baber/WOPTO huggingface dataset:
Patent GB-1369564-A (GB)
Title: Method of manufacturing metal patterns
IPC: G03C5/58
Filed: 1972-05-25
Abstract: 1369564 Image intensification by electroless plating PHILIPS GLOEILAMPENFABRIEKEN NV 25 May 1972 [28 May 1971] 24624/72 Heading C7F [Also in Division G2] In the production of a metal pattern on an insulating substrate by imagewise exposure of a photo-sensitive coating on the substrate before or after treatment with an aqueous solution of a salt of a catalytic metal (an image of catalytic metal thereby being produced), rinsing with water (to remove unreduced catalytic metal salt), and treating with an aqueous electroless plating solution (to intensify the image), the substrate is treated between rinsing and plating with an aqueous solution of a material which reacts with unremoved catalytic metal ions (to suppress non- selective electroless metal plating). The suppressant may be glycine, ethylenediaminetetraacetic acid, oxalic acid, citric acid, anthranilic acid, aurexide, 8-8-hydroxyquinoline,  dimethyl glyoxime, acetyl acetone, diphenyl carbazone, α-nitroso-#-naphthol. Conditions of concentration, pH, temperature and treatment time for application of the suppressant are given. A suppressant may also be present in the electroless plating solution. The photo-sensitive coating may be of TiO 2  in a resinous binder. The catalytic metal may be Au, Pt or Pd. The plating metal may be Cu, Ni, Cr or Fe.
Patent GB-1504415-A (GB)
Title: Device for folding strip material
IPC: B65B9/06
Filed: 1975-06-09
Abstract: 1504415 Folding apparatus GD SpA 9 June 1975 [14 June 1974] 24655/75 Heading B8R [Also in Divisions D1 and B5] A device for longitudinally folding moving strip material comprises a plurality of pairs of movable members, the two members of each pair being on opposite sides of the strip causing the strip to adopt a saw-tooth cross-section, the pitch of the saw-tooth decreasing progressively as the strip passes through successive pairs of movable members until the folds come into contact at guide means further downstream. The movable members may be conical rollers 6-9 and the guide means rollers 10, 11. As shown, strips 1a, 1b are cut from a strip 1 by a knife 2, strip 1b being folded and then combined with strip la to form inner and outer wrappers of a series of packages.
Patent GB-666775-A (GB)
Title: Means for cutting material in a mould, for instance partly hardened light concrete
IPC: B28B17/00
Filed: 1948-09-21
Abstract: 666,775. Cutting material in a mould. JANHUNEN, M. Sept. 21, 1948, No. 24664/48. Class 87(ii) Apparatus for cutting material in a mould, e.g. partly hardened light weight concrete, comprises a frame 1 with wheels 7 for running along the sides of the mould and a rod 2 mounted across the frame and carrying a number of parallel knives 3 independently pivoted thereon. The knives are urged downwards towards the bottom of the mould by arms 5, which may be loaded with springs or weights, secured to the knives. Each knife is thus free to move individually against the applied load should it encounter an obstruction. The knives are spaced apart by collars which are interchangeable with others of different width to obtain different knife spacings. Certain knives may be lifted up into an inoperative position to increase the width of the pieces cut by the remaining knives.
Patent GB-518371-A (GB)
Title: Improvements in and relating to electric switches of the dolly-operated type
IPC: H01H23/08
Filed: 1938-08-22
Abstract: 518,371. Tumbler switches. GENERAL ELECTRIC CO., Ltd., and EDEN, C. G. Aug. 22, 1938, No. 24676. [Class 38 (v)] In a dolly-operated switch, the base carries no electrical parts but supports the dolly-controlling means e.g., a bared spring, the electrical parts being borne on a separate member fixed to the base, and preferably of a material different from that of the base. This member 4, shown in section in the example, is made of artificial resin, and carries a dolly 7 with under-part 8, adapted to bear against a flat spring in the base, and with cam surfaces 10, 11 for operating the spring contact-arms 13, to separate the contacts 19, 21. Specification 507,410 is referred to.
