baber/WOPTO huggingface dataset:
Patent GB-297725-A (GB)
Title: Improvements in the clouding of enamels
IPC: C03C4/00
Filed: 1928-01-24
Abstract: 297,725. Kreidl, I. Sept. 26, 1927, [Convention date]. Enamels.-Enamels are clouded by the production in the mass. of finely distributed bubbles of gas evolved during the firing of the enamel from inorganic substances or compounds which are added to the batch in the enamel mill. The substance may be adapted to liberate gases during the firing of the enamel by chemical interaation wit.h one or more other substances such as saltpetre. The insoluble residue which remains after evolution of gas is so small as to have no clouding effect. The substance may be soluble in water, or it may be of colloidal form. Examples given are metals, metalloids, and their compounds. The Specification as open to inspection under Sect. 91 (3) (a) also describes the application of the invention to the clouding of glass. This subject-matter does not appear in the Specification as accepted
Patent GB-123308-A (GB)
Title: Improvements in Electrical Condensers and Mountings therefor.
IPC: H01G4/32
Filed: 1919-01-30
Abstract: 123,308. Bosch Magneto Co., (Assignees of Heins, O., Wild, C. M., and Schwarzmann, W. E.). Feb. 11, 1918, [Convention date]. Magneto-electric machines.-A condenser of the roll type for use with a magneto has side contact terminals and has a metal band shrunk tightly round it. The condenser is formed of continuous bands 1, 2 of foil separated by paraffined paper 3 and wound on a fibre cylinder 4. The foil bands project laterally to form continuous terminals at each side. The fibre cylinder is slipped over the metal hub 5 of the terminal plate 6 and the slotted plate 7 forming the other terminal plate is held against the insulating ring 11 by the screw 13 in the metal core 12. A fibre cap 16 fits closely round the cylindrical surface of the condenser and over the plate 7, and a metal band 18 is shrunk on to the cap. Connectors 9 on the plate 7 pass through the cap for connexion to the terminal 28 of the magneto winding. A metal mounting 19 for the condenser is secured to the poles 21 by screws and dowels and a projection 10 on the plate 7 enters a bushed hole in the plate 26 to prevent any rotation. The condenser plates are clamped by means of the screw pin 34 which also serves to connect the plate 7 to the insulated element 32 of the interrupter. The terminal 28<1> of the winding and the plate 6 of the condenser are connected to the frame by the spring- pressed brush 36 and conductor 37. The earthed interrupter element is connected to the frame by the brush 38.
Patent GB-653634-A (GB)
Title: Improvements in or relating to optical systems
IPC: G02B17/08
Filed: 1948-01-27
Abstract: 653,634. Optical systems. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Jan. 27, 1948, No. 2459. Convention date, Jan. 30, 1947. [Class 97 (i)] In a system comprising a concave mirror, a transparent element correcting the spherical aberration of the concave mirror and a second, usually plane mirror located optically between them, the dimension of the reflecting or refracting surface of at least one of the elements in a direction normal to the axial plane is greater than its dimension in a direction parallel to the axial plane. The invention is described with reference to the system disclosed in Specification 605,122 comprising a concave spherical mirror 1 receiving light, for example from a cathode-ray tube, through an aperture 7 of a plane mirror 2 which directs light reflected from the mirror 1 on to a Schmidt correcting plate 3 and thence to form an image on a projection screen. To increase the aperture of the system the dimension l is made greater than the dimension h.
Patent GB-750832-A (GB)
Title: Apparatus for automatically shutting off pressure fluid conduits in the event, for example, of breakage
IPC: B60T11/32
Filed: 1954-01-27
Abstract: 750,832. Valves. SEMENITZ, C. Jan. 27, 1954, No. 2546/54. Class 135. A valve device suitable for closing a fluidpressure brake conduit in the event of breakage comprises a beam 2 held in horizontal position by a leaf-spring 25 and operatively connected to valve members 21, 22 which coact with seats 23, 24 at the ends of conduits 10, 14 leading respectively to the front and rear brakes of a vehicle. The valve members are guided either by stems 37, 38 engaging sockets in the housing or by being fixed to the beam. A passage 5 connects with the master cylinder of the braking system. Either valve member is closed by flow of fluid in the event of loss of pressure in the associated brake conduit. Engagement of either valve member with its seat completes an electric circuit to illuminate a warning lamp.
Patent GB-543418-A (GB)
Title: Improvements in or relating to hydraulic distant servo-control arrangements
IPC: B60T13/16
Filed: 1939-01-26
Abstract: 543,418. Hydraulic machines. COATALEN, L. Jan. 26, 1939, No. 2703. Convention date, March 26, 1938. [Class 69 (ii)] [Also in Group XXXIV] Pressure liquid for operating hydraulic brakes is obtained from a pump 1 controlled by a distributer 10 controlled by a pedal-operated master cylinder 33, 34. The brake wheels are first brought against the drums by liquid supplied directly by the master cylinder through pipes 50, 12 and a check valve 45. The master cylinder also exerts pressure above a piston 28 in the distributer 10 closing a ball valve 26 and interrupting the normal circulation from the pump through pipes 5, 25 and 2. The pump thereupon also exerts pressure on the brakes through a two-way check valve 18 and the pipe 12. In order that the force to be exerted upon the pedal operating the master-cylinder may be kept small the area of piston 28 is made larger than the area subjected during brake application to the pump pressure which is that of the seating of the ball-valve 26.
Patent GB-495093-A (GB)
Title: Improvements in gas fired geyser type water heaters
IPC: F24H9/00
Filed: 1937-02-01
Abstract: 495,093. Heating water. HARFORD, H. Feb. 1, 1937, No. 2891. Void. Convention date, March 23, 1936. [Class 64 (i)] A gas-fired heater with an annular water space 12 carries in the lower part a heat conductor comprising a concentric cylinder 20 connected at its top by a sealing flange 24 to the flue wall 11 from which the cylinder is spaced by vertical V-shaped heat-conducting sheet metal fins 21 ending above the bottom of the cylinder, which is open at its lower end and extends down below the water space. Zigzag radial fins 26 are sweated to the upper part of the flue wall 11 and to an upper inner cylinder 27 covered by a plate 28.
Patent GB-1412981-A (GB)
Title: Rotary piston machines
IPC: F04C14/10
Filed: 1972-01-21
Abstract: 1412981 Rotary positive-displacement fluidmachines TRADE & INDUSTRY SECRETARY OF STATE FOR 19 Jan 1973 [21 Jan 1972]  2949/72 Heading F1F In a rotating-piston machine, which may be a pump or blower, the piston 3 has a part-spherical rim 8 and flat surfaces 5, 6 with a part-cylindrical surface 7 therebetween, the casing having a flat wall 14 that causes the piston to pivot on trunnions 2 fixed to a shaft 1 when the latter is rotated by e.g. an electric motor or I.C. engine. Diametrally disposed inlet and exhaust ports, of which one is indicated at P, are formed in part-spherical portions of the casing co-operating with the rim 8, which controls these ports. The wall 14 may be replaced with a disc whose inclination can be adjusted to vary the output, Fig.4 (not shown). In another embodiment, Fig.2 (not shown), the surfaces 5, 6 are part conic and the surface 7 is part spherical and engages with a part spherical portion of a wall (16) replacing the wall 14, which portion serves as a thrust bearing. The piston may have a central cap (17), Fig.3 (not shown), made of metal-filled P.T.F.E. and serving as a journal, which engages with the wall 14. The thrust bearing or rotor portion engaging therewith may be composed of, or mounted on, a flexible and resilient material e.g. metal-filled P.T.F.E. The bearing may be composed of steel and adhesively mounted on a flexible and resilient rubber pad.
