baber/WOPTO huggingface dataset:
Patent GB-400627-A (GB)
Title: Improvements in or relating to the manufacture of new resin like products
IPC: C08G16/02
Filed: 1932-04-27
Abstract: The products of Specification 399,211 are condensed with aldehydes in the presence or absence of acids such as hydrochloric, sulphuric or tartaric acids or alkalies such as caustic potash, caustic soda or potassium carbonate.  Suitable aldehydes are formaldehyde or polymers thereof such as paraformaldehyde or substances yielding formaldehyde such as hexamethylenetetramine, acetaldehyde, propionic aldehyde, crotonic aldehyde, benzaldehyde or furfural solvents such as benzene, toluene, xylene, ligroin and tetrahydronaphthalene may be used.  In examples (1) the product obtained by treating a mixture of colophony and carbon tetrachloride with a solution of boron fluoride in crude cresol is treated with (1) paraformaldehyde, (2) formaldehyde in the presence of toluene and caustic potash, (3) formaldehyde in the presence of hydrochloric acid, (4) acetaldehyde, (5) crotonic aldehyde, (6) benzaldehyde or (7) furfural.  (8) A mixture of the glycerol ester of kauri copal and benzene is treated with a solution of boron fluoride in commercial cresol and the resulting product is treated with benzaldehyde.  (9) The product obtained by treating a mixture of colophony and carbon tetrachloride with a solution of boron fluoride in commercial cresol is esterified with glycerol and treated with formaldehyde.  (10) A mixture of colophony, phenetol and benzene is treated with a solution of boron fluoride in phenetol and the product, esterified with glycerol, is treated with paraformaldehyde.  (11) A mixture of the glycerol ester of colophony, benzene and phenetol is treated with a solution of boron fluoride in phenetol and the product treated with formaldehyde.
Patent GB-851672-A (GB)
Title: Dust extractor
IPC: B01D45/10
Filed: 1959-04-10
Abstract: 851,672. Removing suspended particles from gases. MELDRUM, FLOOD-PAGE Ltd., and FLOOD-PAGE, M. W. April 10, 1959, No. 12156/59. Class 55 (2). An apparatus for extracting dust or other finely divided solid or liquid matter from a flowing stream of gas or vapour comprises one or more rows of vertical tubes, each tube having a free top rim, a water supply pipe for each tube, and water supply means for the pipes, the arrangement being such that water enters the pipes, flows to the interior of the tubes, then upwardly and out over their top rims, and downwardly over their outer surfaces. In Figs. 1-3, the gas finds its way past three rows of tubes 1 in chamber 2, the gas entering at 2A and leaving at 2B. Each tube 1 has a free sharp-edged top rim 1A and is closed at the bottom by a solid rod 1C. Water from feedpipe 9 enters header box 8, overflows into the tops of pipes 5, falls by gravity into the interior of tubes 1, overflows from the tops of these, falls downwardly over the outer surfaces of tubes 1 and finally flows away through trough 3. Header box 8 is provided with an additional pipe 12 which supplies an indicator tube at the top of each pipe 5 is an adjustable collar 11, while a similar adjustable collar 12A is provided on pipe 12. Specification 823,542 is referred to.
Patent GB-1511117-A (GB)
Title: Temperature compensated crystal oscillator
IPC: H03B5/36
Filed: 1976-03-26
Abstract: 1511117 Crystal oscillators STANDARD TELEPHONES & CABLES Ltd 26 March 1976 12169/76 Heading H3T A temperature compensated crystal oscillator circuit, comprises a voltage-controlled reactance WC, a temperature-sensitive resistive network TH and R8-10 for producing a voltage which varies with temperature which is applied to control the reactance, a resistive impedance R13 connected across the crystal and having one terminal connected to the said network and the other to a virtual earth point (i.e. via C5), the direct voltage level at this point corresponding to the compensation voltage at the point of symmetry on the crystal characteristic. A plurality of crystals XL1, XL2 etc. together with their appropriate resistors R13, R13A etc. may be used as interchangeable units, the resistance value being chosen to suit each crystal. Alternatively a single crystal unit is usable interchangeably with a plurality of circuits. An inductance L2 is variable for fine frequency adjustment, and an inductance L1 is adjusted to resonate with the variable capacitance diode WC at the operating frequency. Frequency modulation may be accomplished by applying an appropriate bias to WC via terminal 2.
