Title: Recording instrument adapted for use in remote unattended locations

Abstract: A recording instrument for use in ocean depths and like remote locations and adapted to provide meaningful readings of temperatures and pressure, for example, at such locations over a long period of time without attendance. Analog signals from transducers, which indicate the level of the thing-to-be-measured, are processed to give an averaged digital signal that is then stored on a magnetic tape. The system is battery powered. The instrument detailed is for use at ocean depths where the instrument housing and attachment to a mooring line are of particular importance.

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Inventors: Dahlen, John M. (Duxbury, MA, US)
Toth, William E. (Bolton, MA, US)
Shillingford, Jr., John T. (Watertown, MA, US)
McKenna, Jr., John F. (Gloucester, MA, US)

Application Number: 444948
Filing Date: 1974-02-22
Publication_date: 1976-01-27
Assignee: Massachusetts Institute of Technology (Cambridge, MA)
Primary Class(es): 360/6 73/170.29, 346/33M, 360/39, 360/51, 367/131
Other Classes:
US Patent Ref:

2756404	Jul, 1956	Anderson	340/5.
3366924	Jan, 1968	Brown	360/6.
3461429	Aug, 1969	Gray	360/6.
3678468	Jul, 1972	Jefferson	340/172.
3838445	Sep, 1974	Cupp	360/18.

Other Refs:
Primary Examiner: Cardillo, Jr., Raymond F.
Assistant Examiner: Lucas, Jay P.
Attorney: Smith, Jr.; Arthur A., Shaw; Robert, Santa; Martin M.