baber/WOPTO huggingface dataset:
Patent GB-566841-A (GB)
Title: High frequency amplifying system
IPC: H03F1/16
Filed: 1943-08-24
Abstract: 566,841. Valve amplifiers. STANDARD TELEPHONES & CABLES, Ltd. Aug. 24, 1943, No. 13802. Convention date, Aug. 24, 1942. [Class 40 (v)] In a push-pull high-frequency amplifier using tetrode or pentode tubes, the known neutralizing couplings including capacitors C1, C2 between each signal-grid and the anode of the other tube are supplemented by a coupling including capacitors C3, C4 between each screen-grid and the signal-grid of the other tube, the capacitors having a value equal to the screen-grid/signal-grid capacity of the tubes, and/or by a coupling including capacitors connected between each suppressor-grid and the other signal-grid, the capacitors having the value of the suppressor - grid/signal - grid capacity. The invention may be extended to tubes with larger numbers of grids.
Patent GB-1512153-A (GB)
Title: Safety belt retractor
IPC: B60R22/38
Filed: 1976-04-06
Abstract: 1512153 Safety - belt retractors AMERICAN SAFETY EQUIPMENT CORP 6 April 1976 [17 April 1975] 13844/76 Heading A3V A safety belt retractor e.g. for vehicles has inertia means 51 operative to effect locking of a reel 16 by a pawl in the event of beltwithdrawal exceeding a first predetermined rate of acceleration but, to allow essentially free initial pull-out of the belt, is also provided with locking preventing means 62, 82 which prevent operation of the inertia means 51 for belt accelerations below a second predetermined rate greater than the first while still allowing locking to occur if the second rate is exceeded. The inertia means is a plate 51 biassed by a spring 54, which determines said first rate and arranged to pivot against the bias to engage teeth on a cup member 36 so as to entrain the latter in rotation with the reel whereupon a clutch spring 35 actuates a lever 39 engaging the locking pawl at 33. The plate 51 may also be biassed by another spring 82 fixed to the plate, the combined bias of springs 54 and 82 setting said second rate, when the latter is engaged by a pivotal lever 62 mounted on the same rotating flange 50 which carries the plate 51. The lever 62 is mounted in an overcentre manner and is initially held in engagement with spring 82 by a nut 80 which is arranged to move away from the reel so as to disengage from lever 62 as the belt is unwound. The lever remains in contact with spring 82 until the belt is slightly retracted when engagement of cup member 36 with legs 70 of the lever trips the latter to the Fig. 3 position. Spring 54 may be set at 0.7g and spring 82 at 2.5g.
Patent GB-964166-A (GB)
Title: Process for the preparation of halogen substituted aromatic amines
Filed: 1963-04-08
Abstract: Halogen-substituted aromatic amines are made by the catalytic hydrogenation of nitro monocarbocyclic aromatic hydrocarbons substituted with one or two chlorine or bromine atoms at a temperature of 30 DEG  to 150 DEG C. and a hydrogen pressure of at least 7 atmospheres, preferably 10 to 40 atm., and in the presence of (a) a platinum hydrogenation catalyst, in amount providing one part by weight of Pt for every 10,000 to 100,000 parts of nitro compound and (b) 0.01 to 1.0 mole per mole of nitro compound of a cycloaliphatic nitrogen base having the formula: <FORM:0964166/C1/1> where X is oxygen or N-R, R being hydrogen, methyl or ethyl, preferably morpholine.  The process may be conducted batchwise or continuously, with or without solvents, such as water, C1-C4 alkanols, tetrahydrofuran or dioxane. The catalyst may comprise the metal alone or supported on an inert support such as carbon black or diatomaceous earth.  Adam's catalyst is convenient.  Examples describe the preparation of mono and dichloroanilines, 2-chloro-4-aminotoluene and m-bromoaniline.  Specification 859,251 is referred to.
