Typewriting machines – Key-board or key lever-actuating mechanism – Including means generating a signal for type selecting or...
Patent
1977-09-19
1978-12-05
Sewell, Paul T.
Typewriting machines
Key-board or key lever-actuating mechanism
Including means generating a signal for type selecting or...
400666, 400668, B41J 2308, B41J 524
Patent
active
041283821
ABSTRACT:
A keyboard of a typewriter comprises a common actuator biased by a spring. The depression of a key causes a corresponding intermediate member to engage with the actuator to initiate an operating cycle and to move the intermediate member to a position which causes selection of an operation corresponding to the key which has been depressed. The engagement of the common actuator with more than one intermediate member consequent upon depression of more than one key causes the common actuator to move under the spring bias at a substantially reduced speed and a locking mechanism to lock selected operations. A reloading mechanism is responsive to the speed of the actuator for unlocking the locking mechanism and restoring the actuator and the intermediate member when the reduced speed is sensed.
REFERENCES:
patent: 3642110 (1972-02-01), Hishida et al.
patent: 3664478 (1972-05-01), Menicanti et al.
patent: 3718243 (1973-02-01), Chvatlinsky
patent: 3759360 (1973-09-01), Rix et al.
patent: 3828909 (1974-08-01), Roano et al.
patent: 3882987 (1975-05-01), Link
patent: 3957149 (1976-05-01), Salto
patent: 4027763 (1977-06-01), Salto
Ing. C. Olivetti & C. S.p.A.
Sewell Paul T.
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