baber/WOPTO huggingface dataset:
Patent GB-452927-A (GB)
Title: Improvements in or relating to electrical relay and oscillator systems
IPC: H03K3/06
Filed: 1935-03-01
Abstract: 452,927. Valve circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.-(Assignees of Koch, W. R. ; 220, Cooper Street, Camden, New Jersey, U.S.A.) March 1, 1935, No. 6560. Convention date, March 1, 1934. [Class 40 (v)] A thermionic relay or oscillator system comprising a pair of pentodes, the anode of each being directly connected to the screen grid of the other, is characterized by a linkage time-delay network associated with the control grid of one of the valves. In Fig. 1, input or control potentials are applied to terminals 56, the control grid 40 of valve 30 being connected over condenser 53 to the screen grid 39 of the same valve. Condenser 53 and resistance 42 constitute the timedelay network. The control grids are differently biassed, source 55 providing higher negative bias than source 54. The output may be applied to a relay 46 as shown. Impulses applied to input 56 cause the relay to pass through a complete cycle, the period of which is dependent on the network 42, 53 ; a negative impulse causes the plate current of valve 31 to decrease to zero, the current of valve 30 increasing to a maximum ; the conditions revert to normal after the time-delay. If the delay network is connected to the control grid with the smaller negative bias, the arrangement constitutes a multivibrator (as shown in Fig. 2). The delay network may be connected in the lead joining the anode of the highly biassed valve and the screen-grid of the other, Fig. 3 (not shown.) ; or separate time-delay networks may be provided between the control grid of each valve and the cathode of the partner valve, the anodes and screen grids being crossconnected as in Fig. 2, (Fig. 4 not shown). The oscillator output may be taken from any of the terminal pairs 58, 59, 60, 61, Fig. 2. With this type of oscillator, the oscillations in the low-bias valve have a rectangular wave-form while those in the partner valve are substantially saw-toothed. The Specification as open to inspection under Sect. 91 describes a D.C. amplifier arrangement comprising two screen grid pentodes, the anode of the first valve being directly connected to the screen grid of the second. This subjectmatter does not appear in the Specification as accepted.
Patent GB-783986-A (GB)
Title: Improvements in or relating to windows for vehicles
IPC: B60J1/16
Filed: 1955-03-07
Abstract: 783,986. Vehicle windows. BEATON & SON, Ltd., G., CREBER, R. W., and SIMPSON, E. Feb. 27, 1956 [March 7, 1955], No. 6681/55. Class 20(3) A window for a vehicle comprises a slidable glass panel 11 and a hingedly mounted glass panel 12 mounted respectively on support rails 13, 14 on a member 15 secured to the lower rail of a window frame 10, the support rails 13, 14 being engaged respectively by hose-like carriages such as 17 and 26, which are secured within channels in the lower glazing rails of the panels 11, 12. Each carriage, having its underside formed with a key-hole shaped groove corresponding in cross sectional shape to its supporting rail 13, or 14, carries a friction and anti-rattle shoe 19 which is pressed down on to the respective rail 13 or 14 by means of springs 21 reacting against the underside of the associated channel. The panel 11, with its upper edge only partially engaged in an upper channel of the frame 10, is readily inserted into, or removed from, the frame 10 by sliding. it to a position where the carriages 17, register with two gaps 22, 23.in the support rail 13, the gap 23 normally being' filled with a removable stop 24. The hinged panel 12 does not engage a channel at the top of the window frame and thus can be swung inwards by an amount limited by a draught excluding stop 29. The hinging movement of the panel 12 is effected by a mechanism comprising a link 32 pivoted at one end, at 33, to a frame 31, for the panel 12, the other end carrying a pin 34 which slides in a slot in a bracket 35 secured to the top of the window frame 10. Pivotally mounted in the link 32 is a lever 36 on which 'is eccentrically mounted a pin 37 which projects into a slot 38 formed in a plate 39 secured to the adjacent frame 31. The hinged panel 12 may be removed from the frame 10 in the same way as the panel 11. i.e. by detaching a stop 28 and sliding its two carriages into gaps in the supporting rail 14. The panel 11 is provided with a finger grip 20. In a modification the rail supporting the sliding panel 11 is mounted along the top of the frame 10 to depend therefrom, the lower edge of the panel being guided by the upstanding sides of a channel member. Alternatively, in the case of a vertically slidable window, the rail supporting the sliding panel can be mounted along one of the vertical sides of the window frame, a channel member serving as a guide for the panel, being secured to the opposite vertical side of the frame.
