baber/WOPTO huggingface dataset:
Patent GB-721356-A (GB)
Title: Improvements in or relating to optical projection apparatus
IPC: G02B21/36
Filed: 1951-03-19
Abstract: 721,356. Projection microscopes. ROGERS, G. L. Jan. 21, 1952 [March 19, 1951], No. 6552/51. Class 97 (1). A device for adapting an optical projector for use as a projection microscope comprises a mounting, for a microscope condenser, microscopic object and microscope objective, attachable to. the projector with the microscope system aligned with the projection light source. The form shown is used with a projector having parts carried on parallel rails 24 and comprises collars 11, slidable on the rails and secured by screws 12, supporting a plate 10. The plate carries a ring 13 in which the microscope condenser 15 is located by screws 14. The object such as a slide 16 is held on the plate 10 by springs 17. The plate 10 also carries a pillar 18 on which a collar 19 is adjustable by a friction or rack and pinion adjustment 20. 'The 'collar' 19 supports the mounting 21 for the objective 22. A polarizing filter 23, with two halves having perpendicular planes of polarization, may be provided in the manner described in Specification 692,781. The mode of attachment of the device to the projector may be altered to suit the projector construction. If the front part of the projector is detachably hinged the device may be similarly attached instead. Alternatively the device may be supported on a cylindrical member inserted in the tubular holder for the mount of a detachable projection lens. The condenser of the projector may be wholly or partly removed or neutralized by a negative lens. Relative motion may be provided between parts of the microscope condenser for adjustment of the plane in which an image of the lamp filament is formed.
Patent GB-563205-A (GB)
Title: Frequency modulator
IPC: H03C3/26
Filed: 1943-04-23
Abstract: 563,205. Frequency modulation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. April 23, 1943, No. 6571. Convention date, April 27, 1942. [Class 40 (v)] In a frequencymodulated transmitter, the oscillation generator comprises a pair of thermionic valves V1, V2 with their anodes connected in common to a tuned circuit L1, C1 and with their control grids connected to opposite sides of a similarly-tuned circuit L2, C2, the two circuits being loosely coupled by inductive relation between the coils L1, L2 and being also coupled by a direct connection between a point on the coil LI and the mid-point of the coil L2. The voltages fed back to the grids by the direct connection are in phase opposition to the anode voltage and are sufficient to maintain selfoscillation. The voltages fed back by the inductive coupling are in opposite phase to each other and in quadrature with the anode voltage. The signal voltage is applied in pushpull through a transformer T to screens or other grids in the valves, and causes a modulation of the frequency of the generated oscillations which are taken off by the coupling coil L3. In a modification, a condenser is interposed between the tappings on the coils L1, L2, Fig. 2 (not shown).
Patent GB-471206-A (GB)
Title: Improvements in and relating to rotary scraping apparatus for sludge settlement tanks and the like
IPC: C02F1/40
Filed: 1936-03-05
Abstract: 471,206. Gravity-separation apparatus. HARTLEY, C. J., and HARTLEY, E. March 5, 1936, No. 6624. [Class 111] Rotary scrapers for settling tanks are built of straight sections, each pivotally suspended by one or more chains or rigid links, the adjacent ends of the sections being loosely held together, so that they can rise and fall independently to accommodate themselves to irregularities on the bottom of the tank. As shown in Fig. 3, each scraper section 21 is suspended from an arm 14 of the rotary structure by two links 17. Both the links and the arm 14 having alternative points of attachment 19, 33, so that the effective length of the links can be adjusted. The links may be formed of two parallel members. One end of a scraper section 21 is forked at 23 to engage the adjacent end of the next section so as to keep it in alignment. As shown in Fig. 7, each link has bifurcated ends with threaded portions connected by a turn-buckle 32. Fig. 9 shows a modification in which each scraper section is suspended by a single link 17 and the sections are kept in alignment by jaws 34 carried by members 35 bolted to the arm 14.
Patent GB-537199-A (GB)
Title: Improved means for fixing adjustable blades to machines such as rotary pumps
IPC: F04D29/36
Filed: 1940-04-12
Abstract: 537,199. Axial-flow blowers and pumps. ESCHER WYSS MASCHINENFABRIEKEN AKT.-GES. April 12, 1940, No. 6662. Conven-, tion date, May 23, 1939. [Classes 110 (i) and 110 (iii)]. In a rotary machine such as an axial flow blower or pump with blades 4 angularly adjust-' able on the rotor 3, the sleeves 14 attached to the blade stems 6 are fixed in bores in the rotor by threaded bushes 8 provided with polygonal heads 9 to facilitate adjustment and a two-part ring 12, 13 with its joint surfaces at right-angles to the rotor axis engages grooves 17 on the rotor and lies flush with the plates 5 connecting the blades 4 to their stems. The rings are fixed by screws 18.
Patent GB-1117855-A (GB)
Title: Press matrix
IPC: B21D53/02
Filed: 1967-02-13
Abstract: 1,117,855. Making dies; cupping. P. E. LESKINEN. 13 Feb., 1967 [4 March, 1966], No. 6714/67. Headings B3A and B3Q. A press platen comprises projecting pins 4a secured in apertures 1a in a plate 2a by a layer of plastics 6 adhering to the pins and the plate. The platen is of the type described in Specification 888,636, to which reference is made. The plastics layer 6 may be reinforced with glass fibre, and grooves (7), Fig. 3 (not shown), may be formed in the pins for keying with the plastics. The pins may project unequally beyond the surface 3, and the projecting part may be of different cross-section from that located in the plate 2a. In another form, Fig. 10 (not shown),. the pins are of rectangular cross-section.
Patent GB-813114-A (GB)
Title: Improvements relating to flooring blocks
Inventor: GREENWAY ROBERT WALTER
IPC: B29C48/12
Filed: 1955-03-08
Abstract: Thermoplastic synthetic resin compositions for making flooring blocks consist of (1) polyvinyl chloride mixed with a naphthalene-formaldehyde resin, or pitch, or a coumarone-indene resin, and a plasticizer, i.e. tri-xylenyl phosphate and a hydrocarbon oil, and pigments and fillers such as China clay, whiting, wood flour and asbestos; and (2) coumarone resin, hydrocarbon oil, paraffin wax, pigment, China clay, whiting, wood flour and asbestos.ALSO:Flooring blocks having flat upper surfaces and undercut lower surfaces that present re-entrant faces affording at least one keying formation are made by heating, extruding and cutting a composition containing a natural or synthetic resinous material, plasticizers and/or fillers and pigments.
Patent GB-1166143-A (GB)
Title: Process for the Preparation of Carboxylic Acids
IPC: C07C207/00
Filed: 1967-02-13
Abstract: 1,166,143. Carboxylic acids from α-nitroketones. GULF RESEARCH & DEVELOPMENT CO. 13 Feb., 1967 [16 Feb., 1966; 23 Jan., 1967], No. 6720/67. Heading C2C. Carboxylic acids, especially those of formula R 4 COOH are prepared by contacting an organic phase comprising an α-nitro-ketone containing at least four carbon atoms and which has at least one hydrogen atom attached the carbon atom bearing the nitro group, preferably of formula R 4 COCH(R 5 )NO 2  (in which R 4  is a hydrocarbon radical of from 1 to 23 carbon atoms, R 5  is hydrogen or a hydrocarbon radical of from 1 to 23 carbon atoms, the sum of R 4  and R 5  being from 2 to 23) with an aqueous phase containing a catalyst which is a compound that furnishes hydroxyl ions in aqueous solution, the phases being substantially immiscible, and the molar ratio of water in the aqueous phase to the ketone in the organic phase being at least 0À8:1. Specified catalysts include ammonia, amines, and hydroxides, alkoxides, and alkylcarboxylates of alkali and alkaline earth metals, particularly sodium hydroxide. The molar ratio of catalyst to ketone is preferably between 0À1: 1 and 0.01: 1 and the reaction temperature from 20‹ to 150‹ C. The process may also incorporate the additional steps of preparing the α-nitroketone from the appropriate 1-nitro-2-nitroso compound (or its dimer), which in turn can be obtained by nitrosation of a charge stock comprising an α-olefin having from 4-25 carbon atoms. These preliminary processes are the subject of Specification 1,166,142. Examples detail the preparation of heptanoic acid from 1- nitro - octanone - 2, propionic acid from 1- nitro - butanone - 2, and 4 - pentenoic acid from 1-nitro-2-oxo hexene-5.
