baber/WOPTO huggingface dataset:
Patent GB-724682-A (GB)
Title: Improvements in or relating to stabilised transistor-amplifiers
IPC: H03F3/04
Filed: 1953-02-20
Abstract: 724,682. Transistor amplifying circuits. MOULON, J. M. Feb. 20, 1953 [June 23, 1952], No. 4846/53. Class 40 (6). In an amplifier circuit comprising a transistor 4 and a potentiometer 14, 15 the input circuit is connected between one fixed terminal of the potentiometer and the emitter electrode, the other fixed terminal of the potentiometer is connected to the base electrode, and the sliding contact is connected to one terminal of a battery 10, the other terminal of which is connected through the output circuit to the collector electrode. The portion 14 of the potentiometer in the base circuit of the transistor produces regenerative feedback tending to produce instability. This is counteracted by the portion 15 of the potentiometer which is in the emitter circuit and increases the input resistance of the circuit. The relative values of the portions 14 and 15 are so chosen as to produce the desired self-bias between the base and emitter electrodes. It is shown that this arrangement results in a smaller power consumption than when a stabilizing resistance is inserted in the collector circuit to increase the output resistance of the circuit. Furthermore, if the portion 14 and 15 are given suitably large values, the gain of the circuit may be made practically independent of the transistor characteristics. Fig. 6 shows a two-stage transistor amplifier wherein the two stages are supplied in series and are coupled together by a phase-reversing transformer 19. Negative feedback is provided by a circuit including a variable resistance 17.
Patent GB-827583-A (GB)
Title: Improved model construction building elements
IPC: A63H33/06
Filed: 1955-02-18
Abstract: 827,583. Model construction elements. DICKIE, R. W. March 29, 1956 [Feb. 18, 1955], No. 4897/55. Class 132(3) Elements which may be used for building models comprise tubes of substantially polygonal cross-section, one or more of the tubes being a push fit into the other or others of the tubes. As shown in Fig. 1, a tube 11 fits into a tube 10, both tubes being substantially square in cross-section and formed of rigid paper. Fig. 2 shows how a number of tubes 10 arranged side-byside and wrapped by a pasted or glued sheet of paper are formed into a cellular wall or base member. Two such cellular members may be joined at right angles by means of an interlocking tongued joint, Fig. 4, which may be glued and have a strip of paper pasted over it. A girder, Fig. 5, may be formed by wrapping together two tubes 10, a strut 21 being glued between the contiguous walls of the tubes, and rods 20 being provided at one end of each tube; the girder may be erected on a cellular base member having four holes to receive the rods 20 and the strut. A mitre joint and an X-joint are described, Figs. 6, 7 (not shown). A model chair, Fig. 8 has tubular leg members 10 which are connected by struts 16, 29. Any other strong and rigid material which may be readily cut by simple tools, e.g. scissors, may be used for the elements.
Patent GB-1221284-A (GB)
Title: Rectifier equipment
IPC: H02M5/253
Filed: 1969-01-29
Abstract: 1,221,284. Static converters. INTERNATIONAL STANDARD ELECTRIC CORP. 29 Jan., 1969 [1 Feb., 1968 (2)], No. 4921/69. Heading H2F. [Also in Division G3] A rectifier equipment comprises a plurality of uncontrolled rectifier units 3 (Fig. 1) in parallel, the input to which is controlled by antiparallel controlled rectifiers 10 triggered by a pulse generator 11 in dependence upon the output voltage of the rectifier equipment. In each unit 3, a transformer, rectifier diodes, fuses and filters are mounted on a common baseplate which is provided with a hooked upper end 25 (illustrated Fig. 5, not shown) for ready attachment to a frame 16 (Fig. 3). Thus a plurality of the units 3 may be hooked on to the frame, and interconnected in parallel depending upon the load to be supplied, together with a control unit 2 and switching unit 1. A three-phase rectifier arrangement is also disclosed. An additional unit 4 consisting of additional filter and/or a rectifier for charging a local battery, may also be hooked on to the frame.
