baber/WOPTO huggingface dataset:
Patent GB-1235247-A (GB)
Title: Feedback speed control
IPC: H02P7/295
Filed: 1969-08-26
Abstract: 1,235,247. Automatic control of speed. SKIL (NEDERLAND) NV. Aug.26, 1969 [Oct.24, 1968], No.42486/69. Heading G3R. The speed of a series motor 21, 22 is controlled by adjustment of the firing angle of a semiconductor (thyristor) 20 by a circuit 32 responsive to the voltage on a capacitor 30, which voltage is derived by subtracting the motor back e.m.f. from a reference voltage which is a fraction of the supply voltage, during those half cycles when the thyristor can conduct. The reference voltage appears across resistor 27 in the potential divider chain 25, 26, 27 and field 22. During the half cycles when the point 29 is negative capacitor 30 is short circuited through a diode 31; as 29 goes positive, 30 is charged as stated above until the potential at 29 reaches the threshold point of a breakdown diode 33, thereby triggering thyristor 20, and this occurs later in the half cycle the greater the back e.m.f. The charging rate also depends upon the setting of variable resistor 25, which hence operates as a speed control and may be combined with an on/off slide switch 12, which in its extreme right hand position short circuits thyristor 20 by line 35 to provide full wave, uncontrolled, energization. In one modification Fig.2 (not shown) resistor 27 is connected to the opposite side of motor field 22 and in another Fig.3 (not shown) the diode 31 is connected in series with a resistor across resistor 27; this has the effect of allowing a negative charge to appear on capacitor 30 which depends upon the back e.m.f. and this must be cancelled before the critical positive voltage is reached so that this arrangement is more sensitive to the back e. m.f. The motor may drive a grinder or saw.
Patent GB-976184-A (GB)
Title: Improvements relating to machines for the production of tufted carpets
Inventor: LORD JACK PRICE
IPC: D04H11/04
Filed: 1959-12-15
Abstract: Relates to machines of the kind shown in Specifications 658,791 and 704,335 for making pile fabrics by folding yarns between blades on an endless chain and applying a backing to the peaks of the resulting corrugations in the yarns.  According to the invention, the chain is advanced by a fluted roller meshing with the roots of the blades where they are hinged together to constitute the endless chain; the roller is driven intermittently through a one-way clutch acting as a ratchet, backlash being prevented by another one-way clutch.  To cater for expansion of the endless chain as the machine warms up, the fluted roller is adjustable longitudinally of the machine by manually-operated screw devices.  Specifications 976,181, 976,182, 976,183 and 976,185 also are referred to.
Patent GB-1488364-A (GB)
Title: Presser device for overedge sewing machine
IPC: D05B29/06
Filed: 1974-10-02
Abstract: 1488364 Presser device for overedge sewing machine SINGER CO 2 Oct 1974 42713/74 Heading DIG A presser device 20 for an overedge sewing machine comprises a presser arm bar 35 pivotally supported at one end for movement about vertical and horizontal axes (40, 39), biassing means 47-54 acting on the other end of the presser bar arm, a leaf. spring 27 pivoted at one end with the presser bar arm to pivot therewith and having a presser foot 21 at the other end and a lateral projection 42 formed on the presser bar arm 35 extending over and contacting the leaf spring 27 between its ends. The horizontal pivot is provided by a rod 39 movable by a knee control so that the presser foot may be raised from the work.
Patent GB-1013145-A (GB)
Title: Improvements in or relating to gas cell frequency standard systems
IPC: H03L7/26
Filed: 1961-11-29
Abstract: 1,013,145. Automatic frequency control systems. SPACE TECHNOLOGY LABORATORIES Inc. Nov. 29, 1961 [Nov. 29, 1960], No. 42737/61. Heading H3A. In a gas cell frequency standard system a microwave reference frequency is frequency or phase modulated at an audio frequency to produce an audio frequency error signal used to control the reference frequency, and an error signal at a harmonic of the audio frequency is used in conjunction with the first error signal to widen the range of modulation when the reference frequency is outside the normal pull-in range. In Fig. 1 the output of a voltage variable oscillator 22 is amplified at 24 and fed to a frequency multiplier 30 which also modulates the signal in accordance with the output of an audio frequency oscillator 44. The audio frequency should be between 30 and 120 cycles/sec. and is preferably 107 cycles/sec. A harmonic generator 32 generates a high harmonic of the output of multiplier 30, this harmonic being of the same nominal frequency (6834 megacycles) as the atomic resonance of the resonant medium 14 (e.g. rubidium) in the gas cell. The medium 14 is situated within a microwave cavity 18 supplied with the signal from generator 32, and is optically pumped by a lamp 10, the output of which passes through the medium to a photo-detector 20. The output of the detector at the 107 cycle modulation frequency is shown at curve A of Fig. 3 as a function of the microwave frequency. Curve B shows the error signal at the 214 cycle/sec. harmonic, this signal being generated automatically by the phase modulation of the microwave signal. The two error signals pass from the photocell to an amplifier 46, and the 107 cycle signal passes to a synchronous detector 48 and is used to control the frequency of the oscillator 22. The error signal A is ambiguous in that it is zero if the frequency is f 0  or if the frequency lies outside the range b of Fig. 3. To resolve this ambiguity both error signals A and B are passed to a unit 50 which produces a low output only if (a) signal A is less than the value V 1  and (b) signal B is greater than V 2 , these conditions corresponding approximately to the range a. If the output is high, a signal passes via unit 52 to cause the detector 48 to pass a signal to the amplitude control unit 54 to increase the amplitude of modulation and thereby widen the pull-in range. When the frequency is within the range a the modulation amplitude is reduced to a low value to give sharp signal definition.
Patent GB-935606-A (GB)
Title: A process for the production of cross-linked polyurethanes
IPC: C08G18/10
Filed: 1961-11-30
Abstract: Cross-linked polyurethanes are prepared by reacting (a) a storable reaction product containing hydroxy and/or amino groups which is obtained from (i) a polyhydroxy compound having a molecular weight above 1,000, (ii) a compound having two hydrogen atoms reactive towards isocyanate and of molecular weight below 500 and (iii) an organic diisocyanate in an amount less than that stoichiometrically necessary to react with the hydroxyl groups of the polyhydroxy compound (ii) and the active hydrogen atoms of compound (iii), with (b) a polyisocyanate (iv) and a diamine of the general formula: <FORM:0935606/IV(a)/1> (in which R represents an alkyl radical and R1 represents a halogen atom), heating and shaping.  The polyisocyanate (iv) is used in a quantity in excess of that necessary to react with all the hydroxyl and/or amino groups of the reaction product (a) and with all of the amino groups of the diamine of the above formula. Starting materials other than the diamine are exemplified in the parent Specification.  In the examples a prepolymer prepared by reacting a polyester from adipic acid and diethylene glycol, butylene-1,4 glycol and toluylene diisocyanate is cured by reaction with di(3-methyl-4-amino-5-chlorophenyl)-methane and (1) diphenylmethane4,41-diisocyanate or (2) toluylene-2,4-diisocyanate by heating under pressure in moulds.
Patent GB-1382048-A (GB)
Title: Randomnumber generators
IPC: G06F7/58
Filed: 1971-09-15
Abstract: 1382048 Random number generators INTERNATIONAL COMPUTERS Ltd 18 Sept 1972 [15 Sept 1971] 42902/71 Heading G4A A pseudo-random number generator has an adder 41 which successively adds a plurality of multidigit uniform random numbers and a counter 12 which counts the number of carry signals delivered by the adder, the outputs 44 of the adder and counter constituting an output pseudo-random number. Two recirculating shift registers 30, 32 provided with feedback paths and exclusive-OR gates 31, 33 in conventional fashion, produce pseudo random pulse sequences. The outputs of selected stages of the registers 30, 32 are combined in further EX-OR gates 35-39 to provide a 4-bit input number and a carry input to the adder 41, the latter ensuring that the average number added is a whole number. The adder outputs are applied to an accumulator 43 which returns its output to the adder for the next addition. The accumulator thus sums a number of random numbers determined by a register 11. As each number is added a counter 10, starting from the value in register 11, counts a clock pulse; when counter 10 is full it trips a flip-flop 14 to signal that a suitable number is ready at the output 44 and to inhibit the clock pulses while the number is read. The numbers released at 44 will have a Gaussian distribution; to correct any tendency to produce an excess of low numbers the input to adder 41 from gate 39 is inverted. If it is desired to shift the distribution the counter 12 may be loaded with a preset number before each cycle starts.
Patent GB-1277043-A (GB)
Title: A-nor-steroids
Inventor: PRINCIPE PACIFICO ANTHONY
IPC: C12P33/00
Filed: 1969-08-28
Abstract: 1277043 A-Norsteroids E R SQUIBB & SONS Inc 28 Aug 1969 42941/69 Heading C2C The invention comprises compounds of formula (wherein R is H or acyl) and their preparation from 17α-hydroxy-A-norprogesterone by enzymatic hydroxylation with Colletotrichum linicola to give 13α,17α - dihydroxy - A - norprogesterone which, after 15-monoesterification, is heated in the presence of a base to give I(R=H) which may then be acylated to give I (R=acyl).
Patent GB-1131582-A (GB)
Title: Improvements in filters for liquids
IPC: B01D35/00
Filed: 1966-09-27
Abstract: 1,131,582. Disposable filters. FILTERWERK MANN & HUMMEL G.m.b.H. 27 Sept., 1966 [28 Sept., 1965], No. 42968/66. Heading B1D. In a disposable filter of the kind having the rim 5 of a thin sheet metal housing I seamed to a thin walled cover ring 6 which is connected through a relatively thick walled cover plate 7 to a connection member 10, the cover ring is rigidly connected to the cover plate by tongues 15 on the radially inner rim of the ring engaging through inlet apertures 13 in the cover plate, the tongues being bent back at 16. Liquid to be filtered flows from inlet cavity 14 through apertures 13, radially inwardly through annular filter element 4, the filtrate leaving through axial bore 11. Sealing rings 12 are provided between the connection member and the ring and between the cover plate and an annular filter element end plate 4a. The cover plate screws onto the filtrate outlet.
Patent GB-973274-A (GB)
Title: Improvements relating to the coating of paper
IPC: D21H25/14
Filed: 1960-12-14
Abstract: Proteins are peptized in solutions of salts.  In examples: (D) casein, soap and tributyl phosphate are added to an aqueous solution of ammonium nitrate and dicyandiamide and heated until thoroughly dispersed; (G) water, casein, ammoniumnitrate, dicyandiamide and soap are agitated together until the casein disperses; (H) as G, save that the dicyandiamide and soap are left out; (I and J) as G, save that sodium nitrate and ammonium chloride respectively replace the ammonium nitrate.  Fluorides, bromides and iodides may also be used. Compositions for coating paper (see Division B2) comprise proteins, peptized as above or by alkali, styrene-butadiene copolymer latex and mineral pigment.  In examples: (A) soy protein is dispersed in water with ammonium hydroxide and urea, and the pigment is clay; (B) as A save that the pigment is clay and calcium carbonate; (D and F) casein is peptized with ammonium nitrate as above, and the pigment is clay; (C and E) as A and D respectively, save that the pigment is clay and calcium carbonate; (K) casein is peptized as at (I) above, the pigment is clay and tributyl phosphate is also present; and (L) clay is dispersed in water with the aid of tetrasodium pyrophosphate, casein is dispersed in water by heating with dicyandiamide, soap, tributyl phosphate and ammonium hydroxide, these two liquids are then mixed and styrenebutadiene latex added.  Specifications 854,501 and 966,225 are referred to.
Patent GB-1084747-A (GB)
Title: Process and device for splitting mica plates
Inventor: JANICSEK FERENC
IPC: B28D1/32
Filed: 1964-10-22
Abstract: 1,084,747. Splitting mica. EGYESULT IZZOLAMPA ES VELLAMOSSAGI RESZVENYTARSASAG. Oct. 22, 1964, No. 43202/84. Heading B5E. An apparatus for splitting mica blocks comprises a first splitting knife 1 having an opening 4 for directing compressed air into an incision made by the knife, a pair of additional splitting knives 2 arranged to be inserted into the incision together with the first knife and then forced apart as the insertion continues, and a pair of lever-arm members 3 arranged to enter the incision and, during the latter part of the movement of the knives, to be moved so as to separate an upper layer of mica from the block. The knives 2 are pivoted on pins 7 fixed in a slide which is movable between stationary portions 14, pins 8 being fixed in the latter portions and adapted to co-operate with curved surfaces 15 on the knives 2. The slide and the elongated members are moved via rotary cams 6, 12. The mica block is held on a table 16 by means of suction via holes 17. The blocks are transferred to the table by means of an arm 19 controlled by a rack-and-pinion 22, 23, the block being held on the arm by suction; a similarly actuated arm 24 is provided for removing the upper layer of mica and a further rotatable suction arm 25 for removing the remaining finished block from the table 16. The operation of the machine may be carried out fully automatically.
