baber/WOPTO huggingface dataset:
Patent GB-789785-A (GB)
Title: Improved inking device for printing machines
IPC: B41L13/18
Filed: 1956-04-20
Abstract: 789,785. Inking-mechanism. ROTO-WERKE AKT.-GES. April 20, 1956 [April 23, 1955], No. 12241/56. Addition to 787,262. Class 100(2) In the inking-mechanism of a stencil duplicator or other printing machine wherein ink is supplied to an inking roller 3 through a nozzle 53 from a container 5 under substantially constant pressure using a volatile liquid propellant as in the parent Specification, a mechanical power accumulator driven by the machine drive is released at predetermined intervals and in the course of this release acts on a valve 48 which controls the supply of ink to the nozzle. As shown the part 28a, Fig. 1, of the coupling device 28a, 31 (see the Group XXIX abridgment of the parent Specification) is formed on a valve stem 45 which, when the container is fitted, lifts a valve disc 46a from its seat 46c, against a spring 46b, to allow ink to pass through an aperture 45a to a chamber 46 and thence by a pipe 47 to the valve 48, the spring-loaded plunger 49 of which may be pressed from its seat by a rod 51. The power accumulator for operating the valve 48 comprises a spiral spring, 71, Fig. 1, anchored between its casing 69 and a ratchet wheel 66. the wheel 66, checked by a back pawl 77, is driven by a pawl 65a on a vertically reciprocating rod 65, while the casing 69 is held stationary by a boss 69a abutting against a stop 76a on an arm 76; a cam 67a on the wheel 66 ultimately meets a dog 76b on the arm 76, withdraws the stop 76a and the spring rotates the casing 69 and with it two or more cams 74a, 74b which cause a follower lever 75 to depress the rod 51, the speed of the casing 69 being limited by brake vanes 78, Fig. 1, pivoted at 79 and connected by gearing 70 to the casing. The rod 65 is coupled to a lever 63 pivoted at 61 and operated by a pin 62 on a bellcrank lever 60 oscillated by the main shaft 56 of the machine through a cam disc 57 and follower roller 58 on a slotted link 59; a shoulder 65b contacts a stop pin 80 which may be set by a hand lever 81 to positions defined by a spring-loaded stop 82 and toothed slot 81a to vary the stroke of the rod 65 from zero to a maximum, and thus to vary the time between each actuation of the valve 48. The duration of each actuation is varied by altering the relative positions of the cams 74a, 74b coupled by a screw 74d and slot 74c. or by replacing them by other cams. A lever 83 allows additional manual operation of the valve 48. Failure of pressure in the chamber 46, Fig. 1, when the container 5 is empty may be used to stop the machine or the sheet feed, or to give a visible or audible signal; Fig. 4 shows a piston 90 forced upwards by the ink pressure admitted through an aperture 88a, and spring-lowered to retract a rod 91 from a roller 94 which then swings to open a control switch to close a signal switch, or to bring a differently marked part of a plate on its lever 96 before a window 99.
Patent GB-776896-A (GB)
Title: Improvements in or relating to operator's telephone headsets
Inventor: ROBERTSON JAMES SAMUEL PATERSO
IPC: H04M1/05
Filed: 1955-04-29
Abstract: 776,896. Horns. STANDARD TELEPHONES & CABLES, Ltd. April 29, 1955, No. 12509/55. Class 13. [Also in Group XXXIX] In an operator's set wherein the transmitter is carried on a head-band and an acoustic transmission path is provided between the mouth and the transmitter, the path includes a detachable and rotatable horn carried by the transmitter casing. Transmitter 1 and receiver 2, Fig. 2, are mounted side by side in a casing 3 and are secured by a strap 4 and screws 23, 26. The transmitter is seated on a cushion on ledges 29, 30, the latter of which is formed on the outer part of acoustic tubing 31. A hole 32 in tube 31 provides an acoustic coupling to the microphone and a sound-tight joint is ensured by a washer 58 of polyvinylchloride. A nylon horn 9 is connected to the base 3 by a connecting piece 11 on which it is a push fit and an angle piece 12, the pieces 11 and 12 being secured and aligned as far as the acoustic duct is concerned by a helical spring which lies within the duct and is secured at its ends to a cap 40 and a washer 41. The ends 45 and 59 of connecting piece 11 and elbow 12 are shaped to form a ball and socket joint and the connections are made acoustically sound by polythene washers 48 and 60. The bearing surface of elbow 12 against the duct 31 in casing 3 is shaped as at 42 to take up either of two diametrically opposed positions and a fin 43 engaging the casing prevents damage to the spring by restricting rotation. The casing is attached to the head-band by a socket 53 on a V-shaped spring 51 which holds a ball 8 on the end of the head-band on another socket on the inside of cover 5. The ball is passed through a rectangular aperture which is made dust-proof by a piece of material 55. Strain on the wires is prevented by a cord 56.
