baber/WOPTO huggingface dataset:
Patent GB-806195-A (GB)
Title: Improvements in or relating to the hardening of epoxy resins
Inventor: WRIGHT RAYMOND HAROLD
IPC: C08G59/54
Filed: 1955-08-24
Abstract: Epoxide resins are cured by heating the epoxy resin with a liquid condensation product of an aliphatic polyamine and a saturated aliphatic monocarboxylic acid or corresponding amino acid, containing 2-10 carbon atoms in the molecule, the condensate containing free amino groups and being obtained by mixing the polyamine and acid in proportions of at least one mol. polyamine per mol. acid and heating the mixture to first remove the elements of water and then further under reduced pressure to remove residual polyamine.  Acids specified are acetic, propionic, butyric, valeric, caproic, enanthic, caprylic, pelargonic, capric, 2-ethyl hexoic, amino-caproic; their acid halides or alcoholic esters may also be used; dicarboxylic acids may be present in minor amounts.  2 mols. triethylene tetramine and 1 mol. 2-ethyl hexoic acid were heated to 235 DEG  C. in an atmosphere of nitrogen; a low vacuum was applied and the temperature allowed to fall to 180 DEG  C. during which period a syrupy distillate was removed; distillation was continued under a vacuum of 26 inches, 15 gs. of the residual liquid was mixed with 45 gs. of an epoxy resin and 7 gs. dibutyl phthalate; the mixture set in four days to a tough solid.ALSO:Liquid amides containing free amino radicals are prepared by reacting at least one mol., preferably one to two mols., of an aliphatic polyamine with a C2-10 saturated aliphatic monocarboxylic acid or an amide-forming derivative thereof, e.g. an acid halide or an aliphatic alcohol ester, subjecting the resulting salt to heat treatment to remove the elements of water and to further heat treatment under reduced pressure to remove any residual polyamine. The heat treatment is preferably carried out under nitrogen and the recovered polyamine is recycled for re-use.  The polyamine is such as to furnish liquid reaction products and is exemplified by triethylene tetramine.  The carboxylic acid may be a fatty acid, such as acetic, propionic, butyric, valeric, caproic, enanthic, caprylic, pelargonic and capric acids, a branched-chain acid, such as 2-ethyl-hexoic acid, or an amino acid, such as aminocaproic acid.  Mixtures of the above acids may be employed and the above acids may also contain minor amounts of dicarboxylic acids such as sebacic acid.  In examples triethylene tetramine is condensed with (1) acetic acid; (2) capric acid; and (3) 2-ethyl-hexoic acid.  The Provisional Specification refers to the use of ethylene diamine and diethylene triamine as polyamine reactants and to the use of linoleic acid to form mono- and diamide derivatives.
Patent GB-848827-A (GB)
Title: Improvements in clamping devices for holding down work on machine beds
Inventor: ODONI BRIAN PHILIP
IPC: B25B5/10
Filed: 1958-07-29
Abstract: 848,827. Work-holders. ODONI PRODUCTIONS Ltd. June 12, 1959 [July 29, 1958], No. 24337/58. Class 83 (3). A clamp for holding down work on a machinetable, comprises a member 1 formed by two plates 2 spaced apart by distance-pieces, each plate having a heel 4 and a toe 9 to support the clamp on the machine table 5, and a pivoted arm 12 for engaging the work 17 at 16. A block 7 pivotally mounted between the plates 2, engages a screw 8 held in the T-slots of the table by a washer 11. The arm 12 is pivotally supported on the member 1 and is actuated by a screw 19, connected to a pivotable block 18 by a pin 22 engaging a groove 23 in the screw 19, and screwing in a pivotable block 20 between the plates 2.
Patent GB-908588-A (GB)
Title: Improvements in or relating to door fastening devices
Inventor: JEAVONS PHILIP SWINGEWOOD
IPC: E05B65/20
Filed: 1960-07-13
Abstract: 908,588. Latches. WILMOT-BREEDEN Ltd. July 11, 1961 [July 13, 1960], No. 24363/60. Class 44. A mechanism for preventing a car door from re-opening after it is slammed comprises a contactor 11 placed between the release means e.g. a push button and the latch means, the contator comprising a first part 14 pivoted at 15 on a second part 12 pivotally mounted on the back plate 10. A spring 16 urges the contactor to a fastening position in which abutments constituted by a portion 19 and a flange 20 on the parts 12, 14 respectively engage and a projection 23 on the part 14 engages a stop 24 on the back plate. When the push button is operated the part 14 pivots about 15 so that the projection 23 is moved away from the stop 24 and a portion 25 of the part 14 is brought into engagement with a lug 21 on the part 12. The contactor as a whole is then moved about 13 causing a roller 26 carried by the part 12 to engage a cam plate 27 which turns a cam 28 to release the latch means. If the door is slammed, however; the contactor is prevented from moving into the release position by the engagement of the projection 23 with the stop 24, this movement being further prevented by the engagement of a projection 35 on the part 12 with a locking slide 31 movable by means of a key or sill control. A remote control lever 37 whereby the latch means may be released from inside the vehicle and a safety means rendering the lever 37 inoperative are also provided.
