baber/WOPTO huggingface dataset:
Patent GB-680185-A (GB)
Title: Improvements in wide angle objectives
IPC: G02B13/04
Filed: 1951-02-01
Abstract: 680,185. Optical objectives. VERKAUFSAKT.-GES., H. WILD'S GEODATISCHE INSTRUMENTE. Feb. 1, 1951 [Feb. 13, 1950], No. 2571/51. Class 97 (i). A wide-angle objective particularly for photography or projection consists of six airspaced components of which the two middle ones are convergent with a diaphragm therebetween, and the two at either side thereof are divergent, the air spaces between the respective divergent components each having the form of a converging meniscus concave towards the diaphragm. Preferably the outer surfaces of the middle components are convex and are separated by an axial distance of between 0.6 F and 1.4 F, where F is the focal length of the objective, the central air-space being greater than 3 per cent F. Where the four divergent components are simple lenses the sum of their refractive indices does not reach 6.30. A nurnerical example is given of the lens shown in which the middle components are triplets, the refractive indices decreasing from element L 3  to element L 5  and from element L 8  to element L 6 . A numerical example is also given of a similar lens in which the front middle component is a doublet, i.e. the element L 5  is omitted.
Patent GB-351445-A (GB)
Title: Improvements in or relating to chairs or the like
IPC: A47C1/032
Filed: 1930-01-24
Abstract: 351,445. Rocking chairs. KNABUSCH, E. M., Box 231, Greenfield Avenue, and SHOEMAKER, E. J., 312, Telegraph Road, both in Monroe, Michigan, U.S.A. Jan. 24, 1930, No. 2583. Convention date, Jan. 24, 1929. [Class 52 (ii).] In a chair comprising a seat 5 movable horizontally relatively to the chair frame and a back member 15 slidably mounted on a back frame 16 hinged at 17 to the seat, the back frame 16 is connected to the chair frame by links 20 while additional links 30 interconnect the members 5, 15, whereby the members 15, 16 are adapted to move angularly and downwardly together, and at the same time relatively to each other, as the seat is moved horizontally forward. The seat 5 is shown supported by links 7 and a return spring 35 may be provided. By this construction, dragging of the clothes of the user as the position of the chairback and seat is altered is avoided.
Patent GB-510323-A (GB)
Title: Improvements in or relating to separation by froth flotation
IPC: B03D1/06
Filed: 1938-01-27
Abstract: 510,323. Froth-flotation processes. EARLE, T. Jan. 27, 1938, No. 2658. [Class 82 (ii)] Naturally occurring granular materials such as sands and sandstones to be purified by froth flotation concentration are first comminuted so as to liberate the constituent particles without rupturing the grains and the granular particles are separated from the slimes. The granular particles are then brought to the moist state, by which is meant a state in which the moisture content is in excess of that which the material will absorb from the air under normal atmospheric conditions but less than that necessary to produce water films of the maximum possible thickness on all the liberated particles ; no interstitial water must be present. The moist materials are then conditioned with flotation reagents, e.g., fatty acids or soaps, allowed to stand for a time if desired, and then transferred to the flotation cell, further reagents, e.g., frothers, being added if required. To bring the material to the moist state after desliming a dewatering treatment more drastic than draining, e.g., one involving evaporation, is necessary ; the dewatering may be controlled so that the desired water content is left in the material, or the material may be completely dried and the necessary water added. The process is particularly applicable to the purification of silica sands, sandstones &c. to be used in glassmaking. These sands may contain as impurities substances such as biotite mica, magnetite &c. which have a greater absorptive power for fatty acid reagents than pure silica and also discoloured particles and other substances having a less absorptive power than silica. In this case the moisture content of the sands after desliming may be so regulated, e.g., to 5 per cent., that only the silica and particles of lower absorptive power are filmed with water, the fatty acid is then absorbed to the mica &c. which is floated in the cell. The tailings are then dried and the water content adjusted to 0.1 per cent. which enables the pure silica to be recovered after a second conditioning. If the material contains readily floatable particles these may be floated directly after desliming, the tailings being then brought to the moist state, conditioned, and subject to flotation. Specification 510,322 is referred to.
