Typewriter

The patent names Sholes, Glidden AND Soule. It is usually called the Sholes and Glidden machine after the later commercial model — the patent itself has three names on it.

Every typebar must strike the SAME point, because that is where the paper is presented. All the difficulty follows from this one requirement.

Make two pivoting arms aimed at one point. Strike them in quick succession and watch them tangle. You have just reproduced the jam, and everything else is a response to it.

Make a curved plate — the segment — with a slot per bar, arranged so all the arcs converge. Spacing here fixes everything downstream.

Every bar must swing and return at the same rate. A heavy bar lingers in the strike zone and is the one that jams against its neighbour.

Fix a raised, mirror-image letter at the tip. Mirrored, because it prints by direct contact — the same convention as movable type.

Each bar must fall back the instant the key is released. Sluggish return is the direct cause of jamming, so tune these before blaming the layout.

Run a linkage from each key to its bar. The leverage ratio decides how hard the machine is to type on and how hard it strikes the paper — the same trade-off.

The paper wraps a roller which advances one line at a time and moves sideways one character per strike. The paper moves; the bars do not.

Fit a toothed rack and a pawl that releases exactly one tooth per strike. This is a clock escapement doing letter spacing — borrowed wholesale from horology.

Run an inked ribbon across the strike point. The slug never touches ink directly, so it stays clean and the letter stays sharp.

Try an A-B-C layout first. Common pairs like TH, ER and ST sit adjacent and jam constantly — this is the experiment that produced QWERTY.

Move the letters of common digraphs to opposite sides of the basket and retype the same paragraph. Count the jams before and after — that number is the whole justification for QWERTY.

Type twenty M's in a row. They should sit on one baseline at even spacing; drift reveals escapement or platen faults immediately.

The patent. US 79,265, "Improvement in Type-Writing Machines", granted 23 June 1868 to C. Latham Sholes, Carlos Glidden and Samuel W. Soule of Milwaukee, Wisconsin. Sholes was a newspaper editor and printer. The machine went through many revisions before Remington began manufacturing it in 1873 as the Sholes and Glidden Type-Writer — Soule's name drops out of the popular account, though it is on the patent.

Why the jam is unavoidable. All typebars must converge on a single printing point, so the strike zone is shared. Bar A must have cleared the zone before bar B arrives, and at typing speed the interval is a fraction of a second. Return spring strength, bar mass and pivot friction all set the clearing time, but no amount of tuning removes the collision risk for two bars that start adjacent and swing along nearly the same arc.

QWERTY is a mechanical solution, and the usual story about it is too simple. The layout evolved through the 1870s in consultation with users, including telegraph operators, and it does separate many frequent English digraphs across the basket. The popular claim that it was designed "to slow typists down" is wrong — the goal was to avoid jams so typists could go FASTER without stopping to untangle bars. It is equally wrong to present it as an optimum: TH and ER are notoriously still awkward, and the layout is a compromise reached commercially, not a computed solution. Dvorak's 1936 alternative is measurably better on paper and has never displaced it, which makes QWERTY a standard example of technological lock-in.

What the machine borrowed and what it changed. The escapement stepping the carriage one character at a time is lifted from clockmaking. The mirrored raised slug is movable type reduced to one letter on a lever. What was genuinely new was the combination — a keyboard that selects a character mechanically, at speed, with the paper doing the moving. The social consequence was larger than the mechanical one: typing became one of the first office occupations widely open to women, and the machines were marketed accordingly. The last thing this patent still touches is the arrangement of the keys under your fingers, preserved for a jam that stopped being possible decades ago.