baber/WOPTO huggingface dataset:
Patent GB-845267-A (GB)
Title: Improvements relating to electronic circuits
Inventor: KAY ANTHONY GILBERT
IPC: G06G7/24
Filed: 1955-10-20
Abstract: 845,267. Non-linear valve circuits. METROPOLITAN-VICKERS ELECTRICAL CO. Ltd. Oct. 24, 1956 [Oct. 20, 1955], No. 30048/55. Class 40(6). [Also in Group XXXVI.] A non-linear circuit for simulating the response of a physical system to an input stimulus, and especially where the speed or time constant of the response varies with the level of the stimulus or of the response, comprises a direct-coupled valve amplifier provided with a negative feedback loop having an adjustable time constant and means for automatically adjusting the time constant in accordance with the signal level applied to the circuit. The input signal V t  is applied through resistor R 2  to the grid of valve V 1  the output from which is coupled back to the grid through cathode-follower V 2 . D.C. supply 2 and resistor R1 and capacitor C connected in parallel. In order to reduce the time constant of the feedback loop in steps at predetermined levels of the output signal V 0 , resistors R 3  and R 4  which are connected in series with respective diodes of the double diode V 3 , are connected successively in parallel with resistor R 1  as the signal level increases so as to overcome the bias applied to the diodes from potentiometers Pi, P 2  respectively, the potentials across the potentiometers being stabilized by discharge tubes V 4 , V 5 . As a result, the time constant of the feed back circuit decreases as the level of the input signal is increased and the response of the circuit to an input step signal becomes more rapid, Figs. 3b, 3c (not shown) while for steady-state conditions the input/output characteristic of the circuit is such that the incremental gain is greatest for small values of V i  and V 0 , as shown in Fig. 3a.
Patent GB-171603-A (GB)
Title: Improvements in and relating to devices for delivering measured quantities of liquidand the like
IPC: B67D7/60
Filed: 1920-10-25
Abstract: 171,603. Mackenzie, K.. D., and West, G. Oct. 25, 1920. Relief devices; single-acting bucket pumps; measuring devices; regulating delivery by accumulator fitted to pump barrel. - A pump for delivering measured quantities of liquid comprises a barrel 1 and a piston 3 provided with valves 6 and reciprocated by rack and pinion 4 or by other means. The liquid enters the barrel through a valve 8 and passes through the valves 6 during the downstroke and through the delivery valve 13 during the up-stroke. A relief valve 12 is provided near the inlet valve to allow any excess of liquid in the barrel to escape when the piston is near the end of the downstroke, the valve 12 being more lightly loaded for this purpose than the valve 13. The relief device may consist of a piston 12 adapted to be forced into the barrel 11 by the excess liquid. A counting-apparatus may be attached to the pump.
Patent GB-609493-A (GB)
Title: Improvements in telescopic mine props
IPC: E21D15/28
Filed: 1945-11-10
Abstract: 609,493. Pit props. DIRECTIE VAN DE STAATSMIJNEN IN LIMBURG. Nov. 10, 1945, No. 30102. Convention date, Jan. 13, 1944. [Class 20(ii)] In a telescopic mine prop the outer part 2 is provided with a clamping box in which a wedge exerts a clamping force on adjacent surfaces of outer and inner parts, the force being transmitted by means of a cam lever to other surfaces of these parts at an angle to the first mentioned surfaces. Inside the clamping box 3 the upper part 1 is clamped by means of wedges 4, 5. These wedges bear on their inner sides against clamping plates 6, 7 and on their outer sides against the ends of a cam lever 8. The clamping effect of the wedge 5 is sufficient to support the unloaded upper part 1 while the force exerted by the wedge 4 when multiplied by the cam lever 8, enables the prop to support heavy loads. If the wedge 4 is graduated the clamping force may be adjusted to a desired magnitude.
Patent GB-249046-A (GB)
Title: Improvements in and relating to illuminating appliances
IPC: F21V7/04
Filed: 1925-11-28
Abstract: 249,046. Holophane, Ltd., and Stroud, E. Nov. 28,1925. Mounting electric lamps in lanterns.- In an illuminating appliance an electric lamp bulb is carried by a platform 16 having bent-up tongues 17 adapted to slide within a tubular shadesupporting fitting 11 and is clamped in any desired position for focussing purposes by screws 18 passing through slots 19 in the fitting 11 and engaged by nuts 20.
