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A mechanism that allows an acoustic hood to be an attractive, accessible, inexpensive attachment to the top cover of a typewriter is illustrated above.
English (United States)
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100% of the total text.
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Power Driven, Hide a Way, Acoustic Hood
A mechanism that allows an acoustic hood to be an attractive, accessible,
inexpensive attachment to the top cover of a typewriter is illustrated above.
This is accomplished by a rack system and a drive shaft with three pinions
located under the top cover above the ribbon mechanism.
The problem heretofore was how to open a sliding hood with a one-hand
operation on one side without the hood binding on the opposite side across the
wide opening on the top cover.
By molding a rack 10 (Fig. 1) on the bottom of each side 12 of the hood 14
and meshing two pinion gears 16 mounted on a drive shaft 18, this problem is
By placing an independent gear rack 20 (Fig. 2) under the cover 22 with a
handle 24 protruding and a third pinion on the drive shaft 18, a hand may now
power the shaft 18 independent of the hood 14, and the rotating drive shaft 18
will drive the hood 14 back evenly. This is done by exposing a handle 24, on the
slide 26, to the operator. With the pinions 16 (drive gears) now rotating in
engagement with each end of the hood 14, the hood 14 can now slide evenly
back and forth without binding.
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