baber/WOPTO huggingface dataset:
Patent GB-655216-A (GB)
Title: Improvements in or relating to electric discharge tubes
IPC: H01J1/94
Filed: 1948-08-23
Abstract: 655,216. Thermionic valves. PHILIPS ELECTRICAL, Ltd. Aug. 23, 1948, No. 22182. Convention date, Aug. 26, 1947. [Class 39 (i)] An electric discharge tube having one or more flat electrodes and a cathode with a discshaped emissive surface is characterized in that the cathode is mounted on a cylindrical body which has a wall made at least in part of perforated or expanded metal and which is secured in a metal tube sealed in the envelope. In the thermionic valve shown in the Figure the cathode comprises an emissive disc 5 mounted on a tube 6 within which is positioned a heater 7. The leads 8 for the heater are sealed in a metal cylinder 10 by a glass bead 9. The tube 6 is supported by a cylindrical body 11 preferably made of " stretching material," i.e. metal sheet provided with very small cuts which by stretching the metal sheet are elongated to form apertures. The cylindrical body 11 is sealed to the cylinder 10 and also to the copper tube 13 sealed to the envelope 12. In assembly the cathode is sealed in the cylindrical body 11 and the cylinder 10 carrying the heater is introduced into the cylindrical body 11 until the heater is correctly positioned. The whole is then introduced into the tube 13, correct position between the cylindrical body 11 and the tube 13 being maintained by stretching or compressing the cylindrical body 11. The cathode 5 is then correctly positioned relative to the grid 3 by using a microscope. Sealing is accomplished by heating and thus melting solder or enamel previously inserted by rolling in the perforations of the cylindrical body 11. A thin foil 14 may be arranged at the top of the cylindrical body 11 to reduce heat radiation from the tube 6 and to reduce high-frequency resistance. The end of cylinder 10 may be closed by a ceramic member 16. One of the heater leads 8 may be connected to the cylinder 10.
Patent GB-1462921-A (GB)
Title: Flow-divider valve
IPC: F15B13/02
Filed: 1974-05-17
Abstract: 1462921 Flow divider valves for steering and auxiliary circuits AISIN SEIKI KK 17 May 1974 [21 May 1973] 22249/74 Heading B7H A flow divider valve 30 is connected to supply a power steering circuit 20 and brake booster 10 so that both may be used simultaneously or if only one device is in use, supply to the other device is reduced but is such that the latter may be readily activated. In one embodiment, Fig. 1, the valve includes a body 50 dividing a bore into chambers 51, 52 having outlets 33, 32 to the booster and power steering respectively. Chamber 51 is connected to fluid supply inlet 31 via bores 47, 48 and chamber 52 is connected to inlet 31 by bores 45, 46, a chamber 44 and an orifice 37 in a movable body 38. The body 38 is movable against a spring 39 towards or away from a needle element 36 to vary the flow to chamber 52. The body 38 is moved in response to pressure in chambers 41, 42 to either side of an annular piston on the body 38 which are connected respectively to the steering and brake circuits. With pump 1 supplying fluid and devices 10 and 20 in operation fluid passes to both chambers 51, 52 and body 50 assumes a position in which both outlets are supplied. If the booster 10 is actuated the pressure increase in line 21 is communicated to chamber 42 via groove 65 and bore 66 thus reducing flow to chamber 52; at the same time the pressure increase in chamber 51 causes movement of body 50 to the right to restrict outlet 32. On operating the steering system 20 the increased pressure in chambers 41 and 52 reverses the movement of body 50. In a second embodiment Fig. 2, the outlets 73, 74 to the respective working circuits 20, 10 are controlled by a body 80 which contains a movable body 90 mounting a needle element 93 and a body 84 defining an orifice 85. Flow between chambers 70A, 70B is controlled by movement of body 90 and element 93 caused by pressure differentials in chambers 91, 92.
Patent GB-1151723-A (GB)
Title: Polymer purification.
