baber/WOPTO huggingface dataset:
Patent GB-1021536-A (GB)
Title: Improvements in and relating to self-controlled dc/ac inverters
IPC: H02M7/44
Filed: 1963-12-13
Abstract: 1,021,536. Valve and transistor oscillatorinverter circuits. BROWN, BOVERI & CO. Ltd. Dec. 13, 1963 [Dec. 17, 1962], No. 49281/63. Heading H3T. The invention relates to free running inverter circuits utilizing gas discharge or like semiconductor valves and concerns the use of series tuned commutating circuits for switching off the valves. Fig. 2 shows a push-pull type freerunning inverter comprising two gas discharge or like semi-conductor valves 1, 2 which are rendered alternatively conducting by feed-back means, not shown, to produce a square wave output in the secondary winding 5. When valve 1 is fired, current flows through winding 3 to produce the first half-cycle of the output wave. At the same time the capacitor 15 of a tuned circuit 15, 16 charges to a value twice the supply voltage through a circuit comprising diode 11 and the valve 1. Towards the end of the first half-cycle of the inverter output a gas discharge or like semi-conductor valve 7 is fired allowing the capacitor to discharge resonantly. The discharge current flows in the inverse direction through valve 1 until it exceeds the forward current when valve 1 is thus extinguished and the current transfers to diode 9. Shortly afterwards, valve 2 is fired, initiating the second half-cycle during which the voltage across winding 3 causes capacitor 15 to recharge resonantly through inductor 16 and valve 7. When the capacitor is charged to twice the supply voltage current continues to flow through a diode 13 and valve 7, discharging inductor 16. Valve 7 then extinguishes and capacitor 15 discharges resonantly through inductor 16, diode 11 and winding 3. A similar quenching circuit is provided for valve 2. It is stated that inductors 16 and 18 in the quenching circuits could be replaced by inductors having square loop cores and bias windings. Fig. 3 (not shown) illustrates a series-type inverter with a similar quenching arrangement, though a common resonant circuit 15, 16 may be used for the two halves of a circuit (Fig. 11, not shown). The push-pull and series arrangements may be combined to form a bridge-type circuit (Fig. 13, not shown), in which case, by suitably phasing the two branches, particular harmonics can be suppressed.
Patent GB-1466606-A (GB)
Title: Side stand for motorcycle
IPC: B62H1/02
Filed: 1974-11-15
Abstract: 1466606 Motorcycle side stand HONDA GIKEN KOGYO KK 15 Nov 1974 [16 Nov 1973 2 Aug 1974 (2)] 49590/74 Heading B7J A pivoted side stand 1 for a motorcycle includes a rubber block 7 adjacent the stand foot 1a which extends below the foot and is compressed by the weight of the motorcycle when resting against the side stand. The holder 5 for the rubber block includes an extension 6 preventing deflection of the block in the longitudinal direction of the motorcycle and a curved tongue 8.
Patent GB-1508929-A (GB)
Title: Aqueous shampoo compositions
IPC: C11D1/94
Filed: 1976-11-30
Abstract: 1508929 Shampoo GILLETTE CO 30 Nov 1976 [22 Dec 1975] 49934/76 Heading C5D An aqueous shampoo composition comprises water in combination with an ampholytic surfactant which is a 2-alkyl-substituted imidazoline, a nonionic surfactant which is: (a) a condensation product of ethylene oxide with a base formed by condensing propylene oxide with propylene glycol, and having a molecular weight of 1,000-15,000, (b) a condensation product of propylene oxide with a base formed by condensing ethylene oxide with ethylene glycol and having a molecular weight of 1,000-10,000, or (c) a condensation product of ethylene oxide with a base formed by condensing propylene oxide with ethylenediamine and having a molecular weight of 1,000-30,000, and an anionic surfactant which has the formula: where R is a hydrocarbon radical of 4 to 18 carbon atoms, n is a whole number from 5 to 30 inclusive, and M is an alkali metal, ammonium or a lower mono, di or tri-alkanolamine in which the alkyl groups contain from one to four carbon atoms, the composition containing from 6À0 to 15À0% by weight of the ampholytic surfactant, the weight ratio of the total of the nonionic and anionic surfactants to the ampholytic surfactant being from 1:1 to 5:1, and the weight ratio of the nonionic surfactant to the anionic surfactant being from 0À5:1 to 10:1.