Patent GB-447243-A (GB)
Title: Improvements in or relating to poultry cages
IPC: A01K31/17
Filed: 1935-11-01
Abstract: 447,243. Feeding-appliances for animals. HUBBARD, W. S., 97, Broadoaks Road, Solihull, Warwickshire, and HUBBARD, H. G., Knockmill Farm, Kingsdown, Kent. Nov. 1, 1935, No. 30147. [Class 5 (ii)] A food hopper for poultry comprises a trough 17 having a baffle or part-cover 18 which leaves an opening 20 at the side of the trough remote from the cage whereby the bird must reach over the baffle to obtain food. The baffle and the bottom of the trough may be inclined as shown, and a narrow opening 19 may be left on the inner edge of the baffle for the return of spilled food or for replenishment.
Patent GB-187476-A (GB)
Title: Improvements in and relating to motor-lamps
IPC: B60Q1/14
Filed: 1922-02-09
Abstract: 187,476. Venables, E. H. Feb. 9,1922. Lantern shutters and obturators. - A motor lamp is provided with means for preventing dazzle, comprising a metal disc 3 mounted on an horizontal spindle 4 approximately in the same plane as the light source, and provided with a spring-controlled crank, adapted to be operated by Bowden mechanism from the driver's seat, to raise and lower the disc. In a modification, two discs are provided and arranged one above the light source and one below, both being operated independently by Bowden mechanism. The disc 3 may be mounted between the source 1 and reflector 2 or between the source 1 and the front glass.
Patent GB-1008704-A (GB)
Title: Improvements in or relating to synchronised time-base circuits
Inventor: MOTHERSOLE PETER LEONARD
IPC: H03K4/43
Filed: 1963-07-30
Abstract: 1,008,704. Valve and transistor saw generators. MULLARD Ltd. July 30, 1963, No. 30174/63. Headings H3P and H3T. Synchronization of a sawtooth oscillator is improved by feeding a synchronizing signal Sc of sawtooth form to an electrode of the valve or transistor other than the electrode controlled by the relaxation wave S. Fig. 5 shows a field timebase for a television receiver in which valves V1, V2 are reciprocally-coupled so as to form a self-oscillating circuit in which capacitor Cs charges via R5 to provide a linear sweep and discharges when V1 becomes conductive. Transistor T1 is non-conductive during each sweep so that capacitor C2 charges via R3 giving a sawtooth synchronizing waveform Sc at the cathode of V1. Each negative-going synchronizing pulse drives diode D1 and transistor T1 into conduction, discharging C2 so that V1 becomes conductive at time t, discharging Cs and terminating the sweep. It is explained in Fig. 4 (not shown) that the freerunning frequency may be equal to greater than or less than the synchronization pulse frequency. Modifications.-C2 may be connected to the cathode of V2 giving improved noise immunity. V1 may be replaced by a blocking oscillator or multivibrator. V1, V2 may be replaced by transistors.
Patent GB-449466-A (GB)
Title: Rectifier for wireless television reception
IPC: H03H7/42
Filed: 1934-10-22
Abstract: 449,466. High-frequency transformers. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. Oct. 22, 1934, No. 30178. Convention date, Oct. 21, 1933. [Class 38 (ii)] [See also Group XL] The input transformer to a push-pull detector more particularly for television is provided with an extension 9 on the primary winding and the windings are so arranged that the mid-point is earthed so that equal voltages are applied to each valve of the pair. The transformer may be of toroidal form with the secondary winding adjustable or of cylindrical form with a screen with the primary next to the screen and the secondary wound with thin wire.
Patent GB-230792-A (GB)
IPC: A41F11/16
Filed: 1924-12-16
Abstract: 230,792. Harzer Hosentrager und G³rtelfabrik G. Hohn. March 15, 1924, [Convention date]. Stocking suspenders; garters; sleeve adjusters.-A band 1 is formed with ribs or protuberances 2 to engage a slide 5, which is not provided with the usual gripping central bar.
Patent GB-207021-A (GB)
Title: Improvements in percussion fuses for projectiles
IPC: F42C1/08
Filed: 1922-11-04
Abstract: 207,021. Armstrong, Whitworth, & Co., Sir W. G., and Taylor, H. G. Nov. 4, 1922. Projectile fuzes. - A percussion fuze is provided with a member adapted to rotate on impact to vary the length of the flash passage thereby delaying the burst of the projectile according to the resistance of the target. This delaying device may be used in combination with other delaying devices. In the fuze shown, a flash passage c is opened by a centrifugal bolt e during the flight of the projectile; and, on impact, the flash from a cap b passes through the ducts c, d, to a member g formed with four grooves m, o, o<1>, q, e a c h extending partly round the periphery of the member, these grooves being bridged over by short longitudinal grooves n, p in the fuze body. The effective total length of the grooves depends on the rotational position of the member g and determines the delay of the flash from the passage d to the charge i in the member g. The member g has a serrated base which is pressed against a serrated seat in the fuze body by a spring washer l. On impact, the member g compresses the spring washer, and, its serrated base being thus freed, turns to an extent determined by the resistance of the target. This changes the position of the bridge grooves n, p relatively to the grooves in the member g and thereby alters the effective length of these flash passages, causing a delay in the transmission of the flash dependent upon the resistance of the target.
