The Journal • Mechanics

How a typewriter
actually works

No chip, no motor. Nothing but precision mechanics — and the journey from a single press of a finger to ink on paper.

A typewriter is clockwork for writing : dozens of levers, a fan of steel, a rubber roller and an inked ribbon, all orchestrated in a few thousandths of a second. Let's look closer.

Inside the mechanism

01

The platen

The hard rubber roller that takes the strike and advances the sheet, line after line.

02

The two-colour ribbon

Black and red. A vibrator lifts it exactly at the moment of impact, then drops it straight back.

03

The fan of typebars

Some forty typebars, aligned by the segment towards a single point.

04

The printing point

Where, in a flash, the type crushes the ribbon against the paper. A letter is born.

The mechanism

The journey of a keystroke

From your finger to the printed letter, it all happens in a few thousandths of a second.

  1. 01

    The key

    You press. The key lever pivots on its axis, the fulcrum of the keyboard.

  2. 02

    The linkage

    The lever pulls a link connected to the heel of the typebar — the bar that will strike.

  3. 03

    The segment & the typebar

    The typebar pivots in the segment, the fan that aligns the bars. Because the arm is far longer above the pivot than below it, a small movement becomes a wide, fast arc.

The carriage holds the platen and moves one step with every strike.
  1. 04

    The ribbon

    Just before impact, the vibrator lifts the inked ribbon into the line of fire — then drops it so you can see what you have just typed.

  2. 05

    The platen

    The type crushes the ribbon against the sheet, wrapped around the hard rubber platen that cushions the blow and gives a crisp impression.

  3. 06

    The escapement & the carriage

    A cam releases the escapement: the carriage advances exactly one step (2.54 mm in Pica). At the end of the line the bell rings; the return lever brings the carriage back and turns the platen by one line space.

On this Olivetti Lettera 32, the fan of typebars is visible in the centre.

Did you know

1868Christopher Latham Sholes's founding patent
~42Typebars in the basket
2.54 mmOne character step (Pica, 10 chars/inch)
<5 msThe ribbon vibrator's window on every strike

Your turn to write

Every mechanism, restored by hand

We strip, clean and adjust every one of these parts so that our typewriters are ready to type — just like on day one.