baber/WOPTO huggingface dataset:
Patent GB-611391-A (GB)
Title: Thermionic valve amplifier circuit with multiple feedback
IPC: H03F3/189
Filed: 1946-04-30
Abstract: 611,391. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. April 30, 1946, No. 13044. Convention date, April 30, 1945. [Class 40 (vi)] An amplifier with two negative feed-back paths, one of which includes a network having an attenuation/frequency characteristic with a local variation in gain, has an overall gain/ frequency curve which is similar in form to the attenuation/frequency curve of the network, but with the local variation in gain increased in sharpness. In Fig. 3, the main amplifier 1 has one negative feed-back circuit via network 3 which is independent of frequency and another via an auxiliary amplifier 2 which has a R.C. negative feed-back bridge circuit 5 as shown in Figs. 1 and 2, an attenuating network 4 also being included. The bridge has a high attenuation at one particular frequency so that the over-all amplifier circuit will have a high attenuation at this frequency. If the bridge has a given frequency/attenuation characteristic, Fig. 5 (not shown), then the frequency/ gain characteristic of the amplifier over-all follows the general form of the bridge characteristic, but with more rapid changes near the points of inflection of the curve. Two or more R.C. bridges may be connected in series in the feed-back circuit, thus producing a large attenuation at one or more specified frequencies. In Fig. 6, a selective amplifier using one R.C. bridge is shown; valve L1 comprising the main amplifier with a feed-back circuit formed mainly by resistors R2, R4, an attenuating network R3, R4 in the output of an auxiliary amplifier comprising valves L2, L3, with a bridge feed-back circuit connected between the valves L2, L3. The bridge constants may be made variable to increase the attenuation at any particular frequency. In a modification, Fig. 9 (not shown), fine adjustment of the bridge is accomplished automatically by connecting a valve in parallel with one resistive arm of the bridge, the impedance of the valve being varied by altering its grid bias which is derived partly from a fixed source and partly from a diode connected, across the output of the bridge, the circuit constants being adjusted so that the bridge presents its maximum attenuation when its output voltage is zero.
Patent GB-360382-A (GB)
IPC: F01P1/08
Filed: 1930-04-28
Abstract: 360,382. Valves. JUNKERS, H., 21, Kaiserplatz, Dessau, Anhalt, Germany. April 28, 1930, No. 13054. Convention date, May 23, 1929. Void [Published under Sect. 91 of the Acts]. [Class 7 (vi).] Valves are cooled by directing air or gas uniformly over the outer face of the valve. The Figure shows an exhaust valve 9 which is cooled by air directed through openings 22 at the underside of an annular chamber 20. Cooling air is also supplied to a chamber 21 surrounding the valve stem, and passes out through openings 23. The air may be supplied from the scavenging-pump 6 through pipes 18, 19, which may be fitted with controlling devices 33, 34. In modifications, the chamber 20 may be formed in the cylinder walls; the chamber 21 may cool the valve guide; the openings 23 may be replaced by a continuous annular slit ; and the air directed on to the valve head mav be taken from the chamber 21. Also, the valve stem may be hollow and contain cooling-liquid.
Patent GB-823144-A (GB)
Title: Improvements relating to fish dressing machines
Inventor: COLDBECK SIDNEY
IPC: A22C25/00
Filed: 1956-08-20
Abstract: 823,144. Fish, heading &c. FISADCO Ltd. Aug; 19, 1957 [Aug. 20, 1956], No. 13062/58. Divided out of 823,143. Class 28 (2). A fish a, hand placed on a pivoted support 3 of an annular rotated table 2 is carried round to a heading disc knife 5, after which the body comes under a fluted conical roller 6 or other device which feeds it towards the centre until its diminishing tail thickness clears the roller 6, so that its tail projects only sufficiently to be properly engaged by a tail clamp 7 on a rotated drum 16 which then carries the fish round to further dressing devices. Each support 3 is carried on a spindle 10 which is rocked during head-cutting, as in Specification 823,143.
Patent GB-413099-A (GB)
Title: Improvement in pockets
IPC: A44C19/00
Filed: 1933-05-05
Abstract: 413,099. Safety devices for retaining articles in garment pockets. BLAIR, J., 281, Seabank Road, Wallasey, Cheshire. May 5, 1933, No. 13087. [Classes 43 and 141.] A safety device for a garment pocket comprises two elastic or like loops 12, r3 and an endless elastic band 10 which is threaded through, and slidable vertically of, the loops. The latter are secured by the limbs 16, 18 to the outer and inner edges of the pocket opening, and the band 10 encircles a wallet or the like which is to be safeguarded in the pocket. In a modification, a single loop secured to one edge of the pocket opening is employed.
