baber/WOPTO huggingface dataset:
Patent GB-211953-A (GB)
Title: System of control for maintaining the relative speeds of a number of electric motors
IPC: H02P5/48
Filed: 1922-11-29
Abstract: 211,953. Warburton, F. G. Nov. 29, 1922. Drawings to Specification. Speed maintaining systems.-Relates to systems for maintaining constant relative speeds of running of a number of electric motors driving separate parts of paper-making and like machinery, wherein mechanism capable of varying resistance in the field circuit is operated by each working motors differentially geared to a standard speed shaft, as described in Specification 22897/14. According to the invention, the standard speed is obtained by using a number of synchronous motors each associated with and differentially geared to one of the working motors. all the synchronous motors being fed in common from a synchronous generator driven by a motor which is either one of the working motors or a separate motor. Cone pulleys provided with belt shifters allow the transmission ratio between the motors and the differential gear wheels to be varied as required.
Patent GB-1201723-A (GB)
Title: Variable frequency solid-state oscillator
IPC: H03C7/02
Filed: 1968-07-09
Abstract: 1,201,723. Gunn effect oscillators. HITACHI Ltd. 9 July, 1968 [10 July, 1967], No. 32637/68. Heading H1K. A solid-state VFO comprises a Gunn effect device in which the impurity concentration of the semi-conductor body increases continuously from the negative electrode to the positive electrode. Variation of the D.C. bias alters the effective length of the domain drift path thus varying the frequency of oscillation. As shown, Fig. 4, a high resistivity N-type GaAs layer 10 is epitaxially grown from the vapour phase on an N + -type substrate 11. The body is then heated in a sealed ampule containing Al 2 S 3  and GaAs powder to diffuse sulphur into the high resistivity layer to produce an impurity concentration varying from 10<SP>15</SP> atoms cm.<SP>-3</SP> at the interface with substrate 11 to 10<SP>16</SP> atoms cm.<SP>-3</SP> at the free surface. Electrode 12 is provided on the layer 10 by applying tin saturated with GaAs, heating and then cooling slowly to form an N-type GaAs layer 14, vapour depositing a tin layer 15, and alloying-in a gold layer 16. Electrode 13 is provided on substrate 11 by plating with a nickel layer 17 and a gold layer 18. The impurity diffused into layer 10 may also be selenium, tellurium, or silicon. The semiconductor material may also be N-type InP or CdTe.
Patent GB-961491-A (GB)
Title: A process for preparing l-glutamic acid
IPC: C12P13/14
Filed: 1962-08-24
Abstract: L-glutamic acid is produced by cultivating a micro-organism capable of producing L-glutamic acid in the presence of, as carbon source, beet molasses or cane molasses which has been treated with a peroxy compound. Peroxy compounds include hydrogen peroxide, peracids, and persalts, e.g. persulphates.  The molasses may be diluted with water and contacted with hydrogen peroxide for 40 hours. Micro-organisms mentioned are Brevibacterium lactofermentum strain No. 2256, Brevibacterium flavum strain No. 2247, Brevibacterium roseum strain No. 7.  Specifications 873,448, 876,943, 889,187 and 905,973 are referred to.
Patent GB-1580919-A (GB)
Title: Baking finishes comprising acrylate and epoxy resins
IPC: C08L63/00
Filed: 1977-08-04
Abstract: The low-solvent baking finishes contain an acrylate resin, an epoxy resin and a mixture of organic solvents. The acrylate resin is a copolymer containing 10 to 35% by weight of alpha ,ss-olefinically unsaturated carboxylic acids as copolymerised units, and having a K value (according to Fikentscher) of below 15 and an acid number of between 70 and 250 mg KOH/g. The epoxy resin contains at least two oxiran groups per molecule. The mixture of organic solvents contains 20 to 80% by weight of a solvent or solvent mixture having a boiling point between 100 and 280 DEG C and a dielectric constant between 2 and 4.99 and 80 to 20% by weight of a solvent or solvent mixture having a boiling point between 80 and 200 DEG C and a dielectric constant between 5 and 27. The baking finishes of the invention are suitable for example for producing coatings for domestic appliances and automotive base coatings.
