baber/WOPTO huggingface dataset:
Patent GB-367790-A (GB)
Title: Improvements in or relating to electric negative resistances
IPC: H01C1/14
Filed: 1930-08-13
Abstract: 367,790. Generating and amplifying high-frequency oscillations. HABANN, E., 44, Stargarderstrasse, Berlin. Aug. 13, 1930, No. 24262. Convention date, Aug. 16, 1929. [Class 40 (v).] A material such as galena, which in contact with an iron wire has a negative resistance characteristic, is reduced to fine powder and placed between electrodes, the pressure of which is adjusted so as to produce a negative resistance characteristic by the loose contact between the individual grains. The size of the granules is determined experimentally, and is stated to be below 0À1 mm. The pressure of the electrodes necessary is stated to vary directly with the volume of the substance. As an example, with a column 1 sq. mm. in area and 1 cm. long, the pressure should be in the neighbourhood of 300 grms. per sq. em- A mixture of lead sulphide with a small proportion of copper sulphide is fused or sintered as disclosed in Specification 360,920, and then powdered. Metals, such as iron or molybdenum, which give a negative resistance characteristic in contact with the substance used may be added. About one-third of its volume of a neutral powder of the same chemical nature, such as antimony trisulphide, is then added and the mixture ground up and pressed firmly between two electrodes. The pressure in this case may be about ten times that required when the neutral powder is absent. The resistance powder may be immersed in a non- conducting liquid such as oil, benzol, &c. This liquid or the surrounding gas is preferably subjected to a pressure higher than atmospheric. The resistance may be cooled by embedding a number of metal discs in the mass so as to project at their edges as cooling ribs, which may dip into oil. Resistances made in accordance with the invention are applicable for the generation and amplification of electric oscillations, and may be employed as repeaters in telephone lines. Reference has been directed by the Comptroller to Specifications 103,046 and 292,110, [both in Class 37, Electricity, Measuring &c.].
Patent GB-1034695-A (GB)
Title: Fluid-pressure-operable clamping and like devices
Inventor: WILLIAMS ANTHONY PHILIP
IPC: B23Q3/08
Filed: 1964-06-12
Abstract: 1,034,695. Work-holding. DOWTY TECHNICAL DEVELOPMENTS Ltd. May 27, 1965 [June 12, 1964], No. 24403/64. Heading B3B. [Also in Division F1] A clamping device for use in machine-tools comprises a double piston-and-cylinder unit, the first piston 23 being operable to hold the work lightly and the second 24 to intensify the pressure, there being sealing means 42 between the larger end face of the second piston and its co-operating cylinder face so that only a portion of its area is initially effective. The device is otherwise as described in Specification 1,027,121. The pressure may be supplied by an electrically-driven pump.
Patent GB-1291349-A (GB)
Title: Near point cards for binocular refraction
IPC: A61B3/02
Filed: 1970-05-20
Abstract: 1291349 Sight testing AMERICAN OPTICAL CORP 20 May 1970 [30 June 1969] 24403/70 Heading G2J A near-point card for testing binocular vision consists of two super-posed mirror-reversed images each polarizing light in planes mutually at right-angles and having an opaque backing.
Patent GB-318736-A (GB)
Title: Countersinks and countersunk-headed rivets for hot riveted joints
IPC: F16B19/06
Filed: 1928-08-24
Abstract: 318,736. Goebel, E. Aug. 24, 1928. Rivets. - The countersunk surface of a hot rivet is formed with one or more shoulders, each consisting of portions of the surfaces of cones with differing semivertical angles a. The hole in one of the plates to be secured together is similarly formed to receive these shoulders, thus preventing the slackening of the rivet by contraction during cooling.
