Timing circuit for a chassis lubricator

A timing device for periodically energizing a load from a source comprising:

• switching means responsive to a given input signal for effecting the energization of said load from said source;
• logic network means including:
• an electrochemical timing device exhibiting, from an initial conductive condition, a conductive state over a predetermined first interval upon the passage of a predetermined value of current there through in a designated first directional sense and exhibiting a substantially non-conductive state to said current of first directional sense at the termination of said interval, said device being responsive to the passage of current of predetermined value there through in a second directional sense to transition from said non-conductive state to said initial state within a predetermined second interval,
• a first transistor stage operatively associated with said switching means and said timing device and having a conducting mode deriving said switching means input signal when said timing device is in said non-conducting state, and having a non-conducting mode when said timing device is in said conductive state,
• a second transistor stage operatively associated with said timing device and responsive to a given input signal to exhibit a conducting mode effecting said current passage in said first directional sense to derive said timing device conductive state and having a non-conducting mode during said passage of current of second directional sense through said timing device;
• and
• R-c timing network means for deriving said given input signal to said second transistor stage at the termination of a predetermined second interval commencing with the termination of said first interval.