Calculator pushbutton format attachment for pushbutton telephones
OwnerHugh J. Metzinventor
Life of this patent
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Abstract
A telephone attachment is provided for fitting over the keyboard of a pushbutton telephone for converting from the telephone pushbutton format to a calculator pushbutton format. The attachment design includes a plurality of u-shaped levers in contact with several attachment-mounted pushbuttons arranged in a calculator format. The individual levers are so disposed within the attachment that they depress correspondingly-numbered telephone pushbuttons when the calculator format pushbuttons are depressed. Through the use of the attachment, a telephone user operates a pushbutton telephone using the calculator pushbutton format.
Claims4
An attachment for mounting over the keyboard of a pushbutton telephone for converting from the telephone pushbutton format to a standard calculator pushbutton format comprising:
- a. a housing constructed for mounting on a pushbutton type telephone over the identified telephone pushbuttons arranged and identified in telephone format;
- b. at least twelve pushbuttons arranged and identified in a calculator format mounted in said housing, with a first end projecting above said housing for operation by a telephone user, and a further end within said housing;
- and
- c. u-shaped levers corresponding only to the number of identified pushbuttons in said housing that are not in format registry with corresponding identified pushbuttons of said telephone, said levers being rotatable within said housing and each lever having a first arm with a distal end in contact with a correspondingly identified one of said telephone pushbuttons and a further arm with a distal end in registry with a correspondingly identified one of said at least twelve pushbuttons, said distal end of said further arm being more elevated from said telephone pushbuttons than said distal end of said first arm.
Dependencies are inferred from the claim text.