baber/WOPTO huggingface dataset:
Patent GB-225497-A (GB)
Title: Improvements in or relating to zigzag-stitch sewing machines
IPC: D05B3/02
Filed: 1924-03-20
Abstract: 225,497. Grossmann, H. [Firm of]. Sept. 14, 1923, [Convention date]. Work-guides; presser-bars.- A braid-guide attachment 12 mounted for longitudinal displacement on the bed of a strawplait sewing-machine has pivoted thereto an upper member 1 which houses a longitudinallyadjustable rack and carrying a separator plate 8 and also a presser-arm 13, the pressure of which is adjustable. The rack 4 gears with and is adjusted by a spindle 5. A fixed pin 10 bears normally against one side of a groove 9 in the spindle 5 under the influence of a spring 11 to prevent accidental movement of the rack 4. The squared spindle 14 of the presserarm 13 is journaled in a sleeve 16 housed in the member 1 and is held from accidental displacement by a spring 19. The sleeve 16 is held from axial displacement by a screw 21. A collar 22 surrounds the sleeve 16 and is normally held from rotation by the engagement of a spring- pressed pin 29 in a handle 26 thereon with a groove 30 in the part 18 of the member 1. A sleeve-member 31 also surrounds the sleeve 16 and is connected thereto by a spring 33. A spring 38 surrounds the sleeve 16 between an adjustable collar 40 on the sleeve and the member 31 which is thus held in toothed engagement with the collar 22. By rotating the collar 22 and with it the member 31 the spring 33 is wound up until it in turn rotates the sleeve 16 and raises the presser-arm 13. The pin 29 holds the parts in raised position and on turning the handle back to normal position the arm again presses on the work with the same pressure. To adjust the pressure, the sleeve 31 is shifted axially against the spring 38 and then turned to adjust its engagement, with the collar 22. The arm 44 adjustable in the member 42 holds the work flat against the needle-plate.
Patent GB-1072664-A (GB)
Title: Process for the production of calcium cyanamide
IPC: C01C3/18
Filed: 1966-02-18
Abstract: CaCN2 is prepared by heating CaO and gaseous carbon and nitrogen compounds at an elevated temperature, interrupting the reaction (called nitrogenization) and increasing the temperature under an inert atmosphere to decompose the CaCO3 formed, cooling the solid to nitrogenization temperature and effecting further nitrogenization. Specified carbon and nitrogen compounds are NH3 and CO.  The solid may be allowed to circulate between nitrogenization and decarbonization stages, and a plurality of nitrogenization furnaces may be associated with a single decarbonization furnace. Where a plurality of nitrogenization steps is used, the temperature, e.g. 600-750 DEG  C. in each later step may be higher than the previous. The nitrogenization is preferably carried out in a rotary kiln and the decarbonization in a fluidized bed, but other arrangements are possible. The solid and gaseous reactants may be passed counter-current to each other, and may be at an excess pressure of up to 10 atm.  CO and NH, may be used in molecular ratio of 1.5-2.5 : 1 respectively.  Specified inert gases are N2, rare gases, CO, and mixtures thereof.  The waste gases, which contain H2, may be washed with KOH to remove CO2, and CuCl2 soln. to remove CO, and passed to an ammonia synthesis after further N2 has been added thereto.
Patent GB-101453-A (GB)
Title: Improvements in Needle Threading Attachment for Sewing Machines.
Inventor: SMITH MARY OCTAVIA
IPC: D05B87/00
Filed: 1916-05-20
Abstract: 101,453. Smith, M. O., and Frost, W. E. May 20, 1916. Needle - threaders. - A needle-threading attachment for sewing-machines is provided with a hook-carrying rod 30 which, in the inoperative position, is retracted by a spring 32 so as to be shielded between two bracket plates 12 carried bv a two-part clamp 2, 3 fixed to the machine arm. The lower member of the clamp has two ears 10, 11 underneath two horizontal shoulders 16, 17, and the plates are slotted longitudinally at 14 for adjustment. Journaled at the lower ends of the plates is a bar 22 having a thickened body 28, through which the rod 30 is adjustable and fixed by a set-screw 26. The plates are connected by an adjusting-stay 18, which has a threaded extension 19 and shoulder 19<1> at one end and a threaded socket 20 at the other end. The spring 32 connects the stay to the bar 22, and the rod is curved where it contacts with the stay so as to lie well within the plates.
