baber/WOPTO huggingface dataset:
Patent GB-939927-A (GB)
Title: Improvements in polycarbonates
IPC: C08G64/10
Filed: 1960-07-18
Abstract: A block copolycarbonate consists essentially of blocks comprising recurring units of formula <FORM:0939927/IV(a)/1> and blocks consisting of recurring units of formula <FORM:0939927/IV(a)/2> where R is a phenyl group substituted in two positions with either fluorine or chlorine.  Preferably, the number of units in any block is 3-50 and the units of the former formula are present in about 60 to 85 mole per cent of the block copolymer.  The copolycarbonates may be made by first making two homopolymers by reacting phosgene with 2,2-bis-(4-hydroxyphenyl) propane or a bis-(4-hydroxyphenyl) methyl (dichloro- or difluoro-phenyl) methane in the presence of methylene chloride and aqueous caustic soda, then reacting the two homopolymers in the presence of tri-n-butylamine, next acidifying the reaction mixture with acetic acid to stop the copolymerization, and finally washing the resulting viscous dope and precipitating the copolymer from solution by pouring into methanol.  The copolymers may be made into films, e.g. by casting them from methylene chloride, which are useful in the manufacture of photographic film bases, packing materials, adhesive tape bases, kinescope recording tapes and condenser dielectrics.
Patent GB-209711-A (GB)
Title: Improvements in devices for coupling the connecting rod with the piston
IPC: F16J1/14
Filed: 1923-10-06
Abstract: 209,711. Soc. Anon. des Ateliers d'Aviation L. BrÚguet. Jan. 13, 1923, [Convention date]. Addition to 206,122. Void [Published under Sect. 91 of the Act]. Connecting-rods.-In a connecting-rod having the gudgeon pin d formed integral with it, as described in the parent Specification, the upper surface of the gudgeon pin bears on the piston throughout its length. A semicylindrical bush may be interposed between the gudgeon-pin and the piston.
Patent GB-296378-A (GB)
Title: Improvements in separable sliding clasp fasteners
IPC: A44B19/36
Filed: 1928-08-30
Abstract: 296,378. Winterhalter, M. Aug. 30, 1927, [Convention date]. Sliding clasp fastenings having stringers of identical fastening elements have a snap engagement between the stop members a and the sliding clasp d. In the form shown, the members a have studs c snapping into engagement with the slide.
Patent GB-187116-A (GB)
Title: Improvements in gravitational motors
IPC: F03G7/10
Filed: 1921-09-21
Abstract: 187,116. Rees, W. J. Sept. 21, 1921. Self-driving machines.-A self-driving gravity motor is operated by one or more pairs of weights .1 which are raised and allowed to fall by an equal number of pairs of balanced levers 19 which are locked in the limiting positions and released at fixed and equal periods during the cycle of operations. Levers 4 are oscillated by the rising and falling of the weights 1 and by means of connecting-rods 7, and cranks 6 drive a shaft 8 which transmits its motion to a set of wheels 9. Each wheel 9 is provided with a radial arm 12 which arms, by means of cords 14, bell crank levers 13, 17, and cords 18, operate the balanced levers 19. Each pair of levers 19 is connected by a cord 21 passing over a pulley 22. The locking and releasing means comprise a pivoted rod 25, mounted above the pivot 19<a> of the balanced lever 19, on the lower end of which rod is a roller 26 adapted to co-operate with a runway 27 in such a way that the roller is on one side or the other of the pivot 19<a> to lock the lever 19 in its upper or lower position. The rods 25 are operated from the shaft 8 by cranks 28 and connecting-rods 29.
Patent GB-534483-A (GB)
Title: Improvements in, or relating to projection and television screens
IPC: G03B21/60
Filed: 1939-08-31
Abstract: 534,483. Projection screens. STABLEFORD, J. L. Aug. 31, 1939, No. 25042. [Class 97 (i)] The surface of a screen formed from one or more sheets of a reflecting metal is provided with a large number of parallel narrow furrows, and is not grained ; the furrows may be produced by a rotating wire brush, and disperse the reflected light to an extent which is greater in a direction normal to them than in a direction parallel to them. The screen may comprise sheets of smooth aluminium, may be suspended in the manner described in Specification 502,153, and may be slotted as described in Specification 468,705. The furrows may be vertical or horizontal. If the furrows are vertical, and the projection beam is not normal to the screen, it is found that, in the vertical plane, the angle between the reflected light and the screen surface is different from that between the incident light and the screen surface, and the screen may be erected in the position in which the reflected light is directed more upwardly than it would be if the screen were turned through 180 degrees. The screen may be used, in conjunction with polarized light, and with analysers used by the spectators, for displaying stereoscopic images.
Patent GB-1167214-A (GB)
Title: Method and Apparatus for Conditioning a Space.
IPC: F24F3/147
Filed: 1967-05-31
Abstract: 1,167,214. Air heating and cooling apparatus. COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANIZATION. 31 May, 1967 [1 June, 1966; 2 Sept., 1966], No. 25044/67. Heading F4V. In air conditioning apparatus in which air is passed through a bed of particulate material of high thermal capacity, which may be crushed basalt, and heating and/or cooling means for the air is provided the particulate material is supported in a basket having an air-permeable floor. The embodiment shown in Fig. 5 comprises two enclosures 16, 17 each containing a bed 35, 40 the air from the room being exhausted through one bed while atmospheric air is supplied to the room via the other bed, this arrangement being reversed in a four-minute cycle. The cooling means comprises a further bed 33 (or 34) which is sprayed with water from jets 29 whereby the air passing from the room to atmosphere is evaporatively cooled and thereby cools the bed 35 (or 40) which in turn cools the incoming air to the room during the next cycle. The sprays may be thermostatically controlled to conserve water. A valve 39 controls the direction of air during the cycles. A burner 51 for natural gas is provided for winter heating. An air inlet 49 permits the introduction of makeup air from the atmosphere. Fans 47, 48 ensure circulation of the air. In another embodiment the apparatus is enclosed in a rectangular metal casing with air inlet and outlet connections at diagonally opposite corners and the casing is divided internally by a longitudinal vertical bulkhead including valves controlling the cycle. A timing device and electric motor operate the valve. This embodiment is suitable for installation as a "package-unit."
Patent GB-518433-A (GB)
Title: Improvements in and relating to noise limiting circuits for communication or control systems
IPC: H03G11/02
Filed: 1938-08-26
Abstract: 518,433. Wireless receiving systems. THORNTON. A. A. (Philco Radio & Television Corporation). Aug. 26, 1938, No. 25113. [Class 40 (v)] A noise-limiting circuit is so arranged that the amplitude of the noise pulse required to cut-off transmission is a function of the signal frequency. Reversely-connected diodes D1, D2 are in series in the path from the signal source E to utilization means 3. A constant-current bias is applied to the diodes by a degenerative pentode V1 so that for signal amplitudes above a desired value in either direction the current through one diode is reduced to zero and the signal transference is cut off. By making the resistances 11, 12 unequal, a cut-off characteristic which is unsymmetrical about the zero axis can be secured. If one diode is removed, then limitation occurs in one direction only. The cut-off level is reduced at higher signal frequencies by the network R1, C which increases the signal-current flowing through the diodes at these frequencies. Attenuation of the higher frequencies is prevented by the use of circuit R, L, which together with R1, C, forms a constant-resistance network. Any derived characteristic of cut-off amplitude against frequency may be obtained by using suitable frequency-selective networks. The limiter may be made to operate over a wide range of s.gnal strength by varying the constant-current bias on the diodes by A.V.C. potentials from 15 applied to the first grid of V1 at terminals 14.
Patent GB-664481-A (GB)
Title: Rotary card filing apparatus
IPC: A47B63/06
Filed: 1949-09-30
Abstract: 664,481. Filing papers. BELEW, L. W., and HERRING-HALL-MAWIN SAFE CO. Sept. 30, 1949, No. 25117/49. Class 146 (i). In a rotary card filing apparatus having a drum 14 mounted for rotation about a horizontal axis 13 and having radial side flanges 15 forming a peripheral channel 20 which is divided into pockets 20a by partitions 21, the partitions 21 are pivotally mounted adjacent the bottom 19 of the channel 20 and each partition has means engageable with the drum 14 for limiting the pivotal movement and resilient means are engageable with the limiting means adjacent the limits to yieldingly retard each pivotal movement. Each partition comprises two parts 21 with edge flanges to engage the card edges and hubs 22 mounted on pins 23 extending inwardly from the sides 15 of the drum and held against blocks 24 on the pins 23 by tubes 27, sliding on a pin 26, which are thrust apart by a spring 28. A headed pin 9 on each part 21 rides in an arcuate slot 30 in the side flanges 15 of the drum 14 and a spring metal buffer member 31 has its ends 32 adjacent the ends of the slot 30 to engage the pin 29 before it reaches the end of the slot. The drum 14 comprises outer discs 15 and smaller, inner discs 16 with flanges 17 to which a cylinder 19 is attached forming the bottom of the channel 20, the discs 16 being braced by cross-pieces 18. Arcuate strips 34 round the lower part of the drum prevent cards from'dropping out and have diverging ends 38 to force displaced cards inwardly. The drum 14 is supported by its axis 13 in bearings 12 mounted on the cross-stringers 5 of a frame 1 which fits into a casing 60 with a top opening 63 and which has angle irons 64 to rest on angles 8 on the frame 1 and which may be secured thereto by screws 65. The casing 60 is closed by an arcuate door 67 having segmental depending side portions 68 which lie outside the frame 1 and are journalled by bearings 69 on the drum shaft 13 and the door is maintained in open or closed position by an arm 74 weighted at 75 to counterbalance the door, stop means such as resilient blocks 77, 78 being provided to limit the swing to the two positions. The door 67 has a key operated lock 70 in which a plunger 71 enters an aperture in a channel member on the frame 1, the upper face 11 of which lies in the opening of the casing 60, the lock 70 having a lateral extension 73 which overlies the casing 60 to prevent it being lifted off when the file is locked. The rotation of the drum 14 is effected through a chain 42 and sprockets 41, 43 by an electric motor 39 coupled through a speed reducing transmission unit 40, the motor being wired for reversing and operated by an actuator 59 extending through a slot in the upper flange 11 of the member 10 and which is rocked to contact either switch 46 or 54 to start the motor 39 in the same direction as the actuator is moved.