Patent GB-351877-A (GB)
Title: Process for the separation of potassium aluminates and phosphates
IPC: C01F7/02
Filed: 1930-10-31
Abstract: Potassium aluminate and phosphate in solution, which may also contain potash or potassium carbonate, are separated by passing gaseous ammonia therein, whereby separation into two layers occurs.  The top layer contains nearly pure aluminate, and the bottom nearly all of the phosphate with some aluminate, the quantity of the latter increasing with the concentration of the solution.  The layers are separated, and then to complete the separation of the salts, the bottom layer may be diluted with water and treated with ammonia as above.  Ammonia is driven off from the respective solutions by heat for re-use, and the solutions worked up to tripotassium phosphate, and alumina and potassium carbonate by know methods.  The initial solution may be obtained by treating iron-aluminium phosphate with caustic potash, and removing the insoluble residue, or by leaching the product obtained by calcining iron-aluminium phosphate with potassium carbonate, or with potassium sulphate and carbon, or with potassium chloride and carbon in the presence of steam.  The layers are distinguished by possessing different refractive indices, the upper layer by volume being about ten times that of the lower.
Patent GB-1147599-A (GB)
Title: Method for fabricating semiconductor devices in integrated circuits
IPC: H01L21/00
Filed: 1966-07-21
Abstract: 1,147,599. Semi-conductor devices. TEXAS INSTRUMENTS Inc. 21 July, 1966 [2 Aug., 1965], No. 32872/66. Heading H1K. A semi-conductor device in an integrated circuit is made by forming an apertured mask on a semi-conductor substrate, etching through the apertures to form cavities the edges of which are overhung by the masking material, and then depositing first and second semi-conductor layers in the cavities so that the first layer extends up to the masking material, which covers the interface between the two layers. A typical embodiment, Fig. 11, is made from a high resistivity P-type silicon wafer 8-12 mils thick with 110 or 101 crystallographic planes lying in its faces. This orientation enables symmetrical cavities to be etched through apertures formed by photoresist and etching steps in a silica layer formed by heating in steam or deposition. N+ layers 162, 164 and N layers 166, 168 are then epitaxially deposited on the cavity walls. Preferably the etching and deposition steps are performed in the same vessel using the reversible reaction between silicon tetrachloride and hydrogen on the one hand and hydrogen chloride and silicon on the other, the direction of which is determined by the relative amounts of the various reactant gases, the dopants phosphine and borane being introduced to dope the deposited silicon N- and P-type respectively. When the second layer refills the cavities deposition is stopped and base and emitter regions 170, 178 are then formed in the N-layer in one cavity by successive diffusions through oxide masking. During the base diffusion P-type guard rings 176 intercepting the surface inversion layers 177, and a resistive track 172 are also formed and a low resistivity collector contacting layer 180 is formed at the same time as the emitter. Finally collector, base and emitter electrodes 184, 186, 188 and resistor terminals 190, 192 are deposited through further oxide masking 182.
Patent GB-268854-A (GB)
Title: Improvements in or relating to steam generators or water heaters
IPC: F22B1/26
Filed: 1925-12-30
Abstract: 268,854. Clarkson, T. Dec. 30, 1925. Feedwater, heating.-An oil fired boiler A of the thimble-tube type described in Specifications 108,177, [Class 123 (ii), Steam generators]; and 211,342, 244,930, and 244,931 is fed with water from a feed heater B, which is also of the thimble-tube type and is heated by the hot gases from the boiler mixed with the exhaust gases from an internal combustion engine. The boiler outlet flue D and a gas engine exhaust pipe F open into a chamber E, from which the mixed gases are led through a contracting passage E<3> to the gas inlet chamber of the feed heater. The exhaust pipe and the inlet passage of the burner heating the boiler may be connected by a valve controlled bye-pass as described in Specification 267,641. Instead of leading the hot gases from the heater B directly into the atmosphere, they are conducted, according to a modification, into a third heater of the thimble-tube type which is connected to supply hot feed-water to both the main boiler A and the heater B, which then serves as a steam generator. When the main boiler is not working, the damper D<1> in the outlet flue is closed and the plant is heated by exhaust gases alone.
Patent GB-919427-A (GB)
Title: Improvements in or relating to alternating current generators
Inventor: GLEDHILL JOE
IPC: H04M19/04
Filed: 1961-09-14
Abstract: 919,427. Frequency changing. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. Sept. 14, 1961, No. 32924/61. Class 38 (2). [Also in Group XXXIX] Alternate cycles of a 50-cycle mains supply are inverted to produce a waveform of 25 cycles suited for ringing current. As shown in Fig. 1, mains is connected to transformer winding WA. Output is taken from a centre-tapped winding WC, one cycle being delivered with contacts RA1 made, and the next cycle finding contacts RB1 made, and so on. The output waveform has two positive-going 50-Cycle halfcycles side-by-side followed by two negativegoing half-cycles and so on. Contacts RA1 and RB1 are controlled by a bi-stable circuit using transistors TX2 and TX3. Positive half-cycles from winding WB of the mains transformer cut off a normally bottomed transistor TX1 and the resulting 50-cycle square waveform is differentiated by capacitor C2. Rectifiers MR1, MR2 isolate the bi-stable circuit from negative inputs so that once in each mains cycle a positive spike switches the bi-stable circuit. Relays RA and RB are, therefore, operated alternately to reverse alternate mains cycles. The relays may be reed relays where the current required is small. A single relay with change-over contacts may be used. The 12 volts supply for the relay control circuit may be automatically disconnected when ringing is not in. demand.
