EDWARD B MITCHELL
Engineering in Belmont, MA

5323297, Jun 21, 1994

Oct 23, 1992

7/965894

Nicholas R. Palumbo - Cumberland RI
Edward B. Mitchell - Belmont MA

H05K 702

361809

Twist-in mounting structure comprises a barrel, and panel capture tabs extending oppositely away therefrom, each terminating in a free end spaced away from the barrel. Each tab has an interference surface sloping downwardly and inwardly toward the barrel, and an interference region bounded by the interference surface. An acute angle is included between the interference surfaces and a cooperative raised capture plateau lying below them. A spring locking arm, sprung out of the plane of the housing mounting surface, provides a distal locking element. The housing mounting surface provides structure for laterally capturing the locking arm. The locking arm responds to a varying force to move between an unstressed position, a depressed position in which the locking element is depressed within the housing mounting surface structure, and a locking position in which the locking element extends through a panel aperture to fix the component rotationally with respect to a panel captured between the panel capture tabs and the panel capture plateau.

4362910, Dec 7, 1982

Dec 31, 1980

6/221719

Theodore D. Boebel - Bedford MA
William B. Walkup - Southboro MA
Edward B. Mitchell - Belmont MA

Ark-Les Corporation - Watertown MA

H01H 518, H01H 916, H01H 926

200 5EA

An electrical switch with low profile and small button motion has a button close to a pivot and includes a ring like structure with bearing areas to open and close contacts. The actuating button is situated in an aperture and covered with a flexible membrane which seals the switch, prevents entry of dirt and gives an indication of the switch.