baber/WOPTO huggingface dataset:
Patent GB-977817-A (GB)
Title: Improvements in or relating to apparatus for severing a continuous web of material to divide it into discrete sheets
Inventor: ASTON DAVID
IPC: B26D5/20
Filed: 1962-01-22
Abstract: 977,817. Cutting webs. UNITED KING- DOM ATOMIC ENERGY AUTHORITY. Jan. 17, 1963 [Jan. 22, 1962], No. 2330/62. Heading B4B. [Also in Division B6] A continuous strip 1 of compacted metal powder fed by rollers 2 down a shoot 3 having a fixed part 4 and a pivoted part 5 is cut into sheets when a transverse cutting edge 9 at the delivery end of the part 5 is moved periodically at right angles to the feed direction, by means of lips 15 at each side of each of a series of trays 14 carried by a moving belt 12 engaging wedges 8 attached to the sides of the part 5, so as to co-operate with the cutting edge 11 of a cutter 10. After the lips have cleared the wedges, the part 5 returns to its normal position and each cut sheet is carried away in a tray 14. The part 5 is bridged at its lower end by a guard 7. The speed of the belt 12 is greater than that of the strip 1 and variation of the speed differential varies the length of the sheets cut off. The cutter 10 may, as shown, be fixed or be a rotary cutting wheel rotatable about an axis parallel to the feed direction, the cutting edge 9 then co-operating with the side of the cutting wheel.
Patent GB-509718-A (GB)
Title: A new or improved method of and means for measuring and indicating irregularities in the diameters of tubes, cylinders and the like
IPC: G01B5/08
Filed: 1938-01-25
Abstract: 509,718. Linear-dimension gauges. WATTS, J. Jan. 25, 1938, No. 2353. [Class 106 (ii)] A gauge in which variations from standard dimensions are given a multiplied indication by the use of a liquid column comprises a pair of cylinders of different diameter and connected by a rigid tube, the cylinder of larger diameter being provided with a piston carrying a finger adapted to contact with the work; and the cylinder of smaller diameter being provided with a spring plunger carrying a pointer, liquid filling the cylinders and connecting tube. Figs. 1, 2 show a form for measuring the internal diameter of tubes. A spider 3 having three radially arranged and equidistantly spaced arms 4 5, 6 is secured to a tube 1. The arms 5, 6 are immovable and may have balls or rollers on their outer ends. The third arm takes the form of a cylinder in which works a plunger 4a. On the outer end of the tube 1 is carried a cylinder 7 having a plunger 8 the outer end of which contacts a spring 9. A second cylinder 14 may be carried adjacent the cylinder 7 and communicating therewith in which works a piston 15 adjustable by means of a screw 16. The interior of the spider, the tube 1 and cylinder 14 contain an incompressible liquid 2 which is introduced through a filling hole 18 which is then closed by a screw cap 17. In use, the spider is introduced into the tube and moved along the latter variations from the standard diameter being indicated by movement of index 10 to one side or other of the zero of a scale 11. In a modification a cylinder is mounted in one leg of a calliper gauge the plunger forming an anvil. This cylinder communicates by a pipe with another cylinder carried by the body of the gauge and having protruding therefrom a rod carrying an index moving over a scale. The other anvil is formed by an adjustable screw. A similar apparatus for measuring work in progress may be carried by the bed of a lathe, the cylinder having rack teeth by which it may be moved on turning a pinion so that the plunger engages the work. Alternatively the device may be mounted on the tool rest. In a final form, Fig. 5, the cylinder 3d is mounted to slide on a master straight edge 29 above a surface 31 to be gauged. The plunger 4f carries a roller 4g engaging the work 31 which is clamped at 30, 30. The cylinder communicates by a pipe la with a second cylinder 1c in which slides a rod plunger which protrudes and carries an index 10a moving over a scale 11a.
Patent GB-696534-A (GB)
Title: Improvements relating to the moulding of thermosetting and/or thermoplastic materials
IPC: B29C43/00
Filed: 1950-07-21
Abstract: 696,534. Press-moulding plastic material. A.C.I. PLASTICS PROPRIETARY, Ltd. July 21, 1950 [July 25, 1949]. No. 2360/52. Divided out of 696,487. Class 87 (ii). Thermoplastic or thermosetting material is press-moulded into article form, and then the mould is vented substantially simultaneously on both sides of the article to obviate substantial deformation of the article by unbalanced pressure. Fig. 3 shows a two-part mould 10, 11, with which has co-operated a pressing plunger 12 to form a screw-threaded container M. In the pressing position 11 fits inside 10 and 12 fits inside 11. The plunger has a cylindrical end 12<SP>1</SP> and a tapered middle portion having in its surface grooves 15 for the escape of gases. The mould parts are carried by heated bolsters 13, 14. To remove the moulded container the plunger is raised and simultaneously the mould part 10 is lowered, then the mould part 11, with the container therein, is moved laterally. The simultaneous raising of the plunger and lowering of the mould part 10 simultaneously vents the mould on both sides of the container. Excessive penetration of thermoplastic material into grooves 12 may be prevented by providing a cool zone in plunger 12. For making a jar closure the plunger tapers to the end Fig. 4 (not shown). Fig. 15 shows a machine for making articles comprising a table 16 which carries two diametrically opposed mould parts 11. The table is oscillated through 180 degrees and back by a hydraulic cylinder 20 and rack and pinion 18, 19, to present the mould parts alternately to plunger 12 and mould part 10, whereby the article is made, and to revolving plunger 36 and revolving platen 41, whereby the article is unscrewed from part 11. From the position shown, simultaneously the four hydraulically-operated working elements move, plungers 12 and 36 descending and mould part 10 and platen 41 ascending;plunger 36 is rotated by worm gearing 40. Then all four elements return simultaneously to the position shown. When the article has been unscrewed it rests on platen 41, whence it is discharged into a shoot. Specifications 696,487 and 696,488 are referred to.
Patent GB-1156487-A (GB)
Title: Sulphur-Containing Flavouring Agents
Inventor: WINTER M
IPC: A23L27/20
Filed: 1966-05-02
Abstract: 1,156,487. Mercaptals. R. FIRMENICH, G. FIRMENICH, R. E. FIRMENICH, and F. H. FIRMENICH, [trading as FIRMENICH & CIE.]. 2 May, 1966 [30 April, 1965; 18 April, 1966], No. 2388/69. Heading C2C. [Also in Division A2] Dimethylmercaptal of α-methylbutanal was prepared as follows: Dry HCl was introduced into a mixture of 0À05 mole-α-methylbutanal and 0À11 mole methanthiol. By cooling the temperature was maintained between 0‹ and 5‹ C. After 15 minutes 50 ml. of water were added, the mixture extracted with ether, the ether layer washed with a NaHCO 3  solution and water. By distillation of the ether concentrate 4À2 g. of dimethylmercaptal of α- methylbutanal were obtained; b.p. 75-76‹ C./ 8 Torr. n D <SP>24</SP> = 1À5050; d 4 <SP>24</SP> = 0À9761.
Patent GB-661965-A (GB)
Title: Improvements in or relating to contact-retarding mechanism in electric switchgear
IPC: H01H7/08
Filed: 1949-01-28
Abstract: 661,965. Retarding action of switches; heavy-current switches. SWITCHGEAR & EQUIPMENT, Ltd., and SHARPLES, F.A. Jan. 27, 1950. [Jan. 28, 1949] No. 2420/49. Class 38 (v) The end of the opening movement of the horizontally-rotatable contact arm 10 of a double-break, spring-opened isolating switch which is opened or closed by rotation of a shaft 11 through 90 degrees is braked to avoid damage to the switchgear. Movement of the shaft 11 in the opening direction is transmitted to a brake drum 12 through a ratchet drive which connects a ring 13, secured to the shaft by a collar 14, to an outer ring 15 having shoulders 18 engaging studs 17 on the drum 12. Brake shoes 20 engaging the drum with a pressure adjustable by a spring 23, initially rotate with the drum 12 until one of a pair of shoulders 24 abuts a stop 26, whereupon the movement is braked. When the shaft 11 is reversely rotated to close the switch, the ratchet is ineffective and there is no braking action, but to ensure return of the shoes 20 to their original position, the drum 12 is axially loaded by a light spring 27 bearing on a flange 29 of the collar 14 through a friction ring 28, whereby the brake assembly rotates with the shaft.
Patent GB-1412495-A (GB)
Title: Flame guard
IPC: F23N5/24
Filed: 1973-01-18
Abstract: 1412495 Flame sensors ELESTA AG ELEKTRONIK 18 Jan 1973 [26 Jan 1972] 2632/73 Heading F4T A flame sensor for a burner provides for an initial external luminosity test at a higher sensitivity than is used for flame sensing during operation, the sensor including a voltage operated switch S, and resistors R2, R3 and the coil RV 1  of a motor or solenoid operated fuel valve connected together or a voltage divider across the supply rails Ph, O, the junction of resistors R2 and R3 being connected to a light detector F and to switch S and the junction of resistor R3 and coil RV 1  being connected to a contact tr1, operated by an electrically heated actuator TR, to provide for a first and a second mode of operation when contact tr1 is open and closed respectively, the voltage developed at the junction of R2 and R3 in the first mode in response to any signal from the light detector being sufficient to operate switch S and prevent the burner from operating should detector F provide a signal before actuator TR heats sufficiently to close contact tr1, and the voltage developed at said junction in the second mode being sufficient to operate switch S only when the burner is producing a flame. On closure of a thermostat Th, a burner motor M, the heater TR and an igniter ZT are energized and if detector F senses that ambient luminosity is below a predetermined level a relay R of switch S remains initially de-energized, and heater TR subsequently closes contacts tr1 to energize fuel valve RV1 and place the circuit in its second mode, and also releases a member (33), Fig. 4 (not shown), initially blocking operation of a contact al by relay R. If a flame is produced, photoresistor detector F causes ignition of a cold cathode tube Ro thereby energizing relay R which then opens a contact a2 and changes over contact al to de-energize heater TR and maintain the valve open, igniter ZT remaining energized via al, trl until TR cools to move contact trl back to a terminal 49 which may be used to energize a further fuel valve for two-stage operation; contact al is also effective in this state to maintain the circuit in the second mode with R3 in parallel with R2. If the flame goes out, relay R drops out and a new start-up cycle, including ambient light sensing, is initiated. If during any startup the ambient luminosity is such that relay R is immediately energized, contact a2 opens whereby igniter ZT is de-energized and valve RV1 is not energized, but, since in this condition member (33) prevents relay R from operating contact al, heater TR is energized to operate contacts (tr2), Fig. 4, to effect shut-down. Contacts (tr2) also cause shut-down if ignition is not effected within a predetermined period following opening of valve RV1.
Patent GB-524863-A (GB)
Title: Improvements in or relating to cigarette papers for filter-tip cigarettes
Filed: 1939-02-09
Abstract: 524,863. Cigarettes. ESCOTT, J. Feb. 9, 1939, No. 2673. [Class 130] A cigarette paper for filter-tip cigarettes has a patch c of gum for adhering to the filter tip, in addition to a gummed edge d. The corner b of the paper may be cut to form an inclined curved or other notch.
Patent GB-1246166-A (GB)
Title: An attenuator
Inventor: WATKISS JOHN EDWIN ROBERT
IPC: G01R15/14
Filed: 1969-01-16
Abstract: 1,246,166. Attenuators. THORN RADIO VALVES & TUBES Ltd. 30 Jan., 1970 [16 Jan., 1969], No. 2695/69. Heading H1S. [Also in Divisions H3 and H4] An attenuator (for use as a probe) comprises a first resistor or resistor combination 10, 11, 12 (Fig. 4) connected in series with a second resistor or resistor combination 14, 16 across a pair of input terminals, two output terminals being connected to the ends of the second resistor or resistor combination 14, 16 which latter is a hollow generally tubular member surrounding at least the major part of the first resistor combination. In Fig. 4, 20 indicates the probe input and 21 the output terminal of the probe which in use may be connected to an oscilloscope through a coaxial cable 23. The outer resistor combination is formed of a synthetic resin bonded paper tube 15 having 11 bands 14 of copper foil connected together through 10 k # resistors 16. A trimming capacitor 24 may be provided to compensate for the effect of stray capacitance. Further compensation may be provided by shunting the two resistors 16 at the earthed end of tube 15 by a 6À8 k# resistor. The space between the resistors 10, 11, 12 and the tube 15 may be filled with silicone jelly. In another embodiment (Fig. 6) the first resistor 30 is formed of a hollow tubular member of uniform resistance along its length and is connected at its end remote from the input terminal 31 to a similar hollow tubular resistor 33 which surrounds it. Both may be surrounded by an earthed screen 34 and a central wire 35 is connected to the input terminal 31 and through a variable capacitor 36 to output terminal 32 to compensate for stray capacitance between 33 and screen 34. The wire 35 may be fed from the input through a 500: 1 capacity potentiometer.