Patent GB-1087395-A (GB)
Title: Improvements in or relating to piston-and-cylinder devices
IPC: F25B9/06
Filed: 1964-10-23
Abstract: 1, 087, 395. Reciprocating piston compressors and hot gas engines. PHILIPS' GLOEILAMPENFABRIEKENN.V. Oct. 23, 1964 [Oct. 25, 1963], No. 43333/64. Headings F1N and F1S. The working piston 2 of a compressor or hot gas engine having a working space 3 is reciprocated in a cylinder 1 and is sealed thereto by a rolling diaphragm 8 engaged by liquid contained in a cylinder space 4 defined by a second piston 5 connected to driving means or means to be driven, a regulating device being provided which maintains a constant pressure difference across the diaphragm to prevent over stressing thereof. The device comprises a pump 9 for supplying liquid to the space 4 through a pipe 10 and a diaphragm 13 subjected on one side to the pressure in the working space 3 and on the other side to the pressure of the liquid in the space 4. The diaphragm 13 is loaded by a compression spring 18 and carries a valve 16 arranged to open an outlet 17 when the pressure in the space 4 is to be reduced. Compression springs 19 are disposed between the pistons 2, 5. The diaphragm 8 may be inverted in which case the springs 19 are tension springs. The surfaces 20, 21 on the cylinder 1 and piston 5 are equal in area so that the volume between the pistons 2, 5 remains constant during operation. In Fig. 4 (not shown) an alternative regulating device is disclosed which comprises a hollow pin fixed to the working piston and having a transverse hole for the discharge of liquid from the space 4 when the spacing between the pistons exceeds a predetermined amount. Reference has been directed by the Comptroller to Specification 1, 015, 266.
Patent GB-1057403-A (GB)
Title: Derivatives of colchicine and thiocolchicine
Inventor: MULLER DR GEORGES
IPC: A01N45/02
Filed: 1964-10-23
Abstract: Novel compounds of Formula I <FORM:1057403/C2/1> in which R is hydrogen or a C1- 18 acyl group, R1 is a C1- 18 acyl group, and R2 is a alkoxy or C1- 6 alkylthio group, are prepared by subjecting a compound of Formula I in which R is a methyl group to the action of chloride of a tetravalent metal as catalyst, whereby the 1-methoxy group is dimethylated, and, if required, the resulting product is simultaneously or subsequently reacted with a lower acylating agent.
Patent GB-970206-A (GB)
Title: Improvements in or relating to the production of polyurethane plastics
IPC: C08G18/08
Filed: 1962-11-16
Abstract: Polyurethane plastics are produced by a process which comprises mixing a linear polyhydroxy compound having a molecular weight of at least 600 with an organic di-isocyanate and a chain extending agent, conducting the reactive mixture on to a heated plate, removing the hardened mass formed and subsequently processing the mass under heat and pressure, wherein there is employed as the chain extending agent a mixture of a difunctional organic compound containing active hydrogen atoms which are reactive with -NCO groups and a trihydric alcohol containing secondary hydroxyl groups as its sole groups reactive with -NCO groups, in an amount such that the molecular weight per branch point of the product is 5,000 to 100,000 and the -NCO to OH ratio is from 0.95 to 1.15. Linear polyhydroxy compounds specified are polyhydric polyalkylene ethers, polyhydric polythioethers, a hydroxy polyester prepared by reacting a dihydric alcohol with a dicarboxylic acid, polyacetals and carbon monoxide-olefin polymers.  Difunctional chain extending agents specified are diols, diamines and aminoalcohols. Trihydric alcohols specified are 1,3,5-trihydroxycyclohexane, the reaction products of trihydric compounds with at least three mols of an alkylene oxide that gives secondary hydroxyl groups, castor oil, blown tung, linseed poppyseed, hempseed and soya oils, polyesters from a trihydric alcohol and an hydroxycarboxylic acid. Many organic di-isocyanates are specified.  If desired, the reaction may be moderated by the addition of an acid such as citric acid, or the reaction may be accelerated by the addition of tertiary amines or organo-tin compounds.  The products are useful as motor mounts or in the form of extended filaments for weaving into girdles and elastic stockings. Examples are given of the preparation of the hardened mass suitable for treatment by heat and pressure.  Specifications 700,608, 700,609, 700,610, 770,633 and 798,209 are referred to.
Patent GB-1133612-A (GB)
Title: Improvements in or relating to tractor hitches
Inventor: DEST JEAN-CLAUDE VAN
IPC: B60D1/46
Filed: 1964-10-27
Abstract: 1,133,612. Tractor power lift mechanisms. MASSEY-FERGUSON S.A. 26 Oct., 1965 [27 Oct., 1964], No. 43714/64. Heading A1P. A hitch for use with a tractor having pressure control when drawing a semimounted or trailed implement or trailer comprises a U-shaped frame 18 pivoted on the draft links 10 and, at its upper end, connected to the lift arms 16 by a U-shaped frame 30 and connected to the attached implement by a chain 33. Because of its connection to the lift arms, the frame 30 moves fore and aft as the lift arms are moved thereby pivoting the frame 18 to tension or slacken the chain 33. The frame 30 is connected to the frame 18 by a universal joint and the chain is connected to the frame 18 in such a way that the connection is severed if an overload occurs. In an embodiment, the frame 18 is replaced by a strut having a pulley which co-operates with a cable extending between the lift arms and the implement.
