baber/WOPTO huggingface dataset:
Patent GB-475446-A (GB)
Title: Improvements in or relating to electric impedance networks
IPC: H03G7/00
Filed: 1936-09-30
Abstract: 475,446. Automatic volume control. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Sept. 30, 1936, No. 26562. Convention date, Sept. 30, 1935. [Class 40 (iv)] [Also in Group XL] An amplitude filter employing dry-plate rectifiers or other non-linear resistances can be used for suppressing needle scratch or expanding or contracting volume-range, and may have a characteristic dependent on frequency. A ladder network, Fig. 1, for eliminating large amplitudes may have series arms comprising ohmic resistances R1 ... R4 and shunt arms comprising pairs of oppositely connected rectifiers, the ohmic resistances being equal to that value of the non-linear resistances at which the voltage characteristic of the latter has its greatest curvature. The output voltage e0 (ordinate) is shown against the input voltages e1.. e4 (abscissµ) in Fig. 3; when a sufficient number of sections is used the characteristic is flat with a sharp cut-off, as in the case of e4. When the pairs of rectifiers are in the series arms and the resistances in the shunt arms, Fig. 4 (not shown), the characteristics are concave upwards as shown in Fig. 5. Such a circuit may be used for suppressing background noises in a telephone receiver. In a phonographic recorder, needle scratch may be suppressed by an amplitude-filter of this kind, and the distortion introduced by the filter may be subsequently eliminated by reproducing through a network of the converse kind. Instead of resistances R1 .. R4, acceptor circuits, Fig. 7a, or rejector circuits, Fig. 7b (not shown), may be used. The tuned circuits may form the shunt arms and the pairs of rectifiers the series arms, Figs. 8a, 8b (not shown), or each arm may comprise rectifiers in series with complex impedances, Fig. 6 (not shown). The Specification as open to inspection imder Sect. 91 comprises also ladder networks having single rectifiers in the series arms and condensers or other impedances in the shunt arms. This subject-matter does not appear in the Specification as accepted.
Patent GB-1153617-A (GB)
Title: Improvements in or relating to Sheet Feeding Apparatus
Inventor: GATES ALBERT GEORGE RONALD
IPC: B65H7/04
Filed: 1966-06-15
Abstract: 1,153,617. Sheet-feeding; tripping. GESTETNER Ltd. 12 June, 1967 [15 June, 1966], No. 26719/66. Heading B6C. A detector for paper sheets and equipment control device, especially for the pressure roller of a stencil duplicator, comprises a guide for sheets fed to the equipment, an actuating member which is engaged by a sheet being fed to operate a valve, and pneumatic operating means for the equipment controlled by the actuation of the valve. Fig. 1, illustrates such a device in which the main drive shaft 32 for the printing cylinder of a stencil duplicator carries a cam 6; the cam follower is a roller 15 carried on a pivoted lever 16 which engages a boss 33 on a master piston 4 slidable in a master cylinder 5 against the action of return spring 17. At each cycle of the duplicator, piston 4 is depressed building up pressure in side chamber 20 until the spring 17 returns the piston, the cylinder being vented through apertures 18, 19. When no sheet is fed, detecting finger 1 is in its Fig. 1 position resting against paper frame 2, the arrangement being such that air is vented from chamber 20 through conduit 23 and out of a bore (34) Fig. 2 (not shown), in valve body 24 and sleeve 25, whenever piston 4 is depressed; there is no pressure build-up in second conduit 26 which is also connected to side chamber 20. If a sheet is fed, then detecting finger 1 is rotated (Figs. 2, 4, not shown) closing the cross-bore (34) in valve 24. Pressure then builds up in conduit 26 when the piston 4 is depressed, forcing control lever 8 to rotate about pivot 9 under the action of a further piston 7 in a slave cylinder. A further cam (14) mounted on drive shaft 32 (Fig. 5, not shown), oscillates a two-arm lever (13) which carries a fixed peg 12; in one direction of oscillation, the peg 12 engages arm 31 of control lever 8 and moves it laterally; the pressure roller (36) which is mounted on lever 8, is thus forced against the printing cylinder (38) (Figs. 3, 4, 5, not shown), whereon when no sheet is fed, the peg 12 slides into the recess between arms 30 and 31 of the control lever and causes no movement thereof (Fig. 1). Specification 973,108, in which the detector prevents actuation of the pressure roller only when no sheet is fed, is referred to.
