baber/WOPTO huggingface dataset:
Patent GB-697184-A (GB)
Title: Improvements in or relating to electron switches, particularly electromagnetic switches
IPC: H01H51/08
Filed: 1951-02-22
Abstract: 697,184. Electromagnetic switches. PIERCE FOUNDATION, J. B. Feb. 22, 1951 [June 17, 1950], No. 4313/51. Class 38 (v) In a switch in which successive energizations of an electromagnet 14 cause a switch arm 35 to move alternately into and out of engagement with a contact 38, the armature 23 has pivoted to its end a link 39 provided with shoulders 40, 41 which respectively and alternately engage pins 48, 49 on a centrallypivoted rocking member connected by means of the pin 49 to a shaft 50 which operates the contact member 35, a cupped disc 31 providing a snap action by passing through a dead-centre position. At each de-energization of the magnet 14, the armature 23 moves to the left and a cam surface 42 or 43 by engaging the pin 48 or 49 moves the pivoted link 39 into a position for its shoulder 41 or 40 to engage the pin 49 or 48 and actuate the rocking member into its alternative position when the magnet is next energized.
Patent GB-1468836-A (GB)
Title: Multiple pulse capacitor discharge ignition circuit
IPC: F02P15/10
Filed: 1974-01-30
Abstract: 1468836 Ignition circuits R P LEFEVRE 30 Jan 1974 [30 Jan 1973] 4427/74 Heading F1B In a capacitor-discharge ignition circuit comprising a capacitor 14 charged by a power supply 12 and discharged through the ignition coil 16 when a thyristor 103 is triggered by means of breaker points 22, or by magnetic or other ignition timing means, further triggering occurs thereafter to provide a succession of further discharges of the capacitor through the ignition coil. On opening of the points 22, capacitor 86 charges via resistor 82 and the base-emitter junction of transistor 90, the resultant rise in voltage at the junction 88 eventually biasing diode 92 into conduction so that a positive voltage pulse is applied via capacitor 94 to turn on transistor 96, which in turn triggers the thyristor 103 to discharge the capacitor 14 through the coil 16. The opening of the points 22 also removes a short-circuit, effected via a diode 134, for the timing capacitor 126 of a uni-junction transistor pulse generator 26, which then proceeds to emit pulses via an amplifier and pulse shaper 28 to provide repeated triggering, once every 250 micro-seconds, of the thyristor. 103 and consequential repeated discharges of the capacitor 14 through the coil 16. The re-closing of the points 22 re-imposes the short-circuit across the capacitor 126 to stop the generation of pulses by the generator 26 and also applies a negative voltage from capacitor 86 to the base of transistor 90 to turn the latter off. After the capacitor 86 has discharged through resistor 84 and re-charged to a positive voltage sufficient to turn the transistor 90 on again, the transistor then discharges the capacitor 94 via resistors 98 and 100. Until the capacitor 94 has discharged to a sufficient extent, re-opening of the points 22 cannot cause triggering of the thyristor 103. False triggering due to points bounce is thereby prevented.
Patent GB-657223-A (GB)
Title: Improvements relating to spring mattresses and mattress overlay spring interiors
IPC: A47C23/32
Filed: 1949-02-18
Abstract: 657,223. Mattresses. FRASER, J. A., and CRIGHTON, P. F. Feb. 18, 1949, No. 4542. [Class 52 (iv)] In a spring mattress or overlay which is to be folded the border wires 8, 9 are connected at the points of hinging by flexible coupling-sleeves 10 of spirally wound wire or rubber.
Patent GB-785023-A (GB)
Title: Improvements in or relating to methods of detecting loose impurities in transparent containers
Inventor: SMART ALAN THOMAS
IPC: G01N21/90
Filed: 1954-02-16
Abstract: 785,023. Photo-electric indicating arrangements. GENERAL ELECTRIC CO., Ltd. Feb. 16, 1955 [Feb. 16, 1954], No. 4574/54. Class 40 (3). Impurities in a bottle of milk 3 are detected by rotating the bottle, stopping it, and detecting the continuing movement of the impurities by means of a photo-multiplier 9. The bottom of the bottle is illuminated by light sources 4 and light reflected to the multiplier passes through a spiral cut in a slide 7 the spiral being in opposite direction to the movement of the impurity. Thus as the impurity crosses the spiral there will be a reduction in the light reaching the multiplier which may operate mechanism to reject the bottle. The spiral will be intercepted both by heavy particles, which move radially, and light particles which move circularly across it.