Patent GB-172083-A (GB)
Title: Improvements in and relating to supervisory or indicating and recording mechanism for valves
IPC: F16K37/00
Filed: 1920-08-24
Abstract: 172,083. White, A. E., (Newman Clock Co.). Aug. 24, 1920. Indicating and recording mechanism, applications of.-Relates to supervisory or indicating and recording mechanism for valves, more particularly for automatic sprinkler systems, and consists mainly in means whereby a record-producing key or the like is made accessible, for use in connection with a watchman's tell-tale clock, only when the valve is in its normal (open) position. For this purpose the valve handle is fitted with a cylindrical box 18, Figs. 2 and 5, and the top of the screwed valve spindle 14 with a container 20 having a hinged door 21. When the valve is in the abnormal (closed) position, shown in Fig. 2, the key and its attachment chain are enclosed within the container which is drawn down within the box 18. In the open position, Fig. 5, the door 21 can be opened to obtain access to the key 26. In this arrangement the top of the container 20 carries a visible indicator plate with the word " open " thereon, which is exposed in the open position of the the valve. A hinged plate 29 with the word " shut " thereon is projected beyond its shield 30, as shown, in the closed position of the valve. Fig. 4 shows means for adjustably connecting the key container 20 to the valve spindle 14.
Patent GB-188453-A (GB)
Title: Improvements relating to steam separators and strainers
IPC: F01B25/00
Filed: 1921-09-15
Abstract: 188,453. Gill, J. F., and Chaviara, J. N. Sept. 15, 1921. Separators.-The steam flows axially into a hunk-like element comprising a number of coaxial annular elements with intermediate spaces from which it passes radially in thin sheets. A spring coil d, preferably tapered, projects horizontally from the inlet c of the casing a, and is closed at its inner end by a cap e which is attached to a stem f slidably supported by the bridge-piece g. The spring may be close coiled, the entry of the steam causing it to expand sufficiently to provide narrow spaces for the outlet of the steam. In a modification, the spring is suspended vertically from an extension which is fixed to the inlet in order that the outlet shall be above the spring.
Patent GB-427159-A (GB)
Title: Improvements relating to conveyors
IPC: B07B1/10
Filed: 1933-12-04
Abstract: 427,159. Endless-belt conveyers. ALLEN, W. H., 142, Salisbury Road, Moseley, Birmingham. Dec. 4, 1933, Nos. 24728/34 (divided out of 426,890), and 24729/34. [Class 78 (i)] [See also Group II] A sifting-apparatus comprises a perforated travelling belt and a succession of co-operating relatively stationary and longitudinally spaced deflectors which are alternately inclined in opposite directions. The belt 1, Fig. 1, is formed with perforations 3, Fig. 2, and passes over a series of hoppers 8. Deflectors 6, 7 cause the material to be agitated continuously or intermittently during conveyance, thus facilitating the passage of the smaller particles through the perforations 3. The material remaining on the belt after all the hoppers have been passed either may be discharged on to the lower run for further grading by a plough 9 and shoot 10, or discharged over the terminal drum when the plough is raised. At the end of the lower run a plough 12 discharges the material into a hopper 13. In a modification, Fig. 6, the belt has apertures 3, 3<a> of different sizes, and side walls 14 confine the material during the first part of its travel to the part containing the smaller apertures. At the end of the walls 14 a plough 15 deflects the material which has not passed through the smaller holes on to the outer portions of the belt containing the larger apertures where it is agitated by a series of ploughs 7b. Further rows of holes may be provided outside the holes 3. Brushes may be used to facilitate the passage of the material through the holes, and scrapers or brushes engaging the underside of the belt may push back any material which has not passed completely through. The deflectors may be mounted on travelling carriages. Specification 426,890 is referred to.
