baber/WOPTO huggingface dataset:
Patent GB-493136-A (GB)
Title: Improvements in or relating to thermionic valve amplifiers
IPC: H03F3/28
Filed: 1937-03-01
Abstract: 493,136. Valve amplifying circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. March 1, 1937, No. 6093. Convention date, Feb. 28, 1936. Drawings to Specification. [Class 40 (v)] In a push-pull amplifier in which the grid bias remains constant and has a value such that the valves are working at the maximum permissible anode dissipation, the load impedance is so chosen that the valves are swung asymmetrically, i.e. the anode current variations resulting from a positive grid voltage half cycle are, at maximum swing, at least twice as large as those resulting from a negative half cycle. A suitable value is between ¢ and “ of the commonly accepted " optimum load " Ra= h.Eb<2>/Ao where h is a constant between À6 and À8, Eb is the steady anode voltage and Ao the maximum allowable anode dissipation. The grid bias source must be independent of the anode current and the impedance of the anode supply must be as low as possible. A pair of valves which give an output of 10 watts with a noise faction of 5 per cent when worked class A factor, give an output of 30 watts and the same noise factor when worked in accordance with the invention. Known methods. as described for example in Specification 407,542, are adopted for compensating for flow of grid current and the impedance of the driver valve must be less than the load impedance of the output stage.
Patent GB-408438-A (GB)
Title: Secret combination switches for the ignition circuits of engines
IPC: B60R25/04
Filed: 1933-03-01
Abstract: 408,438. Secret contact-combination switches. LEE, B., Seaton, Central Road, Drayton, and BEVIS, F. P., Hollywell, London Road, Waterlooville, both in Hampshire. March 1, 1933, No. 6192. Addition to 395,778. [Class 38 (v).] A secret contact-combination switch 15 of the kind claimed in the parent Specification is arranged, together with the leads 16 connecting it to the magneto or 'coil 14, within a housing 17 which is attached to or forms part of the magneto or coil housing to prevent unauthorized persons from diverting the leads. In a modification (Fig. 3 not shown) extra axial conductors are embedded on the drums in connection with the radial conductors so that if one sparking-plug is earthed the plugs connected with adjacent drums are also earthed or an alarm is sounded.
Patent GB-267148-A (GB)
Title: Improvements in and relating to computing weighing machines
IPC: G01G23/22
Filed: 1927-03-05
Abstract: 267,148. Berkel, C. F. M. van. March 5, 1926, [Convention date]. Computing-apparatus. - A computing weighing machine having a device for increasing or decreasing the weighing capacity comprises in combination a computing chart adapted to be movea in two directions and tabularly enumerated according to the different unit prices and weighing capacities, means for moving the computing chart in one direction to change the numerals for a change in unit price and means for mechanically moving the chart in the other direction to change the numerals when the capacity is changed, whereby the computed values at any capacity and at any selected unit price are, directly indicated. The machine may embody any convenient capacitychanging mechanism (not shown) such as that described in Specification 251,947 wherein two loose weights may be added to or removed from the weigh beam individually, in succession, and then collectively or vice versa, by rotating a knob 1, Fig. 1. On the spindle of the knob is a cam arranged to actuate a fork 12 so as to slide a cylindrical computing chart 18 in an axial direction by an amount depending upon the setting of the knob. The computing chart is splined upon a spindle 9 and may be rotated by a knob 20 so as to display the unit price through a rectangular opening 23. The values corresponding to the unit price and to the capacity setting are displayed through openings 24 and the particular value corresponding to the weight of the commodity is indicated by the usual weight-indicating pointer 14. In a modification, Fig. 5, instead of a cylindrical chart a flat chart 25 is used, and the chart is mounted so that it is moved horizontally by a lever 26 and rod 28 when the capacity-changing knob is rotated and may be moved vertically by depressing any one of a series of unit price keys 29. In this manner the requisite value figures are displayed through apertures 24 according to the unit price and the capacity setting, the particular value corresponding to the goods being indicated by the weight-indicating pointer. Instead of automatically changing the computing chart with change of capacity, the chart may be changed independently.
