baber/WOPTO huggingface dataset:
Patent GB-841666-A (GB)
Title: Improvements in or relating to loudspeakers and loudspeaker magnets
Inventor: TETLEY FREDERICK WILLIAM
IPC: H04R9/02
Filed: 1958-07-25
Abstract: 841,666. Loud-speakers. SWIFT LEVICK & SONS Ltd. Dec. 30, 1958 [July 25, 1958], No. 23955/58. Class 40 (4). In a centre-pole loud-speaker in which the magnet has two concentric speech coil gaps 7, 17 separated by an annulus 3A of the centre pole 3, the cross-section of the annulus 3A is reduced internally of the outer gap 7 to effect a parallel distribution of flux to the respective inner walls of the two gaps, the flux path across the inner gap 17 being completed radially through the annulus 3A and across the outer gap 7. As shown, the mild steel centre pole 3, which is secured concentrically within the permanent magnet ring magnet 1 by the screw 4 passing through the mild steel base-plate 2, has a tapered middle portion 5 which leads to the annulus 3A. A mild steel annular pole-plate 6 leaves the outer annular gap 7 between itself and the annulus 3A, in which is disposed the speech coil 8 of a lower register cone 9 peripherally supported by a foam rubber ring 10 and a felt ring 11 in a casing 12. The annulus 3A is formed by an axial bore 14 which closely receives a plug 15, secured by screw 16, the outer end of the plug 15 lying clear of the wall of the bore 14 to leave the inner gap 17 in which is disposed the speech coil 18 of a higher register cone 19 supported and centred by a bridge 20 mounted on a screw 21 extending from the plug 15. The cross-section of the annulus 3A is reduced below the outer gap 7 by an external circumferential groove 22, thus effecting distribution of flux between the gaps 7 and 17, and defining the axial length of the inner wall of gap 7. The top plate 6 is chamfered back at 24 to the length of the gap 7, and a dust cover 25 protects the gap 7 from the usual sulphur filling 26 between the centre pole 3 and the magnet 1. The plug 15 may be of mild steel, or of cobalt iron with the advantage of greater flux density. The speech coil leads 27 for both coils pass through an insulated sleeve 28 in the casing 12. In an embodiment having three concentric gaps (Fig. 4, not shown), a smaller central plug (similar in shape to plug 15) is fitted in a bore in the plug 15.
Patent GB-349848-A (GB)
Title: Toy swimming animal
IPC: A63H13/12
Filed: 1930-08-11
Abstract: 349,848. Swimming toys. EINFALT, J., 13, Hessestrasse, Nuremberg, Germany. Aug. 11, 1930, No. 23978. [Class 132 (iii).] In a swimming toy of the kind having legs m subjected to a reciprocating paddling movement by a clockwork motor c, the legs terminate in pivoted webs n. o that fold together during the forward movement and spread out during the return movement. A stop p having an angular extension q limits the folding of the web members. The legs are driven from a crank d through a looped link g that also serves to oscillate the head i.
Patent GB-1466004-A (GB)
Title: Resistor devices
Inventor: SATO KUNIO
IPC: H01B1/22
Filed: 1974-05-30
Abstract: 1466004 Resistive cut-out device MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 30 May 1974 [30 May 1973] 24025/74 Heading H1K [Also in Division H2] An electric cut-out device comprises a body 20 consisting of conductive powder and an organic flux powder dispersed in a resin binder, the constituents being selected so that on increase of temperature above a predetermined limit, the conductive particles melt and aggregate with loss of particle to particle contact and consequent irreversible change from a low to a high resistance state. The body may also include silica powder. Examples of the resin, which preferably softens below the melting point of the conductive powder, and flux are given. The conductive particles may be Sn, Pb, Cd, In and Bi or alloys thereof. Also disclosed for comparison are C and Ag. The body may be formed by extrusion and be provided with a pre-formed or co-extruded silica-loaded resin sleeve 27. Electrodes 23, 24 of Cu/Cr, Cu/Fe, brass, bronze or aluminium preferably have carbon contact coatings 25, 26.
Patent GB-784129-A (GB)
Title: Improvements in or relating to electrical signalling systems
Inventor: LAWTON JOHN
IPC: H04J1/06
Filed: 1953-08-31
Abstract: 784,129. Automatic phase and voltage control ystems; inductors. BRITISH TELECOMMUNICATIONS RESEARCH, Ltd. Aug. 11, 1954 [Aug. 31, 1953], No. 24059/53. Classes 38 (2) and 38 (4). [Also in Group XXXIX] Carrier currents from two nominally identical supply equipments having a common frequency control, are combined with a relative phase displacement of 120 degrees so that no change in amplitude occurs if one equipment fails, the phase relationship being automatically maintained constant. As shown in Fig. 1, separate carriers from equipments S1, S2 are combined in two loads LA, LB over transformers T1, T2, the circuit from S1 including a phase-shifting network comprising a saturable reactor L1, the primary windings of T1 and the input impedance of a transformer T3. The secondary circuit of T3 includes a #/2 phase-shifting network inverting the impedance of a saturable reactor load L2 so that the input impedance of T3 is capacitive. Since both saturable reactors L1, L2 are controlled by rectified current derived from the combined output, variations of output amplitude cause the inductance of L1 and the capacitive input impedance of T3 to change and so vary the phase-shift imposed in the circuit from S1. In a modification, condensers C1 C2 may be shunted across L1, L2 to improve sensitivity and range of control. Each saturable reactor, Fig. 2, comprises a pair of ferrite toroids having pressed or ground slots forming openings SL1-SL3. The A.C. winding is made up of four equal sections W1-W4 which are accommodated in openings SL1, SL2 and have localized and opposed flux paths. The D.C. control winding and bias winding, if any, are wound together over the two toroids so that their fluxes act circumferentially. To suppress possible circulating A.C. fluxes, a short-circuited winding SC1-SC2 is arranged through opening SL3. By suitably spacing the two toroids optimum inductances may be obtained. Both reactors may be arranged on a single core which has double the. number of openings, a shortcircuited winding being interposed between the A.C. windings.
Patent GB-245066-A (GB)
Title: Improvements in caliper gauges
IPC: G01B3/48
Filed: 1925-09-28
Abstract: 245,066. Zeiss, C. [Firm of]. Dec. 27, 1924, [Convention date]. Linear-dimension gauges; surface and outline gauges.-In a gauge for measuring holes, screwthreads, &c. having two feeling members and a device for indicating their relative movement, the feeling members may be moved together in the same direction without affecting the indicating instrument. In Fig. 1, a ball g which contacts with the spring-pressed plunger h of an indicating instrument i is engaged by a feeling bolt c having an inclined bearing face c<2>, and by a second feeling bolt b having a bearing face b<2>. Both feeling bolts may have inclined faces, and positioning studs are arranged in offset branches of the casting a. Rotation of the bolts with in. clined faces is prevented by studs d engaging slots. Fig. 4 shows a modification adapted for gauging internal screw-threads. The plug gauge r is formed with springs v<1>, v<2> through which spring-pressed feeling bolts w<1>, w<2> pass and engage the flanks of the thread being gauged. The bolts also bear on the spring arms s<1>, s<2> of a slotted member s the end of which is in contact with the plunger z of the indicating instrument. The inclined ends of the arms SI, 82 bear upon a roller t which is supported by the flat end u of the plug.
Patent GB-453310-A (GB)
Title: Improvements in or relating to sources of light
IPC: H01J61/96
Filed: 1935-08-29
Abstract: 453,310. Lamps containing electric discharge tubes. TENNANT, W. J., 111, Hatton Garden, London.-(Soc. Anon. pour les Applications de l'ElectricitÚ et des Gaz Rares, Etablissements Claude-Paz & Silva; 8, Rue Cognac-Jay, Paris) Aug. 29, 1935, No. 24182. [Class 75 (iv)] A source of light of uniform tonality comprises one or more transparent neon tubes and one or more mercury tubes the inner walls of which contain or are coated with fluorescent substances and are therefore opaque to the radiations of the neon tubes, all the tubes being arranged within a cylindrical envelope which disperses the light and is provided with means to avoid on the envelope the colour effect of the fluorescent tubes. For this purpose, the diameter of the envelope may be appreciably larger than the sum of the diameters of the tubes, the fluorescent tubes being spaced away from the inner surface of the envelope. Alternatively, the inside or outside of the envelope may have a narrow opaque band reflecting towards each fluorescent tube, the width of the band preferably being about equal to the diameter of the fluorescent tube. The envelope may comprise a thin layer of opal glass and one or more layers of transparent glass. The colour of the. light may be varied by regulating the current supplied to the various tubes.