IPC: C08G69/46
Filed: 1966-05-19
Abstract: 1,151,723. Removal of monomer from polyamides. FARBENFABRIKEN BAYER A.G. 19 May, 1966 [21 May, 1965], No. 22285/66. Heading C3R. Monomeric and oligomeric materials are removed from a high M.W. polyamide by passing it in molten form into a heated tube which is under vacuum and in which a screw conveys it along the internal wall of the tube to the outlet point, the central portion of the tube remaining free to permit monomeric and oligomeric material to distil off and be discharged. Polyamides specified include polycaprolactam, copolyamides, e.g. a condensate of caprolactam and hexamethylene diammonium terephthalate, polyesteramides and copolyamide/polyureas. They may be of 2À5-4À0 reduced viscosity. The temperature of the tube may vary along its length, e,g. it may rise from inlet to outlet. It may be between 220‹ and 320‹ C. The pressure in the tube may be 0À001-10 mm. Hg. The tube may be at any inclination, e.g. vertical or horizontal. An additive may be introduced into the melt during distillation, e.g. a concentrate of TiO 2  in the polyamide. In a particular embodiment (Fig. 1) the polyamide melt enters at 4, the monomeric and oligomeric material is drawn off at 8 and the polymer discharged by gear pump 6. In another embodiment (Fig. 2, not shown) the vapour outlet 8 is next to 4 and the treated polymer is discharged by a second screw which is conical in shape and the axis of which is an extension of the axis of the main screw.
Patent GB-294962-A (GB)
Title: Improvements in or relating to electric transformers
IPC: H02M7/06
Filed: 1928-08-01
Abstract: 294,962. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts Ges.). Aug. 2, 1927, [Convention date]. Polyhase transformers.-In a three-phase to twelve-phase transformer for feeding multianode rectifiers in which a set of primary windings in open star connection is connected in series with a second set of primary windings delta-connected, the secondary windings are connected in double zig-zag, Fig. 3, or in single zigzag, Fig. 4, or in polygon, Fig. 5, in order to obtain complete compensation for the ampereturns of both sets of primaries. The cores for the two sets of windings may be arranged separately or combined as shown in Fig. 6 in which the arrangement of primary windings is indicated. The central limb m carrying the difference flux may be of reduced cross-section.
Patent GB-796121-A (GB)
Title: Improvements in or relating to a rotary perforator for strip material and also to a method of broaching apertures in perforator dies
IPC: B26F1/10
Filed: 1956-07-19
Abstract: 796,121. Perforating apparatus. EASTMAN KODAK CO. July 19, 1956 [July 26, 1955], No. 22358/56. Class 31 (2). [Also in Group XXII] A rotary perforator for strip material comprises a pair of oppositely-rotating members 16, 17, Fig. 3, a plurality of radially-arranged punches 53 extending from the member 17, a plurality of radially-arranged dies 72 in the member 16 each having a radially-extending aperture 74 which is undersize with respect to the punches, means fixed to the member 17 and engaging the punches 53 for fixing their position with respect to the dies 72 at a distance such that the punches approach but cannot enter the dies, and means operatively engaging each of the punches for moving them radially into and through the aperture 74 aligned therewith to broach the aperture. The strip moves continuously from a supply reel passing between rollers 14, 15 over the member 16 and on to the member 17, around idler roller 18 and thence to a take-up spool. The rotary member 17 is keyed on a shaft 28, Fig. 4, journalled in bearings 29, 30 mounted in a sleeve 31; the rotary member 16 is similarly mounted on a shaft 32 journalled in a sleeve 35. The rotary member 17 comprises a flange 45, spacers 46, a ring 48 secured to the flange, and a coverplate 50 having an internal shoulder 51; the punches 53 are arranged between the spacers 46 and are connected to the ring 48 by screwed studs 57, Figs. 4 and 6, having threads of opposite hand. The rotary member 16 comprises a flange 65, spacers 66, a ring 68 secured to the flange, and a cover-plate 70; the dies 72 are mounted between the spacers 66. After aligning a punch with its die by means of a hand wheel, the undersized die aperture 74 is broached to the exact size by forcing the portion 56 of the punch through the aperture by means of the screwed stud 57. The punch is then returned by reversal of the stud, until it abuts the shoulder 51 of the cover-plate 50. The broaching operation is repeated until each of the dies has been sized by its respective punch. When regrinding of the punches or dies becomes necessary the cover-plate 50 or ring 68 is replaced by one having an increased diameter corresponding to the amount of material removed by grinding. During the perforating operation, the slugs 5, Fig. 6, are pressed out of the strip 10 into the die apertures and removed therefrom by radial extensions 77, Fig. 3, on a rotary plate 76 and suction. In a modification (Fig. 7, not shown), the punches are adjusted outwardly by wedge members which are caused by screws to engage the inclined ends of the punches; after adjustment to the correct position the punches are locked by a set-screw. The dies are similarly adjusted by the engagement of a chamfered ring with inclined faces on the dies. Specification 534,443 is referred to.