Patent GB-604853-A (GB)
Title: Improvements in or relating to radio-receivers or amplifiers arranged to be fed from direct current mains
IPC: H02M1/14
Filed: 1945-12-06
Abstract: 604,853. Valve circuits for radio reception. PHILIPS LAMPS, Ltd. Dec. 6, 1945, No. 33018. Convention date; Aug. 28, 1940. [Class 40 (vi)] A radio receiver is fed from direct current mains 1 through a filter comprising chokes 3, 4 and electrolytic capacitors 5, 6. A relay coil 9 in the cathode lead of one of the valves 2 controls contacts 7 so that only if the polarity of the supply is such as to cause anode current to flow in valve 2 are capacitors 5, 6 connected in circuit, thus saving damage to the capacitors due to reverse connection. Further contacts controlled by relay 9 may serve to mute the loud-speaker until the relay has operated. Grid bias for one or more valves may be taken from coil 9.
Patent GB-769599-A (GB)
Title: Improvements in ottoman bed
IPC: A47C17/23
Filed: 1954-11-15
Abstract: 769,599. Bed settees. BEBRY BEDDING CORPORATION. Nov. 15, 1954 [Dec. 3, 1953], No. 33028/54. Class 52 (2). An ottoman convertible into a bed has a foldable frame 11 consisting of an inner end section 38, a short intermediate section 39, a long intermediate section 40 and an outer end section 41, the section 38 being supported on crossed bars 42, 43 pivoted by pins 44 and connected by pins 45 to the side flanges of section 38 and by pin and slot 53 and at their lower ends by pin and slot connections 50, 52 to the rails of the ottoman frame 10 so that when the bed is collapsed section 38 is lowered into the ottoman, section 39 takes up a vertical position therein, section 40 is inverted over section 38 and the end section 41 is supported thereabove and supports a cushion to serve as the ottoman seat. A head board 100 is fixed between side members 101 on pivots 102 and is moved into position by links 104, 105, 108.
Patent GB-630483-A (GB)
Title: Rotary pumps for liquefied gases
IPC: F04D5/00
Filed: 1947-12-15
Abstract: 630,483. Centrifugal pumps; stuffing-box substitutes. LINDE AIR PRODUCTS CO. Dec. 15, 1947, No. 33056. Convention date, Jan. 9. [Classes 110(i) and 122(v)] The shaft bearings, which are of the ball or roller type, are free of lubricants and are exposed to the liquefied gas being pumped. The bearings may be of stainless steel. In a two-stage pump, Fig. 1, impellers 14, 15 are carried by a sleeve 17, being separated by a spacer ring 22 and clamped by a nut 24 against a shoulder 23. A nut 31 threaded on the pump shaft 18 holds the inner race of a ball-bearing 19 against the shoulder 23 and holds the sleeve 17 against a shoulder 30. An interstage seal ring 53 is carried by a partition 16. The sealing means may comprise labyrinth grooves 51 on either or both the seal ring 53 and the impeller 15. Alternatively, labyrinth grooves may be provided on either or both the spacer ring 22 and the adjacent surface of the seal ring 53. When grooves are provided on one member only, they may be helical or spiral. Additional sealing is provided by close clearances between the impeller 15 and the partition 16 and between a partition 41 and the shaft 18. In a singlestage pump, Fig 5, the impeller 103 is clamped between spacer rings 106 and 107 against a shoulder 108 by a nut 109. The nut also secures the inner race of a ballbearing 114 and a slinger disc 113. The slinger disc flings solid particles outwards to prevent them from reaching the bearing 114, and is preferably tapered at the periphery. Sealing grooves 130 may be provided on either or both the surfaces of the ring 106 and a partition 128.