Patent GB-339229-A (GB)
Title: Bridge support for string musical instruments
IPC: G10D3/04
Filed: 1930-04-17
Abstract: 339,229. Zabransky, V. April 17, 1930. No Patent granted (Sealing fee not paid). Stringed instruments, bridges and mutes for.- The bridge rests upon strings, strips, rods, or tubes in a resonance chamber arranged on the body of the instrument. In Fig. 1, the bridge c rests on the runs b of a string passed backwards and forwards across the preferably circular chamber a. The chamber rests on a violin belly but is cut away underneath so as to contact only at certain points. The bridge c is secured in the chamber by a U-shaped clamp h, or by insertion in a slot in a partition. In Fig. 4, the bridge is composed of a number of separate rods d, adjustable in holes m in a. platform l on the chamber a and resting on strings b. In Fig. 6, the chamber a is let into the body of a mandolin, being supported clear of a reinforcement p, and the bridge c is secured by a wedge q with screw adjustment. When the bridge rests on tubes b<1>, Fig. 8, a mute r which is more or less inserted into the tubes may modify the tone. Or rods of precious metal may be substituted for the tubes b<1>, the tone being varied by providing slots of different sizes therein.
Patent GB-474387-A (GB)
Title: Improvements in or relating to piezo-electric crystal circuit arrangements
IPC: H03H9/54
Filed: 1936-04-29
Abstract: 474,387. Impedance networks. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and RUST, N. M. April 29, 1936, No. 12217. [Class 40 (iii)] A piezo-electric crystal PE, Fig. 10, coupling two tuned circuits, is shunted by a magnetic coupling M in order that the carrythrough effect of the shunt capacity of the crystal may be neutralized or modified for the purpose of causing the overall response characteristic to be symmetrical or of some other desired form. In the mesh shown in Fig. 1, which is equivalent to a piezo-electric crystal unit, the characteristic curve of the total conductance is symmetrical as shown at A, Fig. 2, while that of the susceptance due to the series condenser C1 and inductance L is antisymmetrical as shown at B. That of the susceptance due to the shunt-condenser C2 is the horizontal line C, so that the curve of the total susceptance is displaced upwards and is consequently asymmetrical as shown at D. In order that this carry-through effect of the shunt-condenser C2 may be exactly compensated so that the susceptance curve of the may be rendered anti-symmetrical, the mutual inductance M, with appropriate sign and dimensions, is added, and the Specification shows that this arrangement is equivalent to shunting a positive or negative inductance upon the crystal PE and modifying the tuning- inductances L1, L2. Alternatively, the carrythrough effect may be enhanced, undercompensated, over-compensated or reversed. The arrangement is shown as applied to highimpedance. pentode valves operating at a frequency of 450 kc./sec., the coils L1, L2 being tapped as shown to enable the impedance of the crystal to be matched. The effect of the resistance of the coils may be neutralized by earthing the lower ends of the coils M through a variable resistance, Fig. 13 (not shown). For measuring the characteristics given by various couplings, the output terminals may be connected to a valve voltmeter and the tuned circuits and the coupling M may be separately screened, Fig. 13 (not shown).
Patent GB-832341-A (GB)
Title: Improvements in or relating to valve means in pressure fluid systems
IPC: F16K17/08
Filed: 1955-04-28
Abstract: 832,341. Pressure gauges. FENN, A. G., and HUNT, R. J. April 27, 1956 [April 28, 1955], No. 12225/55. Class 106 (2). [Also in Group XXIX] Fluid from a system 8, Fig. 1, enters a chamber 14 from which it flows to a gauge 9, via a cut-off lift valve 11 normally opened by an adjustable spring 16, and a chamber 20; fluid from the latter also enters another chamber 23 through a duct 22 to act downwardly on a diaphragm 25, the underside of which is subjected to inlet pressure by way of a duct 26. As the pressure in the system 8 rises a diaphragm 15, connected to the valve 11 and forming the lower wall of the chamber 14, is deflected against the spring 16 to close the valve 11; a further pressure rise so increases the upward force on diaphragm 25 that it is lifted to open a release lift-valve 12 normally closed by an adjustable spring 33 so that fluid trapped in the gauge 9 and chamber 23 escapes to a reservoir via valve 12, a chamber 30 and a conduit 32. The upper wall of the chamber 30 is formed by another diaphragm 31. The springs are adjusted to ensure that valve 11 opens at a lower pressure than valve 12. The valves automatically return to their normal positions on a diminution of the supply pressure. In a modification, fluid enters interconnected chambers 37, 38, Fig. 2, and since parallel levers 63, 66 are loaded upwardly by a spring 71, the cut-off valve 11 is unseated by the fluid, with upward deflection of a diaphragm 57, which then passes into chambers 51, 50, joined by a conduit 52, and the gauge 9 by duct 22. As pressure builds up in the chamber 38 a diaphragm 41, forming the bottom wall thereof, is moved downwardly since the unsupported area of this diaphragm is greater than that of diaphragm 57; the spring 71 is thereby overcome and the levers 63, 66 pivot downwardly and the valve 11 is closed. Continued pressure increase in chamber 37 causes downward deflection of a diaphragm 40, contiguous with diaphragm 41, resulting in a similar movement of a further pair of levers 64, 65 against a spring 77 and another diaphragm 58, contiguous with diaphragm 57, thus opening the release valve 12 against its spring 55 so that fluid trapped in chambers 51, 50 and the gauge 9 escapes into a chamber 56 connected to a reservoir by a duct 32. Diminishing pressure in the system enables the valve 12 to close and valve 11 to open. The valves may be arranged as separate units; where several gauges are used the pairs of valves associated with each gauge enable the fluid to be independently released from the gauges at the different pressures. Fluid is gradually applied to each gauge through a throttled opening, formed by the inlet 13 for example. According to the Provisional Specification the loading spring of the release valve may be dispensed with and the valve suitably weighted to provide the required loading.
