Valve actuator two rotor three position indicator

A visual indicator for a valve actuator that is attached directly to the outer ends of at least two rotors connected to the geared limit switch of said actuator, comprising:

• (a) a first end cap attached to rotate with the end of a first rotor;
• (b) a second end cap attached to rotate with the end of a second rotor;
• (c) a first, circular hub plate concentric with and adjacent to said first end cap, and having a first open area therein of predetermined angular dimensions;
• (d) a second, circular hub plate concentric with and adjacent to said second end cap, and having an open area therein of substantially equal predetermined angular dimensions as the first open area;
• (e) a first drive lug rotatively connected to said first end cap to oscillate within the first open area;
• (f) a second drive lug rotatively connected to said second end cap to oscillate within the second open area;
• (g) a first predetermined number of gear teeth, attached to an outer circumferencial edge of said first hub plate;
• (h) an idler gear arranged to be in meshing relationship with said gear teeth;
• (i) a drive gear arranged to be in meshing relationship with said idler gear, said drive gear carrying an indicator pointer;
• (j) a second predetermined number of gear teeth attached to the outer circumferencial edge of said first hub plate;
• (k) a third predetermined number of gear teeth attached to an outer circumferencial edge of said second hub plate in meshing relationship with said second number of teeth;
• (l) a housing to provide stability for said hubs and related components, said housing including an indicator scale arranged to cooperate with said pointer to indicator valve position;
• and
• (m) a tension spring fixed at one end to said housing and at the other end to a predetermined point on said first hub plate.

A visual indicator for a valve actuator that is attached directly to the outer ends of at least two rotors connected to the geared limit switch of said actuator, comprising;

• (a) a first end cap attached to rotate with the end of a first rotor;
• (b) a second end cap attached to rotate with the end of a second rotor;
• (c) a first, circular hub plate concentric with and adjacent to said first end cap, and having a first open area therein of predetermined angular dimensions;
• (d) a second, circular hub plate concentric with and adjacent to said second end cap, and having an open area therein of substantially equal predetermined angular dimensions as the first open area;
• (e) a first drive lug rotatively connected to said first end cap to oscillate within the first open area;
• (f) a second drive lug rotatively connected to said second end cap to oscillate within the second open area;
• (g) a first predetermined number of gear teeth attached to an outer circumferencial edge of said first hub plate;
• (h) an idler gear arranged to be in meshing relationship with said gear teeth;
• (i) a drive gear arranged to be in meshing relationship with said idler gear, said drive gear carrying an indicator pointer;
• (j) gear means connected between said first and said second plates for providing mutual rotation of said first and second plates;
• (k) a housing to provide stability for said hubs and related components, said housing including an indicator scale arranged to cooperate with said pointer to indicate valve position;
• and
• (l) a tension spring fixed at one end to said housing and at the other end to a predetermined point on said first hub plate.

A visual indicator for a valve actuator, that controls a valve stem, that is attached directly to the outer ends of two rotors connected to the geared limit switch of said actuator, comprising:

• housing means attached to valve actuator;
• a first means inside said housing means connected to a first rotor and rotatable therewith to drive a first lug;
• a second means inside said housing means connected to a second rotor and rotatable therewith to drive a second lug;
• a first gear means concentric with said first means and movably responsive to drive force exerted by said first lug;
• a second gear means concentric with said second means and movably responsive to drive force exerted by said second lug;
• linking means for rotatably connecting said first and second gear means;
• and
• indicator means connected to said first gear means and controllably rotatable between predetermined positions to show relative location of the valve stem.