baber/WOPTO huggingface dataset:
Patent GB-727961-A (GB)
Title: Improvements in or relating to hydraulic drawing presses
IPC: B21D24/00
Filed: 1949-04-01
Abstract: 727,961. Hydraulic presses. FIELDING & PLATT, Ltd., and ROWLES, R. V. June 28, 1950 [April 1, 1949], No. 8939/49. Class 69 (2). An hydraulic drawing press for the working of metals particularly for drawing solid ended metal containers such as shell or cartridge cases comprises two rams adapted to be operated alternately and means for controlling the supply of pressure liquid to the ram cylinders so as to produce different speeds of travel of each ram over selected portions of its operating and return strokes. The press may be operated by a variable delivery pump and provided with means for varying the delivery of the pump during the operating stroke of each ram in order to obtain a desired rate of approach of a tool carried by the ram towards the work and arranged during the return stroke of the ram to provide slower return speed during the removal of the tool from the work followed by completion of the return stroke at a desired higher speed. The drawing operation takes place at a slower speed than the approach. As shown the press comprises two cylinders B in each of which works a double-acting ram B1. Each ram carries at its lower end a tool C2 which co-operates with a die C1 to perform a drawing operation. Two pumps (not shown) are employed, one supplying liquid for the operating stroke and the other for the return stroke. This permits of employing different operating and return speeds. One ram descends while the other is raised. The pumps may be of variable delivery type. The pump delivery varying means may be actuated by tappets adjustably positioned along the line of travel of each ram. It is stated that the operating time may be reduced as compared to a mechanical press by the selection of the various operating speeds. The pump for the return stroke may be smaller than that for the approach stroke.
Patent GB-1458124-A (GB)
Title: Method and apparatus for measuring the concentration of particles suspended in a gas phase
IPC: G01N15/06
Filed: 1974-02-27
Abstract: 1458124 Detecting particle concentration electrically INSTITUT NATIONAL DE RECHERCHE CHIMIQUE APPLIQUEE 27 Feb 1974 [28 Feb 1973] 8971/74 Heading G1N The concentration of particles suspended in a gas phase is measured by passing the particle laden gas phase through a fluidified bed of balls or a spouted bed of balls and measuring the resultant current flow from the wall of the container containing the balls. The invention is based on the fact that if a container holds a fluidified bed of balls of different material to the container then due to triboelectrification effects between the balls and the container walls a steady charge state is obtained in which the walls are charged to an equal but opposite potential to that of the balls. If then the charge on the bed of balls is modified an equivalent current flows from the walls to earth or a measuring instrument to maintain the steady state. In one embodiment of an analyzer for measuring smoke and other particles in an effluent from a stack a stainless steel container 1a is provided with a bed of copper balls 5a of weight and diameter greater than that of the particles to be detected. A flow of air 2 is then passed into the bottom of container 7a through a metallic grating 4a and associated membrane 3a so that the balls become fluidified and reach a steady charge state with the container 1a. If the air-stream 2 contains particles then these become adhered to the balls 5a for a certain time and then are re-emitted to form an aerosal 6 above the balls and in the process modify the charge on the balls. This results in a current flow from the container via an amplifier to a recorder which current is proportional to the concentration of particles in the gas phase. The flow of air may be produced by sunction instead of blowing. Alternatively a spouted bed arrangement may be used, Figs. 3, 5 (not shown) and Fig. 4 in which a metal tube provided with a conical or hemispherical base is connected via a conventional lever actuated needle 12 valve 10 to an air supply. Air is blown through the valve 10 so that the metal balls form a spout 13 forming the upper portion of a central column of a system of balls in suspension which operate similarly to the arrangement of Fig.2. In both arrangements the containers are positioned in a Faraday cage. Two stages may be connected in series, Fig. 6 (not shown) with the first container earthed and the second connected to the measuring instrument, the beds having opposite polarity charges to increase the response. In addition Fig. 6 describes an arrangement of testing the device using an aerosol generator and a conventional photometric analysis device.
