G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
G09C3/00—Typewriters for ciphering or deciphering cryptographic text
G09C3/04—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member
G09C3/06—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member the connections being mechanical
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Physics & Mathematics
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General Physics & Mathematics
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Engineering & Computer Science
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Theoretical Computer Science
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Record Information Processing For Printing
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Accessory Devices And Overall Control Thereof
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