baber/WOPTO huggingface dataset:
Patent GB-637323-A (GB)
Title: Improvements relating to variable pitch propellers
IPC: B64C11/30
Filed: 1947-07-31
Abstract: 637,323. Variable-pitch propellers. GENERAL MOTORS CORPORATION. July 31, 1947, No. 20782. Convention date, Oct. 21, 1940. [Class 114] In a tandem variable-pitch air-screw rotated in opposite directions by a single engine the rear screw is controlled externally whilst the pitch of the forward screw is adjusted to correspond to the pitch of the rear screw blades. The blades c of the rear screw are operated by supplying pressure fluid from the pump j, above or below the piston l under the control of the valve i. The pump is driven by contact with a doublelobed face cam k. The control valve is moved radially by centrifugal force to maintain a constant speed against the action of a spring h, the set speed being adjusted by moving the roller g by longitudinal movement of the collar e from the control lever d. The forward blade cc is similarly adjusted by supplying pressure fluid from the pump jj above or below the piston ll under the control of the valve ii, the pump being driven by the single lobed face cam kk. The control valve is adjusted by the bell-crank lever xx from the collar ee moved longitudinally by screw and nut gearing driven by the movement of the ring gear o connecting the roots of the blades c. The valve ii is also moved by the follow-up gear link ss one end of which is attached to the rod uu operating the bell-crank xx and the other end of which follows the cam slot rr in the crown wheel oo. The cam slot can be shaped so that the blades of the forward propeller exactly copy the movements of those of the rear propeller or they may have a proportional movement only. Specifications 544,580 and 545,520 are referred to.
Patent GB-1244527-A (GB)
Title: Carpet sweeper
IPC: A47L11/33
Filed: 1969-04-23
Abstract: 1,244,527. Carpet sweepers. LEIFHEIT INTERNATIONAL GUNTER LEIFHEIT K. G. April 23, 1969, No.20809/69. Heading A4F. In a carpet sweeper having a brush roller 6, which may be unidirectionally rotated by a drive wheel 7 irrespective of the direction of rotation of the latter, the drive wheel 7 is so mounted that it is displaced into driving engagement with one or the other of two inter-engaging wheels 10, 11, the wheel 11 being directly drivably connected with the brush roller 6. The carpet sweeper illustrated has two brush rollers 6 at each end of which is an assembly of the wheels 7, 10, 11 and a mounting wheel 12, the wheel 7 having an internal toothed gear 9. Each mounting wheel 12, meshes with a gear 9 and restrains the associated wheel 7 so that it can move relatively to the wheels 10, 11 and 12 backward and forward only in the direction of travel of the carpet sweeper. In an alternative embodiment the two inter-engaging wheels 110, 111 Fig.3 (not shown), within a drive wheel are arranged on an arm which is pivotable by a lever to provide a vertical adjustment of the brush roller.
Patent GB-583427-A (GB)
Title: Improvements in or connected with safety guards for presses and the like
IPC: F16P3/04
Filed: 1944-10-26
Abstract: 583,427. Machinery guards. HAFFENDEN, P. A. W. Oct. 26, 1944, No. 20847. [Class 80 (iv)] The guarding door of a hydraulic press is associated with the press control valve so that should the door not be closed movement of the press acts to open the valve to exhaust. As shown, the guarding door 12, Fig. 1, is attached to a post 13 having a collar bearing against a fixed part 11 of the press, so that the post is both rotatable and slidable whereby its upper end can co-operate with the operating spindle 2 of a valve 1 which is connected at 4 to the main pressure feed line and at 8 to exhaust. At its lower end the post 13 passes through a hole in a fitting 9 on a moving part 10 of the press. Leading from this hole are vertical slide slots 15 and on the post are corresponding vertical projecting side fins 16, Fig. 3, so arranged that only when the door 12 is properly closed are the slots and fins aligned, whereby the moving part 10 can ride up the post 13. When the door is not properly closed, the fins and slots are out of register and when the main pressure valve is opened and the ram rises the post 13 will be coupled to the fitting 9 and will move with it so that its upper end will displace the spindle 2 of the valve and connect the main feed to exhaust, so stopping movement of the part 10. The connection between the post 13 and in the fitting 9, may be of any other shapes provided the fitting 9 can ride up the post 13 only when the door 12 is properly shut. The arrangement may be applied to a downstroke press, in which case the post 13 will be'held by a spring, for example, to prevent it operating the valve 1 under its own weight. In a modification, the door 12, Fig. 6, is slidable over the opening to the press, and has a holed sleeve 18 near its lower end slidably engaged on the post 13, and on the opposite side lugs 19, 20 slidably engaged on a post 21 secured to the movable part of the press. The post 13 is provided with ratchet teeth 23 and is connected to the part 11 by a set screw adapted to slip if the post is subjected to pressure from the moving part of the press. The lower end of the post 13 passes through a hole in a fitting 25 on the movable part 10 of the press, on which is pivoted a bell-crank lever 26, one arm of which carries a weight 27 and the other has a pawl 28 co-acting with the ratchet teeth 23, and a cam projection 29 co-acting with the sleeve 18 of the door. When the door is fully closed, the lower end of sleeve 18 engages the cam projection 29 and rocks the bell-crank lever 26, against the weight, to lift the pawl 28 out of engagement with ratchet teeth 23. When the moving part 10 rises, therefore, the post 21 and door 12 rise with it while the post 13 remains stationary. If the door is not properly closed, i.e., sleeve 18 free of the cam projection 29, the weight 27 rocks lever 26 to engage pawl 28. The post 13 will be locked to the moving part 10 and will open the valve 1 and stop movement of part 10 of the press.