Patent GB-987211-A (GB)
Title: Improvements in or relating to television receivers
Inventor: MOTHERSOLE PETER LEONARD
IPC: H04N5/46
Filed: 1964-01-23
Abstract: 987,211. Radio receiving circuits; transistor receiving circuits; television; multiplex radio signalling. MULLARD Ltd. Jan. 23, 1964, No. 2972/64. Headings H3Q, H3T, H4F and H4L. The invention relates primarily to television receivers capable of receiving both positively and negatively modulated signals. For negatively modulated signals (" 405 ") the diode detector D1 is direct coupled, via switches S1, S2 in reverse position to that shown, to the video amplifier Vo, which then receives a wholly positively-going signal (Fig. 1, not shown). A smoothed automatic gain control voltage is derived from the resistance-capacitance network R4, C4 in the cathode circuit of this valve. For positively modulated signals (" 625 ") the diode detector D1 is coupled in reverse sense to the video amplifier Vo, via switches S1, S2 in the position shown. Direct coupling would result in a wholly negative signal appearing on the grid of this valve (Fig. 2, not shown); to prevent this, the signal is A.C. coupled over capacitor C3, and it is usual to restore the D.C. level by means of a diode shunting the grid-cathode path (Fig. 3, not shown). With such an arrangement, when a strong R.F. signal is received the final I.F. stage may become overloaded before the A.G.C. voltage can build up; due to the A.C. coupling provided by capacitor C3, no appreciable signal reaches the valve Vo and the A.G.C. circuit does not respond. To prevent this, according to the invention the D.C. level is restored at the grid of the valve Vo by means of a further detector diode D2 to which the I.F. signal is applied. A tendency for oscillations to occur due to transients when switching from one modulation system to the other is prevented by means of a parallel R.C. circuit R5, C7 in the load circuit of diode D2. When the intercarrier F.M. sound system is used, a sound I.F. trap circuit L1, C5 may precede the video detector D1, the F.M. intercarrier signal being derived from a tuned circuit L2, C6 in the output of the detector D2. If the receiver is of the hybrid type, employing PNP transistors in the I.F. stages, the A.G.C. voltage may be supplied to them via a PNP transistor inverter stage, an increase in A.G.C. voltage driving the I.F. transistors into heavier conduction so as to reduce the gain by forward A.G.C. action. In a modification, in which the video amplifier is biased back by the signal, the polarity of both diodes is reversed (Fig. 6, not shown). A detector circuit similar to that described, but with omission of the switches, may be used in a receiver for negatively modulated signals alone.
Patent GB-1303884-A (GB)
IPC: E21C41/16
Filed: 1970-01-21
Abstract: 1303884 Solution mining of minerals WINTERSHALL AG 21 Jan 1970 [21 Jan 1969 8 Jan 1970] 2996/70 Heading E1F An underground deposit of soluble salts is mined by driving from a main passage 5 a number of vertically spaced, parallel flushing levels 4; feeding water into these flushing levels so as to dissolve salts from the salt deposit panels 7 bounding the levels 4; passing the resultant solutions, except for the solution in the lowermost level, out of the levels down through passages, e.g. bores 15, connecting neighbouring flushing levels for the solutions to be enriched as they pass through successive levels; and removing from the lowest flushing level, e.g. through valve-controlled standpipes 19, near salt-saturated solution for subsequent extraction of the salts from this solution. The levels 4 are dissolved out by an apparatus comprising a movable frame 23 supporting guide tubes 25 in which spray pipes 24a, 24b are slidably supported. The spray pipes 24a, 24b are biassed against the face of a level 4 being driven by pulley, cable and weights systems, 26a, 26b.
Patent GB-827636-A (GB)
Title: Process for the extraction of pyridine and its homologues from benzene containing solutions
Filed: 1958-01-30
Abstract: Pyridine and its homologues are extracted from solutions which also contain benzene, for instance the circulation benzene from dephenolizing plants and light oil, by treating the solutions with phosphoric acid or a phosphoric acid-containing solution of ammonium phosphate, passing the solution of pyridines and phosphoric acid, which has been separated from the benzene phase, into a neutralizing vessel where it is saturated with ammonia, and passing the solution issuing from the neutralizing vessel into a distillation column where it is split up into a head product which contains pyridines, and into a sump product which contains phosphoric acid, the head product being processed for the recovery of pyridine bases, while the sump product is passed back into circulation. Preferably the phosphoric acid is diluted with water so that the volumetric ratio of acid to water is from 1 : 3 to 1 : 10.  Preferably the treatment of the initial benzene solution takes place in a rotary extractor.  The pyridine-containing head product may be cooled to a temperature below that at which condensation takes place and then passed into a separator in which it separates into an oily layer containing most of the pyridines and an ammoniacal liquor. The ammoniacal liquor may be passed either direct or after distillation or evaporation into the neutralizing vessel.
Patent GB-695224-A (GB)
Title: Improvements in or relating to the construction of model railway track
IPC: A63H19/30
Filed: 1950-12-21
Abstract: 695,224. Toy railway tracks. WRENN, C. R. Dec. 21, 1951. [Dec. 21, 1950] No. 31121/50. Class 132 (iii). [Also in Group XXV] Rails 1 of toy railway track are fastened to sleepers 2 by means of clips 4 comprising tubular thin metal eyelets which may be diametrically slotted before insertion into holes in the sleepers, tongues 4<SP>1</SP> thus formed in stems 6 then being clenched over the bottom flanges 5 of the rails and against the sides of the rails. Alternatively, the slots may be formed by pressure of the rails into the ends of the stems after insertion of the eyelets into the sleeper holes. Track sections may comprise a sheet base member, e.g. of fibre, stamped out to leave sleeper portions 2 connected by longitudinal strips 3. Curved track sections may be formed by removing some of the strips 3 at intervals and then flexing the base member, the rails sliding through the clenched tongues but being sufficiently tightly gripped to remain in the curved condition. Moulded plastic base members and metal sleepers and track sections pressed out of sheet metal are specified.
