baber/WOPTO huggingface dataset:
Patent GB-420955-A (GB)
Title: Improvements in or relating to devices for viewing stereoscopically photographed pictures or motion pictures projected on a screen or the like
IPC: G03B35/16
Filed: 1934-04-18
Abstract: 420,955. Stereoscopic kinematography. THEGE, E. O. P., 59A, Hornsgatan, Stockholm. April 18, 1934, No. 11726. [Class 97 (i)] Each spectator of alternately - projected stereoscopic pairs of images is provided with a frame containing one or two travelling endless strips having transparent portions through which each image is viewed with the appropriate eye ; the strip is arranged so that one part moves forwardly across the field of view and another part returns across it in close proximity to the forwardly moving part. As shown in Figs. 1 and 2, the frame is provided with handles 12, 13, and contains one strip 8 passing round rollers 4-7 arranged so that two parts of the strip are in close proximity in front of eye openings 2, 3. The roller 4 is toothed to engage perforations in the strip and is driven by an electric motor in the handle 12 ; the stator 16 of the motor is carried by a casing 17 held between a nut 18 and a flange on the handle so as to be capable of rotary adjustment to synchronize the changes of view and of projection. The length of each transparent space on the strip, and the circumference of the roller 4, may be equal to the distance between the centres of the openings 2, 3 ; various other possible relations between these dimensions are set out in the Specification. Fig. 9 shows a modification in which two strips 55, 56 travel vertically, one before each eye, over rollers 62, 53, 54, the roller 52 being driven by a flexible shaft 72 from a motor 73. The stator of the motor may be carried by a casing 69 rotatable for synchronism and held in adjusted position by a spring 70 and notches 74. The motor may drive the shaft 72 through gearing, and may drive two or more viewing apparatus. The shape of the apparatus may be such that the paths of the two strips converge, so as to provide a nose aperture of convenient shape, the roller 52 being then divided into parts having different axes and connected by a flexible coupling or bevel. gearing &c. Small openings may be provided between the transparent parts of the strip to admit light to the eye which is not in use for viewing an image.
Patent GB-1516935-A (GB)
Title: Loudspeaker systems
IPC: H04R1/26
Filed: 1976-03-24
Abstract: 1516935 Loudspeakers DECCA Ltd 13 Jan 1977 [24 March 1976] 11904/76 Heading H4J A loudspeaker system comprises at least two acoustic radiators 3, 4 (Fig. 6) which respond optimally to electrical signals in overlapping frequency ranges and which are mounted to radiate from coplanar mouths. An acoustic delay (as shown, exponential horn 11) for the higher frequency radiator 3 compensates for phase delay introduced by the radiator 4 in the overlapping frequency ranges. This is caused by displacement of the effective source of signals radiated by the lower frequency radiator 4 from the plane of the mounting panel 10 towards the apex of the cone of radiator 4. Preferably the horn 11 has a rectangular mouth 150 mm wide and 76 mm high and is mounted immediately above radiator 4. A vertical partition (12) Fig. 7 (not shown) may be disposed in the mouth of the horn 11 to increase horizontal dispersion of high frequency waves from the treble loudspeaker. The delay introduced by the horn 11 matches the delay introduced by the radiator 4 at the cross-over frequency. A known cross-over network (Fig. 2, not shown) comprising LC complementary high pass and low pass filters may be used and phase reversal at the cross-over frequency may be compensated by reversing the polarity of the connections of either the radiator 3 or the radiator 4. This arrangement provides a progressive phase shift through the entire audio frequency range. A more complex filter (Fig. 8) has an input buffer amplifier 21 fed from input terminals 20 and which feeds a high pass filter 22 comprising an emitter follower and a T-section RC filter. The output of the high pass filter is fed through a capacitor Cl and an adjustable potentiometer to a treble amplifier 23. The capacitor C 1  is chosen to provide progressive attenuation of the low frequency signals fed to amplifier 23 to offset overemphasis of signals in the low frequency part of the frequency range of radiator 3. The adjustable attenuator enables the sensitivity of the treble channel to be equalized with that of the bass channel. The ouput of the high pass filter 22 is also fed to one input of a subtractor 24 which also receives the full band-width preamplified input signal. Because the high pass filter has unity gain in its pass band the output of subtractor is the exact complement of the output of the high pass filter 22. The output of subtractor 24 is fed to a bass power amplifier 25 through a CR equalizer 26 whose values may be chosen to control a possible tendency of the radiator 4 to increase its acoustic output at the high end of its frequency range.
