baber/WOPTO huggingface dataset:
Patent GB-777947-A (GB)
Title: Improvements in or relating to fluid pressure controlling means
Inventor: HOBBS JAMES GILBERT
IPC: G05D16/20
Filed: 1954-02-09
Abstract: 777,947. Measuring liquid level electrically. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Jan. 26, 1955 [Feb. 9, 1954], No. 3850/54. Class 40 (1). [Also in Groups XIX, XXIX and XXXV] The level of liquid in a chamber 6 representative of the pressure of gas in a waveguide W, is sensed by a float F which actuates the moving contact arm of a variable rheostat P forming one limb of a Wheatstone bridge B. A recording millameter M connected across the bridge provides a continuous indication of the gas pressure.
Patent GB-982617-A (GB)
Title: Improved unit for filtering dust-laden air
Inventor: BAXENDALE RICHARD HENRY
IPC: B01D46/04
Filed: 1963-01-31
Abstract: In a dust collector unit the contaminated air is passed through filter bags inwards through the filter walls and the dust collected in a tray beneath the filters.  Dislodgment of dust from the filter outer surface is effected by a flexible mattress within each filter bag which may be vibrated by a mechanism coupled to a handle external to the unit case.  The vibrating mechanism extends into the bags through the open end and is in the clean air side. The bag open end is vertical and the contaminated air passes downwards over and between the bags and then through the walls so as to emerge, cleaned, through the vertical outlets.  The collecting tray is undisturbed by air flow.  Specifications 905,113 and 982,618 are referred to.
Patent GB-726980-A (GB)
Title: Improvements in or relating to vibratory assembly
Inventor: COOK EUGENE BERTRAM
IPC: B06B1/16
Filed: 1953-02-12
Abstract: 726,980. Vibratory mechanism. ALLISCHALMERS MANUFACTURING CO. Feb. 12, 1953, No. 3969/53. Class 80 (4). A vibratory mechanism, applicable to gyratory sifters, comprises a pair of rotatable weights whose radial and axial positions are controlled by cams so that the weights are moved centrifugally to eccentric, vibration-producing positions only at speeds above the critical frequency for the sifter, the extent of eccentricity being adjustable to vary the magnitude of vibration, while the axial height of the weights is adjustable to bring their centre of gravity into the same plane as that of the material being vibrated. The mechanism shown is arranged symmetrically between material-receiving units 7, the assembly being suspended by rods 11, or supported on springs or rubber blocks. Two weights 25 are each carried by upper and lower arms swingable about and slidable on respective shafts 18, which two shafts are fixed in carriers secured to a driving shaft 12. On each weight is an arm 28 carrying a follower engaging a cam 34 on the shaft 18, each cam comprising a helix merging into a longitudinal surface so that as the speed of shaft 12 rises each weight 25 moves outwards and upwards to a piston determined by the longitudinal surface. An adjustable bolt on the arm 28 abuts shaft 12 to limit the inward movement of each weight. Intermeshing gear segments are secured to the weights to ensure their swinging in unison. The two cams are free on the shafts 18 and rest against a bracket 20 interconnecting shafts 18 and 12, the two cams being adjustably interconnected by a bar 37 allowing variation of the magnitude of the vibrations. The bracket 20 may be adjusted along the shafts 18, 12 in order to vary the height of the weights 25. A pair of bolts 44 are provided to raise the weights while adjustments are made.