Patent GB-1368202-A (GB)
Title: Electric inverter
IPC: H02M7/757
Filed: 1972-01-24
Abstract: 1368202 Inverting systems; standby systems ALLMANNA SVENSKA ELEKTRISKA AB 24 Jan 1972 [25 Jan 1971] 3214/72 Headings H2F and H2H A standby system for use in the event of mains failure comprises two poly- or single phase thyristor converter bridges A, B each having A.C. terminals connected to output leads R, S, T, in the 3-phase circuit shown, connected to a load L, and each having D.C. terminals connected to an accumulator battery BA via respective inductances R1-R4, a capacitor bank K being connected between the A.C. leads of the two bridges as shown, the bridges being in antiparallel connection with respect to the D.C. source. In operation with the mains inputs R<1>, S<1>, T<1> functioning, both switches S1, S2 are closed and bridge B which acts as a rectifier supplies a charging current through the cell BA. Gating of the thyristors is effected by a control device SDB which is itself controlled by an oscillator which is dependent on the mains input. In the event of mains failure, the contact S1 opens, oscillator O becomes free-running and bridge A inverts the power from the D.C. source BA and supplies this to the load L. A voltage sensor SO applies a signal to comparison circuits JR-JT for comparison with a reference and error signals #UR-#UT are passed to phase shifting devices DR-DT which lie in series between the oscillator O and the control device SDA for the bridge and cause the oscillator output to be phase shifted in accordance with the error signal with respect to the input at SDB. The thyristors in each bridge are gated in the conventional manner to render bridge B a rectifier and bridge A an inverter and gating signals are applied to respective pairs of devices at intervals of 180 degrees of the inputs at SDA, SDB. According to the phase shift introduced, the available power will be shared between that passed out via R, S, T, to the load L and that retained as a circulating component between the bridges, and thus that applied to the load L controlled via this phase shift. In a modification, Fig. 4 (not shown), two units as in Fig. 1 shown are employed in parallel and connected to a common D.C. source. The phase shift between signals applied to respective control devices SDA, SDB in each unit is now maintained constant and a variable phase angle is introduced between the two units and the A.C. output is taken either as the vector sum or difference of the separate outputs. By varying the said phase angle, the magnitude of the output A.C. may be changed.
Patent GB-547804-A (GB)
Title: Improvements in or relating to automatic voltage regulating systems
IPC: H02P9/20
Filed: 1941-03-10
Abstract: 547,804. Automatic control systems. STONE & CO., Ltd., J., and NIXON, L. R. March 10, 1941, No. 3220. [Class 38 (iv)] Voltage.-Hunting in voltage regulating systems comprising variable resistance such as a carbon pile is prevented by causing transients occurring through the operations of the regulator to inject into the regulator coil a restoring E.M.F. through a transformer winding or condenser in a circuit subject to the transient and in parallel with the coil. Fig. 1 shows a D.C. generator d wherein a transformer has its primary winding t<SP>1</SP> in shunt with a carbon pile r in the field circuit and its secondary winding t<SP>2</SP> across the regulator coil c. In a modification the field winding is connected in parallel with the coil through a condenser. Fig. 3 shows a condenser k which may be electrolytic, as part of a circuit connecting the exciter d<SP>1</SP> of an alternator A in parallel with the regulator coil c, which coil is connected across the alternator through a rectifier. A transformer may be used as in Fig. 1. The Provisional Specification describes also a transformer connected between the field coil and a compensating resistance in series with the regulator coil.
Patent GB-989256-A (GB)
Title: Process for the production of ethylene oxide
IPC: B01J19/00
Filed: 1962-01-29
Abstract: Ethylene oxide is made by contacting ethylene and molecular oxygen with a silver catalyst at 150 DEG  to 450 DEG , preferably at 200 DEG to 300 DEG  C., 1 to 35 ats. absolute, in the presence of at least 15 mol. per cent of methane based on the total feed to the reaction zone.  The make-up oxygen is preferably introduced into the system together with one or more inert gases at a concentration above 85 and preferably 90 mol. per cent oxygen.  The total feed to the reaction zone contains preferably not more than 12 mol. per cent oxygen, 10 to 40 and preferably 20 to 25 mol. per cent ethylene of the total feed. The ethane content of the ethylene should be below 1 mol. per cent, preferably below 0.2 mol. per cent, which may be achieved by subjecting the ethylene feed to purification by contacting with a molecular sieve.  The invention is described with reference to a flow sheet (not shown) and contains examples which show the improvement which is achieved by the present invention over the prior art wherein either no methane is employed and the deleterious effect of the presence of ethane in the ethylene is demonstrated.