Patent GB-1202726-A (GB)
Title: Solid-state vhf attenuator and tv receiver
Inventor: WILCOX DONALD LEE
IPC: H03G1/00
Filed: 1967-11-03
Abstract: 1,202,726. Semi-conductor devices. TEXAS INSTRUMENTS Inc. 3 Nov., 1967 [30 Dec., 1966], No. 50087/67. Heading H1K. [Also in Divisions H3 and H4] A PIN diode used in an R.F. attenuator of variable gain (see Divisions H3-H5) comprises a high resistivity substrate 62 of silicon or gallium arsenide, on which three heavily doped p-type diffused regions 63, 64, 65 are formed: boron may be used. Interposed between these regions are heavily doped N-type diffused regions 66, 67: phosphorus may be used. The diffusions are relatively shallow, high resistivity regions 68-71 being left between the edges of adjacent regions. Contact is made with the P-type regions by finger portions 76a-76c of a metallized contact 76 which pass through openings formed in oxide insulating layer 78: similarly contact is made with the N-type regions by fingers 80a, 80b of a metallized film 80. The metallized films may be vapour deposited at the same time and comprise a laminate of gold over an extremely thin film of a metal having a high eutectic with silicon, e.g. molybdenum, vanadium, platinum, nickel or tungsten.
Patent GB-1519170-A (GB)
Title: Method of binding brochures
IPC: B42C5/04
Filed: 1975-12-10
Abstract: 1519170 Bookbinding MARUMIYA SHOKO CO Ltd 10 Dec 1975 [18 Sept 1975] 50598/75 Heading B6A To produce a plurality of bound volumes, a pile of sheets 1 has covers incorporated therein to define the volumes. Notches 6 are cut out of the spine edge during trimming thereof, and adhesive 7 is applied. A backlining sheet 4 is then attached and after setting of the adhesive the volumes are sliced from the pile. The notches may be trapeziform, oblong, rhombic or wedge shaped. The adhesive may be synthetic resin, glue or starch based.
Patent GB-1124100-A (GB)
Title: Lathes
IPC: B23Q5/26
Filed: 1965-11-29
Abstract: 1,124,100. Lathes. BURTON S.A., and A. PROFIT, M. VILCOT, and R. GATHELOT. 29 Nov., 1965, No. 50655/65. Heading B3T. In order to allow for simultaneous machining by front and rear tools 7, 31, Fig. 2, mounted on the cross-slide 2 of a lathe there is mounted on the cross-slide a block with two associated hydraulic cylinders 9<SP>1</SP>, 14<SP>1</SP>, one of which, 9<SP>1</SP>, has a piston-rod 121 coupled to a tool slide 24<SP>1</SP> carrying the tool 31, while the piston-rod 17<SP>1</SP> of the other cylinder is connected to a stationary point 30 on the longitudinal slide 4 of the lathe. The cylinders are interconnected by lines 19<SP>1</SP>, 20<SP>1</SP> to form a closed hydraulic circuit and the areas of the pistons 18<SP>1</SP>, 13<SP>1</SP> are chosen, e.g. in the ratio 2 : 1 so that relative displacement between cylinder 14<SP>1</SP> and its stationary piston 18<SP>1</SP> is accompanied by proportional relative displacement between cylinder 9<SP>1</SP> and piston 13<SP>1</SP>. Thus displacement of the cross-slide 2 to move tool 7 towards the workpiece axis XX can be made to effect equal and opposite movement of tool 31. Tool slide 24, Fig. 1, is mounted on the block 1 by means of a dovetail 23 and dovetail slideway 22 and the two cylinders 9, 13 may be bored in the one block and connected by passages also bored therein. An adjusting screw thread is provided on the piston rod 27 to provide for fine adjustment of the tool slide 24 relative to the piston 13 and block 1. Two tool slides (24<SP>11</SP>, 35) (Fig. 3, not shown) may be mounted on the block at an adjustable distance apart. In one application of the block (Fig. 4, not shown) one cylinder (14<SP>111</SP>) is mounted so that its piston-rod (17<SP>111</SP>) is displaced with an hydraulically operated copying tool (41). The displacement is transmitted to the piston (12<SP>111</SP>) of the block to allow for copy-machining with two tools simultaneously, the areas of the cylinders being equal in this case. The copy tool may be arranged to produce a profile which is an exact replica, the converse or some other function of the master profile. In an arrangement in which the cylinder areas are in the ratio 1 : 2 and the template profile is a 2 :1  reduction of the desired profile, one tool takes a roughing cut and the other a finishing cut on the workpiece.