Patent GB-1371871-A (GB)
Title: Tear-off caps
IPC: B65D51/24
Filed: 1972-05-23
Abstract: 1371871 Caps for bottles SEIDEL KG Gebr 23 May 1972 [11 June 1971] 24199/72 Heading B8T A tear-off cap has a rolled edge 1 for engagement beneath a protuberance around a container neck and a line of weakness 2 located just above the edge 1 and having a cut-out portion laterally offset from or contiguous with an incision in the edge 1. A gripping tab for use in detaching the edge 1 is made by inserting a plastics or metal strip through the cut-out portion in the line 2 and fixing the ends together and to the cap at 10 leaving a free end 11 which may be retained in a recess in the top wall 12. The cap may be reused by snapping the remaining skirt over the protuberance around the container. Alternatively the skirt may be screw threaded.
Patent GB-792908-A (GB)
Title: Apparatus for producing hexagonal mesh wire netting with inter-twisted wires
IPC: B21F27/06
Filed: 1955-08-23
Abstract: 792,908. Making netting. SCHMID, O. Aug. 23, 1955 [Aug. 24, 1954], No. 24226/55. Class 83 (4) Apparatus for making wire netting and comprising netting beams carrying twisting tools and racks, guided in the beams, to rotate the tools, in a first working phase, the beams being moved longitudinally together with their associated racks to shift the wires transversely of the direction of travel of the finished web, and in the second working phase the racks only being moved to rotate the twisting tools, is characterized in that means for driving the racks, which includes a crank, stops or nearly stops them at the end of the first working phase and beginning of the second. Four netting beams 5, longitudinally slidable in a frame 4, carry half-sections of twisting bobbins 8, the halfsections carried by the left-hand beams, Fig. 5, carrying bobbins 11 containing wire 10, wire from a reel 9 passing through the half-sections on the right-hand beams. The formed netting is drawn over a feeder roll 13 and wound on to a take-up roll 15. In operation, in a first phase, the beams 5 are moved. longitudinally, the right-hand beams in the opposite direction from the left-hand beams, so that the halfsections are moved to face new half-sections. Racks 6, guided in the right-hand beams 5 and which in the first phase have moved with the beams, are then halted or nearly halted, and then, in a second phase, moved longitudinally of the beams to rotate the bobbins 8 and twist adjacent wires together. The beams and rack are then again moved together to reposition the bobbin half sections prior to twisting again. The beams 5 are moved longitudinally by a cam 23 and link means 38, 39, Fig. 6. The racks 6 are connected to a slide 33, 36 which is reciprocated by a crank-pin 30 on a gear 21 engaging a cam groove 32 in the slide 33. The slide 33 is stationary at the dead centres of the crank-pin, corresponding to the end of a second phase and beginning of a first, and the cam groove 32 is so shaped at 32<SP>1</SP> that the pin in its circular path does not move the slide at these points, between the dead centres, corresponding to the end of a first and beginning of a second phase.
Patent GB-411418-A (GB)
Title: Improvements in wheels with removable rims
IPC: B60B23/10
Filed: 1932-08-30
Abstract: 411,418. Vehicle wheels. SOC. POUR L'EXPLOITATION DE BREVETS DE ROUES AUTOMOBILES SEBRA, 27, Avenue MacMahon, Paris.-(Assignees of Bim, H. G. ; 27, Avenue MacMahon, Paris.) Aug. 30, 1932, No. 24234. [Class 144 (ii).] A tyre-carrying rim 2 is attached to the wheel by a split ring 5 wedged between the coned periphery 3 of the wheel 1 and the cylindrical surface 13 of the rim-base by means of clamps 14 and bolts 16. To prevent creeping, the ring 5 may be formed with a slot 20 to receive a stud 21 on the wheel, and the rim-base may be formed with a rib 22, Fig. 3, positioned between the ends of the ring 5. In the case of twin-rim devices, to facilitate assemblage of the inner rim, the outer rim-seat is formed of lesser diameter between which and the main locking-ring 5 a separate spacer-ring is fitted.
