baber/WOPTO huggingface dataset:
Patent GB-484364-A (GB)
Title: Improvements in devices for relieving precision screw spindles from the efforts acting thereon during operation of the spindle
IPC: B23Q1/30
Filed: 1937-05-24
Abstract: 484,364. Actuating machine slides. SOC. GENEVOISE D'INSTRUMENTS DE PHYSIQUE. May 24, 1937, Nos. 14362 and 14363. Convention dates, July 3, 1036 and Feb. 12, 1937. [Class 83 (iii)] [Also in Group XXIV] In a device for relieving wear on the operating screw of vertical machine tool slides, the screw drive actuates hydraulic gearing to supply fluid to a cylinder to exert a force on the slide during movement in opposition to the weight of the slide. In Fig. 1 a slide 1 is moved along guides 2, 3 by a screw 5 which rotates in a nut 8 fixed to the slide and which may be rotated by a motor 6 through gears 7. The motor 6 also drives a pump 9 delivering fluid at a pressure determined by a valve 12 to a hydraulic cylinder 11 the piston 18 of which is secured to the slide. The hydraulic pressure moving the slide upwards may be slightly greater than the weight of the slide so that the contact is transferred from the thread flanks, shown engaged in Fig. 2, which normally determine the slide position, to the opposite flanks. The hydraulic relieving force is not used during fine adjustment of the slide, which is manually effected by a wheel 13 and micrometer head 14. If it is essential to maintain the precise screw determined movement of the slide the hydraulic relieving force may be slightly less than the weight of the slide. In a modification, the screw may extend into a recess in the piston. In another modification the electric motor is connected to the screw through a clutch which is engaged only when a predetermined hydraulic pressure exists in the cylinder 11 so that the screw does not start to turn until the pressure on the threads has been relieved. In another modification, Fig. 5, the electric motor 30 driving the screw is connected through a switch 53 and a commutator 40 to a power supply which is also connected to a motor 43 driving the pump 44 which delivers to the relieving cylinder 32 and also to a switch cylinder 50 and a brake-relieving cylinder 39. The slide when stationary is braked by a shoe 36 on a lever 34 urged by a spring 37. When the motor 43 is started a coil 48 is excited to close the valve 49. The pump pressure then actuates the cylinder 39 to disengage the brake against the spring 37 and the cylinder 50 to engage the switch 53 of the motor 30 so that the screw 28 is driven. When the current is switched off by the commutator 40 the motors 30 and 43 both stop, and the valve 49 opened so that the switch 53 is disengaged and the brake 36 is reapplied. Liquid can escape from the cylinder 39 only through a narrow passage 55, the non-return inlet valve 54 being closed so that the return movement of the brake lever 34 is retarded. The motor 30 may be reversed by means of the commutator 40.
Patent GB-933259-A (GB)
Title: Improvements in or relating to a tape printer and to a tape for use with such a printer
IPC: B41J31/16
Filed: 1961-04-20
Abstract: 933,259. Typewriters. MITE CORPORATION. April 20, 1961 [May 12, 1960], No. 14397/61. Class 100 (4). [Also in Group VIII] A paper carbon web (see Group VIII) of a width to receive a single line of printed matter, is of a light colour so that by arranging for the web to cross over itself the back of the web which is coated with the transfer material may print on the light colour. The one web thus serves as both the carbon paper and the second web and is fed downwardly at 52 past a hammer 60 with the carbon or inking surface towards a type wheel 66. Between the carbon and the wheel is a horizontal length 58 of the web with the light colour surface available to receive the impression. The arrangement allows the printed impression to be seen immediately. Feeding of carbon and record web.-The combined web is fed on the return stroke of a printing hammer 62 by a ratchet and pawl mechanism driving gears 74, 76 having plane friction surfaces 70, 72 co-operating with spring-biased rollers 78, 80. The incoming web may also be fed by similar rollers 108, 110 and surfaces 100, 102. Machines having positive or reversed type.- The type-wheel is rotated and axially shifted to select a character and is positioned behind the web which receives the impression from the hammer 60 situated in front. Specifications 786,831 and 799,956 are referred to.
Patent GB-352156-A (GB)
Title: An improved friction drive and brake for printing and embossing presses
IPC: B41F13/00
Filed: 1930-05-10
Abstract: 352,156. Band brakes applied by driving-mechanism disengagers. ROCKSTROH, W., 3, Wissmannstrasse, Dresden, Germany. May 10, 1930, No. 14475. [Class 103 (i).] In combined clutch and brake drives adapted to effect powerful clutching and rapid emergency stoppage of heavy printing and embossing presses, the driving-flywheel (not shown) is coupled to the shaft 1 by a selftightening band-clutch 5. The brake-band 11, anchored at one end 12 to a fixed part, coacts with a drum (not shown) carried by one or more arms 9 on a shaft-member 8, and is expanded by a tangentially-moved rod 24 contacting with the free end 25 of the band. The rod 24 is coupled to the clutchlever 17, which has connections 14, 15, 16 to a sliding collar acting to expand the clutch-band 5.
Patent GB-1215000-A (GB)
Title: Pipe coupling
Inventor: PADDINGTON ARTHUR LOFTUS
IPC: F16L37/12
Filed: 1967-03-30
Abstract: 1,215,000. Pipe couplings. DRACONE DEVELOPMENTS Ltd. 13 March, 1968 [30 March, 1967], No. 14537/67. Heading F2G. A coupling unit for mounting on a pipe end or manifold comprises a tubular part 1 having a number of radially extending projections 2 each provided with an aperture through which extends a claw member 17 that is pivotally secured to a ring 8. Means for moving the ring to and fro on the part 1 are provided. The apertures in the projections are so located radially of the part 1 in relation to the pivot points 22 of the claw members and in relation to the inclinations of the inner and outer profiles 33, 25 of the members which respectively engage the inner and outer margins of the apertures, that the claw ends 23 of the members are held outwardly from the axis of the part 1 when the ring 8 is near to the projections 2 and are moved radially inwards towards that axis and axially towards the end of the part 1 when the ring is moved away from the projections; the latter movement of the ring causes the claws to grip an annular flange 26 of a pipe 27 to bring the face of the flange in sealing relation with the end face of the part 1. As shown, the ring 8 is screwed internally and is in engagement with the external screw-thread of a sleeve 4 rotatable, but restrained axially, by a hand wheel 29. A dovetail groove 35 houses a pair of rubber sealing rings 34, 39 having respectively inwardly and outwardly directed lips and being held in the groove by a retaining ring 37 which regulates the degree to which the lips are compressed; alternatively, the sealing rings are moulded as a single ring grooved centrally to receive the ring 37. In modifications, (a) the ring 8 is moved by hydraulic rams, there being a latch member which normally rests on the outer rim of the flange 2 but which locks the sleeve 4 when the flange 26 meets the ring 37, and (b) the sleeve 4 carries a worm-wheel rotated by a worm mounted on the shaft of a reversible, hydraulic pneumatic or electric, rotary motor.
Patent GB-913110-A (GB)
Title: Improvements in or relating to wells
IPC: C09K8/16
Filed: 1960-04-26
Abstract: 913,110. Wells. CONTINENTAL OIL CO. April 26, 1960 [Dec. 4, 1959], No. 14575/60. Drawings to Specification. Class 85. A well fluid comprises an aqueous solution of calcium chloride and zinc chloride having a density of 11 to 17 pounds per gallon. The fluid contains a corrosion inhibitor, and is used to fill the well casing during perforating and servicing, or is used as a packer fluid above the upper packer in a multi-completion well.
Patent GB-354402-A (GB)
Title: Improvements in and relating to the manufacture of chenille fabrics
IPC: D03D39/00
Filed: 1930-05-13
Abstract: 354,402. Chenille. POZ‡R, F. A., Ceskß Belß u Nem. Brodu, Czecho-Slovakia. May 13, 1930, No. 14666. [Class 142 (iv).] The preparatory cloth has wefts c bound in by stranded warps d, d<1> each consisting of six strands twisted together between the wefts. The cloth is cut at f so that each chenille strip has its wefts bound in by a pair of the stranded warps. The strip is folded at the middle, and the carpet prepared therefrom exhibits the pattern both on the face and at the back.