, Fig. 4 (a), is applied to the input of the circuit. Fig. 4 shows the output of the minimum selector circuit, D indicating the output with transistor 14 omitted, and D<SP>1</SP> with transistor 14 present. The arrangement provides smoothing, by the long time constant circuit, of small amplitude beats while giving fast decay after major level changes.
Patent GB-1353715-A (GB)
Title: Algebraic summing digital-to-analogue converter
IPC: G06J1/00
Filed: 1972-07-26
Abstract: 1353715 Digital to analogue converters WOODWARD GOVERNOR CO 26 July 1972 [30 Dec 1971] 35022/72 Heading G4H A digital to analogue converter either produces an output of instantaneous frequency proportional to the algebraic sum of several digital inputs or a pulse train output of average level proportional to a digital input. Twelve bit binary signals R, Z, Z<SP>1</SP> are applied to the respective input terminals C of selectors 200. The output D selects one of the inputs by a two bit number applied to terminals A and B and passes the signals to the stages of a 12 bit binary counter. An addressing device comprising two flip-flops 212, 214 is clocked by pulses on line 220 and provides four addresses (from its R terminals) to select one of the four inputs to selectors 200. The S output of flip-flop 214 (S2) gates clock pulses from source 180 to either the up or down input of counter 248 and is also connected to output 248. The counter has an output CRY when it is full and BRW when it is empty and these are used to clear and reenter inputs into the counter and to clock the addressing device. Positive input numbers are applied to lines R and Z and negative to Z<SP>1</SP> (and to T when used). In operation, with inputs as above and all T inputs at logic 1, R 1  and R 2 , the reset states of the address counter are both at 1. Number Z is entered into the counter and, as S 2  is at 0, clock pulses are supplied to the down input of the counter. When the count reaches zero, BRW output changes and provides an output which steps the address circuit and clears the counter. The new address enters R into the counter, the counter again counts down to zero and resets. The new address resulting in address circuit is that of inputs T. All ones are entered into the counter and, as S 2  is now at 1, a clock pulse is applied to the up input. Output CRY immediately operates and clears the counter and steps the address circuit, the process on this input taking so little time compared with the other inputs that it is effectively bypassed. At the last address, number Z<SP>1</SP> enters the counter which counts up until it is full and the process then recycles. The output taken from S 2  at point 248 is 0 during the count downs and 1 during the count ups and after detection of the leading edges of the pulses, the output is a pulse train of instantaneous period proportional to the algebraic sum of the input signals. When used as a digital to analogue converter, the input digital number is applied to both the Z and the Z<SP>1</SP> terminals and the output is taken at 249, from the R stage of flip-flop 214. The resulting output is 1 during the countdown and 0 during count up and is a pulse train of mean D.C. level proportional to the input signal.
Patent GB-1463748-A (GB)
Title: Electron beam apparatus
IPC: H01J37/153
Filed: 1974-08-08
Abstract: 1463748 Electron beam focusing system NIHON DENSHI KK 8 Aug 1974 [3 Sept 1973] 35097/74 Heading H1D Removal of spherical aberration from an electron beam, e.g. in a scanning electron microscope or X-ray probe analyser, is carried out by two or more sets of 4-pole elements plus three or more sets of 8-pole elements to remove residual aberration introduced by the 4-pole sets, together with axially symmetrical electron lenses at entry or exit to 16 elements or both; either electrostatic or magnetic elements may be used, if magnetic they may be wound on ferromagnetic or non-ferromagnetic cores. A pair of iron free solenoidal magnetic lenses 9, 10 at entry and exit provide focusing and keep the beam near the axis: either lens may be used alone (Figs. 5, 6, not shown). In the aberration correction system 8 four of eight non-ferromagnetic poles a-h carry double-wound bobbins, first windings on pole pairs a-b forming a 4 pole array and poles c-d forming a second array of opposite polarity, while four 8-pole arrays, a, b, c, d are formed from the second windings connected in alternating polarity. Focusing is preferably by lens 10, leaving entry lens 9 and the poles of system 8 at constant strength.
Patent GB-849939-A (GB)
Title: Improvements relating to rail-fastening means
IPC: E01B9/30
Filed: 1957-11-12
Abstract: 849,939. Securing railway rails. BRITISH TRANSPORT COMMISSION, and PROTOPAPADAKIS, P. Dec. 16, 1958 [Nov. 12, 1957], No. 35229/57. Class 104 (2). A railway fastener for securing flat bottomed rails to concrete sleepers comprises a hook shaped spring clip 1 having an upper portion 5 for engaging over a rail flange 6 and a shank portion 2 which is entered into an aperture 3 in the sleeper 4, is forced between two superimposed clip retaining members 9, 10 extending across the aperture 3 and is formed with a depression 8 for interengaging one of the members 9, 10. The lower end of the clip shank 2 is curved at 12 to facilitate the shank 2 passing behind a lever clip returning member 10 when the clip 1 is driven downwards. The portion 5 of the clip 1 normally bears on the rail flange adjacent the web but should the rail move upwards due to a load approaching, or leaving the underlying sleeper 4 the portion 5 of the clip 1 is caused to bear on the rail flange remote from the rail web. An electrical insulating pad 22 of hard rubber or vulcanised fibre may be placed under the portion 5 of the clip 1.