baber/WOPTO huggingface dataset:
Patent GB-1504673-A (GB)
Title: Folding boat propeller
IPC: B63H1/24
Filed: 1976-07-19
Abstract: 1504673 Folding propeller D W BECK 19 July 1976 [23 July 1975] 30000/76 Heading B7V In a folding propeller assembly comprising two blades 12, 14 pivotally mounted by a pin 16 on a hub 10, the blades are so shaped and weighted that the centre of hydrodynamic force C.A. (Fig. 3) is closer to the pivot axis than the centre of gravity C.G. so that the moment about the pivot axis due to centrifugal force acting on each blade when the assembly is rotated either in the reverse or forward direction, exceeds the moment due to the hydrodynamic force causing the blades to unfold. When the assembly is not rotating, the blades are maintained in the folded condition due to the flow of water past the assembly.
Patent GB-738136-A (GB)
Title: Sulphonic acid esters of substituted 4-ketonaphthalene-1-ols
Filed: 1953-10-30
Abstract: The invention comprises sulphonic esters of 1,4,4a,5,8,8a - hexahydro - 2 - alkoxy - 4a - methyl - 4 - keto - naphthalene - 1 - ols of the formula <FORM:0738136/IV (b)/1> in which R is an aromatic hydrocarbon group or a camphoryl or halocamphoryl group and R1 is an alkyl group of 1-5 carbon atoms.  They are made by treating the corresponding naphthalene-1-ols with a sulphonyl halide of the formula R-SO2-X (X being chlorine or bromine) in presence of a tertiary amine.  Examples are given of the preparation of compounds of the above formula from certain combinations of naphthalene-1-ols in which R1 is methyl, ethyl, propyl, isopropyl, butyl, isobutyl, or pentyl and sulphonyl chlorides of the following radicals:-phenyl, tolyl, ethylphenyl, cumyl, hexylphenyl, xylyl, cymyl, mesityl, triethylphenyl, diphenyl, a - or b -naphthyl, methylnaphthyl, tert.-butylphenyl, or d- or l-camphoryl-10, camphoryl-p , and the 3-bromo- or chloro-derivatives thereof.  The products are useful as plasticizers for cellulose nitrate and are intermediates for the production of steroids.  By reductive deacylation with zinc and acetic acid, the corresponding 1,4,4a,5,8,8a - hexahydro - 2 - alkoxy - 4a - methyl - naphthalene - 4 - one is obtained, which is converted with excess lithium aluminium hydride in ether to the corresponding 1,4,4a,5,8,8a - hexahydro - 2 - alkoxy - 4a - methyl - naphthalene - 4 - ol, which may be hydrolysed and dehydrated to the 1,2,4a,5,8,8a - hexahydro - 4a - methyl - naphthalene-2-one. Specification 739,183 is referred to.
Patent GB-957482-A (GB)
Title: Heavy-duty mixing condenser
IPC: F28B3/04
Filed: 1961-08-21
Abstract: 957,482. Contact condensers. LICENCIA TALALMANYOKAT ERTEKESITO VALLALAT. Aug. 21, 1961 [Aug. 26, 1960], No. 30043/61. Heading BIB. In a contact condenser, for use with large steam turbines, the cooling water is injected in the form of flat, vertical sheets of water, the surfaces of which are approximately parallel to the flow of steam, so that a large surface area of water is brought in contact with the steam without substantially impeding the flow of steam. Steam entering the condenser via pipe 1, Fig. 1, and duct 2 is condensed by the flat vertical sheets 13 of cooling water emanating from nozzles 10 placed in the walls 9 of the chambers 4 and 4a, each chamber being supplied with cooling water through an inlet 5. These flat sheets of cooling water are produced by setting the nozzles 10 at an inclined angle (Fig. 4) to the walls 9 so that the jets of water strike the deflector plates 11 at a shallow angle. The nozzles 10 are so arranged in the walls 9 as to provide the maximum number of sheets of water 13 parallel to one another in the condenser, Fig. 3. Each sheet of water traversing the spaces between the chambers 4 and 4a is prevented from striking a wall 9 by the corres-, ponding guard wall 14, thus ensuring that the cooling water in chambers 4 and 4a is not preheated before being injected into the condenser 3. Arrangements may be made to evacuate the space between walls 9 and 14, so as to reduce heat transfer from walls 14 to walls 9 to a minimum. The heated water that strikes walls 14 flows into sump 7, and the condensate thus obtained is removed via outlet 8. Another method of obtaining a flat turbulent sheet of cooling water, Figs. 7 and 8, comprises arranging the nozzles 12 in pairs so that the water issuing from one nozzle immediately strikes the water issuing from the other nozzle at an acute angle, thus producing a combined stream of water in the form of a sheet 13. Two modifications of the contact condenser are also described.