Patent GB-759537-A (GB)
Title: Vertically slidable windows
IPC: B60J1/17
Filed: 1954-03-03
Abstract: 759,537. Holders for sliding windows. WILMOT-BREEDEN, Ltd. May 26, 1955 [March 3, 1954], No. 6207/54. Class 44. [Also in Group X] A vertically sliding window for a vehicle has a hollow member 6 (Fig. 1) secured to the upper edge of the window and containing a pair of coaxial and spring- loaded rods 7 adapted to receive rotational and relative sliding movements, the outer ends of the rods being engageable in spaced recesses 16 in the fixed frame of the window and co-operating with spirally coiled spring strips 17 for balancing the weight of the window. A compression spring 13 is mounted between the inner ends of the rods 7 which are shaped as shown at 8 and 9 in Fig. 3 to allow the rods to be moved axially towards each other by pressing together finger pieces 12 and thereby to release the ends of the rods from recesses 16. The spring strips 17 are secured at one end to the tixed trame of the window and at the other to rollers 18, the rollers 18 having central holes of square section and the rods 7 a part of square section for engagement therein.
Patent GB-963964-A (GB)
Title: Improvements in or relating to the bromination of hecogenin and esters thereof
Inventor: PHILLIPPS GORDON HANLEY
IPC: C07J71/00
Filed: 1963-02-15
Abstract: The invention comprises 11b -bromohecogenin and its acetate, and the preparation of 11b -bromohecogenin and its esters with alkanoic acids containing 2 to 6 carbon atoms by bromination of the 11-unsubstituted compounds with bromine in a solvent consisting essentially of a primary alkanol containing at most 4 carbon atoms and in the presence of a strong acid.  If the process is effected in methanol, esters are methanolysed.  A suitable acid is hydrogen chloride.  Examples are given and dehydrobromination of the products or its acetate, is also described.
Patent GB-1089965-A (GB)
Title: Improvements in or relating to clutches
IPC: F16D41/20
Filed: 1965-02-15
Abstract: 1,089,965. One-way clutches and band brakes. J. M. DODWELL. Feb. 15, 1965, No. 6400/65. Headings F2C and F2E. A one-way clutch or brake has metal bands 20 tapered along their length to frictionally engage the sidewalls of a V-groove in a hub member 13, each band having a bent-over key portion co-operating with a keyway pocket 22 in a housing 10. Each key portion is formed by a smoothly bent-over portion 20b, returned into contact with the body of the band at 20c and returned outwardly to form a projection 20d, and finally returned into contact with the body of the band at 20e. The contacting parts 20c, 20e are brazed or spot-welded to the body. Complementary torque transmitting surfaces 20a, 22a are formed on the key portion and the housing disposed at an angle 0 to the radial to urge the band deeper into the V-groove during operation. In a modification a longitudinal reinforcing rib is provided between the portions 20b, 20d.
Patent GB-313193-A (GB)
Title: Induction current generating apparatus for medical treatment
IPC: A61N1/32
Filed: 1928-03-01
Abstract: 313,193. Noishiki, Y. March 1, 1928. Regulating transformers; commutator switching-arrangements.-A medical coil 34 is supplied with a weak current from battery A through switch plug 4, 3, one coil 19 of an interrupter, coil 34, variable resistance 25, and contact 24 of the interrupter, or with a strong current from battery B through switch 8, both coils 20, 19 of the interrupter and thence as for battery A. A strong output is obtained across terminals 68, 69 and a weak output across terminals 64, 65 selecting either tapping 35 or 36 of the coil by means of a switch 9, 10. The resistance 25 is increased simultaneously with the withdrawal of the core 33 by rack and pinion gear.
Patent GB-1168613-A (GB)
Title: Fuel Supply System for Gas Turbine Engines.