Patent GB-600417-A (GB)
Title: An implement for stringing runner beans and the like
IPC: A47J17/06
Filed: 1945-08-31
Abstract: 600,417. Cutting and slicing vegetables. WALLIS, M. F. Aug. 31, 1945, No. 22465. [Class 5(i)] An implement for string- ing runner beans comprises a handle a formed in the head of which is a guide groove b across which the cutting edge of a blade c projects like the blade of a carpenter's plane. The V- shaped guide groove b is arcuate along its length, and the blade c is arranged across the groove to string beans pulled through the groove. The beans are sliced by laying them on a flat surface and drawing across them disc knives g spaced by distance pieces and mounted on a spindle h carried between projecting lugs on the handle a.
Patent GB-242577-A (GB)
Title: An improved warp beam with piecing or knotting cloth for looms
IPC: D02H13/28
Filed: 1925-09-10
Abstract: 242,577. Soc. Anon. A. Saurer. Dec. 17, 1924, [Convention date]. Attaching warps to beams.-The piecing-cloth f of a warp beam a, having the usual hollow b in which the knotting-end c of the warp lodges, is provided with a covering member e so that, during winding, it bridges s the hollow b, as shown in Fig. 3.
Patent GB-359942-A (GB)
Title: Improvements in fire escapes
IPC: A62B5/00
Filed: 1930-07-28
Abstract: 359,942. Fire-escape ladders. HETZELBERGER, F., 6, Zeitblomstrasse, Ulm-on-Danube, Germany. July 28, 1930, No. 22744. [Class 47 (i).] A telescopic fire-escape ladder fitted with a mechanically-operated lift has a guide track for the lift 12 formed in rail sections 3 .. 6 corresponding to the sections of the ladder. The rails are secured, all in the same plane, to the braces 1, 2 of the ladder sections. The lower ends of the rail sections 4, 5, 6 are curved, Fig. 3. and these curved portions 7, 8, 9 are of Z-section, Fig. 7. The lift is mounted on a frame 11, Fig. 5, which has four sets of guide rollers 10, 14, 15 for engaging the rails, as shown in Fig. 7. The rollers are mounted on carriers 13 pivoted to rods 16 pivoted to the frame 11 and to rods 17 having a pin-and-slot connection 18 with the frame. Opposite pairs of carriers are forced apart by springs 19 in telescopic sleeves 20, this arrangement allowing the rollers to accommodate themselves to the varying gauge of the rail sections. The curved portions 7, 8, 9 of the rails facilitate passage from one section to the next. The lift 12, Fig. 6, is fitted with climbing rungs 21, and has its floor 22 hinged to open upwardly. The lift is operated by a cable 23 and a winding drum 25 driven, for example, from the ladder gear box 27 through bevel gearing 28, 29.
Patent GB-1256091-A (GB)
Title: Improvements in or relating to rotary electric machines
Inventor: BROADWAY ALEXANDER RICHARD WIL
IPC: H02K17/14
Filed: 1968-05-14
Abstract: 1,256,091. Induction motors. NATIONAL RESEARCH DEVELOPMENT CORP. 14 May, 1969 [14 May, 1968], No. 22799/68. Heading H2A. The self-cascaded induction motor according to Specification 1,155,743 is modified by increasing the number of rotor bars so as to decrease the leakage reactance of the rotor winding. As shown in Fig. 6, U-shaped bars 2, 3, 4 are fitted in slots between the bars 1 of the squirrel cage and connected to one of the end rings. In another embodiment, Fig. 7 (not shown) an eleven-bar squirrel cage has a single U-shaped bar between each pair of bars. Such a winding, when subjected to a 6-pole field, produces a 22-pole cascade speed. Examples of stator windings are also given. Fig. 8 (not shown) illustrates a 3-phase winding providing two parallel paths per phase at one pole member and a multi-phase short-circuit at a second pole member. As in Specification 1,155,743, the stator winding may be D.C. excited at the second pole member to produce synchronous operation and pole-charging may be effected by pole-amplitude-modulation, Figs. 10 and 9 respectively (not shown).
