Drive disc for displacement or regulating valves - has individualy fitted control surfaces and/or reversing ratchet on driving disc

摘要

The drive mechanism includes an operating lever, a shaft at least one drive disc with a control cam edge and a chain sprocket for a remote drive. The interchangeable components give a compact construction. the sprocket wheel n8) has push fittings n14) that are actuated by a left and/or right mounted operating lever on a shaft (5). Control surfaces can be attached as required to the push fitting (14). The push fittings and control surfaces fit on spigots (15, 16, 17, 18) and can be held in position by a screw (28). Instead of a simple control surface, a reversing ratchet (22, 23) can be fitted on a clearance piece (19) with a tensioning spring (21) fitted to the outer spigots (17, or 18). A cover plate (26) then fits over the top.