On Mon, 18 Feb 2008 19:31:52 -0600, Jon Elson wrote:
Richard J Kinch wrote:
RoyJ writes:
Motors for the line shafts
http://memory.loc.gov/pnp/habshaer/n...s/112615pv.jpg
The mechanical analog to a mainframe computer and time-sharing.

So, are those DC motors, or AC. At the time the Edison/GE works closed
up and moved to upper NY state, I suspect AC was fairly well entrenched.
Anybody got better close-ups of those motors?

http://memory.loc.gov/pnp/habshaer/n...ata/nj1222.txt
says, regarding some picture in the set, "Center background shows two
forty-horsepower direct-current electric motors installed in 1904 to
provide power to two drive shafts for first floor machine shops."
and also "...platform holding two 40-horsepower electric direct-current
motors".