Patent GB-1107623-A (GB)
Title: Improvements relating to control arrangements
IPC: H02P1/58
Filed: 1965-05-28
Abstract: 1,107,623. Control of several motors. LICENTIA PATENT-VERWALTUNGS G.m.b.H. 28 May, 1965 [28 May, 1964], No. 22833/65. Heading H2J. In a sequential switching circuit for a number of loads, such as motors, control is effected by means of a push-button b2. When the pushbutton switch b2 is open, energization of relays dl, d<SP>1</SP>1, is blocked by rectifiers n12, n<SP>1</SP>12, which are poled oppositely to diode n1. Closure of switch b2 energizes the relays d1, d<SP>1</SP>1, as well as time delay relay d13. If the switch b2 is immediately reopened, the relay d13 reopens but relays d1, d<SP>1</SP>1, are held by windings d12, d<SP>1</SP>12 which are energized through rectifiers n11, n<SP>1</SP>11, and contacts of load relays 1c, 1c<SP>1</SP>. Relay d2 is energized through contacts c13 when push-button switch b2 is reclosed. The relays having main and holding windings may be replaced by two relays. A number of motors may be started in sequence by time delay relays which are connected to the voltage supply through diodes after actuation of relays d11, d21, and, after expiry of their delay period, connect the next motor to the supply. Signals lamps may be used to indicate the condition of the load relays.
Patent GB-470671-A (GB)
Title: Improvements in and relating to hydraulic operated brakes
IPC: B60T11/32
Filed: 1936-08-20
Abstract: 470,671. Cut-off valves. SCHNEIDER, J., and PINGET, M. Aug. 20, 1936, Nos. 22955 and 22956. Convention dates, Aug. 20,1935 and July 29, 1936. [Class 135] [Also in Group XXXIV] A device interposed in each pipe leading from the master cylinder of a hydraulic brake system comprises a piston adapted to cut-off the pipe from this cylinder when the brakes are applied and externally operable mechanical means for returning the piston from its cutoff position when due to a leak in the pipe, it does not do so when the brakes are released. A pair of devices is shown each comprising a cylinder connected to the master cylinder at 1 and to one of the pipes leading to a brake operating cylinder or cylinders at 13. The passage 1 is connected by passage 11 to the upper side of a piston 3 and normally also to the lower side by a restricted passage 12 and passages 10 in the piston. When the brakes are applied the piston moves downwardly against the resistance of a spring 5 sufficiently to cut off the connection between the two sides of the piston, but if there is a leak in the pipe 13 the piston moves to the bottom of the cylinder where it is locked by a keeper 7 which springs into a recess 9, or by spring-pressed balls. After the leak has been repaired the piston is returned by a screwed spindle 15 or by a slidable rod.
Patent GB-172068-A (GB)
Title: Improvements in or relating to machine guns
IPC: F41A3/68
Filed: 1920-08-04
Abstract: 172,068. Dawson, Sir A. T., Buckham, Sir G. T., and Larsson, C. A. Aug. 4, 1920. Machine guns.-The rear cover A<2> for the top of the mechanism casing A of a Vickers' gun is mounted on a longitudinal hinge or pivot a<2> and is fastened by one or more catches B. Fig. 6 shows a catch comprising a bell-crank lever one arm of which has a pair of claws b engaging recesses a in the side plate of the casing, the other arm b<3> being lifted against the action of a spring B<3> to release the claws and allow the cover to be turned to the position shown in chain lines. Fig. 4 shows a modified catch the claws of which engage the outside of the casing and are released against the action of a plate spring B<1> by a finger lift-piece b<1> and a thumb press-piece b'.
Patent GB-1333190-A (GB)
Title: Semiconductor devices
IPC: H01L23/051
Filed: 1971-04-19
Abstract: 1333190 Cooling semi-conductor devices ALLMANNA SVENSKA ELEKTRISKA AB 19 April 1971 [5 March 1970] 23060/71 Heading H1K The thyristor 50 shown is placed in a sealed space between two cooling parts 34, 35 which are joined (and spaced) by insulating bolts 42. Contact is made to the main electrodes 51, 52 of the thyristor by flexible metal walls 36, 37 which are held against the electrodes, to provide thermal and electrical contact, by the pressure of the liquid or gaseous coolant flowing (continuously or intermittently) through the cooling parts 34, 35. In the modification of Fig. 2 (not shown) the need to seal the space between the cooling parts is obviated by providing a flat housing for the diode element, the housing consisting of two flexible dished metal plates connected by a ceramic annulus. Fig. 1 (not shown) depicts a diode in a metal and ceramic housing in which one side only of the semi-conductor element is cooled, the coolant flowing through a chamber defined by one of the terminals and a metal wall member connected thereto by a flexible metallic bellows. In various arrangements the semi-conductor body may or may not be provided with metallic contacts.