Patent GB-653458-A (GB)
Title: An improved catapult
IPC: F41B3/02
Filed: 1948-04-30
Abstract: 653,458. Toy projectors. BIELCZYK, J. L. April 30, 1948, No. 11912. [Class 132 (iii)] A catapult, made of wood, &c. comprises a pair of arms 6, 6; which are integral with a hand grip 1 and are formed with lower and upper rectangular cuts 7, 71 respectively and terminate in projections 12 to which the ends of a pair of elastic strings 15 are secured by thread 14 looped through holes 13 therein, the other ends of the said strings being secured to an ejector or pouch 18, of strong leather or nylon, by threads 17 passing through holes 20 in the latter. The ejector 18 has a backsight 19, in the form of a bead, notch or sight hole, for association with a foresight comprising pairs of opposed grooves 9, 10, or a single central groove 11, on the inside of the arms 6. Preferably the grooves 9 are extended through forward projections 8 on the arms to facilitate the setting of the catapult. The hand grip 1 has a convex front edge terminating in a protrusion 5 and is provided with a thumb groove 3 above a rear extension 2 thereof.
Patent GB-304083-A (GB)
Title: Improvements in and connected with mud-guards for cycles and the like
IPC: B62J15/02
Filed: 1928-04-24
Abstract: 304,083. Rumble, A. J. April 24, 1928. Mudguards.- Means for attaching mudguards to pedal cycle frames comprises brackets 11, 18 provided with open slots s into which screws 8, 16 respectively are inserted and secured by wing- nuts. The lower bracket 11 is clipped to the fork by a band 10 and the upper bracket is secured to the crown 19 by a screw 21. The rearwheel mudguard is secured to the bridge-piece 20, Fig. 5, by a bracket 18 which is slotted to pass between a washer 22a and a wing-nut 23 by which it is clamped. The other end of the bracket is similarly slotted and is engaged by at wing-nut 16<a> secured to the mudguard 1.
Patent GB-807230-A (GB)
Title: Control device for knitting machines
IPC: D04B15/66
Filed: 1955-04-26
Abstract: 807,230. Knitting-machines. SOMMER, H. April 26, 1955 [April 28, 1954; Aug. 3, 1954], No. 12054/54. Class 74 (2). A pattern portraying, to some scale or scales, the final shape of an article to be produced by a sliding needle flat bed machine is moved, by adjustable variable speed automatic means, in steps of a length determined by the loop size previously ascertained by the knitting of a trial sample, and such that, at the knitting of each course, means determining or indicating the needles to knit in that course is in contact with the appropriate coursewise line of the pattern. In Fig. 1 the pattern 12 is borne on a cylinder 10 racked round by a ratchet and pawl of variable stroke, or through opposed cones 18, 22 and a manually traversible drive transmitting roller 24 from a shaft 20 stepped round by a friction ratchet actuated at the start of each course. A spring 84 can be stretched by a hand wheel 80 and lead screw 78, and bears feelers 90, one per turn, the aligned free ends of which bear on the cylinder. Alternatively the feelers may be mounted on discs separated by leaf springs. The rate of rotation of the cylinder is set to that appropriate to the yarn count and stitch size required; and the spacing of the feelers is set to conform to the loop pitch along the course. The feelers may be coupled mechanically to known widening and narrowing means. Alternatively, the presence or absence of part of the pattern under a feeler may determine the flow or not of an electric current and hence the actuation or not of a light or other signal, warning that a needle must be introduced or withdrawn. When the operation is electrical, one device may control a plurality of machines. The pattern may be on a linearly movable flat table, or it may be wound from one to the other of two rollers. In Fig. 5, the pattern bearing strip is pressed by rollers 103 against a drum 101 moved in dependence on the movement of the machine carriage ; and a scale 105, divided in both directions from a central zero, in accordance with the desired pitch, indicates the appropriate setting of the machine. One scale may be changed for another, by reason of a resilient element 110, Fig. 6, which grips the scale and can pivot about a shaft 111. The length and/or width of the pattern may be in some ratio other than unity to the corresponding final dimension of the article.
Patent GB-120563-A (GB)
IPC: B29D30/10
Abstract: 120,563. Goodyear Tire & Rubber Co., (Assignees of Harsel, W. B., and Nall, E. A.). Nov. 3, 1917, [Convention date]. Moulding wheel tyres.-In a machine for building-up the fabric foundation of a tyre cover comprising a rack for supporting the various stock rolls, with means for positioning a selected roll into working relation with a rotary mandrel, the mandrel is carried on extensible arms 4 of a chuck 5 rotating with the shaft 13.
