US3776130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking arrangement for manually set printing wheels
Assignee: Janome Corp
•
Filing: 1972-10-06
•
Granted: 1973-12-04
•
Expires: 1992-10-06
Abstract
Abstract A set of printing wheels with circumferentially spaced types and arresting recesses, can be set to digital printing positions by manual setting means. An axial row of spring biassed arresting pawls engages a row of the arresting recesses, and yield resiliently while the printing wheels are turned during setting to a selected number. The pawls have locking recesses cooperating with a locking bar extending at right angles to the direction of movement of the pawls to the arresting position. A carriage with a platen roller is manually moved out of an end position along a path over the printing wheels. The carriage is operatively connected with the locking bar so that the locking bar is ineffective in the end position of the carriage while the printing wheels are set, and engages the locking recesses in the pawls when the carriage moves out of the end position so that the wheels cannot be displaced by the platen roller during printing.
Inventors
- 👤 Y Tamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:38
CPC Classifications
B; B41; B41J; B41J5/00; B41J5/02; B41J5/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
345 words
Locking arrangement for manually set printing wheels, comprising supporting means; carriage means including a platen roller and being supported on said supporting means for movement with said platen roller along a path between two end positions; a set of printing wheel means mounted on said supporting means for independent angular movement about an axis between a plurality of angular printing positions, and having a plurality of types and a plurality of arresting recesses associated with said angular printing positions, respectively; a set of setting means for turning said printing wheel means to selected angular printing positions, respectively, so that an axial row of selected types is located in said path of said platen roller; a set of arresting pawls arranged in an axial row opposite an axial row of arresting recesses, said pawls being movable in a substantially radial direction to and from arresting positions located in said arresting recesses, respectively, and having locking recesses forming an axial row when said pawls are located in said arresting recesses in said arresting positions; arresting spring means for biassing said pawls to said arresting positions so that said pawls resiliently yield when said type wheel means are angularly displaced by said setting means; locking means including a locking bar movable between an inoperative position spaced from said pawls, and a locking position located in said row of locking recesses, said locking bar in said locking position extending in axial direction at right angles to said radial direction so that said pawls are locked in said arresting recesses; and motion transmitting means connecting said carriage means with said locking means and holding said locking bar in said inoperative position when said carriage means is in one of said end positions so that said type wheel means can be set by said setting means, and holding said locking bar in said locking position when said carriage means moves out of said one end position so that said printing wheel means can not be angularly displaced out of selected angular printing positions by said platen roller moving along said path.
Claim 2
Dependent Claim
345 words
Locking arrangement for manually set printing wheels, comprising supporting means; carriage means including a platen roller and being supported on said supporting means for movement with said platen roller along a path between two end positions; a set of printing wheel means mounted on said supporting means for independent angular movement about an axis between a plurality of angular printing positions, and having a plurality of types and a plurality of arresting recesses associated with said angular printing positions, respectively; a set of setting means for turning said printing wheel means to selected angular printing positions, respectively, so that an axial row of selected types is located in said path of said platen roller; a set of arresting pawls arranged in an axial row opposite an axial row of arresting recesses, said pawls being movable in a substantially radial direction to and from arresting positions located in said arresting recesses, respectively, and having locking recesses forming an axial row when said pawls are located in said arresting recesses in said arresting positions; arresting spring means for biassing said pawls to said arresting positions so that said pawls resiliently yield when said type wheel means are angularly displaced by said setting means; locking means including a locking bar movable between an inoperative position spaced from said pawls, and a locking position located in said row of locking recesses, said locking bar in said locking position extending in axial direction at right angles to said radial direction so that said pawls are locked in said arresting recesses; and motion transmitting means connecting said carriage means with said locking means and holding said locking bar in said inoperative position when said carriage means is in one of said end positions so that said type wheel means can be set by said setting means, and holding said locking bar in said locking position when said carriage means moves out of said one end position so that said printing wheel means can not be angularly displaced out of selected angular printing positions by said platen roller moving along said path.
Claim 3
Dependent Claim
87 words
Locking arrangement as claimed in claim 1 wherein said locking recesses have slanted edges so that when said locking bar enters a misaligned locking recess of a pawl which is not fully in said arresting position due to a wrong angular position of the respective printing wheel means, said locking recess is aligned by said locking bar with the locking recesses of the other pawls whereby the respective pawl is placed in said arresting position for holding said printing wheel means in the respective angular printing position.
Claim 4
Dependent Claim
106 words
Locking arrangement as claimed in claim 1 wherein said motion transmitting means include locking spring means for urging said motion transmitting means to hold said locking bar in said locking position, and feeler means biassed by said locking spring means to engage a portion of said carriage means only when said carriage means is in said one end position for holding said locking bar in said inoperative position whereby when said carriage means moves out of said one end position and along said path, said portion releases said feeler means so that said locking spring means causes movement of said locking bar to said locking position.
Claim 5
Dependent Claim
30 words
Locking arrangement as claimed in claim 3 wherein said locking bar is moved by said motion transmitting means to said locking position in a direction transverse to said radial direction.
Claim 6
Dependent Claim
48 words
Locking arrangement as claimed in claim 3 wherein said carriage means includes a carriage on which said platen roller is mounted for rotation, and wherein said portion of said carriage means is a roller rotatably mounted on said carriage and rolling along said path on said supporting means.
Claim 7
Dependent Claim
34 words
Locking arrangement as claimed in claim 5 wherein said supporting means include a printing bed formed with a cutout through which said set of printing wheels partly projects,said cutout being located in said path.
Claim 8
Dependent Claim
90 words
Locking arrangement as claimed in claim 3 wherein said motion transmitting means include a bail mounted for angular movement about a bail axis on said supporting means and having two arms located at the ends of said row of pawls, said locking bar being mounted on the ends of said arms; and wherein said feeler means includes a feeler lever mounted on said supporting means for angular movement and being biassed by said locking spring means to engage said carriage portion in said one end position of said carriAge means.
Claim 9
Dependent Claim
50 words
Locking arrangement as claimed in claim 7 wherein said set of pawls is located in a plane passing through said axis; and wherein said bail axis is parallel to said axis so that said locking bar moves substantially perpendicularly to said plane from said inoperative position to said locking position.
Claim 10
Dependent Claim
33 words
Locking arrangement as claimed in claim 1 wherein each printing wheel means includes a printing wheel having circumferentially spaced types, and a gear portion having teeth and said arresting recesses between said teeth.
Claim 11
Dependent Claim
29 words
Locking arrangement as claimed in claim 8 wherein said set of setting means includes a set of rack bars meshing with said gear portions of said printing wheels, respectively.
References Cited (Backward Citations)
US3138091A
Cited
US3279369A
Cited
US3322062A
Cited
US3334582A
Cited
US3405634A
Cited
US3494282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |