baber/WOPTO huggingface dataset:
Patent GB-189842-A (GB)
Title: Engraving machine for use in the production of etched plates
IPC: B44B3/00
Filed: 1921-08-08
Abstract: 189,842. Allen, H. C. Aug. 8, 1921. Engraving.-In an engraving-machine for copying a pattern in a resist prior to acid etching, the tracing-stylus is adapted when manually brought into engagement with the pattern to operate electric means whereby the engraving-needle is simultaneously applied to the work by a force independent of the electric means, for example, by gravity. As shown, the invention is applied to a known type of machine wherein a stylus 27, which is adapted to be moved over a pattern 28, and is carried by a pendulum arm 26, Fig. 1, jointed to a yoke 24 carried by a fixed column 4, operates a table 9 movably mounted on the fixed head 5 of the column and carrying a needle arm 13 extending over the work 8. The stylus 27 on touching the pattern closes a primary circuit comprising leads 42, 44, the pattern 28, the stylus 27, electromagnets 41, a battery 45, and a treadle. operated switch 101, a weak current being used to avoid sparking and shocks. The electromagnets 41 when energized attract an armature 34 spring-pressed against a contact 32 thus opening a secondary circuit including leads 31, 40, connected to high voltage mains, and an electromagnet 17 whereby the latter releases the arm 13 and allows it to drop down on to the work. Spark condensers 39, 39<1> are also included in this circuit. The magnet 17 is carried by, a pivoted arm 16, Fig. 1, releasably supported on a lug 21 extending from a yoke 11 mounted on the table 9. In a modification, a vertical rod, spring-pressed upwardly to raise the arm 13, is attracted by an electromagnet to allow the arm to drop when a relay is operated as before described, the secondarv circuit in this case being closed when the stylus 27 touches the pattern. In a further modification the arrangement is similar to that shown in Fig. 1, but a storage battery is used in place of the mains for the secondary circuit and the electromagnet 17 is supported in proximity to the outer end of the arm 13 so as to increase the leverage to compensate for the use of a weak current.
Patent GB-297551-A (GB)
Title: Apparatus for separating liquids
IPC: B01D17/02
Filed: 1927-08-10
Abstract: 297,551. Comyn, B. D., and Rottenburg, L. Aug. 10, 1927. Separating by gravity.-Apparatus for the separation of liquids, such as oil and water, having different specific gravities, comprises a container with a central inlet or inlets and a plurality of separating passages leading from the centre to the periphery. The mixed liquid is supplied through a pipe 6 and a central pipe 2 to a container 1 in which it flows outwardly through spiral passages formed by guides 4. Oil rises and passes through a. partition 17 with ports 17<3> into a compartment 18, from the upper part of which it is discharged through a slotted pipe 20. The water from the bottom of the spiral passages rises through pipes 15 to a compartment 9, from which it is discharged through pipes 11, 13. Oil collecting under the partition 17 flows into the compartment 18 through the annular spaces between the pipes 15 and pipes 17<1> which surround them. Any water separating in the compartment 18 passes through pipes 19 to an upper water compartment 10, and is discharged through pipes 12, 13. The pipes 15, 19 are provided at their upper ends with cowls 19'. The pipe 2 has an upward extension which serves as an air vent, and the compartments 9, 10 have vent pipes 27, 28. A modification is described in which a single compartment takes the place of the two compartments 9, 10.
Patent GB-504818-A (GB)
Title: Improvements in or relating to the feeding of sheets
IPC: B65H9/20
Filed: 1937-07-30
Abstract: 504,818. Photo - electric control of sheet - delivery apparatus ; valve relays. WATERLOW & SONS, Ltd., and HOLNESS, R. F. G. July 30, 1937, No. 21136. [Classes 40 (iii) and 40 (v)] In feeding sheets, especially in colour printing machines, the sheets are registered to lay marks thereon in such a manner that any error in registration due to humidity or other cause is distributed about a predetermined point on the sheet, the registration of the sheet being controlled automatically by photo-elec. tric devices influenced by the lay marks. As shown, each sheet, Fig. 1/has three opaque lay marks 2, 3, 4, in two lines. intersecting at the centre point 4 of the sheet. The automatic devices ensure the centralization of the point 5 of each sheet and distributes errors of registration about this point. One such sheet 1 is fed at a time from a stack 6, Fig. 2, to a laying-on board 21 and carried on by tapes 36, 37 toward grippers 7 on an impression cylinder.8. When the laymarks 2, 3 pass between light sources 9, 10 and photo-sensitive devices 12, 13, electromagnetically controlled grippers 17, 18 respectively grip the sheet over a transverse lay-bar 20, swivelling means being provided to allow the necessary rotations of the sheet about the axes of these grippers. Then a cam 41 allows the lay-bar 20 to be moved transversely of the machine by a spring 20a until the lay mark 4 comes between a light source 11 and a photo-sensitive device 14, whereupon the lay bar 20 is locked by an electromagnetic brake 20b, 'and the sheet is fed to the grippers 7. The electromagnetic brake 20b may be replaced by a brake, Figs. 4 and 5 (not shown), comprising a pair of spring-urged gripping balls controlled by a spring urged lever adapted to be operated by an electromagnet. The photo-sensitive devices 12, 13, 14, control the various electromagnets by means of amplifiers and relays 12a, 13a, 14a, together with additional relays 22, 23, 24, and switches 25, 26, 27, the connections of which are indicated in Fig. 3 (not shown). The switches 25, 26, 27 are on a spindle 28 driven by a sprocket 28a and chain 29 from a sprocket 30 on a shaft of the sheet feeding device. The sheet may receive a preliminary registration along two edges by mechanism known per se comprising front lays 51, 52, which stop the leading edge while a spring gripper 53a pulls the sheet against a side lay 54, after which the front lays 51; 52 are lifted. The photosensitive device may be an emissive type of cell or a conductive type such as the selenium cell described in Specification 284,942. A suitable amplifier shown in Fig. 6 comprises the photo-sensitive cell 12, 13 or 14, a threeelectrode valve 66, and a gas discharge relay tube 31, 32, or 33. D.C. is supplied through a choke 79 and decoupling and biassing resistances with suitable condensers ; and the photocell is coupled to the valve 65 by resistancecapacity and the valve 65 to the relay tube by a transformer 66 and a resistance 67 to limit grid current.
Patent GB-1071213-A (GB)
Title: Temperature independent amplifier and method
IPC: H03F3/26
Filed: 1964-05-22
Abstract: 1,071,213. Voltage measurement. DANA LABORATORIES Inc. May 22, 1964 [June 4, 1963], No. 21166/64. Heading G1U. [Also in Division H3] A method of balancing a transistor differential amplifier comprises causing the emitters to be at the same potential; causing the bases to be at the same potential; adjusting the collector load so that the collectors are at the same potential; measuring the residual temperature coefficient of the amplifier; adjusting the emitter current in one of these transistors to provide a signal at the output of the amplifier which is equal to the temperature coefficient times the ambient absolute temperature and readjusting the collector load to cause the collectors to be at the same potential. As shown in Fig. 2, the differential amplifier comprises transistors 42, 44 having a common constant current source 79 and a further constant current source 74 fed to a balanceable collector load potentiometer 66. The emitter circuit may be balanced by a further potentiometer 76. A variable resistor 82 is included in series with one of the emitter circuits so as to compensate for the temperature coefficient of the amplifier or alternatively, to provide a backing off signal for suppressed zero measurements. Fig. 1 (not shown) relates to a block diagram comprising a plurality of balanced subsequent stages feeding a single ended output stage and a recording indicator. Negative feedback is provided via a network 84 (Fig. 2). The amplifier may be employed for measuring the output of a thermocouple.
Patent GB-864132-A (GB)
Title: Improved hydrocarbon resins
Inventor: BRUNNER HENRY
IPC: C08F12/34
Filed: 1958-07-02
Abstract: 864,132. Hydrocarbon resins. IMPERIAL CHEMICAL INDUSTRIES Ltd. June 10, 1959 [July 2, 1958], No. 21171/58. Addition to 850,363. Class 2(6). A hydrocarbon resin derived from a coal tar or a cracked petroleum fraction, which fraction has a boiling range lying between 150‹ and 210‹C., and contains components such as indene and styrene, is chemically modified with para- or meta-diisopropenyl benzene by copolymerizing the fraction with the isopropenyl benzene or by polymerizing the isopropenyl benzene in the presence of preformed hydrocarbon resin. Catalysts such as Friedel-Crafts catalysts, e.g. Al Cl 3 , aluminium chloride/acetone complex, boron trifluoride/acetic acid complex, or sulphuric acid may be used and the polymerization may take place in a solvent such as benzene and the reactants may be added incrementally.
Patent GB-154879-A (GB)
Title: An apparatus for re-boring engine cylinders
IPC: B23Q9/00
Filed: 1920-07-14
Abstract: 154,879. Champion, J. J., and Martindale, T. B. Nov. 28, 1919, [Convention date]. Engine-cylinders are re-bored and reamed by a single operation by a portable apparatus comprising means for securing exact positioning of the cutting-tools with respect to the crank-shaft bearings. The heads are removed from the cylinders 2 - - 5, Fig. 1, to be re-bored and the upper member 6 of the crank-shaft housing is rested upon suitable supporting-blocks. Two locating-plates 9, 14 have holes 10 - - 13 and 15 - - 18 respectively adapted to be fixed in axial alignment with the respective cylinders. The bottom locating-plate carries a lug 36 which secures accurate longitudinal positioning while the centring-device shown in Fig. 5 is used at each crank-shaft bearing to ensure correct transverse adjustment. A locator 78 having a head 79 and extension 80 adapted to fit the holes in the top and bottom plates respectively acts in conjunction with a boring and reaming tool 62 and bush 52 to obtain exact alignment of the two plates. Standard bolt holes in the cylinder housing are preferably used to carry the bolts by which the plates are finally firmly secured in position. The boring and reaming mechanism may be operated either by hand or power, that shown in Fig. 1 being hand-operated. A spindle 50 having a reduced portion 53 carries a lower cutter head 64 having blades 66 which may be radially adjusted by a conical screw member 67 and clamped by means of a plate 68. An upper cutter head 70 carries reamer blades 72 having wedges 73 locking the blades when the lower cutter head is forced upwards by its locking screw. A socket 54 attached to the bottom plate carries a feed-screw 57 when the device is mannally operated. A leather washer 75 serves to catch and retain the cuttings. A gauge 76, Fig. 14, may be used to obtain accurate adjustment of the cutting-blades relatively to the reamers.
Patent GB-592757-A (GB)
Title: Improvements in or relating to composite materials
IPC: C08L97/02
Filed: 1944-10-31
Abstract: The process of the parent Specification is modified by using as the adhesive a methylol-urea or a phenol-formaldehyde resin, which may be formed in situ.  In addition, lignin and wood flour from the same wood as the twigs to be bonded, may be added to the resin, and in the case of methylol-urea resin neutral or slightly alkaline solutions of water-soluble dyestuffs may also be added.ALSO:The process of the parent Specification is modified by using as the adhesive a methylol urea or a phenol formaldehyde resin which may be formed in situ. After placing the twigs or stalks in the mould the gaps may be filled with a mixture of wood flour and adhesive which may contain lignin. The wood may be coloured, in the case when methylol urea is used as the adhesive, by means of neutral or slightly alkaline solutions of water soluble dyes.
Patent GB-451005-A (GB)
Title: Improvements in and relating to snap action mechanism for operating electric switches, valves and other devices
IPC: H01H5/00
Filed: 1935-07-26
Abstract: 451,005. Linkwork. RICHMOND, T. G., 77, Newlands Road, and MACLAREN & CO., Ltd., R., 110, Kilbirnie Street, both in Glasgow. July 26, 1935, Nos. 21259, 21704, and 21936. [Class 80 (iii)] [See also Groups XXXVII and XXIX] A snap-action mechanism shown applied to a thermal switch comprises a spring strut 18 mounted in compression between an adjustable fixed bearing 15 and a bearing 17 on an arm 5 which is pivoted at 6 and carries at its other end a contact 7 cooperating with a fixed contact 8. The bearing 17 is offset upwards relative to the line 6, 15 so that the arm 5 is biassed in a clockwise direction. A spring member 20 is fixed to the base of the switch and has an extension 21 which engages the strut 18. A member 29 bears on the spring 21 to push the strut 18 downwards, and as the strut approaches the dead-centre position its clockwise turning moment diminishes rapidly and allows spring 21 to move the contact arm rapidly downwards until arrested by a stop 12 which prevents the arm from passing the dead centre position and hence allows an automatic return on removal of the operating force. Specifications 288,595, [Class 80 (iv)], and 370,920, [Group XXXVII], are referred to.
Patent GB-781047-A (GB)
Title: Improvements in or relating to a measuring device for machines for manipulating cut tobacco
IPC: G05D7/06
Filed: 1951-08-15
Abstract: 781,047. Radiation gauges. MOLINS, D. W., POWELL, G. F. W., and MOLINS MACHINE CO., Ltd. Aug. 15, 1952 [Aug. 15, 1951], No. 21261/54. Divided out of 781,042. Drawings to Specification. Class 40 (3). [Also in Groups XXXV and XXXVI] The whole of the subject-matter of this Specification is included in Specification 781,042 but the claims are directed to obtaining a measure of quantity of tobacco by combining the electrical outputs of two detectors, one responsive to total mass and the other mainly responsive to moisture. Specifications 646,746, [Group VI], 684,503 and 781,050, [Group XXXV], also are referred to.
Patent GB-376512-A (GB)
Title: Improvements in thread guides for doubling, twisting and like machines used in the production of yarns or threads
IPC: D01H13/04
Filed: 1931-07-25
Abstract: 376,512. Thread guides for doubling, twisting, and like machines. ATKINSON, J. S., Mill House, Ilkley Road, Otley, Yorkshire. July 25, 1931, No. 21272. [Class 120 (ii).] In doubling, twisting or like machines additional threadguiding members 2, 3, 4 are arranged below the ordinary thread guide-eye f so that each thread in the series of threads to be twisted or doubled together is kept separate from the other threads until a point after the additional guiding members. The thread guides 2, 3, 4 are fixed at a<1> to a base member a which is adjustably fixed between the lever b and the adjustable balancing weight c fixed on said lever by the screw d. The threads 5 .. 8, Fig. 3, after passing through the opening f<1> in the guide-eye fare kept separate by the guides 2, 3, 4 after which they are twisted as shown at g. The ends of the guides 2, 3, 4 are bent laterally to facilitate the passing of the threads between them.
Patent GB-383307-A (GB)
Title: A new or improved sharpener for safety razor blades
IPC: B24D15/08
Filed: 1931-09-14
Abstract: 383,307. Sharpening razors. KINGS PATENT AGENCY, Ltd., 146A, Queen Victoria Street, London.-(Hecker, C. B. ; 2, Lloyd Road, Singapore). Sept. 14, 1931, No. 21307. [Class 60.] A device for sharpening razor blades consists of a glass member comprising two semicircular parts 1, 3 united at 7, the surface 6 of the part 3 being finely frosted to constitute a honing, surface and the surface 5 of the part 1 being smooth.
Patent GB-183368-A (GB)
Title: Improvements in spring-balances or other self-indicating scales
IPC: G01G3/08
Filed: 1921-08-11
Abstract: 183,368. White, J. B., and Wallace, R. A. D. Aug. 11, 1921. Indicating-mechanism; spring balances.-An automatic weighing or price-computing scale has a resilient weighing-beam comprising parallel leaf springs supporting the scale pan at one end and secured at the other end with the extreme points of flexure in vertical alignment. As shown in Fig. 1 the weighing-beam comprises leaf springs 1, 1 carrying a scale pan D at one end and clamped at the other end to a fixed support 2 so that the extreme points of flexure at that end are in vertical alignment. The indicating-pointer C is carried by flexible strips 6 and is operated from the scale-pan support by a yoke 8, flexible band 9, and eccentric disc 10. In a modification the yoke 8 is replaced by a triangular frame 12, Fig. 3, carrying a flexible strip 6<a> attached to a block 13 which is suspended by a flexible strip 14 from a yoke 15. The indicating-pointer is secured to the strip 6<a>, and the yoke 15 is suspended by flexible strips 16 from the fixed end of the weighing.beam. Thus when the scale pan descends, the indicating-pointer is caused to turn. To prevent displacement of the centre of rotation of the pointer during its movement an arm 15a of the yoke is coupled by a flexible member 18 to an arm 19 of the frame 12. The position of the flexible member 18 on the arms 15a, 19 may be adjusted to regulate its effect on the pointer. The pointer C has a hinged and spring-pressed portion 33 adjustable by means of a screw 36. In a further modification, the capacity of the machine may be increased bv means of a steelyard coupled to the scale-pan support through a series of flexible strips, and the indicating- pointer is operated from the steelyard. To avoid errors due to parallax when reading the dial, the indicating-pointer terminates, at each side of the dial, in two indicating points, both of which should be in the line of vision when reading. In further modifications, instead of supporting the indicating-pointer above a strip 6. Fig. 1 the strip 6 may be arranged as a suspension member, or the members 6, 9 may be formed from a continuous strip passing round a drum to which the pointer is attached. The indicator may be mounted on knife-edges and be actuated by a flexible band.
Patent GB-1170700-A (GB)
Title: Improvements in Pistons and Rings therefor, particularly for Internal Combustion Engines
Inventor: CROSS ROLAND CLAUDE
IPC: F16J9/20
Filed: 1968-05-06
Abstract: 1,170,700. Piston rings. CROSS MFG. CO. (1938) Ltd. 17 July, 1968 [6 May, 1968], No. 21348/68. Heading F2T. A piston and ring assembly comprises a piston 1 having two piston ring grooves 2 disposed one on each side of the gudgeon-pin axis 3 and each housing a ring 4, 6 of rightangled triangular cross-section with unequal sides and one face 5 forming a cylinder-engaging surface. The ring 6 is preferably slightly coned, when unstressed, so that in use its bottom edge, which projects slightly below the piston skirt, acts as a scraper. In a modification, Fig. 3 (not shown), the ring (4a) is formed from a metal strip bent into V-form. The grooves and rings may be helical.
Patent GB-464181-A (GB)
Title: Improvements in vent plugs for electric accumulators and the like
IPC: H01M50/655
Filed: 1936-08-01
Abstract: 464,181. Batteries. CHLORIDE ELECTRICAL STORAGE CO., Ltd., and BROWNE, A. W. Aug. 1, 1936, No. 21373. [Class 53] A vent plug is provided with a rubber or other resilient diaphragm o which closes an opening k in the plug when the battery is tilted but which is kept away from the opening when the battery is upright by a loose weight f resting on a plunger m. The latter is fluted and the diaphragm is provided with openings s to allow gas. to escape and to allow any liquid passing into the interior of the plug to drain back into the battery. Grooves or channels j may also be provided for the same purpose. The plug may be made of three moulded parts a, b, c and the diaphragm o may be gripped between the parts a, b as shown in Fig. 1. Fig. 7 shows a modification in which the diaphragm is provided with a beaded edge q engaging a groove in the member b. The outlet g may be provided with a seating n to receive the weight f when the battery is inverted and so prevent liquid from escaping. A space i receives any liquid in the plug when the battery is inverted. The weight f may consist of a ball, as shown, or of a truncated cone, and the diaphragm o may be made of rubber. Slots u in the part a of the plug, or wicks t as shown in Fig. 9, may be provided to aid the return of liquid in the plug to the battery.
