Abstract: A flip cover functioning as a protective guard preventing accidental switch actuation and as a mechanical indicator of switch position. Cooperating slidable abutment elements on the push-button head of the switch and on the flip cover maintain the flip cover in outwardly tilted position with the switch latched in actuated position. With the switch pushed into latch-releasing position the abutment elements are relatively so positioned as to permit the switch to return to its released or unactuated position, the abutment elements slipping past each other to permit return of the flip cover into its normal guard position.

Abstract: A low-resistance electro-mechanical switch with snap-action tactile feel is disclosed comprising a base carrying one contact, a stepped guide post projecting from the base and carrying an opposing contact, and a conductive ring-like helical spring looped under tension around the guide post and serving as the bridging contactor. Instant complete switching is achieved with a snap action by advancing the spring against and abruptly past the step on the post, switching transients accompanying such snap action being avoided by the redundancy parallel paths that the several spring coils afford while settling in bridging position between the switch contacts.