Patent GB-656679-A (GB)
Title: An improved furnace for annealing glass
IPC: C03B25/06
Filed: 1948-11-22
Abstract: 656,679. Glass-annealing leers. TRAVAUX ET METALLURGIE SOC. ANON. Nov. 22, 1948, No. 30311. Convention date, Aug. 13. [Class 51(ii)] A tunnel glass-annealing leer in which the tunnel atmosphere is circulated to produce and maintain the desired temperature gradient includes in the heating region a number of zones 7 each formed with a roof recess 13 closed by a pair of heating units 10 one of which is associated with a fan 8 and a deflector 11,'and a floor recess 14 having a fan 9 and a deflector 12 disposed below the second heating unit, the arrangement resulting in the production in each section of a circulation of heated tunnel atmosphere such that the openwork conveyer 3 in the heating region is traversed by alternate upwardly and downwardly directed hot air currents. The heating units may be removed through the side walls of the tunnel and may comprise electrical elements or gas or oil burners. A cooling section of the furnace may have metallic walls with openings in the roof, pressure cooling air being supplied through slots below the conveyer or it may be formed as with zones 7 without the heating elements.
Patent GB-945373-A (GB)
Title: Improvements relating to static switching arrangements of the cross-point type
Inventor: DELLER WILLIAM BERNARD
IPC: H03K17/70
Filed: 1960-09-02
Abstract: 945,373. Automatic exchange systems. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 16, 1961 [Sept. 2, 1960], No. 30371/60. Heading H4K. In a static cross-point switching arrangement using four-zone diodes as the switching devices, a diode is made conducting by the application of a positive and a negative pulse to the two appropriate conductors in the array, the amplitudes of these pulses being unequal but their sum being equal to the breakdown voltage of the diode. A subscriber's line SP1 is transfomer coupled to a Y conductor in the first switching stage S1. Application of positive pulses to the Y conductor and negative pulses to the X conductor from pulse generators PC causes four-zone diode A to conduct and thus extend the connection to the next switching stage S2. Diode A and similarly energized diodes in the communication path, e.g. M, N, P are held by a holding current applied from source Vm and diodes Rf1, Rf3, Rf4, &c., decouple each stage against spurious backward voltages. Zener diodes Df1, Df2 connected as shown, act as limiters for speech voltages applied to the path. It is stated that the application of unequal amplitude positive and negative pulses to the conductors of the array allows the use of fourzone diodes of much lower than usual breakdown voltage, viz. about fifty volts, and also diodes having a relatively wide range of breakdown voltages, viz. 5% of about 50 volts. The last-mentioned features are illustrated using a mathematical argument and it is further shown that the difference in amplitude between the positive and negative pulses should be about equal to half the difference between the amplitudes of the maximum and minimum standing voltages encountered. These latter occur at the points marked x and y respectively and consist of the potential due to the holding current together with the fluctuations in speech voltage. Specification 813,862 is referred to.
Patent GB-930319-A (GB)
Title: Improvements in or relating to ball-joint coal-cutter chains
Inventor: PROCTOR SYDNEY ERNEST
IPC: E21C25/36
Filed: 1960-09-02
Abstract: 930,319. Coal cutter chains. AUSTIN ROY & CO. Ltd. Aug. 31, 1961 [Sept. 2, 1960], No. 30398/60. Class 24. Each link of a coal cutter chain comprises a base 11 (which in use runs in the chain jib guide slot), a stem 12 upstanding from the base and carrying a ball 13, a socket 20 which is open towards the base and adapted to fit the ball of the next link, and a cutter box 31 mounted on the blind side of the sockets. Preferably the socket incorporates detachable part-spherical lines 22, 23 and the ball is screwed on to its stem. The invention is stated to be particularly applicable to side-cutting systems in which the drive sprocket (not shown) is in a plane perpendicular to the Figure but parallel to the base 11 and engages the outer surfaces of the sockets 20.