Patent GB-877280-A (GB)
Title: Improvements in or relating to ammunition chargers
Inventor: CURRAN JAMES
IPC: F41A9/84
Filed: 1959-04-14
Abstract: 877,280. Ammunition charges. FRENCH & SONS Ltd., THOMAS. April 11, 1960 [April 14, 1959], No. 12555/59. Class 9(1). A charger for smallarms magazines comprising a channel-shaped pressing 10 of spring steel is provided with cartridge holding tongues 12a formed by making slits 11 inwardly from each corner, the slits being symmetrical and inclined at an included angle of about 40 degrees. At their inner ends the distance between the slits is about one third the width of the base. Specification 770,128 is referred to.
Patent GB-1088481-A (GB)
Title: Improvements in electronic circuits having variable gain or attenuation
IPC: H03G1/00
Filed: 1965-03-24
Abstract: 1,088,481. Transistor gain control circuits. COMPAGNIE FRANCAISE THOMSON-HOUSTON. March 24, 1965 [March 27, 1964], No. 12562/65. Headings H3R and H3T. A gain control circuit comprises a pair of transistors T1, T2 with their emitters connected together and to earth via a path Zoo of infinite impedance at signal frequency, a control voltage V being applied between the bases of the two transistors and a bias network R3, R4 connected to the base of the first, T2. The signal is fed to the base of the second transistor T1, the base of the first being earthed via an impedance, i.e. capacitor C 22 , of low value for signal frequency; each collector is connected to an H.T. supply via a load resistor R, the output being derived from one or other of the collectors. To avoid distortion when one of the transistors is biased near cut-off, a pair of such circuits may be used (Figs. 5, 6, not shown), the second transistors in each being driven in push-pull by the signal and the collectors being suitably cross-connected in pairs. The common emitter impedance Zoo may comprise a further transistor (Fig. 7, not shown), while the bias networks may include temperature-sensitive resistors to provide temperature compensation (Fig. 8, not shown). It is stated in the Specification that the arrangement may be used as a modulator or for the purpose of frequency changing.
Patent GB-869589-A (GB)
Title: Fuel injection system for internal combustion engines
Inventor: POWELL ROBERT JAMES
IPC: F02M37/20
Filed: 1959-04-15
Abstract: 869,589. Fuel injection systems. CONTINENTAL MOTORS CORPORATION. April 15, 1959, No. 12767/59. Class 7(6). A fuel injection system for an internal-combustion engine having an air induction manifold 18 and an adjustable air throttle valve 19 associated with the manifold for varying engine speed comprises a source of supply of fuel 10, a fuel pressure pump assembly 14 adapted to be driven by the engine and having an intake connected to the fuel supply source a delivery outlet 28 and a fuel metering valve structure 15 having an inlet connected to the delivery outlet and a regulatable fuel discharge outlet connectable to the engine, a metering valve means operatively connectable to the throttle valve to vary the opening of the fuel discharge outlet in response to operation of the throttle valve, and a fuel pressure relief valve 58 associated with the delivery outlet of the pump and constructed and arranged normally to maintain a substantially uniform maximum fuel pump delivery pressure irrespective of variations in fuel pump intake pressure, a restricted orifice of fixed predetermined size being provided in advance of the relief valve to restrict increased flow of fuel to the valve on an increase of fuel pump delivery while opening of the fuel discharge outlet remains substantially constant the relief valve including valve means operable by the sum effect on the means of atmospheric pressure and valve closing spring means opposed by the pump intake pressure and also when the valve is closed by the pressure of the pump delivery fluid at the inlet to the relief valve such that the pump intake pressure in the relief valve and hence the pump delivery pressure are maintained substantially constant. The relief valve may comprise a valve housing structure having an inlet in communication with the restricted orifice and an outlet in communication with the intake of the fuel pump and valve means in the housing and normally operable to maintain the maximum pump delivery pressure the valve means having a pressure responsive element connected between the valve outlet and atmosphere and operable to nullify the effect of pump intake pressure or pump delivery pressure. The vapour separator 55 is in essence a chamber in which the fuel from the conduit 26 and a conduit 59a is whirled before discharging into the passage leading to the intake 56a of the pump 56. The vapour separator is the subject of Specification 855,755 which is referred to.