Patent GB-664887-A (GB)
Title: Improvements in or relating to flower holders
IPC: A45F5/08
Filed: 1949-09-30
Abstract: 664,887. Flower holders. DUDLEY, G. A. June 22, 1950 [Sept. 30, 1949], No. 25239/49. Class 43. A flower holder having means for securing it to a garment comprises a reservoir 12 from which a narrow neck 13 extends, the rear part of a flange 14 at the top of the neck being extended upwardly and the front part forwardly so that the flowers are supported in an upward and forward position. The holder shown in Fig. 1 comprises two transparent plastic mouldings which are secured together by adhesive and may be tinted, one comprising the neck 13 and the front of a heart-shaped reservoir 12, the other comprising the rear of the reservoir ; a pin 19 is attached by heating two projections at the rear of the neck 13 and squeezing them over the upper part of the pin. In a modification a glass holder is formed with a spherical or an inverted-pearshaped reservoir, one end of a wire pin being wound round the neck. Alternatively the holder may be made of rubber or other waterproof material. -In a further modification, Fig. 9, the short neck 29 of a glass reservoir 28 has fitted over it the neck of a flexible top part 27, the flange of which is pushed through a lapel buttonhole from the rear. The part 27 is preferably made of rubber, but may be of a transparent flexible material e.g. polyvinyl chloride or polyethylene. According to the Provisional Specification the holder may be attached by a clip.
Patent GB-1534197-A (GB)
Title: Switching device for a preferably pneumatic tubular conveying system
IPC: B65G53/56
Filed: 1976-06-18
Abstract: 1534197 Tube switches for pneumatic conveyers TEMAFA TEXTILMASCHINENFABRIK MEISSNER MORGNER & CO GmbH 18 June 1976 [16 July 1975] 25250/76 Heading B8A An oblique end 3 of a tube 1 is swivelled so that the tube connects with either a tube 2 or a tube 4. The other end of the tube 1 having a seal 6 having a reduced-thickness portion carrying a bead 12 which curves inwardly and seals with the end of tube 2 or 4.
Patent GB-651372-A (GB)
Title: Improved method of coupling pipes and in means therefor
IPC: F16L37/14
Filed: 1948-09-28
Abstract: 651,372. Pipe couplings. REILLY, C. Sept. 28, 1948, No. 25252. [Class 99(i)] [Also in Group XXII] Pipes 1 are coupled by threading on to each pipe two rigid rings 6, 8 and an intermediate resilient ring 7, deforming the end of the pipe (see Group XXII), by bending portions thereof outwardly to retain the inner rigid rings thereon and then fitting a muff 3 over both pipes and applying means such as a staple 9 to retain the outer rigid rings within the muff. The legs of each staple 9 pass through holes 11, 12 in the muff and may be curved to grip the pipe. In a modification, Fig. IV (not shown), the staple and outer ring 8 are replaced by a threaded cap, and in a further modification, Fig. IV (not shown), the muff has intermediate connections welded to it.
