Abstract: A printing device including a print hammer having a noise dampener for use with an impact printer mechanism. The print hammer has a significant mass for impacting a character pad against an ink ribbon, paper and a platen. In a first embodiment the print hammer includes an acoustic noise dampening layer interposed between a mass weight and the hammer face which carries the anvil that impacts during printing. In other embodiments the print hammer is formed in two parts. One part having a weighted mass and the other part being pivotally coupled to the printer mechanism. The two parts are structurally joined together by a noise dampening member. Transmission of acoustic noise during impact printing through the hammer is reduced.

Abstract: An integral locking device for a typewriter is used to safeguard against damages and to prevent a correction ribbon from feeding when the typewriter is transported. The integral locking device locks a carrier in a predetermined channel position, locks the correction bail on the carrier to prevent correction ribbon feed, and jams a correction ribbon feed release device.

Abstract: A strip chart recorder and method for recording trend signals representative of a physiological condition on a strip chart responsive to the occurrence of an alarm condition. Trend signals representative of said physiological condition in the past are stored. Upon the occurrence of the alarm condition, the stored trend signals are recorded at a faster than real time rate.

Abstract: A strip chart recorder and method for recording trend signals representative of a physiological condition on a strip chart responsive to the occurrence of an alarm condition. Trend signals representative of said physiological condition in the past are stored. Upon the occurrence of the alarm condition, the stored trend signals are recorded at a faster than real time rate.