Patent GB-139125-A (GB)
Title: An element for use in building constructional toys or models
IPC: A63H33/12
Filed: 1919-10-06
Abstract: 139,125. Hornby, F. Oct. 6, 1919. Addition to 4183/14. Mechanical constructions, details for building up.-Relates to a modification of the element described in the parent Specification consisting of a tubular boss carrying a perforated web portion for use as a crank &c. According to the present invention, the boss 2 is threaded internally to receive a screwed rod 6 and may also be provided with threaded holes 7, 8 at rightangles to the main bore 3. The holes 7, 8 serve for the reception of a screwed rod or a locking- screw 9. The perforations 4, 5 in the web 1 serve for securing the element to a plate 11 &c.
Patent GB-696884-A (GB)
Title: Improvements in or relating to lavatory hand-basins and foot-baths.
Filed: 1949-09-21
Abstract: 696,884. Sink pedestals combined with footbaths., WEARHAM, J. Sept. 1, 1950 [Sept. 21, 1949], No. 24314/49. Class 26 The lower end of a hand-washing basin pedestal, which is adapted for fitment to the floor and to the waste system, terminates in or is attached to a chamber containing a foot-washing bath. The pedestal may be fitted below or integral with the basin and may be made of glazed earthenware or pressed or cast metal. In one form, Fig. 1, the base of the pedestal u contains a retractible bath b which is connected to the drain by a waste pipe plug o and a flexible pipe g is fed from a supply pipe e. The footbath may be slid out or may be rotatable about the vertical axis of the waste pipe f. An alternative form (not shown) similar to that shown in Fig. 1 but with telescopic feed pipes is also described. In another form, Fig. 3, a fixed bath b formed within the pedestal a is covered by a hinged lid b<SP>1</SP> which, in its lower position, forms a footrest. An extensible metal sleeve u having a clamping bolt v is fitted to adjust the height of the pedestal. The waste outlet plug is shown in Fig. 4 and comprises an externally threaded pipe w, fixed to the base of the bath and connected to the waste, having outet holes x and an internally-threaded sleeve o having overflow holes y. A heel rest p which may be covered with rubber or other material is fitted to the sleeve
Patent GB-156875-A (GB)
Title: An improved machine for cutting or paring trousers bottoms and for like purposes
IPC: B26D1/20
Filed: 1919-10-06
Abstract: 156,875. Bregman, M., and Clegg, A. E. Oct. 6, 1919. Traversing-cutter type for cutting rectilinearly. -In a machine for cutting trouser bottoms, &c., the garments are held by an adjustable clamp carried by a lever, while a hand-moved rotary cutter traverses a slot in the table and cuts off the length necessary. A cam on the lever of the clamp releases a trip lever which unclutches the cutter-driving mechanism when the lever is raised to lift the clamp out of its operative position. The garments are placed in the table A and are clamped by the presser D carried by the lever E which is pivoted at F and operated by the handle G. The presser is connected to its lever by slotted lugs H and thumb-screws at each end, so that each end may be adjusted independently of the other. The cutter K is driven by a band or chain X which passes round a sprocketwheel M on its shaft, and is kept in driving contact by the jockey pulley Z and a guide bridge niece Z'. The cutter is moved across the machine by the handle P. The clutch S, Fig. 3, is operated by the handle T and kept in action by the iatch U on the lever V having a stud V<1> to bear against the cam W on the lever E. When this lever is raised, a spring forces the latch and opens the clutch. In a modification, the cutter chain is driven by an electric motor carried by an overhead frame; a switch on the pivot of the lever E stops the motor when the lever is raised.
Patent GB-1509964-A (GB)
Title: Equipment for the handling of devices
IPC: B65G54/02
Filed: 1975-06-06
Abstract: 1509964 Feeding and orienting diodes, integrated circuits, &c. ITT INDUSTRIES Inc 6 June 1975 [8 June 1974] 24422/75 Heading B8A Articles which include a ferromagnetic material, e.g. diodes, transistors, and integrated circuits, are handled by a system which comprises two non-variable magnets 5 having a combined field the intensity of which increases in a direction of transportation of the articles, and a transporting electromagnet 6 operable by a switch (not shown). In Fig. 8, an article 1 held in the periphery of a rotating disc 11 is caused by energizing the magnets 6 when the article 1 is at a position 14, to jump to a position 10 where it is held between contacts for the carrying out of a measuring operation. When the magnet is de-energized, the magnets 5 (the upper one only, visible in Fig. 8) cause the article to jump back to its holder on the disc 11 which has by then reached position 4. In Fig. 9 (elevation), articles moving on a surface 2 under the action of magnets 5 (one only visible) are momentarily held at 10 by a magnet 8, and according to the result of a test performed at 10 are deflected above or below a guide 17, according to whether magnets 15, 16, or 6, 9, are energized. In Fig. 10 (plan view), an article is tested as before at 10. According to the result (e.g. polarity) it either proceeds by the action of magnets 6, 9, or it is rotated through 180 degrees by the momentary energization of magnets 19, 20, before proceeding as before. In other embodiments, articles are fed in single succession from a bulk supply (Figs. 2-4, not shown), or are accelerated (Fig. 1, not shown). The effect of gravity may be used to modify the movement of the articles (Fig. 3, not shown).
