baber/WOPTO huggingface dataset:
Patent GB-718833-A (GB)
Title: Improvements in or relating to time division multiplex transmission systems
Inventor: FLOWERS THOMAS HAROLD
IPC: H04Q11/04
Filed: 1952-05-20
Abstract: 718,833. Automatic exchange systems. POSTMASTER GENERAL. May 15, 1953, [May 20, 1952], No. 12781/52. Class 40 (4). [Also in Group XL(c)] In a time-division multiplex transmission system a first common path having N channels each of which may or may not be occupied is connected to a second common path at each J<SP>th</SP> channel time position where J is prime to N so that there appears on the second path a pulse train corresponding to each pulse train on the first path but having a lower repetition frequency. This arrangement is used for the metering path HI, H2 of a multiplex selector having a speech path H. Lower grade receiving equipment can thus be used for the metering path which carries simple on-off metering pulses. The inlet S1, S is connected to the desired outlet T1, T by applying to the modulations M1, M a pulse train Pn corresponding to the times at which distributors MX1, MX connect the outlet T1, T to the speech and metering paths H, H2 respectively. When a positive metering pulse which is a relatively long pulse is applied to a coincidence circuit comprising rectifiers W 1 ... W4 in the modulator M, a series of pulses is passed over the first common path H1 in the time channel Pn of the selected outlet T1, T to a coincidence circuit G comprising rectifiers W5 ... W8. Each J<SP>th</SP> channel time position a pulse P is applied to the circuit G and when coincidence occurs a blocking oscillator V1 feeds a relatively long positive pulse less than the spacing between pulses P to the second common path H2. At the receiving apparatus MX of the selected outlet, a negative timing pulse is applied to one plate of a condenser C6 at the same time as a positive pulse from path H2 is applied to its other plate. Thus at the end of the negative pulse a large positive pulse is applied to a gasdischarge tube V2 whose anode is connected to a source of A.C. V2 fires and is extinguished by the A.C. once for each pulse. Thus for each metering pulse applied to the inlet S, tube V2 conducts several times at a frequency sufficient to ensure that a meter T connected in the cathode circuit operates once only for each metering pulse.
Patent GB-1413417-A (GB)
Title: Optical apparatus
IPC: G01J1/36
Filed: 1973-03-16
Abstract: 1413417 Optical apparatus LKB-PRODUKTER AB 16 March 1973 [24 March 1972] 12900/73 Heading G2J Apparatus for periodically displacing a light beam from a first path to a second path comprises a rotatable annular member having an axial bore whose end surfaces are provided with diametrically opposed reflecting surfaces. As the annular member passes through a certain angular position, light travelling along the first path is reflected at both reflecting surfaces and emerges along the second path. As shown in Fig. 2 the annular member comprises four sectors 9A-D; two opposite sectors 9A, 9C have reflecting surfaces, one sector 9D transmits light and the fourth sector 9B does not transmit light. An application of the apparatus is shown in Fig. 1. Light from sources 1, 2 passes through filters 3, 4 which transmit only wavelengths # 1 , # 2  respectively. The filtered light passes through slits 11, 12 and impinges on the apparatus 9 which directs light from each source alternately through two absorption flow cells 5, 6 to a photo-detector e.g. photo-multiplier 7. If the apparatus 9 is rotated clockwise as viewed from the left the sequence is: (a) # 1  is blocked; # 2  is doubly-reflected through cell 5 ; (b) # 1  is blocked; # 2  is transmitted through cell 6; (c) # 1  is doubly reflected through cell 6; # 2  is blocked and (d) # 1  is transmitted through cell 5; # 2  is blocked. The sector 9D which transmits light may be provided with a filter which absorbs as much light as the two reflecting surfaces.
Patent GB-761908-A (GB)
Title: Improvements in or relating to the method of welding together two parallel spaced metallic members
IPC: B23K9/00
Filed: 1954-05-04
Abstract: 761,908. Welding by fusion. COMBUSTION ENGINEERING, Inc. May 4, 1954 [June 10, 1953], No. 12918/54. Classes 83 (2) and 83 (4). [Also in Group XII] Making steam generators.-A method of welding together two parallel spaced thin-walled ferrous metal tubes 10 comprises inserting a steel filler rod 20 supported by a backing strip 14 in the space between the tubes, applying localized welding heat progressively along the filler rod whereby it is completely fused and united with the tubes but not with the backing strip and then removing the backing strip. The backing strip is preferably of copper and may be spaced from the filler rod by steel spacer wires 22 and a granulated flux 24. An arc is struck between an electrode 16 and the filler rod. In another embodiment, Fig. 4 (not shown), a circular filler rod resting directly on the backing strip is used. A plurality of parallel steel tubes 10, Fig. 2, may be jointed together by the above method to form water tube panels for use in steam generators.