Patent GB-1282152-A (GB)
Title: A continuous process for the partial crystallisation of a liquid and apparatus therefor
IPC: B01D9/00
Filed: 1969-09-04
Abstract: 1282152 Crystallizing UNION RHEINISCHE BRAUNKOHLEN KRAFTSTOFF AG 4 Sept 1969 [4 Sept 1968] 43810/69 Heading BIG [Also in Division C5] Partial crystallization of a liquid is effected by passing the liquid through a crystallizer comprising a pipe circuit through which the liquid being crystallized is circulated, said circuit having a liquid feed inlet 8, a slurry outlet 19, and at least one cooled section which has an external cooling jacket, an internal rotary wall scraper, and rotary conveying means to effect the circulation of the liquid, the scraper and conveying means being combined on a common driving shaft. As shown, the circuit has two cooled sections comprising two cooling jackets 2 and 11 and two conveyor/scrapers 3 and 12, of longer length, on two shafts 5 and 14; and the outlet pipe has an enlarged further crystallization section containing a stirrer 18 also on shaft 14. An extension piece may be fitted between the inlet and the first cooled section. The volume of liquid delivered to the circuit may be 1/30-1/2 of the volume of material being circulated. The viscosity of the circulating material may be suitably measured and controlled. The crystals may be separated by centrifuging or by passage through a conical screw conveyor having a perforated jacket. p-xylene may be crystallized in two stages. In the first, the separated crystals are washed with melted crystals and the wash liquor recycled together with fresh material. In the second stage, after the washed crystals have been melted, the first stage is repeated in further apparatus, the mother liquor being recycled to the first stage.
Patent GB-896499-A (GB)
Title: Cable cutting tool
Inventor: TEMPLE ROBERT
IPC: B23D15/14
Filed: 1960-12-21
Abstract: 896,499. Cable cutters. MINE SAFETY APPLIANCES CO. Dec. 21, 1960, No. 43874/60. Class 83 (4). [Also in Group XXI] A cable-cutter operated by a cartridge 37 containing a bullet 36 comprises a cutter 10 with a piston 11 slidable in a barrel 6, a cartridge holder 38 in a chamber 7 communicating with the barrel, means 25 for firing the cartridge, and passage means 42 connecting the base of the holder 38 with the barrel 6 and of a size such that the explosion gases rupture the cartridge case at the passage means and escape to the barrel to drive the cutter towards the cable 3. The cutter coacts with a die 16 engaging screwthreads in the end of the barrel recessed at 15 to receive the cable. Plungers 12 biased by a spring 13 hold the cutter in its withdrawn position. The holder, in sections to facilitate removal of a spent cartridge from which the end of the holder prevents escape of the bullet, may have four gas openings 42 leading into axial passages 43, 44 in a part of the holder having an annular recess extending between flanges 39, 40. An opening 18 admits the gas behind the piston. The firing pin 24 is operated, against the pressure of a spring 27, by a solenoid 29 and is mounted on the chamber 7 by a screwthreaded ring 21. A recess 41 in the holder 38 facilitates its removal for re-loading. The cablecutter may be mounted on the lifting boom (Fig. 1, not shown) of a helicopter. If the cutter is not arrested by impact between the piston 11 and the cylinder head, the end of the cutter may strike the bottom of a die (Fig. 9, not shown) secured by a cap.
Patent GB-900267-A (GB)
Title: Improvements in or relating to friction rollers
IPC: D01H5/76
Filed: 1960-12-22
Abstract: 900,267. Bearings. GRACIA, L. V. Dec. 22, 1960 [Dec. 28, 1959], No. 44038/60. Class 12 (1). [Also in Group VIII] A roller is supported at each end by a bearing comprising a bronze bush 4 surrounded by a spiral spring 6 housed in a support 5. Electrical contact rings 8, 11, mounted on insulating rings 14, also surround the bush 4 and the contact rings 8, 11 have terminals 9, 12 connected by wires to a signalling device. Radial displacement of the roller causes engagement of the contact rings 8, 11 so that the electrical circuit is closed and the signal is given. Each bearing has an end cover 15 thereon. The roller comprises a series of replaceable roller sections connected by a metal shaft 1. Each section has an inner metal tube 16 surrounded by a core of resilient material 2 having an exterior layer of synthetic plastics material thereon. One of the bearings may be replaced by any conventional bearing which allows lateral movement of the shaft.