Patent GB-581743-A (GB)
Title: Improvements in remote control systems
IPC: G05D3/14
Filed: 1943-05-07
Abstract: 581,743. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd., and WHITELEY, A. L. May 7,1943, No. 7299. [Class 40 (i)] In a positional control system employing coarse and fine selsyns, the error voltages produced in. the rotors 2, 3 of the selsyn receivers are applied to a common circuit 1 which is such that for small angular disagreement the voltage from the coarse selsyn is suppressed whereas for large angular disagreement the voltage from the fine selsyn is attenuated to allow the coarse selsyn to exercise control. The output from the circuit 1 is taken through a transformer 4 to control an electric or hydraulic motor or a Ward-Leonard system. A pair of shunt paths 7, 8 and 21, 22 across the'circuit 1 each comprise a centre-tapped resistance 19, 26 across which a D.C. potential is developed and two rectifiers 12, 13 and 14, 15 in parallel, as shown. The rotor 2 of the coarse selsyn is connected in the shunt path 21, 22, and voltages therein below a predetermined value produce no effect in the circuit 1, so that only the voltage from the fine selsyn exercises control near the point of correspondence. On the other hand, when the voltage in the rotor 2 is sufficient to take effect, the voltage in the rotor 3 of the fine selsyn exceeds the bias potentials between points 18, 19 and 19, 20 and current flows through the resistance 5 and the shunt path 7, 8, thus limiting the voltage between points 7, 8 to a valve which does not interfere with the coarse selsyn operation. Specification 430,014 is referred to.
Patent GB-581386-A (GB)
Title: Improvements in stoppering devices for fluid containers
IPC: F16K1/30
Filed: 1944-04-20
Abstract: 581,386. Storing gases under pressure. GRAVINER MANUFACTURING CO., Ltd., and MATHISEN, A. April 20, 1944, No. 7299. [Class 8 (ii)] (Also in Group XXI] In means for closing, and facilitating the opening of, the outlets of fluid containers such as fire - extinguishers, comprising a tubular portion 8 having its upper end closed by a stem 9 on an upper portibn 12 joined thereto by a frangible neck portion as described in Specification No. 520,366, the stem 9 is raised clear of the bore 10 by a spring 27 when the neck portion is broken by operation of a screw 24. The screw is provided with a flange 26 which engages under a ring 15 screwed into the upper end of the portion 12, and the spring 27 is housed within the ring to bear against the flange 26 and the upper end of the ring 15.
Patent GB-1076301-A (GB)
Title: Improvements in or relating to circular knitting machines
IPC: D04B9/00
Filed: 1966-02-18
Abstract: In a circular multifeed machine having two independently operating selecting means preceeding each feed, the second in the sequence is capable of modifying selections of the first.  Jacks (14, Fig. 1 not shown) are moved into the range of the selecting means by movable cams (180-6) guiding the bottom of the jacks radially outwards. Unselected jacks are pushed clear of lifting cams (162-8) by fixed cams (170-6).  Needles of unselected jacks or needles passing an inoperative selecting means pass through the feeds at low or tuck level depending on the position of bolt cam (92).  At a first selection (152) jacks are raised by lifting cam (168) so that the intermediate jacks raise needles either to tuck or low clearing height, depending on the position of bolt cam (116).  Selected needles take the kint yarn fed at a low level only.  A further selection is made (154) of needles to be raised to high clearing level to take any yarns at that feed.  At the following feed, needles selected first (156) are raised to high clearing level by intermediate jacks engaging lifting cam (130). Tuck and low clearing needles, depending on the position of bolt cam (132), are selected before the feed by further selecting means (158).
Patent GB-1302066-A (GB)
IPC: A61M25/00
Filed: 1970-02-16
Abstract: 1302066 Medico-surgical tubes D S SHERIDAN 16 Feb 1970 [19 Feb 1969] 7330/70 Heading A5R A medico-surgical tube, in which blood clots or other solid material will not block the passage through the tube between the time of insertion of the tube in a patient and the beginning of liquid flow, has a distal end portion 32 with one or more fluid inlet openings 40, 42, 44, a proximal end portion 34, a central body portion 36 and a resilient cylinder 56 of plastics foam filling the inside of the tube and extending from adjacent the distal end portion to beyond the end of the proximal end portion. The end portion 34 has a tapered cap 48 cemented or welded thereto. The tube may be formed of entruded, flexible, non-fibrous plastics material which is preferably transparent. At the end 32 the porous cylinder 56 preferably extends beyond any openings 42, 44 in the side wall of the tube.
