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Albert Sands Southworth
Plate-Holder for Cameras (Daguerreotype Camera Attachment)
1855, 10 April
Patent illustration
Google Books
LL/77209
US Patent no: 12700A
https://patentimages.storage.googleapis.com/cd/36/6c/1277d7647b629e/US12700.pdf
"My invention consists in a peculiarly-arranged frame in which the plate-holder is permitted to slide, by which means I am enabled to take four daguerreotypes upon one plate and at one sitting, diierent portions of the plate being brought successively opposite an opening in the frame, the opening remaining stationary in the axis of the camera while the plate-holder and plate are moved."
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