Geometrical instruments – Distance measuring – Opposed contacts
Patent
1990-10-15
1991-08-27
Haroian, Harry N.
Geometrical instruments
Distance measuring
Opposed contacts
33299, G01B 308
Patent
active
050421689
ABSTRACT:
A measuring instrument for use in the measuring of horticultural growth defined as a base tube, including series of tubes of progressively decreasing diameters, each telescopingly receivable within an underlying tube defining five to seven sections, each of a predetermined gradation. The tube structure is mounted within a socket of a support plate, with the support plate secured for support of the extensible tubes.
REFERENCES:
patent: 325134 (1985-08-01), Wainwright
patent: 2554887 (1951-05-01), Tricarico
patent: 2601088 (1952-06-01), Burgess
patent: 3516171 (1970-06-01), Martin
patent: 3843079 (1974-10-01), Reisling
patent: 4326352 (1982-04-01), Barth
Gilden Leon
Haroian Harry N.
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