Patent GB-482663-A (GB)
Title: Improvements relating to machinery guards
IPC: F16P3/04
Filed: 1936-10-02
Abstract: 482,663. Machinery guards. LUCAS, Ltd., J., and REID, W. F. Oct. 2, 1936, No. 26749. [Class 80 (iv)] A machine cannot be started if the guard is not in its service position, and, the guard cannot be moved out of such position if the control means is in the driving position. As applied to a hydraulic press with movable ram a and fixed head b, the invention comprises a guard c slidable in guides d, the service position being the lower. The guard has a pin-andslot connection with a balanced lever e pivoted to a shaft h, a second lever i on which is connected by a link to one limb of a bell-crank lever the opposite limb of which is pivoted to fixed spaced arcuate members l between which moves the control lever o connected by linkage u, v, to the control valves in a casing w. This lever also moves between parallel portions of a link m connected to the bell-crank k, a lost-motion connection in the nature of a pin r being provided between the lever and link. A pawl t integral with the lever o is adapted to coact with a cam n on the bell-crank k, the cam surface being a circular arc struck from the pivot x of the lever o. With this lever in mid-position, both the admission and exhaust valves are closed and the guard is in the obstructive position. On moving the lever counterclockwise, the exhaust valve is opened and the guard is raised by the link m. Taking this as the normal position with the machine at rest, movement of the lever clockwise to midposition lowers the guard, which may descend by gravity or be assisted by the pawl t acting on the cam n. If the guard be obstructed, the cam n prevents further movement of the pawl t and lever o and therefore the starting of the machine, but if it be unobstructed, the lever o may be moved to open the admission valve, the pawl sliding over the concentric cam surface n. Owing to contact of cam and pawl, the guard cannot be raised while the admission valve is open. The return of the lever o to its mid-position is effected independently of the guard c which is held by the action of the pawl on the cam. The lever may be locked in any of its three positions by a bolt p. In a modification, the bell-crank lever, cam and pawl are located at the top of the machine adjacent the guard lever e, and the link which actuates the bell-crank lever is connected to an arm on the valve spindle actuated directly by the lever o. The cam is formed on or combined with the lever which transmits movement from the bell-crank lever to the guard, and the pawl is formed on the bell-crank lever. Specification 125,866, [Class 80 (iv)], is referred to.
Patent GB-280693-A (GB)
Title: Improvements relating to the synchronizing of alternating-current machines
IPC: H02J3/42
Filed: 1926-10-26
Abstract: 280,693. British Thomson-Houston Co., Ltd., Parry, R. D., Petch, H. S., and Humphreys, C. F. Oct. 26, 1926. Synchronizing dynamo-electric machines. - A phase meter, Fig. 1, of the Lincoln type for example, automatically controls the speed of the incoming machine 29 according to its frequency difference from that of the bus-bars 25 and a voltage balance relay 40 automatically controls its voltage. Relays 33 - - 37 controlling an auxiliary circuit for closing the parallelling switch 30 may also be provided. These are controlled by the aforesaid apparatus and by the phase indicating pointer 15 and frequency-difference contact 16 of the phase meter so that the switch can only close in correct conditions of synchronism. The speed and voltage control are effected by split-field motors 44, 45, the circuits of which include " gust " relays 49 having time-lag devices ensuring a time interval between successive operations during which the controls may become effective.
Patent GB-963382-A (GB)
Title: Improvements in and relating to self-propelling liquid textile sizing compositions
Inventor: KATZBECK WALTER JOSEPH
IPC: D06M23/06
Filed: 1962-07-12
Abstract: A self-propelling aqueous size composition comprises 1-10% of size and 0.001-1.0% of a phosphatide, e.g. lecithin or cephalin. The size may be oxidised, acid-modified, or gelatinised starch, hydroxyethyl starch, carboxymethyl cellulose, or an acrylate.  The propellent may be difluro-dichloromethane.  Other ingredients may be borax, sodium hydroxide, silicate, tripolyphosphate, and/or the phenyl phenate, polyethylene glycol, and dimethyl silicone.
Patent GB-1348038-A (GB)
Title: Wedge for use in a wedge connection
IPC: E04F11/18
Filed: 1971-04-19
Abstract: 1348038 Sockets for posts LOOVEVERKEN RAUFOSS AB 19 April 1971 [23 April 1970] 26880/71 Heading E1B [Also in Division F2]  A wedge 16, 17, 20 for securing a post 5 into a socket 4 for such applications as balconys, railings, banisters and bridge railings &c has on one wedge surface thereof alternating projections 21 and recesses 22, the projections 21 being arranged to be pressed into said recesses 22 through flexible or permanent deformation thereof during the insertion of the wedge such that when the deformable projections have been completely formed into the recesses the force which has to be applied to cause further continued insertion of the wedge will rise rapidly thereby readily indicating that the wedge has been driven in sufficiently far to establish the required rigidity of the wedge connection. As shown two such wedges 16, 17 are used in combination with wedge shaped inserts 18, 19 to secure the post 5 into the socket 4 which is releasably fastened at.6 to a hole 7 of a 'U' shaped anchorage element 2, 3 cast into a concrete floor 8.