Patent GB-462725-A (GB)
Title: Improvements in or relating to electrical resistances
IPC: H01C10/10
Filed: 1935-09-11
Abstract: 462,725. Electric signalling systems. COSSOR, Ltd., A. C., and POSTLETHWAITE, F. Sept. 11, 1935, No. 25273. [Class 40 (i)] [Also in Group XXXVI] Apparatus for electrically indicating variable pressures in conjunction with an oscillograph comprises a carbon composition resistance element the internal resistance of which varies with pressure. The element 4 may be housed in a steel body 1 made to screw into a vessel the pressure in which is to be determined. Pressure is transmitted through a thin flexible wall 1b, a steel cap 7, and insulation end plates 6. The pressure does not affect the resistance of the terminals. Connecting leads 4a are led through a plate 2, and a cooling fluid is circulated through bores 3a, 2b, 2c. The leads 4a are connected to the deflecting plates of a cathode ray oscillograph through an amplifier and, in the case of engine indicator diagrams, the time base circuit of the oscillograph is connected with the piston displacement or crank angle. Alternatively the resistance element may be suspended inside the vessel or a conduit through which fluid flows. Specifications 430,943 and 430,974 are referred to.
Patent GB-1015122-A (GB)
Title: Improvements in or relating to low-inductive capacitor banks, and protection means therefor
IPC: H01J17/14
Filed: 1962-07-02
Abstract: 1,015,122. Charging and discharging capacitors. KERNFORSCHUNGSANLAGE JULICH DES LANDES NORDRHEIN-WESTFALEN. July 2, 1962 [July 1, 1961], No. 25292/62. Heading H2H. A system for producing a powerful magnetic field in a load 3 such as is described and claimed in copending Specification 1,015,123 is characterized in that each of the elements 2 comprise a plurality. of triggered spark gaps. In a further embodiment shown in Fig. 2 the individual units may be interconnected by means of inductors 8.
Patent GB-817036-A (GB)
Title: Improvements in or relating to aircraft steering mechanism
IPC: B64C25/50
Filed: 1956-08-20
Abstract: 817,036. Vehicle power steering. CLEVELAND PNEUMATIC. TOOL CO. Aug. 20, 1956 [March 21, 1956], No. 25366/56. Class 79(5) [Also in Group XXIV] A device for steering an aircraft landing wheel comprises two members 10, 11 rotatable about a common axis 12, an eccentric 17, 22 mounted on each member, the eccentric axes 32, 34 being equally spaced from the axis 12, a collar 31, 33 rotatably mounted on each eccentric, the collars 31, 33 being connected together by a pivot pin 44 on which forces can be exerted radially of the axis 12 to cause relative rotation between the two members 10, 11. As shown the aircraft undercarriage comprises an upper telescoping member 10 secured to the airframe and a lower telescoping member 11 carrying ground wheels (not shown). The eccentric 17 is keyed to the member 10 and the eccentric 22 is journalled on a bearing 21 secured to the member 10. the eccentric 22 being connected by torque arms 16 to the member 11. Portions 46, 47 on the collars 31, 33 carry the pin 44 to which is pivoted a rod 39 carrying within a cylinder 36 piston 41, the cylinder 36 being integral with a. member 19 rotatably mounted on the member 10. Cylinder spaces 42, 43 are connected by passages 51, 52 to annular grooves 48, 49 on the upper face of the member 19. Registering with the grooves. 48, 49 are bores 54, 56 in the eccentric 17, the bores being connected by hoses. 57, 58 to a valve (not shown) in turn connected to a fluid pressure source and a reservoir return whereby the cylinder spaces 42, 43 can be alternatively pressurized and exhausted to move the piston 41 in the cylinder 36. In operation, if for example, the space 42 is pressurized and the space 43 exhausted, the piston 41 moves to the right thus tensioning the rod 39 whereby the collar 31 and the member 19 are moved in an anticlockwise direction until the pin 44 is in the plane containing the axes 12, 32 with the axis 12 between the pin 44 and axis 32. Furthermore such movement of the piston 41 causes counterclockwise rotation of the eccentric 22 relative to the member 19 until the pin 44 and axes 12, 34 are in a common plane with the axis 12 between the pin 44 and axis 34. Thus for movement of the piston 41 half its stroke the arms 16 are moved through 180 degrees relative to the member 10, and for full stroke movement of the piston the arms 16 rotated through a complete revolution.
Patent GB-791495-A (GB)
Title: Improvements in or relating to cathodes of the dispenser type
IPC: H01J1/28
Filed: 1956-08-20
Abstract: 791,495. Cathode materials and constructions. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 20, 1956 [Aug. 23, 1955], No. 26371/56. Class 39(1). A dispenser cathode comprising a porous body of refractory metal in contact with alkalineearth metal compound has its electron-emissive surface bounded by non-porous zirconium. In the Fig. 11 is a porous tungsten member impregnated with fused barium aluminate, having a central projecting portion 14. This is surrounded by a solid ring 15 of pure zirconium rigidly secured to the member, as by spot-welding. The edge of the molybdenum container 10 is flanged over the ring, whose upper surface is coplanar with the surface 12 of projection 14. Emission is thus restricted to the central part 14, which may be much reduced in diameter so that it is almost a point source, Fig. 3 (not shown). In Fig. 2 (not shown), the central portion of the porous body is blocked off by a zirconium disc, so that a hollow cylindrical electron beam is produced.
