| 摘要 |
Inertia pens, or writing or marking devices wherein the writing or marking element is shifted into the operating position by axial impulse. The kinetic energy of the impulse is transmitted to a calibrated mass slide within the pen which slide transfers its energy to the writing or marking element. A return spring is provided and the pen may be simple, compound, binary or multifunctional. The mass slide obviates the need for a push button or other manual actuator, and therefore writing or marking elements may be provided at both ends. The pen is refillable and retractable. This is a divisional of application Ser. No. 94,759, now U.S. Pat. No. 4,315,695, filed Nov. 16, 1979.
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