HAMMOND SYNCHRONOUS ELECTRIC ALARM MANTLE CLOCK.
MANUFACTOR: HAMMOND INSTRUMENT, CHICAGO, ILLINOIS USA
YEAR: 1932
FEATURES: LARGE DIAL, LARGE ARABIC NUMERALS, SWEEP SECONDS HAND
CLEAR CONTRAST DIAL, ARTISTIC BLACK HANDS, GLASS LENS
ALARM: EASY TO SET USING A WHEEL IN THE BACK (PICTURED)
ALARM ON/OFF SWITCH. WORKS WITHOUT ISSUES.
CONDITION: GREAT CONDITION FOR AN 87 YEARS OLD CLOCK. NO SCRATHCHES OR DENTS ON
THE LENS OR THE CHROME BEZEL. ALL BUTTONS AND WHEELS ON THE BACK WORK
SMOOTHLY, KEEPS PERFECT TIME (TESTED)
** REQUIRE RESTART AFTER PLUGGING IN, INSTRUCTIONS ON THE BACK.
(Back of the Hammond Clock Equiped with the Characteristic Starting Knob,
- Set the Clock First to the Right Time.
- Turn the Knob Gently to the Direction of the Arrow Once or Twice Pause To See if the Seconds
Hand Started Moving.
DIMENSIONS: 5 1/4" WIDE AND 4 1/2" HIGH.
* HISTORY AND INFORMATION:
The Hammond Clock Company of Chicago, Illinois, Produced Electric Clocks Between 1928 and 1941. It was one of the Ventures of Laurens Hammond, the inventor of The Famous Hammond Organ.
* Invention of the Hammond Clock Motor
As Stuyvesant Barry reports in his biography of Laurens Hammond, Hammond himself acknowledged that his invention of the clock that was to bear his name was inspired by the success of Henry Warren's Telechron clocks. Upon discovering the Telechron technology,
Hammond designed a motor that was synchronous, like Warren's, that is to say, it rotated at a speed that was tied to the frequency of the current supplied by the power grid. In this way, any clock operated by such a motor would Run with Great Precision as Long as the Operators of the Power Grid kept the Current's Frequency Constant.
This had become possible since the introduction of the Warren master clock, an innovation of which Hammond took full advantage with his own invention. Hammond's motor, however, differed from Warren's in a number of respects: above all, it ran more slowly and was not self-starting. (Warren had patented his self-starting technology.) The latter Hammond did not consider to be a disadvantage; he believed that people would be misled by their clocks if they restarted automatically after a power outage. As Hammond's new clock motor was not self-starting, his clocks possessed a characteristic little knob on the back that one had to spin to start the motor.
* ACTUAL PHOTOS
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