Patent GB-854793-A (GB)
Title: Means for applying weed-killing or other liquid to lawns while mowing same
IPC: A01D43/14
Filed: 1958-07-29
Abstract: 854,793. Lawn mowers. USMAR, G. R. July 29, 1959 [July 29, 1958], No. 24391/58. Addition to 810,830. Class 6(2). A liquid distributing unit 1 as claimed in the parent Specification is provided with a supporting roller 5 or wheels and is arranged to be towed by a mower. As shown a pair of arms 12 are hooked over the mower cross-bar 15 and locked in position by means of adjustable clamping pieces 17.
Patent GB-1247639-A (GB)
Title: Improvements in or relating to the manufacture of popcorn
IPC: A23L1/18
Filed: 1970-05-20
Abstract: 1,247,639. Pop corn. I. GRUNEWALDKIRSTEIN [trading as PINGUIN POPCORN INGEBORG KIRSTEIN]. 20 May, 1970 [9 Dec., 1969], No. 24408/70. Heading A2B. Popcorn having a sugar or caramel containing coating is prepared by popping the corn in the presence of the coating material in a single step process wherein at least one half of the coating material consists of sugar or syrup. The coating may additionally contain fat or oil, flavourings, and colourings.
Patent GB-504019-A (GB)
Title: Advertising or display apparatus
IPC: G09F13/12
Filed: 1937-09-08
Abstract: 504,019. Changing signs. CHATFIELD, A., and SWIFT, O: P. Sept. 8, 1937, No. 24462. [Class 3(i)] In changing display devices in which an inclined translucent mirror reveals in turn an object disposed behind, seen directly, and an object in front of the mirror, seen by reflection the objects are illuminated with gradually increasing and gradually decreasing intensity. The means for effecting this comprises a rotary switch consisting of a disc 29 provided with contacts 33 and a conducting concentric annulus. The contacts 33 are joined together through resistances 34 which are carried by formers extending from the disc 29 to a lower ring 37, the disc and ring being held together by bolts and being rotated by an electric &c. motor 31. One of the contacts 33 is electrically joined to the annulus by a strip and a gap in the resistances is formed at the contacts 33 on the opposite side. The lid 11 of the switch box carries three spring buttons 43, 44, 45 which engage respectively contacts 33, the annulus and opposite contacts 33 when the lid is closed. Current is led to the annulus and reaches the two illuminating lamps of the sign by way respectively of a gradually increasing and a gradually diminishing number of resistances 33 as the disc turns. The upper portion of the rear surface of the inclined mirror is blackened or silvered to conceal the lamp which illuminates the back chamber.
Patent GB-683249-A (GB)
Title: Improvements in or relating to piezo-electric crystal units
IPC: H03H9/05
Filed: 1950-10-06
Abstract: 683,249. Piezo-electric crystals. GENERAL ELECTRIC, Ltd., and JACKSON, E. Sept. 13, 1951 [Oct. 6, 1950], No. 24477/50. Class 40 (viii). In a piezo-electric crystal having the crystal supported by wires attached to its electrode coatings, and also having stop means to prevent the crystal moving excessively in any direction, at least those of the stop means that prevent excessive movement in the directions of the length and width of the crystal, are adjustable during assembly of the unit. In the construction shown in Fig. 1, the crystal 7 is supported by lead wires 8 connected to rods 5 and 6 forming a framework. Excessive motion along the length of the crystal is prevented by end-plates 1 and 4 adjustably secured on rods 5 and 6. Motion in the thickness direction is restricted by passing the crystal through slots 9 in plates 2 and 3. Motion in the width direction is restricted by a pair of swivelling members 10 on each plate 2 and 3. When adjusted, members 10 may be fixed in position by a varnish. In a modification shown in Fig. 2 members 10 are replaced by plates 12, which are slid on rods 5 and 6, after they have been cut down to the desired size to give a desired restraint to motion in the width plane.
