baber/WOPTO huggingface dataset:
Patent GB-1059435-A (GB)
Title: Shaft seals for thermal machines
IPC: F16J15/40
Filed: 1965-06-17
Abstract: 1,059,435. Shaft seals. ESCHER WYSS A.G. June 17, 1965 [June 26, 1964], No. 25744/65. Heading F2B. [Also in Division F1] A shaft seal between the hot part of the housing 1 of a gas turbine and a shaft 2 comprises a stuffing box, the shaft bearing assembly incorporating a cold bearing housing 4 and a bearing bush 3, a housing 13 extending between the housings 1 and 4, the housing 13 being mounted in axially-movable and radially-fixed relationship to the housing 4 but in axiallyfixed relationship to the housing 1 and being connected to the housing 1 by means of a diaphragm 25. The housing 13 comprises a sealing part 14 and an annular part 16. The bush 3 is rigidly connected to the housing 13 and the annular space 17 is fluid-tight relative to the surroundings and to the interior of the bearing housing 4. The sealing part 14 has labyrinths 10, 11 and 12. Opening 18 in the housing 1 is confined by a hub ring 22 to which a ring 24 is secured, the diaphragm 25 securing the housing 13 to the ring 24. In the operation of the turbine, the hub ring 22 and the opening 18 become larger owing to the thermal expansion of the housing 1 and the axial distance between the housing 1 or the hub ring and the housing 4 becomes less. Owing to the low heat transmission through the diaphragm 25, the part 16 of the housing 13 expands radially less than the housing 1 and this difference in expansion is taken up by the diaphragm. The shaft bearing 3, 4 is supplied with oil by means of a pipe 7, annular space 17, which is connected to discharge pipe 31, receiving oil from groove 6 in the bush 3. Sealing air is supplied through pipe 27 to annular space 28 and traces of it flow into the turbine interior. Alternatively, traces of working medium flow into space 28 and escape into annular space 29 which is connected to discharge pipe 30. Pressure in space 17 is lower than in space 29 so that a trace of sealing air flows from space 29 to space 17. In a modification (Fig. 3), the shaft seal is applied to a steam turbine.
Patent GB-1300635-A (GB)
Title: Electronic switching of tuned circuits
IPC: H03J5/24
Filed: 1970-05-28
Abstract: 1300635 Waveband switching RCA CORPORATION 28 May 1970 [2 June 1969] 25763/70 Heading H3Q  A tuner has tuned circuits comprising capacitance, a plurality of series connected inductors 64-86, and selectively operable switching diodes 92-114 with like electrodes connected between the inductors, a bias potential 197 is selectively connected between the other electrodes of one of the diodes and a reference potential for forward biasing this diode, and an impedance means such as Zener diode 62 is connected between the series connected inductors and the reference potential so that the voltage developed across the impedance means 62 reverse biases the other ones of the diodes. The tuned circuit 24, 26, 28 and 30 of the RF amplifier 12, mixer 16 and local oscillator 14 of a T.V. receiver consist of similar variable inductance circuits, the switching diodes of which are, selectively controlled from an electronic switching circuit 198 sequentially controlled by actuation of a control button 199 or in response to remote control. Switching circuitry suitable for use in control circuit 198 is disclosedin U.S. Patent 3,264,566. The diodes 92-114 and 170-192 are selectively switched by outputs CH2-CH13 so as to tune the circuits 14-30 to VHF bands. The stabilized voltage across Zener diode 62 is applied to reverse bias the unselected switching diodes and the diodes 205, 206. The resistor 216 in series with the inductors of the oscillator tuned circuit serves to reverse bias the unselected diodes and to bias the oscillator on by line 218. For UHF reception the UHF output from 198 forward biases only diodes 205, 206 so as to connect the UHF I.F. output from a UHF tuner applied to 207 to the RF amplifier 12 and mixer 16 which act to amplify the UHF I.F. signal of the T.V. receiver. No UHF output from 198 is applied to the oscillator circuit so that no voltage occurs across resistor 216 such that the oscillator 14 is not energized. The tuned circuits 24, 26, 28 and 30 are contained in metal compartments 11, 13 and 15 to prevent undesired interaction. The RF amplifier 12 includes a daul gate tetrode insulated gate field effect transistor 50 providing output from its drain to terminal 38 and having AGC applied to its input. Resistors 194 and 196 provide shaping of the band pass characteristic of tuned circuit 26. The reverse bias applied to the switching diodes when they are non- operating minimises the shunt capacity of each diode.
Patent GB-463110-A (GB)
Title: Process of reproducing sound records or talking motion pictures
IPC: G03F3/00
Filed: 1935-09-17
Abstract: 463,110. Sound - records ; photo - mechanical printing - surfaces. CZEIJA, 0., and LIERG, F. Sept. 17, 1395, No. 25765. Convention date, Sept. 22, 1934. [Class 98 (ii)] Sound-record strips which may also bear picture records are produced by printing from a forme consisting of a long flexible strip having a printing surface of basic character with a fatty printing colour of acid character. The printing forme may be prepared by copying the record on a silver halide emulsion layer, and bleaching the developed layer with an agent containing an alkali, e.g. ammonia or borax, printing being carried out with a fatty dye ground with acidic varnish. Alternatively, a differentially hardened layer is treated with a solution of tannic acid followed by a mixture of alum and glycerine whereby basic aluminium tannate is formed in the layer. Celluloid or paper may be used as the printing base, and the forme may be employed for offset printing. The Specification as open to inspection under Sect. 91 describes also the use of strips of zinc, aluminium, or of their alloys, or of flexible material having a coating of these metals, the surface of which is prepared by anodic formation. This subject-matter does not appear in the Specification as accepted.
Patent GB-655405-A (GB)
Title: An improved device for measuring and recording variations of the frequency of alternating currents
IPC: G01R23/02
Filed: 1947-09-23
Abstract: 655,405. Frequency measurements. LANDIS & GYR SOC. ANON. Sept. 23, 1947, No. 25878. Convention date, Oct. 18, 1946. [Class 37] Apparatus for measuring the average deviation of frequency of a supply from a standard value during a fixed period comprises two series of change-over switches 2, 3, 4 and 15, 16, the former controlled by a master clock 5 to operate at the beginning of each period, and the other controlled by synchronous motors 25, 26 so that with deviation of frequency the two series of change-over switches do not operate together, and form a circuit during the overlap for a synchronous motor 17 to control a counting mechanism 28-34, a subsidiary circuit indicating whether the mains frequency is fast or slow. Switches 2, 3 are operated at the beginning of alternate periods, and switch 4 at the beginning of each period. Thus, as shown, during the first period synchronous motor 25 operates to change-over switch 15 at the end of the appropriate number of revolutions which should coincide with the end of the period. If, however, the mains frequency is high, switch 15 is operated before switch 2, causing current to flow through relay winding 18 and synchronous motor 17 drives a disc 28 the position of which is followed up by counting- apparatus 32 ... 34 driven by a servomotor 29. Relay 18 operates a switch 22 to indicate + on indicator 241. If the mains frequency is low, switch 2 operates before 15, and similar action occurs with current flowing through relay winding 19 to cause indicator 241 to show - This is repeated during the next period through switches 3 and 16. The rev. counting mechanism 28-34 may include a recording device, which may also record the readings of indicator 241. An electromagnetic indicating device 35-38 controlled by a manual switch is added to show any intentional frequency deviation. Specification 438,364, [Group XXXV], is referred to.
Patent GB-1520563-A (GB)
Title: Process for recovering crude oil
IPC: C10G1/00
Filed: 1976-06-22
Abstract: 1520563 Oil recovery MARATHON OIL CO 22 June 1976 [11 Aug 1975] 25904/76 Heading E1F In an oil recovery process, the viscosity of a micellar dispersion comprising a hydrocarbon, surfactant, cosurfactant and water is determined by the hydrophilicy of the cosurfactant. Preferably the dispersion comprises 4-20% by volume surfactant, 4-86% by volume hydrocarbon, 10-92% by volume water, 0.01-20% by volume cosurfactant and 0.001-10% by volume electrolyte. The surfactant may be anionic, cationic, nonionic or mixtures thereof and is preferably a petroleum sulphonate. The hydrocarbon may be crude oil, a fraction thereof, unreacted vehicle oil within the surfactant, synthesised hydrocarbons, or mixtures thereof; and the electrolyte may be water-soluble inorganic salts, inorganic bases, inorganic acids or mixtures thereof and is preferably ammonium sulphate or sulphite, or sodium sulphate or sulphite. The cosurfactant may be an amide, amino compound, ester, aldehyde, or ketone and is preferably an alcohol.