Patent GB-174436-A (GB)
Title: Improvements in machines for printing from engraved plates or dies
IPC: B41F1/00
Filed: 1920-10-25
Abstract: 174,436. Waite, F., and Waite & Saville, Ltd. Oct. 25, 1920. Embossing. - In machines for printing from engraved plates or dies, of the type in which the die is face downwards during the printing operation, the die 3 is supported in a carriage 2 which is adapted to travel, after each impression, from the printing position, up an inclined path where the inking, scraping, and wiping operations are performed. The die-carriage is supported and guided by antifriction rollers in grooves 4a of the inclined guides 4, and is connected by rods 19 to operating-levers 18, pivoted at c, so that the outer ends thereof follow a path approximating to that of the die-carriage. The levers 18 are actuated from a crank-pin 12, rotating about the main shaft B of the machine, through the medium of a rod 13, lever 15, cam 16, spring-connection 16<a>, and connecting-rod 17. The upper surface of the die-carriage is of step formation s, t, and cooperates with a similar construction h, k of the cross-head C of the machine, which thus supports the carriage during the printing operation, performed by a rising plunger, but does not interfere with the movements of the carriage. A plate 30, attached to the cross-head, prevents the die from being pushed too for forward, and the lattter is held in position during printing by the compression of the spring 16<a> due to the completion of the movements of the lever 15.
Patent GB-657811-A (GB)
Title: Improvements in or relating to chlorinated polymerized methacrylates
IPC: C08F8/20
Filed: 1946-10-09
Abstract: A polymerized aryl or alkyl methacrylate is dissolved or dispersed in a liquid medium and then treated with chlorine gas at a temperature above 60 DEG  C. until at least three chlorine atoms are substituted in each structural unit of the polymer.  Methacrylates of methyl, ethyl, butyl, isobutyl, octyl, octadecyl, and hydroabietyl alcohols and of alkenols are specified.  Carbon tetrachloride, chloroform and acetic acid may be used as liquid media.  The solution or dispersion may be preheated and light may be used during the chlorination as catalytic agent.  Separation of the chlorinated polymer may be effected by adding methanol, water or an aliphatic hydrocarbon, or pouring the liquid into hot water, or spraying into a hot chamber or making a film or extruding a filament and evaporating the liquid. Specification 395,291 is referred to.
Patent GB-792350-A (GB)
Title: Improvements in or relating to single-sideband radio receivers
IPC: H04B1/68
Filed: 1955-10-21
Abstract: 792,350. Radio receiving circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 21, 1955 [Oct. 25, 1954], No. 30156/55. Class 40 (5). A limiter precedes the demodulator in a single-sideband radio receiver to increase the signal-to-noise ratio. In one embodiment the limiter 16 is included between the frequency changer 14 and the homodyne demodulator 23. In order still further to increase the signal-tonoise ratio, the I.F. wave is also fed to a path including a crystal filter 17, passing preferably those frequencies that correspond to speech components of 500 to 800 c./s., an amplitude detector 18 and a low-pass filter 19 having a cut-off frequency of 300 c./s. or less. The output of this path is fed to an amplitude modulator 20 interposed between the filter 16 and the demodulator 23. A simple single-sideband filter 27 may follow the limiter 16. A suitablymodulated pilot frequency may be transmitted in known manner from which a signal may be derived to correct the dynamic range of the output speech signal. In another embodiment, the elements 17 ... 20 are omitted, Fig. 1 (not shown).
