초록 ▼

A hermetically encased instrument includes a tubular housing with a front window glass, and a rear opening and a peripheral groove in its rear inside face, an instrument unit movably located in the housing and having a front meter observable through and limited in forward movement proximate the wind

A hermetically encased instrument includes a tubular housing with a front window glass, and a rear opening and a peripheral groove in its rear inside face, an instrument unit movably located in the housing and having a front meter observable through and limited in forward movement proximate the window glass; and a locking and sealing assembly mounted on the rear of the instrument unit and springs urging the asesmbly rearwardly, the assembly including a circular closure plate with a rearwardly facing stepped periphery engaging a rubber O-ring and a sealing plate coaxial with the closure plate and retained thereon by screws, the forwardly pressing of the assembly and the tightening of the screws loading the springs and distorting the O-ring into sealing engagement with the groove and the surrounding faces of the closure and sealing plates and housing to releasably lock the instrument unit in the housing and hermetically sealing the housing rear opening.

대표청구항 ▼

A sealed encased instrument for vehicles comprising a tubular housing having a rear access opening, an instrument unit longitudinally slidably housed in the housing and resiliently limited in its forward movement to a predetermined position, a closure member having a releasable coupling for separabl

A sealed encased instrument for vehicles comprising a tubular housing having a rear access opening, an instrument unit longitudinally slidably housed in the housing and resiliently limited in its forward movement to a predetermined position, a closure member having a releasable coupling for separable electrical conductors and carried by the rear portion of the instrument unit in slidable registry with the access opening, said closure member having a perimeter complementing the inside face of the tubular housing, a locking member corresponding in perimeter to that of the closure member and longitudinally movable relative thereto, the closure and locking member having confronting borders, at least one of said closure member and said inside face of said housing having an annular portion removed therefrom, a deformable resilient gasket sandwiched between said confronting borders and means for mutually contracting the closure and locking members to compress the gasket and outwardly distort it into sealing engagement with the inside face of the housing.