Patent GB-203290-A (GB)
IPC: F02M1/00
Filed: 1923-03-29
Abstract: 203,290. Akt.-Ges. f³r Patentverwertung. Aug. 31, 1922, [Convention date]. Addition to 198,992. No Patent granted (Sealing fee not paid). Fluid-actuated valves. - Modified means are provided for operating the valve described in the parent Specification for admitting light or heavy fuel mixture to the vaporizer, and controlling the heating of the heavy fuel mixture by varying the point of admission to an exhaust-heated passage. The valve 65 is operated from the throttle valve through a rod 80 and a spring 81 which bears against the valve arm 66, which is pivoted at 67 to the stem 68 of a dash-pot plunger 70. The valve is prevented from making a premature or too large a movement by a detent 73 which engages teeth 72 on the stem 68. The detent 73 is carried by a spring-loaded valve 75 which coacts with a seat at the entrance to a chamber 76 having a restricted air admission at 82, but is opened by suction transmitted from the vaporizer beneath the throttle valve by a pipe 78. The valve 65 is thus held against rotation until the suction in the vaporizer reaches a predetermined amount, and should the speed of the engine, and hence the suction fall, the detent re-engages the teeth to prevent further opening of the valve.
Patent GB-1567696-A (GB)
Title: Method of and an apparatus for producing containers
IPC: B29C53/48
Filed: 1977-03-03
Abstract: Apparatus for forming containers having a deformable tube and a closing cap attached to one end of the tube. A strip of deformable material is fed through a shaping tube and a mandrel axially positioned within the forming tube by means of an endless belt positioned within the mandrel and another endless belt positioned exterior of the mandrel. Welding means are provided to join the overlapped edges of the deformable material that has been shaped into a cylinder. Cutting means downstream of the welding means segment the welded cylinder into cylindrical tubes of desired length. A tube head is molded onto one end of each cylindrical tube.
Patent GB-288271-A (GB)
Title: Improved method for producing rails for railways and tramways of compound-steel
IPC: B22D7/02
Filed: 1928-03-26
Abstract: 288,271. Vereinigte Stahlwerke Akt.- Ges. April 8, 1927, [Convention date]. Rails with hard wearing surfaces are made by casting soft steel about an insert or inserts of steel containing chromium, nickel, manganese, silicon, titanium, carbon or other hardening material and rolling to the desired form, Fig. 8. In the case of grooved rails the hard metal need not be carried to the sides or to the bottom of the groove Fig. 13, in the latter case two inserts are required. Both hard and soft steel should contain some molybdenum to improve their weldability.
Patent GB-578151-A (GB)
Title: Improvements in high-frequency signal generators
IPC: H04J1/06
Filed: 1941-07-17
Abstract: 578,151. Valve generating circuits. HAZELTINE CORPORATION. July 17, 1941, No. 9075. Convention date, Sept. 30, 1940. [Class 40 (v)] A whole series of stabilized radio frequencies with equal frequency spacing are produced by heterodyning the selected outputs from two or more crystal-controlled oscillators, selection being effected either by switching-in any one of a series of crystals or by switching-in tuned circuits to select harmonics from a single crystal. Each frequency step of a lower-frequency oscillator corresponds to the whole range of ten steps of a higher-frequency oscillator so that decade indicators may be used. As shown, the smaller steps in frequency are provided by a series of crystals A1 ... A10 switched into the circuit of an oscillator valve 20 by an arm 31 under the control of an indicator drum 82. Oscillations of lower frequency are selected by a switch arm 59 which connects a number of condensers B1 ... B10 across a coil 53 so as to select particular harmonics of the oscillation generated by a crystal-controlled oscillator 40. The switch 59 is controlled by an indicator drum 83, and each step in frequency due to movement of the arm 59 corresponds to the whole range covered by the crystals A 1 ... A10. The outputs of the oscillators are mixed in a pair of valves 63, 64 being fed in push-pull to the grids and cathodes respectively. The anodes of the valves 63, 64 are joined in parallel to a broadly-tuned output circuit feeding an amplifier 76. The anode circuit of this amplifier is selectively tuned to pass a desired sum frequency by a switch 80 linked to the switch 59 and arranged to select one of the band-pass circuits C1 ... C10. The harmonic generator 40, or a following valve, may be arranged to have a limiting action so that a square-topped wave is produced rich in harmonics. Amplitude reduction of the higher harmonics may be countered by the use of an inductive output circuit 49 for the valve 40. In a modification, three generators are employed, that of the highest frequency having crystal selection and those of intermediate and lower frequency having harmonic selection. The two latter are mixed to produce sum frequencies which are then mixed with the first to produce the final frequency (Fig. 2, not shown). In a further modification, the first generator has a single frequency output which is mixed with the selected output of the second generator to derive difference frequencies. These are mixed with the selected output of the third generator to produce a desired sum frequency (Fig. 3, not shown).
