baber/WOPTO huggingface dataset:
Patent GB-1116983-A (GB)
Title: Process for producing vinyl chloride
IPC: C07C17/08
Filed: 1965-08-06
Abstract: Vinyl chloride is produced from a cracked gas containing acetylene, by thermally cracking hydrocarbons, having at least 2 carbon atoms, by contact with a combustion gas at a temperature at the completion of the cracking of at least 1,200 DEG  C., washing the cracked gas at atmospheric pressure with water and kerosene to remove carbon and tar, removing higher acetylenes from the cracked gas by absorption under superatmospheric pressure into kerosene containing no fraction having an initial boiling point less than 150 DEG  C., drying the cracked gas and mixing it with at least an equimolar amount of dry hydrogen chloride gas, based on acetylene, passing the gas mixture at 100-180 DEG  C. under 3-20 atmospheres over a mercuric-chloride/ active carbon catalyst to convert the acetylene to vinyl chloride, removing remaining hydrogen chloride by washing with water, absorbing the resultant vinyl chloride in kerosene containing no fraction boiling at less than 110 DEG  C., and separating the vinyl chloride by boiling the kerosene into which it has been adsorbed. Preferred hydrocarbons are petroleum gas and petroleum naphtha.  The spent hydrochlorination catalyst can be regenerated by treatment in situ with chlorine or hydrogen chloride. The waste gas remaining after vinyl chloride has been removed from the reaction gas can be used to strip any acetylene from the kerosene in which the higher acetylenes are absorbed and the resulting gas, which may contain entrained kerosene, used as a fuel gas for the combustion stage.  The process is illustrated by reference to drawings (not shown).
Patent GB-1274922-A (GB)
Title: Improvements in or relating to conveyor belts
IPC: B65G15/08
Filed: 1969-07-04
Abstract: 1,274,922. Conveyer belt. PNEUMATIQUES CAOUTCHOUC MANUFACTURE ET PLASTIQUES KLEBER-COLOMBES. 4 July 1969 [8 July, 1968], No. 33950/69. Heading B5N. [Also in Division B8] An endless conveyer (see Division B8) is reinforced by longitudinally extending wires 3 arranged symmetrically over a width l of between 1/ 4  and <SP>2</SP>/3 the width of the belt L and two layers of transverse wires 6, 7, mutually inclined to the longitudinal axis of the belt and extending over substantially the width of the belt. The wires 3 are embedded in a projection (8), Fig. 2 (not shown), on the inner face of the belt.
Patent GB-448092-A (GB)
Title: Improvements in and relating to wheel barrows
IPC: B62B1/18
Filed: 1935-12-07
Abstract: 448,092. Wheelbarrows. PALTHE, A. VAN W., 58, Dieweg, Uccle, Belgium. Dec. 7, 1935, No. 33988. [Class 108 (i)] In wheelbarrows of the kind in which the wheel axle is adjustable longitudinally below the body, a body 1 is combined with one or several pushing devices between the shafts and at the level of the breast of the operator and with a wheel axle which is adjustable below and along the body. As shown the wheelbarrow having a breast plate 7 to aid propulsion is provided with a wheel 4 which is mounted on an arm 8 in such a manner that it may occupy either of the positions shown, abutments 10, 11 being provided.
Patent GB-1449482-A (GB)
Title: Feed control system
IPC: G01G11/00
Filed: 1973-07-17
Abstract: 1449482 Automatic control of conveyers HOBART ENG Ltd 17 July 1974 [17 July 1973] 34039/73 Heading G3R In an arrangement in which at least three serially placed conveyers feed a hopper, each conveyer after the first is continuously weighed and the resulting signal is used to regulate the feedrate of the preceding conveyer. In addition, the feedrate of all the conveyers is adjusted (in steps) if the time required to fill the hopper to a prescribed weight is greater or less than a desired time. As shown, each weigher 36 is connected to a vane which progressively obscures the light conducted from a single source 42 via a respective fibre optic 39 to a photo-cell in a unit 29 (also Fig. 3, (not shown)), the output of which controls the power to a vibrator 18 on the preceding conveyer. The overall feedrate is adjusted by altering the intensity of the source 42 by a motor driven dimmer, controlled by a relay circuit Fig. 5, (not shown). This circuit includes timers which set the running time of the dimmer motor to a value which will prevent overshoot. In an alternative Fig. 4, (not shown) the weigher comprises a movable core in a transformer, the input voltage to which is adjusted by the relay circuit. Variable speed belt conveyers may be used instead of the vibrating type shown. The relay circuit includes cam operated switches by which the feedrate may be restored to "normal" ( a pre-set value) e.g. after cleaning the conveyers.
