baber/WOPTO huggingface dataset:
Patent GB-1229926-A (GB)
IPC: B60T13/14
Filed: 1968-06-14
Abstract: 1,229,926. Brakes. GIRLING Ltd. 3 June, 1969 [14 June, 1968; 10 May, 1969], Nos. 28297/68. Heading F2F. A master cylinder of the type which receives outside pressure from a normally closed valve 43 on movement of a rod 14 which also serves to close a normally open valve 42 connected to a reservoir, has a main piston 12 and an additional piston 24 which is connected to the rod 14 and which has a non-return valve and a slow return leak. This prevents the admitted highpressure fluid acting on the second piston and causing judder on the actuating rod. The valve may comprise a flexible disc 31 or a spring- loaded plate. The rod 14 has limited sliding movement in the piston 12 determined by head 17 sliding in rebate 18 in the piston. The leak may be provided by making the flange 28 of the second piston loose in the bore 11 or by providing a bleed passage in the flange (Fig. 7, not shown). Holes 30 in this flange are sealed in one direction of flow by a flap 31. A strong spring 34 acts between the second piston and a shroud 33 while a weak spring acts on the other side of the shroud. This shroud serves to operate the valves 42, 43, the first being normally held open, as shown, to connect a first pressure space 44 to a reservoir. The other valve 43 is opened, while the first is closed by axial movement of the rod to connect pressure, through the space 44, to a duct 48 leading to a slave cylinder. A second pressure space 49 is connected to a secondary brake circuit through port 51. When the rod 14 is moved by rod 22, the lost motion with respect to piston 12 is taken up while the valves are operated as described. The pressure also serves to close the recuperation valve 52 of the secondary piston 45 to move it to pressurize space 49. Movement of piston 24 away from the main piston due to the lost motion being taken up, causes flow of fluid through the valves to the space between these pistons. In a modified form (Figs. 8-10, not shown) the main piston (17) is rigid with the shaft 14 and works in a cylinder of reduced diameter, and the piston assembly 24 is omitted and the strong spring 34 acts directly on the main piston. In this form, the shroud 33 forms the second piston and is provided with the non-return valve. The operation is otherwise the same.
Patent GB-1229999-A (GB)
IPC: F16F1/18
Filed: 1968-08-16
Abstract: 1,229,999. Leaf spring suspension. CRANE FRUEHAUF TRAILERS Ltd. 16 Aug., 1968 [30 Oct., 1967], No. 39240/68. Heading B7D. A leaf spring suspension comprises a main leaf 31 engaging, adjacent its bent;over ends, wear plates 18, 23 mounted on front and rear hanger brackets 15, 22 affixed to a side frame member 12, additional leaves 32, 33, and an eye leaf 34, secured at one end with the other leaves to an axle 26, the eye 46 being forcibly moved into and secured to the front hanger bracket 15 through pressurized elastomeric bushings 21 to prestress the spring leaves. The leaves 31, 32, 33 have central apertures surrounded by a raised lip 36, Fig. 3, to prevent relative movement and to locate pads 37 of plastics material. The spring is anchored to the axle 26 by means of a seat 27, a saddle 38 and U-bolts 41. The eye 46, Fig. 4, has tapered inner surfaces 47 and a central cylindrical surface 48, engaged by a sleeve 49 to locate the pair of bushings 21 which together with sleeves 51 are inserted through sleeves 19 in the hanger bracket 15 having tapered walls corresponding to the tapered surfaces 47. A sleeve 52 extends through sleeves 49, 51 and its ends are lapped over washers 53.
Patent GB-1230770-A (GB)
IPC: F16F15/32
Filed: 1967-08-31
Abstract: 1,230,770. Correcting for unbalance. W. & T. AVERY Ltd. 3 Sept., 1968 [31 Aug., 1967], No. 39777/67. Heading B3B. The amount of unbalance in a crank-shaft is measured, Á by a dynamic unbalance detector, and then a drill having a constant speed and feed removes material from the crank-shaft in accordance with the measurement. The drive to the drilling head is controlled by a timing device which permits the drill to operate for a predetermined period according to the setting of a graduated scale. In a modification, the timing device is replaced by a revolution counter. In order to eliminate errors caused by wear of the drill, and variations in the workpiece shape, the time is actuated by a switch, responsive to the pressure of the drill on the workpieee. The calibration of the scale is non-linear so as to allow for variation in the hole caused by the conical drill end, and also the variation of unbalance as the drill nears the centre of gravity of the workpiece.
