Detent device for a key shaft of a printing mechanism

Details Detent device for a key shaft of a printing mechanism Detent device for a key shaft of a printing mechanism

1977-03-24

1978-06-27

Coven, Edward M.

Printing

Selective or progressive

Printing members

101111, 101288, B41J 122

Patent

active

040968006

ABSTRACT:
A Detent device for a key shaft of a printing mechanism, in particular for price marking apparatus, in which the printing types are settable by means of positioning wheels mounted juxtaposed rotatable about an axis, said positioning wheels having internal gearing into which pinion is capable of being engaged which is secured to the axially adjustable key shaft and in which the key shaft cooperates with a detent device which has detent recesses arranged juxtaposed in spacings corresponding to the widths of the wheels parallel to the key shaft according to the number of the positioning wheels as well as a detent resiliently engaging therein and in which on the key shaft a pointer extending over the circumference of the positioning wheels and being arranged with its point in a plane extending at a right angle to the key shaft and passing through the pinion is secured non-shiftable axially and is guided secured against rotation in the housing of the printing mechanism, characterized in that the pointer has a detent projecting at a right angle to the key shaft and arranged in a plane passing through the pinion and through the point of the pointer, said detent engaging in the detent recesses of a detent rail arranged parallel to the key shaft.

REFERENCES:
patent: 660512 (1900-10-01), Humphrey et al.
patent: 828478 (1906-02-01), Hodge
patent: 940186 (1909-11-01), O'Heson
patent: 1341021 (1920-05-01), Robbins
patent: 1868997 (1932-07-01), Speicher
patent: 3307672 (1967-03-01), Young
patent: 3309987 (1967-03-01), Pexton
patent: 3948172 (1976-04-01), Jenkins

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