New attachment for welder's mask patented

• Book ID: 103081204
• Publisher: Elsevier Science
• Year: 1953
• Tongue: English
• Weight: 65 KB
• Volume: 256
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/0016-0032(53)90649-8

✦ Synopsis

J. F. I. dyestuffs, biological materials, pharmaceuticals, and inorganic chemicals. Tests on an iron arc spectrum showed, under high magnification, clearly defined resolution of the fourth component in the 3100 group. This resolution of the "iron triplet" is regarded by spectrographers as a critical test in determining instrument quality.

Weighing only 150 pounds, the instrument is 12 inches high, 18 inches wide, and 60 inches long. The spectrograph's compact size and freedom from moving parts and adjustments were designed to meet the problems of small firms and institutions and the needs of inexperienced spectrographers.

The instrument will also serve a valuable function as an "extra" spectrograph in the laboratory. It can handle efficiently one-time analyses and eliminate the necessity for breaking down set-ups on larger instruments.

In both new models, the optical system consists of a concave 40 × 80 mm. Bausch & Lomb Certified-Precision grating, slit, quartz cylindrical lens, and film. The combination of cylindrical lens and concave grating provides a stigmatic spectrogram and permits the use of accessory equipment at the slit.