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    • 1. 发明专利
    • Improvements in and relating to drain rod grapples and the like
    • GB551037A
    • 1943-02-04
    • GB1524141
    • 1941-11-26
    • THOMAS KIRBY
    • E03F9/00E21B31/18
    • 551,037. Friction grip fastenings. KIRBY, T. Nov. 26, 1941, No. 15241. [Class 44] [Also in Group XXX] A drain-rod grapple comprises a ring of jaws 4 pivoted on pins or bolts 3, each jaw having a gripping zone 8 adapted to co-operate with the corresponding part of the next jaw to grip a rod thrust between them, the gripping edges moving apart when pressure is applied to them by the rod and being returned by springs so as to grip the rod. In the construction shown the grapple is mounted on a central member 1 to which a ring 2 is secured by bolts 3, 11. The jaws 4 are four in number, are J- shaped, and are pivoted on the bolts 3. Springs 12 connected to the bolts 3, 11 pass through holes 13 in the jaws and tend to keep them in a central position. The jaws are provided with bevelled or knife edges to form gripping edges and their outer parts 5 are also bevelled at 6 so as to assist in guiding a drain-rod end towards the space between two adjacent jaws. In use the grapple is thrust into the pipe or drain until the free end of a lost drain-rod is reached, this end being guided by the bevels 6 into the space between two jaws. Further forward movement of the grapple causes the jaws to open until the ferrule on the drain rod passes through the jaws. The grapple is then withdrawn, the jaws either gripping the rod itself or jamming against the inner end of the ferrule so that the rod is securely gripped and is withdrawn with the grapple.
    • 4. 发明专利
    • Improvements in or relating to caps for typewriter keys
    • GB640017A
    • 1950-07-12
    • GB1719147
    • 1947-06-30
    • JOHN OSCAR VERNONLESLIE THOMAS KIRBY
    • B41J5/12
    • 640,017. Typewriters &c. VERNON, J. O., and KIRBY, L. T. June 30, 1947, No. 17191. [Class 100 (iv)] A cap for a typewriter key made from resilient synthetic resin comprises an open based body 7 of substantially cylindrical form adapted detachably to receive the key button 1 and an integrally formed closed top 8 disposed below the rim of the cylindrical portion and at least one inwardly directed flange 9 or 11 being provided on the body portion. The closed top 8 is, as shown, domed to afford inherent resiliency but in a modification the top 8 is made of thin flat material and resilience achieved by an air pocket formed between the undersurface of top 8 and the key button. The upper surface of the top 8 may be moulded, printed, or embossed with the required letter, or a disc 10 made of cellulose acetate or like material bearing a printed or embossed symbol, may be detachably fitted below a flange 9. In further modifications the symbol bearing disc may be made from the same material as the cap, viz. polyvinyl chloride, and the closed top 8 thickened so that the cap can fit on a plain disc on the end of a key lever and the cap itself form the key button.