baber/WOPTO huggingface dataset:
Patent GB-879093-A (GB)
Title: Improvements in and relating to fuel feeding apparatus for steam boilers
Inventor: LIMPOUCH BOHUSLAV
IPC: F23K1/00
Filed: 1959-12-17
Abstract: 879,093. Drying fuel. PRVNI BRNENSKA STROJIRNA ZAVODY KLEMENTA GOTTWALDA, NARODNI PODNIK. Dec. 17, 1959, No. 42999/59. Class 51 (1). A method of grinding and drying fuel for the heating of steam boilers comprises pre-drying the fuel in a coal bin or pre-drying means, drying the fuel in a grinding circuit by combustion gases, recovering in a heat exchanger the latent heat of vaporization of water vapour contained in the combustion gases and the residual heat of the gases emerging from the grinding circuit and using the recovered heat for pre-drying the fuel in the bin or predrying means. The fuel burners 14 of the steam boiler 15 are supplied with ground and dried dust fuel through a system comprising a fuel bin 1 which supplies by a conveyer 2 the raw coal to a pre-drier 3 from which it is supplied to a grinding mill, grader 5, dust separator 6, dust hopper 11 and finally carried by a conveyer 12 to a stream of primary air from a fan 13 to the burners. Combustion gases are led from an outlet 16 of the boiler to the grinding circuit to complete the drying of the pre-dried fuel, and a heat exchanger 7 which is exhausted by a fan 8 is coupled to the separator to utilize both the residual and latent heat of water vapour contained in the gases to heat water in a system operated by a pump to heat the pre-drier 3 and pre-drying means within the hopper.
Patent GB-982485-A (GB)
Title: Devices for indicating the vertical
Inventor: JOHNSON JOHN GOODE BRADY
IPC: G01C9/12
Filed: 1962-11-14
Abstract: 982,485. Plumb-rules. POLYCELL PRODUCTS Ltd. Oct. 29, 1963 [Nov. 14, 1962], No. 43042/62. Heading G1F. A device for indicating the vertical comprises an elongate flat strip 50 having a mounting 54 for a pivot pin, e.g. in the form of a bradawl, and a straight edge in the form of a longitudinal slit 53, the arrangement being such that when the body is pivotally suspended from its mounting the straight edge assumes a vertical attitude. The strip 50 may be of plastics material, metal or plywood and is provided with a scale 52. A mounting hole 54 for the pivot pin may be provided at both ends of the strip and the strip may increase in width from one end to the other. Further if desired the pivot may be in the form of a spike attached to the strip.
Patent GB-1446430-A (GB)
Title: Direction indicator systems for tractor-trailer vehicles
IPC: B60Q1/38
Filed: 1972-09-16
Abstract: 1446430 Lamp failure alarms; road vehicle signals LUCAS ELECTRICAL Ltd 20 Aug 1973 [16 Sept 1972] 43045/72 Headings G4N and G4Q [Also in Division H3] A lamp failure alarm for a tractor-trailer vehicle comprises a direction indicator switch 14 for selecting a set of three left-hand or right hand direction indicator lamps 15 or 16 mounted on the vehicle, a first pilot lamp 17 connected in circuit with the main lamps 15, 16, an oscillator 31-41 for flashing the selected main lamps, the first pilot lamp 17 and a further pilot lamp 67 via a switching device 64-66, the arrangement being such that if one of the main lamps fails, the pilot lamp 67 does not flash while the first pilot lamp 17 remains flashing at the same frequency and if more than one lamp fails, the oscillator frequency and hence the flashing rate of lamp 17 is changed. In operation, when switch 14 is closed, transistors 19, 23, 29 and 37 are turned on sequentially to energize a relay coil 34. A relay contact 42 closes to turn off transistors 19, 23 and to energize the selected side lamps and a pilot lamp 17. A second pilot lamp 67 is also turned on via a circuit 64-66. A capacitor 31 charges up via transistor 29 to a predetermined level when the transistors 29, 37 are turned off and relay 34 is de-energized to open contact 42. The selected side lamps are extinguished and transistors 19, 23 are turned on but the flashing cycle is not completed till the capacitor discharges sufficiently to turn on transistors 29, 37. If one of the side lamps has failed, a transistor 52 is rendered conducting to extinguish the second pilot lamp 67 via a charge hold circuit including a capacitor 59. However, if two of the lamps have failed, transistor 23 is not turned on resulting in the capacitor 31 discharging and charging to a higher potential. The oscillator frequency and hence the flashing rate is increased.
