baber/WOPTO huggingface dataset:
Patent GB-1029343-A (GB)
Title: Improvements in or relating to electric wave receivers
Inventor: BARRS RONALD ALBERT
IPC: H03G3/20
Filed: 1964-08-18
Abstract: 1,029,343. Transistor automatic gain control circuits. COMMUNICATIONS PATENTS Ltd. Aug. 18, 1964, No. 33764/64. Heading H3T. In an automatic gain control arrangement the decay time of the control voltage is determined by two delay networks which provide respectively short and long decay times for short and long high-amplitude signals. The arrangement is more particularly intended for C.W. and single side-band telegraph signals and prevents paralysis by bursts of high-level noise. Transistor 1 comprises the last I.F. amplifier of a radio receiver and feeds a detector via the secondary of an I.F. transformer 2 having a tuned primary. It is also direct-coupled to an A.G.C. rectifier comprising transistor 4, the emitter of which is provided with a delay bias from potentiometer 5, 6. Unidirectional collector current pulses from this transistor charge up a long time constant circuit 7, 8 and also, via diode 9 a short time constant circuit 10, 11 from which the A.G.C. voltage is derived over a low output impedance amplifier 13, 14. The arrangement is such that a short high-amplitude signal, e.g. a noise burst, only charges up circuit 10, 11 which rapidly discharges over resistor 12, diode 9 rendering circuit 7, 8 inoperative; a longer signal, however, charges up this latter circuit, which then takes charge as soon as the potential across capacitor 11 falls sufficiently for diode G to become operative. The Specification also refers to the use of a third delay network of intermediate decay time.
Patent GB-812537-A (GB)
Title: Improvements in or relating to lead acid storage batteries
Inventor: ZAHN HAROLD ERNST
IPC: C22C11/06
Filed: 1957-10-29
Abstract: A lead-base alloy suitable for use in the construction of the grids of lead-acid storage batteries has the following composition: Sn 0.5-3.0 per cent, As 0.2-0.5 per cent, Ag 0.05-0.35 per cent, Pb and impurities the balance.  The alloy may be produced by adding an appropriate quantity of "tin solder" (a 50-50 or 60-40 mixture of lead and tin) to molten lead, then adding a lead-arsenic alloy containing 1-2 per cent of arsenic and finally adding either solid silver shot or a lead-silver alloy containing 1-5 per cent of silver. The alloy is then heated to 950 DEG F., stirred to provide a uniform alloy melt and cast.  U.S.A. Specification 2,694,628 is referred to.
Patent GB-502790-A (GB)
Title: Improvements in auxiliary air controllers for internal combustion engines
IPC: F02M23/00
Filed: 1938-11-22
Abstract: 502,790. Charge - forming devices. AKTIEBOLAGET CEVIA. Nov. 22, 1938, No. 33926. Convention date, Nov. 23, 1937. [Class 7 (ii)] A suction-actuated auxiliary air valve 1 is suspended by a rod 7 from a bell-crank lever 8 pivoted at 9 and engaging with its other end, through a roller 10; a disc 11 supported eccentrically from a pivot 12 on an arm 13 which is rigid with a slotted arm 15 and is adapted to be turned about a pivot 14 by movement of the throttle valve 6 to which the arm 15 is connected by links 17, 18; opening of the throttle valve moves the pivot 12 upwards and away from the roller 10 to reduce the force with which the disc engages the lever 8 which is turned by the valve 1 until equilibrium is restored. The effective length of the arm 13 is the distance from the centre of the disc 14 to the pivot 12. The pivots 9, 12 are carried by a detachable housing 2a having a semicylindrical wall disposed between circular end walls one of which carries an air filter. A strap 20 secures the housing to a fixed housing 2 containing the air valve 1. Alternative pivot holes 29, 28 permit the housing 2a to be reversed on the fixed housing 2. In a modification, the arm 13 is'secured directly on the spindle of the throttle valve and the seat for the valve 1 is adjustable.