Patent GB-539843-A (GB)
Title: Improvements in and relating to contact breaker levers for ignition apparatus
Filed: 1940-08-12
Abstract: 539,843. Articles made of synthetic resin. BRITISH THOMSON-HOUSTON CO., Ltd., and COE., R. T. Aug. 12, 1940, No. 12889. [Class 2 (iii)] [Also in Group XXXVII] A contact-breaker lever arm 1 for ignition apparatus is made from a laminated bonded fabric formed by winding a sheet of fabric into a flat role, the arm being cut from the bonded sheet so that the folds lie at the end 3 of the arm to which the contact is secured. The fabric is bonded with synthetic resin.
Patent GB-721876-A (GB)
Title: Phosphate fertilisers and a process for their preparation
IPC: C05B13/02
Filed: 1951-05-31
Abstract: <PICT:0721876/III/1> A fertilizer essentially comprising calcium phosphate is produced by melting a phosphate, and quenching and granulating the molten mass so that the resulting particles have to an extent of 95 per cent by weight a size of 0.05-1 mm. and a greater energy content that silico-carnotite.  (The expression "greater energy content than silico-carnotite" is explained.)  The particles have a vitreous structure.  If larger grains are produced they are broken down; the 5 per cent by weight smaller than 0.05 mm. may be left in the product.  The higher the ratio P2O5:other acids (SiO2, B2O3, Al2O3 &c.) in the product, the smaller should be the particles. Chilling may be effected with water or steam, except that in this case, the vitreous form is obtained only when there are present with the phosphates equivalent or even larger quantities of metasilicates, borates, aluminates, &c.  Irrespective of the proportions of these substances present, chilling may be effected with air or other gas in the absence of water or steam; or by contact with cool surfaces e.g. water cooled metal sheets.  Fig. 2 shows a device for granulating the molten phosphate, air under pressure being supplied via tubes 6, 7 annulus 5 and radial distribution tubes 8 to an annular slot 11.  In another construction, air is supplied tangentially to an annular chamber communicating directly with the annular slot surrounding the nozzle.  The surface of the molten phosphate, e.g. Thomas slag, to be quenched may be enlarged with an inflating or foaming agent, e.g. coal tar, &c.  Thus, tar or other gas-evolving substance may be spread on the surface of the metal sheets; or air charged with coke dust is used to blow the slag out of the converter, or is directed against the slag flowing therefrom.  Atomized oil may alternatively be used.  In most instances, other than in the case of Thomas slag, the phosphates are melted in shaft furnaces, which may be fired under oxidizing conditions by oil or gas burners.  When coke is used, producing reducing conditions, loss of phosphorus is minimized by adding iron, iron ore, or a phosphate rich in iron, or by melting the raw phosphate with blast furnace slag, or other vitrifying additives, e.g. magnesia-containing minerals and slags, aluminates, borates, silicates, alkali metal compounds and fluorides.
Patent GB-853321-A (GB)
Title: Improvements in or relating to vinyl chloride polymer compositions
Inventor: BARTON ERIC EDGAR
IPC: C08J9/06
Filed: 1958-04-24
Abstract: A foamable extrudable composition is obtained by mixing a blowing composition, prepared by compounding below 130 DEG C. a vinyl chloride polymer and a blowing agent, with an elastomer based on a vinyl chloride polymer which has previously been compounded at above 130 DEG C.  The vinyl polymer is obtained by polymerizing vinyl chloride alone or with a minor proportion of a copolymerizable monomer e.g., vinyl acetate.  Plasticizers, stabilizers and pigments may be present.ALSO:A foamable extrudable composition is obtained by mixing a blowing composition, prepared by compounding below 130 DEG C. a vinyl chloride polymer and a blowing agent, with an elastomer based on a vinyl chloride polymer which has been previously compounded at above 130 DEG C.  The vinyl polymer is obtained by polymerizing vinyl chloride alone or with a mixed proportion of a copolymerizable monomer, e.g. vinyl acetate.  Plasticizers, stabilizers and pigments may be present.  Blowing agents specified are azo-di iso butyronitrile, benzene sulphonylhydrazide and p1p1-oxybis (benzene sulphonyl hydrazide).
Patent GB-184266-A (GB)
Title: Improved liquid fuel vaporiser device for internal combustion engines
IPC: F02M1/00
Filed: 1921-05-07
Abstract: 184,266. Keith & Blackman Co., Ltd., J., Keith, G., and Whatmough, W. A. May 7, 1921. Vaporizers, external.-A vaporizer for fuels of high boiling-point comprises a container into which exhaust gases ane admitted at A, whence they pass beneath a plate B across a series of pins C on a metal plate E and out again at D. The plate E has a solid portion F dipping into the liquid fuel and provided with a number of vertical saw-cuts across which a bore G is made communicating by a pipe H with the vapour outlet controlled by a stop-valve J. A cup K enveloped by lagging surrounds the solid portion F and has an extension K<1> filled with granular metal or metal cuttings &c. separated from the portion F by wire gauze L. Fuel is fed from a float chamber N through a pipe O<1> and hollow plug M provided with fine sawcuts. A pipe O connects the float chamber and the vapour outlet to prevent liquid fuel from being raised above the normal level in the vaporizer when the engine suction is high. The supply-valve q to the float chamber is directly actuated and closes upwards, and is so proportioned that an excess of pressure in the vaporizer overcomes the lift of the float and the fuel is driven out of contact with the heated elements. The extension K<1> is not lagged. The exhaust gases may enter below the plate B and pass through holes therein to heat the upper part of the container. The vaporizer is intended for use with the means for controlling the supply of mixture to internal-combustion engines described in Specification 127,998.
Patent GB-480838-A (GB)
Title: An improved washing apparatus for washing windows, shop fronts, carriages and such like
IPC: A47L1/08
Filed: 1937-10-19
Abstract: 480,838. Apparatus for washing windows, shop fronts, carriages, &c. LAWTON, J. W. Oct. 19, 1937, No. 13081. [A Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 9, 1937.] [Class 19] A frame F adapted to receive a detachable slide S carrying a brush, mop, sponge or other implement, is formed with a hollow perforated portion Z for the projection of water or other liquid on to the surface being cleaned. The liquid is supplied through a tube T which is connected to a pail or tank and is provided with a bulb B associated with an inlet valve and an outlet valve, so that liquid can be drawn up the tube and forced out through the perforations P. A curved strip W prevents the tube T from kinking. The Specification as open to inspection under Sect. 91 comprises also an arrangement employing a plunger instead of a bulb for forcing up liquid. This subject-matter does not appear in the Specification as accepted.
Patent GB-199217-A (GB)
Title: Improvements relating to boxes for eggs and the like
IPC: B65D85/32
Filed: 1922-05-09
Abstract: 199,217. Cooke, J. D. E. Travis-. May 9, 1922. Packing eggs.-Eggs or other fragile articles are held between a pair of shallow perforated trays D, E, over the bottoms of which are stretched sheets H of felt or other resilient material, the sheets being slit across the apertures in the trays to form seatings for the eggs &c. The trays, which may be placed within a box A, are held apart by strips L of felt secured to a framework N of cardboard &c.
Patent GB-611641-A (GB)
Title: Improvements in or relating to equipment stands
IPC: A61G15/16
Filed: 1946-04-30
Abstract: 611,641. Dental stands. RITTER CO., Inc. April 30, 1946, No. 13099. Convention date, May 5, 1945. [Class 81(ii)] A dental equipment stand, substantially the same as that set out in Specification 608,264, is provided with one or more germicidal lamps, e.g. ultra-violet vapour arc type, for automatically sterilizing the instruments in retracted position after use. The lamps 68 and 69 are fitted in the end walls of bays 71 which have inner reflecting surfaces as may also the other walls of casing 15. Means for energizing the lamps comprises two spring actuated switches 73, and 74 mounted on a bracket 72 fixed to casing 15. Between the switches passes a bar 77 having cam projections 78 and 79 and a small cam 80 at opposite ends, the bar being fixed to a movable carriage 33. In operation, depression of a press button 81 closes a circuit (Fig. 4) through a motor 66 and starts the advance of carriage 33 which moves cams 78 and 79 out of engagement with switches 73 and 74 and allows switch 73 to close the motor cicuit around the button 81, which is then released. Advance of the carriage brings the instruments into operating position, when cam 80 contacts switch 73 and opens the motor circuit and carriage 33 and instruments are retracted, full retraction bringing cam 78 into contact with switch 73 which opens the motor circuit. Simultaneously cam 79 contacts switch 74 which closes the lamp circuit to sterilize the instruments.
Patent GB-1074586-A (GB)
Title: Improvements in or relating to saw-tooth wave generator circuit arrangements
Inventor: HOULDCROFT DAVID
IPC: H03K6/00
Filed: 1963-04-03
Abstract: 1,074,586. Sawtooth circuits. MARCONI INSTRUMENTS Ltd. March 9, 1964 [April 3, 1963], No. 13136/63. Heading H3P. In a sawtooth wave generator the flyback 'period is reduced by the use of a plurality of component sawtooth generators switched in turn to a common output circuit so that successive sweeps are provided by different component generators. As shown in Fig. 3, the outputs from a pair of sawtooth generators A, B are switched in turn by gates D, E to an output terminal OUT so that the effective flyback time is no greater than the time required to switch from A to B. As described, the negative-going sweep from A is terminated when its output voltage reaches the D.C. voltage at the slider of potentiometer G3 so that a negative pulse is derived from the anode of valve G1 which changes the state of a bi-stable circuit F which, in turn initiates operation of sawtooth generator B and reverses the transmission states of gates D, E, thus transferring the output terminal OUT from source A to source B. The sweep from B is terminated by a further comparator H in a. similar manner. Alternatively, both sweeps may be controlled by a single comparator, or sweeps from A, B may be initiated from a common pulse source, alternate pulses of which being steered to the appropriate component sawtooth generators as in Fig. 2 (not shown). Fig. 1 (not shown) relates to a circuit in which the component generators are respectively controlled by antiphased outputs from a symmetrical astable multivibrator, the comparators being omitted.
Patent GB-345541-A (GB)
Title: Mouthpieces for ventilation devices
IPC: B63J2/10
Filed: 1930-04-29
Abstract: 345,541. Ventilators. RAPPARD, M., 190, Malakkastraat, The Hague. April 29, 1930, No. 13183. Convention date, April 30, 1929. [Class 137.] In an air-directing mouthpiece of the type comprising a spherical part 5 rotatably mounted within a spherical support 2, the opening 3 of the support is adapted to be directly connected to an opening in the wall of the air inlet pipe. The openings 3 may be closed in any desired manner as by means of a slide 4. An airtight closure between the two ball members may be obtained by covering the ball cup 2 with cloth or similar material. The mouthpiece 5 terminates in a streamline portion 7.
Patent GB-940756-A (GB)
Title: Improvements in or relating to mine shaft guides
IPC: E21D7/02
Filed: 1962-04-05
Abstract: 940,756. Mine shaft guides. GUTEHOFFMUNGSHUTTE STERKRADE A.G. April 5, 1962 [April 11, 1961], No. 13188/62. Heading B8L. The lower end 1 of each section of a guide in a mine shaft is slidably connected to a spreader 4, provided with locating member 3, Fig. 3, which engages within the guide section, and the upper end 5 of each section is secured to a spreader 6. Adjacent guide sections are connected by a member 9 which is rigidly secured within the lower end of the upper section and slidable within the upper end of the lower section and which is formed from three U-section members welded together, Fig. 5. U-section guide members 7 having the same external cross-section as the guide sections are detachably secured to the member 9 by bolts 10 to provide guide surfaces between and aligned with those of the adjacent guide sections.
Patent GB-132001-A (GB)
IPC: B23D17/04
Abstract: 132,001. Gray, C. B. Aug. 22, 1918. Shearing; shear blades. - Machines for cutting sheet metal are fitted with a roller co-operating with a reciprocating cutter and actuated by ratchet variable-speed gearing comprising a cam on the driving-shaft, which rocks a pivoted arm connected to a corresponding arm driving the driven shaft through ratchet and pawl means by a link yieldingly and adjustably connected to the second pivoted arm. The roller also serves to feed the sheet. The reciprocating tool is operated by a shaft F driven by a fly wheel F<1> when a clutch F<2> is engaged. The sheet to be cut is fed intermittently by a roller E<1> on a shaft E carrying a ratchet wheel E<2> co-operating with a pawl E<7> on a lever E<4> oscillated by a link F<17> connected to a lever F<12> periodically lifted by a cam on the shaft F. A spring E<10> adjusted by a turnbuckle E<12> returns the parts E<4>, F<17>, F<12> after each operation. In order to adjust the stroke of the pawl E', and thus the rate of feed, the link F<17> is adjustably connected to the lever E' by pins F<21> projecting on either side of a block carried in the link end and entering slots E<16> on either side of a central slot in the lever. A spring F<23> pressing upwards against a cross-pin F<25> in the link F<17> keeps the pins F<21> normally in position in the slots E<16>, a handle F<26> on the link, and a similar handle on the end of the lever E<4> being provided to enable the pins F<21> to be removed from any slot and placed in any other. Normally, the pawl E' is withheld from engagement with the ratchet wheel E<2> by a mask G<3> on an arm G loose on the shaft E and connected by a link G<4> and lever G<5> to a shaft G<6> which may be rocked. by operation of a pedal G<9> to lower the mask G<3> and allow the pawl to engage the ratchet wheel..