| Year | 1919 |
| Date | 08-May |
| Volume | 40 |
| Issue | 941 |
| Page | 354 |
| Category | General |
| Part | 2 |
| Title | The Principles of Typewriter Mechanism |
| Author | Nathan Sharpe |
| Notes | The Hammond. Tpy "typewheel" machine showing type, shuttles, anvils & driving arms, plan showing anvil & surrounding gear in position, driver arm in rest & extreme printing positions, driving levers, general view of "setting" mechanism, general view escapement & hammer mechanism, straight "line" diagram of machine action, plan & elevation of escapement mechanism, carriage release mechanism, ribbon gear, shift-key mechanism, cross section through carriage |