Patent GB-154073-A (GB)
Title: A new or improved jig or appliance for use in the attachment of cylinder and the like locks and latches
IPC: B23B47/28
Filed: 1919-12-03
Abstract: 154,073. Cope, B. H. Dec. 3, 1919. Drilling.-A jig or guide for locating the correct position of the hole cut in a door to receive the barrel of a cylinder lock, comprises clamping- jaws 3, 3<a> perforated, as shown at 4, to receive boring or marking tools, and having a screwed member 6 with bevelled edge 8, to act as a clamping-member and as a guide for the tool. The member 6 may be provided with a suitable bush for the latter purpose. A guide-plate 2 is provided to engage the edge of the door, and is preferably adjustable according to a scale marked on one of the jaws. Further small holes may be formed in one of the jaws to indicate the position of the screws for fixing the securing-plate to the door.
Patent GB-691804-A (GB)
Title: Improvements in and relating to single-bearing flange-mounting electric generators and motors
Inventor: JAGO LESLIE CLIFFORD
IPC: H02K7/00
Filed: 1950-12-11
Abstract: 691,804. Mounting dynamo-electric machines. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Dec. 3, 1951 [Dec. 11, 1950], No. 30183/50. Class 35. A dynamo-electric machine of the singlebearing type has a disc 7 on the rotor shaft 4 adapted to be fixed alternatively to the stator frame 5 or a flywheel 2. The disc 7 is bolted to a coupling flange 4a to which a stub 11 is fixed which enables the rotor to be centred within the stator by engaging a counterbore 12 in the flywheel 2. The disc 7 is shown bolted to the fly-wheel as it would be when the unit is assembled in running condition, the disc being clear of the stator frame 5. When the dynamoelectric machine is to be removed from the engine, the bolts 10 are withdrawn and bolts are inserted in the holes 9. The shaft 1 may be connected to a prime-mover, e.g. internalcombustion engine, or to a compressor, pump or the like.
Patent GB-1535076-A (GB)
Title: Dc motor control arrangements
IPC: H02P29/20
Filed: 1976-07-20
Abstract: 1535076 Automatic control of speed SONY CORP 20 July 1976 [24 July 1975] 30195/76 Heading G3R [Also in Division H2] In a speed control system for a D.C. motor in which a drive circuit controls the motor speed according to a speed error derived from a pulse train of a frequency related to motor speed, a start circuit is provided which supplies a drive start signal to the drive circuit from a monostable multi-vibrator and with a time constant determined by a present frequency when the pulse train is below the pre-set frequency. As shown, the pulse train Sc from a motor driven tachometer 2 is fed via time delay circuits 4A, 4B to a trapezoidal waveform generator 5, the waveform being started by each time delayed pulse from train SF. The trailing edge of each of these pulses also initiates pulses Sp from generator 8, the trapezoidal waveform being sampled when a pulse Sp is produced. The sampled value is held at 7 and used to control a D.C. drive amplifier for motor 1 so as to regulate its speed. The circuits 4A, 4B function as monostable multi-vibrators unless the motor speed train SF is greater than a predetermined frequency, when they act as inverters. For use in a video recorder utilizing a rotary head, the delay of 4B may be changed according to any phase error between the head and a reference, applied to input 10. When the frequency of the train SF is lower than a pre-set value, a starting control circuit 11 supples a start signal Ss to hold circuit 7 or sample circuit 6. The motor is then controlled by the start signal (whose duration decreases as the motor speed increases) and the speed regulating circuit inhibited until the pre-set speed (determind by a time constant set in circuit 11) is reached. To start the motor before a motor speed signal SF is generated, the motor is driven by a constant voltage from waveform generator 5. Details of the time delay circuit and starting circuit are given in Figs. 3 and 5 respectively (not shown).