Patent GB-660324-A (GB)
Title: Horizontal reference
IPC: G01C15/14
Filed: 1949-05-17
Abstract: 660,324. Sextants; sighting levels. KOLLSMAN INSTRUMENT CORPORATION. May 17, 1949 [June 9, 1948], No. 13100/49. Class 97 (ii). An artificial horizon comprises a light source 4, an aperture 6 for the source 4, a pendulous mirror 9, a lens 8 through which the light after reflection from the mirror 9 passes to form an image of the aperture in the plane A-B and means, e.g. the lens system 2-3 for determining the position of the image, wherein the pendulous mirror 9 is pivotally mounted for universal tilting, e.g. on a jewel 27, and has a conical depending skirt 29 extending substantially below the mounting and serving as a pendulum to maintain the mirror surface substantially horizontal. As shown, the skirt 29 has a major portion of its sides cut out to lower its centre of gravity. Preferably the mirror is mounted in a spherical enclosure 21, 22, 23 which is filled with a transparent damping liquid, a bellows 13 being provided to allow for temperature variations. The spherical enclosure has a transparent window 25 through which the incident and reflected light pass and a retainer ring .33 is provided which prevents the mirror and its 'skirt becoming completely disengaged from its pivot on inversion of the instrument. The outer enclosure may also be filled with the damping liquid. As shown, the artificial horizon forms part of a sighting level, an objective lens 1 being provided for viewing the distant object. A partially silvered reflector 7 reflects the reflected light from the mirror 9 into the line of sight. The mirror is so located that its optical distance from the focal plane A-B is one half of the focal length of the lens 1 so that the image of the aperture 6 will coincide with the image of the distant object.
Patent GB-356173-A (GB)
Title: Improvements in roofing tiles
IPC: E04D1/04
Filed: 1930-04-29
Abstract: 356,173. Roofing tiles. SMALL, W., Woodstock, Lordswood Road, Edgbaston, Birmingham. April 29, 1930, No. 13107. [Class 87 (i).] A roofing tile with an inverted tapering trough 1 at one side and an upturned wall 4 on the other side which is inclined to correspond with the tapering inclination of the outer wall of the trough has a cut-away corner 3 on the trough side and a cut-away corner 5 on the opposite side so that when the corners 3, 4, 5 abut the wall 4 of the tile A is in alignment with the outer wall of the trough 1 of the tile B diagonally below it. The edge 3 may face downwards and the edge 5 upwards so that the plane of the abutting edges 3, 4, 5 may cut the plane of the tile in a line substantially parallel to the top and bottom edges thereof. The joint 3, 4, 5 is covered by the trough of the tile shown in chain lines.
Patent GB-490704-A (GB)
Title: Improvements in the removal of acids from boiler feed water
IPC: C02F5/00
Filed: 1937-05-07
Abstract: Boiler feed-water is deacidified by filtration through a bed of finely divided tanned or untanned skin, fine wool, or horn, or other albuminous material the acid-absorptive properties of which are renewed periodically by treatment with a solution containing hydroxyl ions.  The albuminous material may be associated with carrier bodies. For example, carrier bodies may be impregnated with solutions of glue, gelatine and the like, which may be rendered insoluble by treatment with formaldehyde or heat.  For the revivifying treatment solutions of sodium carbonate or bicarbonate or of caustic soda are suitable.
Patent GB-108566-A (GB)
Title: Improvements relating to Furnaces.
Inventor: SOUTHWICK PETER
IPC: F23H13/00
Filed: 1916-09-16
Abstract: 108,566. Southwick, P. Sept. 16, 1916. Crucible furnaces.-In crucible furnaces burning solid fuel, an air-admission frame a arranged above the grate level is constructed of slotted cast-iron bars mitred at their ends and secured together by dovetail connexions as shown in Fig. 2.