Patent GB-446725-A (GB)
Title: Improvements in or relating to hair cutting machine for removing hairs from cavities
IPC: B26B19/14
Filed: 1935-09-28
Abstract: 446,725. Hair clippers. MARHOLT, K., 7, Garni.songasse, Vienna. Sept. 28, 1935, No. 26882. Convention date, Feb. 5. [Class 131] A cutting - machine for use in removing hair from cavities such as the nostrils or ears comprises concentric tubes 1, 2 provided at one end with coacting teeth 3, 4, and a pair of operating levers 8 each pivotally mounted at one end 7 on the outer tube 1 and provided at the other end with a slot 10 engaging a pin 6 projecting from an enlargement 14 at the bottom of the inner tube 2. The levers 8 are pressed outward by a spring 11, and the tubes 1, 2 are located relatively to one another in the longitudinal direction by a screw 12 passing through the outer tube 1 and engaging a slot 13 on the outer wall of the inner tube. When the levers 8 are pressed together and released, the tubes 1, 2 are given a rotary reciprocating movement. The levers 8 may be provided with holes or the like for engaging the fingers, in which case the spring 11 may be dispensed with, and the pin-and-slot connection between the levers 8 and the tube 2 may be replaced by a rack-and-pinion. The bore of the tube 2 is unobstructed and may be readily cleansed by a stream of air, water or alcohol.
Patent GB-1155564-A (GB)
Title: Transportable Container for Flowable Material
Inventor: HAWKINS MERVYN ROY
IPC: B65D77/06
Filed: 1965-06-24
Abstract: 1,155,564. Load handling pallets; lined container. ASHTON CONTAINERS Ltd. 22 June, 1966 [24 June, 1965], No. 26895/65. Headings B8H and B8P. A container 1 for flowable material mounted on (preferably glued to) a conventional opendecked pallet 2 comprises a collapsible outer cardboard or like tubular body 3, having vertical rectangular panels, a top 4 and an octagonal bottom 5 and a length of lay-flat tube of polyethylene or other flexible material formed into a separate lining 6. The lower end of the lining 6 is folded to form a diametrical closure 7. The body 3 is collapsible and comprises eight panels. Items 3, 4, 5 are separately fabricated and fastened together (as by staples) at the place where the container is filled. The bottom 5 is constructed from two pieces 9, 10 of material which overlap with lightly secured flaps 11, 12. The upper end of the lining 6 is turned over the upper edge of the body 3 and secured by adhesive at 15. At its destination the filled container 1 is emptied by being placed over a hopper, the flaps 11, 12 bent down and the end portion 16 of the lining 6 pulled through the opening 13. If necessary the lining 6 can be slit for emptying. In an alternative form of the container it may be discharged from one of its lower edges by lifting a flap 20, Fig. 8, and slitting the lining 6. A modified form of the body 3 is discontinuous at the top edge of each panel 18, Fig. 11, having a hinged flap 34 with a medial transverse line of weakening whereby the flap can be collapsed inwardly and doubled back on itself allowing the top edge portion to collapse under pressure when, due to movement, the material settles, thus allowing stacking of a second container on top of a first. The bottom is formed from an octagonal panel (22), Fig. 5 (not shown), each side of which has a flap 23 bent at right angles to the panel (22) and held in position by adhesive tape 24. The top is similarly made but has a central filling aperture provided with a rectangular cover 28. With very light loads the pallet 2 can be dispensed with or incorporated in the bottom of the container by providing a number of short legs or blocks glued to and projecting downwards from the bottom.