Patent GB-1393687-A (GB)
Title: Recording carrier for signal storage and a method for recording  a signal on the recording carrier
IPC: H04N9/80
Filed: 1972-07-20
Abstract: 1393687 Recording and playback TED BILDPLATTEN AG AEG-TELEFUNKEN TELDEC 20 July 1972 [20 July 1971] 34086/72 Heading G5R Signals are recorded along a track on a record 1 in the form of compressible projections 14 having their tips at substantially the same level 28 and their bases at different levels. The frequency of the projections 14 when the track is scanned (by a pressure-sensitive pick-up as described in Specification 1,266,202) may correspond to a higher frequency signal, e.g. video luminance, on which is superimposed a lower frequency signal, e.g. chrominance, represented by the curve 30<SP>1</SP> followed by the bases of the projections.
Patent GB-628606-A (GB)
Title: Improvements in sound recording apparatus and method
IPC: G11B7/00
Filed: 1946-11-18
Abstract: 628,606. Sound-film recording. RADIO CORPORATION OF AMERICA. Nov. 18, 1946, Nos. 34118 and 34119. Convention dates, Nov. 17, 1945 and Dec. 22, 1945. [Class 40 (ii)] [Also in Group XL (b)] In an apparatus for recording sound on photographic film, positive and negative doublehump tracks are obtained by the use of a chevron-shaped beam of light which is reflected by a mirror 12 on a galvanometer 8, the resulting modulated beam being made to fall on a slit 26, such that the centre point of the chevron illuminates the centre of the slit when a negative record is required, and such that the upper edge of the chevron illuminates the ends of the slit when a positive record is required, an adjusting screw 32 being provided to effect the setting of the galvanometer position. The galvanometer is vibrated both in accordance with the instantaneous values of the sound waves and of those of the envelope of the sound waves, by known means, for the purpose of ground noise reduction, the amount and direction of the bias being the same for both positive and negative recording. The mask 16, which produces the chevronshaped beam, is also provided with slots 38, 39 by means of which indications are obtained on a monitor card 46 to show the extent of modulation and whether a positive or negative record is being made.
Patent GB-783235-A (GB)
Title: Improvements in and relating to rain protecting device, especially for hatchways on ships
IPC: B63B17/02
Filed: 1955-11-29
Abstract: 783,235. Hatch - &c. covers. SANDEN, J. O. Nov. 29, 1955, No. 34133/55. Class 20(1) [Also in Group XXXIII] A rain-protecting fabric cover 1 especially for a ships hatch is provided with a slot 4 to accommodate the rope depending from a cargo trimming crane, so that when the crane rope is swung sideways to press on one or other side of the slot it actuates a switch for an electric motor 9 to unroll the cover at one end and roll it up at the other end, so that the slot 4 moves with the sideways movement of the crane rope. The cover is in two separate parts both edged by a bow like frame 13, 15, 16, spaced apart to form the slot 4, the bows being supported at one end only on a carriage 14 with wheels 17 running on the top and underside of rails 18. The carriage (and thereby the slot) is traversed sideways by an endless chain 19 pulled by sprockets 20 driven by the motor 9. The motor 9 also rotates the rollers 2 and 3 on which the cover is rolled up at one end and unrolled at the other end whereby the slot 4 is traversed to the . required position. The slot is edged with light ropes 10 and 11 so that e.g. when the crane rope is swung sideways it bears on 10 or 11 operating a switch 23, Fig. 5, whereby the motor rotates in the required directions to move the slot 4 as above. The slot 4 diverges at 27 to facilitate entry of the crane rope. In a simpler form, Fig. 6, the slot 4 is moved by hand or electric power by rotating winding and underwinding drums 33 carrying ropes 32 and counterweights 31. The slot in this case comprises masked tongues of fabric 37. The whole fabric may be transparent. In Fig. 8, the slot 4 is kept at a width equal to the diameter of the crane rope 44 by a 4-armed fastener 38. The slot edges of the cover fabric have U-section pieces 41 and 42 attached, the piece 42, Fig. 10. carrying pins 43 which are held distanced from the other edge of the slot by a flange 40 on the arms 38. The crane rope 44 in traversing the slot 4 presses aside one arm 38 to allow the rope to pass, whereupon the succeeding arm 38 rotates into position to hold the slot 4 at the required width.