Patent GB-131212-A (GB)
IPC: D06M11/38
Abstract: 131,212. Fine Cotton Spinners' & Doublers' Association, Cunningham, M., and Cross, C. F. Nov. 21, 1918. Liquids, treating with.-Cotton textiles or spinners' raw cotton materials are treated with caustic alkali lye of strength below that which produces mercerization to improve the textile qualities as regards elasticity and extensibility. The strength of the lye used is about 9 per cent NaOH, and the temperature may vary between 15 and 50‹ C. Penetrations may be secured by treatment under low pressure or by wetting out. For example, hanks of yarn are laid in a vessel and the air evacuated, lye at about 51‹ C. is introduced to cover the yarn, and after some minutes air is admitted under pressure. The excess of lye is drained off after 30 minutes. Wash water is then introduced under reduced pressure and ejected under pressure. On removal, the yarn is washed, or scoured and washed, and then dried at ordinary temperature.
Patent GB-417344-A (GB)
Title: Improvements in or relating to pumps for filter presses and the like
IPC: F01B11/00
Filed: 1933-05-05
Abstract: 417,344. Steam pumps. DAVIS, H. H., 2, Woodstock Gardens, Goodmayes, Essex, and JOHNSON & CO., Ltd., S. H., Carpenters Road, Stratford, London. May 5, 1933, No. 13177. [Classes 122 (ii) and 122 (iii).] In a pump of the kind described in Specification 398,684, [Group XXVIII], the main valve 15 is controlled by a combined fluid actuated and mechanical valve gear, and cushioning of the piston 5 at the ends of the stroke is effected, on the up-stroke, by air supplied through ports 4 situated at a distance from the top of the cylinder and, on the down-stroke, by exhaust steam cushioned by the main piston overrunning separate exhaust ports 3 spaced from the cylinder ends. The piston-rod 6 lifts the weight, and through tappets actuates an auxiliary slide valve arranged by the side of the main valve. The main valve 15 controls separate admission and exhaust ports 2, 3 at the bottom of the main cylinder, and the auxiliary slide valve controls separate admission and exhaust passages leading to the ends of the auxiliary cylinders housing the heads of the piston 14 which actuates the main valve. The piston 14 overruns the separate auxiliary exhaust ports and effects the cushioning of the main valvo.
Patent GB-956022-A (GB)
Title: Method of bending glass sheets and apparatus therefor
IPC: C03B23/027
Filed: 1962-04-05
Abstract: <PICT:0956022/C1/1> <PICT:0956022/C1/2> <PICT:0956022/C1/3> A glass sheet is heated to sag it into contact with a skeleton shaping surface, including a main portion and an end portion pivotally mounted thereto, while being supported adjacent its tips and with additional support from two points spaced apart transversely of the sheet between the respective longitudinal extremities of the main and end portions, this additional support being maintained for equal times at both of the support points.  A conventional multi-part skeleton mould comprising a main mould 1 with shaping rails 3 and a counterweighted pivoted end mould 2 with a shaping rail 6, has additional support provided for a glass sheet 17 by an intermediate supporting device 20.  The device 20 has a supporting framework comprising two bars 21 secured to the end piece 13a of the mould supporting frame 13, cross-pieces 22 and 23 and a strut 24.  Plates 28 and 29 extend upwardly from the cross-pieces 22 and 23 and carry pivotally within notches 30 closed by rods 44, a plate 33 engaged by means of notches 34 on each end. The plate 33 has secured to it a glass supporting arm 32, its limbs 38 and 39 carrying upstanding lugs 40 and 41. Further support for the arm 32 is provided by two struts 35 to the plate 33.  The vertical positioning of the arm 32 is such that it is out of contact with the glass sheet 17 when the mould is in its closed position.  In another embodiment, for use with glass sheets of highly irregular outline, the cross-piece 23 and the arm 32 are set at an angle to the end-piece 13a and the limbs 38 and 39 are of unequal length.  An additional, fixed, intermediate support member is also provided.  In a further embodiment a plurality of pivoted supporting arms similar to arm 32 are provided.  Specification 956,021 is referred to.