Patent GB-210974-A (GB)
Title: Improvements in and relating to stands or supports for experimental mechanical apparatus
IPC: A47B37/00
Filed: 1923-01-30
Abstract: 210,974. Gussons, G. W., and Cussons, Ltd., G. Jan. 30, 1923. Teaching mechanics.- A stand or support for apparatus for conducting experiments in mechanics comprises a slotted bed 5, Fig. 3, mounted on supports 6 and provided with vertical end-posts 9 carrying cross-bars 10 between which are located rods 15 parallel with the bed, the apparatus being attached to the bed, end-posts, or rods 15 by blocks, bolts, or other securing devices. The cross-bars 10 are adjustable vertically on the posts 9 by screws 12, and are provided with a number of holes 13 and screws 14 for adjustably positioning the rods 15 which are interchangeable. The apparatus is attached to the end-posts 9 or the rods 15 by adjustable blocks 16. Fig. 4, provided at one side with a hook 18 and at the opposite side with an eye 19. The end-posts 9 may be replaced by upright T-pieces carrying at their upper ends parallel rods or a slotted plate.
Patent GB-1158185-A (GB)
Title: Polyisocyanate compositions modified by thermal treatment of tolylene-diisocyanate in the presence of organotin compounds.
IPC: C07C265/12
Filed: 1967-01-18
Abstract: 1,158,185. Polyisocyanate compositions obtained from tolylenediisocyanates. SUMITOMO CHEMICAL CO. Ltd. 18 Jan., 1967 [19 Jan., 1966], No. 2736/67. Heading C2C. The invention relates to a process for the preparation of polyisocyanate compositions which comprises heating at 150 to 250 C. in a dry inert atmosphere, e.g. nitrogen, in the presence, as catalyst, of one or more compounds represented by the general formulµ wherein R and R<SP>1</SP> are alkyl groups, a tolylenediisocyanate-tarry matter mixture obtained by the phosgenation of a tolylene diamine. The catalyst may be stannous octoate, stannous oleate, stannous acetate, dimethyltin distearate and dilauryltin diacetate and used in an amount of 0À1 to 2% preferably 0À5 to 1% by weight based on the toluylene diisocyanatetarry matter mixture.
Patent GB-900189-A (GB)
Title: Pneumatic tyre cover
IPC: B60C11/02
Filed: 1961-01-25
Abstract: 900,189. Replaceable tread tyres. GILBIERON, P. H. Jan. 25, 1961 [Jan. 28, 1960], No. 2865/61. Class 144 (2). A pneumatic tyre comprises a casing 1 the outer periphery of which is formed with a triangular section helical rib 3 forming a screwthread, and a replaceable tread band 2 formed with a complementary inner peripheral screwthread 4 whereby the tread may be removably screwed on to the casing. The inner peripheral diameter of tne tread band is less than the outer diameter of the casing, and to effect assembly the casing is first inflated with an inextensibe flexible metal ring 5 therein so that the inflation pressure spreads the side walls and the casing diameter is reduced sufficient to permit the screwing-on of the tread.
Patent GB-890103-A (GB)
Title: Improvements in or relating to apparatus for displacing slidable structures
IPC: F16H37/00
Filed: 1959-01-27
Abstract: 890,103. Friction couplings ; Bowden mechanisms. GOLDE & CO. G.m.b.H., HANS TRAUGOTT, GOLDE, H., and LOFFLER, M., [trading as GOLDE G.m.b.H. & CO. KOMM.- GES., HANS TRAUGOTT.]. Jan. 27, 1959 [Jan. 28, 1958], No. 2918/59. Classes 80 (2) and 80 (3). Power or manually-driven apparatus for displacing a slidable structure, such as a car roof, comprises an electric motor, driving through a coupling 2a and worm 3, a worm-wheel 4 secured to a shaft 16 which drives, through a friction slip coupling comprising spring washers 6, 6a adjustably loaded by a nut 17, a freely mounted gear-wheel 5 meshing wheel 7 on a parallel shaft 8, carrying toothed wheels 11, 12 meshing helically ribbed guided cables 14, 15 which latter are thereby moved in opposite directions to slide the roof. The friction coupling 6 slips when the roof encounters excessive resistance, whereupon the motor may be switched off automatically, or when, for emergency manual operation, the shaft 8 is directly turned through a detachable handle 22 applied to a bevel pinion 20 meshing bevel teeth 19 on the wheel 7. The cable-drive wheels 11, 12 are frictionally clamped to their shaft 8 by a screw 13, slackening of which permits cable adjustment.