Patent GB-181515-A (GB)
Title: Improvements in and relating to electric regulating systems
IPC: G05F1/00
Filed: 1921-03-24
Abstract: 181,515. British Thomson - Houston Co., Ltd., (General Electric Co.). March 24, 1921. Regulation, automatic systems and apparatus for. -The field winding of a dynamo-electric machine is provided with a plurality of resistances connected in parallel and a regulator is adapted to control simultaneously the effective value of a portion only of each resistance. When applied to a continuous-current motor for maintaining its speed constant, a coil of the regulator is connected across an auxiliary generator coupled to the motor and a device is provided for adjusting the value of the predeter. mined speed. The field winding 5, Fig. 1, of the exciter 4 of an alternator 2 is connected in series with a plurality of resistances 6, 7, 8 connected in parallel, and portions of these resistances are adapted to be shortcircuited by differential relays 9, 10, 11, the windings 13, 14, 15 of which are controlled by a vibrating regulator 12. The motor 30, Fig. 2, the speed of which it is desired to maintain constant, is coupled to an auxiliary generator 51 adapted to energize the coil 50 of a regulator 41. The field circuit of the motor contains a plurality of resistances 34, 35, 36 connected in parallel, and portions of these resistances are adapted to be short-circuited by differential relays 38, 39 and 40, the windings 42, 43, 44 of which are controlled by a vibrating regulator 41. Changes in the value of the predetermined speed are obtained by the operation of an arm 56 to vary the value of resistances 37, 52.
Patent GB-770019-A (GB)
Title: Improvements in or relating to a discharge nozzle
IPC: B60S1/48
Filed: 1955-03-29
Abstract: 770,019. Windscreen washers. BACHRACH , C., NEUFELD, L. C., MORGAN, W. C., McGINN, S. F., and GIMBEL, J. W., [trading as DELMAN CO.]. March 29, 1955, No. 9184/55. Class 138(1) [Also in Group XXIX] The body 24 of a windscreen washer nozzle is secured to the underside of a hood 14 of a vehicle and has axially bored ball members 26 arranged within tubular members 33 fixed within the outer ends of passages 32 fed with liquid from a main passage 31. The ball members are frictionally and adjustably held within the tubular members and project slightly therefrom. Liquid outlet openings 44 are provided in the hood. Alternatively the nozzle may be secured below the fixed engine cowl which has openings for the liquid jets. The nozzles are fed with liquid from a container 22, Fig.. 2, via a 3-way valve 48 on the container and a tube 49. A pump 18 is operated by a foot-operated plunger 46 on the vehicle floorboard, and when the plunger is depressed liquid is forced through the nozzles and when released liquid is drawn from the container into the pump. Specification 766,029 is referred to.
Patent GB-168090-A (GB)
Title: Improvements in means for controlling electrically operated mechanism
IPC: H02K23/44
Filed: 1920-03-30
Abstract: 168,090. Armstrong, Whitworth, & Co., Ltd., Sir W. G., Robertson, F. L., Lee, H. W., and Lacon, R. March 30, 1920. Mountings.-In electrically-operated mechanism the driven shaft is controlled by a combination embodying a constant-speed generator having movable poles actuated by a hand-wheel device and independently movable pole-shoes which are displaced by rotation of the shaft. In Fig. 1, the application to a gun controlsystem is shown wherein the initial movement of the handwheel 36 causes current to flow from the generator 25 to the driving motor 28, which current continues to flow during further motion of the wheel and ceases when the wheel stops, while if the current supply fails the handwheel itself rotates the shaft 44 operating the gun. The constant-speed motor 24 drives generators 25, 26 which have pole systems as shown in Fig. 1 and respectively supply current to the armatures of the elevating motor 28 and a training motor not shown. The mains 55 feed the motor 24 and a constantly running motor 29 which drives the controlling generator 30 embodying a hunting device in the form of movable poles 15 and pole tips 5 shown in Fig. 2. The poles 15 are toothed-geared at 34 to a wheel 35 fast with a hand-wheel 36 loosely mounted on a shaft 37. This shaft is chain-geared at 39 to the rotary pole-shoe frame of the generator 30. A projection on the shaft 37 limits the relative movement of the poles 15 and the shoes 5 to 90‹ in either direction. The gun quadrant 51 is worm-geared at 50 and 47 to the driving shaft 44 under control. This shaft is bevel-geared at 52, 43 to the motor 28 and the shaft 37. In operation, movement of the handwheel moves the poles 15 from their normal position midway between the pole-shoes 5, Fig. 2, and causes the armature 30 to generate current. This current excites a field coil 16<a>, Fig. 5, in the generator 25 producing fields which by reaction with those of the rotatably-mounted poles 15<a> move these poles against the action of a spring with respect to the fixed pole-shoes 5<a> and cause a resultant flux in the armature which determines the direction and speed of the motor 28 and thereby those of the gun elevation. The training control circuit acts similarly. The Provisional Specification states that the system may be applied to continuous or alternating-current systems, that magnetic clutches or the like may be employed to counteract the effects of momentum of the moving parts, and that for small equipments the motorgenerator may be omitted, the hand-wheel being connected to the pole-system of the main generator, the pole tips and brushes of which are rotated by the shaft which is geared to the gun trunnions.
