baber/WOPTO huggingface dataset:
Patent GB-1140684-A (GB)
Title: Switching circuits
Inventor: WALSH PETER ALFRED
IPC: H03K3/26
Filed: 1965-08-31
Abstract: 1,140,684. Transistor switching circuits. ROTAX Ltd. 29 July, 1966 [31 Aug., 1965], No. 37163/65. Heading H3T. A capacitor 3 charges from a supply at a rate dependent on the magnitude of a control signal until the potential across it is sufficient to operate a switching device 6 and develop an output across a resistor 7. The capacitor 3 is periodically discharged by means of a switching device 8 to interrupt current flow through resistor 7. The rate of charge of capacitor 3 is determined by the magnitude of the control signal at the base of transistor 1, which thus determines the time at which the potential across capacitor 3 renders transistor 5 conducting and breaks down Zener diode 6. When this occurs, positive feedback between transistors 1, 5 causes transistor 5 to saturate rapidly and produce an output across resistor 7. When transistor 8 is switched on by a pulse at its base capacitor 3 is discharged and the circuit switches to its other state for a time dependent on the amplitude of the signal at 10. If a train pulses is applied at 9, the output across resistor 7 comprises a train of pulses, the pulse width and hence the mean output voltage being dependent on the amplitude of the signal applied at 10.
Patent GB-1345493-A (GB)
Title: Track and hold buffer amplifier
IPC: H03K7/02
Filed: 1972-08-09
Abstract: 1345493 Transistor amplifying and gating Circuits SINGER CO 9 Aug 1972 [8 Nov 1971] 37187/72 Heading H3T In a track and hold circuit an analogue input signal is applied to the base of transistor Q1 which with transistor Q2 forms a differential amplifier of the long-tailed pair type. Transistor Q2 is in cascade connection with a further transistor Q3 whose collector is direct coupled to the gate of a field-effect transistor Q4 forming a source-follower, its source being coupled to the output terminal 10 and also to the base of transistor Q2, so there is unity voltage gain overall. Application of a "hold" command signal to the arrangement causes reversal of the differential amplifiers comprising transistors Q12, Q13; Q14, Q15 and Q16, Q17 whereby transistors Q3, Q5 and Q10 respectively are biased to cut-off. The charge on capacity C h , which comprises the gate to ground capacity of FET Q4 in parallel with the output capacity of transistor Q3 is then held at a value corresponding to the last value of the analogue input signal, so that the output potential at terminal 10 is correspondingly held constant.
Patent GB-864961-A (GB)
Title: Improvements relating to dust bins and other like containers
Inventor: SHAW THOMAS HINGLEY
IPC: B65D25/24
Filed: 1958-11-22
Abstract: 864,961. Dust bins. BOWER LANE MANUFACTURING CO. Ltd. Nov. 20, 1959 [Nov. 22, 1958], No. 37647/58. Divided out of 795,408. Class 26. In an improvement in or modification of the invention of Specification 795,408 a dust bin has a wall a and duplex bottom structure formed of plates b, c attached thereto, the plate c having an integral rim c<SP>2</SP> resting on the ground. The plate b is corrugated and has, an upward peripheral flange b<SP>1</SP>, with a downward part b<SP>2</SP> to enter an upward flange a<SP>1</SP> on the bin a, and over it, a cup-shaped member c, c<SP>1</SP> preferably of higher gauge metal, is slid before a rolling pressing, beading or like operation for bending it around the lapped joint b<SP>1</SP>, a<SP>1</SP>, b<SP>2</SP>. The bottom c may be spaced from bottom b.
Patent GB-1484697-A (GB)
Title: Electrical switch
IPC: H01H37/48
Filed: 1974-08-29
Abstract: 1484697 Thermal switches E G O ELEKTRO-GERATE BLANC u FISCHER 29 Aug 1974 [30 Aug 1973 10 May 1974] 37702/74 Heading H1N In a snap-action switch actuated by a thermally expanding rod and tube 23, 37, Fig. 1, or similar actuator having only a small travel, the snap-action spring 18 comprises resilient flat material carrying at least one contact 19, 20 at each end and having two spring tongues 24, 25 directed towards one another and engaged under stress in opposed support bearings 27, 28. The contacts 19, 20 may be the sole connections to the spring 18 or connections may also be made through the bearing supports 27, 28 or by terminals on the spring 18. The web 21 of the spring may be engaged directly by the actuating rod 23 at a central rib 22 where the spring 18 is initially stressed downwardly towards the rod 23. Temperature setting adjustment may be provided by screws (44) Fig. 3 (not shown) inserted through the base 34 and engaging brackets 32, 33 to vertically adjust the position of the support bearings 27, 28. In a modification where the spring 18 is initially stressed upwardly the spring 21 is engaged by a T-shaped member 41, Fig. 4, extending through a central slot 40 and urged downwardly towards the actuator by a leaf spring 42 engaged in a slot 43. A rod and tube thermal unit is described which is mounted horizontally beneath a hot plate unit comprising spiral heating elements and backed by a sheet of insulating material. An arrangement is also described in which the switch is used as a thermal relay and has a heater coil surrounding the thermal element.