Patent GB-1231006-A (GB)
IPC: G01N25/08
Filed: 1968-02-16
Abstract: 1,231,006. Ebulliometric molecular weight determination. IMPERIAL CHEMICAL INDUSTRIES Ltd. 27 Jan., 1969 [16 Feb., 1968], No. 7773/68. Heading B1X. In an ebulliometric method for the determination of the molecular weight of a substance in solution, separate continuous streams of the solution and pure solvent are respectively produced in two pieces of stainless steel tubing P which is spirally wound around glass tube G, the streams being heated while being conducted down along the spiral by exchange with an atmosphere saturated with respect to solvent vapour at a given pressure so that the streams are substantially heated to the boiling temperature of the pure solvent at that pressure, the streams finally being distributed as thin liquid films over two symmetrical upwardly-projecting, thin-walled glass tubes J where the seperate films of solution and pure solvent are brought into thermal equilibrium with the saturated solvent atmosphere by direct contact therewith, and the difference in temperature between the films of solution and pure solvent is measured by means of thermistor beads K and resistors M connecting up via electrical connections N to the four nodes of a Wheatstone bridge circuit. A constant saturated solvent atmosphere is maintained in envelope E by keeping a quantity of pure solvent D at its boiling point by means of electrical heating element C, vapour tight closure E carrying an exit tube F for solvent vapour leading to a reflux condenser. Before a determination is carried out, the glass chamber I, to which tubes J are sealed, is evacuated by means of tube G and cock H. Hypodermic syringes Q are used to provide a steady liquid stream rate of about 0.5 me/w in tubes P. During the course of a determination the streams of solution and solvent running over tubes J are collected in cavities S. Thermistor beads K are provided with good thermal contact by tubes J by means of silicone grease L. Shielding walls R are employed to protect tubes J from vapour draughts.
Patent GB-1233761-A (GB)
IPC: B64D17/22
Filed: 1968-07-04
Abstract: 1,233,761. Safety harness. A. GINGELL. 9 June, 1969 [4 July, 1968], No. 31938/68. Heading A3V. [Also in Division B8] A safety harness for use in e.g. sea rescue operations comprises integral seat and jacket portions 29, 1, 7, the seat portion 29 being provided with a pair of rings 31 at the sides by which the harness may be suspended from a spreader bar by a pair of ropes or wires and the jacket portion 1, 7 having pockets 3, 5 containing a buoyant material e.g. kapok, a closed-cell plastic foam, or. inflatable air bags. The jacket portion 1, 7 comprises back member 1 and two front members 7, forming a waistcoat-shape, the members 7 being fastened across the front of the wearer by means of straps 9 passing through rings 13 adjacent the bottom of the back portion 1 and tied off at loops 15 on adjacent edges of the members 7. The seat portion 29 is joined at the edge 27 to a curved edge 25 on a lower back portion 21 attached along edge 23 to the back portion 1. A bib 37 is attached to the free edge of the seat portion 29 and has at its upper edge a pair of straps 41 which are attached to straps 47 on the back portion 1 by quick-release catches 43, 45. Hooks 33 attached to the back portion 1 by straps 35 provide freerunning connections with the ropes or wires. Straps 49, crossing each other on the seat portion 29, and strap 53 reinforce the seat and bib portions 29, 37.
