Measuring and testing – Instrument casing
Patent
1994-10-21
1995-10-31
Raevis, R.
Measuring and testing
Instrument casing
G01L 708
Patent
active
054619157
ABSTRACT:
A mounting housing made of plastic is intended for pointer-type measuring units, especially for mechanical thermometers, barometers, hygrometers or the like, all of which have a central pointer shaft with a pointer movable over a ring dial. It includes an essentially cylindrical housing box (1) with a housing bottom (15) made in one piece with the rear side of a box wall (13) and with a front-side flange ring (2). The housing box is provided on the inside with elastically deflectable snap-in elements (24) for automatically holding an inserted measuring unit (20), and has ratchet-tooth-like fastening elements (23) on the outside to fasten it in a recess of a measuring instrument holder. To make it possible to insert and remove a measuring unit (20) in an easily deformable state of the box wall (13), but to also ensure a considerably higher dimensional stability of the housing box in the completely mounted state, the housing box (1) and the ring flange (2) are formed as separate individual parts, which are fitted together into a dimensionally stable assembly unit by detachable positive-locking connections (3). The ring flange (2) has, on the rear side, a double-walled centering ring (4), which is provided with an annular groove (8) that fittingly accommodates the open wall edge (14) of the inherently elastically deformable box wall (13) of the housing box (1).
REFERENCES:
patent: 3527102 (1970-09-01), Harland
patent: 3830454 (1974-08-01), Debaigt
patent: 5341684 (1994-08-01), Adams et al.
Orka Optik GmbH
Raevis R.
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