Abstract A calculating device for a duplicator comprises a first driving ratchet wheel fixed to a shaft of a calculating meter and a second ratchet wheel loosely mounted on the shaft. The second ratchet wheel is urged by a spring to an initial predetermined position and a pawl is positioned adjacent the ratchet wheels to drive them each time a copy of an original is made by the duplicator. Each time the pawl is driven, each of the ratchet wheels is rotated through one tooth. The second ratchet wheel has a protruded toothless portion to engage the pawl after a predetermined rotation of the second ratchet wheel in order to prevent engagement of the pawl with the driving ratchet wheel. Consequently the calculating meter will only indicate the number of copies made up to a predetermined number. A retaining pawl engages the second ratchet wheel to prevent return thereof to its original position until an original to be copied is replaced in the duplicator by another original.
A calculating device for a duplicator comprising a driving ratchet wheel fixed to a shaft of a calculating meter, a second ratchet wheel loosely mounted on said shaft, means acting on the second ratchet wheel to urge the same to an initial predetermined position, and a pawl driven each time a copy of an original is made by the duplicator to rotate each of said ratchet wheels through one tooth for each copy, said second ratchet wheel having a protruded, toothless portion to engage said pawl after a predetermined rotation of said second ratchet wheel and prevent engagement of the pawl with the driving ratchet wheel.
Claim 2
Dependent Claim
106 words
A calculating device for a duplicator comprising a driving ratchet wheel fixed to a shaft of a calculating meter, a second ratchet wheel loosely mounted on said shaft, means acting on the second ratchet wheel to urge the same to an initial predetermined position, and a pawl driven each time a copy of an original is made by the duplicator to rotate each of said ratchet wheels through one tooth for each copy, said second ratchet wheel having a protruded, toothless portion to engage said pawl after a predetermined rotation of said second ratchet wheel and prevent engagement of the pawl with the driving ratchet wheel.
Claim 3
Dependent Claim
45 words
A calculating device as claimed in claim 1 further comprising a retaining pawl engaging the second ratchet wheel to prevent return thereof to its original position, and means for releasing the retaining pawl each time an original to be copied is replaced in the duplicator.
Claim 4
Dependent Claim
49 words
a calculating device as claimed in claim 2 wherein said means for releasing the retaining pawl comprises an actuating member for acting on said retaining pawl, an electromagnetic controlling the operation of said actuating member, and means for operating said electromagnet when an original to be copied is replaced.
Claim 5
Dependent Claim
30 words
A calculating device as claimed in claim 3 wherein said means for operating the electromagnet comprises a magnetic switch controlled by the operation of a holding plate for an original.
Claim 6
Dependent Claim
21 words
A calculating device as claimed in claim 1 comprising adjustable means for regulating said predetermined position of said second ratchet wheel.