Patent GB-619087-A (GB)
Title: Improvements in or relating to the decarboxylation of 1:3-dialkyl-pyridofluorenone-4-carboxylic acids
IPC: C07D221/16
Filed: 1946-11-18
Abstract: 1,3-Dialkyl-pyridofluorenones in which the alkyl groups do not contain more than six carbon atoms are obtained by heating the correspondingly substituted pyridofluorenone-4-carboxylic acid in an inert organic liquid at a temperature of 250-320 DEG  C. to effect decarboxylation.  Liquids specified are aliphatic or aromatic high boiling hydroxylic compounds, esters, bases or hydrocarbons such as liquid paraffin, glycerol and butyl phthalate.  300-320 DEG  C. is the preferred temperature range.  Acid salts of the pyridofluorenones are obtained on treatment with acid the isethionates being preferred. In examples: (1) 1,3-dimethyl-pyridofluorenone is obtained by heating 1,3-dimethyl-pyridofluorenone-4-carboxylic acid in liquid paraffin, and (2) the isethionate thereof obtained by treatment with isethionic acid.
Patent GB-284599-A (GB)
Title: Improvements in or relating to mobile cranes
IPC: B66C23/36
Filed: 1927-12-16
Abstract: 284,599. Joret, G. Jan. 31, 1927, [Convention date]. Driving auxiliary parts, adapting vehicle driving - gear for. - The hoisting, luffing, and slueing movements of a portable crane are effected by two shafts 5, 6 driven through reversing-gear R from a cardan shaft 3 driven from the gear-box 1 of the motor-vehicle. Each shaft 5, 6 may be driven in either direction under control of clutch levers 55, 54. The gear R comprises a driving shaft 42, Fig. 3, driven from the cardan shaft 3, with spur pinions 43, 44 which drive wheels 45, 46 on the shaft 6a in opposite directions, and wheels 47, 48 on the shaft 5a also in opposite directions, the pinion 44 driving the wheels 46, 48 through an idle pinion. Friction clutches 50 on the wheels 45 - - 48 are controlled by two independent sliding sleeves 52, 53 so that either of the wheels 45, 46 and either of the wheels 47, 48 can be engaged with their shafts.
Patent GB-341608-A (GB)
Title: Improvements relating to belts, bands or the like for personal wear
IPC: A44B11/00
Filed: 1929-11-09
Abstract: 341,608. Belts &c. for personal wear. WALKER, Ltd., T., WALKER, G. T., and WOOD, H. H., Birmingham Buckle Works, St. Paul's Square, Birmingham. Nov. 9, 1929, No. 34244. [Classes 43 and 141.] A check device for limiting the expansion of a spring or elastic device for belts and the like for personal wear comprises a pair of links capable of telescoping on one another until they reach a point of engagement for preventing further movement. As shown a buckle 1 is attached to a spring 2 forming part of a waist belt. Links 9 attached one to the buckle and the other to the webbing of the belt slide on one another until closed loops 10 engage. The links may be flexible to enable them to conform to the required curvature when the belt or the like is worn.
Patent GB-1375887-A (GB)
IPC: B65D63/10
Filed: 1972-07-22
Abstract: 1375887 Tear-strips for opening packages SESAME INDUSTRIES Ltd 22 July 1972 34380/72 Heading B8C A tear-strip structure 10 comprising an elongated strip 11 having an adhesive coating 12 on one side thereof, and a tear-tape 13 adhesively bonded to said one side of said strip 10 longitudnally thereof and substantially midway between the side edges thereof is characterized in that the tear tape comprises a plurality of longitudinallyextending filaments 16 bonded together, by a hot-melt adhesive 17, said hot-melt adhesive being heat-activatable at temperatures greater than 60‹ C. such that the tape may be bonded to said elongated strip through heat activation and subsequent cooling thereof. As shown, the tape 13 has a width which is about one third of the overall width of the strip 11, and comprises a number of elongated, fibrous threads 16 of man-made, or natural, fibres such as cotton, or polyester, respectively which are embedded in a synthetic material 17 such as polymerized vinyl chloride hot-melt adhesive. The tear-strip 11 comprises a strip of kraft paper having a water-sensitive layer 12. The latter may alternatively be one which is pressure- or heatsensitive. A length of strip 10 may be cut to provide individual lengths with a pull tab 18 at one, and a complementary notch 19 at the other, end. In use, a strip 10 is applied, e.g. to bridge the closure flaps of a carton, the tape 13, which is not adhered to the carton, lying over the joint between the flaps. In an apparatus for making a strip a gummed strip (20) and a tape (22), supplied respectively from rolls (19, 21), are bonded together as they are fed, in superposed relationship, between a heated roll (24) and a co-operating pressure roll (25), and are cut into lengths by a cutter (26), Fig. 4 (not shown).