Patent GB-762612-A (GB)
Title: Method of and apparatus for roasting, drying and cooling foodstuffs
Inventor: SCHYTIL FRANZ
IPC: A23L3/50
Filed: 1954-04-26
Abstract: 762,612. Roasting foodstuffs. METALLGES. AKT.-GES. April 26, 1954, No.12059/54. Class 58. [Also in Group XIII] In roasting a foodstuff, e.g. coffee, cocoa, groundnuts, grain, or malt, the foodstuff is fluidized in a current of hot gas in an upwardly flaring grateless shaft having at its lower end an angle of flare α between 3 and 12 degrees, preferably 6 degrees. The speed of the hot gas may be between 25 and 60 metres per second. For example, coffee beans are fed pneumatically from a reservoir 6 into the upper end of a shaft comprising sections 1, 2, 3 and 4 having respectively increasing angles of flare α, #, γ and #. Air supplied by a fan 9 and heated in a heat-exchanger 10 is fed into the lower end of the shaft through a chamber 14, a nozzle 5, and a neck 34 and leaves through a braking zone 17. The beans may be roasted at a mean temperature of 220‹C. for a period between 95 and 110 seconds. On opening a valve 15 in the base of the chamber 14 the roasted beans drop into a cooling chamber 22 where they undergo fluidized cooling, over a grate 23, in a current of air drawn upwardly through the grate by a fan 26 acting through a cyclone 28 and a pipe 27. The cooling chamber is also connected with the cyclone through a suction tube 31, a valve 30 and a pipe 29 so that, when the valve 30 is opened, the cooled beans pass into a reservoir 32 beneath the cyclone. Using air at a temperature of 20‹C., roasted beans may be cooled to 25‹C. in 90 seconds.
Patent GB-640606-A (GB)
Title: Improvements relating to means for establishing and maintaining a finely-finished surface on the metal flanged ends of bobbins, spools, and the like
IPC: B21D19/00
Filed: 1948-05-03
Abstract: 640,606. Axial rolling; reworking worn articles. HIGH DUTY ALLOYS, Ltd., and STANDRING, J. R. May 3, 1948, No. 12086. [Class 83 (iv)] Means for establishing and maintaining or restoring a finely-finished surface on the metal flanged ends a of bobbins, spools and the like comprises three or more relatively-displaceable rollers 3, 8 carried by a frame and disposed about the bobbin flange for application thereto by pressure, each roller being profiled inversely to the bobbin flange profile and at least one of them having tangential sides which contact the bobbin flange before the full profile of its surface comes into contact with the flange. The frame, Fig. 1, comprises a pair of members 1 pivotally connected at 2 and linked together by rods 5 which are adjustably secured to the members 1 and carry the swaging roller 8. The bobbin A is rotated and the flange a thereon located between the roller 8 and the follower rollers 3 which are pivoted on the members 1. As the members 1 are drawn together, extended flanges on the roller 8 shape the sides of the spool flange before forming a radius on the crown. A spring-pressed pawl 10 co-operates with the periphery of the roller 8 to remove metal dust and foreign matter therefrom. In the modification shown in Figs. 3 and 4, the stem and base of the bobbin are polished and the bobbin is checked for true running as it is rotated by a high-speed motor B through a clutch D driving the bobbin shaft E. A control lever M is operated to disengage the clutch D which automatically applies a hand brake F; further operation of the lever M couples the bobbin shaft E to a slow-speed motor G which causes a shaft H to operate a toggle mechanism H<SP>2</SP> and feed the rollers 3, 8 into engagement with the flange a of the bobbin. The final rolling pressure may be applied to the rollers by a handlever or a motor-driven hydraulic generator; in the latter case the rollers 3, 8 are mounted on plungers actuated by cylinders K<SP>1</SP>. On completion of the operations, the lever M is operated to disengage the clutch D, return the toggle mechanism H<SP>2</SP>, and, if necessary, release the hydraulic pressure in the cylinders K<SP>1</SP>. Instead of driving the bobbin directly, it may be driven indirectly through the rollers.
