| 摘要 |
A sight glass placed between two spaced apart confronting fittings and connected to a vessel to show the level of liquid in the vessel is shielded by a novel transparent plastic enclosure. The enclosure is in the form of a polygon and is made from a sheet of impact resistant plastic. The enclosure includes an elongated main body member having a U-shaped front member that is removably attached to a rear closure member. Upper and lower end members are removably secured to each opposed end of the main body member. Each of the end members have an outwardly opening slot formed therein for slidably receiving and capturing the spaced apart fittings therewithin. The transparent plastic material preferably is polycarbomate which exhibits high impact resistance and thereby offers great protection to the sight glass.
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