| 摘要 |
A method of making a sight glass assembly generally including forming a housing having an opening therethrough provided with an annular wall, forming a lens having an annular peripheral wall provided with a diameter greater than the diameter of the housing wall at predetermined equilibrium conditions, effecting a change in the predetermined equilibrium conditions of the lens and housing sufficient to cause a dimensional change between the diameters of the housing and lens walls sufficient to permit the insertion of the lens into the opening of the housing, inserting the lens into the housing opening while maintaining the change in conditions so that the lens wall is positioned in opposed relation to the housing wall, and maintaining the lens in the opening with the lens and housing walls disposed in opposed relation while permitting a return to the equilibrium conditions of the lens and housing whereby the housing and lens wall will engage to place the lens in radial compression and form a fluid tight seal therebetween.
|