Patent GB-673495-A (GB)
Title: Electronic high precision dial gauge
IPC: G01B7/00
Filed: 1950-05-15
Abstract: 673,495. Frequency and capacitance measurements. SOC. ANON. DITE ETABLISSMENTS E. BELIN. May 15, 1950 [May 16, 1949], No. 12089/50. Class 37. [Also in Group XXXVIII] The output frequency of a single tube phase-shift oscillator is determined by the distance apart of plates 2, 3 of a linear dimension gauge condenser 1 which forms with resistance 7 the final mesh in the phase-shifting network of the oscillator. The output of the oscillator is taken through an amplifier 15 and transformer 16 and applied across series resonant circuits 17, 18 respectively tuned above and below a selected output frequency corresponding to a standard or comparison dimension between condenser plates 2, 3. The two coils 19, 20 of a ratiometer are fed with D.C. through rectifier/resistance combinations in the resonant circuits 17, 18. In use, for example with operation of the gauge condenser 1 producing an increase in frequency of the oscillator output the current through coil 19 increases and the current through coil 20 decreases so that the ratiometer pointer takes up a position indicative of the dimension undergoing measurement. As shown, a centre-zero milliammeter may be used instead of the ratiometer.
Patent GB-1211274-A (GB)
Title: A device for cooling the compressor and condenser of a refrigerator
IPC: F25D23/00
Filed: 1968-03-13
Abstract: 1,211,274. Refrigerators. INDUSTRIE A ZANUSSI S.p.A. 13 March, 1968 [21 March, 1967], No. 12274/68. Heading F4H. A fan 5 mounted on the bottom insulated wall 11 of a refrigerator cabinet 1 draws air through apertures (not shown) in the bottom wall of the machinery compartment and. discharges air over the compressor 4, the cabinet being positioned adjacent a wall 13 so that after leaving the compressor the air is constrained to flow vertically over the condenser 3 mounted on the rear wall 12 of the cabinet. 5 is preferably a tangential flow fan (Fig. 3, not shown) discharging an air stream of substantially rectangular cross-section, and may be thermostatically controlled so as to be energized concurrently with the compressor.
Patent GB-1298597-A (GB)
Title: Force commutation circuits for controlled rectifiers
IPC: H02M1/08
Filed: 1970-03-16
Abstract: 1298597 Commutating thyristors WESTINGHOUSE ELECTRIC CORP 16 March 1970 [3 April 1969] 12450/70 Heading H2F A circuit for controlling the output of a D.C. Source E comprises a pair of main controlled rectifiers Sp1, Sp2 connected to respective poles of source E, a pair of commutating controlled rectifiers Sc1 Sc2 and a pair of uni-directionally conductive devices D1, D2 connected in a bridge such that the main controlled rectifiers Spl, Sp2 form opposite arms whilst the remaining arms are formed by the commutating controlled rectifiers Sc1 Sc2 and the uni-directionally conductive devices D1, D2 respectively. A commutating capacitor C is connected across the bridge and is arranged to be charged alternatively with opposite polarities, the respective polarities being appropriate for the alternate commutation of the main controlled rectifiers Sp1 Sp2. Fig. 4 shows a circuit for periodically interrupting the D.C. supply B+, B- to a threephase inverter for commutation purposes. Assuming capacitor C is charged with the polarity shown, the main thyristor Sp1 may be turned off by triggering commutation thyristor Sc1 which discharges capacitor C via diode D1 in the reverse direction through Sp1. Capacitor C then charges in the reverse direction through diode D1 and the inverter after which the supply to line B + is interrupted. After retriggering the main thyristor Sp1, any of the main inverting thyristors Sa1...Sc2 from which their gating signals have been removed will no longer be conductive. The next commutating operation is achieved by triggering commutating thyristor Sc2 which turns off main thyristor Sp2 in a similar manner. Appropriate ones of feedback thyristors SA1<SP>1</SP>...SC2<SP>1</SP> should be turned on during commutation so as to provide for reactive current. Fig. 3 (not shown) relates to a D.C. chopper in which the main thyristor is bypassed by a bridge of four thyristors shunted by a commutating capacitor.
Patent GB-1202820-A (GB)
Title: Improved cam system for automatic jacquard flat knitting machines
IPC: D04B15/36
Filed: 1969-03-10
Abstract: 1,202,820. Knitting-machines. H. STOLL, G. STOLL, E. STOLL, E. STOLL, J. STOLL, A. STOLL, R. F. STOLL and M. STOLL. 10 March, 1969 [23 March, 1968], No. 12483/69. Heading D1C. A cam assembly in a double lock for a jacquard flat parallel bed knitting-machine equipped with loop transfer mechanism has provision for effecting selection of jacks and needles to enable loop transfer to occur at opposite ends of the cam plate. In this purpose a main jack section Ha at each end has retractible cams 15, 16 selectively operated to raise or otherwise the needles into co-operation with needle cams 12, 13, 14 likewise positioned at each end to cause the selected needles of both beds to effect loop transfer. The cam locks have a needle actuating section Na, a main jack actuating section Ha and an auxiliary jack actuating section Hi. In addition to selection for loop transfer the main and auxiliary jack sections are effective according to the jacquard selection to achieve stitch and pattern variation.
