Push button contact mechanism for use with printed circuit boards

Abstract From the Canadian patent

The invention relates to a contact mechanism suitable for application to printed circuits arranged on a board and may be employed in a telephone set comprising push button means. The mechanism consists of a first contact member in the form of a leaf spring having two legs and between these a tongue part the middle portion of which has an inwardly curved bent part and the lower portion of which has two narrow taps carrying the contact elements. The first contact member is placed in upright position along a groove in a bottom plate. A second contact member consists of a small T-shaped metal plate which is fastened oppositely to said taps in a notch of the groove and carries a contact element. …