Patent GB-618055-A (GB)
Title: Improvements in or relating to potentiometers
IPC: H01C1/12
Filed: 1946-02-14
Abstract: 618,055. Variable contact resistances. STANDARD TELEPHONES & CABLES, Ltd., and LEVY, M. M. Feb. 14, 1946, No. 4629. [Class 37] A spindle 2 is mounted in a bush 25 which is fixed in the base of a moulded pot 1 of insulating material. On the spindle 2 are fixed a radial arm 5 and a disc 6 of insulating material. The arm 5 carries a cursor 16 engaging a spiral groove 17, the ends of which positively limit the maximum possible rotation of the spindle to about 650 degrees. The disc 6 carries a spring metal member 7 having'sliding contacts 24 which wipe over a fixed contact disc 13 carried by an insulating lid 9 for the pot 1. The underside of the lid 9 is formed with a raised spiral track 11 on which is fixed a carbon resistance strip 12 riveted at its ends to terminals 15. A third terminal 14 is riveted to the contact disc 13. A cursor 8 is slidably mounted on the member 7 and has arms embracing the track 11. A central nipple on the cursor 8 engages the carbon strip 12. Rotation of the spindle 2 causes the cursor 8 to move along the spiral resistance strip 12 within positive limits defined by contact of the cursor 16 with the ends of the spiral groove 17.
Patent GB-1531565-A (GB)
Title: Articulated railway wagons
IPC: B61G5/02
Filed: 1976-02-05
Abstract: 1531565 Articulated rail vehicles SOC NOUVELLE DES ATELIERS DE VENISSIEUX 5 Feb 1976 [19 March 1975] 4631/76 Heading B7L An articulated railway vehicle has two frame portions 1, 2 connected by a ball-and-socket 3 and supported by a common wheeled bearer frame 7 at their articulation, and is provided at the vehicle ends with buffer means 5, 6 engageable with thrust bar means 24, Figs. 1 and 2, or 64, 65, Fig. 6, the thrust bar means being operatively connected to thrust transmitting means acting between the two vehicle frame portions 1, 2. In Figs. 1 and 2, the means acting between the frame portions 1, 2 comprise slotted tie rods 15 connected by links 10 pivoted intermediate their ends to the vehicle frame portions at 11, drawbars 17 and further links 20 pivoted to the frame portions at 21, to the thrust bars 24 which are biased towards retracted positions by springs 27. In Fig. 6, hydraulic jacks 50, 51 act between the frame portions 1, 2 and are connected by further jacks 60, 61 whose pistons carry the thrust bars 64, 65. When the vehicle is traversing a curve, relative movement of the frame portions 1, 2 causes the thrust bars on the inside of the curve to be extended to an operative position in which violent braking will cause the buffers 5 or 6 to engage these thrust bars, thus transmitting forces between the frame portions 1 and 2 through not only the ball-and-socket 3 but also the corresponding link system 20, 17, 10 and 15 or hydraulic system including jack 50 or 51. The link system or hydraulic system is thus locked to prevent any excessive rotation of the frame portions 1, 2 relative to one another about the vertical axis of the ball-and-socket 3, hence avoiding. excessive force upon the outer rail of the curved track.
Patent GB-1386081-A (GB)
Title: Hydraulic cements
IPC: C04B28/02
Filed: 1971-02-15
Abstract: 1386081 Cementitious compositions CELMAC AG 18 Feb 1972 [15 Feb 1971 (2)] 4666/71 and 4667/71 Heading ClH A chloride free cement composition contains A.E.M. salt of C 1-5  carboxylic acid (not Ca formate). A COOH acid, A.E.M. CO 3 , -OH- or silicate as accelerators; and sulphite lye; and A.M. (including NH 4 <SP>+</SP>) and A.E.M. chromates, nitriles, and benzoates; and (C 2 H 4 .- OH)3N and salicylic acid are optionals. Sand and gravel (sized) are added for a concrete.
Patent GB-1205203-A (GB)
Title: Improvements in or relating to circuit arrangements for the production of telegraphic pulses
IPC: H04L13/16
Filed: 1969-01-28
Abstract: 1,205,203. Electric selective systems. SIEMENS A.G. 28 Jan., 1969 [2 Feb., 1968], No. 4737/69. Heading G4H. To prevent the generation of a hybrid signal should two keys of a keyboard be operated simultaneously, a generated signal is written in a store within 2Á-sec. of the start of the signal. Depression of a key charges a corresponding capacitor which outputs a pulse 2-3Á-sec. long to a diode matrix, resulting in an n-bit parallel signal. The signal is passed to storage bi-stables via gates. The leading edge of the signal causes the generation of a pulse which inhibits the gates after a period less than 2Á-sec.