Patent GB-740856-A (GB)
Title: Improvements in or relating to circuits for synchronizing sawtooth oscillators
IPC: H04N5/12
Filed: 1953-09-04
Abstract: 740,856. Automatic frequency-control systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 4, 1953 [Sept. 8, 1952], No. 24507/53. Class 38 (4). A saw-tooth oscillator 3 having a cosine shaped fly-back (in voltage or current waveform) is synchronized with incoming pulses 1 by differentiating the output, e.g. by a series capacitance and resistance circuit 5, or where the output is the current in a television receiver magnetic deflection coil by taking the voltage across the coil to give the output waveform of Fig. 3 with sine-shaped flyback, then differen. tiating the waveform of Fig. 3 to give that of Fig. 4 in which the output is zero before and after the flyback period t1-t2 and cosineshaped during the flyback. The resultant output is then applied with the incoming pulses to a phase comparison circuit 2 controlling the oscillator frequency. The final differentiated output may be taken, at least in part, from a voltage-dependent resistor to increase the slope of the cosine-shaped flyback.
Patent GB-598879-A (GB)
Title: Improvements in or relating to rotary wing aircraft
IPC: B64C27/82
Filed: 1945-09-21
Abstract: 598,879. Rotarywing aircraft. FAIREY AVIATION CO., Ltd., and BENNETT, J. A. J. Sept. 21, 1945, No. 24536. [Class 4] In a rotary-wing aircraft having a, power-driven rotor and a forward propeller, the latter being located at this side of the fuselage so that the rotor torque reaction is balanced by the moment of the propeller thrust, the plane of the rotor is inclinable so that by inclining it backwardly the forward thrust of the propeller may be balanced to achieve zero forward speed and by decreasing this backward inclination translational speed may be achieved, and the rotor is arranged for variation of its collective pitch automatically with variation in rotor power as in Specification 598,878. The rotor plane may also be inclined for pitching and rolling control. The rotor pitch is normally within the autorotative range, and the disc loading is sufficiently low that the aircraft has a low sinking speed at steep angles of glide. The pitch of the propeller is adjustable for controlling and/or trimming the aircraft in yaw. As shown in Figs. 1 and 2, the blades b of the rotor are mounted as in Specification 598,878 by drag links c on a rotor head d so that their pitch varies automatically with the rotor power. A power unit f is coupled to the propeller e through gearing g and a shaft h, and to the rotor through a 'one-way clutch j and a shaft k. A control lever m, universally mounted in the cockpit, is connected by a link o with one arm of a bellcrank lever p, the other arm of which is connected by a vertical rod q with the rotor head d for tilting the latter about a transverse axis when the lever is moved in a fore-and-aft direction. The lever m is also connected by a laterally extending link r (see Fig. 3, not shown) and a bell-crank lever s with a rod t which is coupled to a bell-crank lever u and rod v for tilting the rotor head about a fore-and-aft axis when' the lever is moved laterally. A pedaloperated bar w is connected eccentrically with a link x which is connected through a bellcrank lever z, link 12 and bell-crank lever 13 with a transversely extending link 15 (see Fig. 5, not shown) actuating the pitch-control mechanism of the propeller e.
Patent GB-604151-A (GB)
Title: Stabilized silver halide emulsions
IPC: G03C1/34
Filed: 1945-09-21
Abstract: 604,151. Photographic silver halide emulsions containing anti-fogging substances. GENERAL ANILINE & FILM CORPORATION. Sept. 21, 1945, No. 24539. Convention date, Sept. 16, 1944. [Class 98 (ii)] A silver halide emulsion contains an antifogging mixture consisting of a mixture of a sulphinic or seleninic acid or salt thereof with a polythionic acid or salt thereof of the formula MOSO2-Sn-SO2OM (wherein M is an alkali metal or H and n is 1 to 4) or with a thioanhydride of a sulphonic acid of the formula RSO2-Sn-SO2R (wherein R is an organic radical and n is 1 to 4). Compounds such as sodium trithionate and tetrathionate, potassium pentathionate and hexathionate, and dibenzenesulphonyl mono-, di-, tri-, and tetra-sulphide may be used. The compounds may be produced in a solution of the sulphinate or seleninate by reaction of added colloidal sulphur or nascent sulphur or selenium (produced by catalytic decomposition of a suitable labile sulphur or selenium compound which has been added to the solution) with some of the sulphinate or seleninate. The decomposition may be catalysed with a salt of arsenic, tin, or antimony, e.g. sodium arsenite. Sodium arsenite or a mixture of arsenic and tin salts may be added to technical sulphinates or seleninates to oxidise impurities such as thiosulphates or sodium phenylthiosulphuric acid ester to polythionates. Potassium ferricyanide may also be used as oxidising agent. Examples are given of the addition to gelatin silver halide emulsions of mixtures of (a) sodium benzenesulphinate and potassium pentathionate ; (b) sodium benzeneseleninate and sodium tetrathionate ; (c) of sodium benzenesulphinate and sodium arsenite; (d) of sodium benzenesulphinate and potassium ferricyanide ; (e) of sodium benzenesulphinate and colloidal sulphur; (f) of sodium benzenesulphinate and dibenzenesulphonyl mono-, di-, tri-, or tetrasulphide ; and (g) sodium benzenesulphinate and sodium trithionate. Sodium ethanesulphinate, chlorobenzenesulphinate, toluene-psulphinate, naphthalenesulphinate, hexahydrobenzenesulphinate, or thiophenesulphinate may also be used. Specification 441,625 is referred to.
