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8. MECHANISM AND OPERATION PRINCIPLE
8-1. Mechanism
As illustrated in Fig. 3, the Model NT 65A3 can be generally divided into four sections:
output section, control valve section, driving section and magazine section.
The basic construction of the Model NT 65A3 is the same as that of the Model NT 65A2. The magazine section is
common to that of the Model NT 65A2. However, most of the parts of the control valve section were changed to
provide the single actuation (single sequential actuation)/contact actuation mechanisms in order to correspond to
the modification of the ANSI standard. The pushing lever of the driving section was newly designed. Besides,
some parts of the output section were changed.
Primary differences from the Model NT 65A2 are described below.
Output section ..................
Cylinder: Newly designed. {A hole (1-mm dia.) was provided to prevent
malfunction when selecting the single actuation (single sequential
actuation) mechanism.}
Cylinder spring: Newly designed.
Exhaust valve: Newly designed.
Body .................................. An air escape groove was provided at the inmost position of the trigger valve
bushing ass'y. (Refer to 8-2 (1) for details.)
Driving section .................. Pushing lever: Newly designed.
Control valve section ......... Following parts were changed or added owing to the change of the construction
(selectable either the single actuation mechanism or the contact actuation
mechanism).
Plunger (A): Newly designed.
Plunger (B): Newly designed.
Plunger (B) spring: Newly designed.
Valve bushing: Newly designed.
Valve sleeve (switching device): Newly designed.
