baber/WOPTO huggingface dataset:
Patent GB-619803-A (GB)
Title: Improvements in thermal electric switches
IPC: H01H35/26
Filed: 1946-12-24
Abstract: 619,803. Thermal switches. WILCOLATOR CO. Dec. 24, 1946, No. 37904. Convention date, Aug. 20, 1943. [Class 38 (v)] A thermal switch is actuated by a snap-action spring 26, 28 when permitted by the contraction of a bellows 8, and re-set manually by a plunger 36. The spring 26, 28 is E-shaped, the ends of the outer limbs 26 being secured by screws 27 and the bowed centre limb 28 having a knife-edge engaging a stud 29 on a switch arm 6. The limb 28 always tends to turn the arm 6 anti-clockwise on a knife-edge about a stud 7, a stop 34a limiting this movement. A bracket 30 attached to the common limb of the E-spring 26, 28 extends through an opening in the arm 6 and loosely carries a contact block 31 having contacts 33 co-operating with fixed contacts 34. The bellows 8, actuated by liquid in a chamber 9 contains a plug 13 adjustably screwed to a rod 16 freely passing through the arm 6 and engaging it by a flange 19. The rod 16 has lugs 20 slidable in grooves in a spindle 22, rotatable through one revolution by an adjusting knob 23 to vary the distance between the flange 19 and the plug 13 and hence the operating temperature. A rise in temperature causes the bellows to contract, compressing a spring 17, and moving the flange 19 to the right, thereby permitting the arm 6 to be rotated counterclockwise by the spring 26, 28. The limb 28 moves between the limbs 26 through a deadcentre position whereby the bracket 30 snaps to the left and opens the contacts 33, 34; the block 31 being arrested by stops 38. If now the temperature falls, the spring 17 is insufficient to return the spring 26, 28 and reclose the circuit, this being effected by pressing the plunger 36; the plunger can also be pulled to open the circuit. Specification 508,926 is referred to.
Patent GB-303018-A (GB)
Title: Improvements in non-skid tire chains
IPC: B60C27/16
Filed: 1928-12-22
Abstract: 303,018. Wire Cord Hose Pipe Co., (Assignees of Weigel, D. M.). Dec. 23, 1927, [Convention date]. Tread bands.-In non-skid bands comprising cross-members 12 connected by side-chains, the latter are formed of alternate metal and inextensible rubber links, the rubber links being arranged to prevent contact between the metal links and the side-walls of the tyre. In the form shown in Fig. 2, the rubber links 14, which may be reinforced by wires or metal braid, are looped around metal links 13 connected by hooks 21 to the tread members 12. The ends of the sidechains may be adjustably connected by a rubber &c. strap 17. In a modification, the members 12 are connected directly to the links 13, thereby avoiding any metal-to-metal contact. The tread members shown consist of moulded rubber bands with reinforcing wires 20 and other wires 22 embedded end-on to the tread surface. Specification 288,116 is referred to.
Patent GB-849094-A (GB)
Title: Improvements in advancing arrangements for tunnelling machines
IPC: E21B4/18
Filed: 1956-12-13
Abstract: 849,094. Tunnelling and mineral-mining machines. BADE & CO. G.m.b.H. Dec. 13, 1956 [Jan. 10, 1956], No. 38053/56. Classes 68(1) and 85. Earth boring apparatus comprising a cutter head carried by a casing is fed along the bore by a hydraulic ram adapted to engage the sides of the bore, and reciprocatable relative to the casing in the longitudinal direction of the bore. The apparatus may be used for tunnelling but, as shown, it is adapted for opening out a vertical pilot hole. Hydraulic fluid from a tank 1 is fed by a pump 2 to a valve 3 which first directs fluid to the cylinder 15 of the ram to move the plunger 24 into contact with the bore. When a predetermined fluid pressure is reached the valve 3 operates tc direct fluid to a valve 5 whilst maintaining pressure in the cylinder 15. The valve 5 in turr directs fluid to the upper parts'of cylinders 11 sc that plungers 6 connectec to the ram are movec to press the cutting heac 27 forward. As the plungers 6 reach the bottom of their strokes the fluid pressure operates the valve 5 so that fluid is directed to the tank 1 through the pipe 23. Resultant on the reduction of the fluid pressure, the valve 3 opens to release pressure from the cylinders 15 and the plunger 24 is retracted by a spring 9. The valve 5 is also operated to direct fluid to the lower ends of the cylinders 11 so that the ram is lifted up the bore, the apparatus being prevented from falling by a cable 25 extending up the pilot hole. When the plungers 6 reach the tops of their strokes the valve 5 is operated to maintain pressure in the cylinders 11 and the valve 3 is operated to direct the fluid to the cylinder 15 so that the feed cycle is restarted. During the time the pump is acting a guide roller 19 is caused to bear against the side of the bore.