Patent GB-155673-A (GB)
Title: Improvements in four-stroke internal combustion engines of the sleeve-valve type for automobiles and aircraft
IPC: F01L5/06
Filed: 1919-10-10
Abstract: 155,673. Archer, F. B., (Roux, L.). Oct. 10, 1919. Valves.-A single reciprocating sleeve C, without ports, controls a port B in the cylinder for admitting scavenging-air, and a common exhaust and mixture-inlet port A, which is connected to the exhaust and inlet pipes in turn by a slide valve (not shown). The sleeve C and the slide valves of two cylinders side by side are worked by rods D, H from a half-speed shaft G. The scavenging-air is supplied by a fan N through ports K, L in the hollow end J of the valve shaft, and through passages 0, P leading to the cylinders.
Patent GB-505751-A (GB)
Title: Improvements in or relating to cathode ray tubes
IPC: H01J29/52
Filed: 1937-09-13
Abstract: 505,751. Cathode-ray tubes. NICOLL, F. H., and MAYO, B. J. Sept. 13, 1937, No. 24837. [Class 39 (i)] In cathode-ray tubes having within the tube envelope in the order named a cathode 1, an apertured cathode screen 2 close to the cathode, a first accelerating electrode 4, a decelerating or constricting electrode 5 at or near cathode potential and a second accelerating electrode or first anode 7 and also having means, such as a second anode 10 or a coil, for finally focusing the electrons on to the fluorescent or other screen of the tube, the distance between the electrodes 1 and 4 is made as great as 3-5 times, preferably 4 times, the diameter of the aperture in the electrode 2. A cross-over point C of the electron beam is thus formed between the electrodes 1 and 4, and a second cross-over point D is formed as an image of the point C, near the cathode end of the electrode 7 or between this electrode and the electrode 5. The spot on the screen is an image of the second cross-over D and its size varies only to a small extent as the intensity of the electron beam is modulated by the electrode 2 or 5. The distance between the points C, D may be 3-20 times the diameter of the aperture in the electrode 2. Dimensions and voltages are specified, and the variation in size of the spot on the screen is compared with the corresponding variation in the hexode tube de. scribed in Specification 431,327. When the modulating potentials are applied to the electrode 2, potentials varying in definite phase relation thereto may be applied to the electrode 5 to increase its constricting effect on the electron beam as the beam current increases. In . a modification, the tubular portion of the electrode 5 beyond its diaphragm 6 in the direction of the anode 7 is omitted, and the anode 7 is close to the diaphragm 6 and has a part of enlarged diameter near the anode 10. Specification 470,004 also is referred to.
Patent GB-518390-A (GB)
Title: Improvements in and relating to thermionic valve amplifiers
IPC: H03F1/16
Filed: 1938-08-23
Abstract: 518,390. Valve amplifying circuits. MACLARTY, B. N. Aug. 23, 1938, No. 24839. [Class 40 (v)] In a screen-grid or pentode amplifier feed-back means are provided to feed into the control grid circuit a voltage to compensate for the voltage set up on the screen grid due to the inherent reactance of its associated circuit and the input is applied between the control and screen grids. The Figure shows an arrangement in which the input connection to the screen grid includes the condenser 11. Potentials on the screen grid are fed back by condenser 11 and grid resistance 12 to the control grid in anti-phase and appropriate magnitude may be obtained by choice of the impedances 11, 12. Potentials set up on the cathode may, in addition, be compensated by a further condenser between the junction of the impedances 11, 12 and the cathode, Fig. 2 (not shown).
