US3788443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character selection and impression control mechanism for typewriter
Assignee: Paillard SA
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Filing: 1972-02-11
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Granted: 1974-01-29
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Expires: 1992-02-11
Abstract
Abstract A character selection and impression control mechanism is provided with an integrated coded mechanical system of transmission for the orders controlling the character selection, the shift, the printing velocity and the ''''No-print'''' functions, between the frame of a typewriter and converter or decoding means supported on the carriage and controlling the devices performing these functions on said carriage. This system of transmission comprises a definite number of bails mounted on said frame for relative movements thereon and each adapted to cooperate with control means supported by the carriage for all the positions of said carriage along a line of writing. A number of said bails control the decoding device for the character selection and an additional bail controls the device for the ''''No-print'''' function. Still another bail controls the high and low printing velocity. One or the other of these two last mentioned bails, or both simultaneously, control equally the shift device for selecting one of two surface portions on the printing element.
Inventors
- 👤 U Menzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:33
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/08; B41J5/18; B41J5/22; B41J1/00; B41J1/60; B41J7/00; B41J7/54; B41J7/56; B41J7/64
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
243 words
A typewriter comprising a platen (4), a driving shaft (5) exteNding parallel to said platen and adapted to rotatable for a definite angular value during each print cycle, a carriage (3) movable along said shaft (5) along a line of writing and carrying at least one printing element (1) having a plurality of characters on its surface (2) distributed into two groups, a shift device which permits selection at will of one of said two groups of characters, a selection device for bringing one of the characters of the group selected into printing position, an impression control device comprising means to impart at least two different printing velocities to said printing element (1), and means to establish a ''''print'''' or ''''no-print'''' mode during an operating cycle, a coding device supplying orders coded in the form of impulses through the actuation of the keys of the typewriter keyboard, a decoding device comprising a set of pulleys (15-19) movable with respect to each other and controlling a pulley (12) selectively rotatably driving the printing element (1) by means of a flexible tape (13), and means for actuating and moving said pulleys, said decoding device also including a device for transmission of the coded orders from the fixed portion of the typewriter to the carriage (3), said set of pulleys being carried entirely by said carriage (3), and said decoding device controlling said shift device, the character selection device as well as the impression control device.
Claim 2
Dependent Claim
243 words
A typewriter comprising a platen (4), a driving shaft (5) exteNding parallel to said platen and adapted to rotatable for a definite angular value during each print cycle, a carriage (3) movable along said shaft (5) along a line of writing and carrying at least one printing element (1) having a plurality of characters on its surface (2) distributed into two groups, a shift device which permits selection at will of one of said two groups of characters, a selection device for bringing one of the characters of the group selected into printing position, an impression control device comprising means to impart at least two different printing velocities to said printing element (1), and means to establish a ''''print'''' or ''''no-print'''' mode during an operating cycle, a coding device supplying orders coded in the form of impulses through the actuation of the keys of the typewriter keyboard, a decoding device comprising a set of pulleys (15-19) movable with respect to each other and controlling a pulley (12) selectively rotatably driving the printing element (1) by means of a flexible tape (13), and means for actuating and moving said pulleys, said decoding device also including a device for transmission of the coded orders from the fixed portion of the typewriter to the carriage (3), said set of pulleys being carried entirely by said carriage (3), and said decoding device controlling said shift device, the character selection device as well as the impression control device.
Claim 3
Dependent Claim
50 words
A typewriter according to claim 1, wherein said coded order transmission device comprises two universal bars (81, 77) controlling said shift device, the first universal bar (81) controlling the shift function, the second universal bar (77) controlling the locking of said shift device as well as said impression control device.
Claim 4
Dependent Claim
176 words
A typewriter according to claim 1, wherein the means for moving the pulleys (15-19) of said set of pulleys comprises linking elements (30) for each pulley, wherein said pulleys (15-19) are driven by a single actuating member (49) also mounted on said carriage (3), said actuating member (49) controlled by said driving shaft (5) and having a cyclical reciprocating movement imparted thereto, movement transforming means for each linking element (30) provided on said carriage (3) so as to transform movements of approximately equal amplitudes of said linking elements (30) into movements of different amplitudes of said pulleys (15-19), coupling elements (34) also mounted on the carriage (3), each said coupling element acting upon a linking element (30) and capable of assuming two positions, a first position in which the corresponding linking element (30) is susceptible of being driven by the actuating member (49) and controls a movement of specific amplitude of the corresponding pulley (15), a second position in which the corresponding linking element (30) is not susceptible of being driven by said actuating member (49).
Claim 5
Dependent Claim
137 words
A typewriter according to claim 3, wherein means are provided to impart to the corresponding pulley at the beginning of the printing cycle, a movement acting on the length of the free portion of the flexible tape (13), comprising a movable stop (60), movable by a coupling element (62) and susceptible of assuming two positions under the action of the corresponding universal bar (64), a first position in which the stop (60) is in the way of the linking element (55) preventing the latter from following the movement of the single actuating member (49), a second position in which said stop (60) is out of the way of said linking element (55), the latter then being capable of following the movement of the actuating member (49) under the action of the tension of the flexible tape (13).
Claim 6
Dependent Claim
125 words
A typewriter according to claim 3, wherein the movement transforming elements each comprise a lever (26) pivotally mounted on a base plate (20) integral with the carriage (3) of the typewriter, some of said levers supporting, on the one hand, one of the pulleys (15) of the set of pulleys and hinged, on the other hand, to one of the Linking elements (30), at least one of the pulleys (15) of the set of pulleys being supported by an element (22, 23) hinged on base plate (20), one arm of the corresponding movement transforming lever (26) being susceptible of acting on said element under action of the corresponding linking element (30) hinged on said lever to control the movement of specific amplitude of said pulley.
Claim 7
Dependent Claim
51 words
A typewriter according to claim 3, wherein the movement transforming levers (26) each comprise two arms forming an angle of approximately 90* and having different lengths, one of said arms hinged to a linking element (30), the other arm controlling the movement of the corresponding pulley of the set of pulleys.
Claim 8
Dependent Claim
48 words
A typewriter according to claim 1, wherein the impression control means are associated with the control means of the shift device, said shift device being controlled by two intermediary coupling slides (78, 82), one of said coupling slides (78) also used to select the light impression control device.
Claim 9
Dependent Claim
51 words
A typewriter according to claim 7, wherein said typewriter includes means to maintain said intermediate coupling slides (78, 82) in their lower position during the greatest part of the print-selection cycle, said means comprising two locking levers (86, 87) which move simultaneously with the pivoting of said single actuating member (49).
Claim 10
Dependent Claim
81 words
A typewriter according to claim 7, wherein the intermediate coupling slide (78) controls a locking device (91, 93, 95, 99, 101) for the arms of the movement transforming lever (22, 23), so as to retain beyond the duration of a printing cycle at least one of the pulleys (15) of said set of pulleys in a position corresponding at least approximately to the maximum amplitude of its movement under the action of the cyclical reciprocating movement of said actuating member (49).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |