CENTRAL SCIENTIFIC CO., CHICAGO. TJ. 8. A. 



149 



No. 2940. No. F157. No. F213. No. F211. 



No. F153 (in use). 



CLAMPS, GENERAL LABORATORY 



The clamps listed in this section differ from the usual chemical laboratory clamps in that they are 

 carefully machined to secure perfect alignment of apparatus with which they are used. All V's are 

 accurately milled, holes are carefully reamed and faces are smoothly planed. They should be selected 

 whenever it is essential to have apparatus assembled with an accurate arrangement of parts. 

 2930. CLAMPS, Adjustable, steel. These clamps are so constructed that they can be quickly adjusted 

 and will lock themselves the moment the pressure is applied to the screw. The bar is 3% inches 

 from the center of screw. A very desirable clamp for light or medium work. 



No B C 



Maximum opening, inches 6 10 18 



Each $1.10 1.30 L80 



F211. COLLARS, with set screw, allowing a clamped rod to rotate freely, and at the same time prevent- 

 ing motion along the axis. The two smaller sizes are of brass, nickel-plated; the others of 



iron, neatly japanned. No A B C 



For rods' of diameter, mm 10 13 19 30 



Each $0.40 .50 .60 .80 



F213. HOOK COLLARS, with set screw, of substantial construction. The many uses to which such a 

 piece may be put will readily be seen. The two smaller sizes are of brass, nickel-plated and 

 the other of cast iron, neatlv japanned. 



No ." A B C 



For rods of diameter, mm 10 13 19 



Each 60 .70 .80 



F153. CLAMPS, Extension, for holding two rods parallel to each other. (The illustration shows the 

 clamp in use with two rods and an iron table top.) 



No A B C 



For rods of diameter, mm 10 13 19 



Each . .50 .70 1.00 



2940. CLAMPS, Hand Screw, wood, with saw cut threads on screws. 



No A B C D E 



Length of jaws, inches 7 10 12 



Opening, inches 2 3 4V> 5% 



Each 55 .65 .80 1.00 1.25 



F155. CLAMP, Extension, for holding two rods parallel to each other. By using this clamp it is pos- 

 sible to fasten two rods parallel to each other without slipping the clamp over the end of the 

 rods, as was necessary in the old form. For use with rods of from 10 to 19 mm diameter. $0.70 

 F157. CLAMPS, Extension, for holding two rods in line. The lower end is reamed to fit the top of the 

 lower rod and is provided with a set screw; upper end is tapped to receive the upper rod. 



No A B C D 



For lower rod of diameter, mm 13 19 13 19 



For upper rod of diameter, mm 13 19 10 13 



Size of thread of upper rod %-16 V-12 1,4 -20 %-16 



Each .55 .65 .55 .65 