Patent GB-1078056-A (GB)
Title: Improvements in or relating to gain-controlled transistor mixing circuits
IPC: H03D7/12
Filed: 1964-10-22
Abstract: 1,078,056. Transistor mixer circuits; automatic gain controls. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Oct. 22, 1964 [Oct. 25, 1963; Feb. 1, 1964; Feb. 6, 1964], No. 43122/64. Heading H3T. In a gain controlled transistor mixing circuit a modulated input signal 3 and an oscillator voltage 7 are applied across the base-emitter junction of a transistor 1 by way of a non- decoupled resistor 9 in the emitter circuit of the transistor 1 and the conversion gain of the mixer stage is reduced by increasing the emitterdirect current of the transistor either directly by control of the emitter or indirectly by control of the base. An increasing input signal reduces the base-emitter junction resistance ro of this transistor so that less of the input signal and oscillator output, which are developed across ro and emitter resistor 9, take part in the mixing process. The amplification is further reduced by negative feedback produced by the IF current through resistor 9 which acts effectively as a linearization of the emitter-base characteristic. As shown the output from the detector stage 18 is amplified by an NPN transistor 25 and fed back via resistor 27 to control the PNP mixer transistor 1. To avoid modulation distortion of the I.F. output two non-decoupled resistors (45, 46) can be included in the emitter circuit of the mixer transistor 1 (Fig. 2, not shown) the output from an oscillator (36) being fed via both of these resistors to the mixer transistor. In a further embodiment (Fig. 3, not shown) a self oscillating mixer stage has an ordinary or Zener diode (35) biased by potential divider resistors (33, 34) so as to limit the output voltage of the oscillator. As a result of the linearization of the emitterbase characteristic of the mixer transistor, as the gain control progresses, the amplitude of the oscillations from the oscillator increases and the conversion gain remains substantially constant. Then, upon further control, the output of the oscillator is maintained constant by the limiting action of the Zener diode 35 so that the conversion gain decreases and delayed gain control results. The input signal and separate oscillator output can be applied to either of the base or emitter electrodes of transistor 1. Resistor 11 in the emitter circuit of the mixer transistor provides temperature stabilization of transistor 1.
Patent GB-1026806-A (GB)
Title: Receiving apparatus and frequency shift keying systems for the utilisation thereof
IPC: H04Q1/45
Filed: 1962-11-15
Abstract: 1,026,806. Data transmission. WESTERN ELECTRIC CO. INCORPORATED. Nov. 15, 1962 [Nov. 29, 1961], No. 43190/62. Heading H4P. In a frequency-shift keying data transmission system mark and space bits gate one or the other, respectively, of two synchronous pulse trains which are so related that their difference frequency is an integral multiple of the bit frequency. At the receiver two further pulse trains are derived from the received signals, these trains corresponding to the first pulse trains. Both further pulse trains are fed to individual EXCLUSIVE OR circuits to which are also fed the received signals. The output of one of these OR circuits is inverted and combined with the output from the other circuit to reproduce the data signals. At the transmitter data signals S, Fig. 1 (not shown), pass direct to gate 14, and via an inverter to gate 15. These gates are also fed with pulse trains A, B, respectively; their outputs are combined and sent to the receiver. The received signal is passed to timing circuits, which comprise filters, amplifiers and clippers, to provide pulse trains A<SP>1</SP>, B<SP>1</SP>, corresponding to A, B at the transmitter. After clipping, the signal forms an input to both EXCLUSIVE OR gates 28, 29, which are also fed with A<SP>1</SP>, B<SP>1</SP> respectively. Their outputs C, E are combined, after inverting one of them, to provide waveform F, which corresponds to the original data.
Patent GB-1073452-A (GB)
Title: A machine for manufacturing stranded ropes
IPC: D04C3/00
Filed: 1964-10-23
Abstract: A rope braiding machine comprises four vertical columns (206A..206D) located on the corners of a square each of which supports a cylindrical shaft (204) having a notched disc (201, 202) at each end and driven by intermeshing gearing (205) from an electric motor such that the discs rotate to carry in their notches a series of eight bobbin carriers in a winding path to effect braiding of the rope, Figs. 3 and 4, not shown.  The bobbin carriers are gear driven and are revolved to avoid any additional winding or unwinding being imparted to the strands whilst they are being braided.  A take-up mechanism maintains a uniform tension on the braid and a let-off pawl and ratchet mechanism is associated with each carrier to permit release of the strands as the tension increases.  A friction band restricts the unwinding of the bobbin in the carrier and a tensioning device controls the strand tension as it leaves the carrier.  The height of the die determining the position at which the braiding is accomplished is manually determined by a hand wheel raising or lowering a plate securing the die through which the braided strands pass.
Patent GB-1505688-A (GB)
Title: Non-linear type digital-to-analogue converter
IPC: H03M1/00
Filed: 1975-10-22
Abstract: 1505688 Non-linear digital-to-analogue converter NIPPON GAKKI SEIZO KK 22 Oct 1975 [24 Oct 1974] 43406/75 Heading H3H In a non linear d-to-a converter switching means 13-0 to 13-n, which may be FET's, are responsive to the control outputs 12-0 to 12-n of decoder to switch output points 0 to n of an exponential function generator 14 of the resistance ladder type where R 2  = R 2 ( 1 + R 2 /R 1 ) to a common output line. In the embodiment having m binary inputs the decoder has n + 1 = 2<SP>m</SP> outputs and exponentially related voltages are produced at the (n + 1) outputs. In a second embodiment (fig. 4, not shown) the decoder and function generator are both split in two, the analog output of the first generator serving as the voltage source of the second generator through a buffer amplifier. The converter's use in an electronic musical instrument is mentioned (fig. 5, not shown).
Patent GB-992553-A (GB)
Title: Magnetic core switching circuits
IPC: H03K3/45
Filed: 1961-12-06
Abstract: 992,553. Circuits employing magnetic bistable elements. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 6, 1961 [Dec. 29, 1960], No. 43641/61. Heading H3B. In a magnetic core switching arrangement including an output core A, Fig. 1a, a storage core B and a switching or input core C each of which has a switch control winding connected in a closed circuit SC the winding directions are such that the combination with the circuit SC permits switching of a first core only if a second core is in such a condition that it may be switched simultaneously. A signal on input winding I switches cores B and C, a signal on the drive terminal D switches cores A and B to produce an output in winding O, and a signal on the reset terminal R switches cores A and C. The magnetization sequence of the cores is described with reference to Fig. 1b (not shown) and in this arrangement the drive winding circuit includes resistors RDa, RDb which reduce the current through drive winding on core B to a fraction of that through the winding on Core A. The energy for switching core B is provided jointly by the direct drive signal and the induced signal in the circuit SC. In a modified arrangement described with reference to Fig. 1d (not shown) two output cores are provided together with corresponding drive windings the circuits of which may be combined for passage through core B. The arrangement may provide a logical "AND " circuit or alternatively a NOT-I-AND-D. A further arrangement described with reference to Fig. 2 (not shown) has the drive current applied as an alternative to cores A and C, and in a still further arrangement described with reference to Fig. 3 (not shown) equal drive current is applied to cores A and B and a reduced drive current to core C. A two by two matrix comprising two planes of toroids AO1, 02, 11, 12 A O1, 02, 11, 12; B O1, 02 and C O1, 02, 11, 12 serving as shift registers, Fig. 4, each identical and with the two output arrangements of Fig. 1d (not shown) has cardinal inputs I-1, I-2 for numerals one and two, and inputs I-t and I-U for tens and units. The number 12 being stored by simultaneous signals on I-2 and I-11 and I-1 and I t and providing a primed or unprimed output on lines O<SP>1</SP> and O by the application of driving current to windings D<SP>1</SP>-u, D<SP>1</SP>-t or D-U, D-t respectively. Employment of the basic arrangement in larger matrices and the use of single output arrangements is referred to. The two planes of cores may be mounted one on each side of a board 40, Fig. 5, with only the shortcircuiting connections passing through the board.
Patent GB-1269540-A (GB)
Title: Method and apparatus for forming silicon carbide filaments
IPC: C01B31/36
Filed: 1969-09-03
Abstract: 1,269,540. Silicon carbide filaments. COMPAGNIE FRANCAISE THOMSON HOUSTON-HOTCHKISS BRANDT. 3 Sept., 1969 [4 Sept., 1968; 26 March, 1969], No. 43709/69. Heading C1A. In making SiC filaments by pyrolysing a gaseous organosilane in contact with a heated tungsten wire moving through a reaction zone, the variation of the temperature of the wire is maintained at less than 30 C. and the reaction zone temperature is maintained substansially constant, between predetermined limits, for instance between 1200 and 1300 C. The wire is normally at 1000-1400 C. The temperature of the reaction zone and that of the wire may be stabilized by control of a heating current for the wire, by means comprising temperature sensers located selectively within the reaction zone, after a thermal equilibrium has been established within the reaction zone. After the SiC deposition step the wire may be subjected to an electrolytic treatment. Apparatus suitable for carrying out the process is shown in the Figure, in which a tungsten wire is passed through chamber 1 (for cleaning the wire in a hydrogen atmosphere) to deposition chamber 2, to which a gaseous mixture (e.g. with H 2 ) of an organosilane is fed from vessel 5, and around which is sited a thermal screen 8 and an oven 15 having a thermal gradient to compensate for heat losses and to ensure a substantially constant wire temperature. Subsequently the wire may be treated in electrolysis chamber 9. The wire is drawn through capillary tubes at the top of each mercury trap J 1 , J 2  or J 3 . Specified organosilanes are MeSiCl 3 , Me 2 SiCl 2  and Me 3 SiCl.
Patent GB-1294515-A (GB)
Title: Improvements in or relating to the fabrication of semiconductor devices
Inventor: LEPSELTER MARTIN PAUL
IPC: H01L29/73
Filed: 1970-09-15
Abstract: 1294515 Semiconductor devices WESTERN ELECTRIC CO Inc 15 Sept 1970 [15 Sept 1969] 43901/70 Heading H1K In a method of making a semiconductor device a mask comprising two layers of material having aligned apertures is formed on the surface of a semiconductor body 2, the aperture in the upper layer is enlarged so that border of the lower layer surrounding the aperture is exposed and ions are implanted into the body through the aperture in the lower layer and through the portion of the lower layer exposed by the upper layer. An N type Si body (11) is provided with a first masking layer (14) of silicon oxide by thermal oxidation or deposition, a second masking layer (15) of Al 2 O 3  or Si 3 N 4  by evaporation, sputtering or thermal decomposition, a third layer (16) of silicon oxide, and a photoresist layer (17). An aperture (18) in the photoresist allows the silicon oxide third layer (16) to be etched to form a mask for the etching of a corresponding aperture in the second masking layer (15) using hot phosphoric acid. The wafer is then etched in HF to completely remove the third layer and to etch an aperture in the silicon oxide first masking layer (14). The second masking layer 15 is then etched in hot phosphoric acid to reduce its thickness and increase the size of the aperture to provide a mask structure as shown in Fig. 1. B ions are then implanted with such an energy that they enter the silicon body through the exposed part of layer 14 to form a P type region 12, the junction 13 being passivated by layer 14. Layer 15 may be left in position or removed. The second masking layer (15) may be of a metal such as Cu, H 3 NO 4  -being a suitable etchant. Selective back sputtering may be used instead of etching to form apertures in the masking layers. Multiple masks may be provided by means of which a transistor structure may be fabricated by two successive ion implantations and a diffusion step, and such a device may form part of a junction isolated integrated circuit.
Patent GB-1291146-A (GB)
Title: Tap chucks
Inventor: MATSUMOTO MASAKAZU
IPC: B23B31/08
Filed: 1970-09-15
Abstract: 1291146 Chucks; tap-holding attachment M MATSUMOTO 15 Sept 1970 44004/70 Headings B3B and B3N A tap-holding chuck comprises a main body A (Fig. 1) and a tap holder B the latter of which comprises a clamping means (Fig. 4) for receiving the shank of a tap 33, a shank 22 received within a sleeve 21 and connected for rotation therewith, the sleeve 21 being in driving engagement with the main body via an arrangement of a clutch including a fixed ring 27 in frictional engagement with a movable ring 29 splined to sleeve 21 and urged axially against fixed ring 27 through an elastomeric ring 31. In operation, if, during rotation of the main body and tap, the load on the tap exceeds a set torque as determined by the frictional force between rings 27, 29 then slippage occurs to interrupt the drive to the tap. The force is adjusted by a ring 30. The axial position of shank 22 in sleeve 21 is adjustable by bolt 24. The shank of the tap is clamped by balls 35 in an axially movable sleeve 32 which is spring- urged to its clamping position. The tap holder B is secured in a hollow shaft 5 of the main body A by balls 17 and a surrounding spring-urged collar 19. Shaft 5 is axially slidable in bore 2 of the main body. Its axial position is determined by springs 12, 13 which normally balance each other; if, during a tapping operation, the feed rate differs from the tapping pitch, axial movement of shaft 5 is possible to compensate for such difference. Driving engagement between the shaft 5 and a body portion 1b is established by balls 6a, 6b.
Patent GB-974309-A (GB)
Title: Compositions containing hydrosulfite and their applications in chemical reductions
IPC: D06P1/22
Filed: 1961-12-08
Abstract: The surfaces of iron, stainless steel and lead are cleaned by reducing metal salts and oxides thereon with a medium containing an alkali metal or ammonium hydrosulphite and an alkali metal borohydride.ALSO:Vat dyes are reduced under conditions of aerial oxidation with a medium containing hydrosulphite ions and an alkali metal borohydride.  The medium may be an aqueous solution which may also contain NH4OH or NaOH, the pH being 9.5-13.  The preferred constituents are sodium or ammonium hydrosulphite and sodium borohydride.  The vat dyes may be applied conventionally from a bath, continuously or as the acid leuco form using a reducing bath containing NH4OH or no alkali at all, subsequently converting to the alkali leuco form before the final oxidation and finishing.  The materials to be dyed may be of natural or regenerated cellulose, cellulose acetate and triacetate, polyamide, aromatic polyester or of acrylic polymers.  When dyeing hydrophobic fibres carriers may be employed.  Vat and azoic dyeings may be stripped with a reducing medium as above which may also contain sodium lignin sulphonate and/or polyvinyl pyrrolidone.  The reducing medium may also be employed to bleach textiles and wood pulp.  Examples of vat dyeing, stripping and bleaching are given; the stripping and bleaching being applied only to cotton fabrics, the dyeing to all the materials herein before listed.
Patent GB-1333993-A (GB)
Title: Method and apparatus for monitoring vapour density in an electron  beam furnace
IPC: H01J37/305
Filed: 1971-09-22
Abstract: 1333993 Automatic control of vapour density AIRCO Inc 22 Sept 1971 [[ 12 Oct 1970] 44171/71 Heading G3R [Also in Division G1] In an apparatus, within a vapour deposition furnace for measuring the density of vapour 15, formed from material (aluminium etc:) which has been vapourized by an electron beam from an electron gun 42 directed by a magnet 51 on to the material, a light source 16 directs a light beam through the vapour along a path spaced from the electron beam path and the attenuation of a peak absorption wavelength is measured by a filter 18 and a photo-multiplier 26. The light source comprises a lamp 63 behind a rotating perforated wheel and the A.C. output of the photo-multiplier is passed, as shown, via an A.C. filter and a cathode follower to a meter 70 indicating the vapour density. The cathode follower's output can also be compared with a reference voltage by a difference amplifier 78 whose output is used to control the beam intensity of the electron beam gun and thereby ensure a constant vapour density and an even coating of a substrate 52. In a further modification monochromatic light beams from a plurality of monochromatic sources may be used the intensity of the light of the respective wavelength being detected after passing through the vapour. A dual path arrangement is also disclosed involving an extra light path which bypasses the vapour and provides a reference beam.
Patent GB-972991-A (GB)
Title: Improvements in methods of photographic reproduction
IPC: G03C1/34
Filed: 1960-12-23
Abstract: 972,991. Photographic materials and processes. KODAK Ltd. Dec. 23, 1960 [Dec. 28, 1959], No. 44324/60. Heading G2C. Photographic light-sensitive material for use in the transfer process as described in Specification 725,667 comprises a substantially unhardened silver halide emulsion layer containing a tanning developing agent, a non-tanning, self-coupling, developing agent, and a tri-alkyl or tri-phenylphosphite, the phenyl groups of which may carry substituents. The tanning developing agent is preferably 3, 4-dihydroxy-diphenyl, 2, 5-dihydroxydiphenyl, 2, 3-dihydroxy-diphenyl or 5, 6, 7, 8- tetrahydronaphthohydroquinone, but it may also be hydroquinone or pyrocatechol. The non-tanning, self-coupling, developing agent may be 4-methoxy- 1-naphthol or 8-hydroxy-alpha-naphthol. Phosphites specified for use in the invention are tri-sio-octyl phosphite, tricresyl phosphite, triphenyl phosphite, tri-(2-methoxy-phenyl) phosphite, 2-ethylhexyl-, octyl-phenyl phosphite and the trimethyl-, tri-npropyl-, tri-iso-propyl-, tri-n-butyl-, tri-n-hexyl-, and tri-2-ethylhexyl phosphites. The exposed material is developed in an alkaline solution such as aqueous sodium carbonate, as described in Specification 725,667, and pressed against a receiving sheet to transfer a thin layer of unhardened gelatin in the shadow areas. The developing solution may contain #-diethylamino-ethanol as described in Specification 945,496 or potassium carbonate/acetamide as described in Specification 933,004. Specifications 655,274 and 800,772 also are referred to.