Patent GB-501974-A (GB)
Title: Improvements in or relating to magnetic balances for field use
IPC: G01R33/038
Filed: 1937-09-07
Abstract: 501,974. Magnetic measurements. ASKANIA - WERKE AKT. - GES. VORM. CENTRALWERKSTATT DESSAU UND C. BAMBERG-FRIEDENAU. Sept. 7, 1937, No. 24431. Convention date, Sept. 7, 1936. [Class 37] A magnetic balance for field use wherein the magnet system is housed within a casing has a level for horizontal adjustment built into the casing or into a heat insulating covering therefor to protect the level from thermal effects. The level 5 is shown built into the casing shell 1, or into a cork lining 4 therefor. Reference has been directed by the Comptroller to Specification 297,937, [Class 37].
Patent GB-379105-A (GB)
Title: Improvements in or relating to electric circuit interrupters
IPC: H01H33/76
Filed: 1931-09-01
Abstract: 379,105. High tension switches. WESTINGHOUSE ELECTRIC & MANUFACTURING CO., East Pittsburg, U.S.A.- (Assignees of Huffstutter, J. W. ; 685, Summer Avenue, Wilkinsburg, Pennsylvania, U.S.A.) Sept. 1, 1931, No. 24530. Convention date, Sept. 20,1930. [Class 38 (v).] Arc rupturing.-Upon downward movement of contact 5 away from contact 4 an arc is drawn in a narrow space bounded by two plates 24 of fibrous material, such as fuller board, that decomposes and evolves an unionized gas that passes turbulently through the arc. In order that the device will be effective over a range of current strengths, the plates 24 are biased towards each other by springs 25, the width of the space adjusting itself to the arc current so that the arc is always in contact with the plates so as to ensure evolution of gas and yet, with large currents, excessive pressure that might cause damage to the device is not produced. The hot gas escapes between cooling plates 31.
Patent GB-598880-A (GB)
Title: Improvements in or relating to aircraft sustaining rotors
IPC: B64C27/51
Filed: 1945-09-21
Abstract: 598,880. Hydraulic vibration - dampers. FAIREY AVIATION CO., Ltd., and BENNETT, J. A. J. Sept. 21, 1945, No. 24537. [Class 108 (iii)] [Also in Group XXXIII] Hydraulic drag hinge dampers are fitted to the rotor of a rotary-wing aircraft (see Group XXXIII) and are adjustable either manually or automatically so that the degree of damping can be increased at low speeds and reduced at higher speeds. In one form, Figs. 1 and 2, a hydraulic damper is connected between each blade d and its dog link b and comprises a cylinder f pivoted at g to the link and a plunger j on a rod k pivoted at m to the blade. The spaces in the cylinder on opposite sides of the plunger are connected by pipes n with chambers o in a housing p for a number of valves q (one for each cylinder) each having a tapered central portion movable axially in relation to an apertured partition r. The valves are attached to a plate s mounted on a spindle t which is movable axially in a bearing u against the action of a spring x interposed between the bottom of the housing and a second plate w on the spindle. The plate w is also acted on by the arms z of bell-crank levers carrying governor weights y so that, as the rotor speed increases, the valves q are moved upwardly to increase the effective area of the aperture between chamber o and decrease the damping. In the housing p is a chamber 11 open to atmosphere and connected by passages 12 to pairs of chambers 13 (one for each valve) in which are arranged non-return valves 14 controlling passages 15 leading to the chambers o. Any loss of fluid due to leakage from the cylinders f is thus compensated for by fluid drawn in from the chamber 11. In a modification, Fig. 3, each of the drag links b is prolonged at 16 beyond its flapping axis and is connected by a link 17 with an arm 18 fixed on a spindle 19 which also carries an arm z bearing against the underside of the plate w. Upward movement of any blade, therefore, raises the plate to adjust all the dampers.