Push operated momentary switch

A push operated momentary switch comprising

• a base member having a substantially planar surface,
• a first stationary contact on said surface and having a U-shaped contact surface extending upwardly from the surface,
• a second stationary contact on said surface and having at least one conductive surface extending substantially parallel to the surface,
• a first post extending upwardly from said surface at a region adjacent said two stationary contacts,
• a helical spring contact disposed over said post with its helical axis substantially perpendicular to said surface,
• said spring contact having first and second spring ends that extend tangentially in opposite directions from opposite ends of the helical body of the spring,
• the first spring end being received in the U-shaped contact surface of said first stationary contact and the second spring end being adapted to engage said conductive surface on the second stationary contact,
• a guide post extending upwardly from said surface and substantially parallel to the first post,
• a plunger adapted to fit over said first post and to engage the top end of the spring contact thereon, said plunger being adapted to move downwardly on said first post to compress said spring contact,
• a keyway on said plunger for slidingly engaging said guide post on the base for establishing a desired circumferential registration of the plunger relative to the base and stationary contacts,
• means on said plunger for engaging said second spring end of the spring contact and for pushing said second spring end toward said base when the plunger is pushed toward the base,
• cover means cooperating with said base for enclosing said contacts and posts and for providing a bushing that permits the plunger to extend therethrough and to reciprocate with respect thereto, and
• means for restricting the reciprocating motion of the plunger between outermost and innermost positions on said first post.

A momentary push operated switch comprising a base member,

• first and second stationary contacts disposed in spaced relationship on said base member,
• a post extending upwardly from said base member,
• a helical spring member disposed about said post with its helical axis substantially normal to said base member,
• first and second spring ends extending tangentially from respective opposite end regions of the helical body of the spring,
• said second stationary contact having at least one conductive surface for selectively contacting the second spring end,
• a plunger in sliding engagement with said post and adapted to engage the second spring end when the plunger is depressed onto said post,
• said first spring end engaging said first stationary contact,
• a cover member cooperating with said base member to enclose said contacts and said post,
• an aperture in said cover for guiding said plunger in a reciprocal motion toward and away from said post,
• guide means in addition to said cover member extending upwardly from said base member,
• means on said plunger cooperating with said guide means for establishing a desired circumferential relationship between the plunger and base member.