Patent GB-901457-A (GB)
Title: Improvements in or relating to transistor d.c. amplifiers
Inventor: ISAACS ANTHONY LEONARD
IPC: H03F3/45
Filed: 1958-01-27
Abstract: 901,457. Transistor amplifier circuits. FERGUSON RADIO CORPORATION Ltd. Jan. 27, 1959 [Jan. 27, 1958], No. 2709/58. Class 40 (6). A push-pull transistor D.C. amplifier comprises a first adjustable potentiometer connected between two like electrodes of respective transistors to apply relatively adjustable proportions of a temperature independent voltage thereto and a second adjustable potentiometer connected to apply relatively adjustable proportions of a temperature-dependent potential to the electrodes, means being provided for varying one of the potentials. The amplifier shown in Fig. 1 has input terminals TI 1  and TI 2 , and output terminals TP 1  and TO 2 . The emitters are connected together so that with no input circuit connected to the terminals the bases are at substantially the same potential. Resistor VR3 may therefore be adjusted at a first temperature such that the base potentials are made equal to the potential applied to the tap on potentiometer VR1 and the transistor currents are accordingly independent of the setting of this potentiometer. Potentiometer VR2 is now adjusted to balance the collector currents or to provide a required amount of unbalance. The common emitter potential of the transistors is applied to a difference type amplifier A so that small changes of emitter current with changes in temperature provide relatively large changes at the output of the amplifier A. Accordingly at a second temperature a different potential is applied to the tap on VR1 and this potentiometer may be adjusted to provide a desired degree of balance without changing the balance conditions at the first temperature. When the input terminals are connected to a low impedance source the two balancing potentiometers may be connected to the emitters (Fig. 2, not shown) and when the input circuit may be of either high or low impedance, potentiometers may be connected in both base and emitter circuits (Fig. 3, not shown). Either or both the temperaturedependent potentials may alternatively be derived externally of the amplifier.
Patent GB-1026797-A (GB)
Title: Coating shaped articles of alkenyl aromatic resins
Inventor: PARK WILLIAM ROB ROY
IPC: C08J7/052
Filed: 1964-01-22
Abstract: A barrier, non blocking, and/or heat sealable coating is produced on a shaped article e.g. a film, sheet, moulding extrusion or section of a rigid or semi-rigid nature, of any size, shape or thickness of an oriented alkenyl aromatic resin, by applying to a hydrophyllic surface of the article a continuous coating consisting of or containing an aqueous dispersion of a copolymer of (a) from 40 to 60% by weight of a monovinyl aromatic hydrocarbon compound having from 8 to 10 carbon atoms and wherein the vinyl group is attached directly to the benzene ring e.g. styrene, vinyltoluene, vinylxylene, and vinylethyl benzene, (b) from 35 to 50% by weight of an alkyl acrylate containing up to 14 carbon atoms in the alkyl group, or a mixture of such alkyl acrylates, and (c) from 0.25 to 10% by weight of acrylic, methacrylic or itaconic acid, or a mixture thereof, drying the coating, applying over the dried coating a second coating of an aqueous dispersion of a film forming vinylidene chloride copolymer, and drying the second coating.  "Alkenyl aromatic resin" is defined as being a polymer which may have an essentially linear molecular configuration or be in a cross-linked form and which contains at least 50% by weight of at least one polymerized alkenyl aromatic compound or monomer of general formula Ar-Cr = CH2 wherein R is hydrogen or methyl, and Ar is an aromatic radical, advantageously of the benzene series, of from 8 to 10 carbon atoms (including the carbon atoms in any ring substituents on the aromatic nucleus), e.g. thermoplastic polymers and copolymers of styrene, polymers and copolymers of x-methyl styrene, vinyltoluene, mono- or dichlorostyrenes and ar-dimethylstyrenes, including copolymers thereof with such materials as vinylidene chloride and acrylonitrile; and graft copolymers thereof with other polymeric substances such as other elastomeric polymers.  The surface of the article may be rendered hydrophyllic by surface sulphonation of chlorination, corona discharge or flame treatment.  The first aqueous copolymer coating may be dried at a temperature of from about 50 DEG C. to below the deorientatism temperature of the oriented alkenyl aromatic resin shaped article.  The film forming vinylidene chloride copolymer may contain at least 70% by weight of vinylidene chloride with, for example, acrylonitrile, vinyl chloride and alkyl acrylate. The coatings may be applied by brushing, spraying, roller coating, dipping or other means.  Excess coating may be removed by means of a doctor blade, squeeze rolls, air knife or doctor.
