33 Keyboard

This document provides a comprehensive technical overview and description of the Teletype Corporation "33" keyboard. It covers the general operation, technical data, and detailed mechanical principles for both nonparity and parity keyboard versions.

Key aspects of the document include:

• Operating Principles: Explains how the electromechanical keyboard translates key presses into parallel ASCII code combinations using a codebar mechanism, and how this is converted into serial start-stop signals via a distributor mechanism.
• Functional Mechanics: Provides detailed descriptions of components, including the codebar mechanism, universal codebar mechanism, keyboard contact mechanism, line break, repeat, and "HERE IS" functions.
• Configuration & Customization: Details options for 3300 Series Coded Sets and Computer Input/Output (I/O) sets, including wiring options for parity, and the addition of locking mechanisms for computer-controlled operations.
• Maintenance & Technical Data: Lists environmental specifications (40°F to 110°F), transmission codes, and provides cautions for safe maintenance and inspection.

The document also includes schematic diagrams illustrating the logic of parity vs. nonparity operations and mechanical drawings for the various sub-assemblies. Note that this file also contains several appended technical sections (marked as pages 15-103) covering Lubrication and Disassembly/Reassembly procedures for both the "33 Keyboard" and the "33 Typing Unit."