Patent GB-862229-A (GB)
Title: Improvements in ion exchange membranes
Inventor: FORDHAM STANLEY
IPC: C08J5/22
Filed: 1958-02-13
Abstract: Ion-exchange membranes suitable for electrodialysis are prepared by bringing polystyrene with polyethylene or polyvinyl chloride into a homogeneous fluid phase, solidifying into sheets or films and then treating with reagents which introduce ion-exchange groups into the polystyrene but which leave the polyethylene or polyvinyl chloride unaffected.  The polymers may be brought into homogeneous fluid phase by heating and/or by the use of solvents.  In examples, sulphonation is effected with chlorosulphonic acid to give cation-exchange membranes.  The other treatment specified is chloromethylation, followed by amination to give anion-exchange resins.
Patent GB-630279-A (GB)
Title: Improvements in or relating to the synthesis of carboxylic acids
IPC: C07C51/14
Filed: 1947-02-19
Abstract: Carboxylic acids are produced by reaction at above 150 DEG  C. and under superatmospheric pressure of a compound containing non-aromatic olefinic unsaturation with carbon monoxide and water in the presence of a preformed nickel or cobalt carbonyl catalyst and in the absence of inorganic acidic substances.  Olefinic compounds used include hydrocarbons, e.g. ethylene, propylene, butene-2, isobutene, pentene-1, tetramethyl ethylene, diisobutene, cracked or dehydrogenated petroleum fractions, cyclohexene, butadiene, isoprene, polymerized dienes, rubber, styrene, a -methyl styrene, vinyl cyclohexene, pinene, limonene, cyclohexadiene and dicyclopentadiene, allyl alcohol, acetate, and ethers, methallyl alcohol, vinyl acetate, furane, methyl acrylate and methacrylate, methallyl propionate, methyl oleate, oleic acid, methyl vinyl ketone and ether, cyclohexene carboxylic acids and their esters, methallyl methacrylate, acrolein and, generally, olefinic esters, ethers, carboxylic acids, amides, aldehydes, and ketones.  Polymerization inhibitors may be employed. The amount of carboxyl catalyst is generally about 0.05-30 per cent by weight of the reaction mixture.  It may be combined with inert materials or promoters, e.g. thoria or manganese.  Pressure may be 50-3000 atm. or more.  Products additional to carboxylic acids may be formed.  Thus, ethylene yields diethyl ketone, and oleic acid yields products containing alcoholic hydroxyl as well as carboxyl. Preferably 0.1-10, especially 0.8-2 moles. of olefin, and 0.1-20, especially 0.8-5 moles. of carbon monoxide are used per mole. of water.  If the amount of water is less than that required for formation of carboxylic acids, other oxygenated products may be produced also.  Temperature is generally 150-500 DEG  C., preferably 175-375 DEG  C.  Inert liquid reaction media such as carboxylic acids, dialkyl ethers, dioxane, cyclohexane, aromatic and saturated hydrocarbons, may be present.  Carbon dioxide may be added to suppress the water/gas reaction.  In continuous operation, tubular converters with temperature and pressure gradients, and introduction of reactants at spaced points may be used.  The carboxyl may be recovered by distillation under a blanket of carbon monoxide.  In examples, ethylene is converted to propionic acid, propylene to butyric acid, and oleic acid yields a product of high acid and hydroxyl number, nickel carboxyl being the catalyst.
Patent GB-548547-A (GB)
Title: Improvements in or relating to broad band high frequency amplifiers
IPC: H03F1/28
Filed: 1941-04-11
Abstract: 548,547. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd., and CHATTERJEA, P. K. April 11, 1941, No. 4847. [Class 40 (v)] A high gain with low noise ratio multi-stage broadband amplifier comprises a plurality of amplifying stages resonant at frequencies spread over the frequency spectrum, some of the amplifying stages being coupled by resonant non- amplifying networks which are preferably resonant at frequencies nearer to the mean frequency than the amplifying stages. The Figure shows an arrangement in which the stages are divided into groups each on an 'insulated chassis A, B and coupled by a network K tuned to a frequency nearer the mean frequency than the amplifier circuits. The non-amplifying network K may be a co-axial conductor cable coupled by auto transformers 'as described in Specification 549,266. The first stage of each chassis unit is preferably resonant at a frequency higher than the mean 'frequency and at least two-thirds of the remaining stages are preferably resonant at frequencies just outside the lower limit of 'the desired frequency band. The Specification gives the frequencies used in a seven stage amplifier operating at 10.25 mc.
