| 摘要 |
<p>1343646 Gauging stops; punching; stamping F DANN and C-F BERGNER [trading as RICHARD BERGNER] 6 May 1971 [8 May 1970] 13427/71 Headings B3W B3B and B3Q [Also in Divisions G1 and G4] A machine tool carries an indicator head consisting of two blind bores into one of which pressure is injected and from the other of which pressure escapes and which are connected by a third bore, the arrangement being that a pressure detector, e.g. a counter, is operated by the pressure escape from the second bore according to whether the third bore is blocked or unblocked. In the arrangement shown in which a cutter 8 severs lengths of wire 3, the wire is advanced until it blocks the third bore 4 when pressure entering at 30 and normally escaping through the third bore 4 operates a counter at 31. The head may be used to indicate the feeding of any strip material to an upsetting machine or cutting machine. In the arrangement of Figs. 3 and 4 (not shown), the passage of a head of a screw is used to block the third bore so operating a counter, while in the arrangement of Fig. 5 (not shown) the three bores are carried in the movable part of a stamping tool and the third bore is blocked by its approach to the work. In the arrangement of Figs. 6 and 7 (not shown), the three bores are carried in a cutting punch (20), the third bore, normally terminating within the punch, being opened to atmosphere if the tool breaks. In this case there is normally an escape of pressure through the second bore that ceases when the third bore is opened.</p> |