Patent GB-1314985-A (GB)
Title: High current gate controlled switch
IPC: H01L29/744
Filed: 1970-08-06
Abstract: 1314985 Semi-conductor devices WESTINGHOUSE ELECTRIC CORP 6 Aug 1970 [27 Aug 1969] 37932/70 Heading H1K A high current, gate controlled, semiconductor switch comprises four layers of alternate conductivity type, the cathode region being in the form of a plurality of separated regions 12, with only a part of each region 12 being contacted by an electrode 16, the uncontacted part of each region forming an integral resistance to effect uniform current distribution during turn off. The electrode 16 preferably covers only two thirds of the area of each region, the uncontacted part of each region being furthest from the centre of the device. The device may have a mesa structure, as shown, or the regions 12 may lie in the gate region 14 adjacent the wafer surface. The gate electrode 20 may have a separation area 24 between it and the cathode electrode 16. A groove 40 may be present in each region to reduce the crosssectional area of the region through which the last of the current, during turn off, must pass. The structure may be formed from silicon by gallium and phosphorus diffusion, use of photoresist and etching techniques, and the formation of electrodes of aluminium, gold, silver or molybdenum using, in one instance, a boronaluminium solder. The use of an integral resistance portion in each cathode region is said to cause the last of the main current to distribute itself equally between all the cathode regions 12, following the turn off signal, so that all the regions turn off simultaneously. The device is said to handle 70 amps with a turn off time of two microseconds.
Patent GB-1442248-A (GB)
Title: Drive mechanism for rotary printing machines
IPC: F16H37/08
Filed: 1974-08-30
Abstract: 1442248 Variable speed gear ALBERT FRANKENTHAL AG 30 Aug 1974 [28 Sept 1973] 37967/74 Heading F2D Very fine differential speeds are superimposed on the prevailing speed of a printing roller 1, to compensate for variations in web tension, by a harmonic planetary gear comprising an elastically deformable sleeve 12, secured at one end to the roller 1 and having at its other end external teeth, meshing internal teeth 11 in a wheel 9, secured to a freely mounted wheel 3 driven by a main wheel 2, the differential rotation being imposed by driving an elliptical stator 14, bearing in the deformable sleeve 12, and driven by the gear-wheel 3 through a wheel 18 and steplessly variable-ratio gear 15. When no differential is to be imposed, the stator 14 is rotated at the same speed as that of the roller, and speed variation is produced by varying the speed of the stator to produce harmonic elliptical deformation of the sleeve 12, causing it to planetate in the ring 9.
Patent GB-333849-A (GB)
Title: Combined kerb and clothes horse or fire guard
IPC: A47G5/04
Filed: 1929-12-11
Abstract: 333,849. Smith, N. J. Dec. 11, 1929. Garment racks.-A combined curb and clothes airer or fireguard comprises a hollow front member within which two uprights d are permanently hinged so that when turned down they are covered by the lid b, the raised position being maintained by loose rails f engaging brackets on the uprights and adapted to be stowed in the curb when out of use.
Patent GB-333850-A (GB)
Title: Improvements in apparatus for straining liquids
IPC: B01D29/05
Filed: 1929-12-11
Abstract: 333,850. Bailey, F., and Jackson, F. H. Jan. 5, 1929, [Convention date]. Strainers comprising grids or gratings. - Relates to straining apparatus of the type described in Specifications 246,581 and 307,984, and comprising a circular straining. surface held stationary in a chamber, the sectors of the surface being cleansed successively by a reverse flow of liquid carried away through a sector-shaped cleanser-box which rotates over the straining surface. With the form of apparatus shown in Fig. 1, straining takes place under pressure from right to left through the surface b and a portion of the liquid strained passes backward into the cleanser box e thus cleansing the portion of the surface b covered thereby. The flush liquid is discharged axially under control of a valve opened by a rod h<1>, which passes centrally through the main shaft and is opened by cam mechanism, and closed by a spring h<2>, The apparatus shown in Fig. 2 is operated under suction, the flush liquid passing through a flush box d which rotates opposite to the cleanser-box e. The flush liquid enters through a port l which comes successive over each of a series of ports f in a chamber j. The discharge of the flush liquid takes place through a non-return valve m. Contact between the faces of the straining face a, the cleanser-box e and the flush-box d are secured by means of a screw o<1> which bears against the end of a push rod o extending through the central shaft and engaging a cotter n<1> which is fixed in the hub of the box d and extends through a slot in the shaft.
