Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1979-12-24
1981-08-04
Gill, James J.
Measuring and testing
Sampler, sample handling, etc.
Capture device
G01N 124
Patent
active
042815452
ABSTRACT:
PCT No. PCT/SE79/00099 Sec. 371 Date Dec. 24, 1979 Sec. 102(e) Date Dec. 21, 1979 PCT Filed Apr. 24, 1979 PCT Pub. No. WO79/00981 PCT Pub. Date Nov. 29, 1979
An aspirator for air sampling, the air samples being sucked into a glass vessel for a certain period of time. The aspirator can be carried in a pocket, for example, by the one whose working environment is being analyzed. In a casing there is disposed a replaceable cylinder (2) with associated plunger (4). The plunger is intended to be pulled in by a motor unit (12) and gearbox, arranged adjacent the cylinder (2), the unit (12) rotating a drum (8) onto which is wound a string. The other string end is fixed, via a pulley (7), to the spring-loaded plunger (4). When air has been sucked in to a sufficient amount, the opening (3) of the cylinder is closed and the plunger can be released from the string and the spring, which is possible since the plunger is only magnetically retained (4).
REFERENCES:
patent: 3884081 (1975-05-01), Griffith
patent: 3933029 (1976-01-01), Rabenecker et al.
patent: 4080832 (1978-03-01), Moody et al.
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