Patent GB-778272-A (GB)
Title: Organosilicon compounds
IPC: C07F7/12
Filed: 1955-08-29
Abstract: The invention comprises organosilyl methyl thiocyanates of the formula XaSi(CH2SCN)b, in which X is a monovalent hydrocarbon radical or a hydrocarbonoxy radical, a is 2 or 3, b is 1 or 2, and a + b = 4, and siloxanes of the unit formula:  <FORM:0778272/IV(a)/1> in which a is 0, 1 or 2, X and b are as above, a + b is not greater than 3.  The silanes are prepared by reacting compounds of the formula XaSi(CH2Cl)b with alkali metal thiocyanates in acetone solution.  The siloxanes may be prepared by reacting chloromethyl siloxanes with alkali metal thiocyanates in acetone or by hydrolysing hydrocarbonoxy silyl methyl thiocyanates.  The radical X may be alkyl, alkenyl, cycloaliphatic, aryl, alkaryl, aralkyl and their corresponding oxy radicals.  In the examples: (1) 1,3-bis-(thiocyanatomethyl) tetramethyl disiloxane [Me2(NCSCH2)Si]2O is prepared from bis-chloromethyl tetramethyl disoloxane and potassium thiocyanate. (2) Me3SiCH2SCN is prepared from Me3SiCH2Cl and KSCN.  (3) A copolymer having the units Me2SiO and Me (NCSCH2)SiO is prepared from KSCN and chloromethylheptamethylcyclotetrasiloxane.  (4) The disiloxane O[SiMePh(CH2SCN)]2 is prepared from KSCN and sym.-bis-chloromethyldimethyldiphenyldisiloxane.  (5) Me2Si(CH2 SCN)2 is obtained from KSCN and Me2Si (CH2Cl)2.  (6) Siloxanes having the unit formulae NCSCH2SiO1.5, EtO(NCSCH2)SiO and (EtO)2(NCSCH2)SiO0.5 are prepared by hydrolysing (EtO)3SiCH2SCN which is itself obtained from KSCN and (EtO)3SiCH2Cl.  (7) (C17H38) (CH2 = CH)(PhO)SiCH2SCN is prepared from KSCN and octadecylvinylchloromethylphenoxy silane, and is hydrolysed to the disiloxane [(C18H37)(CH2 = CH)(CH2SCN)Si]2O.
Patent GB-904877-A (GB)
Title: Fluorocarbon compounds
IPC: C08G65/22
Filed: 1960-07-15
Abstract: The invention comprises fluorocarbon epoxides of the formula <FORM:0904877/IV (b)/1> or <FORM:0904877/IV (b)/2> where X1, X2, X3 are fluorine or perfluoroalkyl radical and X4 is a perfluoroalkyl or an omega-hydroperfluoroalkyl radical and X5 is a perfluoroalkylene radical, such as hexafluoropropylene epoxide with a B.P. of -27.4 \sB 1 DEG C. at atmospheric pressure, and a method of preparation by reacting a fluoro-olefine of formula, <FORM:0904877/IV (b)/3> or <FORM:0904877/IV (b)/4> with an aqueous alkaline solution of an inorganic peroxide. Hydrogen peroxide is preferred and the aqueous solution made alkaline with for example, sodium, potassium and ammonium hydroxide, and sodium carbonate, bicarbonate and acetate and potassium acetate may include water miscible organic compounds such as aliphatic alcohols, ketones, aldehydes and esters, and a temperature in the range -50 to +50 DEG C. is preferred for reaction. Examples describe the preparation of hexafluoropropylene epoxide, perfluoro-1,2-epoxy-heptane and iso-butane, perfluoro-2,3-epoxy-2-methyl and -4-methyl pentanes, octafluoro-2,3-epoxybutane, octafluoro - 1,2 - epoxycyclopentane, perfluoro - 2,3 - epoxy - 2,3,5 - trimethyl hexane, perfluoro - 3,4 - epoxy-2,3,5-trimethyl hexane, and 8-hydroperfluoro-1,2-epoxyoctane. Specification 672,720 is referred to.