Patent GB-1359828-A (GB)
Title: Floating deep-digging ladder-type dredges
IPC: E02F9/06
Filed: 1971-07-20
Abstract: 1359828 Dredgers C E McKAY and G P BARKER 20 July 1971 [11 Aug 1970] 34047/71 Heading E1F Pivotally supported from the hull of a dredger is a ladder comprising a plurality of sections that are pivoted together for relative swinging movement in a vertical plane and are supported from the hull by winch-controlled block and tackle systems, and such a ladder provides support af its lower end for excavating means and for a suction pipe of rigid sections secured to the ladder sections and coupled to one another in the vicinity of the pivotal connections of the ladder sections by flexible couplings. The excavating means may be a rotary cutter powered by a motor also mounted on the lowermost ladder section and the suction for the pipe may be provided by a hullmounted suction pump that may be aided by booster pumps located on some of the ladder sections. The block and tackle systems may be such as to allow of vertical location of the upper part of the ladder and the winches of such systems may be controlled by the swellcompensating system of Specification 1359829 to maintain a constant relationship between the cutting head and material being excavated thereby irrespective of movement of the hull due to swell conditions.
Patent GB-498629-A (GB)
Title: Improvements in automatic lighting and extinguishing devices for lights of vehicles
IPC: B60Q1/14
Filed: 1937-12-09
Abstract: 498,629. Mercury switches; partly electromagnetic switches. SOC. ANON. TUBEST. Dec. 9, 1937, No. 34049. Convention date, Dec. 10, 1936. [Class 38 (v)] [Also in Group XXXV] Relates to systems for automatically switching on and off vehicle lamps, particularly parking lamps, of the kind in which a lightsensitive device is used for switching on the lamps when night falls, and for switching off in daylight, and consists in an improvement in a system of this kind employing, as described in Specification 446,230, a switch comprising an inertia-operated pendular blade and a permanent magnet. According to the invention, which has for its object the provision of means for preventing undesired closure of the lamp circuit in certain conditions, the pendular member is adapted to be applied either against a permanent magnet, to close the lamp circuit, or against an electromagnet which is energized during periods of darkness, and which then serves to keep the lamp circuit open. In the construction shown, the light-sensitive device comprises a bulb 8 containing a liquid and a mixture of gases which tend to combine into a liquid under the action of light. The bulb also contains electrodes 9, 10, connected as shown in a battery circuit which includes a resistance 11 and mercury in one limb of a U-tube 1. The tube 1 communicates through a pipe 5 with a chamber in a vessel 6, which chamber is separated by a diaphragm from another chamber connected by a pipe 7 to the bulb 8. A parking lamp 13 is connected to the battery 12 and to contacts 21, 21<1> which are closed by a pendular blade 15, forming the armature of an electromagnet 16, when the blade is attracted to a permanent magnet 14. A contact 2 protruding into the tube 1 is connected through a fuse 17 to the contact 21<1> and to the magnet 16. Additional contacts 4, 26 in the tube 1 are connected as shown. The action of the apparatus is as follows. When the vehicle is run in daylight, the blade 15 is moved, due to its inertia, into engagement with the magnet 14, by which it is held so as to close the contacts 21, 21<1>. No current flows through the magnet 16 and the lamp 13 during this period, since pressure in the bulb 8 is low, and the mercury rises in the right-hand limb of the tube 1 whilst it falls in the left-hand limb, breaking circuit at 2. When darkness occurs, the pressure in 8 rises, and the mercury is forced upwards in the left limb of the tube 1, completing the circuit of the lamp through the contact 2, the magnet 16 being energized at the same time. If it is desired to switch off the parking lamp during the period of darkness, e.g. when the vehicle is running, or to prevent automatic lighting of the lamp when the vehicle is in a garage, the blade 15 is brought into contact with the electromagnet 16 which whilst it is energized holds the blade away from the contact 21<1>, Specification 463,994 also is referred to.
Patent GB-1494831-A (GB)
Title: Methods and means for detection of micro-biological organisms and other contaminants in fluids
IPC: G01N33/04
Filed: 1974-08-02
Abstract: 1494831 Measuring conductivity of milk D D A FRASER 2 Feb 1975 34129/74 Heading G1N Contaminated fluid, e.g. milk from a mastitis infected animal is detected by passing the fluid from different sources e.g. teats between the electrodes of separate conductivity cells, electrically energizing the cells, comparing the outputs of all cells with each other and detecting any differences. The electrical outputs may also be compared with a reference representing a healthy animal. Conductivity cells 2 mounted in the claw 1 of a milking machine are fed from oscillator 3 with 2À5 KHz A.C. The cell outputs are all compared by circuits AB-CD and, if any difference is found, a warning lamp 12R is illuminated. A "norm" is established for a milk sample from a healthy animal by adjusting potentiometer 4. Comparator 5, which includes a signal lamp then indicates if the conductivity of the milk varies from a norm, even if the outputs of all cells are the same. The comparators AB-CD each comprise a differential amplifier and a bi-stable circuit connected to the comparator output by a variable resistor which alters the trigger level permitting compensation for differences in cell parameter.