Patent GB-1445051-A (GB)
Title: Additives for oils
IPC: C08C19/02
Filed: 1974-03-26
Abstract: 1445051 Hydrogenated copolymers RHONEPROGIL 26 March 1974 [29 March 1973] 13284/74 Heading C3P [Also in Divisions C4-C5] Oil additives are prepared by anionic copolymerization of a vinyl aromatic compound and a conjugated diene in the presence of a solvent and hydrogenating the resulting copolymer in the presence of the solvent, said solvent being a hydrocarbon oil having a viscosity of 1 to 24 c.s.t. at 50 C., a flash point of at least 120 C. and a pour point not greater than 0.- 100 C. The copolymer is preferably derived from styrene or alkyl styrenes, and butadiene or isoprene, in the presence of a lithium butyl catalyst, and may be sequenced or statistical. The oil may be a paraffinic or naphthenic petroleum oil, a hydro-refined oil, a heavy alkyl benzene having at least 10 carbon atoms in the alkyl group, a branched paraffinic heavy solvent or a polyisobutylene of molecular weight 300 to 500. Hydrogenation may be effected in the presence of an organic transition metal salt/ trialkyl aluminium or nickel on kieselguhr catalyst. Examples describe the preparation of (1-4 and 6) statistical and (5) sequenced copolymers of styrene and isoprene, and statisitcal terpolymers of styrene, isoprene and butadiene, and the subsequent hydrogenation thereof to give oil additives.
Patent GB-474835-A (GB)
Title: Improvements in machines for the extrusion of metal
IPC: B21C23/30
Filed: 1936-05-11
Abstract: 474,835. Squirting. HENLEY EXTRUSION MACHINE CO., Ltd., and DUNSHEATH, P. May 11, 1936, No. 13355. [Classes 83 (iii) and 83 (iv)] The depth of the grooves in one of the cooperating members of an extrusion press of the screw-thread impeller type increases progressively from the rear end or an intermediate point towards the delivery end. The segregation of impurities is thereby restricted, and the screw-threads may be further modified to augment this result. A press comprises a stationary inner member 10 having threads 16 co-operating with threads 15 on an outer rotating member 1. The depth of the threads 16 increases progressively towards the delivery end from a point A-A, there being a corresponding decrease in the depth of the grooves of the threads in the member 1. The depth of the grooves in either member may also vary periodically along the length of the impellers. The threads may be locally mutilated by cutting grooves 18 therein. Transverse grooves 26 are formed in each thread adjacent the delivery end between the points 28, 27, the amount of metal removed from the threads increasing towards the delivery end so that a clearance 19, 19 is produced, providing a tapering pre-forming chamber. Supports 12 are provided for the central member 10 and may form a continuation of the threads 16, which increase in pitch at this end, or may extend inwardly from the outer member 1, Fig. 6. Grooves or ribs 22 are formed on the sides of the members 12, and extend to the front faces 21. The form of the metal stream may be disturbed at the outlet end by forming a local recess running in the base of the channel. Turning.-Periodic variation in the depth of the helical grooves is obtained by turning them about eccentric axes, the successive starts being cut while the driver is rotated about axes 17a, 17b, 17c, 17d, Fig. 2. Alternatively, the tool is reciprocated during the cutting operation. Specifications 334,315, [Class 83 (iv)], and 394,441 are referred to.
Patent GB-133601-A (GB)
IPC: E05B21/00
Abstract: 133,601. Vaughan, H. & T., and Bryan, S. P. March 12, 1919. Lock mechanism, lever and tumbler type. - Relates to locks provided with means on the inside of the door for operating the lever or tumbler mechanism and the bolt. In the form shown in Fig. 1, an inside handle carries a follower, one end p of which engages a curved recess o in the bolt, whilst the other end has flat sides p<1>, p<2> co-operating with a frame-like part r<1> of the lever mechanism r. The rotation of the follower first raises the lever and then shifts the bolt. The lever spring v acts on the tail u of the lever. In the form shown in Figs. 6 and 8, a tumbler 16 is employed having a pin 15 engaging notches 14, 14a, in the bolt. A slide 19, with an inside finger piece 20, carries a pin 18 working in a slot 17 in the bolt and adapted to engage cam surfaces 25 on the tumbler, so that the tumbler is disengaged and the bolt operated by a continuous movement of the slide. The slide has talons 24 adjacent the talons 13 of the bolt by means of which the key operates the slide and tumbler before acting on the bolt.
Patent GB-611493-A (GB)
Title: Improvements in or relating to latch pin gear
IPC: B64C3/56
Filed: 1946-05-02
Abstract: 611,493. Folding-wing aircraft. FAIREY AVIATION CO., Ltd., and HARROLD, K. May 2, 1946, No. 13361. [Class 4] [Also in Group XXV] A fastening mechanism on the stub-wing of a folding-wing aircraft for securing the folding wing comprises two oppositely directed latchpins 18, 19 to engage corresponding eyes on the folding wing. A hydraulic jack is connected with said latch pins through a linkage comprising two levers 23, 22 and a link 29. Operation of the hydraulic jack causes equal and simultaneous movement in the latch pins. Manual operating means 40 may be provided for use in case of a failure in the hydraulic system.
