Apparatus and method for measuring the time taken for a change i

Details Apparatus and method for measuring the time taken for a change i Apparatus and method for measuring the time taken for a change i

1976-07-12

1978-03-28

Serwin, R.E.

Chemistry: physical processes

Physical processes

Crystallization

23230B, 23259, 23253R, 73 54, 73 57, 73 641, G01N 3316, G01N 1110

Patent

active

040812421

ABSTRACT:
An apparatus for measuring the time taken for a change to occur in the physical state of a material or medium, such as the time of appearance of a clot in a blood sample, includes a jar whose bottom may serve as a circular track for a ball, a ball able to roll around the track, a support for the jar maintaining the bottom of the jar and track in a plane inclined in relation to the horizontal plane, a means for rotating the support and jar whereby the ball remains at the lowest point of the track when the material is in the liquid state but is carried around the track by the more viscous material when that has changed its state, and a means of detecting the movement of the ball.

REFERENCES:
patent: 3375705 (1968-04-01), Kim
patent: 3707871 (1973-01-01), Emmet
patent: 3888113 (1975-06-01), Miranda
patent: 3967934 (1976-07-01), Seitz et al.

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