Patent GB-877194-A (GB)
Title: Improvements in magnifying spectacles
IPC: G02C7/08
Filed: 1959-07-28
Abstract: 877,194. Magnifying spectacles. WAH, T. K., [trading as WONG HAU PLASTIC WORKS]. July 28, 1960 [July 28, 1959], No. 25914/59. Class 97(1) A pair of magnifying spectacles comprises a main frame 2, having ear supports 4, eye piece lenses secured in said main frame, a subframe 12 having side supports 38 which are slidably mounted in guides 42 on the main frame and object lenses 16 fixed in axial alignment with said eyepiece lenses, and adjustment mechanism on said main frame for moving the sub-frame relative to the main frame. The adjusting mechanism is operated by knobs 44 and comprises in one case friction wheels, mounted on shafts on the main frame, which engage the side supports of the sub-frame and in another case (shown in Fig. 4) ratchet wheels which engage teeth in said side supports. Two pairs of eyepieces may be provided on a plate 28 which is slidable in the main frame by means of a pin 30 so that either of the two pairs of eyepieces 8a, 8b are brought into line with the eyepiece apertures 6 in the frame 2. The side supports of the sub-frame may each be in two parts hinged at 40 so that when the sub-frame is fully retracted parts of the side supports may be folded inwards.
Patent GB-1218419-A (GB)
Title: Glass production
IPC: C03B5/183
Filed: 1968-05-30
Abstract: 1,218,419. Glass manufacture. ERSTE DEUTSCHE FLOATGLAS G.m.b.H. & CO., OHG. 30 May, 1968 [7 June, 1967], No. 25929/68. Heading C1M. An apparatus for the continuous production of sheet glass comprises a melting tank having an end wall 4, an opening in the wall communicating with a feed channel 3 defined by walls 5, which channel is of smaller cross-sectional area than the melting tank, a float 6 located in the tank upstream of the wall 4 and two cooling means 7 extending between the float and the walls of the tank and being clear of the glass surface. The means 7 are preferably cooled by circulating a cooling fluid, such as water. The means 7 support the float through eyes and lugs 8, 9. In another embodiment two cooling means 17 extend through the end wall 4 and exert a holding action on the float by depending pins locating in recesses in the float. The cooling means 17 are mounted on rollers 22, 23 in guides 24 for vertical or lateral adjustment or for sideways-motion moving the float parallel to the end wall 4. Other embodiments are described in which the float is reciprocated to effect a stirring action on the glass approaching the feed channel 3. It is desired that the cooling means bring the viscosity of the glass between the float and the channel within the range 500 to 2500 poises. Mention is made of the use of the apparatus in the " float " process. The float may be coated with sheet platinum.
Patent GB-1092250-A (GB)
Title: A control circuit arrangement
IPC: H04Q9/16
Filed: 1966-06-10
Abstract: 1,092,250. Electric selective signalling. INTERNATIONAL STANDARD ELECTRIC CORPORATION. June 10, 1966 [June 14, 1965], No. 25962/66. Heading G4H In a circuit for the selective control of 100 electrical devices by two pulse trains each containing up to ten pulses, the devices are arranged in ten groups II, III &c., each having a groupcoupling switch K1. K2 &c., connected to one of ten lines common to all the groups, one of the lines being selected by a counter ZM1 responsive to the first pulse train to apply a negative pulse to the selected line to select the corresponding group, the counter being operative under the control of the second pulse train to apply a positive pulse to one of the ten lines to select one of the devices within the selected group. There are a number of transmitting devices nsi in each group connected to pulse line 12. These may be dials, and contacts S11, S12 &c., to ensure that only one transmitter is operative at any time. The pulses received in the central station I energize relay J, the contact i1 of which steps a counter ZM1. A relay V remains picked during the duration of the pulse train so that contact V1 isolates the ten contacts zm1 &c. of the counter. If the first pulse train contains two pulses, the contact zm2 is closed so that at the end of the train, when relay V drops, contact V 1  closes to apply a negative voltage to the second line. This is connected through diode G 2  to relay K 2  in the second group III. All the contacts k 21 - k 20 , k<SP>1</SP> 2  and k<SP>11</SP> 2  close, but the diodes G 21  prevent the marking on lead 2 from passing to the switching devices E 21  &c. When relay K 2  picks, contact k<SP>1</SP> 2  causes relay Q to pick and relay V picks and holds for the duration of the second train. Contact q 2  energizes the counter reset magnet ZM2. The contacts u 1  and q 3  apply a positive signal to contact V 1  so that when counter ZM1 has selected the line for the second train, e.g. line four, a positive pulse is applied to this line which passes through contact k 24  in group III and selects switching device E 22  and indicator F 24 .
