baber/WOPTO huggingface dataset:
Patent GB-1031145-A (GB)
Title: Improvements in or relating to audio-frequency amplifiers
IPC: H03F1/36
Filed: 1964-06-23
Abstract: 1,031,145. Loud-speaker circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. June 23, 1964 [June 26, 1963], No. 25896/64. Heading H4J. The diaphragm of a loud-speaker driven by a circuit arrangement including an amplifier is connected to a transducer which delivers a voltage corresponding to the acceleration of the diaphragm and this voltage is fed back degeneratively to the input of the circuit arrangement. Between the input of the circuit arrangement and the loud-speaker is a first network which emphasizes low audio-frequencies below the loud-speaker resonance frequency. In the negative feedback circuit between the transducer and the input of the circuit arrangement is a second network which attenuates high audio frequencies having a wavelength below half the perimeter of the loud-speaker. The transducer is preferably piezo-electric. The arrangement permits the diaphragm to move so that the sound pressure is proportional to the input signal over a given frequency band. The input signal at terminal 1 (Fig. 6) is amplified by a cascade amplifier 9, 10 and passes via first network I emphasizing low audio frequencies, to an amplifier 11 and loud-speaker 3. Sub -audio-frequency signals are reduced by a negative feedback path including a capacitor 31 and resistor 32. The loud-speaker 3 is provided with a piezoelectric transducer 4 and the output voltage from this is applied to the control electrode of a field effect transistor 20 which produces at its output 21 a voltage at a reduced impedance level. Transistor 20, together with resistors 22, 23, 24 are preferably incorporated in the loudspeaker 3. The transistor output voltage is applied to the second network II which integrates and thereby attenuates signals of wavelength below half the perimeter of the loud-speaker.
Patent GB-636171-A (GB)
Title: Improvements in electric actuators
IPC: B64C25/24
Filed: 1944-10-19
Abstract: 636,171. Electric actuators. MILES AIRCRAFT, Ltd., HUNT, C. L., and HAWKINS, A. S. Oct. 19, 1944, Nos. 25959/45 and 25960/45. Divided out of 627,005. [Class 78 (iii)] [Also in Group XXXVII] An electric actuator intended primarily for the operation of component parts of aircraft is provided with means for automatically discontinuing the drive to the output member after a predetermined travel thereof and with means for reversing the direction of travel of this member. These means are especially applicable to the actuator described in Specification 627,004. The hollow output member 5, Fig. 1, has a projection 36 which engages a limit switch 35 at each end of the stroke. These switches form the subject-matter of Specification 636,216, [Group XXXVII]. In a modification, Figs. 9 and 12, contacts 421, 431 are mounted on blades 44, 45 of which the former protrudes into the path of the projection 36. In a further modification, Fig. 8, a switch is shown which is interposed in the connections of the motor 2 so as to cause reversal when it is actuated. Spring blades 48, 481 each carrying a pair of contacts 49, 491 are mounted on an insulating rocker arm 47 which is moved to either position by a hinged strut 56 engaged by a slide 59. The blades are connected by hairpin springs 52 to terminals 53, 531 so that in one position of the switch contacts 50, 511 are connected to these terminals and in the other position contacts 51, 50<SP>1</SP> are connected thereto. The member 5 has helical grooves formed in its internal surface to receive a series of balls 8 which also engage in similar grooves 7 formed on a spindle 6. This spindle is connected to the motor 2 through epicyclic or other reduction gearing 3 and a solenoid actuated'clutch 11, 12 having dog teeth 13. Means is provided for preventing rotation of the member 5. Current passes through the windings of a solenoid 14 to maintain the part 11 in driving connection whether or not current is passing through the windings of the motor. The drive is disconnected when current fails by a spring 15. The tubular part 4 in which the member 5 moves is fitted with shock absorbers 22 for limiting the movement. The force exerted by the actuator is limited by a friction band 25 which surrounds the internally toothed annulus 24 of the gearing 3 and is adjusted by means 25<SP>1</SP> to slip under a predetermined load. The motor is provided with an electric brake 26, the windings of which are so interconnected with the motor windings that it is applied when the motor comes to rest and is released when it is started. The spindle 28, Fig. 4, of the motor armature carries a brake disc 29 which co-operates with a disc 30 slidably but non-rotatably mounted on the spindle and forming an armature of the solenoid 32. A spring 31 forces the discs into contact.
