Patent US4497589A successfully refreshed from Google Patents.
US4497589A
Expired / Lapsed
US
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Electronic typewriter with means for positioning the typed member
Assignee: TIM SpA
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Filing: 1982-08-16
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Granted: 1985-02-05
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Expires: 2002-08-16
Abstract
Abstract The keyboard of an electronic typewriter with a daisywheel print unit on a carriage includes a CENTER key and REPEAT key. With the print unit positioned where an insertion is to be made in a line being set up blind, these keys are actuated and the character to be inserted are typed in. The usable area for typing is continually shown on a two-digit display device. When a service key is then depressed, the line is printed with the inserted character entered by appropriate compression or expansion of empty spaces adjacent the characters to be inserted. The typewriter further comprises a line space memory and a control circuit which signals the number of line spacing commands which can still be carried into effect before the last line to be typed on the sheet.
Inventors
- 👤 Mario Figini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:29
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/30; B41J5/44; B41J29/00; B41J29/42; B41J29/44
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
An electronic typewriter comprising line spacing means actuatable for line spacing a recording sheet; selection key means for selecting a line space pitch as a set multiple of an elementary line step; a line space command operable to actuate said line spacing means according to said set multiple of an elementary line step; a line space memory capable of storing a number of elementary line steps which can be typed on the recording sheet; a control circuit responsive to each operation of said line space command, to said line space memory and to a selected line space pitch for calculating a number of permitted operations of said line spacing command which can still actuate said line spacing means before the last line to be typed on the recording sheet; comparing means for comparing said number of permitted operations with a given reference number of lines; and a display device controlled by said control circuit and by said comparing means to display said number of permitted operations when said number is not more than said reference of lines.
Claim 2
Dependent Claim
177 words
An electronic typewriter comprising line spacing means actuatable for line spacing a recording sheet; selection key means for selecting a line space pitch as a set multiple of an elementary line step; a line space command operable to actuate said line spacing means according to said set multiple of an elementary line step; a line space memory capable of storing a number of elementary line steps which can be typed on the recording sheet; a control circuit responsive to each operation of said line space command, to said line space memory and to a selected line space pitch for calculating a number of permitted operations of said line spacing command which can still actuate said line spacing means before the last line to be typed on the recording sheet; comparing means for comparing said number of permitted operations with a given reference number of lines; and a display device controlled by said control circuit and by said comparing means to display said number of permitted operations when said number is not more than said reference of lines.
Claim 3
Dependent Claim
55 words
An electronic typewriter according to claim 1 further comprising first memory for storing a remaining number of elementary line steps remaining before the last line to be typed and wherein said number of permitted operations is obtained by dividing said remaining number of elementary line steps by said set multiple of an elementary line step.
Claim 4
Dependent Claim
30 words
An electronic typewriter according to claim 2, wherein said number of permitted operations changes in response to each new set multiple of elementary step selected by said selection key means.
Claim 5
Dependent Claim
46 words
An electronic typewriter according to claim 1, further comprising first key means actuatable to define either a storage mode or a normal mode and second key means actuatable in said storage mode for causing said line space memory to store said number of elementary line steps.
Claim 6
Dependent Claim
55 words
An electronic typewriter according to claim 4, wherein said display device responds to said storage mode and to said second key means for displaying said number of elementary line steps and responds to said normal mode to display said number of permitted operations when said number is not more than said reference number of lines.
Claim 7
Dependent Claim
23 words
A typewriter according to claim 1, wherein the control circuit prevents actuation of the line space commands after typing the last inputted line.
Claim 8
Dependent Claim
22 words
An electronic typewriter according to claim 1, wherein said memory is a random access memory rendered not volatile by a back-up battery.
Claim 9
Dependent Claim
301 words
In an electronic typewriter comprising line spacing means actuatable for line spacing a recording sheet, selection key means for selecting a line space pitch as a set multiple of a line step and a line space command operable to actuate said line spacing means according to said set multiple of a line step, the combination comprising: first key means actuatable for defining either a storage mode or a normal mode; a line space memory; second key means actuatable in said storage mode for storing in said line space memory a number of line steps which can be typed on the recording sheet; a display device responsive to said storage mode and to said second key means for displaying said number of line steps; first memory means for loading therein said number of line steps; control means responsive to each actuation of said line space command and to said set multiple of a line step to subtract the set multiple of a line step from said number of line steps in said first memory means to find a remaining number of line steps remaining before the last line to be typed and to load said first memory means with the found remaining number; means for calculating a number of permitted operations as a result of a division of the content of said first memory means by said set multiple of a line step; second memory means for storing said number of permitted operations; and comparing means for comparing said number of permitted operations with a given reference number of lines; and wherein said display device responds to said normal mode, to the content of said second memory means and to said comparing means to display said number of permitted operations when said number is not more than said reference number of lines.
Claim 10
Dependent Claim
301 words
In an electronic typewriter comprising line spacing means actuatable for line spacing a recording sheet, selection key means for selecting a line space pitch as a set multiple of a line step and a line space command operable to actuate said line spacing means according to said set multiple of a line step, the combination comprising: first key means actuatable for defining either a storage mode or a normal mode; a line space memory; second key means actuatable in said storage mode for storing in said line space memory a number of line steps which can be typed on the recording sheet; a display device responsive to said storage mode and to said second key means for displaying said number of line steps; first memory means for loading therein said number of line steps; control means responsive to each actuation of said line space command and to said set multiple of a line step to subtract the set multiple of a line step from said number of line steps in said first memory means to find a remaining number of line steps remaining before the last line to be typed and to load said first memory means with the found remaining number; means for calculating a number of permitted operations as a result of a division of the content of said first memory means by said set multiple of a line step; second memory means for storing said number of permitted operations; and comparing means for comparing said number of permitted operations with a given reference number of lines; and wherein said display device responds to said normal mode, to the content of said second memory means and to said comparing means to display said number of permitted operations when said number is not more than said reference number of lines.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |