J. Zentmayer, Philadelphia. Patented 1876, No. 3773

United States Army Hospital Binocular Microscope

J. Zentmayer, Philadelphia. Patented 1876, No. 3773. United States Army Hospital Binocular Microscope stage
J. Zentmayer, Philadelphia. Patented 1876, No. 3773. United States Army Hospital Binocular Microscope swinging substage
microscope in the case
accessories

The following was extracted from the 1895 Zentmayer catalog:

United States Army Hospital Microscope, New Model

STAND II

UNITED STATES ARMY HOSPITAL STAND. NEW MODEL

This Stand was originally designed and constructed for the United States Army Medical Department in 1862, but has recently been reconstructed. The entire Stand is of the best finished brass and sixteen inches high when arranged for use. The coarse and fine adjustments are like the American Centennial Stand. The bar is supported by a pillar, with joint for inclination to any angle between the perpendicular and horizontal positions.

The sub-stage for accessories and mirrors swing in the same manner as in the American Centennial Stand. The sub-stage has a cylindrical receiver and centering movements by means of a set-screw with a capstan head. The concave mirror, when swung over the stage for illuminating opaque objects, is a handy and efficient substitute for a bull's-eye condenser. A graduated circle is provided for registering the degree of obliquity, and a stop to indelicate central position. The sub-stage has moveable rack and permanent pinion adjustment, and the rnirror has a lengthening bar.

The stage is similar to that of the American Centennial Stand, makes a complete revolution, and is centered by means of set-screws.

If desired, a rotating mechanical stage can be had, in which the l:ongitudinal movements are accomplished by rack and pinion and the latitudinal by a screw. It is provided with set-screws for centering it accurately to the optical axis, and cost $30 extra.

5. New Model United States Army Hospital Stand, Binocular; four Oculars ; 8/10-inch Objective, 0.28 N. A. 1/6-inch Objective, 0.71 N. A.; Mahogany case ....$153.00

6. New Model United States Army Hospital Stand, Monocular; two Oculars; same Objectives as No. 5; Mahogany case ... $123.00

7. New Model United States Army Hospital Stand, Binocular, with four Oculars and Mahogany Case,  ..... $120.00

8. New Model United States Army Hospital Stand, Monocular, with two Oculars and Mahogany Case, ..... $90.00

Additional examples of the United States Army Hospital Microscope

Zentmayer 1876 patent
Zentmayer 1876 patent

The Zentmayer 1876 patent describes the fine adjustment mechanism and the new swinging sub-stage.

Biographical Sketch of Joseph Zentmayer

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