Patent US3924724A successfully refreshed from Google Patents.
US3924724A
Expired / Lapsed
US
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Structure for facilitating interchange of typing elements
Assignee: Olympia Werke AG
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Filing: 1975-03-19
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Granted: 1975-12-09
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Expires: 1995-03-19
Abstract
Abstract In order to facilitate the interchange of typing elements of the type having a cap at their top and arranged to be interchangeably installed on the element post of a typing machine, and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post, there is provided a member which defines a cover arranged to close the container in a hermetically sealed manner, and the cover is provided with a coupling unit which serves to connect the cover to the typing element cap while holding the locking device in its unlocking position, and a control member which can be actuated to disconnect the cover from the cap in order to permit the cover to be removed from the typing element, the locking device being enabled to move to its locking position upon removal of the cover from the cap.
Inventors
- 👤 Gunter Kerzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:55
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/60; Y; Y10; Y10S; Y10S206/00; Y10S206/804
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
197 words
In combination: a typing element having a cap at its top and arranged to be interchangeably installed on the element post of a typing machine and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post; and a member defining a cover arranged to close the container in a hermetically sealed manner, wherein the improvement comprises: detent coupling means arranged to selectively connect said cover to said cap for permitting said typing element to be moved as a unit with said cover; spring means normally maintaining said detent coupling means in the position for creating such connection between said cover and said cap; and latch means carried by said cover for holding said locking means in said unlocking position when said cover is connected to said cap and for enabling said locking device to move to said locking position when said cover is separated from said cap.
Claim 2
Dependent Claim
197 words
In combination: a typing element having a cap at its top and arranged to be interchangeably installed on the element post of a typing machine and to be stored in a container when not on the machine, the element being provided, in the vicinity of its upper extremity and below the cap, with a locking device movable between a locking position in which it fastens the element to the post and an unlocking position in which it permits the element to be lifted from the post; and a member defining a cover arranged to close the container in a hermetically sealed manner, wherein the improvement comprises: detent coupling means arranged to selectively connect said cover to said cap for permitting said typing element to be moved as a unit with said cover; spring means normally maintaining said detent coupling means in the position for creating such connection between said cover and said cap; and latch means carried by said cover for holding said locking means in said unlocking position when said cover is connected to said cap and for enabling said locking device to move to said locking position when said cover is separated from said cap.
Claim 3
Dependent Claim
96 words
An arrangement as defined in claim 1 wherein said cap is provided with a plurality of openings, and said latch means comprise a plurality of fingers projecting from that side of said cover which faces toward the interior of said container when closing said container, said fingers being arranged to engage through respective ones of said openings, and said detent coupling means comprise a plurality of detent ridges each carried by a respective one of said fingers and extending laterally past the border of a respective opening to thus selectively connect said cover to said cap.
Claim 4
Dependent Claim
115 words
An arrangement as defined in claim 2 wherein said spring means comprise a plurality of resilient arms each carried by a respective one of said fingers and each carrying a respective one of said detent ridges, and said detent coupling means further comprise a convexly curved spring disc operatively associated with said resilient arms in a manner such that flattening of said disc moves said ridges in a direction to release the connection between said cover and said cap, and a push button located at the center of said cover and operatively associated with said disc in such a manner that pressure on said button serves to move said disc in the direction of flattening.
Claim 5
Dependent Claim
142 words
An arrangement as defined in claim 3 wherein said locking device comprises a plurality of blocking slides presenting blocking edges arranged, when said typing element is installed on the element post of a typing machine, to be disposed concentrically to an annular locking groove provided on the element post and to engage in such locking groove to define the locking position of said deviCe, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear such groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the locking position of said device when said cover is separated from said cap.
Claim 6
Dependent Claim
162 words
An arrangement as defined in claim 3 further comprising an element post on which said typing element is to be installed, said post having an annular locking groove presenting a conical configuration in the direction of movement of said locking device, and said locking device comprises a plurality of blocking slides presenting blocking edges disposed concentrically to said locking groove when said element is on said post and arranged to engage in said locking groove to define the locking position of said device, each said blocking slide being operatively associated with the extremity of a respective one of said fingers of said latch means, said extremities of said fingers bringing said blocking slides into a position in which said blocking edges clear said locking groove, constituting the unlocking position of said device, when said cover is connected to said cap, and permitting said blocking slides to move to the locking position of said device when said cover is separated from said cap.
Claim 7
Dependent Claim
34 words
An arrangement as defined in claim 4 wherein said locking device further comprises a common spring ring connected to all of said blocking slides for urging them into the locking position of said device.
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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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |