Page:Popular Science Monthly Volume 88.djvu/790

 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

��� �