Inventor: LAWRENCE OWEN NAPIER
Filed: 1966-02-15
Abstract: 1,168,613. Gas turbine engine fuel systems. JOSEPH LUCAS (INDUSTRIES) Ltd. Feb. 7, 1967 [Feb.15, 1966], No. 6514/66. Heading F1G. [Also in Division G3] A gas turbine engine fuel system comprises an engine-driven pump, a throttle in the pump delivery line, the position of the throttle being manually controlled to select the engine speed, means for the control of spill of fuel in excess of requirements in response to excessive engine speed increase, and further means for controlling the throttle position in accordance with the spill flow. An engine-driven centrifugal pump 10 delivers fuel through a line 11 under the control of a throttle 12 which is controllable by a pilot's lever 13. If the engine speed increases until it is near its maximum value a governor 27 opens a valve 22 in a line 28 connecting a cylinder 19 to a point upstream of the throttle 12, whereby a piston 20 is moved downwards to open a spill valve 21. The resultant pressure drop across a restrictor 29 in the spill line 18 moves a spring-biased piston 34 to the right whereby the position of the fulcrum of lever 14 is adjusted. The resultant adjustment of the position of throttle 12 restores the speed to the selected value. The movement of piston 34 is damped by a dashpot 35.
Patent GB-235313-A (GB)
Title: Improvements in or relating to means for delivering measured quantities of fluids
IPC: G01F15/00
Filed: 1924-03-13
Abstract: 235,313. Wheatley, A. R., and Beck & Co.. Ltd. March 13, 1924. Liquid - meters.-In means for delivering measured quantities of fluids comprising a meter having a delivery valve A. Fig. 1, which closes automatically when the desired quantity has passed, the valve is opened manually by a lever d, Fig. 2, straightening toggle links a, b, and a pointer h, after being set to the desired position on a scale i, is connected to the meter registering mechanism by a clutch m, m<1> or a pawl and ratchet arrangement. When the pointer returns to zero, it trips the toggle and the valve closes. In order to facilitate successive settings to the same quantity an adjustable stop s is provided. In order to prevent damage if the pointer is moved past the zero position owing to valve leakage, the end of the points is yieldably mounted, and the stop a may turn about a pin y against the action of a spring z.
Patent GB-586962-A (GB)
Title: Improvements in and relating to the patterning mechanism of knitting machines
IPC: D04B11/00
Filed: 1944-04-07
Abstract: 586,962. Knitting-machines. COTTON, Ltd., W., WILDERS, G., and LYNAM, J. E. April 7, 1944, No. 6530. [Class 74 (ii)] Patterning mechanism, particularly for straightbar knitting-machines, comprises at least one patterning device which selectively moves individually movable actuating members between alternative operative positions; associated patterning members which are individually movable to and fro; and power means which effects relative bodily displacement between the sets of actuating and patterning members, causing the actuating members to move the associated patterning members in one direction or the other, according to the position occupied by the actuating members. Actuating members 15 can be rocked selectively about a shaft 16 into one or other of two positions, by means of a drum 34, discs 33a, a chain or the like so that when a lever 17 is rocked counter-clockwise, Fig la, by the main cam shaft to move the members bodily, their fingers 15a or 15b engage noses 10a or 10b of patterning members 10, to rock the members 10 one way or the other about a spindle 11. As they advance, the members 15 are locked in their selected angular positions by fixed blades 24a, or 24b entering slots 23a or 23b in the fingers 15a, 15b. Any members 15 can, while still locked, be selected for a change of angular position, by an associated one of a set of rocking levers 30 pivoted on a shaft 27, each lever possessing a pin 29 which rides between scissor blades 26a, 26b, individually pivoted on the shaft 27; the pin 29 rocks one scissor blade or the other outwardly agains the action of a spring 28 and, on being unlocked, the member 15 is rccked by pressure of the other scissor blade on a pin 25. Each lever 30 is rocked against the action of a spring 31a by the patterning drum 34, through a connection 32a; or by one or more of the patterning discs 33a (which are, in general, used for fashioning); or in both ways. The racking of the discs 33a is itself controlled, through connections 32b, by the drums 34. Each connection 32a or 32b comprises a tubular sheath, with a plunger at each end connected by a closely coiled spring. A known friction device prevents overracking of the drum 34; and back racking is prevented by a ratchet 47. Hand racking is effected by a hand lever 49 and pawl 50. According to the Provisional Specification, the spindle on which the actual members are pivoted is mounted on a slide which is reciprocated in the direction of the length of the members, towards and away from the patterning members, by means of a truck lever operated by a cam on the main camshaft.