Patent GB-1481574-A (GB)
Title: Textile coating with polyurethanes
IPC: C08G18/65
Filed: 1975-01-22
Abstract: 1481574 Transfer coating with polyurethanes BAYER AG 22 Jan 1975 [22 Jan 1974] 2777/ 75 Heading B2E [Also in Divisions B5 and C3] A process for coating a textile sheet with a polyurethane by a transfer coating process in which, in a first stage, a solution of a polyurethane which is substantially free from reactive end groups is applied as top coat to a release substrate and the top coat is dried and, in a second stage, a bonding coat solution is applied to the top coat, the textile sheet is backed onto it, the solvent on the bonding coat is evaporated off on a second drying operation and the coated textile is then lifted from the release substrate, in which process the top coat is used as a polyurethane which has been prepared by reacting (a) at least one dihydroxy compound e.g. a dihydroxypolyether or a dihydroxypolyester, with a molecular weight of between 600 and 4000, (b) at least one diisocyanate and (c) a mixture of two diols each with a molecular weight between 62 and 450, at least two of which diols are each present in a quantity of more than 5 mole %, based on the mixture of diols, the molar ratio of the compounds (a) and (c) being between 1:1 and 1:5. Many suitable reactants for forming the polyurethane are listed. The bonding coat may be identical with the top coat; alternatively, a polyurethane made with the aid of a single diol or a two-component polyurethane system may be used. The release material may be a release paper.
Patent GB-554148-A (GB)
Title: Improvements relating to gear cutting machines and the like
IPC: B23F5/20
Filed: 1942-03-03
Abstract: 554,148. Gear cutting. ASQUITH, Ltd., W., and JOHNSON, A. March 3, 1942, No. 2789. [Class 83 (iii)] A gear cutting or other machines wherein the work is mounted on a table or like support which is driven by worm gearing, has the table-driving worm connected to an auxiliary electric motor rotated idly during the cutting operation, means being provided to disconnect the normal drive and the feed drive and to run the auxiliary motor to rotate the table quickly while the concentricity of the work is checked. The table A is mounted on a slide B. A shaft D is normally driven through change gears located at the end d and is connected at d<SP>1</SP> to a worm E<SP>1</SP> operating the feed gears. The worm El is connected through a spring-urged clutch g to a shaft F splined to the tabledriving worm H<SP>1</SP> which is formed in two parts separated by a shim h to take up wear. One part of the worm H<SP>1</SP> is integral with a two-part sleeve H which may be driven from a small auxiliary motor H<SP>3</SP> mounted on the slide. A hand lever j<SP>15</SP> coacting with a locking- plate j<SP>12</SP> may operate a member j<SP>7</SP> carrying a crank-pin which imparts end-movement to a shaft j<SP>1</SP> carrying the boss of a ring J to disengage the clutch g. A lever L operates an interlock switch so that the auxiliary motor can be started by press-button M only after the clutch has been disengaged. The table runs at high speed, for setting the work, as long as the button M is depressed. After setting, the clutch is re-engaged by the lever j<SP>15</SP> and the machine operated in the normal manner.
Patent GB-1194173-A (GB)
Title: Machine Tool with Automatic Tool Changing.
IPC: B23Q1/01
Filed: 1967-06-27
Abstract: 1,194,173. Tool changer. HELLER MASCHINENFABRIK G.m.b.H. GEB. 27 June, 1967 [13 July, 1966], No. 2804/69. Divided out of 1,188,800. Heading B3B. A machine tool comprises a tool magazine 27, a tool changer having two pivotal gripping arms 48, 49, and a horizontal tool spindle 28. The arms 48, 49, are mounted on either side of spindle 28, Figs. 1, 2, and each arm is pivoted about an axis 50 by an hydraulic piston 66 and rack 67, and also about an axis 71 by a pin 68 which co-operates with a cam 69. Each arm also includes a pair of jaws 52, 53, the latter of which is forced into the closed position by a spring 55, and is opened at the required operating positions by a fixed cam 61, and a retractible cam 62. In operation, with arms 48, 49 in the full line positions of Fig. 5, the arms are pivoted about axis 50, and engage tools W1, W2. Arm 48 runs past cam 61, which closes the jaws 52, 53, and clamps workpiece W2. The arm is then pivoted upwardly in Fig. 5 about axis 71 into the dotted line position 48. Jaws 52, 53 on arm 49 are closed on to tool W1 by cam 62, and the arm is pivoted about axis 71 into the full line position 49. Cam 62 is retracted, the arms are pivoted in the reverse direction about axis 71, and they are then pivoted about axis 50. The magazine is indexed, the jaws are opened, tool W1 is replaced in the magazine, and tool W2 is placed in spindle 28.