Patent GB-544364-A (GB)
Title: Telephone circuits
IPC: H04M1/58
Filed: 1940-05-17
Abstract: 544,364. Substation circuits. STANDARD TELEPHONES & CABLES, Ltd. May 17, 1940, No. 12490/41. Convention date, June 10, 1939. Divided out of 542,643. [Class 40 (iv)] [Also in Group XL] For avoiding side-tone and room noise effects, a telephone set is provided with one or more amplitude-filters in the form of bridge circuits which are balanced for all levels above a given limit or for all levels below a given limit. In circuits for eliminating room noise, a high-pass amplitude filter R2, V, Rp is inserted between the transmitter T and the receiver R, Figs. 9, 10 (not shown) and Fig. 11. 'In arrangements for eliminating side-tone, an amplitude-filter of the low-pass type is associated with the receiver R and disables it when the transmitter T is spoken into, Figs. 12 to 14 (not shown) and Fig. 15. In other arrangements, Fig. 16 (not shown) and Fig. 8, a high-pass amplitude-filter is associated with the transmitter T and a lowpass amplitude-filter with the receiver R to give both advantages.
Patent GB-1144905-A (GB)
Title: Substituted bis-(2-carboxy-chromonyl-oxy) derivatives and preparation and pharmaceutical compositions thereof
Inventor: FITZMAURICE COLIN
IPC: C07C45/71
Filed: 1965-03-25
Abstract: 1,144,905. Chromone derivatives. FISONS PHARMACEUTICALS Ltd. 3 March, 1966 [25 March, 1965; 9 Dec., 1965; 17 Dec., 1965], Nos. 12626/65, 52414/65 and 53744/65. Heading C2C. [Also in Division A5] The invention comprises bis-chromonyl compounds of the formula and functional derivatives of carboxylic acid groups present in which R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, R<SP>4</SP>, R<SP>5</SP> and R<SP>6</SP> are the same or are different and each is a hydrogen or halogen atom or a hydroxy, alkyl, alkoxy, or substituted alkyl or alkoxy group and X is a saturated or unsaturated, substituted or unsubstituted, straight or branched hydrocarbon chain which may be interrupted by a carbocyclic or heterocyclic ring or one or more oxygen atoms or carbonyl groups, which are prepared by reacting in one or more stages a compound and a compound A-X<SP>1</SP>-B, in which Z is a hydroxy group and Y a hydrogen atom, a group -COCH 3 , or -COOR<SP>1</SP> (in which R<SP>1</SP> is an alkyl group), or Y and Z together form a chain (W is a carboxylic group or derivative or a group convertible thereto); Y<SP>1</SP> and Z<SP>1</SP> have the same meaning as Y and Z and may be the same as or different from Y and Z; A and B are the same or are different and each is a group capable of reacting with a hydroxyl group to form an ether linkage, or one of A and B is a group capable of being converted to such a reactive group; and X<SP>1</SP> is such that the group (in which A<SP>1</SP> and B<SP>1</SP> are the residues of A and B after the formation of ether linkages has the same meaning as X and thereafter converting Z and Y and Z<SP>1</SP> and Y<SP>1</SP> to chains or functional derivatives thereof to form the bis-(chromone-2-carboxylic acid). A preferred compound is 1,3-bis-(2-carboxychromon-5-yloxy)-2-hydroxypropane and many other compounds are claimed. Salts of the compounds with suitable cations, such as alkali and alkaline earth metals and organic bases are also described. Several embodiments of the preparation are described, for example the reaction of o-hydroxy-acetophenone with an oxalic acid derivative of formula in which R<SP>9</SP> is a halogen atom or a group -OR<SP>1</SP> (R<SP>1</SP> is alkyl) R<SP>10</SP> and R<SP>11</SP> are both halogens and R<SP>12</SP> is a group OR<SP>1</SP> or R<SP>10</SP> and R<SP>11</SP> together represent a carbonyl oxygen atom and R<SP>12</SP> is a halogen or -OR<SP>1</SP>. The compounds are used in pharmaceutical compositions in the treatment of asthma (see Division A5).