Abstract: A tube connection fitting comprises a body member formed with an annular recess for receiving the end of a tube to be connected, and a cap threaded onto the body member and including a plurality of fingers engaging the end of the tube received within the annular recess. The outer end of the annular recess is shaped in such a manner that it accomodates different sizes of tubes, and securely locks and seals the tube within the recess.

Abstract: A manual slide valve comprises a housing having a valve slide slidable within the housing. The housing is constituted of two sections each including projections and recesses cooperable with each other and with the slide valve such that when the slide valve is disposed within the housing, the housing sections are interlocked with it and with each other against separation, and when the slide valve is removed from the housing, the housing sections are free and may be separated from each other. The control device may also be embodied in an electrical switch wherein the slide member is the movable electrical contact.

Abstract: In a pipe coupling including a housing having a bore for receiving the end of a pipe, and clamping means for clamping the pipe to the housing, the clamping means is formed on its inner face with a first circumferentially-extending recess for receiving a first clamping ring, and with a second circumferentially-extending recess axially spaced from said first recess for receiving a second clamping ring of a different hardness than the first clamping ring, to thereby enable the coupling to be used for coupling pipes of different hardnesses by selecting the appropriate clamping ring and inserting it into its respective recess.