Patent GB-134606-A (GB)
IPC: B60B25/20
Abstract: 134,606. Merwin, J. E. Nov. 4, 1918. Detachable-rim attachments to wheels.-An insertion blade for interposition between the wheel felloe 11 and a detachable rim 12 comprises a body portion 7, Fig. 1, for insertion between the felloe and a wedge 10, and an apron 6 with an aperture 8 through which passes the securing-bolt 9. The body portion can be bent back to lie also between the wedge and the rim 12, Fig. 2, and a tongue 13 may be bent over to give a double thickness between the wedge and rim, Fig. 3.
Patent GB-135189-A (GB)
IPC: F28G9/00
Abstract: 135,189. Maschinenbau - Akt. - Ges. Balcke. Feb. 19, 1918, [Convention date]. Incrustation and corrosion, preventing.-Surface condensers are kept free from scale and sludge by converting the carbonates and sulphates of calcium and magnesium, which ordinarily occur as impurities in the cooling-water into salts which are only precipitated with difficulty from water. This is effected by the addition of salts such as calcium chlorate, magnesium chlorate, calcium acetate or sodium acetate or of acids such as hydrochloric acid, formic acid, or acetic acids. Reference has been directed by the Comptroller to Specifications 2798/74 and 139/11.
Patent GB-121103-A (GB)
Title: Improved Construction of Pocket or Portable Electric Lamp.
Inventor: KING WALTER
IPC: F21L4/00
Filed: 1918-08-20
Abstract: 121,103. King, W., (Chkliar, I., and Theodor, B.). Aug. 20, 1918. Addition to 103,268. Battery lamps.-A modified switch for a lamp of the kind described in the parent Specification comprises a metal strip A attached to the zine electrode of one cell 3 and having its upper end bent down at B and up again at C so as to clip the bent end of a resilient strip F, the other end of which is also bent so that it can be depressed into contact with a flange of the bulb-holder 11. The reflector described in the parent Specification is omitted, and the bulb-holder screws into the. thick cover 15 and may have additional means for securing it. An insulating-tube 10 surrounds the middle cell and extends up to the cover 15, the spaces within the wrapping above the outer cells being filled with sawdust H and pitch I. In a tcrch, the connecting-strip A extends down to the lowest of three cells, the two upper ones being surrounded by an insulating-tube. A smaller tube protects the central terminal of the uppermost cell, this tube being surrounded by pitch.
Patent GB-164226-A (GB)
Title: Improvements in spark plugs
IPC: H01T13/46
Filed: 1920-05-17
Abstract: 164,226. Glassmann, A. E., and Bartha, J. May 17, 1920. Sparking-plugs.-The projecting inner end 6 of the insulation is grooved both annularly and longitudinally providing seats for rings 28 - - 32 of conducting metal which are thus separated by partitions 34 - - 38 having gaps 12 - - 15. Numerous alternative spark paths are therebv formed between the terminal 24 and plug casing. The insulation is stepped so as to fit against a series of shoulders within the easing.
Patent GB-135545-A (GB)
IPC: C01D5/04
Abstract: 135,545. Dutt, E. E., and Dutt, P. C. Oct. 18, 1918. Drawings to Specification. Potassium sulphate.-Potassium fluoride and silica are heated to 800‹ C. in one of the revolving furnaces described in Specification 124,544 whilst sulphur dioxide and steam are passed in. Silicon tetrafluoride is evolved, leaving a residue from. which potassium sulphate is obtained by lixiviation. The silicon tetrafluoride its introduced, along with water vapour, into the second revolving furnace, where they react with a potash-hearing silicate rock such as feldspar, in the manner described in Specification 133,474, to produce potassium fluoride.
Patent GB-1352417-A (GB)
Title: Apparatus for preparing moulds
IPC: B23Q1/00
Filed: 1971-05-06
Abstract: 1352417 Patterns E BUHRER 6 May 1971 [15 May 1970] 13571/71 Heading B3F An apparatus for supporting a pattern unit, comprising patterns 3, a pattern plate 2 and pattern plate support 4 on the table 14 of a moulding machine includes a frame 1 within which the pattern unit 2, 3, 4 can be aligned by a device 5, and means for lifting the pattern unit 2, 3, 4 and locking it to the table 14. The lifting and locking device comprises a rotatable pin 6 mounted in a bore within the table 14. The pin 6 has a cap 10 which engages flanges 9 on the unit 2,3,4 and which is urged down by a spring 13. At the pin base is a guide pin 15 that runs in a helical slot 15, such that when pin 6 is raised by an actuator 18 it rotates 90 degrees so the cap 10 no longer engages flanges 9. The unit 2, 3, 4 is then raised above the top level of frame 1 and can be gripped beneath pattern plate 2 in grooves (7) for removal. In an alternative embodiment the spring 13 and actuator 18 are replaced by a double stroke fluid motor (28).