Patent GB-1525035-A (GB)
Title: Extraction of fat and oil
IPC: C11B1/06
Filed: 1976-06-15
Abstract: 1525035 Extracting fats and oils ISHIKAWAJIMA-HARIMA JUKOGYO KK 15 June 1976 [18 June 1975] 24754/76 Heading C5C Fats or oils are extracted from an oil-bearing fruit by feeding the fruit P, in particular palm fruit via charging port 2 to a water jacketed pulper 1 containing a rotor 5 and filter screen 6, pumping the slurry of oil, fibres and nuts via pipe 20 to a centrifugal separator 16 where the nuts and fibre are separated into chamber 15 and the oil into chamber 14 from where it flows via 26 into chamber 24 of tank 25 and pumping part of the oil in 24 via 29 back to the pulper 1. The oil in 24 passes through filter 22 into the product oil chamber 23 of tank 25. The nuts and fibre are removed via screw conveyor 21.
Patent GB-1102229-A (GB)
Title: Combination can opener and knife sharpener
Inventor: HUBRICH FREDERICK MARTIN
IPC: B67B7/70
Filed: 1965-06-11
Abstract: 1,102,229. Electric can openers. JOHN OSTER MANUFACTURING CO. 11 June, 1965 [18 Aug., 1964], No. 24796/65. Heading B8D. An electric can opener has two switches 60, 85, in parallel, the switch 85 being kept closed only by the lateral thrust of a helical gear 39 against a switch arm 86 caused by the resistance of the can lid to the rotary cutter 36 which transmits load to the gear 39 through reduction gearing 37. To insert a can in the machine, an operating lever 57 is raised vertically which allows a plate 54 carrying the cutter 36 to pivot anti-clockwise. Fig. 5 (not shown), under the action of a spring 56, thereby raising the cutter and also a magnetized lid retainer 75. The can rim is inserted above a rotary feed wheel 35 driven from a motor 21 through the gearing 37. The lever 57 is lowered, pivoting the plate 54 clockwise through the engagement of members (57b) and (54e), Fig. 4 (not shown), to lower the cutter, and closing the switch 60 through members 62, 61 to start the motor 21. The feed wheel 35 is rotated and thereby the can also. The gear 39 slides on its shaft 42, so depressing the spring arm 86 and closing the switch 85. The operator may then release the lever 57 which is raised fractionally, Fig. 4 (not shown), under the spring pressure of the switch 60 which opens. The motor 21 continues to operate under control of the switch 85 until the load transmitted through the gearing 37 is released. The spring arm 86 then slides the gear 39 along its shaft at the same time opening the switch 85 to stop the motor. Knife sharpener.-Grinding wheels (23, 24), Figs. 1 and 11 (not shown), are driven simultaneously with the can opener through worm gears (29) and helical gears (30). A pressbutton (88) operating directly on the arm (86) of the switch (85), Fig. 9 (not shown), enables the sharpener to be used independently of the can opener.
Patent GB-599945-A (GB)
Title: Improvements in or relating to lifting jacks
IPC: B66F3/16
Filed: 1945-09-25
Abstract: 599,945. Universal joints. SMITH'S JACKING SYSTEMS, Ltd., and SMITH, H. Sept. 25, 1945, No. 24838. [Class 80(ii)] [Also in Group. XXX] A universal joint connecting the extending screw 12 of a lifting jack (see Group XXX) to its operating mechanism comprises a hexagonal nut 35 secured to the screw engaging in a slightly larger hexagonal cup-shaped member 34 secured to a spindle 30 rotated through gear wheels 31, 26 by a handle 27.