Patent GB-971861-A (GB)
Title: Electrical bushing
IPC: H01B17/36
Filed: 1963-07-08
Abstract: 971,861. Insulating bushings. BROWN, BOVERI & CO. Ltd. July 8, 1963 [July 10, 1962; Dec. 20, 1962], No. 26971/63. Heading H2C. The bushing for the lead in conductor of a gas-pressure circuit breaker consists of a tension tube 5 which surrounds the conductor 1, surrounded by insulating tube 2, between which tube and the housing of the circuit breaker 4, a seal is maintained by means of nut 8 being tightened and the compressive forces being transmitted to end-cap 9, disc 10, and disc springs 11, to the flange 12, which surrounds sleeve 6, and which is capable of axial movement with respect to said sleeve. Tensile forces produced by the expansion of conductor 1 with temperature changes are transmitted to tension tube 5 by means of strut 13 and sleeve 6 which can move axially with respect to flange 12. In a second embodiment, Fig. 2 (not shown), the disc springs may be weaker than above as they need to maintain the sealing only when the bushing is not under gas pressure as the greater part of the sealing force can be produced by internal pressure. The lower end of the conductor has a bell-shaped widening which is rigidly connected to a piston movable relative to a guide piece but with which it also maintains a seal, which guide piece is connected to the outer insulating tube. When the internal pressure is high the guide piece is forced up and the seal is maintained, but when the pressure is removed the disc springs are compressed and which then act in a similar way to the first embodiment.
Patent GB-1263984-A (GB)
Title: Process for producing lithium silicate compositions
Inventor: SEGURA MARNELL ALBIN
IPC: C01B33/32
Filed: 1969-05-28
Abstract: 1,263,984. Lithium silicate. ESSO RESEARCH & ENG. CO. 28 May, 1969, No. 27026/69. Heading C1A. Water soluble lithium silicate is prepared by eluting.a lithium ion-impregnated exchange resin with an aqueous solution of sodium silicate and recovering the lithium silicate-containing eluent. The resin is an aryl compound -and includes cross-linked polymers of vinyl aromatic compounds and copolymers of styrene and pdivinyl benzene containing strong mineral -acid groups attached to the polymer. By continuation of the elution, lithium and sodium silicate compositions may be obtained. In an example a 10% solution of lithium sulphate is passed through an acidified resin comprising a sulphonated copolymer of styrene and divinyl benzene. The lithium ion impregnated resin is washed to neutral pH with water and eluted with a 5% solution of sodium -silicate to obtain an eluent containing lithium silicate. The resin -may be regenerated using the sulphuric acid formed during the treatment of the resin with the lithium sulphate.
Patent GB-870986-A (GB)
Title: Improvements in or relating to a slide changer for mounted transparencies
IPC: G03B23/04
Filed: 1957-08-29
Abstract: 870,986. Optical slide changers. KODAK Ltd. Aug. 29, 1957 [Sept. 4, 1956], No. 27245/57. Class 97(1) Slides are moved from a magazine to a projection or viewing position along a guideway from a magazine in which they are disposed in a position angularly related to the guideway so that the slide changing member meets the first slide in the magazine before pushing it into the guideway. In the form shown in Fig. 5 the magazine is disposed so that the slides are tilted outwardly from the projector. The slide changer comprises a reciprocating plate 23 to which is attached a plate 24 the leading edge 25 of which engages the foremost slide and lifts it to the position shown dotted into the track along which it is then pushed to the projection aperture. When the plate is retracted means thereon, not described, withdraw the previous slide into the magazine. The device shown in Fig. 6 is provided to prevent the plate 23 being retracted until a full stroke has been made. A pivoted member 46, integral with two resilient arms 47, is pivoted at 48. The initial movement of the plate 23, to the right in this Figure, deflects the member 46 and stresses one of the arms 47 against a stop 52. After further movement the member 46 drops into a notch 53 in the bottom edge of the plate 23 and engagement of its end 51 with the end 60 of the notch positively prevents any return movement of the plate 23. As the movement of the plate 23 continues the member 46 still bears on the bottom edge of the plate and prevents reverse movement by its wedging action. At the end of its movement the end of the member 46 drops into another recess in the bottom edge of the plate and permits it to turn to the position shown dotted, during the return stroke. Specification 870,987 is referred to.
Patent GB-208833-A (GB)
Title: Improvements in or relating to motor vehicles
IPC: F16H61/02
Filed: 1922-10-10
Abstract: 208,833. Alexander, H. W. Oct. 10, 1922. Variable - speed gearing. - An indicator is fixed on the dashboard or other prominent position on a motor vehicle to indicate when the sets of change-speed gear wheels corresponding to every speed are revolving at the correct speeds for being put into mesh. A shaft a, driven from the driving shaft of the gear box, has a number of toothed discs e fixed thereto. Facing each disc e is another loosely-mounted disc e<1>, the discs e' being driven from a countershaft b which in turn is connected to the driven shaft of the gear box. Each disc e' is geared to the shaft b so that it rotates at a speed corresponding to a particular gear ratio. Between each pair of discs is arranged a disc c carrying planet pinions d gearing with both discs. When the wheels e. e<1> of any pair are rotating at the same speed, the disc c remains stationary, but when they revolve at different speeds, the disc rotates. To change speed, the engine clutch is taken out, thus allowing the driving shaft of the gear box to slow down, while the driven shaft is still rotating from the road wheels. When the particular disc c corresponding to the particular gear desired, becomes stationary, the wheels are put into mesh.
