Carrier locking device
US4403879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1981 |
| Grant date | Sep 13, 1983 |
| Priority date | — |
| Expiry date | May 6, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/58
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A carriage locking device is used for locking a transversely movable carrier in a typewriter to safeguard against damage when the typewriter is not in typing use, especially during shipping transport. The device includes a pair of blades operable between a released position for enabling the carrier to travel sideways and a locked position for engageably holding the carrier fast in the typewriter. A lock control linkage is coupled to the blades for allowing the operator selective movement thereof to shift the blades between the two positions. The blades move into and out of a recess on the carrier which is only allowed to occur when the carrier is stopped at a predetermined location. A sensor lever includes a latching feature that operates in response to the carrier being away from the predetermined location to block movement of the lock control linkage for maintaining the blades in the released position. An abutment fixed on the carrier moves the sensor lever to free the lock control linkage for selective movement to shift the blades into the locked position when the carrier comes to rest at the predetermined location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.