Patent GB-334447-A (GB)
Title: Improved method of and apparatus for burglar and fire alarm
IPC: H04M11/04
Filed: 1929-11-12
Abstract: 334,447. Larris, S., and Newman, V. E. Nov. 12, 1929. Burglar alarms.-In a burglar alarm one or more switches A are closed by the opening of a window or door, so as to close the circuit of an electrically driven gramophone 0 having a record giving an alarm, and also of a wireless transmitter D sending the alarm to a receiving station; in a fire alarm a thermally-operated switch E controls a gramophone G and the wireless transmitter D. The switches are connected in parallel. The thermal switch consists of a wire strained in a frame and carrying a plunger contact at the centre.
Patent GB-750987-A (GB)
Title: Improved wheel balance testing apparatus
IPC: G01M1/04
Filed: 1954-11-30
Abstract: 750,987. Testing wheel-balance. BOOTH, M. B. Nov. 30, 1964, No. 34596/54. Addition to 731,459. Class 106(2). The wheel-balance testing apparatus of the parent Specification is modified by the provision of a spring 21 for urging the locator ring 20 upwardly on the column 1 with its smaller end uppermost, the spring 21 being of sufficient strength to support the ring but yielding under the weight of a wheel to lower the wheel centrally against the disc 18 of the wheel carrier 8.
Patent GB-521923-A (GB)
Title: Improvements in dental instrument stands
IPC: A61G15/14
Filed: 1938-11-28
Abstract: 521,923. Dental stands. EBBERS, M., HELBIG, A., and MEWES, H. Nov. 28, 1938, No. 34613. [Class 81 (ii)] In a combined portable dental stand and cabinet wherein the stand forms an arm bent over the cabinet and mounted on a common base therewith, the cabinet is rotatable on the base. The floor and/or top of the cabinet may however be fixed in relation to the base and only the walls and contained drawers, slielves, etc., be rotatable. In the illustrated embodiment the base 6 is mounted on castors 5 and carries a central pillar 11 supporting the cover 10. The wall 1 containing the drawers 2 is rotably mounted on wheels 1a and ballbearing 22 and can be rotated by means of an attached foot-rail 8. The cover is hollow and contains coils 12 operated by knobs 13, controlling electrical instruments 16. A sterilizer 17 may be mounted on the cover. The stand 3 is attached to the base and cover. It carries electrical and pneumatic appliances 4 connected to cables and tubes 4a looped over pulleys P which can slide up a'rod R and are prevented from falling by catches (not shown) on the rods. These can be released by rotating the rod by means of pedal 9. The compressed air is generated by a pump 7b operated by motor 7a housed in the base of the cabinet. The hollow pillar 11 may be enlarged and serve as a compressed air reservoir. In another modification the stand 3 lies. within the circumference of the cabinet, the angular movement of which is accordingly limited. In a third modification the cabinet is polygonal.