Patent GB-1278573-A (GB)
Title: Improvements in or relating to gramophone record players
Inventor: NEWBOROUGH LEONARD
IPC: G11B3/60
Filed: 1968-10-25
Abstract: 1278573 Gramophone base-plate PLESSEY CO Ltd 6 Jan 1970 [25 Oct 1968] 50684/68 Heading G5R In a gramophone, rumble is reduced by mounting the record turntable 1 and drive unit 9 on a base-plate 4 formed of a laminate comprising a vibration absorbing layer 8 of copolymer vinyl acetate between outer layers 6, 7 of steel sheet.
Patent GB-1292989-A (GB)
Title: Light beam deflection
Inventor: FOURNIER GERALD RAYMOND
IPC: H04N3/08
Filed: 1969-10-16
Abstract: 1292989 Optical scanning TEXAS INSTRUMENTS Inc 16 Oct 1969 [31 Dec 1968] 50970/69 Heading G2J [Also in Division H4] A pair of mirrors 46, 48 oscillate with angular displacements K sin wt and 1/9 K sin 3 wt, and are relatively phased and disposed so that light from paths 24 and 26 is reflected from a respective mirror of the pair to the other mirror to undergo a total deflection # 1  or # 2  respectively, where # 1  = -# 2  = K (sin wt -1/9 sin 3 wt), i.e. two approximately triangular waveforms displaced by 180 degrees, the paths 24, 26 being alternately selected at a rate such that 180 degree portions of the two waveforms # 1 , # 2  provide successive ramp portions of an approximated sawtooth waveform. As shown in the display system of Fig.3, a laser beam 12 is modulated at 14, switched between paths 24, 26 by a further mirror pair 42, 44, and the horizontal scanning output from mirror pair 46, 48 is deflected vertically by a mirror 32 before falling on a screen 34. Mirrors 42 and 44 have angular displacements k sin wt and 1/3 k sin 3 wt, and are phased to give a total angular deflection k (sin wt + 1/3 sin 3 wt) approximately a square, switching, waveform, Fig.2E (not shown). In a modification, Fig.6 (not shown) mirrors 42 and 44 are replaced by a single mirror which oscillates between two limiting positions under the control of a horizontal sync pulse. In a further modification, Fig.7, the beam 12 is reflected by an oscillating mirror 66 through a lens 70 to inclined mirrors 72, 74 for separating paths 24, 26. Light from the mirrors 72, 74 via lens 70 is again reflected at mirror 66 to remove the oscillating motion and passes along path 24 or 26. As well as for use in a display system, the scanner may be used for flying spot scanning e.g. for fascimile, Fig.10 (not shown) or television. A torsional magneto-stricture drive is used to controllably energize each mirror 42, 44, 46, 48, Fig.5 (not shown).
