Edgerton Lab Notebook 22, Page 43: April 18, 1954

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Page start date:

April 18, 1954

Content type:

diagram,notes

Transcription:

April 18 1954 Belmont Mass 205 School St Bottom indicator. [underlined] A pinger circuit will be put in a cylinder for timing a transducer at about 1 or 2 pings per second. This will be listened for from the surface with a tuned amplifier and a loud speaker. When the bottom is hit, the angle of the device will change and a mercury switch will turn the pinger off. [electrical schematic and labelled diagram] [explanatory captions include: Magnetostrictive [?] transducer Assembly will tip on bottom and turn off the circuit. Chamber for mud. Spring doors to allow mud to enter and then close with a spring. Glass case for bottom indicator. [bottom right:] [--?--] and understood by me June 11, 1954 Robert Rines

Keywords:

pinger; transducer

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