Patent GB-282065-A (GB)
Title: Improvements in absorption refrigerating systems
IPC: F25B17/02
Filed: 1927-12-07
Abstract: 282,065. Electrolux, Ltd., (Assignees of Munters, C. G.). Dec. 8, 1926, [Convention date]. Refrigerating, absorption systems for.-Apparatus working on the reversing system and comprising a generator-absorber 12 and condenserevaporator 13 is provided with two closed pipe systems 35, 36 and 40, 41, containing a volatile medium such as ammonia, methyl chloride or sulphur dioxide, undergoing evaporation and condensation for condensing the refrigerant indirectly by the atmosphere and conveying the cold due to evaporation to the space 11 to be cooled. The generator-absorber and the condenserevaporator are connected by a single flow and return pipe 32 which may be provided with gills 33 forming an air-cooled rectifier. The pipes 35, 36 and 40, 41 may be coiled to increase their surfaces. During the generating period the pipe system 35, 36 only is effective, the part 35 serving as evaporator and the part 36 as condenser, while during the absorbing period only the pipe system 40, 41 is in action. The vessel 13 is surrounded by insulation 34. The generator-absorber may have fluted walls and is surrounded by a heatinsulated jacket 18. It has a central open passage 15 and may be heated by a gas burner 20. The heating period is controlled by a thermostatic element 28 in the liquid space of the generatorabsorber connected to the chamber of a diaphragm 25 acting on the spindle of the burner supply valve 23 against the action of a spring 30 to cut off the supply at the upper limit of temperature. The generator-absorber may be cooled during the absorption period by air, or by a water spray or water coil. In the latter case the water supply valve may be actuated by the thermostat. The Specification as open to inspection under Sect. 91 (3) (a) comprises also apparatus as above duplicated to provide continuous refrigeration. This subject-matter does not appear in the Specification as accepted.
Patent GB-741668-A (GB)
Title: Improvements in and relating to fittings for building structures
Inventor: SCREEN WILLIAM JOHN LESLIE
IPC: F16B5/02
Filed: 1952-12-31
Abstract: 741,668. Clamp fastenings. GRILL FLOORS, Ltd. Dec. 31, 1953 [Dec. 31, 1952]. No. 33134/52. Class 44. A clip for securing a panel composed of spaced metal strips 10 to a support 12, e.g. a bracket, comprises a block 16 having a pair of upstanding walls or ridges 22 designed to lie one on each non-adjacent side of a pair of adjacent strips 10 in the panel, and means e.g. a bolt 18 and nut 20, for deforming a plate 24 arranged between the walls or ridges 22 so as to cause the edges 26 of the plate 24 to grip the said pair of strips and press them tightly against the walls or ridges 22, a member 30 also being provided for pressing the panel tightly against the support 12. The member 30, as shown, is a bar welded to the head of the bolt 18 and is prevented from rotation by projections 34 on the under side of the block 16. To prevent the plate 24 slipping under the strips 10, grooves 28 and provided adjacent the walls or ridges 22 to receive the lower edges of the strips. If the strips 10 are other than parallel in the panel the walls or ridges 22 are arranged at a corresponding angle.
Patent GB-323086-A (GB)
Title: Improvements in hasp fastenings for expansible suit and attache cases, boxes, trunks and the like
IPC: E05B65/50
Filed: 1928-11-13
Abstract: 323,086. Cheney, C. W. Nov. 13, 1928. Hasp fastenings for expanding suit-cases &c. have a fixed guide member a with side grooves a<2> in which slides a member c having pivoted thereon the hasp proper d. The eye or slotted peg d<3> for engagement with the usual fastening or lock may be carried directly on member d, Fig, 3, or hinged thereon, Fig. 8. Guide a has ratchet teeth or perforations a<3> adapted to be engaged by a pin e on a plate-spring e<2> secured within the hasp member when member d is moved to engage the eye d<3> with lock &c., spring e<2> also serving to throw member d outward when the fastening is released.
Patent GB-1477052-A (GB)
Title: Connection of a tiltable metallurgical vessel to a support
IPC: C21C5/50
Filed: 1974-07-26
Abstract: 1477052 Supports for converters FRIED KRUPP GmbH 26 July 1974 [28 July 1973] 33201/74 Heading F4B A converter or other metallurgical vessel is supported in a trunnion ring by a first group of supports lying in the plane of the axis of the vessel and of the trunnions, comprising pivoted connections and, when the vessel is vertical, transferring only the weight component of the load, and a second group of connectors transferring the tipping moment part of the load. A lug 7 on the side of the trunnion ring 2 opposite the drive mechanism is pivoted between two brackets 8 secured to the vessel and a link arm 9 is pivoted between brackets 13 on the vessel and between brackets 11 on the drive side of the trunnion ring 2. Abutments 14, 15 and 16, 17 on the vessel co-operate with lugs 7 and 18 above and below the trunnion ring opposite the drive side, Fig. 2, and abutments 19, 20 co-operate with the brackets 11 at the drive side, Fig. 4, to transfer lateral thrusts. The abutments 14-17 on the trunnion ring to transfer the tipping moments may be replaced by cables 25 each surrounding one half of the converter, Fig. 6, and secured to abutments 30 on the trunnion ring.