Patent GB-995233-A (GB)
Title: Improvements in and relating to epicyclic change speed gears
IPC: F16H3/66
Filed: 1964-05-20
Abstract: 995,233. Epicyclic gearing. ZAHNRADFABRIK FRIEDRICHSHAFEN A.G. May 20, 1964 [June 6, 1963], No. 20863/64. Heading F2D. A three-speed and reverse epicyclic gear comprises first and second sun wheels Z 1 , Z 5  and a ring gear Z 4 , with intermeshed planet pinions Z 2 , Z 3  on a common carrier ST connected to the output shaft 2, planets Z 2  meshing with the first sun wheel Z, and planets Z 3  meshing with both the ring gear Z 4  and second sun wheel Z 5 . Friction clutches A, B serve to connect the first sun wheel Z 1  and the ring gear Z 4  to the input shaft 1 and friction brakes C, D lock the ring gear Z 4  and second sun wheel Z 5  respectively. For first gear clutch A and brake D are engaged, for second gear clutch B and brake D are engaged, for direct third gear clutches A and B are both engaged, while for reverse drive clutch A and brake C are engaged. A torque converter and one-way clutch may be mounted ahead of the epicyclic gear and a one-way brake arranged in parallel with brake D, Fig. 5 (not shown).
Patent GB-1309812-A (GB)
Title: Closure caps for pipes
IPC: B65D51/00
Filed: 1970-05-01
Abstract: 1309812 Caps for closing pipe ends DOVER CORP 1 May 1970 [2 May 1969] 21082/70 Heading F2P A cap 14 for closing the end of a pipe comprises a number of pivoted arms (as shown two arms 19, 23) spaced symmetrically around the periphery of the cap and means for simultaneously moving both or all of the arms to a position in which they fasten the cap to the pipe. As shown, each arm is connected by a link 29 to a handle 28 slidable on a boss 30 upstanding centrally from the cap. On depressing the handle, the free ends of the arms engage a surface 2, 6 of the pipe. In the fastened position, an overcentre condition exists in which pivots 32, 36 are nearer the cap than pivots 33, 37. A sealing gasket 15 is held within the cap by a ring 16. Apertures 43, 44 may receive a locking means when the cap is fastened.
Patent GB-465018-A (GB)
Title: Improvements relating to variable speed gear
IPC: F16H3/08
Filed: 1936-07-31
Abstract: 465,018. Automatic change-speed gearing. STEVENS, F. July 31,1936, No. 21186. [Class 80 (ii)] [Also in Group VIII] Change speed gearing operates automatically to change the ratio in response to torque changes by cam and spring-plunger clutches which slip on overload. Spring plungers a<7>, Fig. 2, sliding in a load wheel A<4> will resist the relative turning of a driving-cam a<5> so that a limited torque is transmitted to the wheel A<4>, the limit being reached when the cam turns under the plungers. Thus when the load on a driven shaft B, Fig. 1, is heavy, slip clutches C, D, E, F all yield, and a positive drive is transmitted from a pinion A<1> fast on a driving- shaft A to a wheel B<1> connected to the shaft B by a one-way clutch b<1>. The central cam a<5> of the clutch C is rigid with the pinion A<1> so that a torque is transmitted through the clutch C as it slips to a wheel A<2> and from that to a wheel B2 and one-way clutch b<2> tending to drive the shaft B faster. If the load falls, this clutch b<2> picks up the drive and the pair A<1>, B<1> overruns at b<1>. The next slip clutch D is transmitting a torque as it slips through the next pair A<3>, B<3> and the next one-way clutch b<3> which picks up the drive when the load is suitable, the clutch b2 of the second pair also overrunning. With the load sufficiently relieved, the drive passes through the slip clutches C, D, E, F in succession and through a pair A<5>, B5 and one-way clutch b<5> yielding a fifth and highest speed. A light gear device for a pedal cycle is described with reference to Figs. 9 and 10 (not shown). A heavier form suitable for a motor vehicle is described with reference to Fig. 7 (not shown). A two-speed form for driving a domestic wringer is described with reference to Fig. 8 (not shown).