Patent GB-1200170-A (GB)
Title: A seal for a rotary shaft joint
IPC: F16D3/20
Filed: 1969-02-07
Abstract: 1,200,170. Shaft seals. GELENKWELLENBAU G.m.b.H. 7 Feb., 1969 [9 Feb., 1968], No. 6749/69. Heading F2B. Sealing means for a rotary shaft joint comprises a flexible bellows 3 which has a part of its external surface supported by a rigid ring 5 in order to prevent the bellows bulging out during rotation due to the centrifugal effect of the joint lubricant. The bellows has radially inner and outer axially-extending ends 3b and 3a respectively interconnected by a V- section portion 3c, the end 3a being clamped by a clip 4 to a rigid member 1 secured by nuts 2 to one shaft (not shown) of the joint and the end 3b being clamped by a clip 7 to the other shaft 6. The ring 5 is vulcanized or secured by adhesion to the bellows which is also supported on its inner surface adjacent the ring 5 by an extension 1b of the member 1. In a modification, Fig. 5, the support ring 55 bears against the bellows 3 and is secured by screws 8 to the nuts 2. In another modification, Fig. 7, the bellows 73 is supported by a conical sleeve 75 and the outer end 73a of the bellows is clamped between a member 71 and an extension 75a of the sleeve. Reference has been directed by the Comptroller to Specification 1,158,147.
Patent GB-110884-A (GB)
Title: Improvements relating to Bedsteads.
Inventor: BRADNACK WILLIAM
IPC: F16B12/56
Filed: 1917-05-12
Abstract: 110,884. Bradnack, W., and Bradnack, G. May 12, 1917. Joints and connexions.-A corner connexion for bedsteads comprises a bracket a having thereon a tapered lug b and a lug i, and a casting d on the angle-iron having a socket c to engage the lug b and a projection h having an undercut slot to receive the shaped head f of a bolt e, which passes through the projections i, b and is secured by a nut g thereby drawing the two members of the joint together. In a modification, the parts h, i are formed with upstanding lugs j, k to receive a bolt e, the lug k being slotted.
Patent GB-781013-A (GB)
Title: Improvements in wire stranding machine
IPC: B21F7/00
Filed: 1955-03-08
Abstract: 781,013. Machines for making wire ropes. COOK, J. March 8, 1955 [March 19, 1954], No. 6812/55. Class 109 A wire stranding machine comprises a base, a flyer 19. rotatably mounted thereon, a motor 57 and driving connection for rotating the flyer, a reel supporting member coaxial with the flyer to receive a reel and to rotate it relatively to the flyer, means 'for guiding wire strands to and on the flyer and to distribute them on to the reel, and a drive between the flyer and reel supporting member to control positively the relative motion between flyer and reel, and means for varying the ratio of the drive during the winding of wire on to the reel. Wires W from supply spools are led through a spider S into the bore of the shaft 27, thence around a pulley 20 to pulleys 56 on bars 55 of the flyer 19 driven by the motor 57 through pulleys 58 (not shown), 25 and belt 58a. The pulley 25 has attached thereto a pulley 24 which through a belt 63, drives a pulley 62 on a lay shaft 59, the pulley 62 being manually adjustable by a hand wheel 78 or automatically through a worm wheel 68 and shaft 67. The lay shaft 59, which is braked by an electric-type brake 59a when the motor 57 is switched off, through a belt 70 and pulley 71, drives the hollow shaft 36, which, through a dog plate 51 and pins 52 rotates the reel 53 to take up the twisted wires. A further motor 46 (not shown), through a screw, reciprocates the shaft 36 and hence the reel 53 to traverse the gauge.
Patent GB-609082-A (GB)
Title: Improvements relating to radio interference suppression
IPC: H03H1/00
Filed: 1946-03-05
Abstract: 609,082. Protective arrangements; inductances. HOOVER, Ltd., POWELL, J. B., and SEARLE, W. W. R. March 5, 1946, No. 6860. [Classes 38 (ii) and 38 (iv)] [Also in Group XXXVI] A radio interference suppressor unit, particularly for incorporation in the handle of an electric suction cleaner, includes a pair of closely coupled inductors formed by winding two wires side by side. The inductors are preferably tuned to different frequencies, either by adjustable condensers or by continuing the winding of one inductor beyond that of the other. The inductance of both windings may be varied by an adjustable core. Fig. 1 shows the inductors A connected in supply leads C<SP>1</SP>, C<SP>2</SP> and wound on a bobbin D having a core E which is formed with an extension E<SP>1</SP> providing a support for the condenser unit B of the suppressor. The last is of the.three-plate type, formed by winding metal foil and paper strips and has terminal strips G<SP>1</SP>-G<SP>3</SP> folded over and connected by binding to the machine leads H<SP>1</SP>, H<SP>2</SP> and earth lead H<SP>3</SP> (see Group XXXVI). Fig. 2 shows the circuit connections of the suppressor and a motor J in which the two inductors are denoted by A<SP>1</SP>, A<SP>2</SP> and the condenser plates by B<SP>1</SP>-B<SP>3</SP>. The complete suppressor may be enclosed in a cylindrical insulating casing and housed in the metal handle of a suction cleaner, the connections to the supply and machine leads being effected by plugs and sockets which are integral with the casing. The handle is preferably formed with a longitudinal slit adjacent the suppressor so that the former does not offer a closed circuit to circumferentially induced currents.