Patent GB-858732-A (GB)
Title: Apparatus for glass drilling
IPC: B28D1/04
Filed: 1959-01-30
Abstract: 858,732. Glass-drilling machines. PITTSBURGH PLATE GLASS CO. Jan. 30, 1959 [Feb. 10, 1958], No. 3340/59. Class 83 (3). A machine for drilling a hole in a glass-sheet comprises a base 12, Fig. 2, with a support 70 for holding the glass-sheet vertically by an air-operated pad 110, and a pair of opposed drill units 30 with hollow diamond-impregnated cutting-bits 62, 63. The drill-units are identical and comprise airoperated vane-type motors with combined piston- and cylinderfeed mounted in stationaryholders 33 to which a control valve 127 (for the right-hand unit), is secured. An adjustable-collar 126 on the moving part of the drill contacts valve 127 to stop rotation and reverse the feed. The forward part 50 of the drill-spindle is bored for coolant supply to the bit, and is carried by a cross-head 45 which slides along guides 25 secured to a bracket 16 carrying the drill-unit. Coolant is delivered to the cross-head through a pipe 132 (R.H. Fig. 2). The glass-sheet is positioned on the rubberbacked jig-plate 70 and clamped by the pad 110, which is pivoted through an arm 109 to the base. A linkage 98-102, Fig. 1, connects the pad to the piston 97 of a pivoted aircylinder device 92 for clamping the sheet. Operation.-A pedal initiates the automatic operation of the machine and momentarily opens a valve to supply air-pressure to move the control valves for each of the drill-units. These move up together, the clamping means also operating slightly in advance; the coolantsupply is also opened. The L.H. drill-bit 62 has a smaller wall-thickness than the opposite drill-bit 63, and the collar 123 for the former operates the valve 124 to stop rotation and reverse the feed before the bits meet. The R.H. drill continues its feed until the hole is completed, a plug of glass 152 being removed. The R.H. drill-spindle collar 126 finally operates valve 127 to stop rotation and reverse this drill, which operation also controls the unclamping and stoppage of coolant-supply. A safety valve 83 is fitted, attached to the L.H. cross-head 45 and adapted to contact a preadjusted stop-rod 89 secured to the other cross-head, so that if the L.H. unit fails to stop through non-operation of valve 124 there is no danger of the bits meeting. Coolant is discharged through a hole 14 in the base to a trough 13. U.S.A. Specifications 2,607,197 and 2,674,098 is referred to.
Patent GB-432888-A (GB)
Title: Improvements in centrifugal metal casting machines
IPC: B22D13/10
Filed: 1934-02-01
Abstract: 432,888. Casting-machines. KONINKLIJKE NEDERLANDSCHE HOOGOVENS EN STAALFABRIEKEN NAAMLOOZE VENNOOTSCHAP, Ijmuiden, Holland. Feb. 1, 1934, No. 3388. Convention date, Feb. 21, 1933. [Class 83 (i)] Moulds.-In centrifugal casting a lined flask 1 is supported by and clamped between driven and rotatable heads 3, 4, one of the heads being pressed towards the flask by yielding means. The heads engage frictionally with conical or spherical faces on the ends ot the flask by means of lugs 41, Fig. 7, which may be formed as, separated by or backed by fan blades, or a supply 45 of cooling air may be provided. The head 3 is driven through a friction clutch 7, Fig. 1, by a motor 8 and is carried by a slide 9 movable by an hydraulic cylinder &c., on a slide 10 axially of the flask to clamp it, the slide 10 being moved on the bed 11 by a lever 16 when it is desired to adjust the machine for flasks of different length and secured by bolts 20. The molten metal is supplied through the head 4 which may be removably mounted in ball bearings in a ring 21 trunnioned at 27, Fig. 3, in a yoke 28 which is pivoted at 29, pulled by a spring 34 to engage the plunger 33 of an hydraulic cylinder 32, which may be used, in place of the cylinder, &c. to clamp the flask. Forced lubrication or water circulation may assist in cooling the bearing and ring 21. The head 3 may be protected from heat radiated by the casting &c. by a plate 42, Fig. 7.