Patent GB-643677-A (GB)
Title: Improvements in and relating to frequency sensitive circuits
IPC: G01P3/48
Filed: 1947-05-23
Abstract: 643,677. Frequency measurement. BRITISH THOMSON-HOUSTON CO., Ltd. May 23, 1947, No. 13876. Convention date, May 25,' 1946. [Class 37] In a translation circuit producing a direct voltage dependent on the variations of an input frequency the push-pull output valves 1, 2 of a square-wave generator synchronized with the frequency, are connected across D.C. supply lines 3, 4 through anode resistors 5, 6. When valve 1 is driven to cut-off by a negative halfcycle of the variable frequency square-wave signal on its grid, a positive pulse is applied through condenser 16 to the grid of valve 13, normally biassed to cut-off from line 15, and causes it to conduct, discharging condenser 7. At the same time the grid of valve 2 is driven positive, and a negative pulse through condenser 19 cuts-off valve 9, whose grid is resistance connected to its anode. Since the grid time constants are short, valve 9 resumes its conductive and valve 13 its non-conductive condition allowing condenser 7 to charge through valve 9 and rheostat 10 from the anode of valve 1 to a voltage dependent on the rheostat resistance and the square-wave period. During the succeeding half-cycle, valve 1 conducts and its anode voltage falls below the voltage on condenser 7, which retains its charge since valve 13 remains cut-off and valve 9 passes no cathode-anode current. At the same time condenser 8 is first discharged through valve 14 and then charged through rheostat 12 and valve 11 from the anode of valve 2 to a voltage dependent on the rheostat resistance and the square-wave period, similarly to condenser 7, since the charging circuits are symmetrical and function in the same manner on alternate half-cycles. During the next half-cycle condenser 7 is discharged and recharged, while the charge on condenser 8 is held. Cathode follower valves 22, 23 are energized on alternate half-cycles and are driven respectively by the voltages across condensers 8 and 7 to develop a steady direct voltage across the common load resistance 24 dependent on the square-wave period and therefore on the synchronizing frequency. The rheostats are ganged together, and determine the output voltage for a given frequency.
Patent GB-1126134-A (GB)
Title: Novel acyl ureas and process means for the production thereof
Inventor: ISLIP PETER JOHN
IPC: C07D417/04
Filed: 1967-03-23
Abstract: 1,126,134. Acylureas. PARKE DAVIS & CO. 23 March, 1967, No. 13878/67. Heading C2C. Novel compounds of formula where R is lower alkyl, α-halo lower alkyl or #-halo lower alkyl are prepared by reacting 2.amino-4-(5-nitro-2-furyl)-thiazole with an acyl isocyanate of formula RCONCO. Therapeutic compositions, which have amebacidal, trichomonacidal and antibacterial activity, and which may be administered orally or parenterally, contain, as active ingredient, a compound of the formula given above.
Patent GB-890176-A (GB)
Title: Direct current amplifier device
IPC: G01T1/185
Filed: 1960-04-20
Abstract: 890,176. Electric analogue calculating systems. BENDIX CORPORATION. April 20, 1960 [April 30, 1959], No. 13896/60. Class 37. [Also in Group XL (c)] In an amplifier of the type in which the signal to be amplified is caused to modulate a signal of higher frequency which is then amplified and demodulated, the modulating means comprises a bridge network including semi-conductor diodes operating below conduction level, as variable capacitors. The output of ionization chamber 24 is passed via cable 28 and isolating resistor 70 to a bridge modulator comprising semi-conductor arms 44, 46 and a pair of resistive arms using resistors 52, 56 and a balancing potentiometer 54. The bridge is fed with a carrier signal from oscillator 67, which may produce sine or rectangular waves, via screened transformer 64, 65, 66, the semi-conductor diodes 44, 46 being biased non- conductive and acting as potential variable capacitor. The output of the modulator is fed via a series-acceptor circuit 74, 76 tuned to the carrier frequency to A.C. amplifier 34 which is followed by a demodulator 36. The amplified signal appearing across output resistor 80 is fed back as negative feedback to the input of the modulator via lead 37. A semi-conductor diode 38 is interposed in the feedback path to give the amplifier a logarithmic characteristic.
Patent GB-619055-A (GB)
Title: Improvements in adjustable clasps for straps and the like
IPC: A44C5/24
Filed: 1946-05-09
Abstract: 619,055. Bracelet clasps. NAPPER, A. F. May 9, 1946, No. 14086. [Class 43] An adjustable clasp for a strap of the type comprising two plates 1, 2 hinged together at 3 to fold down one on to the other, one end 5a of the strap being attached, through a slot 4, to the free end of the top plate 1, the other end 5b being adjustably engaged in a slot 6 in the free end of the lower plate 2, which has a series of spaced holes 7 along its length with any one of which a spring stud 8 on the adjustable end 5b of the strap may engage, is characterised in that the stud 8 comprises a base 8a having two integral bent-up prongs 8b. The prongs are so shaped that when inserted in a hole 7, their ends expand to grip the straight sides of the hole before entering a clearance slot 11 in the top plate 1 ; the base 8a is located between two plies of material which form the strap end 5b. The plate 2 has side flanges between which the plate 1 is releasably held in the folded position by the engagement of lugs 9 on the edges of the plate 1 with slits or depressions 10 in the flanges 2a of the plate 2.