Patent GB-798040-A (GB)
Title: Improvements in or relating to counterweight mechanisms for oven doors and the like
Inventor: SMILLIE GEORGE HORN
IPC: F24C15/02
Filed: 1956-02-17
Abstract: 798,040. Door-operating devices. SIMPLEX ELECTRIC CO., Ltd. Feb. 15, 1957 [Feb. 17, 1956], No. 4938/56. Class 65(1) [Also in Groups XI and XIII] A door 10, Figs. 1, 2, for ovens, refrigerators, &c., is pivotally mounted along its lower edge and balanced in all positions by a weight 11 pivoted along its upper edge. As shown the door has trunnions 16 at its ends supported in bearings 19 attached to the front of the oven and carrying gear wheels 17 meshing with gear wheels 20 carried by trunnions 21 on the weight. Thus, the door and its balance-weight turn in opposite directions
Patent GB-1351887-A (GB)
Title: Rotary hydraulic machines of the axial piston type
IPC: F01B3/00
Filed: 1972-02-03
Abstract: 1351887 Reciprocating pumps and motors J U THOMA and R GALDABINI 3 Feb 1972 [11 Feb 1971] 5065/72 Heading F1A In a fixed or tilting head-type pump or motor having axial or inclined pistons 45, the cylinders 40 are individually mounted in a carrier 15 with ball joints 38 or resilient couplings permitting angular movement with respect to the carrier. As shown, the pistons 45 are connected to a drive flange 13 having ports 51 communicating via piston passages 50 with the cylinders, and sequentially communicating during rotation with inlet and outlet ports 52 in casing 12. The cylinders 40 have slippers 26 engaging abutment 27, working liquid lubricating the slippers via passages 55, 56. The pitch circle of ball joints 46 is greater than that of ball joints 38. Carrier flange 21 may have apertures 41 receiving the cylinders with clearance, as shown, or may be star-shaped with projections extending between the cylinders, Fig. 3 (not shown). In Fig. 2 (not shown), flow to and from the cylinders passes through passages in slippers 26 and carrier 15, the carrier passages (61) communicating sequentially with inlet and outlet ports in the abutment member (28') and the pistons engage axially slidable members (71) in the drive flange, the slidable members (71) having slippers (75) engaging a surface of the casing. The valving arrangements may be replaced by pintle valves.
Patent GB-517661-A (GB)
Title: Hair waving and curling devices
IPC: A45D2/24
Filed: 1939-02-16
Abstract: 517,661. Hair curlers. JARRETT,RAINSFORD & LAUGHTON, Ltd., and CURRY, F. J. Feb. 16, 1939; No. 50728, [Class 131] In hair curlers comprising, two iesilient limbs b adapted to= be retained in closed position by a: slide g, having apertures, or recesses j, engaging the ends k of the limbs ; the slide g constitutes a cap enclosing the end of a supporting frame a and having sleeve parts h sliding on the frame bars. The cap g is made from a blank, flanges i being clinched round the sleeve parts h when the blank is folded over to form the cap. The cap may taper so that when it is moved inwards; it tends to press together the ends of the frame bars a.
Patent GB-116729-A (GB)
Title: Improvements in or relating to Couplings and Connecting Means for Flexible Metallic Tubing.
Inventor: WALTON GEORGE
IPC: F16L33/26
Filed: 1917-04-11
Abstract: 116,729. Walton, G. April 11, 1917. Joints with yielding outer pipe compressed. - Connecting means for flexible metallic tubing comprises a flanged conical bush 1 which may be plain or threaded and is inserted in the tubing 4. A conical sleeve 7 is placed over the tubing, its flange 8 being engaged by the coupling member 9. The conical bush is preferably made of soft metal or material. Reference has been directed by the Comptroller to Specifications 5943/01, 12033/03, and 25864/11
Patent GB-124801-A (GB)
Title: An Improved Charge for Multi-charge Guns.
Inventor: MAXIM HIRAM STEVENS
IPC: F42B5/03
Filed: 1916-04-06
Abstract: 124,801. Maxim, Sir H. S., and Colley, C. C. April 6, 1916. Projectiles ; gun cartridges; projectile fuses. - Relates to charges for multicharge guns, of the kind comprising a number of projectiles arranged one behind the other with propellent charges located between them so as to be fired in succession from the gun. The invention consists in forming each projectile with a rearwardly-extending sleeve adapted to fit over the projectile next behind in succession. In the form shown, the projectiles a, provided with hollow tail-pieces d to contain the propelling-charges g, are arranged to fit over one another and form a continuous column which is inserted in a gun having means for igniting the front charge through holes i. The burning of this charge expels the front projectile, bands f being pressed into the rifling by the pressure; of the gases within the hollow tail. The next charge is also ignited by a fuse k, and so on. The bursting-charges b of the projectiles are ignited by magnesium fuses o and fulminate pellets m.