Patent GB-757202-A (GB)
Title: Xylenol-formaldehyde resin based shaped constructional members for industrial use
IPC: C08G8/00
Filed: 1952-08-22
Abstract: Compositions suitable for moulding structural elements for use, for example, in chemical engineering, comprise a mixture of a xylenolformaldehyde resin and a chlorhydrin, trimethyl or triethyl phosphate or chloral hydrate or any mixture thereof in a proportion of from 5 to 15 per cent by weight of the resin. Fillers, e.g. graphite, silicon carbide, talc, barium sulphate, quartz, may be included, other resins, e.g. polyvinyl chloride and polystyrene, and hardeners such as sodium bisulphate, phosphoric acid, lead dioxide, manganese dioxide, persulphates, titanium sulphate, benzene, p-toluene and b -naphthalene sulphochlorides, naphthalene disulphodichloride, 1,5-naphthalene disulphonic acid and diethyl and dipropyl sulphates.  The moulded products show superior chemical resistance and with conductive fillers, good thermal conductivity. In the moulding process thermoplasticity is retained for long periods.  Examples describe compositions based on a xylenol-formaldehyde resin from a commercial xylenol, hardeners, graphite or talc as fillers and (1) to (3) epichlorhydrin, (4) dichloropropanol, (5) triethyl phosphate, and (6) chloral hydrate. The compositions are hot-moulded into dished members or tubes, remaining in the hot-press for 1 minute for each 1 mm. thickness in the article being produced, and after-hardened, e.g. at 120-160 DEG C.  Afterhardening can also be effected in the cold if a hardener is included in the composition. Glycol chlorhydrin is included in the composition of Example 2 and polystyrene or polyvinyl chloride in the compositions of Examples 3 and 6.
Patent GB-1219579-A (GB)
Title: Improvements in anchorage devices for wires or rods
Inventor: JARNECKI TADEUSZ STEFAN
IPC: E04C5/12
Filed: 1967-05-08
Abstract: 1,219,579. Anchoring wires. P. S. C. EQUIPMENT Ltd. 29 April, 1968 [8 May 1967], No. 21202/67. Heading D1T. An anchorage device for wire rope, strands or rods 12 comprises an internally tapered housing 1, a deformable tapered bush 4 having a slit 7 at its tapered end and a deformable sleeve 9 surrounding the wire and fitting within a bore in the bush 4. The device is assembled by fitting the housing 1, the bush 4 and the sleeve 9 onto the wire, swaging the sleeve and the non-tapered part of the bush onto the wire, then fitting the bush into the housing so that the unswaged part of the sleeve will also grip the wire, There may be two slits in the bush. The sleeve may be longitudinally split and have internal teeth angled away from the tapered end of the bush. The housing 1 may have the same number of tapered holes as the number of strands in a tendon which it anchors, each strand being gripped in a hole, see Fig. 7, not shown. The device may be used in coupling two tendons, the housings being joined by a coupling cylinder, see Fig. 9, not shown.
Patent GB-1122823-A (GB)
Title: Improvements relating to dispersion strengthened lead
Inventor: ROBERTS DAVID HENRY
IPC: C22C32/00
Filed: 1965-05-19
Abstract: A process for producing dispersion strengthened lead comprises intimately mixing lead powder and a refractory oxide powder in an oxidizing atmosphere, reducing the majority of the lead oxide content and subjecting the mixture to a forming process (e.g. extrusion). The mixing is preferably carried out in a ball mill and the refractory oxide is preferably alumina in an amount of 0.1 -10 vol %.
Patent GB-225266-A (GB)
Title: Planing machine for wood block paving
IPC: B24B7/18
Filed: 1923-08-22
Abstract: 225,266. Storer, G. H. Aug. 22, 1923. Planing.-In a machine for planing or levelling roads, floors or other surfaces, a cutter roller 10, continuous or divided, is rotated oppositely to the supporting wheels of a vehicle 1 and is adjusted by means of separate handoperated worms 18 acting on the ends of a bar 5, so as to provide vertical or angular adjustment of the roller 10, and the connecting arms 4 are arc-shaped, so that the drive is not affected. Several such cutter rollers may be arranged in echelon, with a helical conveyer for dust or chips.