Patent GB-1073845-A (GB)
Title: Method and apparatus for copying planar originals
IPC: G03B27/52
Filed: 1966-01-21
Abstract: 1,073,845. Electrophotographic copying apparatus. R. RODENSTOCK [trading as OPTISCHE WERKE G. RODENSTOCK]. Jan. 21, 1966 [Jan. 27, 1965], No.2940/66. Headings G2A and G2H. In apparatus for optically copying a stationary planar original on to a moving image receiving member 7, e.g. an electrostatically chargeable image drum, by scanning the original strip by strip, the original lies on a glass plate 1 and is scanned by a moving mirror 2, shown in its extreme positions 2a, 2b, light therefrom passing through a prism 3 and a fixed objective 4 into the drum 7 where it is reflected by mirrors (5), (6) Figs. 2, 3 (not shown) on to the inner surface of the drum. The original is positioned so that the line thereof being scanned is perpendicular to the axis of the drum. The mirror (6) is inclined so that the inclination of rays reflected therefrom to the normal to the drum surface is equal to the inclination of the rays into the mirror 2 from the original to the normal to the surface thereof. If this equality of angle is not attainable, a onesided distortion is avoided by a Brewster's prism arrangement, or by suitable selection of the velocity of rotation of the drum. In the embodiment shown, the mirror 2 is moved along one side of an equilateral triangle, the second side of which lies in the plate 1, the rays of light reflected by the mirror 2 being parallel to the third side. The objective 4 is corrected for the image scale, 1:1 in this embodiment. In another embodiment Figs. 4, 5 (not shown) the line to be projected is parallel to the axis of the drum (14), and a moving mirror (9) and Porro prism (10) transmit light rays from the original through a fixed objective 11 on to two mirrors (12), (13) and thence on to the drum. The prism (10) moves with half the velocity of the mirror (9). In a further embodiment Figs. 6, 7 (not shown) the Porro prism is replaced by a prism (17) with three, reflections. In a fourth embodiment Figs. 8, 9 (not shown) the mirror (9) is replaced by a penta-prism (23) moving twice as fast as the Porro prism (24).
Patent GB-121672-A (GB)
Title: Improvements relating to Boxes or like Receptacles.
Inventor: GRIFFIN ERNEST FEATHERSTONE
IPC: B65D3/14
Filed: 1918-02-19
Abstract: 121,672. Griffin, E. F., and Higgs, W. E. Feb. 19, 1918. Joints between box bottoms and bodies.-In a box &c. comprising a paper or like cylindrical body a secured in an annular recess in an endplate b, the inner vertical wall d of the recess is formed with a number of small indentations g arranged at intervals.
Patent GB-826051-A (GB)
Title: Improvements in pumps and compressors of the flexible-tube type
IPC: F04B43/00
Filed: 1957-02-01
Abstract: 826,051. Rotary pumps. SEYLER, L. A. Feb. 1, 1957 [Feb. 10, 1956], No. 3609/57. Class 110 (2). In a rotary pump of the flexible tube type the tube, Fig. 1, is provided with end flanges 2 and a longitudinally-extending serrated reinforcing ridge 4. Two such tubes may be mounted about a common casing, one tube constituting an auxiliary air pump for increasing or decreasing the pressure within the casing of the main pump and having a valve-controlled inlet port (see Fig. 3, not shown). In a modification, the tube is provided with a flange at one end whilst the other end is smooth or circumferentially grooved (see Fig. 4, not shown). The pump casing, Fig. 6, may constitute an aluminium casting 19 having recesses 21, 22 for the tube flanges and a toroidal chamber 20 having enlarged recesses 24, 25.
Patent GB-915352-A (GB)
Title: Apparatus and method for making pull-tab closures
IPC: B31D1/00
Filed: 1959-02-02
Abstract: 915,352. Pull-tab closures. IMPALCO FOILS Ltd., Feb. 2, 1959, No. 3654/59. Class 125(3). Apparatus for providing a disc closure with a pull tab comprises a conveyer 13 carrying closures 18, rollers 12 for feeding a strip of synthetic resin tape having an adhesive on one surface above the discs, a member 21 having heated shoes 20 to apply heat and pressure to seal the strip to the surface of the discs, a rotary cutter 22 with blades 23 to cut the strip as shown in Fig. 4, folding members 25 to bend the projecting part of the cut strip around the edge of the disc and further sealing elements 28 to apply heat and pressure to seal the strip to the underside of the disc. The strip is sealed to the top of the disc only at spaced intervals so that it may be easily pulled there-  from.
