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Pitch

Definition

The number of characters per horizontal inch in typewritten text; standard values are 10 (Pica), 12 (Elite), and proportional (IBM Executive, Varityper).

Definition
Characters per horizontal inch in typewritten text
Pica
10 characters per inch
Elite
12 characters per inch
Proportional spacing
IBM Executive and Varityper machines

Common questions

Why is pitch useful for narrowing down the machine used to type a document?+

Measuring characters per inch on a questioned document quickly separates it into broad machine families before individual letterform comparison, since a document typed at Elite pitch could not have come from a machine set only to Pica.

How does proportional spacing complicate a pitch measurement?+

On machines like the IBM Executive, each character occupies a width matched to its shape rather than a fixed unit, so a simple characters-per-inch count does not apply and examiners instead compare individual character widths and spacing patterns.

Related terms

Carbon-Film Ribbon
A single-strike typewriter ribbon with a carbon coating that transfers completely to paper on impact, enabling high-quality impressions; the used ribbon retains...
Class Characteristic
A feature shared by an entire group of objects (every shoe of one model has the same sole tread; every tire of...
Daisy Wheel
A circular print element with flexible plastic spokes each bearing a character, used in electronic daisy-wheel typewriters and printers from the late...
Filled Counter
An enclosed space within a letter (the interior of 'e', 'o', 'p') that has become partially or fully occluded by accumulated ink...
Golf Ball (Type Element)
The spherical interchangeable type element on IBM Selectric typewriters, carrying 88 characters and replaceable to change typeface without changing the machine.
Individual Characteristic
A characteristic unique to a specific typewriter unit arising from manufacturing variation or service wear; used to identify or eliminate a specific...
Out-of-Alignment Character
A typewritten character consistently displaced vertically, horizontally, or rotationally from its expected baseline position, resulting from a bent typebar, worn guide slot,...
SWGDOC
The Scientific Working Group for Forensic Document Examination (US), which publishes standards for typewriter examination, handwriting comparison, ink analysis, and related forensic...
Typebar
A pivoting lever carrying a metal type slug that strikes the ribbon and paper when a key is depressed on a mechanical...

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