Patent GB-1483957-A (GB)
Title: Diphenylmethane diisocyanate compositions
IPC: C08G18/00
Filed: 1975-05-19
Abstract: 1483957 Polyurethanes IMPERIAL CHEMICAL INDUSTRIES Ltd 3 May 1976 [19 May 1975] 21293/75 Heading C3R Polyurethanes are prepared using as the polyisocyanate component a diphenylmethane diisocyanate composition comprising (i) diphenylmethane diisocyanate, (ii) a diphenylmethane diisocyanate uretonimine group-containing derivative, (iii) a reaction product of diphenylmethane diisocyanate and a diol of M.W. less than 175 and (iv) optionally not more than 10% by weight of methylene bridged polyphenyl polyisocyanates of isocyanate functionality higher than two, the composition having an isooyanate functionality of not more than 2À3. The composition may be prepared by blending the separate components or preferably by mixing a solution of component (ii) in component (i) with a diol under such conditions that urethane formation but no other reaction takes place. Liquid diphenylmethane diisocyanate compositions are obtained which are useful in the preparation of polyurethanes in the form of surface coatings, foams and elastomers.
Patent GB-995878-A (GB)
Title: Semi-conductor devices
IPC: H01L29/00
Filed: 1962-06-04
Abstract: 995,878. Semi-conductor devices. INTERNATIONAL BUSINESS MACHINES CORPORATION. June 4, 1962 [June 23, 1961], No. 21383/62. Heading H1K. A semi-conductor device comprises a PN junction on one side of which the uncompensated impurity concentration first increases with distance to a maximum at a point within the zero bias space charge region and then decreases to a constant value. On the other side of the junction there is a similar distribution or else uncompensated concentration increases with distance to a constant value representing a resistivity several times lower than that of the constantly doped region on the one side. In a diode of this type the built-in field or fields thus provided sweep minority carriers away from the junction thereby reducing switching time. A typical device is made in the sealed apparatus shown in Fig. 4 on a P-type germanium substrate 11 as follows. Initially the temperature distribution maintained by coils 8A-8C causes P-type germanium 9 to react with iodine vapour in the tube and be deposited on the substrate. The distribution is then altered so that while the deposition continues an accumulation 13 of heavily doped P germanium is formed at the end of the tube. Subsequently when the distribution is again altered to transfer N material from body to the substrate this accumulation is preferentially transferred to produce a heavily doped P region adjacent the PN junction which is then formed. A device with retrograde doping distribution on both sides of the junction is made by a modification of this process which is described in detail.
Patent GB-328864-A (GB)
Title: Improvements in folding knives
IPC: B26B1/04
Filed: 1929-07-11
Abstract: 328,864. Anderson, H. A. July 11, 1929. Hinged and folding handles. - The folding casing of a knife blade 1 comprises arms 4 pivoted to the stock of the blade, the other end of each arm being pivoted to an arm 6 slightly longer and wider than the arms 4 and adapted to enclose them in the open position, Fig. 3. The other end of each arm 6 is pivoted to a guard member 7 through which the blade slides and which may be lined with frictional material e.g. a compound of asbestos to clean, sharpen and polish the blade. In the closed position the blade is completely enclosed and in the open position, Fig. 3, the arms form a handle, locking means for either position comprising a clamping member 15 pivoted to an arm 6. Fig. 2 shows the knife half-opened. The guard 7 and locking member 15 have symmetrical protective projections 12, 19, of ornamental shape amd a chain 13 is mounted on the projections 12.
Patent GB-265083-A (GB)
Title: Improvements in spring washers
IPC: F16B39/24
Filed: 1926-08-31
Abstract: 265,083. Loutrel, C. H. Aug. 31, 1926. Locking nuts.-In a helical spring washer having parallel upper and lower faces, the inner circumference departs from the plane to which the washer is ultimately compressed a distance greater than does the outer circumference. The pitch of the helical line representing the inner circumference will thus be greater than that of the outer circumference. The parallel surfaces are inclined upwardly from the outer to the inner circumference.