Patent GB-676697-A (GB)
Title: A new or improved machine for treating with a liquid articles and blanks of or including fibrous sheet material
IPC: D06B3/30
Filed: 1949-05-18
Abstract: <PICT:0676697/III/1> <PICT:0676697/III/2> A machine for treating with a liquid articles and blanks of or including fibrous material comprises, in combination, a container for the treating liquid, a pair of co-operating rollers associated with the container, a double or folded web of flexible sheet material which extends between the nip of the said rollers and provides a pocket adapted to receive an initially flat article or blank inserted into the machine, and means for effecting movement of the web between the rollers, in one direction to convey an inserted article into the treating liquid and in the reverse direction to eject the treated article from the machine. Referring to the drawings when a treadle (not shown) attached to chain 28 is depressed, the folded portion 26a of the web 26 is drawn downwards into the solvent, against the action of spring 24, thus revolving and moving upwards rollers 7 and 8 which thus keep the web taut; release of the treadle allows the control rolls 7 and 8 to move downwards under the influence of springs 24.  Thus when a blank is inserted through slot 13 in lid 2 and the treadle depressed the blank is taken down into the folded portion 26a of the web and hence into the solvent.  Upon release of the treadle the blank is removed from the solvent and ejected through the slot 13.
Patent GB-253343-A (GB)
Title: Improvements in and relating to motor-operated agricultural and gardening appliances
IPC: A01D75/30
Filed: 1925-05-21
Abstract: 253,343. Pugh, Ltd., C. H., and Bull, G. F. May 21, 1925. Rollers, land and garden; disc-tool and rotarytool machines; travelling and propelling gear; adjusting parts.-A motor-operated appliance of the multiple or gang type comprises a wheeled main frame, a motor, a transverse power shaft, and a number of revolving rolling, cultivating, or like units driven from the power shaft and carried by independent radius members pivoted about the axis of the power shaft, a swivel joint being provided in connection with each unit to allow for the twisting or turning of each unit relatively to the pivotally-mounted inner end of its radius member. The main frame 1 may be mounted on two rear wheels 2 and a front wheel or roller 4. The transverse power shaft 5 may be driven from the motor 3 by a chain 6 which may also drive a shaft 7 geared to the wheels 2 by chains 8. Three lawn-mower units B, C may be arranged with the central unit in front of the two side units. Each unit comprises a housing or frame 10 mounted on side wheels 11 or rear rollers,. and connected to an inclined radius arm 12 the forward end of which is connected by a swivel joint to a T-head pivoted on a sleeve forming a bearing for the shaft 5. The shank of the T-head carries an adjustable sleeve fitting in a sleeve 18 on the radius arm 12. This arrangement allows of adjustment of the effective length of the arm 12 to regulate the tension of the chain 22 through which the cutter is driven from the shaft 5. In the modification shown in Fig. 6, the cutter is driven from a shaft 32 mounted in the arm 12 and driven from the shaft 5 through bevel gearing 29, 30, 31 and a shaft 28 carried by a pivoted bracket 27. A lateral extension of the arm 12 swivels on an extension of the shaft 28. In another arrangement the arm 12 is tubular and a shaft passes through it and drives a shaft on the mower-unit frame 10. The arm 12 is pivoted about the axis of the shaft 5 and the shaft within it passes through a sleeve in the frame 10 so that the mower may swivel about it.
Patent GB-1110611-A (GB)
Title: Stroke sensitive switch
Inventor: BREWSTER ARTHUR EDWARD
IPC: H03K3/286
Filed: 1966-03-25
Abstract: 1,110,611. Proximity switches. STANDARD TELEPHONES & CABLES Ltd. March 25, 1966, No.13281/66. Heading G1N. A switch sensitive to the passage of a body, e. g. an operator's finger, across a given location comprises three electrode E1, E2, E3, of which the centre one E2 is connected to a source of positive pulses P. The two outer electrodes are connected, by way of isolating diodes D1, D2, to the collectors of transistors T1, T2 of a flip-flop circuit. Each transistor has its base connected to the collector of the other transistor and the flip-flop is biased by battery connections +V, -V. In operation, if transistor T1 is conducting and transistor T2 is cut-off, when the operator's finger is moved across the electrodes in the direction E1 to E2, as electrodes E1, E3 are bridged, positive pulses are applied to the collector of T1. However, as T1 is already conducting, noting changes in the circuit. As the operator's finger moves further and bridges all three electrodes, positive pulses are applied to both T1 and T2 but, as the circuit is already in a stable state, this state is not changed. However, when the operator's finger uncovers electrode E1, positive pulses are now applied to the collector of T2 only. The circuit goes through a rapid change of state until T1 is cut-off and T2 is fully conducting, thus changing the state of the circuit. Thus after passing a finger in one particular direction over the electrodes, the final state of the circuit is that corresponding to the last pair of electrodes bridged by the finger. The switch can be operated as above by resistive bridging of the electrodes, in which case they are exposed sufficiently to enable them to be touched by e. g. an operator's finger. Alternatively the switch can be operated by capacitative coupling between the electrodes, in which case they may be buried beneath a protective film, and/or a sliding metal tab may be provided which both provides the capacitative coupling and at the same time acts as an indicator of the switch condition. Automatic indication of the switch condition can be provided by indicator lamps, e. g. gallium phosphide light emitting diodes, which may be coupled to one or both transistor collectors. The electrodes E1, E2 and E3 may be extended to form three long parallel strips, forming a line or boundary, the flip-flop circuit indicating the direction of the last crossing of the line. In a multiple switch arrangement, several switches may be linked by a common central electrode to a single pulse generator. They may also share one common triggering electrode, each switch having only one individual triggering electrode. Thus one or more switches may be switched on separately but all will be switched off simultaneously with one switching movement.
Patent GB-132861-A (GB)
IPC: F01L13/00
Abstract: 132,861. Green, G. W. A., Wans, O., and Livens, F. H. Sept. 24, 1918. Reversing.-A two-stroke engine, having a fuelinjection pump 1 actuated by an inertia tappet a and an eccentric, is reversed by altering the path of a jointpin between the eccentric and the tappet. The fuel pump is given a single stroke, preferably longer than the normal stroke, at a different phase, and the mechanism is automatically returned to its normal pcsition when the engine has been reversed. The inertia tappet a is pivoted upon a pair of links c pivoted at d, and is actuated by a pair of links e connected to the ends k of toggle-levers pivoted at the ends g to a fixed fulcrum. The central pins h of the toggle-levers are connected by a rod i to an engine - driven eccentric, and the links k are connected by a rod l to a disk m carrying a handle 4, which is lowered to the position shown in dotted lines in Fig. 3 for reversing. The handle is held in this position by a spring- cuntrolled pawl 8 engaging a recess 10 in a cam 11 on the disk m, the pawl being automatically released, on reversal of the engine, by a friction device engaging the crank-shaft and connected by a rod 13 to the pawl. The disk m is then returned by a spring 16. In order to allow variation of the stroke of the tappet a, the disk m is mounted in an eccentric bearing adjustable by means of a hand-lever 18. The guide b for the tappet is carried by an arm 3 mounted eccentrically on the bracket 2 to allow adjustment. The tappets and guides of a pair of cylinders are adjusted for varying the speed of the engine by the means shown in Figs. 9 and 10, which also puts the pump of one cylinder out of action when reversing. A shaft 19 within a hollow shaft 20 has two flats 21; levers 22, each connected by a spring 24 to a tappet a, are held in contact with the flats 21 by stronger springs 25, and the tension of the springs 24 is adjusted by means of a handle 26 or a pulley 27 on the shaft 19. The hollow shaft 20 is partly rotated, when reversing, by means of an arm 33 and a link 34 connected to an extension 35 of the link e; one of the guides b is lifted up by a bolt 30 engaged by a flat 28 on the shaft 20, putting the corresponding tappet out of action, while the tension of the spring 24 acting on the other is lessened by the action of a flat 29 on an arm of the lever 22. In a modification, Fig. 11, the handle 4 is mounted on a fixed pivot 37, and a pawl 38 pivoted on the handle is connected at one end 40 to the rod 13 of a friction device engaging the engine shaft. At the other end of the pawl is a cam-surface 41 which normally engages the pin connecting the disk m to the rod l and holds the friction device out of action. For reversing, the handle is lifted until a recess in the pawl engages the pin 36; the handle is then returned, lowering the link l for reversal, and is held by a catch 42. This movement brings the friction device into engagement for lifting the pawl and releasing the pin 36, when a spring returns the disk m &c. to the normal position shown.
Patent GB-611497-A (GB)
Title: Improvements in or relating to electrical socket contacts
IPC: H01R13/11
Filed: 1946-05-02
Abstract: 611,497. Two-part couplings. ARNOLD, C. L., DOWSETT, R. W., and M.K. ELECTRIC, Ltd. May 2, 1946, No. 13370. [Class 38 (i)] Socket contacts for receiving rectangular pins comprise two opposed flat jaws, at least one of which carries a resilient tongue, and a rigid frame defining a rectangular mouth for the socket. In Fig. 2, two flat strips 1, 2, bent to an L-shape and riveted to the terminal bush 11 form the socket jaws. An apertured extension 7 of strip 1 is bent down parallel with the base and receives within its opening the extreme tip 8 of the shorter jaw. A resilient tongue 9 is formed by slitting the jaw 5. In a further embodiment, Fig. 4, a strip 1a, apertured at 7 and carrying a resilient tongue 9 is secured at both ends by swaging over short collars 12 formed on the ends of the terminal block 11. In a still further embodiment, Fig. 10, the two jaws, the contact entry aperture and the resilient tongue 9 are all formed from one bent strip 2b which is secured with a base strip 1b by riveting to the terminal block 11. A third strip 16 may also be fitted carrying an indentation 17 which projects through an aperture in one jaw. The other jaw 5 is inclined inwards towards its lower end, whilst its resilient movement is limited by a stop 15. In a further embodiment, not shown, this stop 15 is replaced by a slot in the base strip through which projects an extension of jaw 5. Specifications 402,474 and 420,700 are referred to.
Patent GB-553469-A (GB)
Title: Improvements in and relating to straight bar knitting machines
IPC: D04B11/06
Filed: 1941-10-20
Abstract: 553,469. Knitting-machines; cams. MELLOR BROMLEY & CO., Ltd., BROMLEY, T. C., and SHORTLAND, A. Oct. 20, 1941, No. 13447. [Class 74 (ii)] [Also in Group XXIV] The draw-cam 10 of a straight-bar machine is mounted on the main cam shaft 11 so as to be shogged therewith so that when the cam shaft is shogged for fashioning or transferring the drawcam is disengaged from the draw-lever 12. The lever 12 may have a follower 14 engaging a cam track 10' in the draw-cam, and a second follower 16 arranged to engage an annular track in a disc spaced from the cam 10 when the shaft 11 is shogged. To allow the cam to produce only one draw motion per revolution, a cam track 110' intersecting itself may be provided, and so that the follower 14 passes correctly across the intersection, a switch 21 is mounted within the groove of a control cam which rotates at half the speed of the draw-cam. Alternatively the switch 21 may have a projection engaged by the follower so that the switch is correctly positioned for the next passage of the follower through the switch. Two draw-levers and draw-cams may be provided, the levers being connected to a chain or other flexible member arranged lengthways of the machine.
Patent GB-703095-A (GB)
Title: Improvements in the production of non-leafing aluminium pigments
Inventor: HILL VERNON JAMES
IPC: C09C1/64
Filed: 1951-06-06
Abstract: In a method of producing a non-leafing aluminium pigment from an aluminium powder, which is normally leafing, with the aid of a deleafing agent, the agent employed is a soap of one of the metals lithium, magnesium and nickel.  Leafing properties of aluminium pigment are destroyed by adding to the powder or paste lithium, magnesium or nickel naphthenate.  Lithium naphthenate is dissolved in a suitable medium, e.g. white spirit, added to pressed aluminium cake and a paste formed.  This is aged for 24 to 48 hours at room temperature or heated to 50 DEG  C. for one hour, and is p  then completely non-leafing.  Specification 555,789 is referred to.
Patent GB-552174-A (GB)
Title: Improvements in or relating to brakes for vehicles
IPC: F16D65/28
Filed: 1941-10-22
Abstract: 552,174. Drum brakes. BENDIX, Ltd., and IRVING, J. S. Oct. 22, 1941, No. 13588. [Class 103 (i)] In brake operating means comprising a wedge or equivalent movable by a fluid pressure operated piston in a direction at right angles to that of the ends of brake shoes to apply the brake the wedge or equivalent has a rocking and axially slidable engagement with the piston to permit slight movement with the shoe ends in a circumferential direction and to allow movement of the wedge independently of the piston for application of the brake by mechanical means. As shown, rollers 21 on the ends of tappets 17 slidable in a housing 12 secured to the back plate 1 of an internal drum brake and acting on the shoe ends 11 engage grooves in a wedge 23 the stem 24 of which has a ball-and-socket engagement with a piston 27. The cylinder with its pipe connections 31 is formed in a cover 14 which with the members 12, 13 are secured to the backplate by bolts 16. Mechanical means for actuating the wedge comprise a shoulder 34 thereon engaged by a forked arm 33 keyed to a shaft 35 carrying an external operating lever 36. The rocking movement permitted to the wedge enables the shoes to abut at either end on anchorages according to the direction of rotation of the drum. A pin slidable in slots in the piston may replace the spherical surfaces 25.