American TELEGRAPHIC TIME CO REGULATOR

jkfabulos

NAWCC Member
Aug 21, 2001
952
92
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THIS IS THE COMPANY FORMED BY CHESTER POND AROUND 1883 THAT EVENTUALLY BECAME SELF WINDING CLOCK CO.
UNUSUAL NATIONAL CLOCK CO MARKED MOVEMENT WITH EARLY THREE SCREW DIAL MOUNTING.
MOVEMENT HAS DIFFERENT STYLE CONTACT ARRANGEMENT COMPARED TO THE STANDARD SELF WINDING TYPE.
tt1.jpg tt2.jpg tt3.jpg tt4.jpg tt5.jpg tt6.jpg tt7.jpg
 

jkfabulos

NAWCC Member
Aug 21, 2001
952
92
28
This is the three pole motor that winds the mainspring every hour. Not the later Vibrator "F" type movement.
 

mxfrank

Registered User
Oct 27, 2011
163
9
18
It's not commutated like a modern PM motor, it's more of a sequential stepper. The three contact points are arranged so that they make/break in sequence as the rotor turns. Each contact set controls one of the coils, so the magnetic field sort of rotates. The rotor is a brass cage with iron inserts. I'm not sure if they're magnetized or not. The moving rotor winds the mainspring about once an hour.
 

Toughtool

Newbie
Aug 12, 2016
274
36
28
Panama City, FL
Country
That is very cool. I noticed the iron colored inserts in the rotor. Impressive looking clock.
 

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Rockford's early high grade movements by Greg Frauenhoff