baber/WOPTO huggingface dataset:
Patent GB-232063-A (GB)
Title: Improvements in electro-magnetic brakes
IPC: B60T13/74
Filed: 1924-05-26
Abstract: 232,063. Scott, W H. May 26, 1924. Electric and magnetic; energy-absorbing elements; cone and disc; actuated or applied by springs. - Comprises an air-cooled electromagnetic brake. A hollow disc B keyed, with axial play, to the shaft A of an electromotor to be braked rotates between non-rotary discs C, F which, upon de-energization of a solenoid G are caused by springs f<1> to embrace the disc B. The disc C is attached to, but spaced by openings d from, the motor casing E, and supports a casing I upon which the disc F is positioned. Air passages K, K<1> are formed in the casing I and the disc F respectively. The disc B may carry vanes. Cooling is effected by air, circulated by centrifugal force through the openings K, K<1>, d, and openings J in the periphery of the disc. The latter may carry brake blocks L which co-operate with a stationary ring M when the centrifugal force on the blocks exceeds the pressure of springs l<4>.
Patent GB-621504-A (GB)
Title: Improvements in and relating to cases and other articles
IPC: A24F15/08
Filed: 1946-04-29
Abstract: 621,504. Decorated panels. JACOBSON, R., and VARGA, O. H. April 29, 1946, No. 12908. Drawings to Specification. [Class 93] [Also in Groups XVII and XVIII]  A decorative panel comprises a background and a sheet of transparent material surmounting the background which sheet is provided with an opaque pattern in which the background is formed with light reflecting and light absorbing portions so that the pattern is viewed in contrasting lights. The pattern is etched, engraved, coined or otherwise introduced into the inner or rear surface of the sheet and a panel of light reflecting and light absorbing portions placed in contact with or parallel to the face containing the pattern. The non-reflecting surfaces may be black or some dark colour, and the reflecting surfaces may be of silver or gold colour. The invention may be applied to a cigarette case or box, to a table lamp, wall lighting, or for advertising purposes. The panel may be illuminated by artificial light, e.g. in the table lamp the light from the lamp may be directed towards an edge of the panel.
Patent GB-566672-A (GB)
Title: An improved means of forming sheet-metal
IPC: B21D37/04
Filed: 1943-10-11
Abstract: 566,672. Forging; stamping. HELLIWELLS, Ltd., and RANSOM, J. Oct. 11, 1943, No. 12965. Drawings to Specification. [Class 83 (iv)] In stamping sheet metal as described in Specifications 564,650 and 565,681, the die is mounted on a steel or iron backing plate that is held to the press-head by an electromagnetic holder. After shaping the sheet by pressure, the holder is de-energized, leaving the die in contact with the work. The press-head can then be used to strike one or more blows to finish the work by drop stamping. After the last blow, the current is switched on again and the die is again attached to the press-head. The holder also facilitates the changing of dies.
Patent GB-1512507-A (GB)
Title: Oil injected screw compressor apparatus
IPC: F25B31/00
Filed: 1975-04-28
Abstract: 1512507 Separating oil from compressor discharge HOWDEN COMPRESSORS Ltd 28 April 1975 [23 March 1974(2)] 13024/74 and 13026/74 Heading F1N [Also in Divison F4] In a refrigeration system comprising a screw compressor 1, a condenser 17 and an evaporator, an oil separator is provided downstream of the compressor. The system includes means for returning either liquid refrigerant (see Fig. 3) or cooled oil from the reservoir 10 to a spray device 12 located in the duct 6, 7 leading from the compressor, in order to reduce the temperature in the duct 6, 7 to condense any oil vapour. The oil separator 8 includes an arcuate baffle 9 and a filter pack 11. A thermostatic control valve 14 is also provided in Fig. 3 to control the flow of refrigerant to the spray head 12 in response to the temperature in duct 7.
