BLAST LAMP
from
BUNSEN BURNER*
ROSS A. BAKER College of the City of New York
I
N AN effort to provide glass- as follows. (1) A a/l6" hole is drilled from A to within blowing facilities for large num- '/r" of E, and a '/~a" hole to this point from E. (2) bers of students a t slight ex- The outside diameter from E to D is then turned down pense, an appliance has been de- approximately I/,' with a stream-line tip a t E. (3) vised to convert an ordinary Bunsen A '/8", 0.27 u.S.F. thread is cut from D to B (length, burner into a blast lamp. approximately 11/8"); this comparatively long thread This appliance consists essentially permits convenient adjustment of the air tip. (4) of a blast iead which slips over A regulation hose tip is turned on the portion B-A, the top of the conventional burner. with outside diameter of I/," a t A . The head carries within i t a tube The locknut, B-C, is made by cutting a narrow collar hrough which air or oxygen may be supplied from any from a piece of threaded tubing. onvenient source, varying from a pump to a rubber alloon. It is most readily constructed of glass, but letal is recommended for durability. In the latter case :is advisable f k t to cast a slug of brass or aluminum f approximately the shape shown in the cut and aving over-all dimensions as follows: length, C-E, diameter a t C, la/le"; diameter a t G, 9/V". A '#!nVhole is drilled in the slug from C to within bout '/s" of E, and a '/aVhole is d r i e d to this point hrough the end a t E, thus producing a restricted gas utlet. A '/16" hole is drilled from G to F (a distance of bout "/~a"), and a a//s" hole from this point to the lteterior of the tube. The resulting shoulder seats the lnnsen burner top. A Vls.0.27 U.S.F. thread is then u t inside from C to D. If the original metal slug be threaded from D to E, The air tube is adapted from a piece of "/16" rod ~ t the h gas at C, the resulting appliance can be is then *Presented before the Division of chemical ~ d of used ~ for blowpipe ~ ~ analysis, ~ since i the flame ~ ~ le A. C. S. a t the Chicago meeting. September 12, 1933. directed downward.
