Stephen M. Balzer is sometimes written as Belzer. For example, Balzer-Manly or Belzer-Manly.

From appendix 6: Balzer was a motor-racing pioneer, who along with Manly made the engines for Langley's Aerodrome.

“The Balzer-Manly, front and rear view”

-Before he had built smaller engines (See Manly).

-It is a five-cylinder rotary engine, rotating on two transverse supports, which can be seen clearly in the above photographs.

-Perhaps the most "modern" part was that of the combustion chambers attached to the cylinder.

-It had three valves, automatic exhaust and inlet valves, and another controlled and bigger valve that communicated the sub-chamber with the main-chamber. Its operation -at least for the drawing- is not rather clear.

“Balzer-Manly prechamber” (AEHS)