Patent GB-599019-A (GB)
Title: Improvements in and relating to catalytic lighters
IPC: F23Q2/30
Filed: 1945-05-24
Abstract: 599,019. Catalytic lighters ; wicks. CARDINAL PRODUCTS, Inc. May 24, 1945, No. 13037, Convention date, May 12, 1944. [Classes 75 (i) and 75 (iii)] In a catalytic lighter, air admission means is provided so that air may enter the casing 20, Fig. 3, mix with fuel vapour and pass through a valve 95 below a catalyst 106 in a holder 100 in the casing, means being provided for operating the valve and material being provided in the casing for holding the vaporizable fuel. When the cover 40 is operated, it turns about its pivot 47 and depresses a spring-urged rod 26 abutting on the end of a lever 71. This lever tilts about a pivot pin P and raises the valves 75, 95 to admit air to the casing and allow it to mix with the fuel vapour, such as alcohol, before passing through the valve 95 to the catalyst 106. This catalyst, which may be of spongy platinum composition is held between perforated plates 105, 107 in a metal holder 101, or in a ceramic washer in the holder, the holder being mounted in a plastic outer shell 100, screwthreaded to engage the casing 20. The catalyst-containing head H may be removed to supply liquid fuel to the wick 23, excess fuel being poured out, or allowed to drain through and escape through the air admission valve 75. The wick 23, Fig. 14, may have vertical grooves 50, 51 on opposite sides, connected by a peripheral groove 52 so that the air travels a circuitous path while gathering fuel. The wick may be made of substantially cylindrical glass fibres, the glass being in loosely twisted, braided or woven cord form, or in the form of cloth, fabric, tape or a tube, or the fibres may be combined into afluffv wool. The Specification as open to inspection under Sect. 91 states that the glass material may be used in either catalytic or pyrophoric lighters, or for illumination purposes. This subjectmatter does not appear in the Specification as accepted.
Patent GB-945109-A (GB)
Title: Extreme low noise transistor amplifiers
IPC: H03F1/26
Filed: 1962-04-05
Abstract: 945,109. Transistor amplifying circuits. BARNES ENGINEERING CO. April 5, 1962 [April 13, 1961], No. 13154/62. Heading H3T. A low noise transistor amplifier system comprising a signal source and one or more transistor amplifier stages is designed such that the resistance of the signal source Rs is from onethird to three times the optimum value of the resistance source given by r b  being the intrinsic base resistance of the first transistor stage, the collector current I c  of the first stage at least does not exceed 70ÁA, the input impedance of the first transistor is greater than the signal source resistance and the transistor of the first stage has a sufficiently high # at the low collector currents in the range of the operating I c . In the circuit shown in Fig. 1, the output from a thermistor bolometer is fed to the input of a first silicon transistor stage 2N1443 of the five stage low noise amplifier. In accordance with the invention the first two transistors 2N1443 and 2N1247 are operated at low emitter currents of 4ÁA and 20ÁA respectively but the remaining germanium transistors operate at normal currents from 5ÁA upwards. The base bias resistance is made at least twice as high as the source resistance and preferably 5 to 20 times. Stabilization of the amplifier is provided by negative feedback from the output transistor 2N336 to the first transistor 2N1443 and is partly D.C. through resistors 22K and 220K and partly A.C., the amount of A.C. feedback being dependent upon the frequency of operation of the amplifier. Fig. 2 (not shown), illustrates the signal to noise ratio with varying relative amounts of source resistance and amplifier input impedance and Fig. 3 (not shown) illustrates test curves for noise of the first stage of the amplifier using different collector currents, the source resistance in each case being changed to an optimum.
Patent GB-815946-A (GB)
Title: Fluid control valves
Inventor: KEIR ALEXANDER JAMES
IPC: F16K17/00
Filed: 1957-04-25
Abstract: 815,946. Reciprocating pumps. WORTHINGTON CORPORATION. April 25, 1957 No. 13176/57. Class 102(1). [Also in Group XXIX] A clutch between an engine and a compressor driven thereby is hydraulically actuated, the pressure fluid being obtained from a manually operated pump having an outlet passage 22 housing a spring-loaded ball-valve 23. Around the pump is a reservoir 17 from which leads a passage 25 that is connected to passage 22 under the control of another spring-loaded ball valve 26 ; a bypass 28 inter-connects passages 25, 22. In the bypass 28 is a ball valve 31 movable onto its seat by screwing a stem 30 into its housing 29 whilst on the upper part of the stem is a piston 34 having a recess 35 of sufficient size to accommodate an operating knob 32 on the valve stem; the piston is urged to the position shown by a spring 37. To engage the clutch the knob 32 is rotated to seat the valve 31 and the engine is started; when the engine lubricating oil pressure has attained a given value it passes to a conduit 39 and moves the piston 34 against the spring 37 until the knob 32 is completely within the recess 35 and operation of the valve 31 is thus prevented. Upon actuation of the pump the clutch is engaged and it cannot then be disengaged until the engine is stopped and the air pressure drops to enable the spring 37 to move the piston 34 and uncover the knob 32.
