In-line sight indicator
First Claim
Patent Images
1. An in-line sight indicator for a fluid system comprising an indicator housing having a chamber with spaced flow inlet and outlet passages communicating therewith, each of said passages being connected to a fluid conduit;
- visually transparent sight means disposed in the wall of said housing;
an indicator element support member disposed and positioned in said housing chamber in fixed position to support an indicator element in said housing chamber in spaced relation from said visually transparent sight means so as to be substantially in-line with and intermediate the flow of a fluid stream flowing from said inlet to said spaced outlet passage; and
,an indicator element mounted on said support member, said element being chemically responsive to a fluid in said fluid system to provide a visible color change in the event of a preselected range of change in the fluid in said system.
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Accused Products
Abstract
An in-line sight indicator structure for a fluid system wherein a chamber defining flow-through sight housing includes a sight glass in one wall portion thereof and a support member extending from an opposite wall portion in spaced relation to the sight glass to support an indicator element mounted thereon within a fluid stream passed through the chamber, the housing being hermetically sealed from ambient.
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Citations
11 Claims
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1. An in-line sight indicator for a fluid system comprising an indicator housing having a chamber with spaced flow inlet and outlet passages communicating therewith, each of said passages being connected to a fluid conduit;
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visually transparent sight means disposed in the wall of said housing; an indicator element support member disposed and positioned in said housing chamber in fixed position to support an indicator element in said housing chamber in spaced relation from said visually transparent sight means so as to be substantially in-line with and intermediate the flow of a fluid stream flowing from said inlet to said spaced outlet passage; and
,an indicator element mounted on said support member, said element being chemically responsive to a fluid in said fluid system to provide a visible color change in the event of a preselected range of change in the fluid in said system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A hermetically sealed in-line sight indicator for a refrigeration system comprising:
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a unitary brass housing including a chamber having opposed, aligned refrigerant flow inlet and outlet apertures in said housing communicating with said chamber, each of said apertures being sized and conformed to nestingly receive and have hermetically brazed thereto a copper refrigerant conduit end; said unitary chamber defining housing further including a longitudinally extending cylindrical support arm drawn from the inner peripheral wall of said housing to extend substantially normally between said peripheral wall and the inner plane face of said sight glass, said support arm having a wafer element mounting recess at the distal end thereof positioned in fixed spaced relation to said sight glass intermediate the flow of a fluid stream and substantially adjacent the flow axis of said opposed, aligned refrigerant flow inlet and outlet apertures; a wafer indicator element of preselected thickness, sized to nest in said mounting recess, said wafer element being a Whatman #3 paper having been dip treated in a solution comprised of approximately 200 cc of distilled water and approximately 2 cc of 6N HCl to which has been added approximately 40 grams of CoCl2. 6H2 O and approximately 21 grams of ZnCl2, drip hung and oven dried at approximately 45°
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C.; and
,said unitary brass housing having an aperture with a peripheral seat disposed in the wall thereof to nestingly receive a visually transparent sight glass assembly in hermetically sealed relation therein, said sight glass assembly including a tin-plated steel band surrounding a sheet of preselected thickness inserted into said band on a suitable jig to form said sight glass assembly, said sight glass assembly being sized to nest on said aperture to rest on said aperture seat with the outer peripheral face of said band being sized to abut said aperture wall to be hermetically sealed thereto with a crimped peripheral edge of said aperture wall engaging said band edge and soldered thereto in hermetically sealed relationship therewith.
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Specification