Patent GB-416829-A (GB)
Title: Improvements in a method and apparatus for rolling tapered metal articles
IPC: B21H1/02
Filed: 1934-02-07
Abstract: 416,829. Rolling discs. INGERSOLL, R. C., and BATTLES, S. S., 310, South Michigan Avenue, Chicago, U.S.A. Feb. 7, 1934, No. 4088. [Classes 83 (iii) and 83 (iv).] Tapering ; indexing.-A disc is fed in to rolls 5 by a reciprocated carriage 7, the rolls 5 rolling a segment of the disc and at the same time feeding it back until at the next forward feed of the disc it is indexed to bring a fresh segment between the rolls, indexing being arranged so that after one complete revolution has been rolled, the re-rolling of each segment overlaps the previously rolled segment. The polygonal stud 8 carrying the disc is indexed by chain drive from the shaft 14 as follows ; feed in motion of the slide 7 causes a pawl 21 to rotate a loose ratch ring 20 carrying another pawl 28 which engages the ratchet teeth 27 of a braked drum 15 on the shaft 14 which is thereby indexed. After one complete revolution the pawl 28 is held out of engagement in one position with one of the teeth 27 by a cam screw 31 so that there is some slip in the indexing of the disc so that each segment rolled overlaps the previous segment. The carriage 7 is reciprocated by a lever 42 oscillated by a crank pin 45 working in a slot 44a of the lever, the coupling allowing the carriage to be freely returned by the action of the roller on the disc until the coupling again takes up the return of the carriage. The crank pin 45 is rotated by a shaft 47, Figs. 9 and 5, the shaft 47 being driven from a chain driven sprocket 49 through a clutch 53, 50. The sprocket 49 and clutch sleeve 50 are coupled together but are loose on the shaft 47. The clutch is disengaged automatically after a selected predetermined time as follows. A gear 59 keyed on the shaft 47 drives the gear 60 of a layshaft 61, and splined gears 62, 63, Figs. 5 and 6 can be moved along the layshaft 61 to engage with either of the stepped gears 68, 67, or 66 so that the sleeve 69 can be driven at different speeds and the worm wheel shaft 74 driven by the sleeve 69 and worm wheel 73 may thereby be driven at different speeds. A disc 75 on the shaft 74 carries a cam 76 which withdraws latch block 77 and allows the clutch control 90 to be elevated to disengage the clutch part 58 and stop the rotation of the feed shaft 47. To start the machine the foot pedal 95 rotates shaft 87 drawing the clutch control 90 and plunger arm 83 down. A spring will then throw in the clutch 58 and the spring 80, Fig. 6, will slide the latch 77 to the right over the plunger arm 83 and bring the cam thereon into the path of the cam 76 on disc 75. To stop the machine in case of emergency or accident the lever 96 is depressed, Fig. 6, to withdraw the latch 77 and allow the spring 94 to move the pawls 89, 90 to throw out the clutch. Friction pads on the stationary parts retard the slide 22 at each end of its stroke. The working segments 5 of the roller are triangular to roll a triangular segment of the disc.
Patent GB-1514201-A (GB)
Title: Rotational moulding
IPC: B29C41/04
Filed: 1976-04-29
Abstract: 1514201 Road marker cones ADAPTAFORM PLASTICS Ltd 29 April 1976 [30 Jan 1975] 4093/75 Heading E1G [Also in Division B5] A PVC, polyethylene, polypropylene or ethyl vinyl acetate road cone comprises a cylindrical, conical or rectangular hollow body with a closed cross-section hollow bead at its base. Figure 1 shows a mould 2/7 in which the body and bead are deposited. Mould projections 10 define a weakened zone for removal of the cone base. The bead is filled with sand.
Patent GB-893774-A (GB)
Title: Improvements in the production of difficultly inflammable polystyrene and styrene-containing copolymers
IPC: C08K5/02
Filed: 1961-02-03
Abstract: Polymers of styrene are rendered flame-resistant by the addition of bromine-containing saturated or unsaturated compounds containing twelve-membered carbon rings.  The specified compounds are tetrabromocyclododecene, dibromocyclododecane, tribromocyclododecane, dibromocyclododecene, bromodichlorocyclododecene and tetrabromodichlorocyclododecane. Stabilizers for the bromo compounds also may be present and specified are dibutyl tin, styrene oxide and epoxides.