Patent GB-869591-A (GB)
Title: Monitoring equipment
Inventor: GILL JOSEPH
IPC: G08B23/00
Filed: 1959-07-17
Abstract: 869,591. Electric alarm systems. HAGAN CHEMICALS & CONTROLS Inc. July 17, 1959, No. 24703/59. Class 118. Equipment for monitoring a test point comprises a neon lamp controlled by a pair of contacts in response to a condition at the test point, a capacitor discharged by the neon when it strikes, and an output terminal to which a negative pulse is applied through a rectifier when the capacitor discharges. As described, the neons for a number of test-points are housed in an indicator unit, and the negative output pulse is fed to an alarm unit to operate an audible alarm. Alarm unit.-The alarm unit comprises a differential amplifier 11 and two relays 39, 51. A source of positive potential, for example 150 volts, is connected to terminal 23 and a second source, for example 400 volts, to terminal 44. Due to the potential divider 32, 33, the potential on the grid of valve 12 is higher than that on valve 13 and hence valve 12 conducts more heavily, biasing valve 13 off, and relay 39 operates to close contacts 81, 83. If switch 100 is closed battery 98 is connected through contacts 92 and 88 to the audible alarm 97 thus sounding it to indicate that it is working correctly. If the push-button 54 is depressed the circuit to relay 51 is completed closing self-holding contacts 87, 89 and opening contacts 88, 92, cutting off the audible alarm. Receipt of a negative-going pulse on line 26 cuts off valve 12, thus releasing relay 39 and hence disconnecting the circuit to the self-hold contact of relay 51 which also releases to initiate an audible alarm. Indicator unit.-The indicator unit of Fig. 2 comprises a pair of contacts 101, 102, which are closed when the condition being monitored attains a critical value. Terminal 75<SP>1</SP> of the indicator unit is connected to terminal 75 on the alarm, terminal 77<SP>1</SP> to terminal 77, and terminal 26<SP>1</SP> to terminal 26. Thus the positive 150 volts is connected to the point X on the one side of the neon lamp 108. Closing of the contacts 101, 102 completes this circuit to earth over lead 77<SP>1</SP>, 77, thus operating the neon lamp. At the same time the potential at point X drops due to the current taken by the lamp and a negative pulse is fed through rectifier 115 over line 26<SP>1</SP>, 26 to operate the audible alarm, as described above. On depressing the button 54 the 150 volts is disconnected from the neon by opening contacts 56, 57 and the audible alarm is switched off by closing contact 54, 55, thus switching off the alarm signals. Fig. 3 (not shown) gives a modified circuit in which the contacts 101, 102 are replaced by normally closed contacts which are opened by the condition attaining its critical value. Further modifications of the indicator are also given in Figs. 4 and 5 (not shown), where thyratrons are used to hold on the visual signal given by the neon when the condition has ceased to obtain.
Patent GB-810831-A (GB)
Title: Improvements in or relating to apparatus for and method of processing strip metal through a continuous process strip metal treatment line
IPC: C25D21/12
Filed: 1955-08-29
Abstract: 810,831. Automatic speed control systems. WEAN ENGINEERING CO. Inc. Aug. 29, 1955 [Jan. 3, 1955], No. 24709/55. Class 38 (4). In a continuous process strip metal treatment line the strip passes over a deflector roll the speed of which is controlled in dependence on a comparison between the speed of the roll and the speed of the strip. In Fig. 1 a strip of metal 1, e.g. in an electrolytic tin plating line, is drawn over rollers 2-6 by means not shown and rollers 4, 5 and 6 are driven by D.C. motors 28, 29 and 30 respectively. A direct voltage representative of the average speed of rollers 4, 5 and 6 is produced between lines 19 and 21 from tachometer generators 13, 14 and 15 and this is compared with a direct voltage, representative of the speed of the strip, produced from a tachometer generator 7 driven by roller 3. Any difference serves to control, through an amplifier 12, the voltage of a D.C. generator 27 supplying motors 28, 29 and 30. According to the setting of a potentiometer 10 the peripheral speed of rollers 4, 5 and 6 may thus be maintained constant at a value equal to, slightly above or slightly below the speed of the strip. Rheostats such as 24 permit individual motor speed setting to compensate for different roller diameters due to wear, while rheostats such as 34 permit compensation for different motor characteristics. A modification in which there is only one driven roller is described.
Patent GB-599515-A (GB)
Title: Improvements in girder type endless track for motor vehicles
IPC: B62D55/04
Filed: 1945-09-26
Abstract: 599,515. Endless tracks. SCAMMELL LORRIES, Ltd., HUGH, P. G., AND DAVIES, E. C. Sept. 26, 1945, No. 24922. [Class 79 (i)] A locked-girder type endless track comprises shoes each having a number of links inclined to the length of the track and secured to upper transverse plates and lower transverse strakes' so that the ends of the links of one shoe engage between the links of adjacent shoes and are pivoted to the links of the adjacent shoe by a transverse pin, the ends of the links being extended beyond the pivoting point to provide abutment surfaces which co-operate with a transverse member of the adjacent shoe to prevent reverse curvature of the track. Each shoe, Figs. 2 and 3, comprises a number of inclined links 6 which are stiffened by upper and lower plates 8, 9 and which carry brushes 10 and 11 for receiving the pivot pins; the links are secured together by one or more upper transverse plates 15, 16 and a channel section ground-engaging strake 5 to the upwardly inclined ends 17 of which are attached buttress members 21 which help to support the end plates 19 which embrace the wheel tyre. One end of each link is extended beyond the pivoting point, as at 22, and such extensions co-act with the under side of the transverse plates 15, 16, Fig. 1, to prevent the track taking up a reverse curvature between the wheels 1. The links 6 may be light steel drop forgings, stampings or castings. or be built up from metal plate by welding.
Patent GB-288349-A (GB)
Title: Apparatus for delivery of liquids under pressure for atomising, aerating and like purposes
IPC: B05B1/34
Filed: 1926-10-08
Abstract: 288,349. Whalley, H. G. L. de. Oct. 8, 1926. Mixing fluids in flow; mixing solids with fluids in flow.-Liquid or finely divided solid is added to the spray in an atomizer from a chamber 9 communicating, by a regulable passage 12 with the nozzle 10 on a whirl chamber
Patent GB-421841-A (GB)
Title: Improvements in or connected with valves for regenerative furnaces
IPC: F23L15/02
Filed: 1933-09-09
Abstract: 421,841. Reversing-valves for regenerative furnaces. SCHIELDROP, B. H., 88, Cassiobury Drive, Watford, Hertfordshire. Sept. 9, 1933, No. 25020. [Class 51 (i)] Double - ported valve seats for reversing-valves of regenerative furnaces are made in two separate parts, the lower part 1 being provided with a water cooling pipe 2 embedded in the seat with screw or other connections 2<a> for water pipes 7 which pass through holes 4 in the upper part 3. The upper outside edge 1<b> of the lower part 1 and the lower outside edge 3b of the upper part 3 are bevelled. The valve 6 is bevelled at its top and bottom inside edges.
Patent GB-799459-A (GB)
Title: Improvements in or relating to manufacture of platinum-containing catalysts
Inventor: HAENSEL VLADIMIR
IPC: B01J23/40
Filed: 1956-08-16
Abstract: Platinum-containing catalysts are prepared by impregnating a carrier comprising alumina with a solution of a platinum compound and then calcining, without addition of halogen to the composite, at a temperature in the range 250-595 DEG  C. in the presence of a free oxygencontaining gas to which water has been added in an amount to give the gas a water content of at least 15.78 grams per kilogram of dry gas.  The association between the platinum and the alumina is improved so that less platinum is washed off when the catalyst is treated with hot ammonium nitrate solution.  The alumina support may also contain silica, titania or boron oxide. A halogen, especially fluorine, may be present in the catalyst in an amount of 0.1-8 per cent by weight of dry alumina; the halogen may be added as a solution of hydrogen fluoride or hydrogen chloride or as an ammonium salt of these acids.  The platinum content of the catalyst is preferably 0.01-1 per cent by weight and may be introduced by mixing aqueous solutions of chloroplatinic acid and ammonium hydroxide and adding to the alumina.  The alumina may be formed by precipitation from a solution of an aluminium salt, especially the chloride, with ammonium hydroxide or carbonate; the precipitate is calcined at 535-760 DEG C., washed, and formed into pills with the aid of a lubricant.  The halogen and the platinum are added either before or after forming the pills.  Alternatively the alumina is produced in spherical form by passing droplets of alumina sol into an oil bath.  The addition of water to the oxygen-containing gas used in calcination may be effected by spraying in water or by adding steam to the gas or to the calcination zone.  The catalysts are particularly useful for the reforming of gasoline hydrocarbons in the presence of hydrogen, and may also be used in other reactions including the dehydrogenation of naphthenes to aromatics, paraffins to olefins, or mono-olefins to di-olefins, dehydrocyclization, isomerization of paraffins and alkyl cyclic compounds, destructive and non-destructive hydrogenation of hydrocarbons, oxidation of hydrocarbons to oxides and alcohols, and desulphurization of hydrocarbon mixtures.  Specification 657,565 is referred to.