Patent GB-1456440-A (GB)
Title: Boring machines
IPC: B23B41/00
Filed: 1974-02-18
Abstract: 1456440 Boring machines CREUSOT-LOIRE 18 Feb 1974 [14 March 1973] 7357/74 Heading B3C A boring machine comprises a work-table 1, a boring bar 2, a tool carrier 4 which can slide along the bar and is solid in rotation therewith, a means of rotary drive of the bar about its axis and a means of positioning the tool carrier along the bar, the work-table being horizontal and the boring bar being maintained in a vertical position by means of two centring devices 11, one being on a horizontal gantry 30 passing over the table. The bar is rotated through a reducing gear unit mounted on the gantry and coupled to the bar through a pinion 32 which engages with a toothed crown wheel 22 fast with the upper part of the bar. The tool carrier 4 is of triangular form and designed to carry tools for conical boring 41, cylindrical boring 42 and surfacing 43. Positioning of the carrier is by means of a toothed crown wheel mounted loosely at one end of the boring bar, a means of clamping and releasing the crown wheel for rotation with the bar, a pinion engaging with the crown wheel and keyed into the end of a screw parallel to the boring bar and supported by bearings solid with the bar, the said screw engaging with a threaded bore, in a part fast with the carrier. Tools on the carrier are advanced by means comprising a movement bar 93 mounted to rotate in bearings 94 fast with the boring bar and carrying at its lower end a multi-branch star, a fixed stop 12 for controlling rotation of the star and a control pinion 92 for advancing mechanism mounted on the tool carrier, slidable along the movement bar and rotatable by the bar with each rotation of the star on contact with the fixed stop. The advancing mechanism is driven by shaft 90. The cross-piece 30 of the gantry and the upper centring device is removable. The work-table consists of a number of brackets 10. Workpiece 6 has a bracket 60 welded thereto which bracket is used to clamp the workpiece against block 74. Vertical and radial adjustment of the workpiece is by wedges 72, 73 and screws 75 respectively.
Patent GB-844750-A (GB)
Title: Improvements in or relating to damped resilient units
Inventor: SEDDON ROBERT MAXWELL
IPC: F16F3/10
Filed: 1956-03-09
Abstract: 844,750. Rubber springs; friction-type damping. DUNLOP RUBBER CO. Ltd. March 7, 1957, [March 9, 1956], No. 7395/56. Class 108(2). A damped resilient unit comprises an annular rubber cushioning element 21 located around a coiled spring 22 coaxially disposed within which is a rigid supporting member 23, the element 21 and the spring 22 being positioned between, and in contact with, abutments 26, 27, one (27) of which is movable relative to the member 23, the element 21 being free to expand radially under load, the dimensions of the unit being such that, under static load conditions, the element 21 exerts a grip on the spring 22. As shown, the member 23 is grooved at 25 to permit lubricant to flow from a reservoir 33 to the interior of the element 21. The groove may be replaced by a flat, bore, or longitudinal slit. Rebound is cushioned by a buffer 30. In a modification (Fig. 1, not shown) one end of the element 21 engages the base of a cup having conically flared sides which serve progressively to engage the walls of the element 21, and thus modify the spring rate of the unit. Specification 594,908 is referred to.
Patent GB-106156-A (GB)
Title: Improvements relating to Flax Breaking Machines.
Inventor: WILLIAMSON JAMES ALEXANDER
IPC: D01B1/22
Filed: 1916-11-24
Abstract: 106,156. Williamson, J. A. Nov. 24, 1916. Breaking and scutching apparatus.-In flaxbreaking machines having three or more horizontal rows of rollers, the flax being passed first between the nips of the upper pairs of rollers, then in the reverse direction between the nips of the second and third rows, and so on, the bottom roller of each vertical row is the driving-roller for the row, and the bearings of each roller are independently adjustable to vary the depth of mesh of the rollers, and carry the weight of the roller rotating therein and also of the superimposed rollers. The lowest roller of each vertical row is driven by chain gearing from the roller d<1>, Fig. 1, which is geared directly to the main driving-shaft. The bearings c of the rollers slide between vertical guides f and rest upon horizontal bars b separated by distance-pieces b<1>. The bearings c are separated by blocks q, Fig. 6, which can be changed to adjust the depth of mesh of the fluted rollers. The flax may be fed in by a feed trough n, or by a rotary funnel p, Fig. 4, provided with vanes p<1> and rollers p', whereby a twist is imparted to the flax. The treated flax is received upon an apron m. A combination of plain, fluted, spiral, or equivalent rollers may be employed, the plain rollers being provided with fluted ends to mesh with fluted rollers above and below. The rollers may vary in pitch and depth of mesh in each horizontal row.
