VOLUME
2 3,
NO.
9,
SEPTEMBER
1951
29 A
Speedy, Accurate Weighings • Improved Operation • Prolonged Sensitivity with the new
mm
•
CHRISTIAN BECKER Projectomatic Analytical Balance ' Jj||"
The newly designed Projectomatic balance makes possible automatic weighings from 1/10 mg to 100 mg, the results of which may be read on the magnified image of the scale which is projected onto a conveniently located screen. In addition to the unique projection device, this balance features a new "floating" neoprene-cushioned black glass base plate to which no mechanism is mounted. With this arrangement breakage hazards are minimized, and a sturdy more rigid construction is achieved.
The model AB-1 is a double pan balance. Accordingly on a balance of this type it is possible to tare containers. Since it is recognized that in many weighing operations taring is an absolute necessity, a balance of the AB-1 type is desirable for most installations. In addition, this type of balance, although adapted for repetitive weighing, is ideal for routine laboratory work. H-1843—Christian Becker Projectomatic Analytical Balance Each $ 7 9 5 . 0 0
Specifications C a p a c i t y — 2 0 0 grams.
Beam—18.1 cm, of a special alloyed aluminum of great strength and uniform density. T h e beam is graduated left to right, 0 to 1 gram in 0.1 gram graduations (no weights below 1 gram required). Projection System — the new Projectomatic makes possible automatic weighings from 1/10 mg to 100 mg. A vernier is provided for direct and positive reading to 0.1 mg. T h e zero of the screen is readily adjustable from outside the case. Knife Edges—Agate. All knife edges are rigidly set in the beam. Bearings—Agate Planes.
Releasing Mechanism—Beam Arrest. The special construction of the beam arrest insures the positive alignment of the agate edges with their respective bearings. Damper—Magnetic damping arrests the oscillation of the beam almost immediately. Rider Carrier—The enclosed vertical lift insures accurate alignment, in all positions, of lifting hook with the beam.
HARSHAW SCIENTIFIC DIVISION OF THE HARSHAW CHEMICAL CO. CLEVELAND 6, OHIO
Pans—Stainless Steel, 2l{6 in. diameter. Bows—Brass, coated with a hard chemically resistant lacquer. Straight sides to accommodate large drying tubes etc., 4YS in. x 8K in. high. Pan Arrest—The new independent pan arrest for pans with a positive stop. Vibration Dampers —Special built-in dampers at each balance support dampen objectionable outside vibrations. Sash Balance—The newly developed stainless sash balance for raising the front door eliminates the troublesome sash weights. The door opens wider, and more smoothly. Case —1834 in- x 9 in. x 20 in. high. Aluminum with glass top and front panel and a removable back panel. The newly designed sliding front door, which actually comprises a portion of the side of the case, eliminates the objectionable conventional front corner posts. The case exterior is finished in an attractive chemically resistant finish. The interior is white to brighten working area. Case provided with a drawer