Patent GB-391941-A (GB)
Title: A process of manufacturing a composite sheet material
IPC: B44C1/10
Filed: 1932-02-20
Abstract: 391,941. Compound sheet material. GRAFTON, W. P., 122, Foots Cray Road, Eltham, London. Feb. 20, 1932, No. 5151. [Class 140.] In the manufacture of compound sheet material comprising a layer of tinfoil secured by adhesive between two layers of cashmere, a web of tinfoil is led from a roller 12 under a roller 14 arranged near the bottom of a vessel 15 containing adhesive, the foil then passing vertically upwards, without coming into contact with any rollers or the like outside the vessel 15, to a pair of heated adjustable rollers 16, 17 to which webs of cashmere are led from rollers 19 ; the conditions are adjusted so that during the vertical travel of the foil the adhesive becomes tacky. Preferably the compound material is led from the rollers 16, 17 to drying rollers 20 in such a manner that each face of the material contacts in turn with the rollers. The rollers 20 may be mounted on a common bracket 22 free to pivot about an axis 23 and urged by a spring (not shown) in a counterclockwise direction. The finished material is wound on a roller 21. Modified forms of apparatus are described in which (1) a pair of adjustable doctor blades is arranged in the vessel 15 above the liquid level, for the purpose of removing excess adhesive from the foil, and (2) the cashmere webs are impregnated with adhesive before they are fed to the rollers 16, 17 ; in the latter modification, wringing rollers, with or without doctor blades, are arranged above the bath in which each cashmere web is impregnated, and each web is led upwards to a guide roller and thence in turn to heated drying rollers and a storage roller.
Patent GB-209621-A (GB)
Title: Improvements in tubular gas burners
IPC: F23D14/58
Filed: 1923-02-22
Abstract: 209,621. Keith & Blackman Co., Ltd., J., and Keith, G. Feb. 22, 1923. Perforated-tube and like multiple-jet burners.-A tubular gas burner 1 is formed with a longitudinal slot 2 containing a plane strip 5 between two corrugated strips 3, 4, which are provided with orifices 6, preferably elongated in the direction of the corrugations, and spaced from the longitudinal edges of the strips a distance appproximately equal to the thickness of the wall of the burner tube 1. The slot is slightly longer than the strips, the gaps at the ends being covered by plates 7 secured by screws 8.
Patent GB-1302407-A (GB)
IPC: F28F9/02
Filed: 1970-02-03
Abstract: 1302407 Tubular heat exchangers SOC ANON DES USINES CHAUSSON 3 Feb 1970 [3 Feb 1969] 5209/70 Heading F4S Heat exchanger tubes 1 extend through clearance holes in an end plate 3 and through corresponding holes in a flexible material (e.g. rubber) plate 5, the latter being clamped by a support plate 7 against the end plate 3 such as to press the flexible material aginst the tube walls to seal the tube apertures in plate 3 and prevent fluid leakage therethrough. As shown in Fig. 1 a header box 10 is mounted on the tube plate to form a header compartment, all the header elements being clamped together using claws 11, and the elements being shaped as shown to apply sealing pressure at the periphery of the header and around the tube ends. The strengthening ribs 8 on the support plate 7 may be extended to the inner surface of the box 10 (Fig. 3) or alternatively (Fig. 2) ribs on the header box may extend to the support plate. Several other modifications in detail are illustrated (Figs. 4-8) all intended to provide sealing pressure at the header periphery and around the tube ends. The tube plate and/or header box may be of metal (e.g. aluminium) or a synthetic plastics material. Or the parts may be of iron, coated with a non-ferrous metal or with a synthetic resin. The tubes 1 may be of circular, oval or rectangular cross-section. They may be of brass, copper or aluminium; and fins 2 or corrugated strip material may be secured in position by mechanically or hydraulically expanding the tubes.