Patent GB-1400133-A (GB)
Title: Signal amplivying circuit
IPC: H03F1/30
Filed: 1973-07-20
Abstract: 1400133 Transistor amplifier circuits; gain control SONY CORP 20 July 1973 [22 July 1972 (3)] 34635/73 Headings H3T and H4R In an amplifier in which a transistor 2, Fig. 2, biased by means of a similar transistor 6 stripped as a diode, the signal from source 1 being applied to the base of transistor 2 via a high value resistor 3 so as to constitute a current drive, the current gain is maintained constant by holding the collector potential of the transistor 2 at a fixed value. For this purpose, a further transistor 7 is connected between the transistor 2 and the load 5, its base being biased by means of the similar transistors 8, 9 strapped as diodes and in series with one another and the resistor 10. In a second embodiment, diode-connected transistor 8, Fig. 3, is arranged in series with the diode-connected transistor 6, and the amplifier is driven by a current source comprising emitterfollower 11 in series with a resistor 3. The Specification also describes the PNP circuit equivalent to that of Fig. 2 (Fig. 4, not shown). Gain control circuits.-The arrangement of Fig. 2 may be modified to provide a gain control circuit by interposing a resistor (12, Fig. 5, not shown) in the connection between base and collector of the diode-connected transistor (16), a controllable bias voltage being applied to the base over a resistor (12<SP>1</SP>). In an alternative arrangement, resistors 14, 19, Fig. 6, are connected between the diode-connected transistor 6 and the bases of transistors 2, 7 respectively and the gain is varied by means of a shunt transistor 15; the base of this is biased from variable voltage source 17 via resistor 16 and diode-connected transistor 18. In a further embodiment, gain is varied by variation of the base bias of transistor 7, Fig. 7: the bias is derived from a potentiometer comprising resistor 10 in series with diode-connected transistor 8 and the collector to emitter path of transistor 9. Resistor 22 is connected between base and collector of this transistor, the bias current being derived from variable voltage source 17 over resistor 16. In yet another embodiment, signal from source 1, Fig. 8, is applied to the base of transistor 2 via resistor 3, the base-emitter circuit being shunted by diode-connected transistor 6. Transistor 2 forms the common emitter impedance of a pair of emitter-coupled transistors 7, 7<SP>1</SP>: transistor 7 is fixed biased by means of a potentiometer comprising resistor 10 and diode-connected transistors 8, 9 whereas transistor 7<SP>1</SP> derives a variable gain-controlling bias from a potentiometer comprising resistor 10<SP>1</SP>, the collector to emitter path of transistor 8<SP>1</SP> and diode-connected transistor 9. Gain is controlled by means of variable-voltage source 17 which supplies base bias current to transistor 8<SP>1</SP> via resistor 16; the collector of transistor 8<SP>1</SP> is connected to its base by resistor 22.
Patent GB-1137447-A (GB)
Title: Machine tool
IPC: B23D35/00
Filed: 1967-07-27
Abstract: 1,137,447. Shearing; punching. W. A. WHITNEY CORP. 27 July, 1967 [1 Aug., 1966], No. 34680/67. Heading B3W. A machine tool for shearing various stock profiles or.punching strip comprises.a reciprocating ram 11 supported above a bed 13 which has a slideway along which a selected tool cartridge 34-37 may be moved from a carrier into engagement with the ram. Each cartridge has: a movable element 27 and fixed elements which co-operate to shear the stock when the movable element is reciprocated by the ram. The carrier has a series of roller tables from which each., cartridge is manually fed on to the bed. The ram is hydraulic or pneumatic and its lower end has a T-shaped groove 42 into which the head 41 of the movable element engages as the cartridge 'is moved along the slideway. The cartridge 34 for shearing angles 20 comprises a blade 27, Fig. 11, with a cutting edge 28 which co-operates with fixed dies 29. The cartridge is positioned by an adjustable stop 43 and clamped by clamps 44. Each cartridge has a base 53 which fits in the slideway formed by plates 67, 68. Each blade has a pair of studs 62 which are adjustable to align the head 41 with the groove in the ram. The cartridge 35 for shearing bar stock, comprises front and. rear plates (83), (84), Figs. 9 and 10 (not shown), and a central plate (87) with a head (41) to engage the ram. Various size bushings (88)- (90) are provided in the front plate which cooperate with an identical set in the central plate. The head of the central plate does not enter a groove at the end of the ram but merely abuts the ram. A spring (95) is provided to move the central plate into alignment with the front plate. The cartridge 37 for shearing channels comprises a U-shaped body within which a blade 30 is reciprocated. A clamping mechanism is provided for various widths of channel and comprises two blocks 101 threaded on to two screens 102. Sprockets 104 on the screws are driven by chains 105 so that when the drive shaft 108 is rotated the blocks either move towards or away from the channel marker. The drive for the shaft 108 may be a reversible rotary motor 111 or a reciprocating motor. A further tool cartridge for punching comprises a punch holder (122), Figs. 13 and 15 (not shown), carrying a punch (125) aligned with a die (127). The die is mounted on the lower arm of a C- shaped frame (124) and the punch holder guided in a bore (130) in the upper arm. The frame (129) is mounted on a base (53) which engages in the slideway and can be moved to various positions relative to the base and held by a plunger (134) engaging in recesses (133). The length of the stroke of the ram for each of the cartridges can be altered by rotating a vertical shaft to one of six selected positions so that limit switches (151), (153) are actuated by a pair of cams (147), (148), aligned therewith to stop the downwards or upward motion of the ram by stopping the supply of fluid to the cylinder of the ram.