Patent GB-1009439-A (GB)
Title: Purine derivatives and processes for their synthesis
IPC: C07J41/00
Filed: 1962-06-04
Abstract: The invention comprises compounds of the formula <FORM:1009439/C2/1> and tautomeric forms thereof wherein R is -NH2, -NH.CH2CH=C(CH3)2, -N[CH2 CH=C(CH3)2]2 or -SCH3 and which when R is -NH2 contain a 9-(g ,g -dimethylallyl) group and when R is -SCH3 contain a 7-(g ,g -dimethylallyl) group and which may contain a 3(g ,g -dimethylallyl) group when R is -NH.CH2CH=C(CH3)2; the preparation of the 6-methylmercapto compound by reacting a g ,g -dimethylallyl halide with 4 - methylmercapto - 5 formamido - 6 -amino - pyrimidine (prepared by formylation of the corresponding 5-amino compound) and cyclizing the #N-(4-amino-6-methylmercaptopyrimidine - 5 - yl) - #N - (g ,g  - dimethylallyl) - formamide product, for example by heating in caustic potash solution; the preparation of the 6-(g ,g -dimethylallylamin or bis-g ,g -dimethylallylamino)-3-unsubstituted compound by heating 6-chloro-purine with g ,g -dimethylallylamine or bis-(g ,g -dimethylallyl)-amine, or, for the 6-mono-substituted amino compound, by reacting adenine hydrochloride with g ,g -dimethylallylamine; the preparation of the 6-amino compound by reacting adenine with a g ,g -dimethylallyl halide in a solvent and in the presence of sodium hydride; and the preparation of the 6-(g ,g - dimethylallylamino) - 3 g ,g  - dimethylallyl compound by heating together 7-(g ,g -dimethylallyl) - 6 - amino - purine, g ,g  - dimethylallylamine and a halide salt thereof.  The invention also comprises the preparation of the lastnamed purine derivative by reacting 4,6-diamino-5-formamido - pyrimidine (prepared by formylation of the 4,5,6-triamine) with a g ,g -dimethylallyl halide and cyclizing the product (for example by heating in caustic potash solution); and the preparation of 8-(g ,g -dimethylallyl)-adenine by reacting 4,5,6-triaminopyrimidine with pyroterebic acid to form 4,6-diamino - 5 - pyroterebamidopyrimidine and cyclizing this, e.g. by heating at 260 DEG  C. Examples are given.  Bis - g ,g  - dimethylallylamine is prepared by reacting ammonia with g ,g -dimethylallylamine.  Specification 948,485 is referred to.
Patent GB-299290-A (GB)
Title: Process for the distillation of coal tar
IPC: C10C1/04
Filed: 1928-07-24
Abstract: 299,290. Weasel, C. July 24, 1928. Addition to 273,675. Hydrocarbons, distilling.-The process for distilling tar and recovering naphthalene therefrom described in the parent Specification is modified in that the tar is first heated indirectly to 180‹ C. to drive off water and light oils, and the heating is then discontinued while the naphthalene is distilled off by the direct mechanical action of steam injected into the tar at a temperature below 215‹ C. The process may be made continuous by heating the tar to 180‹ C. in a separate vessel and continuously feeding it to a second vessel into which steam is injected. Specification 100,493 also is referred to.
Patent GB-727817-A (GB)
Title: Improvements in ventilators
IPC: F24F7/02
Filed: 1952-08-26
Abstract: 727,817. Ventilators. O'HEA, I. J. Aug. 26, 1953 [Aug. 26, 1952], No. 21454/52. Class 137. A ventilator adapted to be secured over an opening in the roof of a building to be ventilated comprises a rectangular throat 15 formed of two outwardly facing channels 11 and two end plates 16, which support side baffles 23, a cover member 18 comprising two flaps 19, 20 being disposed above the throat. The flaps 19, 20 are pivotally mounted on separate hinges 27, or on a common hinge, not shown, suitable sealing means being provided to cover the adjacent edges of the two flaps. In the absence of such sealing means a gutter 31, Fig. 4, fixed between the end plates 16, communicates with transverse side gutters, not shown, to drain away leakage water. The flaps 19, 20 may be counterbalanced, e.g. by arms 30 attached to the pins of the hinges 27. For operating the flaps the pins of the hinges 27 are fitted at their one ends with bell crank levers 28 which are connected to a cable 29 to a point of operation, within, or exterior of, the building. The flaps 19, 20 may be operated together, or independently, by suitable mechanism, e.g. electric or mechanical apparatus which may be controlled by a thermostat. Upturned lips may be formed along the free edges of the flaps 19, 20 which may be of arcuate section. In an alternative arrangement the flaps 19, 20 are hinged along their outer edges to the upper flanges of the channels 11, the inner edges of the flaps when closed, meeting above a drain channel. Specifications 567,801 and 610,934 are referred to.