Patent GB-865260-A (GB)
Title: An improved ball nut and screw assembly
IPC: B62D3/08
Filed: 1959-11-11
Abstract: 865,260. Screw-and-nut gearing. GENERAL MOTORS CORPORATION. Nov. 11, 1959 [Dec. 1, 1958], No. 38225/59. Class 80 (3). In a ball-nut and screw assembly comprising two separate closed ball paths having transfer tubes 16, 18, wire arcs 24, 26 are fixed to the walls of the groove and have their ends 24a, 26a, 26b shaped to deflect the balls between the helical paths and the ends of the transfer tubes 16, 18. The wire arc 26 is located between the ball paths and the wire arcs 24 are located on opposite sides thereof, the wire arcs being fixed to the walls of the groove in the nut 12, preferably by copper hydrogen brazing. The ends of the wires are machined in situ. The nut 12 has flats 30, 32 separated by a ridge 34 which supports the transfer tubes 16, 18.
Patent GB-1284661-A (GB)
Title: Improvements in or relating to valve devices for controlling liquid flow
Inventor: KAWASHIMA KAN-ICHI
IPC: F16K31/22
Filed: 1970-08-11
Abstract: 1284661 Valves K-I KAWASHIMA 11 Aug 1970 [14 Aug 1969] 38654/70 Heading F2V A valve arrangement, which is designed for controlling the supply to a cistern (not shown) and which may be adjustably and removably suspended from a wall of the cistern (Fig. 2, not shown), comprises a housing 1 defining inlet, outlet and float chambers 5, 7 and 8, respectively. Inlet chamber 5 communicates with a supply line 23 by way of a channel 4 formed in the housing 1, outlet chamber communicates with the cistern via a passage 3 and float chamber 8 communicates witn the cistern via ports 9 and 10. Depending from the lowermost end of the float is a stem 12 the free end of which carries a valve closure member 14 designed to co-operate with a seat 6 which surrounds a passage extending between chambers 5 and 7. A manual operator 19 is connected to the topmost end of the float and projects from the housing 1. In a modification, Figs. 3-5 (not shown), the inlet chamber is fed from two supply lines and the outlet chamber discharges through two spaced passages, the supply lines being disposed one on either side of the float chamber.
Patent GB-387722-A (GB)
Abstract: 387,722. Photometric apparatus. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A., and KEITH, C. R., 4, Arcade House, Finchley Road, London. Aug. 13, 1931, No. 22924. [Class 97 (i).] A photometer for measuring the light flux from an illuminated area is provided with a diaphragm having a small orifice upon which the light from the illuminated area falls, and a lens or lenses adjacent the diaphragm to collect the light traversing the orifice and direct it into the photometer. The instrument is particularly intended for measuring the optical density of the sound track on a kinematograph film, especially when the track is of the variable area kind. The Figures show an apparatus in which the light passing through the sound track is compared with a standard illumination. Light from the source 4 passes through two slits 3 in a plate 2, the film 6 under examination being placed with its sound track over one of the slits. The two light pencils then pass through small apertures 14 in a diaphragm 13 and are collected by lenses 15 and directed into the photometer. The photometer shown is of known kind comprising a polarizer 7, analyser 8, collecting lens 9, bi-prism 10, eye lens 11, and eye point diaphragm 12, the intensities of the two halves of the field being matched by rotating the analyser. The apertures 14 may be provided in a diaphragm 16, Fig. 2, on a tubular member 17 within which the lenses 15 are mounted, the member 17 being adapted to be mounted at the lower end of the photometer. When the sound track is of the variable density kind, the apertures 14 and lenses 15 are not needed, and for use with a film of this character a fitting 17<1>, Fig. 4, interchangeable with the fitting 17, may be provided, this fitting 17<1> having comparatively large light-admission apertures 21 to replace the apertures 14 and lenses 15.
Patent GB-1024821-A (GB)
Title: Transistor oscillator incorporating a starting circuit
IPC: H02M7/53862
Filed: 1962-10-12
Abstract: 1,024,821. Transistor oscillating circuits. GLOBE INDUSTRIES Inc. Oct. 12, 1962 [Oct. 20, 1961], No. 38805/62. Heading H3T. A transistor oscillator incorporates a starting network 50 which includes a starting transistor 54 connected to deliver starting bias to the oscillator and cut-off means actuated by oscillation of the oscillator and adapted to effect permanent cut-off of the starting transistor as long as the oscillator remains in its running condition. In the circuit shown the oscillator comprises transistors 10, 12 connected in pushpull and employing saturable transformer 32. The starting network comprises a voltage divider 51, 52 and the emitter-collector path of transistor 54 connected across the supply 18, the impedance of the emitter-collector path of transistor 54 being determined by the bias set by resistor 56 and transistor 58. After starting of the oscillator transistors 54 and 58 are cut off by means of a bias derived from transformer 32 and rectified by diodes 64, 66. The bias signal may alternatively be picked off on a small bias winding on transformer 24. Resistor 52 may be omitted.