Patent GB-264413-A (GB)
Title: Appliances for pressing or acting on the creases of trousers
IPC: A47G25/72
Filed: 1926-08-31
Abstract: 264,413. Dutton, J. Aug. 31, 1926. Trouser presses. Means for pressing the creases of trousers consists of four independent longitudinal or marginal pinching-laths or clips each consisting of two laminated boards b, c, the lower board b being wider than the upper board c and the two boards being separate, or hinged along one longitudinal edge, and forced together by screws with nuts or by spring clips. In Fig. 1 the lower board of each clip carries bolts d which pass through slots in brass plates d<1> fixed to the upper board and are provided with wing-nuts f. Fig. 4 shows boards b, c hinged at g and pressed together by means of detachable clip springs h. Specification 274,572 is referred to.
Patent GB-393117-A (GB)
Title: Method for purifying gases by means of liquid wetted filters
IPC: F02M15/02
Filed: 1932-08-02
Abstract: 393,117. Washing gases. FRANCKE, W., Enzelterstrasse, Aarau, Switzerland. Aug. 2, 1932, No. 21634. Convention date, Sept. 19, 1931. [Class 55 (ii).] Gas is purified by spraying liquid intermittently or in successive sections through a filter with a large surface and fine passages so that liquid is first retained in these passages and is then expelled by the gas, which passes in the same direction, the dust particles retained being washed out by the succeeding spray. The liquid may be sprayed through radial arms 18 preferably with lateral spray holes so that the pressure of the liquid jets rotates the arm close to the filter, which is of metal, glass or cotton wool, horse hair, felt, asbestos, lead wool, shavings or strips 12 held between metal screens 13 about 1 cm. apart. An annular grid may be used for spraying, and baffles 19 may direct liquid drops towards a trough whence it runs to a tank where it is agitated and recirculated. The spraying may be time-controlled, and the filter may be rotated, a fan for the gas being mounted on the axis of the filter. Benzene may be thus washed from gas, or benzene may be sprayed to dissolve hydrocarbons, e.g. tar from blast furnace gas. Lime may be added to the water to retain sulphur dioxide. Reference has been directed by the Comptroller to Specifications 115,546 and 142,941, [both in Class 55 (ii), Gas manufacture &c.].
Patent GB-739585-A (GB)
Title: Improvements in or relating to devices for mixing tokens
IPC: G07C15/00
Filed: 1954-07-26
Abstract: 739,585. Chance apparatus. RAIZEN, C. S. July 26, 1954, No. 21768/54. Class 132(2). Apparatus for mixing numbered tokens 12 and ejecting them one at a time in random order comprises a housing 5 in which a receptacle 4 can be rotated by a crank 7, the diameters of the housing and receptacle being such as to leave an annular channel between their peripheries for the tokens. The tokens are inserted into the receptacle through a housing door 15 and an aperture 11 in the receptacle. The receptacle is then rotated clockwise, Fig. 2, to mix the tokens and any token falling through the aperture 11 in the receptacle when at the bottom is swept round the channel by a transverse wall 21 and then falls back through the aperture when it reaches the top. The rotation is then reversed, and any token falling through the aperture 11 when at the bottom is swept along the channel by the transverse wall 21 until it reaches a delivery opening 14 in the housing through which it falls into a cup 18. The receptacle wall in front of the wall 21 is sloped at 19 to form a delivery shoot.