Patent GB-899740-A (GB)
Title: Endless chain device for the transport of parts in a machine
IPC: B23Q7/03
Filed: 1960-11-07
Abstract: 899,740. Chains. ANDREAE, E. C. Nov. 7, 1960 [Nov. 10, 1959], No. 38219/60. Class 24. [Also in Group XXX] An endless chain conveyer (see Group XXX) comprises a chain composed of links 3, 4 interconnected by pins 6 and ball bearings 7, inclination of the pins 6 with respect to the axes of the bearings 7 being prevented by a series of balls 8 interposed between upper and lower annular tracks formed respectively on the links 3, 4. Lock-nuts 11, 12 maintain the annular tracks at the desired spacing after insertion of the balls 8. A plate 28 carrying article supports 29 is attached to each link 3 by bolts. Rollers 5 are carried by the links for guiding purposes, those carried by the links 4 being adjustable in height by the provision of slots for their axles 31 and adjustable screw abutments 30.
Patent GB-1035765-A (GB)
Title: Ticketing machine and method and ticket therefor
IPC: B65C9/46
Filed: 1962-10-09
Abstract: 1,035,765. Feeding webs. SOABER CO. Oct. 9, 1962 [Oct. 13, 1961], No. 38240/62. Heading B6B. [Also in Division D1] A ticket tape is fed by ticket-length increments towards a shearing blade which severs said lengths in succession, and the resulting tickets are successively secured by sewing to soft goods articles. A roll 91 of ticket tape 103 is supported by rollers 92, 93 which are journalled on fixed pins 94, 95 and which are in three sections for adjustably receiving a supporting plate 102 for roll 91 in accordance with the width of the ticket tape. The tape passes over a tensioning leaf spring 108 and through adjustable guides 8, 9 on a bed 7, and is pressed against the latter by a spring-biased finger 111 to prevent retraction of the tape. A member 764 is raisec while the tape is being fed by pawls 132, and falls when the tape is stationary to draw slack tape from the roll 91. The pawls 132, which engage feed slots 121, Fig. 3 (not shown), in the ticket tape, are pivoted on a pin 180 on one arm of a bell crank lever 135 pivoted at 143 to a carriage 131 slidably keyed to a driving shaft 13 which performs one revolution for each cycle comprising a ticket-cutting and a ticket-attaching operation. The other arm of lever 135 carries a follower roller 163 co-operating with a rotary cam 134 slidable on shaft 13 with carriage 131, whereby lever 135 has a fixed angle of oscillation. For feeding tickets of varying lengths, the axial position of carriage 131 on shaft 13 is varied by rotating a shaft 148, having screw-threaded connection with carriage 131, by means of a knob 156. The constant feeding stroke of pawls 132 is slightly greater than the length of the longest ticket, viz. 2 inches. For feeding 1-inch tickets, a bush 188, pivoted on pin 180 and carrying a pin 190, is turned clockwise to engage the latter with the front end of a flat 192 formed in the hub portion 177 journalling pin 180, whereby the pawls 132 are held from engagement with tape 103 during the first half of the feeding stroke by means of the pin 190. For ticket lengths greater than 1 inch, bush 188 is turned counterclockwise to remove pin 190 from engagement with pawls 132. The position of carriage 131 is so adjustable that the pawls 132 in their forward position are at a distance from the cutting blade equal to the ticket length less the distance of the front of the feed slots 121 from the rear edge of the ticket. Since the pawls 132 can operate to within 1¥ inch of the blade, the position of the carriage for 2 and 1¥-inch tickets is in the front part of its adjustment, while for 1“ and 1¢-inch tickets the carriage is adjustable to the rear part of its travel, the pawls then coming to within two ticket lengths of the blade. A pointer on the carriage co-operates with a fixed scale calibrated in ticket lengths.