Patent GB-1117689-A (GB)
Title: An electric control system for controlling the sequential operation of an appliance
IPC: G05B19/02
Filed: 1966-07-29
Abstract: 1,117,689. Washing machines. MALLORY TIMERS Ltd. 29 July, 1966 [7 Sept., 1965], No. 34193/66. Heading D1A. [Also in Division G3] A system for controlling the sequential operation of an appliance such as a washing machine comprises cam-switching means driven by a timer motor for energizing a motor of the appliance for predetermined time intervals, a circuit responsive to a sensor to apply full wave alternating current from a power source to the timer motor, and centrifugal switching means coupled to the motor of the appliance to maintain that motor and the timer motor energized. The sensor 31 may be constituted by a resistance having a value inversely proportional to the level of liquid in a washing machine. During filling of such machine before the required liquid level is attained a half wave current, insufficient to energize the timer motor 10, is passed through the latter in a circuit including the secondary coil of a transformer 22, a diode 25 and a resistor 28. When the required liquid level is attained the sensor 31 causes a transistor 27 to become saturated whereby a further diode 26 becomes effective and full wave current is passed through the motor 10 to energize it. Energization of the motor 10 is maintained for a predetermined period, before the main appliance motor 15 (Fig. 1, not shown) is energized, by contacts 23 closed by a cam 32. When the motor 15 is energized by closure of contacts 14 (Fig. 1 not shown) by a cam driven by the timer motor 10 a centrifugal switch 17 is closed by the motor 15 to maintain the timer motor 10 energized. A further centrifugal switch 16 (Fig. 1, not shown) is closed by the motor 15 to maintain that motor energized until the circuit thereof is broken by the opening of contacts by a further cam driven by the motor 10. The sensor may alternatively comprise a temperature sensing resistor with a negative temperature coefficient and responsive to the temperature of the appliance.
Patent GB-1514665-A (GB)
Title: Double glazed window units and border elements for use therein
IPC: E05F11/12
Filed: 1976-08-17
Abstract: 1514665 Frame member for double glazing unit SUPERSEAL CORP 17 Aug 1976 [18 Sept 1975] 34230/76 Headings E1J and E1R An elongate frame member of vinyl plastics material for a double glazing unit comprises in cross-section a channel with a web 30 and side walls 32, 34 and two hollow enclosed portions 46, 50; portion 46 being formed by web 30, walls 40, 42 (configurations of walls 34, 32 respectively) and wall 44; portion 50 being formed by walls 34, 40 and walls 52, 54 and 56. A groove 58 for a sealing strip 60 may be provided. A reinforcing member 48 e.g. of metal may be provided within the hollow portion 46; this may have screw receiving grooves 66 usable for joining adjacent members at the corners of a frame, flanges 61 for a window opening mechanism and may receive hinges. Corner pieces with spigots fitting into hollow portions 50 may also be provided.
Patent GB-956768-A (GB)
Title: Improvements in or relating to timing devices
Inventor: SHELLEY JOHN HENRY
IPC: G04C3/06
Filed: 1959-10-09
Abstract: 956,768. Oscillating motors. S. SMITH & SONS (ENGLAND) Ltd. Oct. 27, 1960 [Oct. 9, 1959], No. 34297/59. Heading H2A. [Also, in Division G3] An electromagnetically maintained balance assembly of a timing device comprises a balance 1 from which depends a flat coil 2 which swings through the gap 5 of an electromagnet 3, 4. The coil 2 is tapped at 7, Fig. 3, to provide a triggering portion and a driving portion connected as shown to a transistor amplifier 6 so that the balance is impulsed in each directionof its swing. The magnitude of each impulse decreases with increase of balance amplitude so as to provide a stabilizing effect. The capacitor 11 prevents self-oscillation of the .transistor circuit. In another example the coil is of elliptical shape and swings through the gap between the polepieces of two U-shaped permanent magnets. The balance being impulsed in one direction of swing.
