Assembly for the keyboards of electric typewriters or similar machines
AssigneeInternational Standard Electric Corporation
InventorsReinhard Deeg, Oswald Hack
Life of this patent
Estimating the term…
Abstract
A key assembly for the keyboards of electric typewriters or similar machines in which a one-piece baseplate forms the cover for the assembly. Crossing webs on the bottom side of the baseplate serve as spacers for the keyboard elements and also as the basis for mounting a contact mat provided with contact beads as well as the associated printed circuit board. The keyboard elements are mounted in the baseplate from above.
Claims8
A key assembly in a keyboard for electric typewriters or similar machines comprising a plurality of vertically guided keyboard elements each consisting of a key head and a key plunger, when actuated each keyboard element acting via its plunger upon a contact arranged between the plunger and a printed circuit board wherein the improvement comprises:
- a baseplate;
- said keyboard elements being inserted and removably mounted in said baseplate from above;
- detent means releasably retaining said keyboard elements in said baseplate;
- said baseplate having formed on its bottom side with a plurality of elongated supports;
- said printed circuit board being firmly connected to the bottoms of said supports;
- and
- spring means arranged between said key head and said printed circuit board to bias said key head away from said baseplate and wherein the force of said spring means is less than the retaining force of said detent means.
Dependencies are inferred from the claim text.