Patent GB-1250280-A (GB)
IPC: B60S1/08
Filed: 1969-09-22
Abstract: 1,250,280. Control of motors. NIPPON DENSO K.K. 22 Sept., 1969 [21 Sept., 1968; 25 Sept., 1968], No. 46513/69. Heading H2J. [Also in Divisions A4 and G1] A windscreen wiping system comprises a moisture detector 21 connected via an amplifier 15, 16 to a switching relay 12, 13 controlling a drive motor 10 for the wiper or wipers, whereby the motor 10 is energized when the windscreen is wet, and a time delay device 17, 18 for maintaining the switching relay energized for a predetermined time after the moisture detector returns to its dry state. The delay device comprises a capacitor 18 which is charged via resistors 22, 23, 17 and the moisture detector 21 when the transistors 15, 16 are rendered conducting by the moisture detector 21, and when the moisture has been removed from the latter the capacitor 18 discharges to maintain the transistors 15, 16 conducting and the motor 10 energized for a desired period. A further moisture detector 37 may be provided which is ineffective during light rain, but during heavy rain causes an amplifier 35, 36 to energize a relay 34 to actuate a switch 11 for operating the motor 10 at a higher speed. The moisture detector 21 may comprise spaced conductive foils 29, 30 (Fig. 2, not shown), arranged on the windscreen with conductive foils arranged therebetween and spaced by air gaps. The two moisture detectors 21, 47 may have a common electrode. Alternatively the moisture detector 21 may comprise a disc 42 (Fig. 5, not shown) rotated by an electric motor controlled by the switch 12 and comprising inter digitated conductive elements spaced by an air gap.
Patent GB-1251480-A (GB)
IPC: H01H73/02
Filed: 1970-08-12
Abstract: 1,251,480. Automatic circuit breakers. WESTINGHOUSE ELECTRIC CORP. 12 Aug., 1970 [17 Sept., 1969], No. 38785/70. Heading H1N. An automatic circuit breaker has a separate movable contact arm 29 for each of its poles, which arms are mounted on a common rotatable tie bar 33 having a metal core 101 with an insulating covering 103 and trunnions 105 extending from the metal core to engage respective insulating bearings in the insulating housing 7 of the circuit breaker. Flat, metal locking plates 125 are secured to the base 11 of the housing to lock the bearings and hence the tie bar, against upward movement. The insulating, base 11 and cover 13, have respective insulating barriers 17 and 15 which define the three pole unit compartments. A releasable trip member 57 is normally held in latched position by latch mechanism 61 unless tripped by a thermal and magnetic device 85, via trip bar 83 common to all the poles, on the occurrence of an overload. Manual operation of the circuit breaker is by means of handle 77  which when moved anticlockwise collapses the toggle linkage 63, 65, to open the contacts 23, 19, under the action of springs 73.
Patent GB-1251708-A (GB)
IPC: F16D21/06
Filed: 1969-05-27
Abstract: 1,251,708. Friction clutches. G.K.N. BIRFIELD TRANSMISSIONS Ltd. 11 May, 1970 [27 May, 1969], No. 26607/69. Heading F2C. To ensure that the spring means in a spring- engaged friction plate clutch exerts a substantially constant engaging force, and hence that the release pressure remains constant throughout the range of wear of the clutch, the spring means includes a first spring, e.g. a coil spring, exerting a thrust which increases with its compression and a second spring, e.g. a Belleville type dished washer, selected to operate over that range in which the thrust decreases with increasing compression. As shown, the springs 18, 21 act to separate the pressure plates 16, 17 in a dual clutch. The pressure plate 16 is moved to release the clutch by levers 27 pivoted at 29 and connected to the plate by links 34. Plate 17 is controlled by a second set of levers (28), Fig. 2a, (not shown), each carrying a roller (36) abutting a stud (37) on the plate to move it axially.
Patent GB-1252905-A (GB)
IPC: H03K3/00
Filed: 1968-05-17
Abstract: 1,252,905. Pulse generators. MARCONI CO. Ltd. 20 March, 1969 [17 May, 1968], No. 23551/68. Heading H3T. A high voltage pulse generator for a klystron or magnetron is powered by relatively low voltage A.C., rectified at RU, the rectifier providing an output with a floating potential for a circuit comprising a charging inductance C1, a pulse forming network PN and one or more electronic switches SW1 ... SWn, preferably thyristors, which are triggered to supply pulses to a step-up pulse transformer whose secondary winding PS is electrostatically screened from the generator by an earthed screen ES. This allows the pulse generator to operate at low voltage, thus reducing insulation requirements. The pulses may be stabilized in amplitude by a coil coupled to C1 in series with a thyristor which is triggered when the voltage across PN exceeds a predetermined value. The elements of the generator are enclosed in unearthed interconnected electrostatic screens FS. Voltages at points in the generator may be compared with a reference voltage source, e.g. a Zener diode in a screen FSM1, by a multi-way switch DSW which feeds the voltages to a chopper comprising a transistor ST switched by a waveform generated at WS. The output of the chopper is fed to a transformer whose secondary is screened by an unearthed screen FS1 and an earthed screen ES1. The output is rectified at R and measured at MO.