Patent GB-781929-A (GB)
Title: Improvements in weighing machines
IPC: G01L1/02
Filed: 1954-11-26
Abstract: 781,929. Weighing apparatus. SAUNDERS F. S. BRITISH OVERSEAS AIRWAYS CORPORATION, and ALLTOOLS, Ltd. Jan. 3, 1956 [Nov. 26. 1954], No. 34338/54. Class 143 [Also in Group XIX] In a hydrostatic weighing scale a load bearing plunger 18, which bears on the fluid in a chamber 14 through a flexible diaphragm 19. is guided by plates 37 which make line contact with the plunger and the casing 15. In the embodiment shown in Fig. 2 the plates are triangular in plan and are arranged symmetrically about the axis of the plunger with their bases engaging the flat faces of square cross-section recesses 36 and their apices engaging curved seats 42 on bearing members 43 screwed into the casing. Rubber rings 40 are provided to locate the bases. Screws 44 limit movement of the plunger in the event of the scale being inverted. The chamber 14 conimunicates through passages 24, 26 (Figs. 4 and 5, not shown) with a weight calibrated pressure gauge and an air bleeding valve respectively. In a modification the triangular plates are replaced by rectangular plates 137 which each make line contacts with flat surfaces 142 on a pair of screws 143, and with the cat surfaces on plunger, the outer ends of each plate being located by a further pair of rubber rings 144 arranged above and below the plate. The casing 115 is formed in one piece and has a recess in its base (not . shown) for engaging a sealing bead on the diaphragm. The Specification states that the device may be used as a thrust meter with the plunger extending horizontally. Specifications 564,287, 617,429 and 627,536 [Group XIX] are referred to.
Patent GB-836255-A (GB)
Title: Improvements in or relating to multiconductor electrical cables
IPC: H01B11/00
Filed: 1957-11-05
Abstract: A multi-conductor electrical cable contains at least two conductors each of which is covered by a differently-coloured insulating material selected from the following compositions, 0.18 to 22 phthalocyanin blue, 0.9 to 1.1 titanium dioxide; 0.9 to 1.1 lead chromate-lead molybdate orange, 0.27 to 0.33 titanium dioxide; 0.18 to 0.22 phthalocyanine green, 0.36 to 0.44 benzidine orthotoluide-coupled yellow, 0.9 to 1.1 titanium dioxide; 0.9 to 1.1 lead chromate-lead molybdate orange, 0.036 to 0.044 carbon black, 0.45 to 0.55 titanium dioxide; 0.027 to 0.33 carbon black, 0.9 to 1.1 titanium dioxide; 0.9 to 1.1 pyrazolone type red, 0.45 to 0.55 titanium dioxide; 0.36 to 0.44 carbon black; 0.63 to 0.77 benzidene ortho-toluide-coupled yellow, 0.9 to 1.1 titanium dioxide; 0.09 to 0.11 carbazole derivative violet, 0.9 to 1.1 titanium dioxide; 0.67 to 0.83 aluminium powder, 0.67 to 0.83 of benzidine orthotoluide-coupled yellow, 0.27 to 0.33 lead chromate-lead molybdate orange; all together with an antioxidant and the remainder a saturated hydrocarbon polymer or copolymer derived from mono-olefines or mixtures thereof, all the amounts being based on weight per cent.  Polymers specified are polyethylene in solid or expanded form of low or high density type, polyisobutylene, polypropylene, polybutene-1, and polymers of 3-methylbutene-1, 4-methylpentane-1, 4,4-dimethylpentene-1, dodecene-1, and 3-methylpentene-1, and the antioxidant may be 4,41-thiobis-(6-t-butyl-m-cresol).  The compositions are prepared by milling a master-batch which is added to further polymer, and the products may be extruded about copper conductors.
Patent GB-282685-A (GB)
Title: Metallic cloth for paper making machines
IPC: D21F1/10
Filed: 1927-12-20
Abstract: 282,685. Kastner, R. Dec. 24, 1926, [Convention date]. Wire cloths.-In metallic cloths for papermaking machines, .greater fiexibilty is obtained, and wear of the cloth is reduced by the use of a double or multiple weft b<1>, Fig. 4, with a single warp a', the two or more wefts being in contact in the weave. The same effect can be obtained by the use of wefts b, Figs. 2, 3, of flat or oval cross section. Metallic cloths so produced are thinner in a fabric having the same weight per unit area as that of a single weft fabric, also the longitudinal flexibility is greater. The seam of endless fabrics made therefrom mav be strengthened by using weft wires of larger diameter on either side of the seam.