Patent GB-1434822-A (GB)
Title: Displacement coating processes and compositions
IPC: C23C18/16
Filed: 1973-11-06
Abstract: 1434822 Plating Zn articles PYRENE CHEMICAL SERVICES Ltd 6 Nov 1973 [6 Nov 1972 11 Jan 1973] 51392/73 Heading C7F An acidic displacement plating solution contains Ni, Fe, or Co, has pH 1-4À5 and contains 0À073-50 g/l of at least one of Sb, Cu, Pb, Ge, V, As or W in ionic form. Zn or Zn-based alloy is plated by contact with an acidic solution containing Fe, Co or Ni, there being included in the solution, or in a solution which contacts the Zn before the plating solution, ions of Sb, Sn, Cu, Pb, Ge, V, As and/or W. The ion source may be Na or K antimonyl tartrate, K Sb oxalate, Na tetrachloro- or tetrafluo-antimonate, Sb chloride, SnCl 2 , Sn(BF 4 ) 2 , Sn acetate, CuCl 2 , CuSO 4 , Cu citrate, Pb(NO 3 ) 2 , PbCl 2 , Pb acetate, Ge chloride, Ge oxide, NH 4  metavanadate, Na arsenate, NaH arsenate, NH 4  Mg arsenate, NH4, Na or K tungstate; 0À001-50 g/l of ion (as element) is used in the process; the acid may be HCl, H 2 SO 4 , HF, H 2 SiF 6 , citric, acetic, or oxalic (1-150 g/l); a buffer or 0À1-50 g/l of complexant such as tartaric, citric, malic, oxalic or succinic acid or salt may be added. The solution may contain 0À1-50 g/l Fe, Co, or Ni, suitable salts being listed; a degreased, pickled and rinsed Zn article is immersed in the coating solution for 2-30 seconds at room temperature to B. pt. The said ions may be incorporated in the final rinse, pickling step, or plating solution.
Patent GB-1466406-A (GB)
Title: Dispensing closure
IPC: B65D47/30
Filed: 1974-11-29
Abstract: 1466406 Child-resistant dispensing closure POLYTOP CORP 29 Nov 1974 51815/74 Heading B8T A spout 14 is mounted on a cap 12 for rotation between a closed position and an open position, where the spout abuts the cap back wall 24 and in which the spout passage 40 is in alignment with the cap opening 38, and the cap includes a bottom wall 44, a side wall 46 and walls 22 which define a slot 47 dimensioned such that the tip 42 of the spout extends into the slot but can only be engaged to rotate the spout to the open position by inserting an implement beneath the tip. A coin 48 can be used as the implement (Fig. 3), or, with different slot dimensions, a pen tip is inserted from one end of the slot. Ridges 20 on a sleeve 18 engage inside a container opening. Alternatively the cap may be integral with the container.
Patent GB-1408795-A (GB)
Title: Track walking gear
IPC: B61J3/08
Filed: 1972-11-09
Abstract: 1408795 Propelling vehicles R B BOLTON 6 Feb 1974 [9 Nov 1972] 51872/72 Headings B7H and B7J In rail holding mechanism for a coal cutting machine, power loader or drilling rig driven along one or more rails by reciprocation of an hydraulic ram, a jamming member 42 pivotally mounted on one side piece 10 of a trapping member slidably fitted over a rail 4 is pivoted to grip the rail between the jamming member and the other side piece 8 in response to sliding movement of a shuttle member 24 which receives the piston rod 8 of the hydraulic ram and is slidably mounted in a receiving member 20 connected to the side pieces 8, 10. When the piston-rod 6 moves in one direction the jamming member locks the holding mechanism to the rail so that the ram advances the machine, subsequent movement of the piston-rod 6 in the other direction releasing the jamming member so that the ram moves the holding mechanism along the rail to a new location. The jamming member 42 is formed with an arcuate serrated jamming surface 48 and a slot 46 which receives a pin 36 carried by a connecting piece 32 projecting from the shuttle member 24 through a slot 22 in the receiving member 20. The shuttle member 24 is slidable in both directions in the receiving member 20, movement being restricted to one direction only according to the required direction of travel by positioning one of stop members 52, 53 between the receiving member 20 and a respective flange 26, 28 on the shuttle member 24, the stop members 52, 53 being movable by means of handles 54 between operative and inoperative positions in which they are releasably held by springs 56, 58. The side piece 8 carries serrated studs for gripping the rail 4 and spring-loaded pads 12 which urge the side piece 10 into contact with the rail. The machine is preferably provided with two rams which are operated alternately to provide a continuous driving force.