Patent GB-978421-A (GB)
Title: Improvements in machines for manufacturing marking signs for electrical terminals and the like
IPC: B41F17/10
Filed: 1961-07-19
Abstract: 978,421. Cutting-apparatus. N.O.T. LOOF. July 19, 1961, No. 26119/61. Heading B4B. [Also in Division B6] A thermoplastic tape 10 manufactured by extrusion is fed intermittently by rollers 11, 12, 13, 14 beneath embossing dies 6 carried on a marking unit 3 having electrical heating means 5 and mounted on a vertically movable slide 2. The unit 3 also carries reels 8, 9 for a carbon ribbon 7. The slide is reciprocated vertically through a pivoted lever 15 by a cam 18, the slide being in its upper position when the tape is being fed and being held in its lower position, in which the dies are pressed into the tape through the ribbon, during 50 degrees of rotation of the cam-shaft 20. The roller 11 is shaped like a rotatable knife with two or more axially-spaced edges for cutting the tape into ribbons held together by material left by recesses 11a in the edges. Also mounted on the slide is a unit 4 carrying transverse knives 4a to cut partly into the tape, which can thus be divided into small units for use as marking signs for electric terminals and the like.
Patent GB-1206334-A (GB)
Title: Method of purification of trilaurylamine
Inventor: BATHELLIER A
IPC: G21F9/12
Filed: 1968-05-31
Abstract: 1,206,334. Purification of trilaurylamine. COMMISSARIAT A L'ENERGIE ATOMIQUE. 31 May, 1968 [6 June, 1967], No. 26125/68. Heading C2C. A solution of trilaurylamine in an inert organic solvent which is contaminated with dilaurylamine is purified by converting the trilaurylamine and dilaurylamine of the solution into their free amine states by a basic treatment if said amines are present as amine salts; adding in stoichiometric quantity (with respect to dilaurylamine) to the solution of free amines either a salt of trilaurylamine which is soluble in the solution but has a corresponding dilaurylamine salt insoluble in the solution or an acid which yields with trilaurylamine a salt soluble in the solution but with dilaurylamine a salt insoluble in said solution; and separating the dilaurylamine salt precipitated from the resultant solution. The organic solvent is preferably dodecane. The solution to be purified may have been used as an industrial solvent (i.e. a solution of trilaurylamine in dodecane) for the purification of plutonium in nitric acid solution. The acid may be added to the solution of free amines as the concentrated acid or a dilute aqueous acid or a dilute acid in an organic solvent. The trilaurylamine salt may be added to the solution of free amines as a solution in the inert organic solvent. The orecipitation is preferably carried out at 10 to 20 C., and the precipitate may be separated by filtration on fritted glass powder or sintered stainless steel powder.
Patent GB-518938-A (GB)
Title: Improvements in or relating to spectacle frames
IPC: G02C5/12
Filed: 1938-09-09
Abstract: 518,938. Spectacle frames. KAHNE, E., and KAHNE, M., (trading as KAHNE & SOHNE, T.). Sept. 9, 1938, Nos. 26333 and 26334. Convention dates, April 4, and July 25. [Class 97 (i)] Nose pads are made separately from the frame and are subsequently, inserted into engagement with ,recesses therein, thereby facilitating choice of pads suitable for the wearer. The pads may be held in the recesses by jamming, dovetailing, cementing, welding &c. and further secured if desired by riveting or screwing. The engaging surfaces may be corrugated to improve adhesion. Fig. 5 shows in section a pad dovetailed into the side of a rim, but the recess may be formed in the rear of the rim. The Specification as open to inspection under Sect. 91 describes also a nose pad pivotally mounted on the rim and bearing yieldingly against a spring resting in a recess in the rim. This subject-matter does not appear in the Specification as accepted.
Patent GB-1260232-A (GB)
Title: Laminated metal plates
IPC: B32B15/08
Filed: 1969-05-23
Abstract: 1,260,232. Laminates. BADISCHE ANILIN- & SODA-FABRIK A.G. 23 May, 1969 [24 May, 1968], No. 26411/69. Heading B5N. A five-layer sandwich laminate comprises outer layers of metal of thickness 0À005- 0À5 mm., a central layer of metal 0À3-4 mm. thick and intermediate layers 0À02-1À5 mm. thick of a thermoplastic terpolymer consisting of 60-90% by weight of ethylene units, 0À5- 20% by weight of units of an ethylenically unsaturated carboxylic acid and 0À5-20% by weight of units of an ester of such an acid. The outer layers may be of the same or different metal and may be foils or sheeting of copper, brass, stainless steel, silver or gold and thecentral layer may be aluminium or steel. The terpolymer of at least one of the intermediate layers particularly comprises 71-90% by weight of ethylene units, 3-9% by weight of units of an aliphatic ethylenically unsaturated C 3 -C 5  carboxylic acid (e.g. acrylic acid) and 1-20% by weight of units of a C 1 -C 8  alkyl ester of such an acid (e.g. tertiary-butyl acrylate).