Patent GB-264686-A (GB)
Title: Self-supercharging 4 stroke petrol engine for motor cycles
IPC: F02B61/02
Filed: 1926-03-18
Abstract: 264,686. Timson, W. H. March 18, 1926. Four - stroke-cycle engines.-Air compressed in the crank case C is delivered to a receiver E provided with one or more automatic valves F to limit the pressure in the receiver. The air passes from the receiver through a carburettor to the engine cylinder.
Patent GB-361234-A (GB)
Title: Improvements in or relating to dental units
IPC: A61G15/16
Filed: 1931-03-11
Abstract: 361,234. Dentists' equipment. GROVES, W. W., 30, Southampton Buildings, London.-(Ritter Dental Manufacturing Co., Inc. ; Rochester, New York, U.S.A.) March 11, 1931, No. 7517. [Class 81 (ii).] In dentists' equipment wherein dental instruments are attached to tensioned cords, such as 12a, which return them automatically after being drawn out for use, the cords are each provided with a latch element (comprising a pin 24 on a lever 22 secured by a flexible tape 21 to a spring drum 18), which, when the cord is extended, engages a latchplate 26, thereby relieving the tension on the cord. The latch plate comprises a guide surface 27 up which the pin 24 rides, a stop recess 28, a latch recess 29 which, as shown in dotted lines, holds the pin during use of the instrument, a second stop recess 30 against which the pin abuts when the cord is again tensioned, and a slot 32 through which the pin returns on release of the cord. The latch-plates 26 are carried by a base member 25, and the sheaths 12, 14, in which the instruments are housed, are pivotally mounted in a drawer 4 having guides 8, sliding on rods 10 and carrying the base members 25. The cords pass around pulleys 17 carrying the levers 22 and moving in guides 16. The drawer 4 is carried by a bracket table 1.
Patent GB-1499452-A (GB)
Title: Method for the heat treatment of cast iron and an equipment for the application of this method
IPC: C21D1/53
Filed: 1975-02-22
Abstract: 1499452 Heat treating articles in fluidized beds INSTYTUT ODLEWNICTWA POLITECHNIKA CZESTOCHOWSKA and LUBUSKIE ZAKLADY TERMOTECHNICZNF ELTERMA 22 Feb 1975 7539/75 Heading F4B [Also in Division C7] Fluidized bed apparatus, for heat treating cast iron articles on a conveyer, comprises a series of at least two chambers, each having a grid supporting a bed of refractory particles, means for supplying a mixture of combusting gaseous fuel and air to one of the chambers, and means for conducting combustion products from the one chamber to another chamber for fluidization purposes. In Fig. 1, a gas/air mixture from mixer 13 is fed to chamber 1, secondary air being supplied through tuyeres 7, the combustion products being passed through cyclone 16, from 17, heat exchanger 14 and into chamber 3 below grid 5, extra heat being supplied to the bed by elements 9. A cooling chamber 2 may be interposed, the bed being cooled by water pipes 8. In modifications, chambers 1 and 3 constitute two halves of a furnace separated by a partititon wall, chamber 2 being dispensed with (Fig. 2, not shown), and chambers 1 and 3 form two parts of a furnace, the castings being carried by a rotating table (Figs. 3, 4, not shown).
Patent GB-161564-A (GB)
Title: Improvements in and relating to the production of cellulose esters
IPC: C08B3/08
Filed: 1921-03-09
Abstract: Cellulose butyrate is prepared from cellulose by treatment with butyric anhydride in the presence of butyric acid and a catalyst such as sulphuric acid.  It is preferred to subject the cellulose to a preliminary treatment with the catalyst using as a solvent, butyric acid or acetic acid preferably containing a small proportion of water, and in the case of butyric acid a solvent such as methyl, ethyl, or butyl alcohol, acetone, diacetone alcohol, or ethyl acetate, to prevent the separation of the bath into layers.  The excess of the impregnating-bath is removed, and the cellulose treated with the acidylating-bath until a product of the desired solubility in alcohol-benzol is obtained; and this may be accelerated by the addition of a small proportion of sulphuric acid at a suitable stage in the esterification.  The ester is soluble in alcohol-benzol, acetylene tetrachloride, acetone, ethyl acetate, carbolic acid, hot alcohol and benzol, alcohol-carbon tetrachloride, and hot solvent naphtha; and it may be used in the manufacture of plastics, transparent sheets and films, artificial silk, lacquers, dopes, and artificial leather.  Specification 167,143 is referred to.