Patent GB-678925-A (GB)
Title: Improvements in or relating to a method of and apparatus for regulating the speed ofa turbine
IPC: F03B15/12
Filed: 1949-05-20
Abstract: 678,925. Speed governors. ETABLISSEMENTS NEYRPIC. May 20, 1949 [May 25, 1948], No. 13582/49. Class 57 [Also in Group XXIX] In apparatus for automatically regulating the speed of a turbine, more epecially a hydraulic turbine, the speed regulating element is subject to three control effects which are respectively proportion to the turbine speed, the acceleration of the turbine, and the second derivative of turbine speed, the first two being combined to produce a combined control effect in which the ratio of the co-efficient of proportionality associated with control effect due to acceleration to the corresponding co-efficient associated with the control effect due to turbine speed is greater than half and less than twice the time constant of the fluid in the intake and discharge conduits of the turbine, this combined control effect being itself combined with the third control effect. The co-efficient of proportionality associated with the third control effect is preferably less than the time constant of the rotating mass of the turbine and its load and greater than onethird of such time constant. Thus in Fig. 1 a centrifugal governor 10 transmits movements corresponding to changes in speed to one end of a lever 13 whilst an inertia governor 11 transmits movements corresponding to the first derivative of speed, i. e. acceleration to the other end of the lever. The apparatus 12 responds to the second derivative of speed and its movements are compounded with those of the lever 13 by a further lever 15 connected to the ultimate regulating element through. a relay such as fluid-pressure servomotor 18 with a control valve 17. The control effects corresponding to first and second derivatives of speed may be obtained by dashpot means. Thus in Fig. 3 the centrifugal governor 20 acts through a floating lever type fluid relay 32 on the piston 22 of a dash-pot 23 having a metered orifice 24 connecting its ends. The pressure in the space below the piston 22 is a measure of the rate of change of speed and may be indicated by a pressure gauge 27. This pressure may be applied to a further dashpot to obtain a control effect corresponding to the second derivative of speed. In a simpler form, the centrifugal governor acts directly on the dash-pot piston 22. The piston type dash-pot may be replaced by one of the bellows type as in Fig. 6 in which the movements of the governor sleeve transmitted directly to the rod 47, are compounded through a floating lever 54 with the movements of the rod 58. The latter are produced by the dash-pot 47<SP>1</SP> acting through a bellows 53 and a hydraulic or other relay 55.
Patent GB-1453250-A (GB)
Title: Preparation of colloidal asphaltic solid suspensions in aqueous solutions
IPC: C09K23/50
Filed: 1974-03-27
Abstract: 1453250 Dispersing agent for asphalts HALLIBURTON CO 27 March 1974 [20 April 1973] 13609/74 Heading B1V [Also in Division E1] An agent for dispersing asphaltic solids in an aqueous liquid in the absence of oil comprises a mixture of an amide formed from a saturated or unsaturated fatty acid containing 14-18 carbon atoms and waste lignin liquor. The waste liquor may be waste sulphite liquor and the amide, oleyl amide. Amides based on linoleic, linoleric, stearic, palmitic, myristic and myristoleic acids are also mentioned. The agent may be dried to form a solid dispersing agent. An additive for forming a colloidal suspension of asphaltic solids comprises colloidal asphaltic solids and an effective (1-50%) amount of dispersing agent. An aqueous drilling fluid is based on the colloidal suspension of asphaltic solids, water and additive, the latter at 0.5-2% by weight of drilling fluid.
Patent GB-275754-A (GB)
Title: An improvements in or relating to machines for folding fabrics
IPC: B65H45/101
Filed: 1926-05-29
Abstract: 275,754. Heaton, A. D., and Lang, J. O. May 29,1926. Rigging and folding longitudinally.-Between the triangular folding table e and the guide or nip rolls f the fabric a is passed between a pair of horizontal bars or rollers h which are pivoted at i adjacent to the apex of the table e and are moved on a slide j about the pivot i as centreby means of a handle k or otherwise to control the passage of the fabric and keep its selvages level.