Patent GB-645128-A (GB)
Title: Improved method and means for intensification and electrical reproduction of images
IPC: G02B27/02
Filed: 1947-03-11
Abstract: 645,128. Image intensifiers; television. SHELDON, E. E. March 11, 1947, No. 6708. Convention date, Feb. 20, 1946. [Class 40 (iii)] [Also in Group XL (a)] Apparatus for intensifying and reproducing images of objects irradiated by X-rays, gamma rays or a beam of neutrons comprises a screen formed by a layer which, in response to the incident radiation, emits light to activate a photo-emissive layer producing electrons which are temporarily stored on a further member which is scanned to produce a visible image. In the arrangement shown the layer 18 is of fluorescent material, such as willemite, zinc sulphide or calcium tungstate and the photoemissive layer 19 preferably includes caesium oxide. The photo-emissive layer may be of antimony or bismuth combined with lithium oxide. The mosaic 12 which is scanned by a beam under control of deflection coils (not shown) is associated with an electron multiplier 15 and is preferably backed by a resolving screen 12a designed to correlate the elementary areas of the mosaic 12 with the elements (crystal dimensions) of the fluorescent screen. In a modification, Fig. 2, a reflecting layer 26, preferably of aluminium, is interposed between the end 27 of the tube 20 and the fluorescent layer 28 and in a further modification, Fig. 3 (not shown), the layer in contact with the end of the tube is responsive to irradiation by neutrons to release electrons which activate a fluorescent layer which in turn activates the adjoining photo-emissive layer. The layer reacting with the neutrons should include boron, lithium, uranium or gadolinium. A layer of lead or bismuth releasing electrons when exposed to X-rays may be included between the end of the tube and the fluorescent layer. In the arrangement shown in Fig. 4 the object 55 is subjected to a beam of X-rays from a device 54 and the image reproduced on the screen 56 of a cathode-ray tube 51 is reflected by mirrors 57, 58 to a ground-glass screen 59 generally aligned with the end 53 of the imageintensifying tube 50. A fluorescent screen 60 attached to the housing 52 may be used to obtain a direct image of the object 55 subjected to the X-ray or like radiation. A modified assembly, Fig. 5 (not shown), includes an additional reproducer connected through a control arrangement to the image intensifier and utilized for the purpose of monitoring, or, in conjunction with a camera, to produce a permanent record. The Specification as open to inspection under Sect. 91 refers to materials useful for the combined fluorescent and photo-emissive layers, e.g. zinc sulphide in combination with silver and an alloy of caesium and antimony respectively. The photo-emissive layer may comprise lithium and antimony. A thin transparent barrier layer may be employed between the fluorescent and photo-emissive layers or between two fluorescent layers in the cascade type of screen. This subject-matter does not appear in the Specification as accepted.
Patent GB-304065-A (GB)
Title: Improvements in apparatus for use in cutting trenches, ditches, or the like
IPC: E02F5/02
Filed: 1928-03-03
Abstract: 304,065. McLaren, H. March 3, 1928. Trench excavators. - Means for excavating ditches, trenches &c., as between beds of sugar cane &c., or for cleaning ditches, comprises a long flat-bottomed sledge 1 with a superstructure 2 on which a substantially U- shaped scoop 3 is pivoted on a shaft 9, the scoop being adapted to project below the sledge through a longitudinal opening therein; a conveyer, preferably comprising vane-wheels 17, 18, conveys the soil from the scoop to a transverse trough 16 from which a rotatable propeller 35 throws it to either side of the trench. The scoop is adjusted by means of a toothed quadrant 11 thereon and a pinion 12 driven from a hand-wheel 13 through worm gearing. An internal combustion engine 22 on the sledge drives the vane wheels 17, 18, through chains 31, 32, and drives the propeller 35 through reversing bevel-gearing 41 and toothed gears 45, 46. The sledge may be moved as by haulage ropes 6, 7, a wheel 8 guiding the device during the initial cut. Stub axles may be provided on which wheels may be removably fixed for transport purposes. The front edge of the scoop is removable and formed of hardened steel.