Patent GB-712069-A (GB)
Title: Improvements in or relating to methods of and apparatus for cutting woven material or fabric
IPC: B26F1/38
Filed: 1952-03-13
Abstract: 712,069. Cutting thermoplastic webs. GENERAL ELECTRIC CO., Ltd., BRITISH NYLON SPINNERS. Ltd., and LEWIS, D. L. March 11, 1953 [March 13, 1952], No. 6556/52. Class 31 (1) A method of cutting along a desired line or to a desired pattern a plurality of superposed layers of woven material or fabric simultaneously, the material - or fabric (not shown) being made wholly or in part from yarns or filaments of a thermoplastic nature, such as nylon or rayon, comprises cutting with a heated tool 7 and separating the layers one from another at least at the point of cutting during the cutting operation. The layers of material to be - cut may be separated by layers of tissue paper and pressed on to the base 1 of a hand-guided device by a spring 15 which is carried by a post 3 mounted in a recess 2 in the base. The tool 7 may be a piece of wire electrically heated and tensioned between the limbs 8, 9 of a slide 10 which may be reciprocated on the post 3 by a rod 11 driven from an eccentric on the shaft of an electric motor 5. A separating blade 14 is formed on the post 3 and cooled by air blown through a passage 16 in the post by a fan (not shown) on the motor. 1f the tool is not reciprocated and air-cooling is required, it may be effected by a separate flexible air line to the post 3. A magazine or spool may be provided on the tool to hold a supply of cutting wire, and means may also be provided for controlling the temperature of' the wire.
Patent GB-984620-A (GB)
Title: Ignition of gas burners
Inventor: HUGHES FRANCIS
IPC: F23Q9/12
Filed: 1963-02-19
Abstract: 984,620. Electric igniters. SIDNEY FLAVEL & CO. Ltd. Feb. 17, 1964 [Feb. 19, 1963; Oct. 3, 1963], Nos. 6577/63 and 38910/63. Heading F4F. An igniter 5 for a gas burner 24, Fig. 2, in which a flame is lit by an electric filament, is fed with gas through a thermally controlled valve 6 actuated by a bi-metallic strip 12 which is heated by a pilot flame from burner 13 lit by the flame of igniter 5 so that when the pilot flame is alight strip 12 closes valve 6 so cutting- off the supply of gas to igniter 5 and causing a pressure-responsive switch 8 to cut the current supply to the igniter filament. A main valve 14 incorporates an auxiliary burner 15 having a nozzle 16, the gas from which being ignited by the pilot flame from burner 13 to produce a flame playing on a bi-metallic strip 17 which when heated opens valve 14 to supply gas to burner 24. In operation, a tap 20 supplies gas to valve 14 and to valve 6 from which it flows to igniter 5 via pressure switch 8 which energizes the filament to light the igniter and then the pilot burner 13 which subsequently causes closure of valve 6. Auxiliary burner 15 is supplied with gas after a predetermined time via time valve 22, the gas being lit from the pilot burner to heat strips 17 to open valve 14 and supply gas via ports 18, 23 to burner 24. Valve 22 can be by-passed by rotating a valve 25 if desired. If time-control is not provided gas can be supplied to burner 15 and the igniter system via line 63. The control valve, Fig. 4, has a member 41 held against a seat 44 by a spring 62 and a spindle 38 biased upwardly toward a bi-metallic strip 26 by a spring 49 acting on collar 48. Opening of a tap supplies gas to port 52 and it passes via passages 56, 57, 58, 59 to a diaphragm switch, attached to valve body 30, and an igniter and via passage 55 to pilot burner 27. The igniter lights the pilot flame which causes strip 26 to press on spindle 38 which, through spring 49, moves member 41 away from seat 44 to supply gas via chambers &c. 35, 54, 53 to a main burner. Member 41 engages seat 45 to cut-off gas supply to the igniter whose electric filament is de-energized. Member 41 re-engages seat 44 when the gas supply to port 52 ceases.