Patent GB-940739-A (GB)
Title: Improvements in or relating to transistor voltage converters
IPC: H05B41/282
Filed: 1960-07-01
Abstract: 940,739. Transistor oscillator circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 1, 1960 [July 4, 1959], No. 23118/60. Heading H3T. [Also in Division H2] A converter comprises an oscillator having at least one transistor, an under-critically damped resonant circuit coupled to the or each transistor, and a non-linear network associated with the or each transistor arranged to feed back a sharp cut-off pulse during the period when the current in the emitter-collector path of the associated transistor is zero. A push-pull inverter circuit comprises two transistors 1, 2 in the emitter-collector circuits of which is connected the centre-tapped primary 4 of a transformer 3. The D.C. supply 8 is connected between the two emitters, and the centre tap of the transformer, and is shunted by a potential divider 9, 10. The output winding 5 of the transformer is connected to a tuned load 15 and to the primaries 16, 17 of two saturable transformers 13, 14 connected in series with the load, the secondaries 11, 12 being connected in series with feedback windings 6, 7 respectively on transformers 3, to the respective baseemitter circuits of the transistors. The transformers 13, 14 are arranged to saturate at low values of current, so an output is only produced in the secondary winding 11 or 12 as the primary current, which is sinusoidal due to the tuned load, passes through zero. Thus, a short pulse is produced, which cuts off one or other of the transistors. In a second embodi ment, Fig. 2 (not shown), the primary windings of the transformers are included in the collector circuits of the transistors and the secondary windings are connected between the voltage divider 9, 10 and the feedback windings 6, 7. The load may comprise a series arrangement of inductance 20, capacitance 19 and resistance 18, Fig. 4 (not shown), or may also include a shunt path comprising inductance 21 and capacitance 22, Fig. 6. One or other of the capacitances may be omitted and the resistor 18 may be replaced by a luminescent tube 18<SP>1</SP>, Fig. 7, the cathodes of which are connected to a further capacitor 22<SP>1</SP>. If the auxiliary transformers are included in the primary circuit of transformer 3, and the capacitor 22 omitted, the inductance 21 may be provided by the transformer 3 by providing an air gap in its core. Specification 909,969 is referred to.
Patent GB-1453020-A (GB)
Title: Scanning system including a holographic spinner
IPC: G02B26/10
Filed: 1974-05-23
Abstract: 1453020 Optical scanning PERKIN-ELMER CORP 23 May 1974 [29 May 1973] 23132/74 Heading G2J A line scanner e.g. a high resolution high bandwidth laser scanner comprises Fig. 9 means 48 for producing a beam of e.m. radiation; a spinner 60 located in the path of the beam to redirect at least a portion of the beam, and at least one hologram secured to the spinner for rotation therewith and positioned to receive the radiation and reconstruct an image e.g. a spot on film 62. Facet surface and angular errors can be tolerated and no lens is needed.  In one form Fig. 2 the spinner has a reflecting pyramidal surface 18 surrounded by a transparent cylindrical tube 20 to the outer surface of which is attached a hologram 12 opposite each facet of the pyramid. The hologram 12 is pre-made using an object beam from a point source and a reference beam which beams have similar wavefronts and intersect 12 at the same spatial orientation. In a modification Fig. 3, (not shown) the holograms are sequentially exposed on photo-sensitive material applied to the outer surface of the tube. The object beam falls on the material from outside while the reference beam is reflected from the surface of the spinner (which may be a cone, pyramid or hemisphere), through the tube 20 and on to the material. In another embodiment Figs. 4, 5 (not shown) an axially symmetrical surface is ground into a solid glass cylinder mounted on a rotatable shaft. The surface may be given a reflective coating. Photosensitive material is deposited on the outer surface of the cylinder and the holograms are made as for Fig. 3. In a still further embodiment Figs. 6, 7 (not shown) the photo-sensitive material is applied directly to the surfaces of a six-sided pyramidal spinner. Both object and reference beams arrive from outside the spinner. In a modification Fig. 8, (not shown) a spinner of good quality optical glass is used and the object beam passes through the spinner to interfere with the reference beam from outside to form a thick hologram. Types of holograms which may be used in appropriate embodiments are: thin transmission (amplitude or phase); thin reflection (phase); thick transmission or reflection (amplitude or phase) and blazed (phase). Types of recording materials usable are: silver halide emulsions; dichromated gelatines; thermoplastic-photo-conductor; photo-resist and photopolymer.