Patent GB-772142-A (GB)
Title: Improvements in partitions
Inventor: BEARDSWORTH GEORGE
IPC: E04B2/78
Filed: 1954-10-21
Abstract: 772,142. Partitions. ROWE BROS., & CO., Ltd. Oct. 20, 1955 [Oct. 21, 1954], No. 30298/54. Class 20(4) A partition wall in which panels are supported between vertical uprights, has each panel between any two uprights secured in position by spring pressure to enable the panel to be moved against the spring pressure for removal of the panel without disturbing the uprights. I-section uprights B<SP>1</SP> are provided with a spring or springs b bolted to one side of the web bl of the upright and with a stop or stops b<SP>2</SP> bolted to the opposite side, the panels A being inserted between the flanges b<SP>3</SP> and the springs b compressed by one vertical edge, the other vertical edge then engaging the stops b<SP>2</SP> between the flanges b<SP>3</SP> of the next upright. The panels A are preferably of box section formed in two halves separated by rubber buffers a<SP>1</SP> to maintain the panels in contact with the flanges b<SP>3</SP>. The panels A may have sides of greater thickness than the centre to provide pillars A<SP>1</SP> at each upright. The panels A support hardwood, glass or metal sheets a to form the upper half of the partition. These panels and end, sections a<SP>2</SP> may be provided with spring ends a<SP>3</SP> to slide in the flanges b<SP>3</SP>, the end sections a<SP>2</SP> being screwed to a wall C' or the like: The pillar A' may be in the form of a frame to carry a door C mounted on hinges c, the frame or pillar A<SP>1</SP> being welded or otherwise secured to a panel A. The panels may be of sheet'metal or of plaster board and may be filled with glass wool or the like to provide sound insulation.
Patent GB-863078-A (GB)
Title: Improvements in moulding machines
Inventor: WEAVERS ALAN ALBERT
IPC: B22C15/10
Filed: 1958-09-23
Abstract: 863,078. Moulding-machines. PNEULEC Ltd. Dec. 23, 1959 [Sept. 23, 1958], No. 30304/58. Class 83 (1). A moulding-machine of the kind in which a mould-carrying table 14 is vertically movable relative to the body of the machine by compressed air admitted below the table, and an impact is applied to the table by a vertically movable jolt piston 10 while the table is in a state of suspension, is characterized in that the jolt piston works in a cylinder 11 in which it is supported by air under pressure, the admission of compressed air between the upper end of the piston 10 and the table lifting the table and depressing the piston against the resistance of the air in the lower end of the cylinder 11 below the piston. Air is admitted to the space 27 between the table and the piston 10 through a normally closed valve 28, which is opened by engagement of the table and the piston 10, the piston being raised into this position by air whose pressure is adjusted according to the weight on the table. Admission of pressure air through the valve 28 moves the table upwardly and the piston downwardly until it clears the sleeve 35, whereupon the pressure air flows to exhaust through ports 36, the table falls and the piston moves upwardly to give a jolting impact, the valve 28 is reopened by the jolt piston, and the cycle is repeated. The squeeze piston 12 is moved upwardly by pressure air admitted at 25 carrying the table with it after engaging the depending sleeve 13. The space beneath the jolt piston is therefore reduced, and the pressure in it is increased, and is compensated by increasing the pressure above the jolt piston to continue jolting during squeezing. There may therefore be two separate air feeds to the space 27 between the jolt piston and the table, one feed being through a restricted orifice and used during jolting only, the other being unrestricted and used during the squeeze.