Patent GB-1318271-A (GB)
Title: Automatic pattern tracing systems
IPC: G06K11/02
Filed: 1970-05-29
Abstract: 1318271 Curve tracing apparatus IWATSU ELECTRIC CO Ltd 29 May 1970 [31 May 1969] 25971/70 Heading G4H [Also in Division G1] In automatic curve tracing apparatus for detecting a pattern on a drawing a series of closed path scanning operations are performed, the positions at which the curve is sensed by a detector being stored and utilized to determine the direction in which the detector and drawing should be relatively moved before the next scan. As described at each scan a light detector 21 (Fig. 7) is stepped in a square, the positions of the steps at which the edges of the curve are sensed (represented by transitions in the output of discriminator circuit 223 connected to the detector 21) being averaged in mean value detector 107 so that numbers representing the mid point of the intersected curve are stored in memories 108, 109, 110, 111. These are compared with the previous tracing direction to determine which value is nearest to the previous direction of trace so that the next direction of eight discrete possibilities is selected and motors driving the drum carrying the drawing and the detector are selectively energized. A tracing forbidding direction is also determined and stored. As described the detector is optical but other detectors may be used. The single detector may be replaced by several detectors arranged in a square and energized sequentially to perform the scan. Instead of a square scan, circular or other configurations may be used.
Patent GB-1478911-A (GB)
Title: Method of removing tread material from a pneumatic tzre
IPC: B23C5/08
Filed: 1974-06-12
Abstract: 1478911 Cutting tyres KENNAMETAL Inc 12 June 1974 [16 July 1973] 26004/74 Heading B4B A method of removing tread material from a pneumatic tyre prior to re-treading comprises the steps of rotating an inflated tyre about its axis of rotation and then moving a rotatable cutter 26 having a plurality of cutting elements 50, into contact with the periphery of the tyre to remove therefrom tread material in the form of chips. The apparatus comprises a motor M1 for rotating the tyre, a support 20, 22 for mounting the cutter 26 which is rotated by a motor M2, the support being pivotable about an axis 18 such that the cutter can traverse the surface of the tyre. The cutter 26 comprises a body 28 provided with inclined recesses 40 around its periphery. A cutting disc 50 is provided with a hole 52 for location on a pin 48 fixed in a support member 42, the member being clamped in its recesses by a wedge member 54. The wedge is drawn against the cutting disc by means of a double-ended screw having opposite hand threads. The cutting discs are positioned in their respective support members 42 such that the discs are alternately staggered around the periphery of the disc Fig. 5 (not shown). The cutting disc may be rotated about its pin 48 so as to bring a new portion of its cutting edge into the operative position when wear takes place. The discs may be made from cemented metal carbides, e.g. tungsten or titanium carbide or mixtures thereof.
Patent GB-804648-A (GB)
Title: Paper feeding device for a paper folding machine or like machines
IPC: B65H3/52
Filed: 1955-09-12
Abstract: 804,648. Feeding sheets. WIT, H. DE Sept. 12, 1955 [Sept. 11, 1954], No. 26005/55. Class 100(1) Apparatus for separating and forwarding sheets from a pile an a table 10 comprises a driving roller 2 disposed above a roughened eccentric member 5 mounted in the table, an intermediate roller 3 and a sheet-separator roller 4 mounted in a casing 9 surrounding the rollers and rotatable about the shaft 1 of the roller 2, the member 5 being mounted on a shaft 6 which can be turned to adjust the distance between the member 5 and roller 2 to the thickness of a single sheet. The sheets are placed between sid egauges 11, 12 and the casing 9 adjusted about the shaft 1 until the roller 4 rests on the top sheet. The roller 2 drives the roller 4 through the roller 3, and the shaft of the roller 3 is mounted in slots 13 in the casing 9. The apparatus is used for feeding single sheets to folding rollers which feed the sheets at a faster rate. In operation, when each sheet is gripped between the folding rollers its speed is increased and this increased speed is transmitted by the sheet to the roller 4. The speed of the intermediate rollr 3 is thus also increased, and the roller is therefore moved upwardly out of contact with the driving roller 2 until the sheet leaves the-roller 4.
