Engine driven heating system components for Stirling engines

A two power-source drive system for use in a Stirling engine having a longitudinally extending centerline and an engine driven element coincident therewith providing one power source, comprising:

• (a) an electrically energized motor providing a second power source,
• (b) a first shaft offset but aligned with said centerline, said first shaft being drivingly connected to said driven element, said first shaft having first and second portions, the first portion being connected to said engine driven element and said second portion extending entirely through said second shaft whereby additional rotatable accessories are connected for engine drive foreward of said engine, said first portion has means thereon effective to extend rearwardly and transmit drive to additional rotatable accessories for engine drive rearward of said second portion,
• (c) a second shaft concentrically disposed about said first shaft,
• (d) means providing a viscous drive connection between said first and second shafts,
• (e) a plurality of combustion circuit components for said engine, each of said components being connected to said second shaft, and
• (f) means providing a one-way driven connection between said second shaft and motor whereby drive may be transmitted either from said motor or first shaft to said second shaft in the same rotative direction.