baber/WOPTO huggingface dataset:
Patent GB-1480494-A (GB)
Title: Dental matrix
IPC: A61C5/12
Filed: 1974-07-25
Abstract: 1480494 Dental matrices H J LAZARUS 25 July 1974 [26 July 1973] 32825/74 Heading A5R A dental matrix band comprises a flexible strip 10 having an end portion formed into a loop extending from one end thereof, an intermediate portion of the strip slidably overlying the end portion from the edge of which a finger 44 laterally projects, a notch 42 extending inwardly from the outer end of the finger 44, a member 61 extending through the notch 42 and around the overlying portions of the strip to secure the loop and a coil 36 formed by the other end portion of the strip being provided for tightening the loop about a tooth. In use a winding member (88) of a tool (84) forming the subject of Specification 1480495 (see Division B3) is inserted in the coil 36, which when tightened by the member (88) is disposed adjacent the lock-loop 61, and causes tightening of the loop about a tooth and the lock-loop 61 automatically to secure the overlapping portions of the band against relative movement. The loop-forming end portion 18 of the strip is arcuate and has a notch 40 opposite to the finger 44, the notches receiving the lock-loop 61 which comprises a generally U-shaped member disposed around the overlapping portions of the band, one leg 64 of the member having an extension 78 overlapping the free end of the other leg 62. Three arches 70a, 70b, 72 in the outermost leg 64 define ridges 74 which bites into the band as the coil 36 is tightened. The end 12 of the band forming the coil has tapers 30, 32 in its side edges which define in the opposite ends of the coil 36 a socket for receiving the winding member (88) and a concave recess, respectively. The centre of the coil 36 is formed with a trapezoidal notch 24 which is disposed near the end 12 of the band, the portion of the band adjacent the trapezoidal notch 24 thus forming a strut 34 across the coil core joining portions of the band wound in opposite directions. In use, the member (88) as it rotates bears against an edge 26 at the terminal end of the band to tighten the coil 36. After use of the matrix the lock-loop 61 is released by cutting off the finger 44 and the portions of the lock or loop 61 which overlie it using nippers 118 forming the subject Specification 1480497 (see Division B3) which include a shield for receiving the severed portions. Removal of the matrix is facilitated by insertion of a hook in an aperture 38 in the arcuate portion of the band. The coil 36 is formed on a slotted rotatable spindle within a socket in a block forming the subject of Specification 1480496 (see Division B3).
Patent GB-521223-A (GB)
Title: Improvements in or relating to sheet-fed printing presses
IPC: B65H5/12
Filed: 1938-11-12
Abstract: 521,223. Printing - machines; feeding and delivering sheets. STOBB, A. Nov. 12, 1938, No. 32985. Convention date, Nov. 16, 1937. [Classes 100 (i) and 100 (iii)]  A printing-machine is constructed with means carried by the impression cylinder 14 for separating sheets in succession from a pile 20 preferably carried on a rising support arranged within the frame 11 of the machine, and the sheets are delivered to a table 84 arranged close to the pile table 85 and operated by a common mechanism which raises the table 85 and lowers the table 84 at the same rate. The inking and damping mechanisms 17, 16 are preferably carried in a frame 15 which slides in the frame 11 and can be removed readily to permit of access to the plate or offset cylinders of the machine.. The feed table 85 is connected to one side of a chain 86 operated in unison with the press, and the delivery table 84 to the other side of the chain. The connection in each case is an adjustable one associated with a handwheel 95 which by worm mechanism rotates a sprocket 89 or 90 which connects the tables to the chain 86. The tables are thus adjustable independently. The impression cylinder 14 is formed with an open segment 24, Fig. 5, in which is arranged a suction separator in the form of a pivotally mounted plate 25 formed with a series of suction apertures 36, the plate being integral with a gear 28 which is oscillated by a gear segment 29 on a shaft 31 which oscillated by a stationary cam 34 engaging a roller 33 on an arm secured to the shaft 31. When the plate 25 reaches a position above the front edge of the pile it is moved in a reverse direction to the motion of the cylinder and remains practically stationary relatively to the pile. Owing to the eccentric mounting of the plate 25 it is projected radially of the cylinder so as to contact with the top sheet. Prior to this the top sheet is buckled and registered longitudinally and laterally by means of an inclined roller 65 which is carried by slides reciprocated to and from the pile by cams 71. The front edges of the top sheets are held by projecting feet 77 on a hold-down plate 76 to which are adjustably fixed lateral gauges 80 for side-registering the sheets. Owing to the action of the feet 77 and roller 65 the top sheet is buckled and is then taken by the suction nozzles 36. The pile is also controlled by rear gauges 56 adjustable by means of lever 57, gearing 60, 61 operated by handle 58, and air blasts from nozzles 74 assist separation of the sheet. The pile is controlled by adjustable front gauges 50 and the nozzles 36 are controlled by valves 40 which permit the outside ones to be cut-off when dealing with narrow sheets. After each sheet is separated from the pile it is clamped to the rear edge of the opening 24 by means of grippers41 on a shaft which is geared to the shaft 35, and is arranged so that the grippers clasp the sheet just after the nozzles 36 separate it. The grippers hold the sheet as the nozzles are withdrawn into the cylinder, and finally transfer it to delivery grippers 82.