Patent GB-1014727-A (GB)
Title: Analogue to digital transducers
IPC: H03M1/00
Filed: 1963-06-26
Abstract: 1,014,727. Selective signalling systems. HEWLETT-PACKARD CO. June 26, 1963 [July 23, 1963], No. 25454/63. Heading G4H. In an analogue-to-digital converter, the input signal is applied to a comparator 9, the other input of which is from a digital-to-analogue converter 33 controlled by a counter 25, and the difference output of comparator 9 is applied to a voltage-to-frequency converter 17. When the input signal is first applied, the resulting large error signal from comparator 9 is detected and the sensitivity of converter 17 is reduced by a control circuit 15. The pulse train from converter 17 is passed to the third decade stage of counter 25 over a predetermined period by gates 19, 27. The reduced error voltage from comparator 9 enables the full sensitivity of converter 17 to be employed thereafter, and in each measurement cycle pulses are passed through gates 19, 21 to the lowest decade stage of counter 25, these stages being reset at the end of each cycle. A digital display from all five decades of counter 25 may be given. The converter may also include an attenuator 11 which is adjustable in accordance with the error voltage.
Patent GB-858425-A (GB)
Title: Improvements in or relating to a test-stand-brake for testing torque of engines
Inventor: DIESFELD FRANZ
IPC: G01L3/22
Filed: 1957-08-13
Abstract: 858,425. Measuring torque electrically. SAUER & SOHN G.m.b.H., J. P., [formerly SAUER & SOHN A.G., J. P.]. Aug. 13, 1957 [Aug. 13, 1956], No. 25489/57. Class 40 (1). [Also in Group XIX] In a torquemeter of the kind in which a rotor is driven by the motor under test and the torque is magnetically transmitted to a stator which is thereby angularly displaced by an amount proportional to the torque, the stator is floatingly mounted and its angular displacement is measured by means of resistance strain gauges. Construction.-To each end of a cylindrical stator is connected a plate 5, Fig. 3, comprising two lugs which embrace bolts 6, the heads of which rest on diaphragms 4 supported by the liquid cushions 3 of hydraulic cylinders 2, a pipe 9 providing communication between the liquid cushions 3 of the two cylinders bearing each plate. Angular displacement of the stator 8, Fig. 2, is transmitted to one or, as shown, two pairs of members 10a, 10b joined by a bowshaped arm 16, via a forked member 18 secured to the stator which engages a protrusion 17 on the arm 16. The members 10a, 10b carry resistance strain gauges 19a, 19b (Fig. 4) respectively, and are held in tension by nuts 14 and springs 15 within a sleeve 11 which is secured in position by bolts 12 in supports 13 or in the base 1. The change in length of the members 10a, 10b, due to torque is of the order of 0.0005. Measuring circuit, Fig. 4.-Each resistance strain gauge 19a, 19b or, where two pairs are used, each series-connected set of corresponding strain gauges is connected in parallel across one arm of a bridge comprising four variable capacitors 20a, 20b, 21a, 21b and energized by an oscillator 26 through a transformer 27. The value of the unbalance signal, which is amplified and fed to a band-pass filter and a ring modulator at 25, is indicated on an instrument 22.
Patent GB-659703-A (GB)
Title: Improvements in and relating to contacts for holders for thermionic valves, plugs orlike electrical devices having projecting prongs
IPC: H01R33/76
Filed: 1949-10-04
Abstract: 659,703. Two-part couplings; holders for discharge tubes. CINCH MANUFACTURING CORPORATION. Oct. 4, 1949, No. 25511. Convention date, Oct. 5, 1948. [Class 38 (i)] A socket contact has obstructing means to limitt he distance a pin of a valve, plug or the like may be inserted. The contact comprises a split, tubular, pinreceiving portion 28 and a tongue portion 30 and has a shoulder 32 formed between the tongue and portion 28 having an aperture 36, the edge 38 of which forms an abutment for the end of a pin 27. The socket is shown mounted in an aperture 14 in a valve-holder 12, with the tongue portion extending through a slot 24 at the base of the aperture and a lug 42 on the tongue engaging the underside of the holder to retain the socket therein. In a modification, an upstanding lug on the shoulder forms the abutment for the end of the pin.