Patent GB-776158-A (GB)
Title: Improvements in or relating to absorbers for radio waves
IPC: E04B1/92
Filed: 1954-03-08
Abstract: 776,158. Radio wave absorbers. GENEST GES. FUR ISOLIERUNGEN, W. March 8, 1954 [March 28, 1953], No. 6735/54. Class 40(7) [Also in Group XIII] In order to prevent the reflection of radio waves from the walls of a test chamber, thin parallel sheets, Figs. 1-16 or tubes, Figs. 18, 19 (not shown) spaced approximately #/3 are mounted so as to project from the surface of the wall 1, the attachments being formed of or coated with electric and/or magnetic lossy material such that the effective loss resistance decreases towards the surface of the wall. When parallel sheets are employed they may be disposed perpendicularly to the wall or at an acute angle thereto, Fig. 7 (not shown) and may comprise sheets 2 of loss-free material (thickness ¢-3 mm) such as paper, wood or polystyrene with a coating 3 (thickness 0.02-0.2 mm.) of lossy material such as graphite or powedered iron. The required resistance variation is acheived by increasing the thickness of the coating 3 in steps, Fig. 5, or uniformly, Figs. 7 and 8 (not shown), from the free edge of the sheet towards the edge attached to the wall or the coating may be of uniform thickness the free edges of the sheets being serrated, Fig. 1 and Figs. 3, 4, 11-14 (not shown) and/or the height of the sheets being varied cyclically, Figs. 9 and Figs. 11-14 (not shown). In order to absorb waves polarized in any direction magnetic and electric lossy coatings are arranged alternately or each coating may comprise magentic and electric lossy materials or a further set of parallel sheets is disposed perependicularly to the first set in egg box form, Figs. 3, 4, 13 and 14 (not shown). In a modification, Figs. 15 and 16 (not shown), capable also of absorbing sound waves, the sheets are perforated and the spaces between the sheets are filled with sound absorbing material such as glass fibre plates. The Specification refers to a known form of absorber comprising dielectric layers with interposed conductive films whose surface resistance decreases towards the base.
Patent GB-1508238-A (GB)
Title: Dyestuffs containing isothiouranium groups
IPC: C09B69/00
Filed: 1976-02-20
Abstract: 1508238 Bromoethyl esters and ethers of aromatic acids and alcohols COMMONWEALTH SCIENTIFIC & INDUSTRIAL RESEARCH ORGANISATION 20 Feb 1976 [20 Feb 1975] 6750/76 Heading C2C [Also in Division C4] 3-#-Bromoethoxyaniline is prepared from m-hydroxy acetanilide and ethylene dibromide followed by hydrolysis of the acetyl group. Reaction of the product with 2-hydroxy-3- naphthoic acid chloride gives 3<SP>1</SP>-(#-bromoethoxy)-2-hydroxy-3-naphthanilide. m - Nitro - # - bromoethylbenzoate is prepared from m-nitrobenzoyl chloride and ethylene bromohydrin. Reduction of the product gives m-amino-#-bromoethyl benzoate. 1 - (4<SP>1 </SP>- Carboxyphenyl) - 3 - methyl - 5- pyrazolone is prepared from p-hydrazino benzoic acid and ethylacetoacetate. Esterification of the product with ethylenebromohydrin gives 1 - (4<SP>1</SP> - # - bromoethoxycarbonyl) - 3 - methyl- 5-pyrazolone.
Patent GB-589208-A (GB)
Title: Improvements relating to darts
IPC: F42B6/00
Filed: 1945-03-19
Abstract: 589,208. Darts. RICHARDSON, F. A., and BRETT, H. March 19, 1945, No. 6892. [Class 132 (iii)] A dart with rotatable vanes is provided with a rotatable hub to which the vanes are attached and the hub is longitudinally bored for the passage of a headed pin or nail which is secured in a plug at the rear end of the dart shank. As shown in Fig. 3, the dart has a metal shank 1 with a hollow portion which is screw-threaded internally to receive a screw-threaded plug 5. A spinner comprising a hub 6 mounted for rotation on a pin 7 is provided and vanes 8 are secured to the hub so that each is inclined to the axis. The vanes fit into slots in the hub and are frictionally held under the inherent springiness of the material of the hub by means of a detachable collar 12 which has a tight sliding fit on the rear end of the hub. The vanes 8, as shown in Fig. 6, have root portions 11 which fit into the grooves of the hub. The vanes may be of paper, celluloid, or feathers. The hub may be of wood, plastic composition, or metal. If desired the vanes may be secured by adhesive tape or glue. A dart with non-rotatable vanes fitted to a detachable plug may be converted by removing the plug and replacing it by the rotatable vane device.