Patent GB-497811-A (GB)
Title: Improvements in electric discharge lamps
IPC: H01J61/16
Filed: 1937-09-27
Abstract: 497,811. Discharge lamps. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen) Sept. 27, 1937. Nos. 26137 and 26261. [Class 39 (i)] A characteristic having a positive or only slightly negative portion is obtained in a cold electrode lamp with a filling mainly of neon at 4-8 mms. pressure by adding to the neon 0À2-0À9 per cent of krypton or xenon or a mixture of these gases. Low pressures of other gases, particularly mercury, may be present. The electrodes are both cold and consist of hollow cylinders of sheet iron. Dimensions and running data are given of lamps with fillings of mercury and 6 mms. neon and 0À5 per cent krypton or xenon, and 6 mms. neon and 0À2 per cent krypton or xenon without mercury. Luminescent material may be provided within the lamps and mercury may be contained in an electrode to be kept warm by the discharge. The lamps preferably work on D.C. with suitable precautions against electrophoresis ; on A.C. auxiliary starting devices are necessary. Specifications 363,343 and 476,240 are referred to.
Patent GB-713154-A (GB)
Title: Finned projectile
IPC: F42B10/14
Filed: 1952-10-17
Abstract: 713,154. Ammunition projectiles. ANSTALT FUR DIE ENTWICKLUNG VON ERFINDUNGEN UND GEWERBLICHEN ANWENDUNGEN ENERGA. Oct. 17, 1952 [Nov. 7, 1951], No. 26166/52. Class 9(1) A hollow charge projectile having a casing 1 housing an explosive charge 4 and closed by an ogival nose 2 carrying a fuze 3 is provided with an expanding tail unit 7. The base 6 of the projectile to which the tail unit is attached fits within a cartridge case 8 when the vanes are in their folded position, the overall diameter of the folded vanes being the same as the calibre of a driving band 14. Each vane is mounted on a transverse pivot 11 in a vane carrier 12 rigid  with the base 6, the folded vanes extending beyond the projectile over the greater part of their length. A fluid-tight packing 13 holds the projectile in the case 8. After firing the projectile, the vanes are expanded by the thrust of the propellant gases as the projectile leaves the gun. A sloping portion 15 of each vane engages the curved surface of the carrier 12 where it is locked by a spring-pressed bolt 17 carried by the vane 7, the bolt being forced into engagement with an opening 16 in the carrier 12. To reduce aerodynamic resistance each vane has a chamfered outer portion 18, and an inner surface 19 lying parallel to the projectile in the folded position. On each vane is a flatted surface 20 serving as a guide through the bore of the gun. Within the cartridge case 8 is a primer carrier 9 provided with flash holes 10.
Patent GB-259766-A (GB)
Title: Improvements in and connected with apparatus for teaching handwriting
IPC: G09B11/02
Filed: 1925-10-20
Abstract: 259,766. Hopper, B. J. Oct. 20, 1925. Finger-guides for facilitating writing a n d preventing cramp; guards; point-protectors.- A device for facilitating and teaching writing and preventing cramp consists of an arm d pivotally mounted on the writing-instrument a so that it may be closed to serve as a point-protector, or extended laterally to cause all the fingers to pass over and beyond it during writing. The arm may be pivoted directly on to the instrument or to an adjustable spring sleeve b, and the pivot is carried in forwardly-projecting lugs c. Alternatively, the lugs are stamped up from the material of the clip. The arm is of such a length that its outer end extends beyond the little finger, and preferably bears on the paper at a point slightly behind the writing- point. The end f of the arm is bent so that when in closed position it extends in front of the writing-point to serve as a protector, and the presence of the attachment also acts to prevent rolling. A knob or ball g is formed on the end of the arm to facilitate movement over the paper. The arm is arranged to work stiffly on its pivot so that it may be retained in any set position, and it is constructed so that it cannot be set at too great an angle from the instrument.
Patent GB-951108-A (GB)
Title: A-nor steroids
IPC: C12P33/00
Filed: 1960-07-27
Abstract: The invention comprises 11a -hydroxy-A-norprogesterone of the formula: <FORM:0951108/C2/1> and the preparation thereof by subjecting A-norprogesterone to the action of enzymes of the microoragnism Aspergillus nidulans in the presence of oxygen. A detailed example is given. Some 6b -hydroxy-A-norprogesterone is also formed in the above process and is separated. Specification 951,107 is referred to.