Patent GB-1450597-A (GB)
Title: Cathode-ray tube with shadow mask
IPC: H01J29/07
Filed: 1973-11-09
Abstract: 1450597 Making shadow masks RCA CORPORATION 9 Nov 1973 [10 Nov 1972] 52076/73 Heading B3A [Also in Division H1] A cathode-ray tube for colour television has a shadow mask with rows of apertures parallel to the phosphor lines, elongated in the direction of the rows and separated by webs, wherein the apertures are randomly distributed along the rows. The formation of moirÚ patterns is thus avoided. In one form of mask, the webs between the apertures are all of the same length, but the distance between adjacent webs varies in random fashion, between a maximum and a minimun value. There is also a minimum distance between the centre lines of webs in adjacent rows. The pattern may cover the whole area of a mask, or it may form an element which is repeated to form a mask. In the latter case, rows in each element are displaced in random fashion up to a small maximum. The patterns may be generated by a computer, the output of which controls a plotter which produces masters for both sides of a plate which is photoetched to produce the mask. The masters may be of slightly different sizes so that the slot apertures have slanted sides. Also, the slot apertures may be graded on the final master to correct misregistration errors. The finished flat mask is given a curvature. In a second embodiment, the apertures are all of the same length, but the position along the row of corresponding apertures varies in random fashion, within limits similar to those mentioned above, and a mask may comprise a single or several pattern elements. The pattern may be reproduced by photolithography. The pattern may also be constructed by generating a single row and repeating it in random fashion, staggered or displaced with respect to each adjacent row, or by specifying a particular ratio for each web in its random spacing from a vertically adjacent web.
Patent GB-1171390-A (GB)
Title: A Chain Saw
IPC: B23D63/16
Filed: 1967-11-16
Abstract: 1,171,390. Grinding. OMARK INDUSTRIES Inc. 16 Nov., 1967 [18 Nov., 1966], No. 52126/67. Heading B3D. [Also in Division B5] A chain saw comprises a drive shaft 30 for a sprocket 22 movable along the shaft between predetermined limits 50, a saw chain 20 having top sharpenable elements driven by the sprocket, a sharpening member 26 movable by feed means 130 transversely relative to the shaft between an inoperative position and a position engaging the elements, and actuating means 28 having means 132 engaging the sprocket for moving the sprocket back and forth along the shaft to dress the sharpening member by movement of the chain thereacross. The sprocket 22 has disc-like members 40 with teeth 42 therebetween to receive the drive links of the saw chain 20, and is splined for axial movement between spacer rings 50 on the shaft 30 which is driven from a clutch 55. The sprocket is also formed with a flange 58 which is engaged by the means 132 to reciprocate the sprocket. The sharpener has an abrasive member 26 secured to an arm 84 which is mounted on a post 88 mounted in the frame 60 of the machine. The post 88 has a pair of grooves 90, 92 which are selectively engaged by a spring-pressed ball 94 in the arm to position the sharpener in an inoperative position out of the plane of the saw chain and an operative position for engagement with the saw chain. A pin 96 secured to arm 84 is slidable in an L-shaped slot 98 which prevents movement of the arm about post 88 towards the saw chain in the inoperative position and also prevents movement of the arm and abrasive member in a direction axially of the post and shaft 30 in the operative position. The means 132 for moving the sprocket axially to dress the sharpener during a sharpening operation consists of a fork on one arm of the shank 134 of a handle 136 supported by a bush 138 in the cover 66 for the saw chain. A further cranked arm 130 on the handle, upon rotation of the handle presses the abrasive member 26 against the saw chain for a sharpening operation while axial movement of the handle reciprocates the sprocket to dress the abrasive member. The casing is formed with slots adjacent the bush 138 to permit quick detachment of the handle 136 with its arms 130, 132 from the cover. A nut 120 is adjustable by a screw 110 to determine the extent of sharpening. In another embodiment, the movement of the sprocket is effected by the handle 136 and the feed of the abrasive member 26 by the pin 96 or a flexible wire actuator.