Patent GB-737108-A (GB)
Title: Improvements in or relating to an electrically heated glass melting furnace
IPC: C03B37/081
Filed: 1952-12-30
Abstract: 737,108. Electric glass furnace. OWENS-CORNING FIBERGLAS CORPORATION. Dec. 30, 1952 [Jan. 4, 1952], No. 33006/52. Class 39 (3). Cullet or raw materials for making glass, e.g. glass marbles, are fed through pipes 11 into a melting chamber in which heat is applied by an upwardly concave cylindrically shaped sheet metal resistance element 31 submerged in the glass and extending almost over the entire horizontal area of the chamber at a level above the bottom thereof. An outlet at the bottom of the chamber is provided with a horizontal metal heating resistance 12 with perforations 13 through which molten glass passes as fibres. The resistances 12, 31 are connected in parallel and current supply to one may be controlled independently by a variable resistance. The rectangular heating resistance 31 is cylindrically curved on an axis parallel to the longer horizontal axis of the rectangular melting chamber and presents a concave surface upwards. The resistance 31 is of base metal, may be imperforate, may have circular perforations or may be slotted as in Fig. 11. The ends of the resistance 31 are spaced slightly from the walls of the chamber, which is assembled from rectangular ceramic blocks 26 in a metal casing 20, the top half 19 of which is readily removable. Tabs 34 on the sides of the resistance 31 are held between ceramic blocks 26, 40 and the ends of the tabs project into slits in rectangular water-cooled metal rods 36 to which current is supplied through bus-bars 42, 43. Current is supplied to the resistances 12, 31 from a transformer and the bath temperature is kept constant by a thermocouple on the bush resistance 12 which connects one of several tappings on the transformer primary to the current source ; or current is supplied to the resistances 12, 31 from separate transformers each controlled by a thermocouple. The bush resistance 12 is of noble metal and has a depressed perforated base 56 with a peripheral flange 53 held between a ceramic plate 42 and a metal plate 57 at the outlet from the melting chamber. The metal plate 57 is cooled by a water pipe 59. The bush 12 has at each end a terminal lug 62 grasped between the bifurcations of a split water-cooled connecting block 63 adjustably connected by a screw 67 to a bracket 64 mounted on a bus-bar 42.
Patent GB-780970-A (GB)
Title: Manufacture of 17--a-hydroxysteroids of the pregnane, allo-pregnane and pregnene series
IPC: C07J5/00
Filed: 1953-11-27
Abstract: The invention comprises 17,20-oxido-allopregnane-ol-3-acetylamine-20-acetate, 17,20-oxido - D 4 - pregnene - one - 3 - acetylamine - 20 and a process for the manufacture of 17a -hydroxy compounds of the pregnane, allopregnane and pregnene series wherein a 20-ketimine of the said series is acylated, the D 17,20 - acylamine - 20 compound obtained is oxidized by means of an organic peracid, and the 17,20 - oxido - acylamine - 20 compound formed is hydrolysed. As starting materials there may be used D 5-pregnene-ol-3-one-20-ketimine, 3-formyloxy - pregnene - 5 - one - 20 ketimine, 3 - acetoxy - pregnane - one - 20 - ketimine, 3 - acetoxy - allopregnane - one - 20 - ketimine, 3,11 - dihydroxypregnene - 5 - one - 20 - ketimine, 3 - acetoxy - 1 - oxopregnene - 5 - one - ketimine, 3,11 - dioxopregnene - 4 - one - 20 - ketimine and also 7- and 12-hydroxy compounds.  As acylating agents there may be used benzoic acid anhydride, acetic anhydride, propionic anhydride, acid chlorides, isopropenyl acetate and ketene.  Oxidation may be effected with perbenzoic acid, perphthalic acid, performic acid, peracetic acid, persuccinic acid or by organic acids with sodium peroxide or barium peroxide.  Hydrolysis may be effected with sodium or potassium hydroxide.  Examples disclose the production of D 17,20-allo-pregnene-ol - 3 - acetylamine - 20 - acetate, 17,20 - oxido-allopregnane - ol - 3 - acetylamine - 20 - acetate, 17a  - hydroxy - allopregnanolone, D 5,17(20)-pregnadiene - ol - 3 - acetylamine - 20 - acetate, D 5,17(20) - pregnadiene - ol - 3 - diacetylamine - 20 - acetate, 5,6 - dibromo - D 17(20) - pregnene - ol - 3 - diacetylamine - 20 acetate, D 5,17(20)-pregnadiene - ol - - acetylamine - 20, D 4,17(20)-pregnadiene - one - 3 - acetylamine - 20, 17,20-oxido - D 4 - pregnene - one - 3 - acetylamine - 20 and 17a -hydroxyprogesterone.  Specifications 465,960, 502,666, [both in Group IV], and 736,409 are referred to.
Patent GB-918785-A (GB)
Title: Improvements in or relating to block and tackle apparatus
IPC: A63B29/02
Filed: 1959-09-29
Abstract: 918,785. Pulley blocks; rope brakes. HALFORD, W. C. J. Sept. 9, 1960 [Sept. 29, 1959], No. 33073/59. Classes 78 (2) and 78 (5). The free end of the rope 3 of a block and tackle leaves the block 1 between the elements of a rope brake which consists of a serrated roller 14 and a serrated cam 13 pivoted to the block at 12. The cam has a tail portion 11 through which the rope is threaded so that the brake may be controlled as shown by movement of the rope itself.
Patent GB-1006809-A (GB)
Title: Improvements in heating elements
IPC: H05B3/34
Filed: 1963-08-21
Abstract: 1,006,809. Electric heating elements. S. J. NOYCE. July 7, 1964 [Aug. 21, 1963], No. 33178/63. Heading H5H. A heating element comprising a coating 2 of conductive silicone rubber applied to a lamina of glass fibre or plastics fabric or film 1 has terminals 3 attached by sewing with either normal or conductive thread or wire 5, 6. The terminals may be covered with an insulating layer secured with the same stitches, or the element may be wrapped round the terminal as shown. The sewing may be such as to form a pocket for the insertion of a stiffener.
Patent GB-862861-A (GB)
Title: Stable liquid oxytetracycline compositions and preparation thereof
IPC: A61K31/65
Filed: 1958-10-17
Abstract: A complex having the formula (oxytetracycline)3- Mg2B2 wherein B is an ammonium or substituted ammonium ion is prepared by treating an aqueous solution of oxytetracycline base with 2/3 mole of magnesium chloride or magnesium gluconate per mole of oxytetracyline, adjusting the pH to about 8,5 to 9,5 with ammonia or an amine and isolating the complex by freeze-drying or by precipitation with a non-solvent for the complex e.g. alcohol or acetone.  The complex (oxytetracycline)3-Mg2H2 may be prepared by dissolving amphoteric oxytetracycline dihydrate in a solution of MgCl2 in methanol and adding the solution dropwise to an aqueous sodium hydroxide solution whilst maintaining the pH at 6,5 to 7,0.  Both complexes may be used in the preparation of injectable compositions (see Group VI).ALSO:A stable injectable composition is prepared by dissolving in an aqueous solution containing from 25-80% by weight of a C1-6 aliphatic carboxamide (e.g. the amide of acetic or lactic acid) from 10 to 100 mg/ml. of oxytetracycline or an acid addition salt thereof, from 0.67 to 1.0 molar equivalents of a soluble, physiologically acceptable magnesium salt (preferably MgCl2) per mol. of oxytetracycline and sufficient ammonia or a physiologically acceptable, water-soluble C1-6 aliphatic amine having a dissociation constant greater than 10-6 to give the composition a pH of about 8.5 to 9.5.  Antioxidants e.g. sodium bisulphite, -metabisulphite or -formaldehyde sulphoxylate may be added.  For intravenous injection the compositions may be made isotonic e.g. with glucose, saline or Ringer's solution and the pH may be adjusted with inorganic bases sodium hydroxide, carbonate or phosphate in place of the ammonia or amine if the oxytetracycline concentration is low (10-25 mg/ml.). Alternatively, the compositions may be prepared by first making the complex (oxytetracycline)3Mg2B2, where B represents the ammonium or substituted ammonium ion or the parent acid thereof (see Group IV (b)), adjusting the pH and dissolving in the amide solution.  Specified amides are N,N-dimethyl- and diethyl-acetamide, acetamide, N-(b -hydroxyethyl)-lactamide. Specified amines are ethanolamine (preferred), mono-, di- and tri-ethylamine, diethanolamine, argonine and glucosamine.  The amphoteric form of oxytetracycline is preferred.