Patent GB-713303-A (GB)
Title: Improvements in or relating to jet propulsion engines and gas turbines
IPC: F02C7/266
Filed: 1952-10-20
Abstract: 713,303. Gas turbine and jet-propulsion plant. SMITSVONK, N. V. Oct. 20, 1952 [Nov. 30, 1951], No. 26219/52: Class 110(3 [Also in Group XXVII] In a jet propulsion engine or a gas turbine engine comprising a plurality of co-operating and/or interconnected combustion chambers together with a plurality of sparking plugs fed through a condenser system, the sparking plugs are of the surface discharge type electrically connected in series to the condenser system which is regularly discharged through said plugs. A switch 14 is operated manually or automatically to first connect a battery 13 with a solenoid 30 in order to open a valve 29 and permit a flow of fuel to the sparking plugs 2, the liquid channels of which can be adjusted by needle valves 24. After the opening of the valve 29 the battery is connected through an interrupter 15. 16, 17, 18 to a transformer 19, 20 which transmits impulses through rectifiers 21, 22, 23 to condensers 4, 5. When the condenser 5 has been charged to a given voltage it is discharged through a spark gap 9, a relay 8 and the sparking plugs to atomize the fuel fed thereto. The relay coil 8 attracts an armature 10 thereby closing contacts 11, 12 to discharge the condenser 4 and effect ignition of the atomized fuel. The combustion chambers 1 are inter-connected by a channel 35 to permit the flame to spread from one combustion chamber to the others. Reference has been directed by the Comptroller to Specification 671,794, [Group XXVII].
Patent GB-278393-A (GB)
Title: Control device for the brakes of a motor cycle
IPC: B62L3/04
Filed: 1927-10-04
Abstract: 278,393. Motosacoche-France Soc. Anon. pour l'Exploitation en France des Brevets Motosacoche. Oct. 4, 1926, [Convention date]. Brake mechanism.-A control or equalizing device for simultaneously-operated front and rear wheel brakes of a motor-cycle comprises a lever g mounted on a pivot k, which is itself carried by a pair of links l, so as to be capable of a pivotal movement about a shaft o rigid with the motorcycle frame, the lever g being connected by cable or rod transmissions a, b to the front and rear brakes, and the pivot being out of alignment with the points of connection to the transmissions a, b. The lever g may be actuated by a pedal i, or by a hand-lever on the handle-bar and a cable. The relative lengths of the arms e, f of the lever g may be varied. Stop lugs such as p enable one brake to be applied in the event. of the failure of the transmission mechanism of the other brake.
Patent GB-735986-A (GB)
Title: Method of making p-n junction devices
IPC: H01L29/36
Filed: 1953-09-23
Abstract: 735,986. Semi-conductor devices. RADIO CORPORATION OF AMERICA. Sept. 23, 1953 [Oct. 20, 1952], No. 26233/53. Class 37. A PN junction is produced in a metallic semi-conductor body by applying to the body an alloy of 2-15 atomic per cent of the same material as the body with a metallic impurity characteristic of the conductivity type opposite to that of the body, and alloying at least part of the alloy with the body. The alloy has a lower melting-point than the body. By using an alloy instead of the pure acceptor or donor impurity, the diffusion of impurity material into the body can be more accurately controlled. In one example, pellets are cut from a sheet of alloy consisting of 95 per cent indium and 5 per cent germanium and welded to opposite surfaces of a thin N-type germanium wafer. Heat treatment at 525 ‹ C. for 5 minutes in hydrogen or other reducing atmosphere causes the pellets to alloy and diffuse into the germanium wafer. Fig. 3 shows the germanium wafer 2 with flat and parallel PN junctions 16 and 18 separated by 0.001 inch. Etching treatment may be given to expose the surface portions of the PN junctions. The device shown in Fig. 3 constitutes a PNP transistor with emitter electrode 8 smaller than collector electrode 10, and the semiconductor body is encased in an envelope 30 of thermoplastic synthetic resin. Silicon may be used instead of germanium, and aluminium or gallium may be used in place of indium. The areas around the pellets may be masked during the heat treatment to prevent surface flow of the alloy. One or more P-N junctions may be provided.
Patent GB-1264007-A (GB)
Title: Film reel
Inventor: MCKEE EDWARD SHERMAN
IPC: G03B21/32
Filed: 1969-05-22
Abstract: 1,264,007. Film reels. EASTMAN KODAK CO. 22 May, 1969 [23 May, 1968], No. 26253/69. Heading B8M. [Also in Divisions G2-G3] Film reel 11 has a core 47 formed within hub 52 and having an axial bore 65 whose internal diameter is reduced intermediate the ends of the bore to provide a surface engaging spindle 25 so as to permit tilting of the reel about the spindle, the bore 65 having an axial key-way to engage a key on the spindle. Reel 11 may therefore tilt to take up the best position within cartridge 7 to give clearance between walls 17, 19 and the reel flanges. Spindle 25 comprises a sleeve 27 rotatably mounted on shaft 29 and driven by belt 30 and pulley 35, limited axial movement of the sleeve on shaft 29 being possible.