Patent GB-917090-A (GB)
Title: Improvements in or relating to delayed tack coatings
IPC: C08K5/18
Filed: 1961-08-22
Abstract: The reaction product of an amine and carbon dioxide (i.e. an amine carbonate) is used as a latent plasticizer for thermoplastic resins. Amines specified are dehydroabietylamine, butylamine, octylamine, benzylamine, a -methylbenzylamine, diphenylamine, o-methoxyphenethylamine, and 2-amino-2-ethyl-1,3-propanediol. The resin may be any natural or synthetic rubber, polystyrene, polyvinyl acetate, polyvinyl chloride, vinyl acetate-vinyl chloride copolymers, polyvinylidene chloride, non-drying alkyd and phenolic resins and cellulose acetate.  The whole solids are dispersed in a liquid medium which may be water or an organic solvent in which the polymer dissolves but not the amine-carbonate.  Liquids specified include hexane, heptane, octane, toluene, ethyl ether, methyl ethyl ketone, and ethyl alcohol (used with cellulose acetate).  The emulsion or solution may be applied to any backing and the plasticizer activated by heat.ALSO:Amines may be reacted with carbon dioxide to form amine carbonates.  Amines specified are dehydroabietylamine, butylamine, octylamine, benzylamine, a -methylbenzylamine, diphenylamine, o-methoxyphenethylamine and 2-amino-2-ethyl-1,3-propanediol.  The carbon dioxide may be bubbled through a solution of the amine in an organic solvent or water.  The source of carbon dioxide may be "dry ice" or powdered ammonium carbonate.  The products are insoluble solids which may be filtered, washed and air dried.
Patent GB-1092700-A (GB)
Title: Arrangement for the stepless adjustment of the output of a piston compressor
IPC: F04B49/24
Filed: 1965-07-16
Abstract: 1, 092, 700. Regulating compressors. MASCHINENFABRIK BURCKHARDT A. G. July 16, 1965 [July 17, 1964], No. 30348/65. Heading F1N. An arrangement for varying the output of a compressor having a piston 16 reciprocable in a cylinder 15, comprises a fixed volume auxiliary chamber 1 communicating with the cylinder through an adjustable throttle device 2 and a check valve 3 whereby a fraction of the gas compressed in the cylinder flows through the throttle device 2 into the auxiliary chamber to return to the cylinder 15 during the suction stroke of the piston substantially unrestricted through the check valve 3 and also through the throttle device 2. Gas is supplied and discharged from the cylinder through separate inlet and delivery valves. The throttle device may be in the form of a needle valve, cylindrical slide valve or a check valve having a limited lift and may be coaxial with the check valve 3. In Figs. 4 and 5 (not shown) the auxiliary chamber is defined by a space formed between the cylinder and the end of the valved suction pipe. The auxiliary chamber may be water cooled.
Patent GB-399029-A (GB)
Title: Improved means for rendering hand signals visible
IPC: B60Q1/34
Filed: 1932-10-29
Abstract: 399,029. Traffic signals. WRIGHT, W. B., 51, Goulden Road, Withington, Manchester. Oct. 29, 1932, Nos. 30431/32' and 4111/33. [Class 118 (ii).] A device for rendering visible hand-signals given, for example, by policemen, cyclists, pedestrians, or motorists is strapped to the hand or wrist and includes one or more batteries a, b, an electric lamp bulb c and a switch which is adapted to be closed by the expansion of the muscles in extending the hand to give the signal. The switch comprises a metal strip d which also serves as a cover for the device and is electrically connected to the lamp socket, and a second conductor strip e spaced from the strip d by insulation f and an air gap g. The air gap is closed as the muscles expand and the light from the lamp is directed on to the signalling hand.