Patent GB-582061-A (GB)
Title: Improvements relating to apparatus for frequency multiplication of alternating electric currents
IPC: H02M5/20
Filed: 1944-07-11
Abstract: 582,061. Frequency changing. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., and WALKER, A. H. B. July 11, 1944, No. 13249. [Class 38 (ii)] In a circuit for producing single phase A.C. from a polyphase input in which rectified half waves of successive waves at the input frequency are alternately applied to the ends of a suitable choke or transformer winding having a centre point connected to all the phases, and which supplies the higher frequency output, saturable inductances are connected in the input lines to introduce a third harmonic component into the input current. In a circuit suitable for operation from a two-phase supply, the phases are connected respectively to input terminals 1, 2 and 3, 4 of rectifier bridges R1, R2 and saturable chokes are connected in the input. Output terminals 14, 15 are connected together and through a resistance or load 18 to the mid-point 17 of a choke coil 13. The other output terminals 9, 10 of the rectifier bridges R1, R2 are connected to end terminals 11, 12 of choke 13. The voltage across 11, 12 has twice the frequency of the input, Fig. 2 (not shown). Fig. 3 shows the improved wave form FVV of the output current which results from the third harmonic introduced into the inputs R1I, R2I by the saturable chokes. A modification is described in which a tripled frequency results from a three-phase input, Fig. 4 (not shown). A transformer has a # connected primary with saturable chokes in the supply and two star-connected, threephase groups of secondary windings which are connected to the ends of the choke coil through half-wave rectifiers, and have their star points connected together and to the centre point of the choke through the resistance. Specification 577,270 is referred to.
Patent GB-560180-A (GB)
Title: Improvements in or relating to means for producing alternating current of constant voltage and frequency from variable speed generating means
IPC: H02M7/62
Filed: 1942-09-21
Abstract: 560,180. A.C. generators; automatic regulation. HARMER; H. M. Sept. 21, 1942, No. 13270. [Classes 35 and 38 (iv)] A d.c. generator 2 is excited by a constant frequency a.c. obtained through a vibratory commutator 4 or oscillating valve to produce a.c. of a frequency independent of the speed of the generator. The field circuit is preferably tuned by a condenser 12 in series or in parallel with the field winding 1. Constant voltage may be obtained also by making the source of excitation 3 dependent on the speed of the generator and including in the exciting circuit an automatic regulator according to Specification 554,712, as shown in Fig. 3 and arranged to give a falling excitation voltage with increasing input voltage. The output terminals of the machine may be connected through a regulating arrangement according to any one of Specifications 493,362, 515,207, 521,314, 524,565 or 554,467 ; Fig. 3 shows an arrangement using the first of these and giving a d.c. output of constant voltage.
Patent GB-550198-A (GB)
Title: Tray or table attachment for metal casualty stretcher
IPC: A47B23/02
Filed: 1941-10-16
Abstract: 550,198. Trays or tables. EVELEIGH, F. H., HARRIS, E. A., and HARRIS, E. M. Oct. 16, 1941. No. 13303. [Class 52 (iii)] An attachment to metal framed stretchers, for supporting medical, &c. equipment, comprises a tray shown in plan having a V-shaped part c at one edge to enter a loop leg of the stretcher, and angle pieces F spaced from the V-shaped part to engage beneath the straight parts of the side frame of the stretcher. The V-shaped part is shaped to bring it into contact with the wire edge of the surface of the stretcher.
