762 



Popular Science Monthly 



A Pipette Attached to a Bottle 



A 



SMALL pip- 

 ette may be 

 suspended from the 

 cork stopper of a 

 bottle, by means of 

 an ordinary eye- 

 bolt whose diame- 

 ter is slightly larger 

 than the diameter 

 of the dropper. 

 The arrangement 

 is clearly depicted in the illustration. 



If the bottle is shorter than the 

 pipette, a rubber band may be attached 

 to the pipette, forming a flange to en- 

 gage the ring of the eye-bolt. This 

 device is especially useful in hospitals 

 and homes, where sanitary measures 

 should be ol3served. — P. F. Quinn. 



Making Dies of Difficult Outline 



IN making a die 

 for punching out 

 plates of an un- 

 usual outline, such 

 as the one shown 

 in the diagram, the 

 following method 

 may be employed 

 to advantage: 



Lay out the fig- 

 ure carefully, drill 

 the holes C and 

 knock out the plug. 

 Replace the plug 

 and secure it by 

 means of two pins, 

 D, D. Bolt the 

 plug to the face- 

 plate, parallels be- 

 ing placed between the face-plate and 

 die so that the plug can be driven 

 towards the face-plate and dropped out. 

 Locate the point A which is the center of 

 a circle whose circumference coincides 

 with the outline of the end of the figure. 

 The plug should now be removed and the 

 half-circle bored out and clearance 

 given to it. Next, remove the die from 

 the face-plate and replace the plug with 

 the pins. Fasten the plug to the face- 

 plate, locate the point B and bore out 

 the semicircle, as before. Finish the 

 two flat sides between the semicircles 

 with an end mill in a milling machine. 



How to Fit Cables Into Small 

 Terminal Holes 



IN installing an 

 A. C. induction 

 motor, it ^some- 

 times happens that 

 the holes in the 

 terminals on the 

 terminal board are 

 too small to receive 

 the ends of the 

 cable. Instead of 



the common but CLAfiP/NC terminal bo aroi 

 unsatisfactory 



method of cutting strands of wire off 

 the cable to make a fit, the following 

 method is suggested: 



Make some brass thimbles and sweat 

 them on the cable ends, as shown. The 

 thimbles are made from a round brass 

 rod large enough for boring a hole to fit 

 the end of the cable. The other end is 

 turned down to fit the hole in the 

 terminal block. — H. Hunter. 



A Set of Jaws for Counter- Boring 

 and Facing 



THE diagram 

 shows a special 

 set of jaws made 

 for use on the lathe- 

 chuck when coun- 

 terboring and fac- 

 ing the inner ends 

 of castings, such as that shown in the 

 illustration. The jaws being cut away 

 allows plenty of room for facing the ends. 

 The cutter used is a lathe-tool set in the 

 tool-post. — C. Anderson. 



No Corkscrew Needed 



IF manufacturers 

 would loop a 

 piece of strong cord, 

 the length depend- 

 ing upon the size 

 of the stopper, 

 around the cork 

 before inserting it 

 in the neck of the 

 bottle, they would 

 greatly help their patrons. This would 

 do away with corkscreAvs and would 

 save time. — Wm. Ed. Finkernagel. 



SPCOAl jaw 