Patent GB-733625-A (GB)
Title: Improvements in or relating to control of liquid heaters
Inventor: SHAW EDWARD DENNIS LESLIE
IPC: F24H9/20
Filed: 1952-04-17
Abstract: 733,625. Fluid-pressure servomotor control systems. EAST MIDLANDS GAS BOARD. April 17, 1953 [April 17, 1952], No. 9621/52. Class 135. A liquid heater includes a container for liquid to be heated, a control system arranged to shut off the heater on the occurrence of a predetermined low level of liquid in the container, additional (main) heater control means, and a resetting device for the controller which is operable only when the main heater control means has been actuated to prevent operation of the heater. In an embodiment, the shorter arm 17 of a U- tube 17, 18 communicates with the lower portion of the liquid container (not shown) which is being heated by gas burners. The gas supply flows from a main 25, past a manually-operated stop-valve 26, past a safety cut-off, diaphragmactuated, lift valve 28 or a needle valve, through an air intake 14, and so to the burners. A branch 21 is led off from the gas supply from between the valves 26, 28, and the end thereof is bent down at 23 to act as a dip tube projecting below the surface of the liquid in the longer arm 18 of the U-tube. The upper end of arm 18 opens into a box 20 from which a conduit 22 leads into the actuating chamber of valve 28. When the liquid in the container falls below the safety level, the liquid in arm 18 of the U-tube will fall also to a level which will allow gas in the dip tube 23 to bubble up into box 20 and so through conduit 22 to valve 28 where it will act on the diaphragm and close the valve to shut off the gas supply to the burners. To reset the apparatus, valve 26 is turned to the closed position in which an atmospheric leak passage in the valve is put into communication through a conduit 40 with the actuating chamber of valve 28 so that the gas in that chamber can flow to exhaust. Valve 28 will then open due to the pressure of the gas supply when valve 26 is again turned to the open position. The height of the dip tube in arm 18 may be adjustable, and the main shut-off and atmospheric leak passages in valve 26 may be incorporated in separate, but interconnected, valves.
Patent GB-121112-A (GB)
Title: Improved Method of and Carburetter for Operating Internal Combustion Engines by Mixtures of Liquid and Gaseous Fuels.
Inventor: SILBERNAGEL ADOLF
IPC: F02M25/10
Filed: 1918-06-07
Abstract: 121,112. Silbernagel, A., (Assignee of Kraus, L.). Nov. 24, 1917, [Convention date]. Materials, a c t u - ating.-A spray carburettor has two fuel inlets, one for a liquid, preferably petroleum, and the other for acetylene. The carburettor casing is in two parts A, W united by flanges III, IV, the upper part containing the throttle valve B, an adjustable stop H therefor, and a nozzle Z for liquid fuel. The lower part comprises, in its airinlet end, a perforated disk R which carries a nozzle E for the admission of the acetylene. This nozzle is controlled bv a spring-loaded valve D carried by a frame K axial adjustment of which varies the force in the loading-spring J. The frame is secured after adjustment by screws G. Air, which may be heated, enters through adjustable apertures F, F<1>, and heated or compressed air may be admitted through the perforated disk R. The admission of air and acetylene is regulated by adjustable disks C with apertures X, secured by a nut u to the spindle of the valve D, which is lifted by the disks when suction occurs. The Specification as open to inspection under- Sect. 91 (3) (a) mentions also the use of coal gas. This subject-matter does not appear in the Specification as accepted.