Patent GB-193445-A (GB)
Title: A new transposing arrangement applicable to harmoniums, organs and pianos
IPC: G10B1/00
Filed: 1921-09-20
Abstract: 193,445. Suarez, M. D. Sept. 20, 1921. Organ and pianoforte transposing keyboards; organ manual actions; reed organs.-In a transposing-keyboard for pianofortes, organs or harmoniums, of the kind which slides over secondary keys such as 3 operating the sounding-means, the playing keys 1 depressing the secondarv keys by means of vertical rods 2, the playing keys 1 are arranged in rows one behind the other, as shown. The keyboard may be divided into two sections for right and left hands as described in Specification 153,444, the parts sliding separately on runways 6. When the notes sounded bv the left hand keyboard section ascend in pitch from right to left, as described in that Specification, the range of secondary keys corresponding to each section, together with their sounding-means, is increased to enable the transposition to be made by each section.
Patent GB-647159-A (GB)
Title: Improvements in or relating to a lifting surface and method of designing same
IPC: B64C3/14
Filed: 1947-09-11
Abstract: 647,159. Aerofoils. GARBELL, M. A. Sept. 11, 1947, No. 24956. Convention date, Sept. 16, 1946. [A Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 17, 1948.] [Class 4] An aerofoil comprises at least three spanwise control sections, the section with the smallest mean-line camber being at the root, while the camber and thickness ratio of the intermediate sections vary from those obtained by straight-line fairing between the root and tip, the camber of one or more of the intermediate sections exceeding that of the tip section. The purpose of the construction is to improve the stalling characteristics of the aerofoil, detailed particulars of the method employed to determine the location of the intermediate control sections (which is similar to that described in Specification 643,580) being given in the Specification. The curve 6, Fig. 4, represents the variation of lift coefficient throughout the span, the lines 17-18 and 17-19 being tangents to the curve at the root section and the section 7 at which the lift coefficient is a maximum. The optimum spanwise locations of the intermediate control sections are stated to be in the vicinity of the section 7 and that corresponding to the point 17 at which the tangents intersect.
Patent GB-185963-A (GB)
Title: Pencil
IPC: B43K21/02
Filed: 1921-09-21
Abstract: 185,963. Lindberg, J. F. Sept. 21, 1921. Pencil-holders.-In a pencil-holder of the type comprising a follower-rod movable longitudinally within the casing to project a rod of lead or other marking-material, the follower-rod is operated by means of two clutches, one automatically released and manually operated from the exterior of the casing to engage and feed forward the follower-rod and the other manually released and automatically operated to prevent material return movement of the rod. Ring clutches controlled by springs and operating-rods may be used, the second clutch being preferably released by cam or screw means. In the form shown in Figs. 1 and 5, the lead 5 is supported in a tube 4 in the lower part 2 of the casing, the part 2 screwing into the upper part 1 of the casing. The follower-rod 6, extending within the tube 4 and engaging the upper end of the lead 5, is fed forward by two ring clutches 7, 12 surrounding the rod 6 and held in a clutch-carrier 16 formed from sheet metal and slidably arranged within the part 1. The ring 7 is normally held by a spring 9 against an abutment 8 on the carrier 16 and out of engagement with the rod 6, and is tilted to engage the rod 6 and then projected to feed forward the rod 6 by means of a rod 11 manually projected by mechanism at the upper end of the part 1. On the return of the rod 11 to its normal position under the action of the spring 9 and the consequent disengagement of the clutch 7 from the rod 6, material return movement of the rod 6 is prevented by the clutch 12 normally held in engagement with the rod 6 by the tilting-action of a spring 13 and a rod 15. The rod 11 projects through an aperture in a stop 18 in the part 1 and is operated by rotating a member 20 mounted on the stop 18 and provided with a cam 21 bearing on the upper end of the rod 11, the cam 21 preferably being such that the rod 11 is projected once for each half revolution of member 20. The clutch 12 is released by slightly unscrewing the part 2 from the part 1, when a spring 19 acting between the stop 18 and the upper end 17 of the carrier 16 moves the carrier 16 relatively to the part 1 so as to maintain the lower end 14 of the carrier 16 against the upper end of the part 2, the spring 13 then pressing the clutch 12 against an abutment 10 on the carrier 16 and out of engagement with the rod 6. The upper part of the member 20 may carry a rubber eraser 23. In a modification, the rod 11, Fig. 7, is projected by depression of a spring- pressed plunger 23.