Patent GB-694176-A (GB)
Title: Improvements in or relating to echo sounders
Inventor: ROLFE DENIS HUGH
IPC: G01S15/96
Filed: 1950-03-27
Abstract: 694,176. Echo-sounders. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Nov. 16, 1950 [March 27, 1950], No. 7661/50. Class 118 (ii) [Also in Group XL(c)] A high voltage, high peak current pulse is produced in an echo sounder t'ransmitter by charging a number of capacitors in parallel from a voltage source and subsequently discharging them in series through the transmitter. The discharge is initiated by triggering one of a number of discharge devices which are connected so that the firing of the first one causes the others to fire in succession as the voltages of the charged capacitors are progressively added in series across them. Fig. 1 shows a pulse generator in which capacitors 15, 18 are charged in parallel to the voltage of the D.C. source across terminals 1, 2 via resistors 3, 16 and 17 whilst valves 20 and 4 are non-conductive. A triggering pulse applied by closing switch 27 causes valve 20 to fire so that the voltage of anode 6 rises and valve 4 fires the capacitors 18 and 15 discharging in series through the transmitter coil T. In a modification shown in Fig. 2 capacitors C1-C4 are charged in parallel and when valve R1 is triggered the valves R2-R4 are successively rendered conducting so that capacitors C1-C4 alternately discharge in series through the transmitter coil T.
Patent GB-550194-A (GB)
Title: Improvements in bumpers for motor vehicles
IPC: B60R19/20
Filed: 1941-06-20
Abstract: 550,194. Bumpers for motor vehicles. BRISTER, J. F. June 20, 1941. No. 7791. Convention date, Jan. 3. [Class 103 (ii)] A pneumatic bumper for motor vehicles comprises a base bar 1 of the cross-section shown, a reinforced rubber cover 8 provided with beads 9 adapted to be received in recesses formed by the inturned edges 2 of the bar and an inflatable rubber tube 6 enclosed between the bar and the cover. A valve connection 7 for the tube is provided. Reterence has been directed by the Comptroller to Specification 312,611, [Class 103 (ii)], and U.S.A. Specifications 1,881,390. and 1,885,474
Patent GB-1378686-A (GB)
Title: Methods of and apparatus for testing printed circuit boards
IPC: G01B5/207
Filed: 1973-02-08
Abstract: 1378686 Checking apertures in circuit boards INTERNATIONAL COMPUTERS Ltd 8 Feb 1973 [19 Feb 1972] 7792/72 Heading G1M To test a printed circuit board 10 to check a predetermined pattern of holes formed therein, an indicator device having probes 5 projecting therefrom is aligned with the article, the probes being positioned in the device according to the desired pattern. The probes enter the holes in the article 10 but any probe, such as probe 13, which does not enter a hole, thus indicating that a hole has been omitted or incorrectly sited, remains projecting from the device. The device may comprise a pair of spaced plates 1, 2 and a plurality of captive probes 5 mounted for limited axial sliding in aligned apertures (4) in the plates. The probes 5 may simply move under gravity, or they can be spring-biased enabling the indicator device to be used in any attitude. One plate 1 may bear pins 8 for locating and aligning the device with the board 10 under test.
Patent GB-717782-A (GB)
Title: Improvements in or relating to systems for preheating and humidifying air
IPC: F23L15/02
Filed: 1952-03-28
Abstract: 717,782. Heating air supply for combustion. SVENSKA ROTOR MASKINER AKTIEBOLAG. March 28, 1952 [April 24, 1951], No. 7970/52. Class 51 (1). [Also in Group XIII) Air for combustion in a boiler furnace is heated in two stages between which it is humidified, the air in the two heating stages receiving heat either from a single stream of combustion products or from two streams of combustion products flowing in parallel. In one construction, Fig. 1, the air flows successively from an inlet passage 31 through two rotary generators 10, 12, and is humidified by a water spray 36 in the passage 34, between the regenerators. The latter are heated by gases in flue 18. The water supplied to the spray 36 may be pre-heated in a finned pipe 35, extending through the flue 18. The air may be heated before entering the regenerator 10 by mixing with it hot gases drawn from the flue 18 by a fan 24. Part of the air leaving the first regenerator 10 may flow through a pipe 33 to the furnace for use as primary air. In another form, a single rotary regenerator is provided with one hot gas passage and two air passages through which the air flows in series and between which it is humidified. In a plate or tubular recuperator, Fig. 4, of the indirect contact type, the air is moistened by a spray 56 is a passage 54 connecting the air passages of two main recuperator sections 50, 52, in series. To prevent corrosion by excessive cooling of the hot gases, the air before entering each section 50, 52, is heated by the hottest gases in a preliminary section 51 or 53 respectively.