Patent GB-631995-A (GB)
Title: Improvements in and relating to dough depositing mechanism
IPC: A21C9/08
Filed: 1947-09-10
Abstract: 631,995. Endless-belt conveyers. BAKER PERKINS, Ltd. Sept. 10, 1947, No. 24890. Convention date, Dec. 26, 1946. [Class 78 (i)] In depositing mechanism for dough-pieces wherein a train of pans is moved past a filling station on a continuously moving conveyer and stop means is provided for halting each pan in position to receive a dough-piece, the stop is released by the next succeeding dough-piece and held by control means delaying its return to pan halting position until the filled pan is moving at conveyer speed. The stop means comprises a pair of fingers 1 engaging the ends of the pans which are longer than the conveyer slats which continuously slide underneath the pans until they are released. The releasing means comprises either an electric switch 16, Fig. 2, which causes a main valve 12 to be opened by means of an electromagnet, or a directly opened valve 12a, Fig. 5, causing compressed air to be fed through two pipes 3 and 14 to a delay action valve 13. The dough-piece is rolled along a table above the pan conveyer by means of a belt conveyer above, and on passing a spring loaded lever 2 depresses it against spring pressure, Fig. 2, for a time long enough to put a shot of air through valve 13 and a pipe 15 to a cylinder 4 sufficient to push its piston 5 to the end of its travel. Piston 5 is connected to a crank 8 on a shaft 9 which it moves against the force of a spring 6, a further pair of cranks 11 on shaft 9 raising two bars 10 the other ends of which are supported by two further cranks 11 so that the fingers 1 are depressed. Valve 13, Fig. 4, comprises a cylinder 13k in which a piston 13f is urged upwardly by a spring 13l, the piston stem having two valve members 13a and 13c. When a shot of air is put through pipes 3 and 14 the piston is depressed, closing valve 13c and opening valve 13a to allow air to pass from pipe 3 through aperture 13b to pipe 15. After the dough piece has passed lever 2 and the air supply from valve 12 or 12a is cut off, air leaks from space 13k through an adjustable valve 13g until the rise of piston 13f opens valve 13c allowing the air in cylinder 4 to escape through passages 13d and 13e. Thus fingers 1 are depressed for a suitable length of time and then released after the filled pan has picked up conveyer speed ready to snap up into the space preceeding the next pan.
Patent GB-326750-A (GB)
Title: Improvements in shears, scissors and like cutting implements
IPC: B26B13/28
Filed: 1929-08-15
Abstract: 326,750. Andrews, J. G. Aug. 15, 1929. Scissors - In scissors, shears, &c., the blades are pressed together when in use by means of a spring 21 house in a hole pivot pin 13 in the handle 20, drilled parallel to the portion 16 of one of the blades. The spring may press on the other handle portion 17 directly or through a hard steel stud 22 which has a short stem engaging the upper convolutions of the spring.
Patent GB-303392-A (GB)
Title: Improvements in smoker's compact
IPC: A24F15/08
Filed: 1927-09-22
Abstract: 303,392. Sklar, S. B. Sept. 22, 1927. No Patent granted (Sealing fee not paid). Contents, facilitating access to; fittings, internal; cases combined with smokers' articles.- A smoker's combination consists of a case 1 open at both ends in which are hinged doors 3, 4 of which one carries an elongated compartment 7 for cigars or cigarettes, while the other has a spring clip (not shown) to hold a box of matches and two channel-pieces 9<1> between which a package of cigarettes is inserted. A slidable ash-tray 10 is secured by a removable pin.
Patent GB-825587-A (GB)
Title: Improvements in and relating to the storing of elongated strips
Inventor: MACDONALD DUNCAN NORTH
IPC: G11B23/50
Filed: 1957-08-08
Abstract: 825,587. Magnetic sound recording. BURROUGHS CORPORATION. Aug. 8, 1957, No. 24980/57. Class 40 (2). A bin for holding magnetic tape comprises two plates 18 and 19 joined by a strip 20 which forms the bottom and sides of the bin. A partition 21 divides the bin into two compartments and sloping baffles may be fitted to reduce the weight of tape resting on the lower loops. The inner surface of one of the plates is electrically conductive and at least one of the plates is perforated. In a modification the partition 21 does not extend to the bottom of the bin and has a tape guiding surface 23. In a further modification (Fig. 4) a number of bins are formed of panels which have three edges turned up to form the bottom and sides of the bin. Bolts 27 and 28 secure the assembly. The construction of Fig. 4 may be modified to comprise a base (see Fig. 5, not shown) having rows of slots into which are fitted tabs on the bottom of the plates forming the bin. Specification 825,588, [Group XIX], is referred to.