Patent GB-303585-A (GB)
Title: Improvements in or relating to bathing or swimming costumes or garments
IPC: A41D7/00
Filed: 1927-10-15
Abstract: 303,585. Browdy, M. W. Oct. 15, 1927. B u o y a n swimming and bathing dresses. - Relates to swimming costumes &c. having separate inflatable chambers around the chest and back of the wearer. According to the invention a bathing-dress comprises two thicknesses of material around the chest and/or back which form a compartment having an opening 3 through which inflatable chambers can be inserted or withdrawn. The inner or outer thickness of material may be non-distendable. The inflatable chambers may be of rubber, rubberized fabric, oiled silk or other suitable material. Tapes 4 &c. are provided for closing the opening 3. A valve-controlled tube is provided for inflating the chambers and passes through a hole in the front centre of the dress and enclosed in a pocket thereon. Undue distortion of the chambers may be prevented by securing the inner and outer walls together at spaced points. The inflatable chambers may be encircled by strengthening bands and shaped to conform to the shape of the wearer. The centre of buoyancy of the chambers is towards the front so that the costume would float an unconscious person face upwards.
Patent GB-953448-A (GB)
Title: Improved polyolefine compositions
IPC: C08K5/372
Filed: 1960-08-08
Abstract: Compositions comprise a polyolefin and, as stabilizer, a mixture of a phenol and a dialkyl polysulphide in a ratio of 5:1 to 1:5 parts by weight.  The polyolefin may be polyethylene, polypropylene or polybutene or copolymers of the corresponding monomers.  The polysulphide may be aliphatic or aromatic.  The phenol may be phenol, an alkyl phenol or dialkyl phenol or condensation product thereof with formaldehyde, acetaldehyde, propionaldehyde or acetone. Isobornyl derivatives prepared by reacting phenols with camphene in the presence of boron trifluoride-glacial acetic acid may also be used. Compositions comprising polypropylene stabilized with (1) a nonyl phenolacetone condensate and bis (octadecyl)-disulphide, bis (octadecyl)-trisulphide and bis (octadecyl)-tetrasulphide; (2) mixtures of mono- and di-isobornyl-o-cresol and bis (octadecyl)-disulphide, bis (octadecyl)-trisulphide and bis (octadecyl)-tetrasulphide; (3) mixtures of mono- and di-isobornyl-1, 2, 4-xylenol and bis (octadecyl)-disulphide, bis (octadecyl)-trisulphide and bis (octadecyl)-tetrasulphide; and (4) 2, 6-di-tertiary butyl-p-cresol with bis (octadecyl)-disulphide, bis (octadecyl)-trisulphide and bis (octadecyl)-tetrasulphide are described.
Patent GB-1536629-A (GB)
Title: Airborne moving map display arrangement
IPC: G01C21/22
Filed: 1977-06-30
Abstract: 1536629 Moving map display systems THOMSON-CSF 30 June 1977 [2 July 1976] 27514/77 Heading H4F An airborne moving map display system includes means to alter the position of the image of the map on a television display 3 in accordance with the position and heading of the aircraft, and includes a generator 6 providing synthetic video signals representing navigational data symbols, the synthetic video being applied to the display only during the frame blanking period. The map video signals VC pass to the display 3 via a mixer 10 and switch 7. Line and frame sync dignals SL, ST control a deflection circuit 4 which feeds the display via a switch 8. During the frame blanking interval the switches 7, 8 are reversed so that synthetic video and deflection signals from a generator 6 paint symbols on the display. The map video signal generator 1 may include a flying spot scanner tube (25, Fig. 3, not shown) which raster-scans a portion (Zj) of a film strip (31) bearing the map. The Y direction of movement of the image is controlled in accordance with the aircraft position by servomechanism which rotates the spools on which the film is wound. The X direction is controlled by movement of a semi-reflecting mirror (29). Rotation of the image is controlled (53) by rotating the raster on the scanner tube (25). Other ways of altering the image position are referred to.