Keyboard recocking mechanism
AssigneeIng. C. Olivetti & C., S.p.A.
InventorGillio Claudio
Life of this patent
Estimating the term…
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.
Claims13
A keyboard for a printing machine comprising a series of depressable keys;
- a series of intermediate members associated with said keys and each selectable by depression of one of said keys;
- a common actuator actuatable from an inoperative position to an operative position;
- spring means moving said common actuator to said operative position in response to moving of each of said keys, said common actuator engaging the selected intermediate member and moving said selected intermediate member to a predetermined speed;
- operative means associated to said intermediate members for performing a selected operation upon movement of said intermediate members;
- reloading means operative for returning said common actuator to said inoperative position for reloading said spring means upon performing of the selected operation;
- locking means for stopping the operation of said operative means and causing the return of said common actuator whereby blocking further operations of said operative means in the case when two keys are simultaneously depressed, said common actuator engaging said two selected intermediate members but being moved by said spring means at a speed substantially reduced with respect to said predetermined speed and unblocking means responsive to the reduced speed of said common actuator for returning said common actuator to said inoperative position, in the place of said reloading means whereby enabling the further performing of operations by said operating means.
In a keyboard of an electric typewriter, teleprinter, accounting machine and like machines comprising a series of depressable keys;
- a series of intermediate members associated with said keys and each one of said intermediate members being selectable by a corresponding one of said keys;
- a common actuator engageable with said selected one of said intermediate members;
- spring means operative on said common actuator for moving the selected one of said intermediate members at a predetermined speed to a set position and operative means responsive to the set position of said intermediate members for performing a selected operation corresponding to the key which has been depressed;
- the engagement of said common actuator with more than one intermediate member consequent upon simultaneous depression of more than one key causing said common actuator to move under said spring means bias at a substantially reduced speed with respect to said predetermined speed, the combination comprising:
- a sensor responsive to the speed of said common actuator;
- blocking means controlled by said sensor and arranged to block the movement of said common actuator and said operative means when said substantially reduced speed is sensed;
- and
- recocking means further responsive to said sensor to recock said common actuator and said intermediate members to recocked positions ready for initiation of other operations by depression of said keys.
In a keyboard for typewriters, teleprinters, calculating, accounting and like machines of the type comprising a series of depressable keys;
- a series of intermediate members movable from an inoperative position to a working position and each one of said intermediate members being selectable by a cooresponding one of said keys;
- a common actuator movable with the selected one of said intermediate members;
- a starting clutch;
- spring means moving said common actuator to a predetermined speed for actuating the starting clutch and the selected one of said intermediate member in the working position;
- a reloading element actuated by said starting clutch for bringing the common actuator back to a recocked position;
- and a locking mechanism for arresting the common actuator in a locking position insufficient for activation of the starting clutch in the case of engagement with two intermediate members consequent upon depression of more than one key, said spring means bias causing said common actuator to move at a substantially reduced speed with respect to said predetermined speed;
- the combination comprising:
- an entraining element synchronous with the common actuator;
- a sensor element responsive to the speed of said common actuator to be moved from an inoperative position at said predetermined speed of the common actuator to an operative position, when the common actuator moves at said substantially reduced speed, said sensor element engaging the entraining element, in the operative position thereof;
- a recocking mechanism countinuously oscillating and engageable with said sensor element in said operative position to bring the common actuator back from the locking position to the recocked position through the medium of said sensing element engaged in the entraining element and independently of the reloading element.
Dependencies are inferred from the claim text.