Patent GB-433377-A (GB)
Title: Improvements in and relating to brakes for cycles, motor cycles and the like
IPC: B62L1/12
Filed: 1934-02-14
Abstract: 433,377. Cycle brakes. PHILLIPS & CO., Ltd., J. A., and FIELD, W., Credenda Works, Bridge Street, Smethwick, near Birming- ham, Feb. 14, 1934, No. 4850. [Class 136 (i)] In a cycle brake of the side-pull calliper type, the pull of the cable or other transmission member is transmitted to the calliper levers through an intermediate lever, with or without connecting links, in such a way as to reduce the force required to apply the brake. The calliper levers a, b are provided respectively with extension arms d, e, and the casing h of the cable transmission is connected to the arm e, while the cable j is detachably and pivotally connected at k to a lever l, which is pivoted at p to a link q pivoted to the arm d, the inner end of the lever l being pivotally connected to a link m pivoted at n to the arm e. The calliper levers are normally retracted by an arch-shaped wire spring anchored on the pivot c and connected at its ends s to the levers. In alternative constructions, the lever l may be pivoted at p directly on a rigid lug on the arm d, and the inner end of the lever l may be pivoted directly to the arm e.
Patent GB-598958-A (GB)
Title: Improvements in or relating to the conveying of coal from a working face
IPC: E21F13/06
Filed: 1945-06-27
Abstract: 598,958. Conveying coal from working face. EAST, F. R. June 27, 1945, Nos. 4879 and 8149. [Classes 78(i) and 78(iv)] Coal b is broken down and falls on to a series of linked trays d introduced into cut c. The trays are pulled but by a haulage engine (not shown) into the gate road a, preferably over rollers h so disposed that each tray trips and deposits coal on to a conveyer f. Each tray has chains d<1> as in Fig. 2 and overlaps the next tray in order that a large surface of trays may be used. Hooks d<2> and ribs d<3> are optional.
Patent GB-577711-A (GB)
Title: Improvements in means for loading vehicles
IPC: B60P1/48
Filed: 1944-03-16
Abstract: 577,711. Vehicle fittings for loading. BROOKS EQUIPMENT & MFG. CO. March 16, 1944, No. 4947. Convention date, Dec. 31, 1943. [Classes 78 (iii) and 78 (iv)] Pivoted loading arms are mounted at the back of a road vehicle and are actuated by a motor through mechanism of such a character that their angular velocity increases progressively as they turn from the horizontal to the vertical position. The arms F are keyed to the ends of a shaft 36, Fig. 1, which is mounted in depending parts of the side-walls of the load carrying platform D. The upper ends of the arms are connected by a shaft 41 which supports skip carrying chains 45. A slot 50 in each arm receives a roller 91 which is mounted on a curved arm 80. This arm is pivoted to the vehicle at 39 and to the piston rod 72 of a cylinder 70 at 94. Each cylinder is pivoted to the vehicle at 77 and has oil under pressure supplied to it by a pump 66. The skip J is centred on the platform D by guides K, Fig. 4.
Patent GB-583186-A (GB)
Title: An electrically controlled temperature regulator
IPC: G05D23/24
Filed: 1944-03-16
Abstract: 583,186. Automatic control systems. LANDIS & GYR SOC. ANON. March 16, 1944, No. 4948. Convention date, May 17, 1943. [Class 38 (iv)] Temperature.-A temperature regulator having a thermal amplifier incorporated therein comprises a feeler resistance 1 (Fig. 2) connected in series with one coil 2 of an operating instrument (e.g. a Ferraris contact wattmeter or differential relay), a second temperaturedependent resistance 3 (e.g. a metal filament lamp) being connected in parallel with the coil 2. Any change in the resistance of 1 causes an alteration in the current distribution through 2 and 3, thereby producing an amplification across 2 of the current change through 1. The resistance 3 may have a positive or negative temperature coefficient, being connected in series with the coil 2 in the latter case. The effect of ambient temperature changes on the thermal amplifier may be nullified in the case of a Ferraris contact wattmeter by providing a second amplifier 31 (Fig. 4) in the circuit of the second coil 21 of the wattmeter and acting in opposition to the amplifier 3. Fig. 4 also incorporates a resetting device comprising heaters 4, 41 acting on the amplifiers 3, 31 respectively when switched in by contactor 6 worked by the operating instrument to effect a temporary displacement of the standard value to which the device has been set by the variable resistance 5. The sensitivity of the operating instrument may be increased by providing the moving element with a spring, and alternately switching in the resetting heating devices by means of a time switch 10 (Fig. 7), thus maintaining the instrument in periodic oscillation and avoiding starting friction. The system may be applied to the shifting of a regulated temperature in accordance with a second temperature, the variable resistance 5 being replaced by a second feeler resistance. According to the Specification as open to inspection under Sect. 91, the system may be applied to the remote indication of temperature by using an ordinary wattmeter with a temperature scale as the operating instrument. This subject-matter does not appear in the Specification as accepted.
