Method and apparatus for storing biological matter

Details Method and apparatus for storing biological matter Method and apparatus for storing biological matter

1975-07-28

1977-07-05

Swann, III, Glen R.

Communications: electrical

Systems

Call station

177 7, 177 46, 340280, 340371, 340421, G08B 2100

Patent

active

040343618

ABSTRACT:
The supply of cryogenic fluid used for controlled storage environment of biological materials is monitored so as to insure an adequate level. The monitoring is effected by employing a beam balance mechanism. Counterweights associated with the beam balance are adjusted for providing a balance arm transition around a horizontal axis when the total weight of the container including the biological materials and the cryogenic refrigerant has dropped below a predetermined threshold. A sensing switch associated with the arm of the beam balance actuates an alarm circuit when the weight threshold has been passed.

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patent: 1552939 (1925-09-01), Mackey
patent: 1766788 (1930-06-01), MacMahon
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patent: 3131780 (1964-05-01), Yarborough
patent: 3200389 (1965-08-01), Damico et al.
patent: 3412395 (1968-11-01), Kiene, Jr.
patent: 3656138 (1972-04-01), Hamma
patent: 3740740 (1973-06-01), Milo
patent: 3755801 (1973-08-01), Milo

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