Patent GB-1523557-A (GB)
Title: Supporting grid for filter medium
IPC: B01D29/15
Filed: 1977-03-23
Abstract: 1523557 Filter constructions BEKAERT SA NV 23 March 1977 [8 April 1976] 12229/77 Heading BID Filter medium 4 is supported by a grid whose rods 1 are shaped to make only line contact therewith, to reduce flow resistance and minimise the area of medium rendered ineffective by the adjacent rods. Fig. 2 shows lozenge section rods 1 whose major cross-sectional length is double the minor cross-section, resistance welded at contact points to transverse rods 2, both rods being stainless steel. Figs. 5 and 6 (not shown) illustrate alternative cross-sections for metal grids, and Figs. 7, 8 (not shown) illustrate plastics grids wherein the two sets of rods 1, 2 make larger areas of contact to facilitate glueing. A cylindrical filter may comprise a grid wherein rods 1 may extend axially or helically, and a conical filter may be similarly constructed. Such grids may support filter medium inside or outside in a centrifugal or rotary drum filter. Fig. 3 (not shown) illustrates a double sided flat filter with rods 2 and 2' intercalated to define filtrate channels between them, for use in a filter press. Fig. 4 (not shown) illustrates a flat, downward flow disc filter element of the type which is periodically rotated for centrifugal cleaning, comprising an impervious bottom plate supporting radial rods 2 and a flat spiral rod 1, several such elements being stacked on a common hollow shaft. Filter medium may be of the surface filtering kind with 30% open area or a depth filter medium of 50% void space and comprising sintered metal fibres may be used.
Patent GB-679881-A (GB)
Title: Improvements in or relating to spinning, twisting and like machines
Inventor: GARNETT JAMES CLIFFORD
IPC: D01H1/38
Filed: 1950-05-16
Abstract: 679,881. Spinning and twisting machines. BAXTER BROS. & CO., Ltd., and GARNETT, J. C. May 16, 1950, No. 12246/50. Addition to 668,527. Classes 120(ii) and 120(iii) The automatic transfer tail forming means of the parent Specification are modified in that the means for automatically catching the yarn after it has been wound round the lower flange of the unfilled bobbin comprises a yarn-retaining member shaped to present the yarn, caught and retained thereby, to a severing device positioned together with the yarn-retaining member between the base of the bobbin holder and the lower flange of the unfilled bobbin mounted on the holder. As shown, a spacing disc 3, formed with a boss 4, is interposed between the bobbin 1 and the base 11 of the bobbin holder, boss 4 being secured to the stem 14 of the holder. Disc 3 fits within a recess in the bobbin base, a stud 5 on the disc engaging a recess 6 in the bobbin. A partcircular dished yarn-retaining disc 8 rests on base 11 and is prevented from rotating by engagement with a retaining stud on holder 11. A light spring 7 is positioned between disc 3 and disc 8. A blade 12 is mounted in a slot in base 11 or is screwed thereto, or is formed integral with a washer-shaped member held down by disc 8. The lower flange 1 of the bobbin is formed with a helical circumferential groove 2 extending from top to bottom of the flange. In operation, yarn leading to a doffed bobbin is caught by the top of the groove 2 of an empty bobbin, is wound round the bobbin flange and, on reaching the bottom of the groove, is trapped between disc 8 and base 11 and is presented to blade 12 which severs it. The transfer tail thus formed on the empty bobbin is retained by the holding action of disc 8 during the subsequent spinning operation.
