baber/WOPTO huggingface dataset:
Patent GB-1497071-A (GB)
Title: Mounting of deflection sensitive elements in transducers
IPC: G01L7/08
Filed: 1975-04-11
Abstract: 1497071 Transducer EMI Ltd 11 April 1975 [17 April 1974] 16700/74 Headings G1M G1N and G1U A transducer comprises an element 1 sensitive to a chosen parameter, e.g. pressure, and mounted on a support 1, connecting means 4 arranged to transmit measured parameter related deflection of the element 1 to a deflection sensitive member 3, and a further support 5 connected to support 1 at first fixing points 6 and to the member 3 at further fixing points, the arrangement being such that movement of the first fixing points 6 caused by expansion of the support 1 in response to a temperature change causes a movement of the further fixing points to compensate for the different expansion of the member 3 and further support 5. In the pressure transducer shown, deflections of the stainless steel diaphragm 1 mounted on a stainless steel ring 2 are transmitted to a silicon beam 3 carrying strain gauges. The further support 5 in the form of a ring has a lower coefficient of expansion than ring 2 so that movement of the points 6 caused by expansion of the ring 2 causes the ring 5 to distort so that its expansion along the beam 3 is less than it would otherwise be and matches expansion of the beam 3.
Patent GB-1181935-A (GB)
Title: Improvements in or relating to Devices for the Heat-Treatment of Plate-like Semiconductor Bodies
IPC: C30B25/12
Filed: 1968-04-08
Abstract: 1,181,935. Electrically heated apparatus. SIEMENS A.G. 8 April, 1968 [7 April, 1967], No. 16764/68. Heading H5H. Apparatus for the epitaxial deposition of crystalline layers on heated semi-conductor plates 5 is constructed similarly to the apparatus described in Specification 1,124,330, but the quartz base of the reaction chamber 1 is supported by a plate 7 of thermally-resistant material, e.g. graphite or quartz. Plate 7 acts also as a temperature-compensating plate as described in Specification 1,181,937. A further plate 7a of beryllium oxide separates plate 7 from the heater 6, which is a meandering or spiral-shaped conductor, e.g. of carbon or graphite. Heater 6 is on spring supports and its supply leads 6a have spring properties. Alternatively, the support plate 7 rests on a spring body 14 comprising a hollow cylinder, with horizontal slits 14a, or of spiral spring shape, body 14 being of graphite or carbon. Specification 1,124,328 is referred to.
Patent GB-509529-A (GB)
Title: Improvements in or relating to lugs for use in securing covers to their cases, or like uses
IPC: B65D45/02
Filed: 1938-06-07
Abstract: 509,529. Bolted joints. WESTON, E. June 7, 1938, No. 16844. [Classes 44 and 89 (i)] [Also in Group XXII] Two elements, e.g. the lid and body of a metal case, are secured together by a pair of lugs A, B and a set-screw C, the edges of lug A being overlapped and contacted by a cowl D extending from the edges of lug B so as to protect the set-screw from the weather &c.
Patent GB-855507-A (GB)
Title: Improvements in motor speed governor units for electric motors
IPC: G04C3/16
Filed: 1958-05-27
Abstract: 855,507. Interrupters. CONSOLIDATED ELECTRONICS INDUSTRIES CORPORATION. May 27, 1958 [March 17, 1958], No. 16853/58. Class 38 (5). [Also in Groups XVIII and XXXV] In a motor-governor unit having contacts opened at instants determined by the speed of the motor and closed at instants determined by a constant-speed device, the said device comprises a balance-wheel 62, a pallet lever 73 actuated by said wheel, and having a magnetic arm 81, and magnetic elements 82, 83, of opposite polarity positioned on opposite sides of the arm. The rotor of the motor comprises coils 25 connected to an eccentric commutator 26 having a first segment in the form of a split collar concentric with shaft 23, and second and third segments consisting of U-shaped wire elements. The shaft is provided with a drive pinion 30 adapted to engage the gears of a clock. Stator magnets 31, 32, comprise permanent magnet bars 33, 34, with extension-pieces 35, 37, and pole-pieces 41, the magnetic elements 82, 83, being secured to the pieces 35, 37. Brush contacts 55 are mounted on supports 53 and are urged towards the commutator 26 to follow its eccentric outline during rotation of the rotor. The motor tends to operate at a speed higher than that desired, the brush contacts being displaced from side to side so that, during the starting-period, the pallet lever sets the balance wheel in motion at its natural frequency. When the motor tends to exceed a predetermined speed, its circuit is broken when the right-hand contact, for example, is released by the commutator since the magnetic attraction between the arm 81 and element 83 holds the contact in a displaced position. At a later instant, the pallet lever 73 is engaged by pin 76 so allowing the displaced contact to re-engage the commutator and re-establish the circuit. The foregoing operations are cyclically repeated so that the average speed of rotation is dependent upon the balance-wheel oscillations. Specifications 668,381 and 885,506 are referred to.
Patent GB-583979-A (GB)
Title: Improved interchangeable spanner holder
IPC: B25B13/08
Filed: 1944-09-05
Abstract: 583,979. Exchangeable spanners. DAVIS, W. G. Sept. 5, 1944, No. 16910. [Class 61 (iii)] An interchangeable spanner consists of a spanner holder in the form of a steel stamping having a vertical slot G in one end and a horizontal slot D in the other and spanner heads E and H having shanks F adapted to fit reversibly in the slots G and D. In combination with the spanner holder in an extension holder J, Fig. 4, which is provided with a slot C and a shank K. A further addition is a right angle adapter L, Fig. 6, also having a slot M and a shank N. A spring ball may be used for holding the parts together.
Patent GB-1454697-A (GB)
Title: Process for making polyols
IPC: C07H3/02
Filed: 1974-04-18
Abstract: 1454697 Pentitols from pentose rich hydrolysates SHOMEN SOKERI OSAKEYHTIO 18 April 1974 [25 April 1973] 16912/74 Heading C2C Polyols are obtained from pentose-rich pentosan hydrolysate solutions by filtering off suspended solids, removing inorganic salts and a major part of the organic impurities by ion exclusion; removing the remaining organic impurities with an ion exchange resin or activated carbon; fractionating the solution by ionexchange chromatography to give a pentose solution having a high xylose content; hydrogenating the solution to form a polyol solution; and fractionating the latter to give highly pure polyol fractions, free of unreduced sugars and other impurities. The final step of the process is preferably carried out by supplying the polyol solution to polystyrene sulphonatedivinylbenzene resin in a salt form and successively separating an unhydrogenated sugar fraction containing other impurities and a substantially pure polyol fraction.
Patent GB-1373000-A (GB)
Title: Electrophotographic carriers
IPC: G03G9/113
Filed: 1971-12-29
Abstract: 1373000 Electrostatographic carriers INTERNATIONAL BUSINESS MACHINES CORP 29 Dec 1971 [28 Jan 1971] 16972/74 Divided out of 1372998 Heading G2H [Also in Division B2] A coating of polytetrafluorethylene on electrostatographic carrier particles is cured by heating (e.g. to 780‹F) after which quenching is effected in water. The polytetrafluorethylene coating composition may contain a surface active agent, water and toluene. It may be applied by dipping, spraying, tumbling or fluidized bed treatment. The coating thickness may be 1-20Á. The carrier core material may be sand, glass or metal beads, or ferromagnetic material. It may have a particle size of 50-1,000Á.
Patent GB-421129-A (GB)
Title: Improvements in frequency transforming arrangements
IPC: H03B19/12
Filed: 1933-06-14
Abstract: 421,129. Valve generating circuits. TELEFONAKTIEBOLAGET L. M. ERICSSON, 33, Kungsgatan, Stockholm. June 14, 1933, No. 17022. Convention date, June 14, 1932. [Class 40 (v)] Electric oscillations are converted to a fractional lower frequency by the use of a balanced pair of modulating valves the grids of which are coupled in push-pull to the source of fundamental frequency, the parallel-connected anodes being connected to one or more impedances which are so dimensioned and coupled back as to transfer voltages to the grid circuit which combine with the fundamental oscillation and produce difference frequencies of the same frequencies as those fed back. As shown in Fig. 1, the fundamental wave F is applied through transformers T in phase opposition to the grids of balanced valves E, E<1>, the plates of which are connected together and through an impedance Z to the plate battery. The impedance Z may be a tuned circuit or a filter having high impedance at the frequency F /2. It is coupled by its coil L to a centre-tapped coil A, which has a bias battery V connected between its mid-point and the cathode, and has its ends connected to the respective grids so as to feed back the frequency F /2 to the grids in phase opposition. The valves are adjusted and balanced so that their joint plate currentgrid volts characteristic, shown in Fig. 2, is of symmetrical parabolic or other form such that the plate current is dependent only on even powers of the grid voltage. Any current of frequency F /2 in the plate circuit is fed back to the grid circuits where it combines with the fundamental frequency F to produce the difference frequency F /2 which is therefore sustained. By employing a series of impedances Z in the plate circuit tuned to offer high impedance at the frequencies F /n, 2F/n, .... (n-1 )F /n, and a series of centre-tapped or divided grid coils coupled to these plate impedances, a whole series of proper fractions of the fundamental frequency may be produced (Figs. 8 and 9, not shown). The plate circuit may also include an impedance tuned to a multiple of the fundamental frequency, and other impedances tuned to improper fractions thereof (Fig. 7 not shown). Reaction of the anode load on the grid voltages is reduced or avoided by employing screen-grid valves, or is compensated as in Specification 335,009, [Class 40 (v)], by a winding K, Fig. 3, coupled to the plate coil L and arranged to feed back in-phase oscillations to the grid circuits by connecting the winding K between the bias battery V and the centre-tap of the coil A. The coil K may be dispensed with if the bias battery V is connected to the coil A at a point suitably displaced from its mid-point (Fig. 4 not shown).
Patent GB-1106034-A (GB)
Title: Improvements in or relating to devices for cutting metal material
IPC: B23K7/00
Filed: 1965-04-22
Abstract: 1,106,034. Cutting by fusion. T. A. FIRESTONE. 22 April, 1965 [4 May, 1964], No. 17025/65. Heading B3V. Metal is cut into lengths by moving it against a stop 23, Fig. 1, and then dividing it with a fusion type cutter 30. Strip metal is conveyed on endless bands 13 running around motor driven pulleys 11, 12. A bridge 20 adjustable longitudinally of the strip by lead screw 17 and motor 26, carries a rod 21 and rotary sleeve 22 mounting a number of stops 23 which are moved downwardly by a magnetic switch 25 so as to be engaged by the leading end of the strip. This stops the feed of the strip and the cutter 30 is then moved transversely by a lead screw 32 driven by motor (33), Fig. 2 (not shown). At the end of its travel the motor (33) is set automatically for reverse movement on the next out. The cutter may be a laser beam, plasma jet or flame torch.
Patent GB-530122-A (GB)
Title: Improvements in and relating to control systems for dynamo electric machines
IPC: H02J3/42
Filed: 1939-06-10
Abstract: 530,122. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. June 10, 1939, No. 17062. Convention date, June 10, 1938. [Class 38 (iii)] A synchronous motor 1 is started as an induction motor and, as synchronous speed is approached, a relay 15, having current and voltage coils 18, 19, and an opposing voltage coil 21, is caused by the frequency, magnitude, and phase angle of the armature current pulsations to close its contacts 22 for a sufficient period to enable a time-delayed relay 25 to operate and de-energize a further time-delay relay 24, which energizes a switch 11 to connect the motor field to a source of excitation. The switch 11 retains itself over the contacts 32 of the relay 15, and short-circuits impedance 26, 30 in the circuit of the relay coil 19. Thus when the motor falls out of synchronism and the contacts 22 re-open, the starting connections are restored and the motor field re-excited when the speed again approaches synchronism. Reference is made to Specifications 464,866, 512,361 and 517,676.
Patent GB-315546-A (GB)
Title: Regenerating active carbon
IPC: C01B31/08
Filed: 1928-06-13
Abstract: 315,546. Leny, W. d' and Imperial Chemical Industries, Ltd. June 13, 1928. Carbon.-Active carbon which has been used for absorbing sulphur compounds from gases is regenerated by treatment with aqueous nitric acid, e.g. of about 15 per cent strength, so as to oxidize the sulphur or sulphur compounds. The acid may in some cases be heated, e.g. to about 50‹ C., to accelerate the reaction.. The wash liquor may be used repeatedly, if necessary with the addition of fresh nitric acid, until it becomes too rich in sulphuric acid, when it is distilled to recover the nitric acid. The carbon may finally be washed with distilled water,
Patent GB-231061-A (GB)
Title: Improvements in coupling valve
IPC: F16L37/096
Filed: 1924-07-17
Abstract: 231,061. Shipley, C. M. July 17, 1924. Couplings, discon - nectible; with valves and cocks. - A coupling valve, applicable for transmitting liquid fuel from one aeroplane to another while in flight, comprises two couplings parts, one of which contains the valve, which is opened by and locked to the other part. One of the coupling parts 10 is provided with a transverse perforated plate 15 having a depending sleeve 17 which is integral with a screwed plug 18 having a conical mouthpiece 20. A sliding tubular valve 23 fits into the sleeve 17, and carries an annular weight 27 to maintain it in its lowest position so that the openings 31 are out of register with the openings 30. The valve 23 carries spring catches 34. The other coupling part 11 pushes the valve upwards, and the catches 34 engage in the groove 37. A pivoted disc valve is mounted on the spindle 38 and is normally kept closed by the spring 46 by means of the rack and pinion 41, 40. When the coupling is engaged, the sliding disc 42 is forced downwards by the flared opening 20, and the disc valve is opened. When fully engaged, the catch 50 enters a groove 21 to lock the coupling, and the catch may be released by a cord attached to the lever 51.
Patent GB-974675-A (GB)
Title: Servo system
Inventor: SCHULTE FREDRICK EUGENE
IPC: B64D45/00
Filed: 1962-05-05
Abstract: 974, 675. Electric indicating systems. LEAR Inc. May 5, 1962, No.17350/62. Heading G1N. Apparatus for automatically correcting the readings from a flux-gate compass for errors due to a ship's magnetism comprises a circular potentiometer whose slider is coupled to the compass card, the potential distribution being preset to provide an appropriate correction voltage for each heading. As shown (Fig. 1), a flux-gate compass 15 feeds the stator windings 16 of a synchro 11 having two perpendicular rotor windings 13, 14. The signal from winding 13, modified as below, is amplified at 19 to energize a motor 10, driving the compass card 24 and repositioning the synchro rotor 12. The signal from winding 14 is amplified at 21 and fed via transformer 20 to a series of parallel potentiometers 22 whose preset sliders 23 are connected to equi-spaced tapping points on a circular potentiometer 17. The slider 18 of potentiometer 17 is also driven by motor 10, and predetermined correction potential tapped off at each heading is added to that in winding 13 to produce the correct setting of the compass card 24. The gain of amplifier 19 is controlled via lead 25 oy amplifier 21 to ensure that motor 10 is driven by a constant voltage for a given displacement. In another embodiment (Fig. 2) the compass card 24 is sensitive to the short term corrections sensed by a gyro 29, and the long term corrections sensed by the flux-gate compass 15, as corrected by circular potentiometer 17.
Patent GB-256381-A (GB)
Title: Improvements in or relating to steam traps
IPC: F16T1/34
Filed: 1925-07-07
Abstract: 256,381. Armstrong, C. H. July 7, 1925. steam traps.-A steam trap employs a disc lift valve E with labyrinth grooves E<1> between it and its seating C, carried by a hollow stem D to which the steam has access so that the position of the valve relatively to its seating is adjusted automatically according to the expansion of the hollow stem. Water is discharged through the outlet F. The screwed plug C<2>, forming the seat,- ing, is adjustable to or from the valve member E.
Patent GB-293858-A (GB)
Title: Improvements in the treatment of fabrics made of or containing cellulose derivatives
IPC: D06M23/18
Filed: 1928-06-15
Abstract: 293,858. British Celanese, Ltd., (Assignees of Dreyfus, C.). July 15, 1927, [Convention date]. Edges, treating.-Ribbons are made from wider fabrics composed wholly or substantially of cellulose derivatives such as cellulose formate, acetate, propionate, or butyrate, or methyl or ethyl cellulose, by cutting the fabrics into strips and sealing the severed edges against, fraying or ravelling by fusing the edges and then allowing them to solidify. The fabric may be cut into strips by a, heated knife, adapted to fuse the severed edges. In the Specification as open to inspection under Sect. 91 (3) (a) it is stated that solvents such as acetone, diacetone alcohol, chloroform, cyclohexanoiae, &c., or swelling agents may be employed for dissolving a part of the material at the, edge of the fabric, coalescence of the cut yarns taking place, on evaporation of the solvent. This subject-matter does not appear in the Specification as accepted.
Patent GB-562037-A (GB)
Title: Improvement in apparatus for producing magnesium
IPC: C22B26/22
Filed: 1942-12-10
Abstract: 562,037. Distilling magnesium. ELECTRO METALLURGICAL CO. Dec. 10, 1942, No. 17579. Convention date, Jan. 9. [Class 82 (i)] Apparatus for producing magnesium from magnesium oxide, calcium oxide, and silicon comprises a shell 10 with a heat-insulating lining 16, a cover 11 and a condenser 13, the two latter parts being removably connected to the shell so as to form gas-tight seals therewith. Within the shell is a removable charge-supporting basket 20 having solid outer walls and a hollow core 21 having apertures therein to allow the magnesium vapour to pass into the core and so to the condenser, which may be water-cooled. The basket may be provided with perforated partitions to form a series of compartments, and only alternate compartments may be loaded with charge to be reduced. Within the lining 16 is a resistor winding 18 ; alternatively, or in addition, to said winding heater elements of the immersion type may be inserted in the empty compartments or packed in with the charge. In the latter case all the compartments may be charged. A pipe 14 leading to a pump enables the pressure to be reduced at the start of the reduction process. When the process is in operation, the condensation of the magnesium vapour maintains the reduction in pressure. Instead of a removable basket 20, a permanentlyfixed charge-container may be constructed within the lining 16. A bottom section of the inner wall 21 is then provided with large apertures which are covered or re-covered by a movable sleeve during the working and, after removal of the condenser, the discharge of the residue, respectively.
Patent GB-1235581-A (GB)
Title: Apparatus for reproducing pictures stereoscopically
IPC: H04N13/00
Filed: 1969-04-03
Abstract: 1,235,581. Luminescent materials. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 3 April, 1969 [9 April, 1968], No. 17584/69. Heading C4S. [Also in Divisions Hl and H4] Stereoscopic images formed by each of two different sets of phosphors on a cathode-ray tube screen are viewed through filters, e.g. as spectacles, so chosen that only the relevant image is presented to each eye while the apparent colour of the images is identical. A filter may be placed over the screen to exclude a specific colour component which is required to be visible through the spectacles alone, e.g. signal lights on the apparatus. Each phosphor set, which may be in strip or dot form, may be composed of a plurality of phosphors, either mixed or as discrete elements, the tube providing a number of electron beams equal to the number of types of phosphor element. Thus, for example, a tube similar to the normal tricolour tube, or such a tube in which the red and green phosphors are mixed, could be used. The use of separate phosphors in each set permits the relative contribution of each phosphor to be adjusted. To provide yellow pictures, one image may be derived from red and green phosphors, e.g. Y 2 O 3 , YVO 4 , Gd 2 O 2  or Y 2 O 2 S, activated with trivalent europium, or InBO 3  activated with trivalent terbium, for red, and zinc silicate or magnesium gallate activated with bivalent manganese, for green, while a yellow phosphor such as Sr 3 (PO 4 ) 2  activated with trivalent dysprosium provides the second image. The blue luminescence of the latter phosphor is eliminated by a filter placed over the screen.
Patent GB-113943-A (GB)
Title: Improvements in and relating to the Motor Mechanism of Gramophones and the like.
Inventor: LEWIS ALFRED
IPC: G11B17/00
Filed: 1917-07-13
Abstract: 113,943. Lewis, A. July 13, 1917. Spring powerstoring mechanism. -A gramophone is driven by a main spring b in a barrel a loose on a shaft c. The main spring is wound up by turning the barrel by its teeth r, and motion is transmitted from the shaft to the turntable, through spurgearing j, k, l, n, the last pinion being on the shaft g of the turntable. This shaft is co-axial with the barrel-shaft c and has a pivot-bearing therein. The barrel-shaft works in a bracket f and in a footbearing d' in a bracket e. The side-shaft m of the gearing has a shoulder between the wheel l and pinion k, and the bracket f constitutes a bearing thereunder while a head-bearing is provided by a pivot o in the main frame p. The head and foot bearings o and d<1> and the bearing h for the table-shaft g can be removed to allow the mechanism to be taken to pieces.
Patent GB-247830-A (GB)
Title: Improvements in and relating to free-wheel hubs with back-pedalling brakes for cycles and the like
IPC: B62L5/10
Filed: 1925-07-10
Abstract: 247,830. Berlin - Xarlsruher Industrie-werke Akt.-Ges., and Schall, J. L July 10, 1925. Back-pedalling brake ancl free-wheel arrangements.-Relates to a free-wheel and back-pedalling hub in which a helical spring having one end fixed is expanded for braking purposes against the interior of the hub. In the construction shown in Fig. 1, a clutch or operating member e is carried by a fast thread on a sleeve connected to the chain wheel c so that forward rotation of the chain wheel engages the outer conical surface of the member e with the wheel hub a. Backward rotation of the chain wheel moves the member e to the left until it engages a toothed ring g which is slidably but non- rotatably mounted on the axle and acts through a ball thrust member h so as to move axially a sleeve i having a cam-shaped end which engages cam surfaces on a fixed guiding piece l. One end of the helical spring is fixed and the other end engages a slot n in the sleeve i so that the combined rotary and axial movement of the sleeve unwinds or expands the spring into engagement with the interior of the hub a, the arrangement being such that the spring is unwound in the direction of forward rotation of the hub. In a modification, the slot n is of such length that the spring is subject only to rotary movement.