Patent GB-1159631-A (GB)
Title: Method of and Means for Feeding Liquid Propellants to Rocket Engines
IPC: F02K9/44
Filed: 1967-03-21
Abstract: 1,159,631. Rocket engines - liquid propellant supply. BÍLKOW G.m.b. H. March 21,1967 [March 25, 1966], No. 13306/67. Heading F1J. The invention relates to a method of supplying propellants to the combustion chamber of an intermittent combustion type rocket. The propellants are supplied to the combustion chamber by utilizing the pressure pulsations occurring in the combustion chamber. In the rocket motor shown two propellants are supplied intermittently into the combustion chamber 1 by means of reciprocating plunger pumps 10,11. A control piston 4 is provided being disposed in cylinder 3 which communicates with the combustion chamber through a restricted duct 2. The piston is loaded downwardly by means of a spring 5 and a member 9 carried by the piston rod 8 co-operates with the piston rods 12 of the pump plungers 13. The arrangement is such that upon increase in pressure in the combustion chamber 1, the control piston 4 is moved upwardly to the position shown. This allows the pump plungers 13 to move upwardly by means of the springs 14 so that propellants are drawn into the pump chambers 21 through the inlet valves 17. When the combustion chamber pressure falls the piston 4 is moved downwardly by the spring 5, the downward movement of the member 9 moving the pump plungers 13 downwardly so that the propellants are discharged through the outlet valves 18 and ducts 16 into the combustion chamber, the resulting increase in pressure starting a further cycle. The control piston 4 may be locked in its uppermost position by means of a locking pin 25 so that operation will start as soon as the locking pin is released. Means may be provided to vary the length of stroke of the pump plungers 13 by means of a screwed stop member. Also the loading of the pump plunger springs may be varied by means of a screwed spring abutment member, thus varying the frequency of the pulsating system.
Patent GB-682110-A (GB)
Title: Improvements in or relating to telescopic suspension devices for vehicles
Inventor: THORNHILL PETER WARBORN
IPC: F16F9/06
Filed: 1950-05-26
Abstract: 682,110. Oleo-pneumatic suspension devices. LEVITATION, Ltd. May 24, 1951 [May 26, 1950], No. 13346/50. Class 108 (iii). A telescopic suspension device for vehicles includes a first liquid chamber of variable volume, the liquid in which is subjected to pressure exerted by the weight of the vehicle, a second liquid chamber, the liquid in which is subjected to pressure exerted by compressed air, and a pair of separate oppositely acting non-return valves controlling separate passages connecting the first and second liquid chambers, each of the non-return valves being urged towards its closed position by the pressure of liquid in the chamber into which liquid flows through that valve acting on one side thereof, a smaller area on the other side of the valve being exposed to the liquid pressure in the other chamber, and the remaining area of the other side of the valve being exposed to a low, substantially constant pressure such as atmospheric pressure. In the arrangement shown, in which a first liquid chamber 34 is defined by a plunger head 16 and a cylinder 10 and in which a second liquid chamber 33 is defined by the plunger head and a floating piston 31 within a plunger tube 11, the latter is slidable with clearance in the cylinder 10 and the plunger head engages the cylinder 10 through a fluid-tight packing 17. A pair of opposed valve members 23, 24 disposed in a bore 18 in the head 16 are urged by a tension spring 28 into seating engagement with frustoconical recesses 19, 20 respectively, to which are connected one end of each hole 21 of a series surrounding the bore 18. A space 29 between the valve members 23, 24 is connected to atmosphere through a passage 30. The valve members 23, 24 do not provide a complete seal between the chambers 33 and 34 so that under static conditions the pressures in all chambers tend to equalize and air pressure in a chamber 32 balances the load. In another arrangement, Fig. 2 (not shown), the plunger head is of substantially greater diameter than the plunger tube and the additional space around the latter communicates through ports in the head with the first liquid chamber. No floating piston is provided in the plunger tube. In another arrangement, Fig. 3 (not shown), the second liquid chamber surrounds the first chamber in which the plunger head works, the valve members and holes being interposed between the two chambers. In a further arrangement, Fig. 3 (not shown), the two liquid chambers are interconnected by a conduit in which a valve unit is interposed including two spring-loaded valves each having a stem slidable in a bore open to atmosphere. In any of the arrangements, the air and liquid may be separated by a flexible bag or diaphragm instead of a floating piston.
