Most of what little I know about the 'Monophoto' Model 400 (aka Model 400/31) comes from a brochure for its successor, the "'Monophoto' 400/8 Filmsetter" and from a third-party booklet, The Monotype: How it Works [etc.] (reprinted at: CircuitousRoot Typefoundry and Press -> Composing Typecasters -> General Monotype Literature -> The Monotype[:] How it Works [etc.] ) This booklet was published in 1957, which gives a date by which the 'Monophoto' must have been introduced.
The Model 400/31 employed a 31-channel paper tape (that is, a wide paper tape with 31 punch positions). I think that this tape is compatible with the traditional Monotype keyboard (the booklet The Monotype[:] How it Works [etc.] says that "The 'Monophoto' machine is actuated by the perforated paper ribbon prepared on the Monotype Keyboard." (p. 11)).
It had a matrix case which was visually very similar to a traditional Monotype composition matrix case, holding in this case 400 interchangeable matrices (each still 0.2 inches square) with, I presume, photographic images of a type on each.
The two images above are from the brochure: "'Monophoto' 400/8 Filmsetter".
The two images from "'Monophoto' 400/8 Filmsetter" are in copyright in the UK and US, although it is not clear who now owns this copyright. Their use here, to illustrate a historic machine when no alternative photograph is available, and not to reprint the document in which they appeared, is, I believe, within "fair use" as permitted by US copyright law. Please note that any further use of these images may not be within "fair use"; they are not licensed here under the same Creative Commons license as the rest of this page.
All portions of this document not noted otherwise are Copyright © 2012 by David M. MacMillan and Rollande Krandall.
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