Patent GB-1014689-A (GB)
Title: An apparatus for delivering fibre material coming out of a blowing room to carding engines
IPC: D01G23/00
Filed: 1963-07-31
Abstract: 1,014,689. Pneumatically feeding fibres to carding engines. DAIWA BOSEKI KABUSHIKI KAISHA. July 31, 1963 [Aug. 7, 1962], No. 30421/63. Heading D1N. Apparatus for pneumatic transfer of fibrous material from opening and cleaning machines to a battery of carding engines comprises a duct 1, and branch ducts 3 extending downwardly from said duct and each having revolvable transfer means facing the lower end of the duct to transfer the fibres to the dish plate 6 of the respective carding engine. The transfer means may comprise a perforated belt 5 (Fig. 6) mounted underneath the branch duct 3 to extend downwardly or upwardly, Fig. 5 (not shown), and possibly having a section zone provided within Figs. 12 and 13 (not shown) or a perforated suction cylinder 141, Fig. 14, mounted beneath the duct 3, or an imperforate belt. In the latter case air escapes between duct 3 and press roll 7 and/or through perforations in the lower part of the casing of duct 3. To even the supply of fibres to successive ducts 3, the area of the openings 2 of the ducts 3 may successively be increased, or the cross-sections of duct 1 be gradually decreased, or additional air or air and fibres may be provided from auxiliary duct 61 through spaced ducts 62 to duct 1. The angles of ducts 62 with respect to duct 61 may be varied, or valves inserted in them. Control devices may comprise air shutter plate 81 adjustable within the belt, a pivoted front plate 83, a control wing 101 Fig. 10 (not shown) or rotor 111, or a plate 112.
Patent GB-391798-A (GB)
Title: Improvements in pencil leads
IPC: B43K19/02
Filed: 1931-11-03
Abstract: 391,798. Pencils. RADEMACHER, E., 22, Venloerstrasse, Dusseldorf, Germany. Nov. 3, 1931, No. 30474. Convention date, Nov. 24, 1930. [Class 146 (iii).] Pencil leads contain, as binding-agent, cement, hardened albumen products such as glue, gelatine, or casein, hardened water-soluble cellulose derivatives, water-insoluble cellulose derivatives other than pyroxylin and derivatives dissolved in fats, fatty acids, or higher hydrocarbons, artificial resins, or rubber derivatives, so that they will be unaffected by moisture. The cement is mixed up with water, and after setting is unaffected by moisture ; the albumen products are rendered innocuous to water by heating or by treatment with formaldehyde or the like ; the cellulose and rubber derivatives are fused or dissolved in organic solvents, and after cooling or evaporation of the solvent are stable towards water ; the water-soluble cellulose derivatives, e.g. ethoxymethyl cellulose, are dissolved in water and after working up are hardened ; artificial resins are used in liquid form, and after setting and heating are rendered insoluble. In making graphite leads the addition of clay and the burning process are unnecessary. According to examples, casein dissolved in dilute ammonia is mixed with eosin, talc, and a substance containing fatty acid to impart smoothness, the mixture being pressed into the form of leads, dried, and hardened with formaldehyde ; eosin, talc, and liquid phenol-formaldehyde artificial resin are mixed with substances containing fatty acid, pressed into lead form, and heated. The Specification as open to inspection under Sect. 91 refers also to the use of lime, resin soap, resins, vulcanite, and drying or semidrying oils. This subject-matter does not appear in the Specification as accepted.
Patent GB-174713-A (GB)
Title: Improvements in forced feed lubricators
IPC: F16N13/22
Filed: 1920-10-28
Abstract: 174,713. Percival, S., (Ellis, C. C.). Oct. 28, 1920. Auxiliary actuating gear; casings for actuating- mechanism; rod guides; cam-actuated pumps; mountings; multiple-delivery piston pumps; revolving-cylinder pumps; strainers; suction reservoirs; valves, arrangement of.-A multipledelivery lubricating pump comprises a fixed casing a provided with a number of delivery ports k adapted to register with ports l helically disposed on a rotating cylinder b in which the plunger c reciprocates. The cylinder b is rotated by bevelgear e, e<1> driven by pawl and ratchet gear f<1>, f<2> or by a hand-wheel f. The plunger c is rotated with the cylinder by means of a squared band c<1> engaging two guide members b<2> on the cylinder, and is reciprocated by a coaxial cam g carried by an extension c<2> of the plunger and engaging two fixed rollers g<1>, g<2>. The actuating-mechanism is enclosed in an oil reservoir d provided with a. filling-cap d<2> and a strainer m, and communicating by a passage i<1> and port i with an inlet port j in the cylinder b. The casing a has a flange a<1> for supporting the reservoir d and a flange a<2> for mounting the pump. The ports l may be arranged in a straight line and the ports k in helical order.. Some of the ports l may be larger than others.