Patent GB-845918-A (GB)
Title: Improvements in fluid pressure relief valves
IPC: E21D15/51
Filed: 1957-02-06
Abstract: 845,918. Hydraulic pit props. DOWTY MINING EQUIPMENT Ltd. Feb. 6, 1957, No. 4122/57. Class 20(2) [Also in Groups XXIII and XXIX] The ram 2 of a pit prop accommodates a manually operable pump piston 6 and a relief valve 9 comprising an hexagonal housing 12 having bores 13, 14 connected via a smaller diameter bore 16 which acts as a valve guide; an annular valve seat 19 and seal 23 is held against the inner end of bore 14 by a threaded member 21 sealed in the ram by a rubber element 26. In the bore 16 is a valve carrier 17 with external flats for the passage of liquid into the bore 13, the carrier enclosing a ball valve 18 and incorporating a stem 28 about which is disposed a flanged carrier 29 for a spring 34, the upper end of the spring carrier 29 fitting into a nut 33 in the top of the bore 13. The relief valve assembly is a push fit in the appropriate bore of piston 6 and together with a ram seal 4 and a non-return valve 7 is held in place by a sheet steel stamping 27. The prop is extended by operating the piston 6 which draws liquid from within the ram and forces it past a non-return valve 7 to the space beneath the ram. Should the roof loading increase the pressure of liquid beneath the ram will rise until it is equal to the loading of the spring 34 whereupon the ball 18 is lifted and allows a small quantity of liquid from a passage 22, that opens into the ram pressure space, to pass through the valve seat 19, bore 13 and an orifice 35 into the ram interior. The ball 18 is now reseated by the action of its spring 34 and the pressure increase in bore 13 due to the small section of orifice 35. The operational pressure level of the valve is set by adjusting the nut 33, which is then locked in position by burring over the threads in the outer end of bore 13. A special tool is provided to ensure accurate alignment of the seat 19, which tool consists of an hexagonal tube 36, Fig. 2, that supports a spigot 37 through a bush 38 and a transverse bar 39; the spigot 37 has three diameters 41, 42 and 43, the smallest being an accurate fit in the seat bore whilst the other two diameters are a sliding and force fit, respectively in the bore 16. The tube 36 also prevents rotation of the housing whilst the hexagon end member 21 is tightened by a spanner. Specifications 700,790 and 753,532 are referred.
Patent GB-671934-A (GB)
Title: Improvements in and relating to process and apparatus for the thickening of suspensions or the like and also for the separation of solids according to specific gravity by means of the float and sink method
IPC: B04C11/00
Filed: 1949-02-15
Abstract: 671,934. Centrifugal-separators; washing granular material. MAATSCHAPPIJ VOOR KOLENBEWERKING STAMICARBON N.V. Feb. 15, 1949 [Feb. 16, 1948], No. 4147/49. Classes 23 and 82(ii) [Also in Group XXIX] In a cyclone-separator one or both of the outlets is resilient so that the density of discharge may be controlled by adjusting the diameter of the outlet. In Fig. 3 (not shown), the outlet is a hole in a rubber block and the diameter corresponds to the axial pressure on the block. In the cyclone 8, shown in Fig. 1, the diameter of the outlet for the heavier fraction is adjusted by supplying fluid to an inflatable rubber ring 19. Diluted suspension from a sink-float washing-box 1 is pumped to the cyclone for concentration. The heavier fraction from the cyclone is led to a vessel 10 having means to measure liquid density. The density measuring means controls a valve 17 in a pipe 18 supplying fluid to the ring, the arrangement being that a fall or rise in the density of the fraction relative to a required density is respectively accompanied by decrease or increase in the outlet diameter. The suspension passes through the vessel 10 to a pivoted funnel 22 arranged to deliver to the washing-box if the suspension is at or above the required density or to return the suspension to the cyclone if the density falls below the required density. The lighter discharge from the cyclone washes the sieves 2, 3. In a modification the heavier discharge from the cyclone is led direct to part of the washing- box provided with density measuring means. Specifications 528,590, 608,026, 608,876, [Group XXIX], and 644,798 are referred to.
Patent GB-275873-A (GB)
Title: Improvements in thermostatic control apparatus
IPC: G01K5/32
Filed: 1927-02-15
Abstract: 275,873. Horne, A. D. Feb. 15, 1927. Thermostats. - A thermostat comprises a temperature-sensitive composition 2 of gutta percha and powdered charcoal packed into a tube carrying a valve 4 which coacts with a seating 13 formed in a casing adapted to be screwed into a radiator. One end of the tube is closed by a plug, and the other end is closed by a plunger 5 which abuts against a screwed stop 11. Leatherite washers 7 and an asbestos washer 8 are interposed between the plunger and the composition.