Patent GB-1256766-A (GB)
IPC: G01L9/08
Filed: 1969-08-06
Abstract: 1,256,766. Load cells. STOW LABORATORIES Inc. Aug. 6, 1969 [Aug. 7, 1968], No.39418/69. Heading G1N. A load cell comprises a semi-conductor junction stressed via a stylus supported by a diaphragm, the load being applied other than directly at the stylus. As shown, Fig. 2 a semi-conductor element 30, mounted on a block 31, is contacted by a stylus 34 attached to the centre of a diaphragm 38, covered by a dome 45. Openings 40 are formed in the diaphragm so that the load on element 30 is the differential pressure on the inner and outer surfaces of dome 45. For measuring weight, the dome may have a discontinuous surface Fig. 5, (not shown), or is replaced by a second flat diaphragm Fig. 6 (not shown) supported on diaphragm 38 at three points. In one embodiment, Fig. 9, the dome 61 is provided with dimples 62, 63 which contact studs 56, 57 on diaphragm 38 at a predetermined load, to give different output characteristics from the transducer above and below this load value.
Patent GB-1258335-A (GB)
IPC: F16L5/00
Filed: 1969-04-10
Abstract: 1,258,335. Passing pipes through walls. VEREINIGTE FLUGTECHNISCHE WERKEFOKKER G.m.b.H. 10 April, 1969 [10 April, 1968], No. 18521/69. Heading F2G. [Also in Division H2] A composite bush for carrying a plurality of pipes or electric cables through a wall aperture comprises moulded members 1 and 2 adapted to embrace the pipes or cables and provided with wall-anchoring projections 6 and 7 on either side of peripheral bush surface 4 for engagement with the edge of the aperture, and a resilient intermediate member 10 adapted to urge said members apart against the aperture edge and to urge the pipes or cables against one or other of the ports. In order to accommodate various wall thicknesses, metal foil inserts 8 may be provided between the projection 6 and the wall. The members 1 and 2 may be of an electrically conductive material to establish an earth connection between the pipes or cables and the wall. The bush construction enables the bush to be positioned around the pipes or cables subsequent to passing the latter through the aperture, and engaged with the aperture by squeezing members 1 and 2 together sufficiently to permit the projections 7 to pass through the aperture. In another embodiment, Figs. 3 and 4 (not shown), the pipes or cables are located in one of the members only. In further embodiment, Figs. 5 and 6 (not shown), the members 1 and 2 include interchangeable inserts 13 in which the pipes or cables are located to enable the bush to be adapted to suit different combinations of pipes or cables of different diameters, said insert being of electrically conductive material.
Patent GB-1259002-A (GB)
IPC: B41L11/00
Filed: 1969-03-13
Abstract: 1,259,002. Printing apparatus. A. A. J. HUNTER. 18 Feb., 1970 [13 March, 1969], No. 1844/69. Heading B6C. A hand-operable device for printing an address or other matter by the spirit transfer method on a sheet 18, comprises (a) a chassis 1 pivoted at one end about the axis 4 of a roller 2 and having a handle 7 at the other end, and (b) a housing 3 also pivoted about the axis 4 and supporting a reservoir 8, a wetting roller 5 and a wick 10 between the reservoir and the roller 5, coil springs 13 about the axis 4 tending to depress the housing 3 and to raise the chassis 1. In operation, the apparatus is placed on the sheet 18 to be printed, and the hectograph master sheet 19 is introduced to the machine as shown after pressure has been applied to the handle 7 to depress the roller 6. The apparatus is now moved to the left so that the sheet 18 is wetted by the roller 5 and applied to the master sheet 19 by the roller 6. The master sheet may be in the form of a label detachable from a strip of such labels before an address is typed thereon.