Patent GB-1127421-A (GB)
Title: Safety device for controlling the circumferential speed of grinding wheels
IPC: G01P1/10
Filed: 1966-03-21
Abstract: 1,127,421. Grinding. MSO MASCHINENUND SCHLEIFMITTELWERKE A.G. 21 March, 1966 [22 March, 1965], No. 12267/66. Heading B3D. A safety device for controlling the drive to a grinding wheel comprises, outside the wearing zone of the grinding wheel, an indicator which controls the grinding wheel drive motor. The device ensures that only the correct type, i.e. a high speed, grinding wheel is mounted on a high speed grinding machine. The indicator consists of a mark 2 on the lateral surface of the grinding wheel which, when the wheel is rotated, is detected by a transmitter 3 which is mounted on the guard 9 of the wheel and transmits a pulse to a circuit controlling the drive motor. If a grinding wheel without a mask is mounted on the machine and a pulse is therefore not produced by the transmitter after the start of the drive motor, the circuit automatically stops the motor. The grinding wheel is driven from the motor by a belt on pulleys 7, 8 and if, as the wheel wears, the circumferential speed of the grinding wheel is too low because of its reduced diameter, a stop 5 on a hinged part 4 of the guard contacts a limit switch 6 to stop the drive motor, the belts then being changed to a higher transmission ratio and the limit switch re-adjusted.
Patent GB-933199-A (GB)
Title: Improvements in or relating to type printing apparatus
Inventor: MASON FREDERICK PERCIVAL
IPC: H04L17/30
Filed: 1962-03-30
Abstract: 933,199. Electric selective signalling systems. CREED & CO. Ltd. March 30, 1962, No. 12287/62. Drawings to Specification. Class 40(1). A type-wheel is moved to a desired position selected by depressing a single key on a keyboard by energizing an appropriate combination of one-revolution clutches interconnected by differential gears in dependence upon the result of comparing an -electric signal representing the actual position of the type-wheel with a signal from the keyboard representing its desired position, and the system is characterized in that the type-wheel always moves from one position to another via the shortest route.
Patent GB-665929-A (GB)
Title: Pneumatic tire mounting device
IPC: B60C25/00
Filed: 1949-05-09
Abstract: 665,929. Wheel tyres. HENDERSON, R. W. May 9, 1949 [July 27, 1948], No. 12337/49. [A Specification was laid open to inspection under Sect. 91 of the Acts, Nov. 11, 1949.] Class 144 (i). A device for assembling tyres in drop-centre wheel rims comprises a hand lever 110 carrying a tyre-and-rim engaging shoe 112, a radius arm 114 adjustable along the lever and formed with a bearing-member 121 for engagement with a spindle on which the wheel is coaxially mounted. The bar 114, which is guided between a channel formed by side-plates 216, welded &c. to the lever, and a base-plate 118, is formed with teeth 122 for locking-engagement with a pivoted latch 120. The gravity-lock of the latch may be augmented by means of a spring.
Patent GB-1146293-A (GB)
Title: Tampon and method of manufacture of same
IPC: A61F13/20
Filed: 1966-03-21
Abstract: 1,146,293. Tampons. KIMBERLY-CLARK CORP. 21 March, 1966 [31 March, 1965], No. 12391/66. Heading A5R. A catamenial tampon comprises a folded rectangular strip of compressed absorbent material which is capable of expanding when wetted and which, when folded and unrestrained, tends to spring back to its unfolded condition, the tampon having been formed by folding the strip of compressed material transversely on itself to a size suitable for insertion into the vaginal cavity. The strip 12 may have one, two or three folds to give a tampon of two, three or four layers. The strip may be held temporarily in folded configuration by a sleeve (25, Fig. 3b,) not shown of water-soluble film, e.g. polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose or sodium cellulose sulphate, or by a conventional applicator tube, or by the withdrawal string 14 attached to one free end of the strip co-operating with a longitudinal slot 19 cut through a juxtaposed portion of the folded strip. The absorbent material may be natural sponge, cellulose or regenerated cellulose sponge or sponge material comprising vinyl alcohol or vinyl chloride and copolymers thereof. Alternatively, the absorbent material may comprise a combination of absorbent and non-absorbent synthetic fibres and absorbent natural fibres.
Patent GB-1180303-A (GB)
Title: Pneumatic Cleaning System for Looms
IPC: D03J1/00
Filed: 1968-03-14
Abstract: 1,180,303. Cleaning apparatus for textile machinery. LUWA A.G. 14 March, 1968 [17 March, 1967], No.12449/68. Heading F4X. A pneumatic cleaning apparatus for a weaving loom 10 comprises blower pipes 53, 54, 56 having nozzles 68 directed at the warp stop motion 18, nozzles 64, 66 directed at heddles 20 and a collector funnel 33 and nozzles 60, 62 directed at the heddles 20 and comb 24 respectively. The pipes are connected to a common air distribution connector 55 by flexible tubing and thence to a common supply of pressurized air (not shown) through an air chest 38 and a duct 42, and a pipe 52 is mounted on a lathe 22 so as to be movable therewith. The funnel 33 is situated beneath the loom and formed from mutually inclined cover plates 31, 32 which lead into a suction aperture 34 connected to a suction source to receive fly and dirt conveyed by air from the blower pipes.
Patent GB-139955-A (GB)
Title: Improvements in boards for use in connection with the washing or cleansing of clothes and the like
IPC: D06F1/00
Filed: 1919-05-17
Abstract: 139,955. Britton, F. C. May 17,1919. Washing-boards.-The rubbing-surface is composed of cross-bars c arranged slantwise by insertion in oblique slots in the side members of the frame a. The bars are secured in place by overlying strips d, d' nailed to these members. Soap receptacles f may be formed at either end of the board to enable it to be used either side up.
Patent GB-881290-A (GB)
Title: Storage of acetylene
Inventor: MILLER SAMUEL AARON
IPC: C10L3/04
Filed: 1959-04-13
Abstract: A granular porous mass of kieselguhr bonded with a melamine-formaldehyde resin and suitable for changing into a dissolved acetylene container is prepared by mixing 492 g. of a 40% aqueous formaldehyde solution at 80 DEG C. with 252 g. melamine, adding to 2860 ml. of water containing 140 ml. of hydrochloric acid thereby forming a colloidal solution 2100 ml. of which after standing for three hours is compounded with 900 ml. of water and 1200 g. of kieselguhr; the resultant paste being dried, crushed and sieved to collect a fraction of size range 8 to 72 B.S.S. mesh.
Patent GB-644945-A (GB)
Title: Shock absorber
IPC: F16F9/516
Filed: 1948-05-07
Abstract: 644,945. Hydraulic shock-absorbers. GABRIEL CO. May 7, 1948, No. 12600. Convention date, July 11, 1947. [Class 108(iii)] In an hydraulic shock absorber having a working cylinder 35 provided with a closure plug 15, and surrounded by a housing 16 in spaced relation to form a reservoir 36, a closure cap 14 for the housing 16, a space A between the cap 14 and the plug 15, the cap 14 having means forming communication between the reservoir 36 and the space A, packing means 37 carried by the cap 14, a passage through the plug 14 communicating with the interior of the cylinder 35 and with the space A, and a valve 41 located exteriorly of the plug and when seated closing the passage, a spring 40 is provided in the space A, acting on the packing 37 and on the valve 41. The passage through the plug comprises four ports 33, Fig. 5, which open into respective circumferential recesses 31 in the lower surface of the plug 15 (Fig. 6, not shown), and into a pair of arcuate recesses 29 in the upper surface of the plug. A raised edge 30 surrounding the recesses 29 forms a seating for the valve 41. Circumferentially-spaced legs 24 downwardly projecting from the cap 14 provide the communication between the space A and the reservoir 36 and are recessed at 25 to abut a shoulder 25 on the plug 15. The shock absorber piston has a reduced-diameter portion 50 having circumferentially-spaced axially-disposed grooves 60 which communicate with the interior 53 of the main piston portion 49 by means of ports 61 and a central port 56. Flow through the port 56 is controlled by a valve 69 the seating 58 of which is formed with a bleedchannel 59. A spring 70 loading the valve 69 is retained in a lower closure member. If the cylinder pressure exceeds a predetermined amount, the valve 41 lifts and liquid passes into the top of the reservoir 36. During its downward flow in the reservoir the liquid tends to cool the outer surface of the cylinder 35. If there is a replenishing valve and no orifice in the lower closure plug, the whole of the flow to the reservoir occurs through the valve 41. On rebound, the ring 64 closes the passage 52 and flow through the piston is controlled by the valve 69. Liquid flows back to the cylinder through the lower closure plug and if the cylinder pressure above the piston increases unduly, flow takes place again through the valve 41. The metal-tometal contact between the valve 41 and its seating, permits air to escape from the cylinder without lifting of the valve.