Patent GB-466837-A (GB)
Title: Improvements in or relating to cam followers
IPC: F16D65/14
Filed: 1936-01-27
Abstract: 466,837. Internal-expanding brakes. AUTOMOTIVE PRODUCTS CO., Ltd., and TRAPP, G. J. Jan. 27, 1936, No. 6878. Divided out of and addition to 448,550, [Group XXIV]. [Class 103 (i)] [Also in Group XXIV] Consists in the application of the cam follower claimed in the parent Specification to an arm or other member executing an angular movement under the action of the cam. The housing 18 for the roll 3 may be a bore formed in the arm 19 and, instead of a rotating cam 2, a lever 20 pivoted at 20a may act on the roll. The application of the follower to the wedgeactuated ends of a pair of brake shoes is described.
Patent GB-1109172-A (GB)
Title: Telescopic direction-finding apparatus
IPC: G02B23/16
Filed: 1964-02-19
Abstract: 1,109,172. Direction finding. E . L. DELMAR-MORGAN and H.E. BROOKS. May 18, 1965 [Feb.19, 1964], No.6889/64. Heading G1F. Telescopic direction finding apparatus comprises means for projecting an image at infinity of the appropriate part of an illuminated compass card 18 into the objective of the telescope 11 used for viewing distant objects. The telescope 11 is preferably one part of a binocular telescope viewing system, the distant objects being viewed through a transparent reflector 15. Light entering through this reflector 15 illuminates the compass card 18, and by means of a lens 14 and the reflector 15, an image of part of the card is projected on to the focal plane of the telescope. In a modified embodiment an additional reflector is used and the compass card is provided with a depending skirt carrying the markings. The skirt may be translucent and illuminated from within by a small lamp. The reflector 15 may have varying partially reflecting, partially transmitting characteristics or a set of different interchangeable reflectors may be provided.
Patent GB-1083759-A (GB)
Title: Improvements in or relating to optical anamorphic systems for the justification of printed text lines
IPC: B41B21/16
Filed: 1966-02-17
Abstract: 1,083,759. Photographic type-composing. ATELIERS BARIQUAND & MARRE. Feb. 17, 1966 [March 9, 1965], No. 6906/66. Heading B6W. [Also in Division G2] In an optical System for the justification of line images produced on a photographic emulsion E, Fig. 1, from an original D, as in Specification 800,893, in which D, E, are in the focal planes of lenses O 1 , O 2  respectively and a pair of wedge prisms P 1 , P 2 , are rotatable by equal amounts in opposite directions about axes X 1 , X 2 , a single starting point A for each line will be reproduced at A<SP>1</SP> and a line ending at C, J or L &c., can be arranged to be reproduced with a fixed end J<SP>1</SP> but any other starting point A 1 , A 2 , A 3  &c. such as for use with indention is also shifted and so accordingly the two prisms P 1 , P 2  are mounted about another axis X 3  so that the starting point of a line A, A 1 , A 2 , A 3  &c., which is to remain fixed may be selected as desired. As shown, Fig. 2, lens O 1 , is mounted in a carriage 6 and each prism P 1 , P 2  is mounted about its respective axis X 1 , X 2 , in a cage 8 which is pivoted about axis X 3  in a carriage 7 carrying the lens O 2 , Thus the lenses O 1 , O 2  may be moved independently along their optical axis Y, Y<SP>1</SP> by means of the carriages 6, 7. On rotating a shaft 3, mounted on carriage 7, a screw rods 2 slides a carriage 1 and, through pin 15 thereon, engaging the forked end, 16 of a lever 14 rigid with cage 8, causes rotation of the whole prism mounting about axis X 3 . When a shaft 18 is rotated the splined shaft 4 rotates a screw-threaded member. 5 to. slide a nut 17 thereon and, thus, through pin 21 and fork 22 rotates prism P 1  which is coupled by toothed wheels. (23), (24), Fig. 4 (not shown), to prism P2.