Patent GB-730829-A (GB)
Title: Improvements in or relating to light reflectors
Inventor: HEATH BENJAMIN GEORGE
IPC: F21V17/04
Filed: 1953-04-07
Abstract: 730,829. Light reflectors. FLUOREL, Ltd. April 7, 1954 [April 7, 1953], No. 9445/53. Class 75 (2). A reflector of spun aluminium polished on its inner surface and provided with spring tongues 2 for gripping an electric light bulb 4 is stepped in profile and decreases in diameter from one end to the other, the step 6 at the wider end being of curved profile to direct the light into a beam. The step 6 and the adjacent step 7 are of parabolic curvature. The tongues 2 are of heat resisting spring steel and locate the light bulb 4 so as to leave a ventilating gap 5 between the bulb and the narrow end of the reflector. The reflector is spun from a ring of pure aluminium and is polished by mechanical polishing followed by electrolytic polishing.
Patent GB-546805-A (GB)
Title: Improvements relating to abrasive articles and their manufacture
IPC: B24D18/00
Filed: 1941-07-25
Abstract: 546,805. Making abrasive laps. NORTON GRINDING WHEEL CO., Ltd. July 25, 1941, No. 9472. Convention date, Oct. 2, 1940. [Class 60] An abrasive lap particularly for grinding lenses comprises a part-spherical grooved metal backing 10 having an abrasive layer bounded by spherical surfaces of different radii so that the layer is thicker at the perimeter than at the centre of the lap. The backing may be made by pressing and may be of brass, copper, bronze, aluminium or steel. The grooves may be either concentric or spiral and are preferably undercut to improve the locking of the abrasive layer 20, which may consist of diamond abrasive mixed with a bond. The latter may be of sintered metal consisting of 20 per cent. of tin and 80 per cent. of copper, or the metal bonds described in U.S.A. Reissue Patent 21,165 may be used. Alternatively the bond may be of synthetic resin such as phenol formaldehyde, or one of the polyhydric alcohol-polybasic acid resins such as glycerol phthalate or aniline formaldehyde condensed in the presence of a strong acid with or without modifying ingredients or polymerized methyl methacrylate preferably hardened with an interpolymer thereof. The metal back 10 may be placed on a plate support 13 surrounded by a ring 12 and the abrasive mixture 20 shaped by rotating an arcuate-edged scraper 21. A top plate having an operative surface of different radius from the backing layer is then applied and the mixture pressed into the backing ring and the product placed in an oven to mature or sinter the bond. Finally a central hole 26 may be formed in the lap. A tool having a concave operative face may be formed in a similar way to the convex tool shown in Fig. 4, the abrasive layer being in this case also thicker at the edges than in the centre.
Patent GB-1454128-A (GB)
Title: Pneumatic drive using revaporised liquefied-gas
IPC: F01K25/10
Filed: 1975-03-07
Abstract: 1454128 Revaporized liquefied-gas power units COAL INDUSTRY (PATENTS) Ltd 22 May 1975 [10 June 1974 (2) 7 March 1975] 25634/74 25635/74 and 9572/75 Heading F4P [Also in Division B7] A revaporized liquefied gas drive comprises a liquefied-gas vessel 1 with valve means for maintaining a preselected pressure therein, a passage 2 for feeding liquefied gas to a liquid pressure intensifier 4 and gas to a receiver 10, a passage 16 for feeding gas from receiver 10 to the intensifier 4 to actuate the intensifier 4 to increase the pressure of the liquefied-gas passed thereto, and a heater 22 for converting the pressure intensified liquefied gas to the gaseous state. The gas passed to receiver 10 is vaporized in heater 8. After vaporized gas from heater 22 has been fed to high-pressure cylinder 28 of motor 24 it is reheated at 23 before passing to low-pressure cylinder 32 of motor 24. The drive can be used in a rail vehicle (Fig. 2, not shown), the receiver 10 can accept its gas direct from the vapour space of vessel 1 (Fig. 3, not shown), and the gas to intensifier 4 need be used only for starting, further operation being provided by exhaust gases from the motor (Fig. 4, not shown).