Patent GB-1496919-A (GB)
Title: Adaptable force transducer
IPC: G01L9/00
Filed: 1975-08-20
Abstract: 1496919 Force transducer KISTLER INSTRUMENTE A G 20 Aug 1975 [17 Sept 1974 34542/75 Heading G1N The invention relates to adjusting the sensitivity of a force transducer. The force transducer is of the type comprising a pair of elements 1, 2 through which a force, in use, is applied to an electromechanical transducer element 3 located therebetween and a parallel force element 4 extending between the pair of elements 1, 2 and the sensitivity is adjusted by meshing the parallel force element after the transducer has been assembled so as to change the flexibility thereof. As shown the parallel force element 4 is counterbored. The parallel force element may surround the transducer element in which case the outer surface thereof is formed with a groove Figs. 2, 5 (not shown). The parallel force element may comprise a similar extension to one of the pair of elements in which case an annular groove is formed therein, Fig. 3 (not shown). A combination of the abovementioned grooves may be provided Fig. 4 (not shown) and in this case the transducer may also be responsive to pressure when housed in a cavity. The transducer may be provided with a pre-loading element (Fig. 3).
Patent GB-1129191-A (GB)
Title: Improvements in or relating to control systems
IPC: G05B19/40
Filed: 1966-08-02
Abstract: 1,129,191. Programmed control of movement. SUPERIOR ELECTRIC CO. Aug. 2, 1966 [Aug. 4, 1965], No. 34660/66. Heading G3N. A control system for producing predetermined movement of a load along two axes comprises, for each axis, a reversible electric motor translating a change of energization into a known movement, a counting means for the changes of energization and a means terminating the change of energization when the count in the counting means corresponds to the information desired for the axis from a data means. As shown, the X and Y axes drive arrangements 11, 12 are similar and for the X axis comprises a load 15, driven by a stepping motor 13, effecting a rotative increment in response to a change in energization derived from a motor control circuit 17 controlled with pulses, each of which causes a change in energization, from an oscillator 19. The pulses from the oscillator are also fed to a binary coded countdown counter 21 which is set to the desired number of changes of energization for the motor by a setting circuit 23 responsive to the state of a sequence logic circuit 25, which also determines, through the oscillator 19, the direction of rotation of the motor 13. The counter 21 incorporates a backlash control 21-1, whereby the motor always reaches its final position in the same direction, as disclosed in Specification 1, 086, 273. The instructions for the desired changes of energisation of the motors 13, 14 and for the initiation of other functions are contained on a punched tape 27, Figs. 8, 9 (not shown), which is read by a reader 28 sequentially operated by a drive 29. The read information is decoded in a block 30 and stored in a block 31, which sets up the sequence logic circuits, and an auxiliary sequence and cycle control 32. At completion of a movement a drill or cutter is actuated through a circuit 33 which is inhibited during movement by a signal from the auxiliary cycle control 32. The system is manually operated through a block 35.
Patent GB-992630-A (GB)
Title: Process for the production of meta-alkylphenols
Inventor: BONDY HERBERT FREDERICK
Filed: 1960-10-12
Abstract: A process for converting a para-alkyl-phenol into a meta-alkyl-phenol comprises heating of para-alkyl-phenol in the presence of a catalyst comprising an activated bleaching earth, e.g. fullers earth and an inorganic acid, e.g. concentrated sulphuric acid.  Preferably the reaction is carried out at a temperature in the range of 175-185 DEG C.  In an example, paratertiary butyl phenol was mixed with activated fuller's earth and sulphuric acid and the mixture stirred at 180 DEG C. for 3 hours after which it was cooled, neutralized and filtered and fractionally distilled, giving small amount of phenol and a mixture consisting of 30% of meta and 70% of para-tertiary butyl phenol.
Patent GB-308338-A (GB)
Title: Improvements in or relating to preparing machines for spinning
IPC: D01H5/02
Filed: 1927-12-22
Abstract: 308,338. Textile Accessories, and Fievet, E. Dec. 22, 1927. Gill boxes &c.- Means for cleaning the faller bars and the gill pins as they drop from the upper to the lower slide comprises a resilient member arranged to contact with the lower drawing-roller and to be compressed by the bar and the pins in their movement. A member 9, such as a rubber tube, is supported on a wire 10 forming part of a stirrup 11 suspended to oscillate about holes 12 in the conductor 4. The member 9 is compressed by the bar 7 as it drops and partially regains its original form to contact with the pins 8.