Patent GB-194927-A (GB)
Title: Improvements in manually operated cultivating implements
IPC: A01B3/64
Filed: 1922-03-08
Abstract: 194,927. Jones, T. H. March 8, 1922. Power cultivation; draught devices; singlefurrow ploughs.-Cultivators, ploughs, and other garden and field implements are propelled manually by means of a drum L on the implement on which is wound a cable M passing forwardly from the drum to an anchored pulley P and back again to the implement, guiding and controlling of the implement being effected by means of a transverse handle E and of a yoke D passing over the shoulders of the operator. The drum is mounted on the forward or intermediate part of the implement frame A and is driven by means of a crank G, chain or equivalent gearing I, and clutch mechanism operated by a lever N. The cable M passes through a guide O and is fastened to the front end of the frame A after being passed round the pulley P which is hooked to a wire or rail fastened to posts at the edge of the field.
Patent GB-1201191-A (GB)
Title: Metal faced laminates
Inventor: JUDD NIGEL CECIL WILLIAM
IPC: C22C1/08
Filed: 1967-02-14
Abstract: 1,201,191. Metallized fabric laminates. MINISTER OF TECHNOLOGY. 27 Feb., 1968 [14 Feb., 1967], No. 6917/67. Heading B5N. [Also in Division C7] Composite material is made by depositing metal by an electroless process on to a cloth layer, impregnating at least partially at one face with water-soluble material, applying to the other face a cloth layer impregnated with uncured resin, curing the resin, washing off the water-soluble material and depositing further metal on the metallized cloth. Preferably a plurality of resin-impregnated layers are provided, metal is deposited by an electroless process on to a further cloth layer which is then impregnated at least partially at one face with water-soluble material, and this layer is placed, impregnant face uppermost, on to the resinous layers: air bubbles are then removed, pressure is applied via a vacuum bag, the resin is set at room temperature and cured at 70‹ C., the water-soluble impregnant is washed out and further metal is deposited on the metallized cloth layers, first by an electroless process and then by electroplating. The metal may be nickel or copper, nickel may be deposited by catalytic reduction of nickel chloride. The cloth layers may be woven glass or carbon fibres. Other specified materials are sodium alginate as the water-soluble impregnant and polyester or epoxy resin as the resinous impregnant.
Patent GB-333156-A (GB)
Title: Improvements in brakes for railway and other vehicles
IPC: B61H9/00
Filed: 1929-03-04
Abstract: 333,156. Watkins, G. L., and Lewis, W. H. March 4, 1929. Hand actuation; force-transmitting mechanism; compensating for wear.-In brakes for railway and road vehicles having a quick-release hold-on device and automatic means for taking up wear the release means of the hold-on device and the wear take-up means are so co-operatively arranged that the latter is capable of automatic adjustment whilst the hold-on device is retained in its locked condition. As shown applied to a shunter's brake, the usual hand levers at opposite sides of the truck are fixed to transverse shafts 1, 2 supported on brackets 17, the shaft 2 having fixed to it an arm 13 connected by a rod 11 to an arm 12 on the shaft 1. Operation of either hand lever to apply the brakes turns the shaft 2 in a clockwise direction and a hook 4 fixed to the shaft engages one of a number of pins 26 floatingly mounted in slots 27 of a double link 23 connected to an arm 5 on the brake toggle shaft 6, which is thus turned to apply the brakes by the usual connections (not shown). Pivoted to the arm 5 is a ratchet rod 24 adapted to be engaged by a pawl 9, when this pawl is lowered by a cam 10 fixed to the shaft 1, to hold the brakes on. A partial return of the hand levers and hook 4 in the brake release direction takes place before the cam 10 raises the pawl 9 out of the ratchet rod 24 and releases the brakes, so that the hook 4 may engage a fresh pin 26 to take up wear without the brakes being released. The pin 26 adjacent to the one engaged by the hook 4 rides on a cam surface of the hook and when a predetermined amount of wear is exceeded and this pin approaches in the brake applying movement the vertical centre line of the shaft 2 it is raised by the cam on the return movement of the hook and drops in front of the hook. The push rods operating the brake shoes are formed of two metal bars spaced apart by wooden blocks and bolted together. The invention is applicable to waggons having bottom doors and to power operated brakes. Specification 333,189 is referred to.
Patent GB-765626-A (GB)
Title: Sewing machine face-plate
IPC: D05B73/00
Filed: 1955-03-10
Abstract: 765,626. Sewing machines. SINGER MANUFACTURING CO. March 10, 1955 [March 29, 1954], No. 7042/55. Class 112. In a sewing machine frame comprising a bracket arm 11 ending in a hollow head 12, the latter having an opening bounded by a vertical wall 19, and a hook element 28 projecting from said wall at the top of the head, a face-plate 23, which is removably disposed over the head opening and against said wall, has a horizontally disposed shelf portion 24 projecting from the top of the faceplate, and an aperture 25 provided in said shelf receives a portion of said hook element. As shown, the latter is in the form of a screw having a head 34, a portion of the rim of which enters the aperture 25. The face-plate is also secured at its lower end to wall 19 by a headed screw 35. The portion 44 of the face-plate which is engaged by the needle thread 21 is plated with a hard metallic coating such as chromium or nickel.