Patent GB-1465447-A (GB)
Title: Radiation limiting device
IPC: A61B6/00
Filed: 1975-06-11
Abstract: 1465447 X-ray apparatus MACHLETT LABORATORIES Inc 11 June 1975 [11 July 1974] 25083/75 Heading H5R A radiation beam twisting device for use with an X-ray source comprises a frusto-pyramidal aperture defined by four tapering plates 60 to 63 pivoted at their bases and having along their slope edges arcuate teeth 96 which engage similar teeth on adjoining plate edges, the degree of engagement depending on the inward and outward movement of the plates to define the required aperture. The plates are moved as opposing pairs by the camming action of pins such as 110, 128 on members 140, 141 which are attached to plates 60, 61, against the action of springs 152, 154. The pins 110, 128 are mounted on annular members such as 120 for rotation by levers 109, 126. The X-ray source is located at the narrow end of the aperture and an adjustable exit aperture comprising two pairs of plates arranged in a rectangule can be provided at the other end Fig. 2 (not shown). The device can be attached to the casing of an X-ray tube, Fig. 1 (not shown).
Patent GB-285337-A (GB)
Title: Improvements in chain cases for bicycles and the like
IPC: B62J13/04
Filed: 1927-09-23
Abstract: 285,337. Spyker, J., Sept. 23, 1927. No Patent granted (Sealing fee not paid). Gear cases.-In chain cases for bicycles &c. of the type consisting of a covering of oilcloth, leather, waxed cloth, &c. applied to a light metal, wood, &c. frame leaving an outwardly-concaved cross-section over which the fabric &c. is stretched, the cross-section of the frame 1, Fig. 1, has the shape of a hollow crescent 2 open on the outside, enabling the edges of the covering to be stretched over and held to the inside of the crescent frame section, and the securing-means on the covering to be accommodated wholly within the crescent section and by adjustment therein to be drawn as tight as required. The closure of the covering, for example along the lower edge of the case, may be effected by means of wires 4, Fig. 5, in the edges of the covering, adapted to be drawn tight into the space 2, or, as shown, the wired edges may be clamped by means of a helical spring 9, or a bar, or a length of rubber &c. In the modification shown in Fig. 7, buttons 5 on the edges of the covering are gripped by a spring strip 9. The covering may be stretched over the frame by expanding the frame by means of screws bearing against abutments and engaging nut-like parts on the frame, the wired edges being thus tightened. The. covering may consist of several layers of oilcloth, leather, &c. connected together by intermediate layers of rubber and fibrous material.
Patent GB-418253-A (GB)
Title: Improved manufacture of composite paper
IPC: D21F11/04
Filed: 1933-09-13
Abstract: For making composite paper, aqueous emulsions of asphalt, e.g natural or petroleum asphalt softening at 55 DEG  C. having a penetration of 35 at 15 DEG  C., and a particle-size such that the dispersion is black in colour are made by stirring for one hour 1000 gms. of milk casein in 3,300 cc. of water at 35 DEG  C. and adding, whilst stirring, 80 gms. of pulverized borax dissolved in 1650 cc. of warm water, and 1650 cc. of alkaline lye containing 64 gms. of caustic potash and after thorough mixing, 400 cc. of concentrated waterglass solution is added; 500 kilos of asphalt are then heated to 130 DEG C., and a solution of 400--500 gms. of caustic soda in 400 or 500 litres respectively of water at 90--95 DEG  C. prepared.  Some suspension prepared if necessary by hand, is introduced into a steam jacketed agitator of about 300 r.p.m. 30--35 kilos of the casein mixture is added and mixed with 100 kilos of molten asphalt to form a grey-black paste indicating a desired particle size, alkaline water and further asphalt are added intermittently keeping a ratio of asphalt and water added, of \ba70/75\be or \ba30/35\be until all the asphalt is added when the rest of the alkaline water may be added in small quantities. For a thick paper lye containing 70 gms. of sodium sulphite may be used in the casein mixture instead of the caustic potash, and an additional 1650 cc. of water at 45 DEG  C. added after the waterglass, or some of the sodium sulphite may be replaced by sodium carbonate.