Patent GB-914231-A (GB)
Title: Improvements in or relating to sampling apparatus for obtaining graphite specimens from nuclear reactors
Inventor: CASHEN WILLIAM STEPHEN
IPC: G01N1/04
Filed: 1959-11-11
Abstract: 914,231. Handling radio-active material. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Oct. 26, 1960 [Nov. 11, 1959], No. 38337/59. Class 39 (4). [Also in Group XXII] Apparatus for taking a graphite sample from the wall of a channel in the core of a reactor, comprises an elongate body 68, a bladed trepanning head 30 movable out from the surface of the body, a cutter 34 for parting-off a sample within the trepanning head, and means 85 for feeding coolant to the blades. Blades 33 are secured by screws 92 to the head 30 rotated within roller bearings 31 by an air motor 47 through gears 50, 49, 48. The motor also drives gears 51, 54 to rotate a scroll cam 42, which has a track 43 to advance the trepanning head and a track 41 to move a helical gear 37 axially and swing the cutter 34 to part-off the sample. The gear 54 contains a ball-clutch to allow slipping if the trepanning head becomes jammed. If jamming occurs, or the motor 47 fails, the cam 42 can be rotated in the reverse direction by a pawl 60 reciprocated by a piston 57. To clamp the apparatus in an inclined position, a lever 69 can be projected from the fore part of the apparatus by a piston 71. The cooling air is supplied through a channel 84 which, at any one time during the advance of the head, is in communication with three of nine bore-holes 85 in the head. Swarf passes out through holes 87, 88, and may be led away through an extension duct (not shown). Completion of an operation is signalled when a contact 63 on the cam 42 engages a contact 64 and causes a light to be illuminated. To insert the apparatus into a hole, lengths of graduated tubing are attached to its rear end by screwed and pinned joints.
Patent GB-1018059-A (GB)
Title: Improvements in or relating to spray apparatus
IPC: B05B7/30
Filed: 1964-09-21
Abstract: 1,018,059. Spray-producers. WALL COLMONOY CORPORATION. Sept. 21, 1964 [Jan. 3, 1964], No. 38472/64. Heading B2F. In an apparatus for spraying a coating powder entrained in a stream of mixed gas and atomized binder liquid, powder fed to the stream is delayed by a "sensing" device in the gas path of the stream until the composition of the stream is such as will effect the desired coating with the particular powder employed. In the apparatus shown, the liquid is sucked from a container 12, Fig. 1, by an air stream entering a spray gun 10 through a pipe 30 whilst the powder drops from a container 42 and is entrained in an air stream passing along a path comprising pipes 38 and 44. The air used in the apparatus is conducted from a compressed source and passes to a junction 22 through a valve 16, filter 18 and adjustable pressure reducer 20. From the junction the air passes in two paths to the gun nozzle assembly the air for atomization of the liquid passing to an annular orifice 74 in the nozzle assembly through a part 26, Figs. 1 and 4, of the "sensing" device, the pipe 30, a gun handle tube 62, Fig. 2, a spring-loaded trigger actuated valve 52, a gun duct 68, an annular space 70 and parallel connected tubes 72. Actuation of the trigger 50 to open the valve 52 withdraws a needle valve 54 from an orifice 60 which is surrounded by the annular orifice 74 thus allowing the air issuing through the orifice 74 to aspirate the liquid in the container 12. The air stream which entrains the powder dropping from the container 42 issues into a base compartment 122, Fig. 5, through a nozzle 114 after passing from the junction 22 through an adjustable pressure reducer 34, a part 36, Fig. 4, of the "sensing" device and the pipe 38. This air flow is delayed after actuation of the gun trigger 50 until the "sensing" device opens a spring-loaded diaphragm controlled valve 104 in the device part 36. Such opening is only effected when the liquid atomizing air flow through the "sensing" part 26, Fig. 4, is such that pressure differential is brought into play upon both sides of the diaphragm 96 controlling the valve 104 to cause the diaphragm to move to the left and thus withdraw the valve 104 from its seating 108. The entrained powder is fed from the container 42, Fig. 5, through a tube 116 and pipe 44 to an orifice 48 forming part of the gun nozzle assembly and located such that the powder is discharged into the issuing air and atomized liquid mixture. The gun nozzle assembly also includes side orifices 76, Fig. 3, for shaping the air and liquid spray. The top of the container 42 is in communication with the pipe 44 through a connection 124, Fig. 5. Articles coated by the apparatus are subsequently heated to volatilize the liquid binder.
Patent GB-337664-A (GB)
Title: Improvements in landing carriages for watercraft
IPC: B64F1/22
Filed: 1929-12-17
Abstract: 337,664. Maschinenfabrik. Augsburg- Niirnberg Akt.-Ges, Dec. 17, 1928, [Convention date]. Traversers and turntables, electrical.-Landing carriages for watercraft, more particularly for large seaplanes, are provided with an electric motor 5 which through suitable gearing drives and also raises and lowers wheels 2, 3 running on rails arranged in transverse directions. The motor 6, which is controlled from land the electric connection being established through a towing hawser, is enclosed in a watertight casing 6. The casing is further provided with a supply of compressed air which is released to prevent water from penetrating through a leaky joint. The carriage may be provided with a turntable 49 operated by a second similarly controlled motor 52.