Patent GB-410524-A (GB)
Title: Improvements in vacuum cleaning apparatus
IPC: A47L9/20
Filed: 1932-11-24
Abstract: 410,524. Air filters. McCARDLE, L. F., Welbeck House, Durweston Mews, London. Nov. 24, 1932, No. 33244. [Class 8 (ii).] The filter bag d of a vacuum cleaner is supported by a ring resting on the neck of a dust container c and extended by a spring ; the motor A rests on the ring and is clamped thereto depressing a rod k bolted to the rigid base of the bag. After removal of the motor, the rod is oscillated causing the spring to shape and clean the bag, the dust falling into the container. The rod is then retracted and held in position by a pin passing through a slot in the rod and held by a bridge n, so that the bag is enclosed within a sleeve p. The filter is then removable without soiling the hands, and the container may be emptied.
Patent GB-486733-A (GB)
Title: Improvements in or relating to electric level indicating apparatus for liquids
IPC: G01F23/44
Filed: 1937-12-02
Abstract: 486,733. Actuation of switches. FARFALLINI, I. Dec. 2, 1937, No. 33319. [Class 38 (v)] [Also in Group XXXVIII] In a liquid-level indicating system, the indicator is operated by a multi-position switch is comprising a contact arm 8 rotatable over a series of contacts 12 by the spindle 7 of a spring drum 6 which is connected by a cord 4 to a float (not shown). The spindle 7 is provided with a conical boss which co-operates with a seating on the bush 3 to provide a tight closure between the chambers which accommodate the drum 6 and the switch.
Patent GB-376624-A (GB)
Title: Improvements in and connected with hinges
IPC: E05D3/10
Filed: 1931-12-01
Abstract: 376,624. Hinges ; stays. SMART, J., 40, Regent House, Commercial Road, Stepney, London. Dec. 1, 1931, No. 33332. [Classes 65 (i) and 65 (ii).] A door hinge has a pair of links each pivoted to the other and to the upper or lower edge of one of the hinge plates, so that when the door is closed the links fold against one another between door and doorpost, and the links limit the opening of the door. As shown in the Figure, 1, 2 are the hinge plates, connected by a pin 3 ; hinged to the upper or lower edges of the members 1, 2 are triangular plates 9, 10 respectively, these two plates being hinged together at 14. The axes of the four hinges all intersect in a common point. The plates 9, 10 are provided with abutting edges at the hinge 14 to prevent them from coming into the same plane. As the door is closed, the plates 9, 10 fold away from the hinge plates and are concealed between the door and door post ; the Figure shows the hinge in the open position, with the plates 9, 10 acting as a stay to limit the opening. The hinge plates 1, 2 may have lugs 6 as shown to embrace the corner of the door and door-post and give a stronger attachment.
Patent GB-506750-A (GB)
Title: Improvements in or relating to self-winding reels for flexible electric conductors
IPC: H02G11/02
Filed: 1937-12-02
Abstract: 506,750. Self-coiling reels; taking-up slack'of flexible conductors.. DADINA, P. L. Dec. 2, 1937, No. 33406. [Class 99 (ii)] [Also in Group XXX] A self-coiling reel 1 for the flex 6 of a telephone, flat iron, &c. is rotatably mounted in a casing 20 which is provided with a bracket 23 and clamping screw 24 for securing it to a table and with a plug adapter 18, 19 which is connected by a length of flex to a wall supply-plug.. The outer end of the flex 6 is fitted with an adapter 22, and the inner end is connected to slip rings 12, 13 on an axial extension 27 of the reel, the wire 8 by a metal strip 10 to the ring 13 and the wire 9 by a strip 11 to the ring 12. In the form shown in Fig. 1, the slip rings are surrrounded by ring brushes 14, 15 carried by rigid arms 16, 17 pivotally mounted on the terminals 18, 19, but the brushes may be connected to the terminals by short flexible conductors, or alternatively, the reel may be vertically movable in its casing with the slip rings resting in forked contact members fixed to the bottom thereof. The spring 4 of the reel is,mounted in a housing 5 on one of the flanges 2 of the latter, the inner end of the spring being secured to the non-rotatable spindle (not shown) of the reel and the outer end to the flange 2.