Patent GB-705477-A (GB)
Title: Improvements in or relating to electric pulse-selecting circuits
Inventor: WILLIAMS FREDERIC CALLAND
IPC: G06F1/08
Filed: 1948-12-23
Abstract: 705,477. Thermionic distributers. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Dec. 10, 1949 [Dec. 23, 1948], No. 33192/48. Class 40 (3). [Also in Group XL(c)] A distributer circuit comprises a number of pulse selecting circuits as shown in Fig. 1 in which valve 1 is normally biased to cutoff and in which the incoming train of positive pulses is applied to the suppressor grid at terminal 2. A negative going pulse preceding the pulse it is desired to select is applied to terminal 5 where it is differentiated by network 6a, 6b and the resultant positive going peak is passed by diode 6d to render valve 1 conducting. The screen grid current which flows causes the screen potential to fall and the feed back via capacitor 7 maintains the control grid at approximately cathode potential until the required positive going pulse in the incoming train raises the suppressor grid potential and produces a flow of anode current and an output pulse at terminal 10. Coincident with the trailing edge of the required output pulse a pulse is applied to terminal 9 which is differentiated by network 8a, 8b, 8c, the resultant negative pulse being passed by diode 8d to cut-off valve 1 so that only the desired output pulse is produced at the anode. Fig. 3 shows a number of pulse selecting circuits P1-Pn of the type described with reference to Fig. 1 connected in cascade so that input pulses applied simultaneously to all of the suppressor grid circuits 2'-2n are distributed sequentially to outputs 10<SP>1</SP>-10n. The priming pulse at termnals 5<SP>1</SP>-5n for any given selector is obtained from the output pulse of the preceding selector of terminals 11<SP>1</SP>-11n and the pulse applied at terminals 9'-9n of any given selector to render it con-conducting after it has just produced an output pulse is obtained from the screen grid circuit of the succeeding selector at terminals 4'-4n.
Patent GB-1164398-A (GB)
Title: A Metal Powder Containing Tritium
IPC: H01J9/38
Filed: 1967-07-20
Abstract: 1,164,398. Radioactive material. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 20 July, 1967 [23 July, 1966], No. 33338/67. Heading G6R. A metal powder containing tritium is prepared by contacting finely divided metal powder with tritium without heating, heating the powder in a closed space to release excess tritium which is removed, and then cooling the powder and bringing it into contact with the ambient atmosphere. As shown, a layer 3 of titanium is deposited from helix 2 on to the wall of vessel 1 in an atmosphere of argon. The argon is then removed and tritium is introduced from vessels 19 being rapidly absorbed by the titanium. The layer is heated to 500‹ C., tritium given off being absorbed by a titanium layer in vessel 16. The product does not decompose on heating at 470‹ C. It is removed from vessel 1 as a suspension in a liquid and may be used as radioactive material for stabilizing ignition voltage delays in glow-discharge tubes.
Patent GB-1479116-A (GB)
Title: Musical instrument attenuator network
IPC: G10K15/04
Filed: 1975-08-11
Abstract: 1479116 Electronic musical instruments C G CONN Ltd 11 Aug 1975 [13 Aug 1973] 33391/75 Heading G5J [Also in Division H3] A controlled attenuator for shaping attack and decay envelopes of tones produced in an electronic organ comprises a plurality of differently weighted resistors 15-20 switched into and out of circuit by a reversible counter 40 which is stepped in one sense at a first clock rate during attack following closure of key 38 and in the opposite sense at a second clock rate during decay following release of the key 38. As shown, counter 40 is a 6-bit binary counter and gates 42, 44, 46, 49 provide latching when the counter 40 is full or empty. A ring counter may be used instead of counter 40. The resistors 15-20 may be replaced by series resistors (64-69) Fig. 2 (not shown) shorted out by FETs (74-79) controlled by the counter 40. An attack memory (90) may be connected to the counter 40 to cause it to jump straight to a given number at the start of attack and may also cause non-linear counting during attack.
