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EP0097816A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Automatically adjusted delay function for timed repeat character capability of a keyboard

Assignee: JP Morgan Delaware
•
Filing: 1983-05-25
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Granted: —
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Expires: 2003-05-25
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Abstract

Abstract A typewriter (10) is described which has an electronic keyboard (12) utilizing a timed delay to determine whether a depressed key is indicative of the desire to print or display repetitive letters represented by that key. The typewriter (10) is provided with a technique for automatically adjusting the length of the delay such that a slow typist with sluggish finger movement will automatically cause the extension of the delay time and thereby prevent unwanted repetitive characters while a fast, very rhythmic typist will not cause the automatic extension of the delay time. The automatic extension is accomplished by timing the period of time that keys are held depressed and when that time approaches but does not exceed the preset automatic delay time, the delay time is then extended a predetermined amount.

Inventors

  • 👤 Carl Foster Johnson
  • 👤 James Monroe Williams

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 19:38
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/08; B41J5/28

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 119 words
A method of controllably changing the time period a key of a keyboard must, be maintained depressed to initiate repetitive character display/printing or function operation, characterized in that it comprises : providing a first preset time period, the exceeding of which by the depression of selected keys is indicative of a repetitive display/printing or function operation; measuring the period of time that a selected control key is depressed; comparing said period of time with a predetermined standard time period; increasing said first preset time period when said period of time exceeds said standard time period, whereby an operator who is slow and holds keys depressed for a longer period of time than normal will not undesirably display multiple characters.
Claim 2
Independent Claim 119 words
A method of controllably changing the time period a key of a keyboard must, be maintained depressed to initiate repetitive character display/printing or function operation, characterized in that it comprises : providing a first preset time period, the exceeding of which by the depression of selected keys is indicative of a repetitive display/printing or function operation; measuring the period of time that a selected control key is depressed; comparing said period of time with a predetermined standard time period; increasing said first preset time period when said period of time exceeds said standard time period, whereby an operator who is slow and holds keys depressed for a longer period of time than normal will not undesirably display multiple characters.
Claim 3
Dependent Claim 26 words
The method of Claim 1 wherein increasing said first preset time period comprises selecting one of a plurality of preset sensing time periods of different durations.
Claim 4
Dependent Claim 34 words
The method of Claim 2 wherein said increasing comprises: selecting the next larger of said preset time periods and substituting said next larger of said preset time periods for said first preset time period.
Claim 5
Independent Claim 50 words
The method of any one of Claims 1 to 3 wherein said measuring is made by means of a timer counter of fixed capacity and which overflows when counted to capacity, and said comparing is made by means of an electronic timer overflow counter for accounting for timer overflow events.
Claim 6
Dependent Claim 19 words
The method of Claim 4 wherein said increasing comprises selecting predetermined values for use in said timer overflow counter.
Claim 7
Dependent Claim 22 words
The method of any one of Claim 1 to 5 wherein said selected keys comprise a space key and a period key.

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