Patent GB-661231-A (GB)
Title: Improvements in or relating to shuttles for looms
IPC: D03J5/00
Filed: 1949-03-10
Abstract: 661,231. Shuttles for automatic looms. BRITISH CELANESE, Ltd. March 10, 1949 [March 11, 1948], No. 6588/49. Class 142(iii) A shuttle 3, for an automatic loom having an electrical weft feeler including a pair of plungers 9 for operating the changing mechanism, is provided with guard means in the form of flat springs 11 which are pressed against the yarn by brass tips 10 on the plungers.
Patent GB-105991-A (GB)
Title: Improvements in Stands for Cycles.
Inventor: SANDOZ GEORGE DAVID
IPC: B62H3/00
Filed: 1916-05-10
Abstract: 105,991. Sandoz, G. D. May 10, 1916. Stands for cycles, of the folding-tripod type, have two legs c. d, pivoted to a base a and coupled to each other, and a strut b, pivotally connected to the leg coupling and detachably connected to the base; the leg d is cranked at k to supp o r t the bottom bracket and curved at i to accommodate the seat tube of the cycle frame, the other leg c being extended and curved at j to support the bottom tube. The detachable connexion between the strut and the base consists of a nose or extension f engaging with a perforated lug g. The base may be fitted with three rollers or wheels.
Patent GB-127648-A (GB)
Title: Improvements in or relating to Aircraft Gun Mountings.
Inventor: DAWSON ARTHUR TREVOR
IPC: B64D7/02
Filed: 1917-05-10
Abstract: 127,648. Dawson, Sir A. T., and Buckham, Sir G. T. May 10, 1917. Mountings for use on aircraft.-Consists in the combination of (1) a fixed ring A supported at a substantial distance above the framework F of an aircraft, (2) a carriage rotatably mounted on the fixed ring and composed of two longitudinal girders B resting at both end on the upper surface of the ring and provided with clips B<1> which, by contact with the ring, prevent the carriage from lifting when the gun is fired, and (3) a gunner's seat b<2> suspended from the carriage and situated between the ring and its supporting-framework. The carriage is trained by means of spur and worm gears c<4>, c<2> and hand-wheel C; and the gun is elevated by means of a sector D through a worm pinion and bevel-gear worked by a handwheel D'.
Patent GB-491794-A (GB)
Title: Improvements in or relating to load resistances or the like for high frequency alternating currents
IPC: H03H7/38
Filed: 1937-03-06
Abstract: 491,794. Electric resonators. PAWSEY, J. L., and CORK, E. C. March 6, 1937, No. 6686. [Class 40 (iii)] An artificial load with small reactance and constant resistance for simulating an aerial in the testing of short-wave transmitters consists of one or more pairs of copper or like conductors such as 10, 12 and 11, 13, the space between them being filled with a flowing liquid, such as water, which dissipates heat and maintains a constant temperature. A single pair of conductors may be used, Fig. 1 (not shown), of sufficient length to simulate an infinite transmission line, and this impedance is approximately independent of frequency if the conductivity of the water is not too great. Or two pairs of conductors, one 10, 12 short-circuited and the other 11, 13 open-circuited at the far end, may be connected in parallel as shown or in series. The impedance at 14, 15, is of constant magnitude, though its phase angle is more variable over a wide range of conductivity of the water if the length of the conductors is an odd multiple of #/16 where # is the wave-length. If this length is any multiple of #/8, the impedance at 14, 15 is resistive but depends on the conductivity of the water. A purely resistive line can be made by increasing the resistance R of the conductors until R/G=L/C in the usual formula for the characteristic impedance of the line. The inner conductor may be coiled, Fig. 3 (not shown), or made of iron wire. Or the leakage conductance G may be increased by providing the inner conductor with fins, Fig. 4 (not shown). For a balanced transmitter a pair of inner conductors immersed in fluid in a common earthed outer conductor may be used.