Carrier locking device

Details Carrier locking device Carrier locking device

1981-05-06

1983-09-13

Wright, Jr., Ernest T.

Typewriting machines

Locking or interlocking mechanism

For locking carriage in centered position

400 54, 400320, 400322, B41J 2956

Patent

active

044038798

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.

REFERENCES:
patent: 1599822 (1926-09-01), Kurowski
patent: 2568002 (1951-09-01), Hart et al.
patent: 3239051 (1966-03-01), Morris et al.
patent: 3719263 (1973-03-01), Navone
patent: 4114750 (1978-09-01), Baeck et al.
IBM Technical Disclosure Bulletin, "Carriage-Locking Mechanism", Wilmoth, vol. 22, No. 12, May 1980, pp. 5229-5230.

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