Patent GB-1113192-A (GB)
Title: Fluid flow control valves
IPC: F16K5/04
Filed: 1965-09-10
Abstract: 1,113,192. Valves. H. A. ROY. 10 Sept., 1965 [1 April, 1965], No. 38842/65. Heading F2V. A valve assembly comprises a body 2, Fig. 2, containing a driver segment 24 and a sealer segment 26 which straddles two outer parallel walls 30, 32, Fig. 5, of the driver segment. The driver segment is preferably made from steel, steel alloy, aluminium, brass or bronze, rests on a disc of resinous material 8 and is straddled by legs 42a, 44a, Fig. 6, of the sealer element which is formed from similar material to the disc 8. Resinous material may also be used to encase the driver segment to reduce friction and hence the operating torque. The unit is made to a diameter slightly greater than that of the interior of the housing so that the resinous material is compressed during assembly, the axial dimension of the top of the sealer segment corresponding exactly with the space between the bonnet 4 and the top of the driver segment. A modified construction for controlling three fluid connections is described.
Patent GB-1027567-A (GB)
Title: Process for the polymerisation of lactams
IPC: C08J9/10
Filed: 1963-10-03
Abstract: A process for the preparation of a polyamide comprises polymerizing a lactam having at least 7 ring members in the lactam ring at a temperature above the melting point of the lactam but below the decomposition temperature of the polyamide, in the presence of an anionic catalyst and, as promoter, a di-(2-lactim) ether derived from a lactam having at least 7 members in the lactam ring.  Specified lactams are e -caprolactam, enantholactam, caprylolactam and laurolactam.  Specified catalysts are the alkali and alkaline earth metals (including magnesium) and the basic reacting compounds thereof. Cross-linking agents, e.g. methylene-bis-caprolactam and isopropylidene-bis-caprolactam; fillers, e.g. sand; pigments, e.g. carbon black; blowing agents, e.g. azides and reinforcing agents, e.g. glass fibres, steel fibres, steel rods or organic fibres may also be present in the reaction mixture.
Patent GB-1148804-A (GB)
Title: Indexing device
Inventor: LEGG ERIC LOUIS
IPC: B42F21/00
Filed: 1966-09-01
Abstract: 1,148,804. Indexing devices for loose-leaf binders. TWINLOCK Ltd. 31 Aug., 1967 [1 Sept., 1966], No. 39021/66. Heading B6E. An indexing device for a multi-ring or multipost loose-leaf binder comprises a strip 1a preferably of a plastics material and of scalene triangle shape, the margin of which adjacent to the shortest side having at least two perforations 3, 3a which are spaced apart centre to centre corresponding to the closest spacing between two adjacent rings or posts. The apex of the triangle opposite to the shortest side forms a marker projection and may be truncated and rounded as shown at 7. Additional perforations 6, 6a spaced similarly to the perforations 3, 3a may be provided, in which case the spacing of the endmost perforations 3, 6a is made equal to the wider spacing between the two central rings of a four-ring binder. Two strips la may be placed on the rings with one upside down compared with the other, so that the parts 7 of the two strips occupy different positions. The strips may be differently coloured.
Patent GB-958539-A (GB)
Title: Improvements in or relating to grabs
Inventor: POND ALFRED WILLIAM
IPC: B66C1/06
Filed: 1961-11-01
Abstract: 958,539. Combined grab and magnetic lifting device. JOSEPH WESTWOOD & CO. Ltd. Jan. 2, 1963 [Nov. 1, 1961], No. 39091/61. Heading B8H. The four jaws 2 of a grab, pivoted about horizontal axes 38 to a frame 1, enclose an electromagnet 10. Links 4 open and close the jaws when the frame 1 is moved with respect to a frame 3 by a rope 6 and pulleys 5. The jaws 2 are also pivoted about vertical pins which pass through lugs 37, Fig. 3, the amount of movement being limited by V-shaped plates 42. Abutment plates 43 limit opening of the jaws. The links 4 are pivoted about vertical pins 34, Fig. 1, which pass through lugs 33. One end of the rope 6 is attached to the frame 3 and the other end passes through guide rollers 8, 9, Fig. 2 (not shown). When the jaws are fully open they are above the level of the lower face of the magnet 10 so that objects which are too large to be encompassed by the jaws may be lifted.