Patent GB-1148534-A (GB)
Title: Digital transducer
Inventor: MEYER JOHN FRANCIS ANTHONY
IPC: G01R17/00
Filed: 1966-08-30
Abstract: 1,148,534. Selective signalling. J. F. A. MEYER. 29 Aug., 1967 [30 Aug., 1966], No. 38687/66. Heading G4H. In a digital pressure transducer the unknown pressure is applied to the under side of a diaphragm 4, Fig. 1 (Prov.), and is balanced by the vapour pressure of an electrolyte in a sealed container 1 above the diaphragm, the vapour pressure being controlled by a heating element 9, the current through which is determined by the number of electrodes of a set of electrodes 8 that are immersed in the electrolyte. The air surrounding the container 1 is kept at a constant temperature by known means including a thermistor 15 and a heater 14. In a second embodiment (Fig. 5, Prov., not shown) the electrodes are binarily related. Transistor heater control circuits (Fig. 2, not shown) are described into which a non-linear characteristic may be incorporated.
Patent GB-375762-A (GB)
Title: Improvements in methods of and apparatus for gathering molten glass in moulds
IPC: B24B19/16
Filed: 1930-12-23
Abstract: 375,762. Glass manufacture. LYNCH CORPORATION, Central Indiana Railroad, Anderson, Indiana, U.S.A.-(Assignees of Bridges, E. G. ; c/o Lynch Corporation, Anderson, Indiana, U.S.A.) Dec. 23, 1930, No. 38714. Convention date, Dec. 26, 1929. Void [Published under Sect. 91 of the Acts]. Addition to 365,245. [Class 56.] Delivering molten metal.-A device for supplying molten glass to a suction-gathering machine comprises a receptacle from which the glass is gathered, and means for tilting the receptacle periodically in order to circulate the glass therein and to raise its surface to a level at which it covers the lower end of a mould in the gathering-position. The molten glass flows continuously from a tank furnace 10, Fig. 1, into a receptacle or pot 12 which is pivoted at its rear on a shaft 21 and is provided at its front end with a roller 25 that rests on a rotating cam 27. The weight of the pot is counterbalanced by a weight 23, or a spring 23a may be used. The body of the pot is divided longitudinally by a partition 16, Fig. 2, into separate passages 17, 18 connected by a cross passage 19 at the rear, and the front portion 20 of the partition is made slightly lower to permit lateral movement of the glass. The passage 18 is divided up by a number of transverse partitions or dams 30 to ensure that the flow of the glass is from front to rear. A hood 31 containing burners 32 covers the greater part of the pot and maintains the temperature of the glass. The device is particularly intended for use with the machine described in the parent Specification in which the parison moulds move intermittently and are not dipped when making a gather. The front end of the pot is lowered by the cam 27 when a parison mould 33 is moving to or from the gathering position, and is then raised to bring the glass into contact with the lower end of the mould. As the mould moves away from the gathering position, the drag of the chilled thread of glass trailing from the mould causes the glass in the pot to move from the passage 17 to the passage 18, and this movement assists the circulation caused by the tilting of the pot. The chilled thread is cut off from the mould by a shear blade 44 and is carried along the passage 18 and remelted, the partitions 30 ensuring that the chilled glass moves only towards the cross passage 19.
Patent GB-1271343-A (GB)
Title: Means for restoring a threaded hole in an engine block
Inventor: MAGGI ROBERT
IPC: F16B33/00
Filed: 1970-08-11
Abstract: 1,271,343. Taps; reamers. BESENBRUCH HOFMANN Inc. 11 Aug., 1970 [11 Aug., 1969], No. 38725/70. Headings B3C and B3N. For restoring an imperfect threaded hole, e.g. in an engine block, a tap 50 is screwed into the hole H to ream it out and then tap it. After this a sleeve 10 is screwed on to a spark plug 16 and the assembly screwed into the enlarged hole. The tap comprises three sections, viz. 53, 54 and 55. Section 53 has hollow ground edges 66 and in use starts to ream out the hole. Section 54 has hollow ground cutting edges 69<SP>1</SP> and acts to finish reaming of the hole and to form a helical groove therein. This groove is a guide for section 55 which has hollow ground cutting edges 73. In use the section forms a discontinuous thread in the hole. The sleeve is preferably formed of a lead-steel alloy so that when tightened in the hole the metal of its external thread will flow and seal in a gas-tight joint with the thread of the hole.