Patent GB-660391-A (GB)
Title: Manufacture of vat dyestuffs of the anthraquinone series
IPC: C09B5/28
Filed: 1949-03-15
Abstract: Compounds of the formula:  <FORM:0660391/IV (c)/1> in which each R represents the residue of a 1,11-dianthrimide linked in 4-position to the NH-group, and in which the Bz nucleus may be halogenated, are treated with carbazolizing agents of the type of aluminium chloride. Other substituents may be present and the Bz nucleus of the starting p  materials may be halogenated directly.  The products dye or print cotton, linen, artificial silk, and regenerated cellulose grey tints, and they may be used in the form of their leuco-ester (e.g. sulphuric ester) salts.  In examples: (1) the condensation product from one mol. 5,8-dichloro-2,1-benzanthraquinone (see Specification 332,192, [Class 2 (iii)]), and 2 mols. 4-amino-1,11-dianthrimide, and (2), the product obtained by chlorination thereof, are each carbazolized with aluminium chloride and pyridine.  A dyeing example is also given. Specification 335,014, [Class 2 (iii)], is referred to.
Patent GB-349970-A (GB)
Title: Improvements in or relating to boxes or cases particularly for cigarettes and the like
IPC: A24F15/16
Filed: 1930-03-05
Abstract: 349,970. Cigarette boxes &c. KELLY, W. K. and KELLY, A. S., (trading as MARSHALL & CO.), 46, Gray's Inn Road, London. March 5, 1930, No. 7187. [Class 18.] A box or case for cigarettes &c. has a false bottom upon which the articles rest formed from a flexible flap or apron f which is connected at one end to the box and at the other end to the lid so that, when the box is opened, the flap is raised and the cigarettes can be readily withdrawn from or inserted into the case. As shown, the front g of the flap is secured to the front e of the box or it may be secured to both the front and bottom and the rear of the flap is provided with an integral extension, l which is secured to the lid c at or near the edge remote from the hinge ; the rear of the flap may be connected to the lid near the hinge and the flap may be scored along lines x, y so as to cause it to fit snugly into the back of the box when the lid is closed. The ends of the cigarettes at the front of the box may be retained in place by a flap m hinged to the top edge o of the front of the box and having turneddown sides n which are interposed between the sides of the box and its contents ; the sides of the flap m may be fastened and secured to the underside of the flap f.
Patent GB-177377-A (GB)
Title: Improvements in packages for cigarettes
IPC: B65D85/10
Filed: 1921-03-07
Abstract: 177,377. Cahen, H. March 7, 1921. Drawer - and - shell boxes.-A cigarette packet of the drawer- and-shell type is provided with a secondary compartment for matches by forming a depression b in either the drawer or shell. The depression may be extended to form open ends, in which case the matches are retained by an adhesive or by wire catches. In a modification, Fig. 5, the match compartment is formed by providing fclds f in the drawer.
Patent GB-497319-A (GB)
Title: Improvements in and relating to low frequency thermionic amplifying systems and the like
IPC: H03G9/08
Filed: 1937-03-12
Abstract: 497,319. Valve amplifying circuits. FAYERS, A. A. March 12, 1937, No. 7295. [Class 40 (v)] Variation of gain in a thermionic amplifier is accompanied by variation in negative feed-back from the output to the input circuit. The input volume to the triode V1 is controlled by a potentiometer R7, which forms one arm of a feed-back bridge circuit the other arms being R5 and R6, R3 and R4, and the two diagonals the secondary of T1, and the grid-cathode circuit of V1. Positive feed-back is obtained over R5, R6 and negative reaction from R4 which is common to the output of V2 and the biassing circuit of V1. C8 is provided for '' high-note lift." At maximum gain the bridge is balanced and thereafter negative feed-back increases with decreasing gain. C2, R8 is a " bass-lift '' network and C4 balances the bridge. In a modification, Fig. 2 (not shown), there is no positive feed-back and negative feed-back is taken from R4 to a tapping on R7 through a condenser and discriminating filter ; here R4 is not the biassing resistance of V1, a separate resistor being provided for that purpose. Reference has been directed by the Comptroller to Specifications 472,256 and 476,877.