Patent GB-940767-A (GB)
Title: Improvements in machines for forming loops on sanitary towels
IPC: A61F13/15
Filed: 1960-11-14
Abstract: 940,767. Forming loops on sanitary towels. MOLNLYCKE VAFUERIAKTIEBOLAG. Nov. 14, 1960 [Nov. 24, 1959], No. 39101/60. Heading A5R. [Also in Division D1] A machine for forming securing loops on a sanitary towel having a tubular covering which extends beyond the absorption insert, comprises a towel support such that at least one tubular covering end hangs downwardly, a guide member for the end means for bending the end around the guide member to form a loop and means for securing the loop. Sanitary towels are disposed transversely on a track 2 which is moved step-wise by a motor driven cam shaft 12, the ends of the tubular covering hanging downwardly on each side of the track. The loop forming and securing components of the machine are duplicated on both sides of the track and are actuated by the cam shaft. On reaching a first loop-forming assembly 8, the end of each downwardly hanging part is drawn into a suction tube 9, a catch being operated to clamp the end against a side edge of the suction opening of the tube. The suction tube then moves downwardly and rotates to stretch and twist the tubular part of the towel. A fork 36 carried by a rotatable crank arm 38 is then in a lower position where it engages the tubular part adjacent the suction tube while a cutter severs the tubular part at the suction tube. The fork swings upwardly folding the tubular part on itself and around the guide member 10, which is mounted on the suction tube, to form a loop. The cut end is held against the uppermost end of the tubular part while the suction tube and guide member rotate to twist the top of the loop and thus temporarily secure it. The loop is then gripped by a gripper device 68 which is carried by a holder 72 movable backwardly and forwardly on shafts 78, 79 by a cam-guided arm 93 and sideways relative to the track by cam-guided movement of the shafts. As the towel is moved by the track towards the knotforming assembly 11, the gripper moves with it and withdraws the loop from the guide member. The knot-forming assembly 11 includes a rotatable channelled tying arm 75 and a hook 77 rockable by a cam-guided arm 118 through a link 119. By cam-guided swinging movements, the gripper winds the sides of the loop together on the tying arm and, when the tying arm has rotated so that the channel is rearwardly directed, the gripper passes the end of the loop through the channel to form a knot, releases the loop and withdraws. The hook 77 enters the loop and tightens the knot. At the same time as a knot is formed and tied on one towel, a loop is formed on another towel.
Patent GB-864927-A (GB)
Title: Improvements in or relating to shaft bearings
Inventor: LEE JAMES ALEXANDER
IPC: F16C11/08
Filed: 1956-12-28
Abstract: 864,927. Bearings. PLESSEY CO. Ltd. Dec. 30, 1957 [Dec. 28, 1956], No. 39459/56. Class 12 (1). A part spherical socket depression 2 in an electric gramophone motor frame 2, which may be closed at the bottom as shown in chain dotted lines to serve as a thrust bearing or be open as shown to act as a through bearing accommoda,tes a part spherical phosphor bronze bearing element 5 which is porous and is centrally bored to receive the journal part 6 of an armature shaft 6 the element 5 being urged within the socket 2 by means of a spring steel clip 7 of strip form. The latter, having a central opening 8 to clear the shaft 6, has a socket depression 9 to receive the upper end of the bearing element 5. At each side of the socket depression 9 the clip is corrugated, the two outer ends being sprung beneath shoulders 11 on pressedin portions 12 of the frame 1 to retain the bearing element in position. The spherical outer surface of the element 5 ensures ready alignment when the shaft 6 is fitted and allows the bearing to yield laterally under shock loads. An oil pad 13 encircles the bearing element 5.
Patent GB-1447720-A (GB)
Title: Collapsible dam and damming method
IPC: E02B7/00
Filed: 1974-09-10
Abstract: 1447720 Flexible dams N M IMBERTSON & ASSOCIATES INC 10 Sept 1974 39479/74 Heading E1H A flexible dam structure 10 comprises an outer inflatable envelope 11 with at least one smaller inflatable envelope 12 mounted within it. The upstream edges of the envelopes are mounted at substantially the same location 20 in the watercourse and the downstream edges are mounted in spaced apart locations 21, 22.
