Renseignements généraux

Nº de série

4088A1807

Nº de partie

1

Nombre total de parties

4

Ou

S/O

Brevets

S/O

Description générale

.1 Body made of metal/ .2 Bulbs made of glass & metal/ .3 Lighting unit made of metal. Pts made of wood.

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

S/O

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Imprimerie

Catégorie

Duplication

Sous-catégorie

S/O

Fabricant

Ou

Photostat

Pays

United States of America

État/province

New York

Ville

Rochester

Contexte

Pays

Inconnu

État/province

Inconnu

Période

Inconnu

Canada

Used by Mapping Branch of federal department of Energy, Mines and Resources.

Fonction

Copies photographically any size material without intermediate negative. Reduces and enlarges.

Technique

Example of a photographic system once commonly used for copying documents. Main unit consists of the camera, which contains a roll of photosensitive paper, a built-in paper cutter, and trays containing fluids for developing and fixing the exposed image. A darkroom is not required. The resulting copy, or "photostat" is a negative image. The operator makes positives by copying this negative. Although focus and exposure settings are simplified, Photostat machines do require a trained operator. For this reason, and because the copying process is slow and the chemicals and paper expensive, Photostat machines were rendered obsolete by the perfection of dry process, electrostatic copiers like the Xerox.

Notes sur la région

Inconnu

Détails

Marques

.01: Photostat focusing chart reads: "CORRESPONDING/ DIMENSIONS OF/ PRINT TO BE/ MADE ON/ THE PHOTOSTAT/ [Scale based on size of the subject - diagram of chart]/ DIRECTIONS - LOCATE THE/ SELECTED DIMENSION OF THE/ SUBJECT TO BE COPIED ON THE CHART/ AT "SIZE OF SUBJECT" FROM THIS NUMBER/ FOLLOW TO THE RIGHT THE HORIZONTAL/ LINE TO ITS INTERSECTION WITH THE VERTICAL/ COLUMN HEADED BY THE NUMBER IN INCHES/ WHICH IS THE DESIRED CORRESPONDING DIMENSION/ OF THE PRINT. THE NUMBER AT THE INTERSECTION/ SHOWS THE PROPER PERCENTAGE SETTING ON THE/ FOCUSING SCALES OF THE PHOTOSTAT./ EXAMPLE - SUBJECT 28 INCHES LONG TO BE REDUCED/ TO 21 INCHES. FOLLOW LINE FROM 28 TO RIGHT TO INTERSECTION/ OF VERTICAL COLUMN HEADED 21, AND 75 IS THE SCALE SETTING/ FOR BOTH HORIZONTAL AND VERTICAL SCALES./ PHOTOSTAT/ REG. U.S. PAT. OFF./ FOCUSING CHART" Instructions plate reads: "INSTRUCTIONS/ NEVER ALLOW CHEMICALS TO STAND IN TRAYS OVER/ NIGHT. WHEN THRU DAY'S WORK, RINSE BOTH TRAYS/ WITH FRESH WATER./ USE HOT WATER FOR DEVELOPING TRAY IF AVAILABLE./ NEVER PUT HOT WATER IN HYPO TRAY./ WHEN NOT IN USE, CLOSE MAGAZINE, CLOSE BELLOWS/ TURN CURTAIN DOWN, RELEASE TENSION ROLLER./ WATER WILL REMOVE FRESH CHEMICAL STAINS. KEEP/ APPARATUS CLEAN." Manufacturer's plate reads: "NO.4 [number stamped in]/ PHOTOSTAT/ REG. U.S. PAT. OFF./ DESIGN 4088A1807 [number stamped in]/ MANUFACTURED BY/ PHOTOSTAT CORPORATION/ ROCHESTER, N.Y., U.S.A./ UNDER ONE OR MORE OF THE FOLLOWING UNITED STATES PATENTS/ 1793837/ 1802194/ 1811779/ 1818461/ 1818462/ 1824281/ 1834897/ 2065939/ 2109373/ 2124134/ 2142853/ 2236712"

Manque

Lens From CA of 03/15/2002 by David Daley: No - Complete

Fini

Walnut wood grain finish.

Décoration

S/O