Patent GB-699859-A (GB)
Title: Apparatus for conducting a continuous body of fibres through a roller nip in textileprocessing machines
Inventor: METCALF WILLIAM JOSEPH WILD
IPC: D01H5/72
Filed: 1950-05-30
Abstract: 699,859. Preparing fibres for spinning; spinning machines. T.M.M. (RESEARCH), Ltd. May 15, 1951 [May 30, 1950; May 30, 1950], Nos. 13463/50 and 13464/50. Classes 120(i), 120(ii) and 120(iii) The invention relates to roller apparatus of textile processing machines of the kind in which a continuous body of fibres. is conducted through the nip of a yieldable pair of rollers which condense or compress the fibre body, as with the calender rollers of a carding engine, draw frame or combing machine, or which grip and draw the fibres forward, as in a draw frame or spinning machine; means is provided, independent of the rollers, which are effective to condense the fibres and control them in all lateral directions until they reach a position near to the point of closest approach of a pair of rollers, and thereafter positively to control the fibres axially of the rollers at least as far as the said point. As shown, Fig. 3, the calender rollers 1, 2 of a sliver-coiling apparatus are formed with narrow circumferential tongues 3, 4, between which the sliver is passed. The usual trumpet guide 13 is provided with an extension conductor 16 the chamfered end 17, of which is bifurcated; the inner surface 23 of each bifurcation lies close to the corresponding sides of tongues 3, 4 so as to positively guide the fibres into and through the nip of the tongues. Roller 1 is in fixed bearings, whilst roller 2 is mounted in a bracket pivoted at one end and urged by spring or other means towards roller 1. Where rollers 1, 2 operate an electric stop motion, at least the parts of the conductor which contact the rollers are made of insulating material. In a modification, only one roller is tongued and the bifurcations of the conductor are cut away in concave form so as to conform to the surface of the plain roller and restrict its working surface to the width of the tongue on the other roller. In the drawing head of a spinning frame, Fig. 11, a tubular conductor comprises two or more sections 35, 36 cut away to receive tongued drafting rollers 28, 29, 30, 31 and arranged telescopically to permit variations in the spacing of the rollers; in another arrangement a single tubular conductor is cut away to receive three pairs of tongued drafting rollers. In a further arrangement, Fig. 13, the fibre strand is delivered by travelling aprons 39, 40 to a condenser 41 having spaced side walls 42 co-operating with the tongues 37a, 38a of rollers 37, 38. Other arrangements utilize a single apron and a single tongued roller; also, the condenser may be provided with a detachable mouth portion which can be replaced by another of different length or shape if desired. In a still further arrangement, condensers such as 41 co-operate with successive pairs of drafting rollers and a channel-section conductor extends between the two guides.
Patent GB-259145-A (GB)
Title: Swabs for oil wells
IPC: E21B37/10
Filed: 1926-05-27
Abstract: 259,145. Porter, H. A. May 27, 1926. Buckets; relief devices.-A swab for raising liquid from oil wells comprises a fluted stem 11 provided with a head 12 for attachment to a lilting cable &c. The stem is surrounded by a sleeve 18 carrying upper and lower nuts 21, 25 between which a packing member 27 is mounted on the sleeve. The stem carries a relief valve 15 which normally seats on another valve 34a provided with axial and radial ports 35<a>, 36. The two valves are pressed together by an adjustable spring 48. During the descent of the swab, the liquid passes to the upper side through the space between the stem 11 and sleeve 18, and ports 24 in the nut 21. During the ascent of the swab, the valve 34a seats on the lower end of the nut 25 to prevent return of the liquid, and the flexible element 33 of the packer is pressed against the wall casing by the pressure of the liquid, which passes through holes 19 in the sleeve 18 into the space 54 and thence passes to the member 33 through holes 32 in the packer sleeve 30. Should the swab be overloaded, the valve 15 lifts from its seat on the valve 34<a>, as in Fig. 2, and the excess of liquid passes through the swab to the under side.
Patent GB-528396-A (GB)
Title: Improvements in or relating to the fixing of tubes in the walls of receptacles
IPC: F16L15/00
Filed: 1939-05-05
Abstract: 528,396. Pipe joints. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. May 5,1939, No. 13479. Convention date, May 19, 1938. [Class 99 (i)] A pipe 1 is fixed in a wall 4 of a receptacle by providing a screw thread on the pipe, the outer diameter and base of which lie on a cylinder and cone respectively, and a corresponding thread in the orifice of the wall 4, as shown. The threads may be effected on a lathe and by a thread-milling machine. The thread on the pipe may be formed on a collar and sleeve formed thereon or attached thereto, e.g. by welding.