Patent GB-865171-A (GB)
Title: Digital-to-analogue converter
IPC: G11C11/23
Filed: 1959-07-23
Abstract: 865,171. Digital - to - analogue converters. DICK CO. A.B. July 23, 1959 [Aug. 4, 1958], No. 25370/59. Class 40 (1). A digital-to-analogue converter consists of a string of Zener diodes through which a constant current is passed to produce standard voltage steps, certain steps being cut out according to the digital input. In the form of Fig. 1, three diodes 30, 32, 34, producing steps of 40, 20 and 10 volts, are series connected with a cathode follower 10 arranged to give a constant current. Each diode is shunted by a normally non-conducting transistor 40, 42, 44 which, when conducting, shorts out the corresponding voltage step. Inputs to the transistors come from the secondaries 56, 66, 76 of transformers 52, 62, 72 to the primaries of which pulses are applied from the source 82 of digital input signals. A similar string of diodes 30<SP>1</SP>, 32<SP>1</SP>, 34<SP>1</SP> is connected to another constant current source 12 and each is shunted by a normallyconducting transistor 401, 42<SP>1</SP>, 44<SP>1</SP>. These are controlled by a further set of secondary windings 58, 68, 78 on the transformers 52, 62, 72. A signal applied to a transformer, say 52, cuts out the corresponding voltage step on the lefthand side and cuts it in on the right-hand side. The two sides are connected to the plates 84 of a cathode-ray tube so that a difference of deflection voltage of double the corresponding voltage is produced by each input signal. Thus with no signal the transistors 40-44 are non-conducting and those 40<SP>1</SP>-44<SP>1</SP> are conducting so that B-70 volts are applied to the left-hand plate and B volts to the right-hand plate, a deflection voltage of 70 volts. When a pulse is applied to transformer 52, the plate voltages become B - 30 and B - 40 a difference of - 10 volts. A similar circuit produces horizontal deflection voltages so that a pattern of 64 possible deflections is available in a matrix of 8 X 8. In a second embodiment both sets of transistors are normally off, the second string of diodes being oppositely poled so that the voltage steps produced are opposite in polarity to those of the first string. The constant current sources include transistors connected as cathode followers.
Patent GB-984330-A (GB)
Title: Improvements in or relating to electric circuits
IPC: F16K31/06
Filed: 1963-06-26
Abstract: 984,330. Valves. RACINE HYDRAULICS & MACHINERY Inc. June 26, 1963 [July 23, 1962], No. 25396/63. Heading F2V. A solenoid-actuated spool valve 17, Fig. 1, controls the flow between motor ports 37, 39, a supply port 38 and end exhaust, ports 36, 40, all the ports intersecting the bore in which slides the spool. The latter is urged leftwardly by a conical spring 30 against the action of a solenoid coil 12. The solenoid 12, Fig. 3, is connected across a supply 10 in circuit with a function-responsive switch 11, a heating coil 14, a bimetallic switch 15a and a neon light 16 with a resistor; when the switch 15a is open the resistor limits the circuit current to a value less than that required to energize the solenoid 12. Upon actuation of the switch 11, current flows through the switch 15a, coil 14 and energizes solenoid 12 so moving the spool 17 rightwardly to a control position; in this position the solenoid inductance has increased and the circuit current is reduced to a holding value, which is less than that needed for initial operation of the solenoid, and is insufficient to open the bimetallic switch 15a. If the spool is obstructed the current is not reduced and may be increased so that the coil 14 is heated sufficiently to open switch 15a, whereupon the neon lamp is illuminated.
Patent GB-381691-A (GB)
Title: Improvements relating to vehicle wheels
IPC: B60B11/06
Filed: 1931-09-14
Abstract: 381,691. Wheels. GOODYEAR TIRE & RUBBER CO., 1144, East Market Street, Akron, Ohio, U.S. A. Sept. 14, 1931, No. 25693. Convention date, Feb. 9. [Class 144 (ii).] A wheel with a plurality of rims for pneumatic tyres has the rims of different width between the tyre-engaging flanges, so that each tyre bears a portion of the load. In the case of a dual rim, the inner rim A is wider than the outer rim B. Tyres 22 of the same dimensions are mounted on both the rims but with the inner tyre, i.e. the one nearer the axle, the bead portions are further spaced apart. This increases the air volume of the inner tyre which accordingly has a greater area of contact with the road. The inner tyre can thus support the greater load which results on cambered roads. This prevents the excessive wear of the inner tyre ordinarily resulting with dual tyres.