Patent GB-942888-A (GB)
Title: Apparatus for the production of pieces of ice
IPC: F25C1/14
Filed: 1962-02-12
Abstract: 942,888. Ice-making. BRODRENE GRAM A.S. Feb. 12, 1962 [Feb. 13, 1961], No. 5293/62. Heading F4H. Ice-making apparatus in which water is frozen in a layer on a refrigerating surface, comprises a roller having radial ice-engaging projections and a scraper or cutter for breaking up the ice along lines of fracture initiated by the projections, the ice being broken up by relative motion between the surface and the roller and scraper, and the roller being rotated at a speed substantially corresponding to pure rolling motion relative to the surface. The apparatus shown in Fig. 1 is specially designed for forming ice from sea-water for cooling fish. A refrigerant flows in the space between cylinders 1 and 2, and causes water which is supplied via bore 8 in rotary shaft 6 and distributing compartment 10, to be frozen on the inner surface of cylinder 1, the water being directed down the surface by a cylindrical shield 26. The roller 17 is carried by arms 13, 14 fixed to the shaft 6 and has a gear-wheel 21 which meshes with a fixed gear ring 20, Fig. 2, so that as the shaft rotates the chisel edges 19 of projections 18 perform a pure rolling motion relative to the surface of the cylinder 1 thus holding the layer of ice stationary while it is broken up by scraper 24, mounted on an extension of the arm 13. The broken ice drops down within a screen 25 through openings formed between frame members 4, and excess water collects in annular gutter 3 and is pumped back to the bore 8. In alternative arrangements, the cylinder 1 may be rotated and the axis of the roller kept stationary, the ice may be formed on the outer surface of the cylinder, and the cylinder may be horizontal instead of vertical. Also, the refrigerated surface may be plane instead of being cylindrical.
Patent GB-348230-A (GB)
Title: Improvements in and relating to the production of decorative patterns in low or high relief by stencilling
IPC: B44C1/04
Filed: 1930-11-01
Abstract: 348,230. Ornamenting. ASHWORTH, B., 14, Castle Street, Liverpool. Nov. 1, 1930, No. 5351. Drawings to Specification. [Class 93.] Decorative patterns in low or high relief are produced on walls, panels, &c., by applying a stencil plate, filling the stencil apertures with plastic material, which is finished off flush with the surface of the plate, placing a second stencil upon the first one with its apertures within the outline of the design applied thereby, and filling in the apertures and finishing off as before: if desired, further stencils may be superimposed. The apertures of the stencil may be bevelled or undercut so that the stencil may be removed without disturbing the outlines of the design. Before or after removal of the stencil plate, the face of the design may be rolled with a roller having a plain surface ; or, to produce a grained effect, the roller may be mottled, indented, or serrated. The stencil may be made of metal, millboard, rubber, plywood, or like material; millboard or plywood stencils may be treated with shellac varnish to prevent absorption of the plastic material thereby. The plastic material may consist of paint, magnesite composition, plaster, or cement; and it may be selfcoloured, or colour may be applied thereto.
Patent GB-685221-A (GB)
Title: Improvements in or relating to bayonet type two part electric couplings
Inventor: FOXCROFT JAMES CHARLES
IPC: H01R33/46
Filed: 1950-03-03
Abstract: 685,221. Moulding lamp-holders &C. ASHLEY ACCESSORIES, Ltd. Feb. 16, 1951 [March 3, 1950], No. 5388/50. Class 87 (ii). [Also in Group XXXVI] In a pair of co-operating die-parts for moulding a coupling element such as a lamp-holder 11, Fig. 2, (see Group XXXVI), the part shown in Figs. 5 and 7 comprises a projecting portion 23 having raised portions 24 for the formation of bayonet slots, the portion 23 being slotted at 25 to receive a projection 26 on the other part shown in Fig. 8, the projection 26 and the slot 25 between them forming a bridge-piece 21, Fig. 2, adapted to extend over the contacts 18 in the lamp-holder.
Patent GB-1499361-A (GB)
Title: Apparatus for separating a filtrate and a concentrate of solids from a solids-containing fluid
IPC: B01D33/17
Filed: 1975-02-07
Abstract: 1499361 Filter for concentrating slurry ARTISAN INDUSTRIES INC 7 Feb 1975 [13 May 1974] 5391/75 Heading BID A filter comprises a cylindrical housing enclosing annular elements 19 and discs 52 mounted on a shaft 20, defining a sinuous path from an inlet for slurry at one end to a concentrated slurry outlet at the other, the outer peripheries of discs 52 and the inner peripheries of elements 19 carrying ploughs 66, 70 which prevent solids from accumulating on the wall of the housing or round the shaft, as the shaft and discs rotate relative to the elements 19 and housing. Elements 19 and discs 52 may either or both be constructed as filter elements or solid elements in various combinations, but Fig. 8 shows both as filter elements. As shown ploughs 66, 70 are mounted on segmented rings 64, 68 which clamp the filter cloths 23' across the filtrate drainage channels. Normally the shaft rotates in a fixed housing, but the housing could rotate instead of the shaft or at a different velocity therefrom. The ploughs can be flat and parallel to the shaft axis or may be angled (Figs. 2-4 not shown), and are circumferentially spaced to avoid imbalance. In Figs. I and 5 (not shown) the discs are solid and may have by-pass openings adjacent their hubs and adjacent blades to induce flow therethrough (Fig. 6 not shown). Each element 19 is integral with or welded to a ring-section 18A of the housing wall, such sections being clamped together by the bars (17). As well as preventing solids from settling, the ploughs can agitate washing liquid when the filter is cleaned.