Patent GB-350891-A (GB)
Title: Improvements in cam grinding machine
IPC: B24B19/12
Filed: 1930-02-07
Abstract: 350,891. Grinding. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Norton Co. ; New Bond Street, Worcester, Massachusetts, U.S.A.) Feb. 7, 1930, No. 4215. [Class 60.] Disc apparatus.-A machine for grinding cams on a cam-shaft comprises a grinding-wheel 13 movable towards and from the work 28, and a work-table 15 movable along a base 11 by a hand-wheel 16 and carrying, on trunnions 23, 24 a rocking bar 22 provided with supports 31, 32 for the cam-shaft 28. The bar also carries, in axial alignment with the work, a master cam-shaft 30 having thereon a number of cams, which, by engagement with a roller 36 supported by a bracket 38 secured to the table 15, rock the bar to give the required form to the cam being ground, the roller being moved from one master cam to the next to grind the next cam on the shaft. The master cam is pressed against the roller by means of a spring 68 acting on a rod 57 and enclosed in a cylinder 63 carried by a bracket 60, the tension of the spring being adjustable by a threaded bushing 58 ; the rod 57 is pivoted to an arm 55 projecting from the bar 22. The master cam and the cam-shaft are withdrawn respectively from the follower and the grinding- wheel for moving to the next cam by means of a piston 71 in the cylinder 68, which piston engages a collar on the rod 57, and, when depressed by fluid pressure moves the rod 57 downwards and rocks the bar 22, release of the pressure again allowing the bar to be rocked by the spring 57 for engagement of the next cam with the follower. The admission and exhaust of fluid pressure from the piston are controlled by spring-closed valves in a casing 77 having an inlet 79, an outlet 87 to the piston and an exhaust outlet, the valves being actuated in timed relation to the movement of the work-table by a lever 100 pivoted at 101 and rocked by the contact of a roller 98 on the lever with dogs 96 on a bar 94 which moves with the work-table, the dogs being spaced to correspond with the spacing of the cams on the shaft; the dogs may be adjustable on the bar. When the bar 22 is rocked to remove the cams from the follower 36, this is moved to the next cam by a rack 124 and a pinion 128 driven, through gearing 130, 131, 135 by a star-wheel 137 moved by the dogs, the extent of rotation of the star-wheel being rendered equal for each movement of the table 15, since the master cams are spaced equally on the shaft 30, by a pawl 141.
Patent GB-346897-A (GB)
Title: Improvements in manually operated screw propelling mechanism for boats
IPC: B63H16/08
Filed: 1930-02-07
Abstract: 346,897. Propelling mechanism for boats. ROBINSON, L. H., 17, Arlington Park Mansions, Chiswick, London. Feb. 7, 1930, No. 4226. [Class 114.] Manually actuated propelling gear for boats comprises a flexible or rigid toothed rack member adapted to move in two directions and impart a uni-directional drive to the propeller on the transmission shaft of which are ratchet means engaging two toothed wheels one of which engages the rack directly whilst the second toothed wheel engages it through the intermediary of an intermediate wheel. The propeller shaft 10 is driven by bevel wheels 8, 9 from a vertical outboard shaft 6 which carries loosely at its upper end a pinion 24 but has a ratchet and pawl connection therewith; this pinion 24 gears with a circular rack 36. A second pinion 25 mounted above the pinion 24 and having a pawl connection with the shaft 6 gears with the rack 36 through an idler pinion 30. The rack 36 is oscillated over a support 32 and guided by rollers 34, the oscillating means comprising either ropes 43 or rods which pass forward along the sides of the boat and are adapted to be worked manually. The pawl and ratchet mechanisms mounted within the two pinions are arranged so that the oscillating rotation of the rack 36 produces a one-way rotation of the propeller shaft. The shaft 6 is carried by casing 5 which at its upper end has a worm wheel 23 adapted to be moved through a worm 21 and shafting from the handing wheel 58. Adjacent to the handing wheel and driven thereby is an indicating disc 64 a small propeller 66 showing the position of the main propeller 11. In a modification a chain takes the place of a rigid rack and the toothed wheels are replaced by sprockets.
Patent GB-204737-A (GB)
Title: Improvements in gas rings and other like burners for heating
IPC: F24C15/10
Filed: 1922-11-14
Abstract: 204,737. Barham, H. G. F. Nov. 14, 1922. Portable gas stoves. - A gas cooking-burner is provided with stepped utensil supports having portions cut away to reduce the amount of metal employed, the treads of the steps being unequal in length and varying according to the type of burner used. The invention is shown applied to a ring burner in which case the length of tread decreases towards the outer side of the burner.
Patent GB-114334-A (GB)
Title: Improvements in Web Stretching and Guiding Device.