Patent GB-738764-A (GB)
Title: Improvements in or relating to electromagnetic interaction pumps suitable for liquidmetal
Inventor: WATT DUDLEY ALBERT
IPC: H02K44/06
Filed: 1952-10-06
Abstract: 738,764. Dynamo - electric machines. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Jan. 6, 1954 [Oct. 6, 1952; March 26, 1953], Nos. 25045/52 and 8457/53. Class 35. An electromagnetic interaction pump comprises a closed iron circuit 1 carrying a primary winding 2 and a secondary winding 3, a second iron circuit 4 shunting that part of the main iron circuit carrying the secondary winding and spaced from it by an air-gap 5 in which is situated a liquid duct and across which flux is forced by the ampere-turns of the secondary coil current, this current traversing the liquid pumped. In its simplest form, Fig. 1a, the liquid in duct 6 is traversed by current from the secondary coil 3, sheets 8 of resistive material outside the flux zone being used to reduce leakage currents. Liquid flow may be reversed by means of an alternative primary winding on that part of the main core embraced by the shunt. In the developed form, Fig. 2, the liquid itself is contained in an annulus round the main core, the shunt being composed of arms 23 and the main core being built partly of a bar 20 with radial laminµ. The annulus is connected to four pipes 26, 27. A modification is described in which the air-gap tapers in an axial direction to reduce fringing flux. Eddy currents in the pipes 26, 27 may be prevented by surrounding them individually or collectively with packets of laminated iron. Specification 511,137, [Group II], is referred to.
Patent GB-1473047-A (GB)
Title: Speaker grilles
IPC: H04R1/02
Filed: 1975-06-11
Abstract: 1473047 Speaker grilles; radio constructions NORTHERN ELECTRIC CO Ltd 11 June 1975 [21 June 1974] 25059/75 Headings H4J and H3Q A speaker grille comprises a plurality of parallel ribs 12 in a cover 10 of a housing (not shown) and a mask 17 secured to the ribs 12 (e.g. by sonic welding to smaller ribs 32) on an inner surface of the cover. An aperture (see Fig. 5, not shown) in the mask 17 is at a position to correspond with a speaker position. The ribs 12 each have a cross-section, normal to the longitudinal axis of the rib, substantially in the form of a Z and include upper and lower cross-bars 21, 22 (Fig. 4) connected by a web 23. The ribs are separated by sinuous channels 24, 25 extending completely through the grille. The outer and inner portions 24, 25 are offset relative to each other to substantially prevent direct view between the ribs 12 in a direction normal to the outer surface of the grille. As described the grille is applied to a telephone set including a speaker and microphone. It can also be applied in radio sets and in other forms of communication apparatus.
Patent GB-216769-A (GB)
Title: Improvements in yarn reels or winders
IPC: B65H49/30
Filed: 1923-10-09
Abstract: 216,769. Marks, E. C. R., (Bemberg Akt.-Ges., J. P.). Oct. 9, 1923. Swifts.-Yarn reels, especially those used for winding artificial threads such as imitation silk, comprising a stave-carrying arm S fixed to the shaft and an arm S<1> movable on the shaft to collapse the reel, are provided with a nose N on the fixed arm adapted to engage a seat R in a spring-device on the movable arm to lock the arms in the operative position, a stop being formed on the spring-device to limit the movement of the arms. One of the staves L<1> is pivoted on the arms to facilitate the movement of the arm for the removal of the skeins, and is held in position during winding by the yarn, a single turn being taken around it, or it may be held by a light spring, a pin, or other means. The nose and the spring-device may be made of acid-proof material.