Patent GB-925048-A (GB)
Title: Improvements in or relating to transducers using piezosensitive material
IPC: H04R17/00
Filed: 1961-11-03
Abstract: 925,048. Pick-ups and recorders. GULTON INDUSTRIES (BRITAIN) Ltd. Nov. 3, 1961 [Nov. 17, 1960], No. 39500/61. Class 40 (4). [Also in Group XXXVI] A piezo-sensitive transducer comprises a plurality of piezo-sensitive elements mechanically coupled together. Fig. 1 shows one embodiment in which a piezo-electric element comprises crystals 18 and 20 provided with electrodes 22, 24, 26 and 28, mechanically and electrically joined to a metal stiffening strip 30. Attached to one side of the element is a piezoresistive element 14 also mounted on a stiffening strip 32 and provided with electrodes 40 and 42. A recording stylus 16 is attached to the transducer and the piezo-electric element is fed with the signal to be recorded whilst the piezoresistive element provides a monitoring signal. In an alternative form, the piezo-resistive element comprises two piezo-resistive members 15 and 17, Fig. 2, mounted on a stiffening strip 19 and attached to a piezo-electric element of the same form as in Fig. 1. The two piezo-resistive members being arranged in a bridge circuit, together with resistors 47 and 49, to increase the sensitivity. Transducers of the types described above may have both elements connected to separate reproducing amplifiers to give a quasistereo effect, Figs. 3 and 4 (not shown). Alternatively the piezo-resistive elements may be duplicated on the other side of the piezo-electric element to give a three-channel output, Figs. 5 and 6 (not shown).
Patent GB-1117530-A (GB)
Title: Pyrolysis of fluoroform
IPC: C07C17/386
Filed: 1965-09-20
Abstract: Tetrafluoroethylene and/or hexafluoropropene are produced by pyrolysing fluoroform by a process wherein the total one pass conversion of fluoroform into other products is maintained at or below 65% and wherein hexafluoroethane is added to the fluoroform feed to the pyrolysis zone in an amount sufficient to maintain the C2F6 concentration in the feed equal to the C2F6 concentration in the effluent product stream from the pyrolysis zone.  Preferably the C2F6 added to the fluoroform feed is obtained by recycling by-product C2F6 separated from the pyrolysis product.
Patent GB-1322544-A (GB)
Title: Mobile railway tracklaying appliance
IPC: E01B27/11
Filed: 1970-08-21
Abstract: 1322544 Relaying railway track F PLASSER 21 Aug 1970 [7 Oct 1969] 40342/70 Heading E1G A track-relaying train includes an intermediate portion of interlinked appliances for track removal and renewal pivoted to forward and rearward portions carrying old or new sleepers and/or rails. As shown, the forward rail-borne vehicle 3 for transporting old sleepers has pivoted to it a supporting arm 11 which carries the device 12 for taking up the old sleepers. The supporting arm 11 is connected by an hydraulic jack 18 to the chassis 16 of the ballast cleaning arrangement which runs on crawler tracks 17 on the track bed. The other end of the chassis 16 is connected by another hydraulic jack to a second supporting arm 11 carrying a device 32 for laying new sleepers. The second supporting arm is pivoted to the rearward rail-borne vehicle 26 for transporting the new sleepers. The ballast cleaning arrangement includes a chain conveyor 19 which feeds surplus ballast to a hopper from whence it is transferred, via a conveyor 74, to a further hopper 25. In alternative embodiments described, the intermediate portion may include a bar framework whose length is adjustable. The framework may be articulated and may carry various parts of the track renewal system.
Patent GB-932064-A (GB)
Title: Means for conveying granular or pulverulent materials in bulk transporting vehicles
IPC: B60P1/40
Filed: 1959-11-27
Abstract: 932,064. Discharging vehicles; pneumatic conveyers. R. MURFITT. Feb. 27, 1961 [Nov. 27, 1959], No. 40482/59. Classes 78 (1) and 78 (4). Granular or pulverent material in hoppers of bulk transport vehicles &c. is fluidized for unloading by passing air through permeable units attached or inserted in a trough or recess at the rear of the vehicle. In an example, applied to removal of material from the rear end of a tipping vehicle container 2, Figs. 2, 5, domeshaped permeable units 3 are bolted to the face of sheet metal shoot plates 7, 7<SP>1</SP>, 16, forming the trough into which the material slides to an outlet 1 at the base. Augers 10 arranged diagonally across the rear recess may be used during the final stages of emptying and may be shrouded to control the flow. The air permeable units may be of various forms such as rectangular or conical and as shown at 29, Fig. 6, may be dome-shaped with a central stem which is bolted at 30 to the hopper wall and fed with air through branch pipes 31. Alternatively, the units may have Additional air permeable units may be arranged hollow stems through which the air is supplied. on the floor of the vehicle.