Patent GB-473123-A (GB)
Title: Improvements in or relating to photographic cameras with focal-plane shutters
IPC: G03B9/44
Filed: 1936-02-06
Abstract: 473,123. Photographic cameras. MAYO, A. C., and PURMA CAMERAS, Ltd. Feb. 6, 1936, No. 3684. [Class 98 (i)] A camera comprises a guide plate for the sensitive surface and a rigid slidable shutter plate working thereon, means to move the shutter plate to a set position, a release trigger and a safety shutter which is opened when the release trigger is pressed but is closed when the release trigger is let go. The camera of mouldable material comprises side plates 11, 12, front 13, and a lens mount 14 pressed by a spring 15. A guide plate 17 supports the film over the exposure aperture 18 by means of projections 28, 29, a spring 30 pressing the film on to the guides. The film extends between spool mountings 20, 21. Inwardly projecting ledges on the guide plate 17 support a shutter plate 37 which has an abutment 38 engageable when set by a trip member 39 formed on a flat spring 40. The shutter plate is connected by a hooked lever 49, 51 to a slotted lever 45 whereby it can be set by an arm 48 against the spring 44 and retained by the member 39. A release 41 slidable longitudinally displaces the trip member 39 to effect the shutter operation. A safety shutter-plate 54 is pivoted at 55 to the rear of the diaphragm plate 16 and is normally held over the diaphragm aperture by lugs 56. The release 41 has a projecting lug pivoted at 57 to arms 58, 59.on the plate 54, and when actuated, swings the safety shutter away against the spring 60, so that it uncovers the aperture just before the shutter release is effected. On the front of the shutter-plate 37 is mounted a smaller sliding plate 61 for varying the exposure slot. A heart-shaped cam acts on the edge of the plate 61 to move it to give three different widths of exposure slot corresponding to three different positions of the camera. A recess is provided in the safety shutter-plate to receive the back of the lens mount 14 to prevent operation of the shutter when a cap presses the lens back out of position. Specifications 32 /08, [Class 98], and 430,648 are referred to.
Patent GB-391930-A (GB)
Title: Improvements in or relating to dynamo-electric generators
IPC: H02K23/20
Filed: 1932-02-08
Abstract: 391,930. Dynamos; transformers. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Bergman, S. R.; 171, Willow Road, Nahant, Massachusetts, U.S.A.) Feb. 8, 1932, No. 3725. Convention date, Feb. 7, 1931. [Classes 35 and 38 (ii).] Exciting.-The field and armature circuits of a generator supplying a fluctuating load, for example, a welding arc 27, 28, are coupled together by an external magnetic coupling the effect of which is opposite to that between the circuits in the machine, the coupling comprising a primary winding 17 in series with the armature circuit, a secondary winding 18 in series with a field winding and a magnetic core structure for the windings having two magnetic circuits 19, 20 with air gaps 21, 22 in each circuit, the circuit 19 being common to both primary and secondary windings and carrying the main flux, and the other magnetic circuit 20 providing a leakage flux path about the primary winding. The generator is of the type described in Specification 159,374, [Class 35, Dynamoelectric generators &c.], and comprises a twopole armature 1 rotating in a four-pole field. Adjacent field poles 2, 3 and 4, 5 are of the same polarity. Field coils 9, 10 on the poles 3, 5 are connected across a main brush 6 and an auxiliary brush 8 and coils 11, 12 on the remaining poles are connected across the same brushes in series with a rheostat 15 and the transformer winding 18. The poles 3, 5 are substantially saturated so that the component RM of the armature reaction which acts in the same direction as the main field #M has no effect on the constancy of the field. The poles 2, 4 are unsaturated and the component RC of the armature reaction opposes the cross field #C so that the flux in these poles is variable. The poles 2, 4 may have tapped series opposing windings 13 and commutating poles 16 may be provided. The magnetic coupling described also furnishes the necessary series stabilizing reactance.
Patent GB-263332-A (GB)
Title: Improvements in and relating to driving and reversing gear
IPC: F16H3/60
Filed: 1926-02-09
Abstract: 263,332. Mooney, J. D. Feb. 9, 1926. Actuated or applied by driving-mechanism disengagers; band; energy-absorbing elements.-Reversing-gearing suitable for marine propulsion comprises a brake drum 17, which slides on a planet-carrying casing 8 to actuate a plate clutch 14 for solid forward driving, and which is held by a brake 41 for reversed driving. Upon the meeting surfaces of the drum 17 and brake band 41 are spiral grooves 17<b>, 41<a> which coact with lubricating oil in such a way as to help to withdraw the drum 17 to the right and disengage the clutch. The band 41 is supported at one end on a pivot 42, Fig. 2, and is normally held open clear of the drum 17 bv a spring 50. A tongue 41<c> about the middle of band is threaded on a supporting bolt 45<a> and is held down on a shoulder 45 by a spring 46. The band is tightened on the drum by thrust in a plunger 51. A control lever 31 through an arm 28 actuates the clutch control sleeve 26, and through a, cam 56, lever 52, and adjustable connection 54 operates the brake plunger 51.
