20 minutes. Average power consumption is 6 watts. 
The price will range from $.50 to $150. The 
price of the above air device is $30. 
CONCLUSION 
To solve our switching problems, we used the 
grandfather clock technique. We selected a 
solenoid-wound chronometric movement for our base 
timing source because it offered acceptable ac- 
curacy of $10 seconds per day at a reasonable 
cost. Also involved in our consideration were 
low power consumption, independence from voltage 
fluctuations, long life, small size, simplicity, 
dependability and flexibility in selection of 
cycles ranging from 1 minute to 12 hours by 
changing cams, We adjust these sequence timers 
on a crystal oscillator time standard recorder 
and ship the recording slip with the unit. The 
timers have been produced for over a year and 
have proven their ability to retain reliability 
and accuracy after the rough handling and 
droppage involved in placing an instrument pack- 
age in the ocean. 
Grandfather's old clock is still good. 
79 