Patent GB-719485-A (GB)
Title: Improvements in and relating to radiation measuring devices
Inventor: MILNER CHRISTOPHER JOHN
IPC: G01J5/62
Filed: 1952-03-18
Abstract: 719,485. Radiation measuring. BRITISH THOMSON-HOUSTON CO., Ltd. Feb. 24, 1953 [March 18, 1952], No. 6968/52. Class 40 (3). [Also in Group XXXV] In radiant energy measuring apparatus of the type in which the sensitive member is periodically irradiated for example by means of a copper plate, and in which an alternating voltage is applied to the member, the periodic irradiation being synchronized with the applied voltage, a capacitor is connected in series with the sensitive member so that a direct voltage is developed across the capacitor of magnitude dependent on the radiation intensity. As shown, heat radiation from a source 1 is directed on to a lead sulphide photo-conductive cell 2 through a chopper disc 4 driven by a synchronous motor 5. The A.C. supplying the synchronous motor is also applied across cell 2 and condenser 7 in series the arrangement-being such that the radiation is always interrupted when the voltage across the cell' is of one polarity. A direct voltage is developed across capacitor 7 and it is shown in the Specification that if the fractional change in resistance of the cell is small this voltage is dependent only on the applied A.C. voltage and the fractional change of cell resistance and that if the total resistance of the meter is large compared with that of the cell the meter will be unaffected by small change in cell.resistance, i.e. the apparatus is free from "zero drift." This direct voltage is applied to a meter 11 through a low pass circuit 8, 10. In the arrangement of Fig. 2 the output voltage developed across condenser 7 is fed to the grid of an A.C. fed triode valve 20 the signal developed at the anode, being fed through a smoothing circuit 22, 23, 24 to the grids, of triodes 25, 26 between the anodes of which is connected a winding of transformer 27. The gridcathode potentials of triodes 25, 26 are determined by the signal developed across condenser 7 and determine the impedance of the other winding of transformer 27. Thus, the alternating current through a load 28 is controlled. In the arrangement shown the current increases as the pyrometer output increases and load 28 may be a lamp arranged to irradiate cell 2 when the radiation from source 1 is cut off. The action of the circuit is then to maintain the lamp current so that the two irradiations are nearly the same, the lamp input being an indication of source temperature. Alternatively if the cathodes of triodes 25, 26 are connected to the anode of valve 20, the arrangement operates as an automatic control system to maintain the temperature of the source constant by controlling the current in a heater 28.
Patent GB-953768-A (GB)
Title: Improved ball bearing and method of making same
IPC: F16C13/00
Filed: 1962-02-22
Abstract: 953,768. Making ball bearings. C. E. NICOLAIDES. Feb. 22, 1962 [Feb. 28, 1961], No. 6975/62. Heading B3A. [Also in Division F2] To fabricate the bearing a member 30 is formed from a single disc of sheet metal which is pressed to form a peripheral flange 14b (Fig. 3) which is pressed to form a channel 32 (Fig. 8). After taking another disc of-sheet metal which is pressed to form a dished structure 42 (Fig. 7), the member 30 is placed therein and a number of balls are placed between the members 30 and 42, the member 42 being then pressed to complete an inwardly-facing channel. Part of the member 30 may be pressed to form a tube 20 (Fig. 3) or instead a hole may be punched to receive an axial-supporting member 28 (Fig. 8).
Patent GB-939666-A (GB)
Title: Improvements in or relating to electrical signalling devices
IPC: G10K1/062
Filed: 1960-02-29
Abstract: 939,666. Rod vibrators. V. & E. FRIEDLAND Ltd., and J. DOGGART. Feb. 28, 1961 [Feb. 29, 1960], No. 7046/60. Class 13. In a solenoid-operated door-chime or the like, the coil 41 has a projection at each end and is gripped between two resilient arms 34, 35 upstanding from a base 23, the projections being received by sockets 36, 38 in the arms. The projections may consist of the ends of a hollow core 44 extending through the coil 41. The sides of the cover have apertures aligned with the antinodes of the sounding bars 19, 20.
Patent GB-566118-A (GB)
Title: Improvements in or relating to flexible couplings for driving internal-combustion engine accessories and other purposes
IPC: F16D3/56
Filed: 1943-05-04
Abstract: 566,118. Flexible couplings. BLACKSTONE & CO., Ltd., and TOWNSEND, R. E. J. May 4, 1943, No. 7062. [Class 80 (ii)] Torque is transmitted between members 17, 15 by a plurality of helical springs 22, axially arranged, and accommodated in pockets 18, 16, in the members 17, 15. As shown, for a chain drive for internal-combustion engine auxiliaries, the member 17 is secured to the crank-shaft 1 by a key 19. The member 15 is formed with a chain wheel 14, and, to prevent excessive straining of the springs 22, the key 19 enters a clearance slot 24 in the member 15. The latter is pressed by the springs against a shoulder 13 of the shaft and the friction produced tends to damp out vibratory movement. Radial lubricant grooves 25 are formed in the hub 15 of the chain wheel adjacent the shoulder 13. Specification 410,434 is referred to.