IPC: B65H23/02
Filed: 1917-03-26
Abstract: 114,334. Bolton, J. T., and Forsyth Dyeing-Co. March 26, 1917. Feeding a n d registering webs.- In apparatus for transversely stretching a n d guiding a web of paper or fabric on its passage to a printing, calendering, tentering, drying, or other machine, of the kind in which a single roller is disposed at each side edge of the web with its axis inclined to the run of the web, and the deviation of the web to either side is adapted to arrest the rotation of the corresponding roller, a part of the surface of each roller is made rough and a part smooth and the rollers are adapted to be arrested with their smooth surfaces in contact with the web. As shown in Fig. 1, the roller 21 is freely rotatable upon a shaft 18 secured to a bracket 17 on a pin 16 angularly adjustable in a bracket 14 to vary the inclination of the roller. The roller carries a bevel pinion 25 gearing with a bevel wheel 26 secured to a wheel 30 provided with three sets of radial feeler fingers 31 adapted to pass between a set of stationary fingers 32. The roller is rotated by the web and drives the wheel at such a rate that one of its sets of fingers pass the fingers 32 at each revolution of the roller and at the moment that the smooth part of its circumference is presented to the web. The web is caused to lap round a part of the surface of the roller by means of a doubly-bent guide-bar 35 adjustably secured at one end to a bracket 37 on the shaft 18 and carrying at its other end a bracket 33 which carries the stationary feeler fingers 32. The roller 21 is preferably formed as two half cylinders secured together by screws, one half having secured to it a sheet of metal roughened by punching holes in it. Sand-paper pins or other suitable means may be used instead of the metal sheet and the roller may be solid. In operation, the rollers 21 are set at an inclination to give the desired stretch to the web, but if the web should be stretched beyond the predetermined amount, its edge moves into the path of the feeler fingers 31 and prevents their passage between the stationary fingers 32, thereby stopping the rotation of the wheel 30 and roller 21. As the web continues to be fed, but in contact with the smooth part of the roller, the edge again moves away from the fingers 31 and the rotation of the roller recommences. The fingers 32 may be provided with antifriction rollers. In a modification, the wheel 30 has only one set of fingers 31 but a driving gear 26 of the same size as the pinion 25 is employed. Tn another modification, the fingers 31 are carried by a conical flange on the end of the roller 21 and pass between fixed fingers arranged above the roller.
Patent GB-589321-A (GB)
Title: Improvements in or relating to pivotal joints or bearings
IPC: F16C27/06
Filed: 1945-02-21
Abstract: 589,321. Bearings. SILENT BLOC, Ltd., and TRIER, V. A. Feb. 21, 1945, No. 4398. [Class 12 (i)] [Also in Group XXXII] A pivotal joint or bearing adapted to withstand appreciable end thrust comprises an outer sleeve D which houses an inner sleeve E through the intermediary of a rubber bushing F bonded or adhering under compression to the sleeves, such inner sleeve having a bore with a self-lubricating surface for the pin or spindle to be supported therein and also having end flanges G to engage against end flanges F<2> of the rubber bushing which in turn lie against the ends of the outer sleeve D. The inner sleeve E may be of a self lubricating moulded plastics material and is shown mounted in the outer housing sleeve D by two flanged rubber bushes F, F<1> inserted under compression at each end. According to the Provisional Specification the inner sleeve may be partly metal and partly of lubricant-impregnated plastics material.
Patent GB-687226-A (GB)
Title: Orthodontic locking device
Inventor: RUSSELL HARRY JOHN
IPC: A61C7/28
Filed: 1951-02-23
Abstract: 687,226. Regulating teeth. BAKER & CO., Inc. Feb. 23, 1951, No. 4447/51. Class 81 (ii). An orthodontic lock comprises a locking member 7 provided witl vertical bevelled sides 19, 20, an aperture 8 and a groove 21 intermediate said sides 19 20 and a lock base ( having vertical bevellec sides 14, 15 engageable with the bevelled sides 19, 20 of the locking member 7, an end portion 12 for restricting vertical downward movement of the locking member 7 and retaining means 17 engageable with the groove in the locking member 7 and limiting vertical upward movement of the locking member 7, the lock base 6 having a groove 18 transverse to the locking member 7 for containing an arch bow wire. The retaining member 17 may be in the form of a pin placed in position after the locking member 7 and lock base 6 have been assembled, or the retaining member 17 may be in the form of a projection integral with the lock base 6 in which case, the extended portion 12 of the lock base 6 is bent back to allow insertion of the locking member 7 within the lock base 6. After assembly the lock base 6 and locking member 7 are soldered or otherwise secured to a tooth band 3 in a modification (not shown) the end portion 12 is extended downwardly so that in assembled position the locking member 7 frictionally engages the extended portion. In other modifications (not shown) the end portion 12 is dispensed with and a retaining pin or pins serve to limit both upward and downward movement of the locking member. Specification 450,553 is referred to.