Patent GB-464089-A (GB)
Title: Improvements in and relating to centrifugal pumps
IPC: F04C19/00
Filed: 1936-11-09
Abstract: 464,089. Centrifugal pumps. MACHINEFABRIEK GEB. STORK & CO. N. V., and BARGEBOER, A. Nov. 9, 1936, No. 30579. Convention date, Nov. 16, 1935. [Class 110 (i)] In a pump of the liquid-ring type the edges of the vanes 15 on the rotor are -not parallel with the axis of the shaft 3. The inlet and outlet ports 14, 13, lead from and to chambers A, B, displaced axially from the pumping chamber. The edges of the vanes may be curved or have projections of trapeziform shape, In a modified description circular straps are secured around the outer edges of the vanes, the straps having projections attached. The outer edges of the vanes may be curved. In a further arrangement the casing bore is irregular in axial cross-section having a corrugated appearance. Fig. 9 shows a modification in which the casing bore is curved inwards to screen the projection P in the neighbourhood of the inlet and outlet ports 14, 13.
Patent GB-901803-A (GB)
Title: Improvements in or relating to devices for securing a winding to a rotor
IPC: H02K3/46
Filed: 1959-09-08
Abstract: 901,803. Securing coils for dynamo-electric machines. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 8, 1959 [Sept. 11, 1958], No. 30625/59. Class 35. A device for receiving windings 5 in slots 4 in a cylindrical rotor 1 comprises members 3 passed over the ends of shaft 2, the tips 7 of the radial arms being bent over the coils to hold them against centrifugal force. The members, which engage the end faces of rotor 1, are of a rigid non-magnetic material such as brass and the member is so shaped as to keep slots 4 clear for insertion of the coils.
Patent GB-520489-A (GB)
Title: Improvements in or relating to deflecting circuits for use with cathode ray tubes
IPC: H04N3/22
Filed: 1938-10-24
Abstract: 520,489. Television. FERNESCH AKT.-GES. Oct. 24, 1938, No. 30652. Convention date, Oct. 23, 1937. [Class 40 (iii)] Resistances 1, 2, Fig. 3, form a bridge, from which tappings supply direct current as desired to the deflecting coil 12, the tappings being connected by a condenser 7 to shunt the deflecting oscillations. In a modification, Fig. 4, the bridge is formed by resistances 2, 8, 9, and the coil 12 is fed with deflecting oscillations over a transformer 17.
Patent GB-159979-A (GB)
Title: Improvements relating to mixtures for use in the production of blocks or slabs for building and other purposes
IPC: C04B20/10
Filed: 1919-12-09
Abstract: 159,979. Laurie, A. P., Sutcliffe, E. R., and Sutcliffe, Speakman, & Co., Ltd. Dec. 9, 1919. Making and finishing blocks, slabs, &c.-Blocks, slabs, &c. are made by mixing a dry binding agent such as plaster of paris, Portland cement, or magnesia cement with a moistened absorbent vegetable substance and moulding the mass under pressure to express the liquid from the absorbent substance into the binding agent. In an example, to 1 lb. of sawdust is added an equal quantity of water, producing a damp granular mass. 3 lb. plaster of paris is mixed with this, and the dry mass is moulded under a pressure of about half a ton to the square inch to squeeze the water into the plaster. The slabs &c. are removed from the moulds and dried for about three weeks preferably in piles under weights to prevent warping. When oxychloride cement is employed, the sawdust &c. is moistened with a solution of magnesium chloride, and magnesia is added. The slabs may be reinforced with expanded metal &c. placed in the mould with the granular material.
Patent GB-1223235-A (GB)
Title: An induction system for internal combustion engines
IPC: F02M9/10
Filed: 1969-06-18
Abstract: 1,223,235. Spray carburetters, regulating I.C. engines. DR-ING h. c. F. PORSCHE KG. June 18, 1969 [July 19, 1968], No.30834/69. Heading F1B [Also in Division G1]. An induction manifold passage 13 has a section 14 of resilient material the through-flow crosssection of which is variable by relatively movable plates 24 acting thereon. The plates 24 are operated by an electric motor 9 controlled in dependence upon the position of the accelerator pedal and at least one operating condition of the engine. The motor may be controlled by a device (7), Fig.1 (not shown), receiving signals from transmitters (5, 5<SP>1</SP>), e.g. potentiometers, connected to the induction manifold 2 and the accelerator pedal (4). The motor control device (7) also receives a signal from a transmitter 10 associated with the plates 24. The motor 9 moves the plates 24 through a ring 25 co-operating with a pinion 27 on the motor shaft 26. The shaft 26 is threaded into a fuel metering needle 29 guided axially by a member 30 located in a groove 31.