Patent GB-975290-A (GB)
Title: Mineral oil compositions
Inventor: DRUMMOND ALAN YULE
IPC: C07D295/185
Filed: 1962-08-30
Abstract: An amic acid is prepared by reacting together 3 equivalents of polyisobutenyl (M.W. 800) succinic anhydride with 2 equivalents of N-(2-amino-ethyl) piperazine.ALSO:A mineral oil composition (fuel or lubricant) contains an amic acid obtained by reacting an alkenyl succinic acid or anhydride with a polyamine containing at least two nitrogen atoms separated by at least two carbon atoms. Depending on the relative proportion of the reactants the amic acid may be represented by one of the formulae Q-A Q-A and Q-(A-Q)n where Q is <FORM:0975290/C4-C5/1> and n is 2 or more, R being an alkenyl group having 15-300 carbon atoms and A is the residue of the polyamine, and the carbonyl group in each "Q" being directly attached to a nitrogen atom of A.  The polyamines include cyclic ones, e.g. N-(2-aminoethyl)-piperazine. Fuels mentioned are gasoline, diesel oil and gas oil, and S.A.E. 30 grade oil is exemplified as a lubricating oil.
Patent GB-930776-A (GB)
Title: Improvements in or relating to apparatus for delustering threads of synthetic material
IPC: B65H57/28
Filed: 1961-03-21
Abstract: 930,776. Spinning and finishing yarns. A. J. TLAMICHA. March 21, 1961 [March 25, 1960], No. 33456/62. Divided out of 930,033. Addition to 886,032 as improved upon by 930,033. Drawings to Specification. Class 120 (3). In apparatus for delustring a monofilament of synthetic material of high molecular weight e.g. a polyamide, as described in the parent Specification, the roughening body has a non- cylindrical form providing a peripheral surface of varying diameter e.g. single or double conical frustrum, cylindrical with rising flanks on both sides or of convex or concave curvature, which ensures positive and uniform twisting of the monofilament about its own longitudinal axis as it passes obliquely over the rotating body, Figs. 3-8 (not shown).
Patent GB-1444223-A (GB)
Title: Equipment for prodicing motivated optical images or displays
IPC: G09F19/18
Filed: 1972-07-18
Abstract: 1444223 Moving displays PENNANT DISPLAY & ENG Ltd 17 Oct 1973 [18 July 1972] 33513/72 Heading G5C [Also in Division G2] Apparatus for producing moving MoirÚ fringe patterns in conjunction with a projection or optical display system in which a graticulated film is moved across the optical path of the system, comprises two sheets 12, 16 which are at least partly transparent and carry areas of closely spaced parallel lines 13, which form the fringe patterns, and a diagram 18 respectively. Means such as hinge 17 allows sheet 16 to be displaced relative to sheet 12 and also provides accurate registry of the two sheets when they are superimposed. Each sheet may carry both diagrams and parallel lines, also additional sheets carrying lines and diagrams may be provided. Other methods of registering the sheets include snap fastenings and grooves or channels into which the sheets are slid
Patent GB-1537447-A (GB)
Title: Coolable wall
IPC: F01D5/18
Filed: 1977-08-10
Abstract: 1537447 Turbine blade cooling UNITED TECHNOLOGIES CORP 10 Aug 1977 [11 Aug 1976] 33568/77 Heading F1T A wall element, e.g. forming part of a gas turbine blade Fig. 3 (not shown), comprises a plate 16 having orifices 18 which direct jets of impingement cooling air from a source at pressure P S  across chambers defined between ribs 20 and against a further plate having transpiration cooling orifices 14 exiting to pressure P D , the pressure ratio (P S /P D ) being related to the area ratio (A T /A I ) as shown in Fig. 4, where AT is the total area of the orifices 14 opening from an individual chamber and A I  is the total area of the corresponding orifices 18.