Patent GB-511446-A (GB)
Title: A device for producing large apparent electric powers and for testing apparatus therewith
IPC: G01R31/333
Filed: 1938-02-17
Abstract: 511,446. Testing for faults. GEMEENTE AMSTERDAM. Feb. 17, 1938, No. 4995. Convention date, Feb. 17, 1937. [Class 37] In testing apparatus subject to arcing, e.g. circuit-breakers, fuses and insulation faults in electric cables, wherein a large current through the apparatus under test is immediately followed or preceded by a high voltage, the high current and high voltage have different frequencies and a filter is provided to prevent the voltage source reacting on the current source. The object under test, for example, a switch 1 is supplied with a large current from a source 2 and high tension from a high frequency source 3. The source 2 may be a 50-cycle alternator or transformer, and a filter 4 prevents the H.T. impulses from the source 3 reacting on the source 2. The source 3 may be an oscillating triode valve the output of which is modulated by a voltage wave the frequency of which is equal to that of the current source 2 but which may be displaced in phase therefrom. Alternatively, the H.T. source, Fig. 3, may be a generator 3 operating at the same frequency as the current source 2, each half-cycle of the H.T. wave being split up into a series of impulse voltages the peak values of which vary sinusoidally. Thus, the source 3 charges, through a transformer T3 and resistance 5. a condenser 6 which discharges to produce a voltage impulse across the switch 1 when the voltage across it exceeds the flash over voltage of a spark gap 7. The spark gap comprises an arm 12 rotating in a casing 13 such that the flash over voltage varies sinusoidally. The rotors of the generators 2, 3 and the arm 12 are mechanically coupled together but relatively adjustable, and the spark-gap-casing 13 and the stator of generator 3 are relatively rotatably adjustable, so that the phase relationship of the high current and the sinusoidal impulse voltage envelope may be varied and the impulse voltages may be displaced in the envelope. Figs. 5a. 5b (not shown) illustrate respectively, the decay of the high current when the switch 1 is opened, and the voltage across the switch comprising the sinusoidally varying impulse voltages superimposed upon the recovery voltage of source 2.
Patent GB-469050-A (GB)
Title: Hydraulic circuits and operating devices therefor
IPC: B64C13/00
Filed: 1936-02-19
Abstract: 469,050. Hydraulic apparatus. DUNLOP RUBBER CO., Ltd., WRIGHT, J., and TREVASKIS, H. Feb. 19, 1936, No. 5014. [Class 69 (ii)] [Also in Groups XXI and XXXIII] Rapid-firing guns and camera guns in aircraft are operated hydraulically. The pressure circuit passes through a valve 21 in the handle portion of the chief-flying control, which valve is closed normally by a spring to prevent the passage of liquid. A hand-operated pump 1, or a power pump, expels liquid through a pipe 2 positioned upon the handle 4 of the control 5. On operating a push button 20, fluid is supplied through a pipe 6 to the gun. The pump cylinder 9 is housed in a casing or reservoir 1 filled with oil. The piston is operated by the handle 12 raised against the resistance of a spring 13 which maintains the pressure upon release of the handle 12. Used oil returns to the casing 1 by a pipe 8. When the pump is enginedriven, the inlet 2 and return pipe are interconnected through an excess-pressure, relief valve. The valve 21 is pressed in one direction by the cylindrical button 20 to put the port 14, connected by passage 6 to the gun, in communication with the pressure-liquid, supply port 29 or with the return port 8 by a valve groove 27. The sleeve 16 forming a part of the valve casing has a flange 17 which engages a flange 18 on the button 20. The space housing the spring 26 is connected by a passage 30 with the return pipe to facilitate operations. A safety ring 33 is arranged on the sleeve 16. Leaf springs secured to the ring 33 are housed in grooves 34 in both the ring and sleeve 16, and may pass through slots in the inner wall of the sleeve into an annular chamber 35 to hold the button out of action. On rotating the ring, surfaces on the sleeve 16 press the springs outwardly and free the button. Spring means may be interposed between the ring 33 and the sleeve 16 to hold the ring in the safety or the firing position. A spring-loaded piston may be moved by the liquid to operate the boltrelease mechanism or trigger of the guns. Specifications 469,049 and 469,054 are referred to.