Patent GB-1493562-A (GB)
Title: Apparatus for removing baked bread from bread casing
IPC: A21B3/18
Filed: 1976-04-07
Abstract: 1493562 Removing baked bread from casings YAMAKYU CHAIN KK 7 April 1976 [5 June 1975] 14107/76 Heading B5A Apparatus for removing baked bread 2 from the casing 1 in which it was baked comprises a feed belt conveyer 3 which transports successive casings to a stop device (see Fig. 2, not shown) comprising a pair of retractable panels. The panels act upon the second casing, the leading casing being transversely transferred by a chain conveyer provided with pushers (see Fig. 3, not shown) on to the uppermost flat surface a faceted rotary body 4. The casing is retained upon the body during its subsequent rotation in direction of the arrow B by electrically controlled magnetic strips 25, and is released from the body in an inverted attitude on to a lower conveyer belt 29. A curved guide plate 28 prevents the bread from falling from the casing during the last part of the rotation. The inverted casing is transferred below a vacuum pick-up head 30 which raises the casing from the bread and laterally transfers the casing to a recovery conveyer 35. At the same time a pusher 31 interconnected with the pick-up head by a rack-and-pinion arrangement (see Fig. 4, not shown), is forwarded to push the bread on to a take-off conveyer 48. In alternative embodiments, the casings may be held upon the rotary body by suction and the pick-up head may function electromagnetically.
Patent GB-869608-A (GB)
Title: Improvements in and relating to metal cabinets and the like
Inventor: BENNETT JACK
IPC: A47B47/03
Filed: 1957-05-03
Abstract: 869,608. Cabinets. MASON & SONS Ltd., E. N. April 1, 1958 [May 3, 1957], No. 14246/57. Class 52(1). A sheet metal cabinet has back and side panels 1, 2 with interfitting margins 10, 11, the top and bottom panels having depending flanges seated in recesses formed by joggled strips 4, 15. Upper and lower front rails are secured by tongued connections to the flanged edges 12 of the side panels and receive the pintles of the door hinges. The rails preferably consist of a channel 21, Fig. 4 covered by a sprung-on capping channel 24. Shelves may be mounted on struck-out lugs 8 as in Specification 869,609.
Patent GB-1011543-A (GB)
Title: Light source emitting a continuous spectrum from visible light to the extreme ultra-violet wavelengths
IPC: H05H1/48
Filed: 1962-04-12
Abstract: 1,011,543. Supply systems for discharge apparatus. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. April 12, 1962 [April 27, 1961], No. 14254/62. Heading H2H. [Also in Division HI]  A light source for emitting a continuous light spectrum ranging from visible light to the shortest U.V. wavelengths (e.g. 100A) cornpr ses further to an auxiliary starting electrode 33, an anode 1 and a cathode 2 located within a vacuum chamber 13, and a source of energy for sustaining a spark between the anode and cathode, the source of energy comprising a capacitor 9, 10, 11 interconnecting the anode and cathode and means 29 for charging the capacitor, the inductance of the circuit through which current flows from the capacitor to sustain the spark being less than substantially 0À1 microhenry and the ratio of the inductance to the capacitance of the circuit being less than 0À2 henry/farad. The starting electrode 33 is connected through a switch 32 to a capacitor 31 charged by the source 30; this circuit is of high inductance. Light from the spark passes through aperture 24 to a vacuum spectrograph (see Division H1). The capacitor 9, 10, 11 may be 0À5 microfarad with a circuit inductance of 0À050 microhenry, the spark consuming 60,000 amps at 20,000 volts. Specification 904,410 is referred to.
Patent GB-290977-A (GB)
Title: Improvements in or relating to means for equalising the electrostatic stresses in armoured cables
IPC: H02G15/188
Filed: 1928-05-15
Abstract: 290,977. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). May 21, 1927, [Convention date]. Cable joints. - The end of a lead or other metal sheathing 1 cut away to expose the insulated conductor 2 is covered by an insulating double cone 3 of paper &c. around the greatest diameter of which is sprung a toroidal coil 5 of resilient wire or strip. Wire &c. 4 is wound on the side of the cone 3 next the sheathing 1 and is connected to the toroid 5 and sheathing 1 by collars bands, or wires 6. The construction is stated to be applicable to end sleeves for closing up the metal coverings of cables.
Patent GB-198204-A (GB)
Title: Improvements in bobbin racks or creels applicable for doubling or folding machines for silk or other yarns
IPC: D01H1/18
Filed: 1922-05-20
Abstract: 198,204. Rushton, H. May 20, 1922. Creel arrangements. - A rack or creel for machines for folding or doubling silk or other yarns comprises two members D, D<1>, connected by stretchers, and lugs d extending from one member to carry adjustable pivoted spoons E or drag wires which bear upon brake blocks f on spring bobbin-spindles F. Pins e prevent the spoons from falling below the spindle bearings. The racks are mounted below the doubling-heads and are bolted to bars B.
Patent GB-296325-A (GB)
Title: Improvements relating to signalling apparatus
IPC: B63H25/36
Filed: 1927-05-27
Abstract: 296,325. Hocken, B. May 27, 1927. Mechanical telegraphs.-An ordertelegraph signalling and indicating apparatus, of hydraulic type, is arranged to operate solely by displacement of liquid. The handle p at the transmitting station which sets one of a set of orders, for example by winding a sheet a carrying them on a roller, operates as by a screw d a pair of plungers f, g oppositely in cylinders h, j. The cylinder h is connected by a pipe line m, k<1> to the cylinder j<1> of the distant station, the cylinder h' of which is similarly connected bv pipe line m<1>, k to the transmitting station cylinder j. A handle p<1>, order sheet, and plungers f<1>, g<1> corresponding to those at the transmitting station are fitted. The pipes from the cylinders h, h<1> communicate with datum tubes n, n' having index marks for the normal level of the liquid and funnels u, u<1> for use in adjusting the level of the liquid when required. An order set by the handle p displaces liquid, say, out of cylinder h and into cylinder j thus raising the level in tube n and lowering it in n<1>. At the receiving station change of level in n<1> indicates that a signal has been sent whereupon the handle p<1> is operated to restore the level by drawing liquid from n and adding it to n<1>, this action setting the order on the indicator a<1>. At the same time the restoration of level in n warns the sender of the receipt of the order. To allow for stations at different levels, balance units l, l<1> are interposed in the pipe lines having a tube g, q<1> of small cross-section containing mercury or other heavy liquid connecting upper and lower vessels x, x<1>, w, w<1> of large cross-section so that the volume displacement of liquid will always enable the junction surfaces of liquid to remain in the large vessels. Instead of bands to carry the signals, the transmitting lever may move over a scale, and at the receiving station no scale may be used. For steering indicators, for instance, the displacer of the transmitter may be connected to the steering wheel, and a similar displacer to the rudder head. The order transmitted and received may be recorded on time-driven drums s, s<1> by markers t, t<1> carried by the crossheads to which the displacers are attached.
Patent GB-985515-A (GB)
Title: Beaded reflective coatings
IPC: G02B5/128
Filed: 1961-04-20
Abstract: A beaded coating or film comprises a binder layer which has partially embedded therein a layer of glass beads coated with an imperceptibly thin coating of an oleophobic fluorocarbon sizing agent of a nature which permits adherent bonding of the beads to the binder.  The sizing agent may be a polyvalent metal complex of a fluorocarbon monocarboxylic acid.  The beads may be embedded to between 5 and 30 degrees above their equators, having a density of at least 2,5 and a size in the range 25-150 microns diameter. The coating or film may be produced by floating the coated glass beads in a layer of a liquid organic binder and the layer is subsequently solidified, the binder being of sufficient thickness and fluidity that the beads are approximately half submerged when floated, to provide a product having a uniform closepacked monolayer of beads.  The binder may be reflective and pigmented to provide a reflex-reflective area, e.g. as a reflex reflective sign.  The coating may be transparent and formed on a reflective base or it may be formed on a removable support from which, after drying, it is stripped and may subsequently be applied to a reflective base or be given a reflective coating or plating. The liquid binder coating compositions may comprise a varnish solution of a film-forming resin or polymer, e.g. phenolformaldehyde or alkyd resin.  The coating on the beads, which may first have been given a surface treatment or coating to provide a hydrophilic or electro-negative surface, may be of a fluorocarbon co-ordination complex of a polyvalent metal and a fluorocarbon monocarboxylic acid having an oleophobic fluorocarbon terminal chain of 4-10 carbon atoms, fluorinated acids, salts, amines, quaternary ammonium salts, metal co-ordination complexes of acids, alcohols, mercaptans, acrylate and methacrylate esters and polymers, vinyl esters and polymers, urethanes and urehane polymers, examples of which are given. Wholly or partially silvered beads may be coated and if desired the silver on the portions of the beads protruding from the dried binder may be removed by acid etching.  The coating composition may be applied by spraying to an embossed metal base, licence plate, or concrete highway surface.