Patent GB-232925-A (GB)
Title: Improvements in or relating to vertical film type evaporators
IPC: B01D1/06
Filed: 1925-02-11
Abstract: 232,925. Griscom-Russell Co., (Assignees of Sebald, L. E.). April 25, 1924, [Convention date]. Film evaporators.- Liquid is caused to pass from an upper section 1<c> in film form down the inner surfaces of tubes 2 passing through a steam-chest 1<b> by tubes 14 projecting into the upper-ends of the tubes 2 and having longitudinal or spiral fins or projections which hold them centrally. The tubes 14 serve also as vapour exits. A definite level of liquid is maintained above the tubes 2 by a float 22 controlling the steam-valve 22<a> of a turbine 9 operating a circulation-pump 10. The unevaporated liquid collecting in the base 1<a> is returned to the upper section 1<c> by the pump 10, together with an amount of fresh liquid admitted through a valve 23 controlled by a float in the base 1<a>. This float may also control a valve in the circulation pipe 8. When the liquid is not to be circulated a float in the base 1<a> controls a valve in the supply pipe to the uppec section, and excess of liquid is discharged from the base over a weir. The upper ends of the tubes 14 may be fitted in a tube plate, so as to form a separate liquid-inlet chamber which may be placed under pressure. Reference has been directed by the Comptroller to Specifications 3006/88, 22670/11, 28537/13, 131,365, and 154,355.
Patent GB-1093331-A (GB)
Title: Improvements relating to automatic pistols
IPC: F41A17/32
Filed: 1966-01-28
Abstract: 1,093,331. Automatic pistols. A. I. E. HELSENS. Jan. 28, 1966 [Jan. 28, 1965; Feb. 4. 1965], No. 3842/66. Heading F3C. An automatic pistol comprises a support 8 in which are pivotally mounted a trigger 1 and its associated seat 2, both being spring- loaded. In the cocked position the trigger 1 engages a spring-loaded plunger 3 housed in the sear and the sear engages a sliding breech block 10, the sear engaging a stop 9. A safety mechanism consisting of a catch 13 and push-button 14 holds the sear against the stop 9 when in the safety position. A second safety mechanism comprises a metal stop 15 which is actuated through a linkage to engage and hold the breech-block 10. The cartridge extractor is housed in the breech-block 10 (Fig. 2, not shown) and a cartridge ejector 18 is provided adjacent a magazine holder 17. A fire control mechanism is provided, a selector pin 11<SP>1</SP> of which projects to limit movement of the trigger 1 for automatic actuation of the pistol. For single shot actuation the selector pin is retracted (Fig. 3, not shown). In a modification the second safety mechanism comprises a guided plate which is operated by a cam pin mounted eccentrically on a lever, the cam pin also preventing movement of the trigger (Figs. 6, 7, not shown). Further the spring-loaded plunger is housed in the trigger. In this case the change fire mechanism is controlled by a push-button working in a slot in a cover-plate, the pushbutton being attached, through a linkage, to trigger engaging or non-engaging bush (Fig. 8, not shown).
Patent GB-195224-A (GB)
Title: Improvements relating to the treatment of milk particularly for ice cream manufacture
IPC: A23G9/40
Filed: 1922-02-09
Abstract: 195,224. Sanna, A. R. Feb. 9, 1922. Drawings to Specification. Ice-cream preparations.-Milk products, for use in the manufacture of ice-cream. or other foods, are obtained from milk or whey by bring- ing the casein and other albuminoids to the same physical state by heating or otherwise thereby causing them to cohere when coagulated, coagulating the mass by adding an acid and separating the liquid from the semi-solids, thereby eliminat ing the major portion of the milk-sugar. The proportion of milk-sugar in the product does not, therefore, exceed the proportion of milk-sugar in the original lacteal fluid. The milk or whey is delivered from a supply tank to a tank where it is mixed with sugar, and other ingredients if necessary, and is heated to 190-195‹ F. at which temperature the casein and other albuminoids are physically similar. The temperature employed varies with the age and character of the milk. The acid, being added, causes coagulation and the semi-solids float or precipitate, according to the character of the milk, permitting separation of the whey. The mass then passes, through preliminary cooling-tubes, to a hemogenizer and from thence, through a cooler, to a trough, the temperature falling gradually from 120-124‹ F. to 32-34‹ F. The mass is then discharged to an ageing tank and from thence to a freezer, if ice-cream is to be made, or to smaller containers.