A to Z Rubber Stamps RAPIDPRINT A Series, Manual

Page: 11 / 122

Type-wheel Operation (Model AR-E figure 4 )
The date/time type-wheels, located in the upper casting, operate independently of the
printing and ribbon mechanism. When plugged into a 110 VAC power source, the
synchronous motor
(a) will operate continuously, rotating the impulse cam (b) one
revolution per minute. The cam action pushes back the cam follower (c) and the connecting
arm (d) attached to it. The pull of the connecting arm takes with it the actuating pawl
swing assembly which includes the actuating pawl assembly (e) with its stepped, rake-like
teeth of varying heights. As the impulse cam (b) allows cam follower (c) to snap back down,
the first tooth of the pawl assembly, pushes the unit wheel forward one digit (once per
minute) by engaging the ratchet which is attached to the side of the wheel. At the tenth
minute, pawl tooth enters a drop in the unit wheel ratchet allowing the next pawl tooth to
engage the tens minute wheel. This process continues until the two wheels show 59
minutes. At this point, the hour wheel is engaged and the type-wheels indicating minutes
advance to zero.
At each twelve-hour period, the AM-PM wheel is advanced. At each 24-hour period the
date wheels also advance. This entirely automatic process continues until the end of the
month. At this point, the month wheels must be reset manually. The year wheel must also
be reset manually at year end.
The retaining pawls
(f) are held in position against the printing wheel ratchets by the
retaining pawl springs. The pawls serve to prevent over-throwing the wheels and ensure
proper alignment.
01/04/2012 11