Humidistat with improved mounting

Special receptacle or package – For an instrument

Patent

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Details

174 52R, 220 4R, 220 33, 220 38, 337380, B65D 8538

Patent

active

047068086

ABSTRACT:
A humidistat (17) generally includes a humidity sensing cartridge (20) adapted to be enclosed within a housing (18) having a base (21) and a front cover (22). The cartridge includes a plurality of engageable portions (24, 28). The housing base includes a peripheral frame (34) which surrounds and generally defines an enlarged rear opening (36) dimensioned to receive a humidity sensing cartridge therethrough. A plurality of flexible legs (38-40) extend forwardly from the base frame and have cams (41) and latches (42) adjacent their forward ends. A plurality of rigid posts (44, 45, 55) also extend forwardly from the base frame and include cams (52) terminating in openings (54) in the post walls. In assembly the cartridge to the base, the cartridge (20) is passed through the frame opening (36) from behind and rides onto the flexible leg cams (41) and snaps into place. Stops (50, 51) on at least some of the flexible legs and rigid posts limit the forward cartridge movement. Furthermore, at least some of the posts include locating corners (48) for properly positioning the cartridge. The leg latches (42, 43) may be constructed to accommodate cartridges of slightly different dimensions. The housing cover (22) includes a plurality of rearwardly extending flexible latch legs (59-61) and a plurality of cams (63, 64) on its peripheral wall. When the cover is assembled to the housing base, the cams (63, 64) locate the base (21) and the latch legs ride onto the cams (52) of the base posts (44, 45, 55) and snap into place.

REFERENCES:
patent: 461195 (1891-10-01), Dillon
patent: 2457347 (1948-12-01), Casler et al.
patent: 3112148 (1963-11-01), Wochner
patent: 3176062 (1965-03-01), Nordstrom et al.
patent: 3523217 (1970-08-01), Stiles
patent: 3542233 (1970-11-01), Golden
patent: 3670284 (1972-06-01), Fortier
patent: 3752900 (1973-08-01), Harrison et al.
patent: 4296454 (1981-10-01), Wong
patent: 4451693 (1984-05-01), Vest

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