Patent GB-752538-A (GB)
Title: Improvements relating to subsoilers
IPC: A01B13/08
Filed: 1954-10-22
Abstract: 752,538. Subsoilers. MASSEY-HARRISFERGUSON, Inc. Oct. 22, 1954 [Oct. 28, 1953], No. 30434/54. Class 6 (1). A subsoiler is attached to a tractor by means of laterally spaced draft links and an upper hitch mechanism, and comprises a cutter beam mounted at its centre in right-angled relation to a drawbar, the cutter beam comprising similar devices at its upper and lower ends for attachment to either the hitch mechanism of the tractor or a share plate respectively, intermediate means for attachment to the draft links, and soil-cutting front edges extending between the intermediate means of connection and the upper and lower devices, the knife edges being interchangeable by reversing the beam end for end. The cutter beam 10 has sharpened leading portions 14, 15 and is mounted on a draw bar 11 by means of vertically-spaced brackets 35, the drawbar being pivotally connected to draft links 12 which may be lifted by hydraulic means. The beam carries similar devices 46 and 47 at its upper and lower ends, each adapted to carry either the share plate assembly 16 or the trailing end of a telescopic controlling link 18 which completes the connection of the cutter beam to the tractor and, acting in conjunction with the hydraulic unit of the tractor, effects automatic depth control of the beam. Further, the link 18 limits the extent to which the beam, on being raised for transport, locks in a clockwise direction. A leading coulter blade 72 may be secured to the middle of the beam 10 in order to clear the path of the lower knife-edged portion of the beam.
Patent GB-159959-A (GB)
Title: Improvements in electromagnetic wave signalling apparatus
IPC: H04B1/16
Filed: 1919-12-05
Abstract: 159,959. Robinson, J., and Crowther, H. L. Dec. 5, 1919. Thermionic detectors; audible reception of unmodulated continuous waves.-In a receiving system for continuous waves, a valve 6 oscillating at an audible frequency affects the grid potential of a receiving-valve 10 in such a way that the positive peaks of the low-frequency oscillations just bring the valve 10 to the condition represented by the lower bend of its grid potentialanode current curve. The valve 10 thus only passes current due to the received continuous waves at intervals depending on the frequency to which the low frequency valve is tuned. 'In a modification, the receiving valve 10 has a fixed saturation point, and this point is used instead of the lower bend of the characteristic.
Patent GB-451396-A (GB)
Title: Improvements in or relating to tools for clinching tubular rivets
IPC: B21J15/04
Filed: 1935-11-04
Abstract: 451,396. Setting tubular rivets. BRISTOL AEROPLANE CO., Ltd., and FRISE, L. G., Filton House, Bristol. Nov. 4, 1935, No. 30493. [Class 43] A hand tool for clinching tubular rivets comprises a body 10 having a yielding abutment 30 which is movable, by pressure against the rivet head, to allow an expansion rod 20 and a circle of spring-biassed or resilient operating rods 22 to pass through the rivet bore, subsequent retraction of the rod 20, by means of a trigger 17 and a slide 12, causing a cam portion 21 thereof to force the operating rods outwardly and expand the shank 32 of the rivet. The abutment 30 forms part of a sleeve 27 that is slidable, to an extent determined by adjustable nuts 31 and a flange 29, on a sleeve 24 which, with the free ends 23 of the operating rods, is clamped to the body 10. The inward movement of the rod 20 and block 12 is limited by an adjustable screw 19. In a modification the block 12 is connected with lost motion to an assembly comprising the sleeve 24, a clamping plate and the rods 22 thereby enabling the expanded rods to be pulled partly through the bore of the rivet.
Patent GB-1018696-A (GB)
Title: Improvements relating to plaquettes
IPC: B60R13/00
Filed: 1964-08-04
Abstract: 1,018,696. Plaquetts. WILHELM ROPKE, and A. HUECK. Aug. 4, 1964 [July 20, 1963], No. 30533/64. Heading B8F. A plaquett 1 of synthetic plastics material, preferably transparent, has a reflecting layer 2 and is preferably concave on its rear face to which a layer 4 of foamed plastics material such as cold-foamed polyurethane is bonded. Fixing means, such as a member 6 and threaded studs, is at least partly embedded in the layer 4. The edge of the plaquett is preferably enveloped by the material 4 forming a seal 8 at its rear. Alternative fixing means such as threaded sleeves may be used.