Patent GB-444184-A (GB)
Title: Improvements in dyeing leather
IPC: D06P3/32
Filed: 1934-09-13
Abstract: Acid wool and substantive dyes, dyeing with; dye preparations.--Level dyeings on leather with acid or substantive dyes are obtained by applying the dyestuffs in conjunction with substances of neutral or acid reaction exerting a buffer action at pH values of 7 to 3.2.  The dyeings so produced have an increased resistance to soap and alkalies.  Specified buffer substances are salts of weak bases, e.g. ammonium chloride, sulphate, formate or oxalate, magnesium sulphate or acetate, aluminium sulphate or acetate and salts of suitable polybasic acids, e.g. alkali metal phosphates, potassium acid phthalate, sodium or ammonium acid diglycollate, potassium acid adipinate and sodium or potassium acid saccharate.  The following examples are specified: (1) Full saturated level dyeings are obtained upon East Indian wet sheepskins by drumming them for 45 minutes in an aqueous liquor at 40 DEG  C. containing a mixture obtained by grinding together Metanil yellow extra and sodium acid diglycollate and specially level dyeings are obtained upon chrome-tanned leather by treatment for 30 minutes in a similar liquor at 60 DEG  C. followed by greasing and continuation of the treatment for a further 20 minutes.  (2) Chrome-tanned leather is dyed as in (1) with the use of a mixture obtained by grinding together Direct deep black E extra and ammonium sulphate; the dyeings are fast to the subsequent fat liquoring.  (3) Well-covered level dyeings are obtained upon neutralized chrome calfskins by drumming them for 30 minutes in an aqueous liquor at 60 DEG  C. containing Direct deep black E extra and potassium acid saccharate, thereafter adding formic acid and drumming for a further 30 minutes.
Patent GB-482442-A (GB)
Title: Improvements in or relating to money carrier for coins and/or folded bills
IPC: A45C1/00
Filed: 1936-09-29
Abstract: 482,442. Clips. VOSS, W. C. Sept. 29, 1936, No. 26393. Convention date, Oct. 12, 1935. [Class 44] [Also in Groups XVII and XV] A holder for coins 6, folded bills, &c., cornprises a spring 1, the coins, &c. being held between the convolutions of the spring. The ends of the spring carry end plates or discs 4 which may constitute finger grips by which the convolutions can be opened out to remove the coins. The turns of the spring are roughened and may be circular, triangular, square, &c. in cross-section and the spring may be plated or varnished or coated to protect it from perspiration. Advertising matter can be printed along the spring or on end plates forming closures at the ends of the spring and arranged parallel or at right-angles to the planes of the turns. These end closures may comprise two resilient discs adapted to clamp banknotes &c. between them. The holder may be in the shape of a cylinder, or a single or double cone, and it can be associated with a purse &c. The Specification as open to inspection under Sect. 91, comprises also that the holder may have the shape of a truncated cone, pyramid, or double-pyramid. This subject-matter does not appear in the Specification as accepted.
Patent GB-957428-A (GB)
Title: Expansion tank
IPC: F24D3/10
Filed: 1960-07-29
Abstract: 957,428. Pressure-relieving devices for fluids. C. H. KIRK. July 29, 1960 [Nov. 4, 1959], No. 26397/60. Heading F2V. [Also in Divisions E1, F1 and F4] An expansion tank for a hot water heating system is formed by welding, brazing or soldering together two cup-shaped cylindrical bodies 11, 13, the top cup having a skirt 12 for this purpose and having a flexible diaphragm 20 held within it by a ring 23 and also having a connection 24 for communication with the hot water system, while the bottom cup 13 has a valve or seal 25 for retaining gas at superatmospheric pressure in the space below the diaphragm 20 which is shown distended by the water above it. The diaphragm is formed with a bead on its inner surface, Fig. 3 (not shown), for coaction with the ring 23 and may be preformed to fit beneath the dome 8 of the cup as indicated in chain line. It may be large enough to engage the dome 8 and not be preformed, in which case the open bottom of the cup 11 is closed temporarily by a board with a central opening through which air is passed to stretch the diaphragm up into the dome. To create the gas pressure, solid carbon dioxide may be introduced through an orifice 18 in the lower cup before the seal 25 is located, or a charge of air may be introduced through a valve in place of the seal. In the distended position shown, the water volume (above the diaphragm) is said to be half that of the gas volume (below the diaphragm). U.S.A. Specification 2,695,753 is referred to.