Measuring and testing – Miscellaneous
Patent
1983-03-02
1984-08-28
Swisher, S. Clement
Measuring and testing
Miscellaneous
7386431, 901 14, G01D 2100
Patent
active
044676484
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an elevator particularly suitable for lifting up and down a water examination instrument to be immersed in a clean-water or sewage treating pool for the inspection of water quality.
BACKGROUND OF THE ART
An example of the conventional apparatus of this sort is shown in FIG. 1, in which indicated at (1) is a treating pool, at (2) water to be examined, at (3) a water examining instrument, and at (4) a base of an elevator mechanism for lifting up and down the water examining instrument (3) and having an upright support column (5) securely erected thereon. An elevator frame (7) which is linked to an elevating handle (6) through a lift mechanism, not shown, is movable up and down along the support column (5) by rotation of the elevating handle (6). Denoted at (8) is an arm which is securely fixed to the lift frame (7) at one end thereof and provided with a bracket (9) at the other end for supporting the water examining instrument (3) therein. The reference numeral (10) indicates a guard rail which is provided for the sake of safety in most cases.
With the conventional elevator mechanism of the above described construction, the elevator frame (7) is lifted up and down by turning the elevating handle (6), moving up and down therewith the water examining instrument (3) by the lift arm (8) and bracket (9) which are securely fixed to the elevator frame (7).
When the level of water to be examined is low, however, it becomes necessary to employ a long water examining instrument which needs to be lifted up and down over a greater distance by the use of a large elevator mechanism with a greater lift, resulting in a costly, instably tall elevator construction. Besides, the maintenance and service of the detector or other parts of the water examining instrument involves considerable labor and dangerous operations, requiring the operator to lean out over the pool or to move the elevator as a whole.
DISCLOSURE OF THE INVENTION
This invention provides an elevator for a water examining instrument, wherein the instrument is supported rotatably about a first axis extending in the longitudinal direction of an arm which supports the instrument and also about a second axis extending in the lifting direction of the elevator, thereby permitting a significant reduction in the lift distance of the elevator and facilitating maintenance and service of the examining instrument in a safe position, in addition to reductions in size, weight and cost of the elevator itself and its stable installation.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings:
FIG. 1 is a schematic side elevation of a conventional elevator for a water examining instrument; and
FIG. 2 is a perspective view of an elevator for water examining instrument, embodying the present invention;
FIG. 3 is an enlarged view of a portion of the elevator of FIG. 2, in the area of the arm 16; and
FIG. 4 is a sectional view taken on line IV--IV of FIG. 3.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to FIGS. 2 to 4, there is illustrated an elevator according to the invention, which is same as the above-described conventional elevator in fundamental arrangement. In these figures, the component parts which are common to FIG. 1 are designated by like reference numerals. In this particular embodiment shown, a gear box (11) is provided on the elevator frame (7), rotatably supporting therein a worm (14) of a worm gear (13) which is integrally connected to a rotating handle (12) and a worm wheel (15) which is meshed with the worm (14). Securely fixed to the worm wheel (15) is an arm (16) which corresponds to the arm (8) of FIG. 1, which arm (16) has mounted thereon a water examining instrument (3) through a bracket (9). The support column (5) is rotatably supported on the base (4) through a bearing (17) and has a handle (18) attached thereto for rotating same. Although not shown, the support column may be provided with a stopper for fixing it at a position or positions of desired rotational angles.
With the above-descr
REFERENCES:
patent: 3313159 (1967-04-01), Vanderbeck
patent: 3922921 (1975-12-01), Woo
patent: 4037476 (1977-07-01), McCrabb
patent: 4204431 (1980-05-01), Schulz
patent: 4407625 (1983-10-01), Shum
Mitsubishi Denki & Kabushiki Kaisha
Swisher S. Clement
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