Patent GB-1264433-A (GB)
IPC: C02F1/14
Filed: 1970-04-28
Abstract: 1,264,433. Preventing condensation. R. DELANO and C. J. RASEMAN. 28 April, 1970 [22 May, 1969], No. 20227/70. Heading B2E. Condensation on the internal surfaces of enclosed structures such as green houses, swimming pools and solar stills said surfaces being of plastics material is prevented by applying a formulation consisting of 0.2-4 vol% of colloidal alumina, less than 0.5 vol% of an anionic or non-ionic surfactant and the balance being water and optionally an antifoam agent. The structures may be made of flexible or rigid plastics sheets e.g. polyvinyl chloride, polyethylene, polystyrene or acrylic resins. The formulation may be applied by spraying, padding or rollers and may include 0.01-0.06 vol% of anti-foam agents e.g. silicone emulsions. Suitable surfactants are trimethyl nonyl polyethylene glycol ether, sodium 2-ethylhexylsulphate, nonyl phenoxy polyethylene oxyethanol and polyethylene glycol ether of linear alcohols. The formulation may be applied hot (above 160‹F) or cold followed by subsequent heating of the substrate.
Patent GB-1264918-A (GB)
IPC: C09C3/00
Filed: 1970-09-14
Abstract: 1,264,918. Microcapsules. NATIONAL CASH REGISTER CO. 14 Sept., 1970 [26 Sept., 1969], No. 43778/70. Heading B8C. Microcapsules each composed of a substantially water-insoluble nucleus surrounded by a polymeric capsular wall are prepared by dispersing the nucleus material in an agitated aqueous solution of at least one organic, hydrophilic, film-forming polymer and at least one inorganic polymeric material, causing coacervation of the polymers which, on separating, deposit around the nucleus particles to form a liquid polymeric wall which is solidified by cooling. Thereafter, the microcapsules may be separated, dried and/or chemically hardened. Suitable organic polymers are gelatine, polyvinyl alcohol and polyvinyl-pyrrolidone. Suitable inorganic polymeric materials are water soluble polyphosphates, polysilicates, polymolybdates and polytungstates. The nucleus material may be a solid or an oil.
Patent GB-1265862-A (GB)
IPC: B21D19/04
Filed: 1969-07-22
Abstract: 1,265,862. Corrugating. GROTNES MACHINE WORKS Inc. 22 July, 1969 [26 July, 1968], No. 36845/69. Heading B3E. Apparatus for forming circumferential grooves 12, Fig. 6, and a radially inward extending flange 13 at or adjacent one end of a helically corrugated metal pipe 15 comprises a pair of co-operating forming rolls 21, 22 carried on a frame 17, a ram 24 for reducing the distance between the rolls and for applying pressure to completely deform the pipe end disposed therebetween, a drive 23 for rotating the rolls and pipe through a single revolution, a guide plate 25 interposed between the rolls and frame extending outwardly and upwardly from the rolls and being dimensioned such that abutment of the end of the pipe to be deformed against the plate ensures production of a continuous radial flange 13 at the pipe end. In operation the pipe end is inserted between the rollers 21, 22 and held against the guide plate 25 so that no more than 3 high points N on the pipe contact the plate 25. The roller 21 is moved downwardly until there is bottoming of the roller and the pipe is then rotated through one revolution such that the helical corrugations screw towards the roller mechanism.
Patent GB-1287881-A (GB)
IPC: B23G1/32
Filed: 1968-06-27
Abstract: 1287881 Cutting and grinding screwthreads E J PRICE 29 Sept 1969 [27 June 1968] 30662/68 Headings B3D and B3K Apparatus for milling or grinding internal or external screw threads comprises a rotatable work support attached to one element of a coaxial screw and nut assembly, the other element being held stationary, guide means comprising relatively rotatable cylindricalmembers arranged coaxially with the work support and having one member attached to the work support for movement therewith and the other member held stationary and means for presenting a rotary cutting or grinding tool to a stem portion or a hole in a workpiece mounted on the work support. The tool may be arranged to move laterally in dependence upon axial movement of the work support to provide taper threads. A hob-type cutter or grinder may be used so that a corresponding length of thread may be cut with rotation of the work amounting to little more than one complete turn. The work support may be manually rotatable or motor driven through a worm and worm wheel drive.