Patent GB-260942-A (GB)
Title: Improvement in fluid compressor regulators and unloaders
IPC: F04B27/00
Filed: 1926-06-07
Abstract: 260,942. Ingersoll-Rand Co., (Assignees of Metzgar, C. W.). Nov. 3, 1925, [Convention date]. Regulating compression.-An automatic pressure-responsive regulator and unloader is provided for the compressor cylinder having an auxiliary automatic device capable of manual control from a distance to cause the regulator to unload the compressor. The compressor may be unloaded when a second power unit, for example a mine hoist operated by the electric current which drives the compressor, is working, to minimize the peak load. The compressors A, B supplying the receiver C are driven by an electromotor J supplied from the mains K through a switch P. A mine hoist Q is operated through a motor S, starter T and switch V. A volt meter W is provided. Pipes 1-4 connect a regulator X with valves controlling clearance spaces of the compressor cylinders, and a pipe 5 connects an auxiliary casing Y to the casings o of by-pass valves. An auxiliary device Z co-operates with the regulator X, but is manually controlled by a switch p energizing a solenoid q to control the inlet and outlet of pressure fluid to a cylinder s the plunger of which may act through its rod u on the lever e which operates the rod 30 controlling, through a valve, the fluid supply to the pipes 1-4. The extent to which the rod u can rise is regulated by a set screw 9 and the compressor is unloaded accordingly when the switch is cut out. A rod 20 actuated by the auxiliary piston against a spring 16 controls the switch 12 of a circuit comprising a signal light 10 on the switchboard.
Patent GB-734119-A (GB)
Title: Agents and processes for combating fungi, yeasts, bacteria, protozoa and like micro-organisms
IPC: C07F7/22
Filed: 1952-06-06
Abstract: Seeds, bulbs and tubers are protected from attack by fungi, &c by treatment with an organic tin compound of the general formula R1R2R3SnX where R1, R2 and R3 each represent a substituted or unsubstituted alkyl or aryl radical linked by means of a carbon atom to the tin, and X represents an inorganic or organic group containing more than one atom, which is linked to the tin by an atom other than carbon. Specification 303,092, [Class 140], is referred to.ALSO:Surfaces are protected from attack by fungi, yeasts, bacteria, protozoa and like micro-organisms by treatment, for example coating or impregnating, with an organic tin compound of the general formula R1R2R3SnX where R1, R2 and R3 each represent a substituted or unsubstituted alkyl or aryl radical linked by means of a carbon atom to the tin, and X represents an inorganic or organic group containing more than one atom, which is linked to the tin by an atom other than carbon.  X may represent OH, O-acyl, O-aryl, O-alkyl, SH, S-alkyl, S-aryl, SO2-alkyl, SO2-aryl, NHSO2-alkyl, NHSO2-aryl, the alkyl and aryl groups being substituted or not.  X may also represent sulphate or nitrate.  The nature of X affects solubility.  Thus tin triethyl hydroxide and its salts are fairly soluble in water while tin triethyl oleate and linoleate are perfectly soluble in oils and solvents for paint but are insoluble in water.  The following compounds are referred to with respect to the influence on activity of the R groups: trimethyl, triethyl, tri-n-propyl, tri-iso-propyl, tri-n-butyl, tri-tert-butyl, triphenyl, tri-(dimethyl-ethyl) and diethyl-bromophenyl tin hydroxide.  The compounds may be applied by impregnating, spraying or dusting. Substances to raise the adhesive and dispersive power and inert solvents or thinners, and carriers or fillers may also be added. Solutions of tin triethyl hydroxide in water and tin triethyl acetate in acetone are mentioned for treating timber. Specification 303,092, [Class 140], is referred to.
Patent GB-333256-A (GB)
Title: Improvements in operating means for traffic warning devices
IPC: B60Q1/14
Filed: 1929-05-08
Abstract: 333,256. Scott, J. L. May 8, 1929. Road-traffic signals on vehicles.-Electricallyactuated warning devices on road vehicles, such as direction signals, are each controlled by a separate switch member 8 pivotally mounted on pins 7 on brackets 5 adapted to be clamped together by bolts 4 to embrace the steering-column. Each pivoted lever 8 has a finger-grip 9 and, when tilted, compresses a spring 10 and moves a contact 11 against a blade spring terminal 12, giving the contact 11 a sliding movement thereon, thus maintaining a clean contact.