Patent GB-1187039-A (GB)
Title: Improvements in or relating to Furniture.
Inventor: JONES DAVID DENISON
IPC: A47B87/00
Filed: 1966-11-23
Abstract: 1,187,039. Shelving. D. D. JONES and A. T. B. JONES. 23 Nov., 1967 [23 Nov., 1966], No. 52419/66. Heading A4B. [Also in Division F2] Shelves 14 are supported between spaced standards 12, 13 on rods 24 with threaded ends 25, 26 each engaged in the threaded through-bore 23 of a fitting 10 with a head 20 and a shank 21 engaged in a selected aperture 22 in the standards 12, 13. The rods 24 seat in grooves 27 in the underside of the shelf 14. Additional shelves 15 or 31 may loosely rest on the head of a bolt 32 screwed into the fitting 10 or on the head 20 of the fitting. The ends of the grooves 27 are recessed, as at 29, to accommodate the head 20 or bolt 32. Each fitting 10 may receive rods 24, 24a engaged in opposite ends.
Patent GB-1529208-A (GB)
Title: Solid state colour anomaloscope
IPC: G02B6/04
Filed: 1975-12-22
Abstract: 1529208 Colour anomaloscopes AMERICAN OPTICAL CORP 22 Dec 1975 [2 Jan 1975]  52455/75 Heading G2J A colour anomaloscope comprises three lightemitting diodes 14, 16a, 16b which provide yellow, red and green luminance respectively together with means for directing the yellow luminance on to one part of a display field 12a and means for directing the red and green luminance on to an adjacent portion of the display field 12b, the luminance of the diodes 16a, 16b being inversely variable with respect to each other, and the luminance of the diode 14 also being controlled. As shown, an optical fibre assembly 20 transmits the light from the diodes to the display screen 12. A viewing system 10, 22 is provided.
Patent GB-1373456-A (GB)
Title: Swimming pool cleaning device
IPC: E04H4/16
Filed: 1972-11-14
Abstract: 1373456 Cleaning swimming pools M R ROSS and R D HENDERSON 14 Nov 1972 [17 Nov 1971] 52538/72 Heading A4F [Also in Division B7]  A floating device particularly for use in cleaning swimming pools comprises a float 14 propelled over the pool surface by a jet from an impeller tube 72 which, together with a rudder 74, is rotatably mounted on the float 14. The arrangement is such that water ejected from the tube 72 tends to rotate the tube 72 with the rudder 74 in one sense, whilst the rudder 74 tends to oppose this rotation to an extent which is dependent upon the speed of the float 14 over the pool surface. When the float 14 becomes trapped and motionless in a corner of the pool, the rudder 74 is less effective and swiveling of the tube 72 results thereby extricating the float 14. The float is provided with flexible tubes 56, 58 which terminate in nozzles 60. Thus when water under pressure is forced therethrough, debris on the pool bottom is randomly agitated thereby facilitating debris removal by a pool filtering system. The floating device may also be used in pond aerators, pond treaters, distributing devices for insecticides, and other chemicals, and in toy ships and amusement devices.