Patent GB-825454-A (GB)
Title: Improved method and means for the production of heat resistant articles
IPC: B22F3/26
Filed: 1956-02-21
Abstract: Zirconia of at least 75% cubic crystal structure comprises up to 20%, preferably 2-10%, of one or more oxides of calcium, magnesium, beryllium, strontium, barium or cerium and may also contain as impurities oxides of silicon, titanium, iron, aluminium, potassium, sodium and boron.  Preferred particle size analyses are given.  The material is suitable for use as a non-sticking support for molten metals.
Patent GB-339556-A (GB)
Title: Improvements connected with stays for doors and the like
IPC: E05C17/16
Filed: 1930-02-19
Abstract: 339,556. Freeman, C. H. Feb. 19, 1930. Stays.-A door-stay 7 is mounted on a pivot 8 carried by the door-post and passes through guides 14 on the door 3. A catch 15, pivoted on the door, engages with notches 10, 11 in the stay and holds the door open or closed.
Patent GB-679156-A (GB)
Title: Improvements in or relating to d.c. and low frequency a.c. amplifiers
Filed: 1950-03-06
Abstract: 679,156. Selenium cell relays. NEGRETTI & ZAMBRA, Ltd., and FORMAN, J. March 5, 1951 [March 6, 1950], No. 5637/50. Class 40 (iv). [Also in Group XL (b)] D.C. or very low frequency voltages are amplified by arranging them to vary the polarizing voltage across and hence the sensitivity of a voltage generating photo-electric cell illuminated by an A.C. fed lamp. In the embodiment shown the D.C. signal to be amplified is applied across a resistor 2 the voltage across which provides the polarizing voltage for cell 1b. This cell is connected to a bridge with a cell 1a, alternating signals appearing in the primary of the output transformer 4 in the absence of an input signal being balanced out by varying cell sensitivity by means of resistors 15a, 15b, or by adjusting the position of the lamp 6. In a modification, Fig. 4 (not shown), the cells may be balanced by moving a terminal of the input resistor over a resistor in parallel with the transformer primary. If the bridge circuit is not used a single photo-cell may be employed, the A.C. produced in the cell when no input signal is applied across the resistor being " backed off " by a voltage derived by a known method. The effective resistance of the cell may be reduced by a resistor and rectifier in parallel with it. It is possible, Figs. 5 and 6 (not shown), to make two photo-cells in simple series or parallel opposition with each other and in series with the input resistor. If the outputs of the cells are initially balanced frequency doubling of the input signal will take place.
Patent GB-908256-A (GB)
Title: Improvements in or relating to instrument cases
Inventor: BURGESS ALAN GEOFFREY
IPC: G01D11/24
Filed: 1958-02-21
Abstract: 908,256. Indicating-apparatus. ENGLISH ELECTRIC CO. Ltd. Feb. 20, 1959 [Feb. 21, 1958], No. 5680/58. Class 106 (4). An instrument case 1 has a glass 3 fitted from inside against a flange 2a and is held in position by three or more clips 4 each slidable in a bracket 5 and retained in engagement with the glass 3 by a tag 6 bent up from a bracket 5. Resilient fingers 7 integral with the brackets 5 locate the glass 3 laterally in the case 1. The brackets 5 are secured to the case 1 by spot welding and sealing material may be interposed between the glass 3 and flange 2a of the metal bezel 2.
Patent GB-549056-A (GB)
Title: Improvements relating to sound records on films
IPC: G03B31/00
Filed: 1941-05-02
Abstract: 549,056. Optical sound film tracks. KOLB, O. K. May 2, 1941, No. 5747. Addition to 473,256. Drawings to Specification. [Class 40 (ii)] [Also in Group XXXIX] The sound film control track located in or substantially in the line of the sprocket hole perforations as described in the parent Specification, is added to a film recorder without such a track by applying ink, dye, &c., to the film using a brush and stencil, or by light exposure controlled by a movable or variable shutter. The track may be a variable density or area record and may exercise control in accordance with amplitude or frequency. It is useful when only occasional control is required during reproduction, for example, to increase the volume of special effects or fully orchestrated passages. The track may be added to a negative or to positive copies. Various materials for the stencil plates are stated. Specifications 393,610 and 548,347, [Group XXXIX], are referred to.