Patent GB-782423-A (GB)
Title: Production of aluminium fluoride
Inventor: KNIGHT RONALD FREDERICK
IPC: C01F7/50
Filed: 1954-09-13
Abstract: Aluminium fluoride is produced by reacting at elevated temperature an aqueous aluminium hydroxide slurry and a 5-15 per cent by weight solution of fluosilicic acid.  Preferably the silicic acid is present as an 8-12 per cent by weight solution in the initial reaction mixture.  Preferred temperatures are 80-100 DEG  C., and at these temperatures stoichiometrical quantities of the reactants should preferably be used: at lower temperatures, e.g. 60-75 DEG  C., excess aluminium hydroxide is preferred.  After reaction the mixture is filtered to remove silica, preferably at or near the reaction temperature.  In order to crystallize b -AIF3.3H2O from the filtrate, the pH may be adjusted to 2.0-3.0 and the solution stirred vigorously at 80-100 DEG  C. under reflux for a long period, e.g. 20 hours.  The molten liquor may be used to wash the silica precipitate. a -AlF3.3H2O and AlF3.9H2O may be obtained by low-temperature crystallization but are metastable at 0-100 DEG  C.
Patent GB-184722-A (GB)
Title: Improvements in the manufacture of hay knives and like agricultural knives
IPC: A01F3/00
Filed: 1921-10-07
Abstract: 184,722. Tyzack, W., Tyzack, J. S., Havenhand, W. H., and Habbijam, J. H. Oct. 7, 1921. Hay-knives.-To dispense with the " box " on a hay-knife, a shoulder e is formed thereon. adjacent and equal in depth to the usual " back " or stiffening-strip b which is riveted to the knife a.
Patent GB-727508-A (GB)
Title: Improvements relating to balancing mechanisms for sliding windows
Inventor: WILLMORE PERCY ALFRED
IPC: E05F11/44
Filed: 1952-10-23
Abstract: 727,508. Vehicle &c. windows. VAUXHALL MOTORS, Ltd. Sept. 21, 1953 [Oct. 23, 1952], No. 26578/52. Class 20 (3). A balancing mechanism for a vertically sliding window such as in a vehicle comprises a pair of pivotally interconnected arms 4, 5, Fig. 1, arm 4 being pivoted at 6 to a channel section member 6A fitted to the bottom of the window pane 3 while the other arm 5 is pivoted at 7 to a fixed bracket 8, the arrangement being such that when the window is fully up the arms are fully extended in dead-centre position and cannot be shifted by downward pressure on the window, a spring 15 being provided to bias the arms 4, 5 to the dead-centre position and balance the weight of the window. The helical spring 15 has one end hooked through a hole in the bell-crank 14 forming a short extension of arm 5, the other end being hooked through an eyelet 17 on the end of a wire 18, the other end of which is secured to a similar eyelet 19 pivoted by a rivet on the arm 4, the rivet being shaped to form a stop 21. The lower end of arm 4 is of arcuate shape and is radially slit to form tabs 22 which being bent out of the plane of the arm constitute a pulley groove in which the wire 18 is seated. A tooth 24 on arm 5 engages the stop 21 in the fullyclosed position of the window. The arms 4, 5 are pivoted together by a bolt 11, a frictional washer separating the arms, and a cruciform spring washer 13 being provided to apply pressure to the pivot assembly. The pivot spindle 9 has a handle 10 inside the body-work for operating the window when the latter is fully closed and, if desired, in other positions also. In a modification, the arms 4, 5 are inverted so that the spring assembly is at the top or alternatively a torsion spring may be wound round spindle 9. In a further embodiment, Fig. 5, in which the glass 3 is guided by a run 3A on one side only above the vehicle waist line, a second run 3B being provided inside the body-work the balancing mechanism comprises two pairs of arms 4, 5, 30, 31 pivoted to the arms 27, 26, 29 and 28 respectively of an X- shaped piece 25, the arms 26, 28 being cranked at 26A, 28A respectively to prevent the arms fouling one another. Arms 4, 30 and 5, 31 are the same length so that two parallel linkages are formed, the arms 4, 30 being pivoted at 6, 32, to a window pane bracket 6A and arms 5, 31 being pivoted at 9, 35 to a fixed bracket 8. The balancing spring 36 is connected between arms 5, 31 or in a modification it may be as shown at 36A between arm 31 and a fixed point. A stop pin 29A on member 25 engages arm 31 in the closed position of the window. In a further form, a similar spring arrangement to Fig. 1 may be provided or a helical torsion spring may be employed at pivot 9 or 35. A handle corresponding to that. 10, Fig. 1, may be attached either at 9 or 35.