Page:Popular Science Monthly Volume 89.djvu/491

This page needs to be proofread.

Poptilar Science Monthly


��How to Drill Holes Quickly in Wood

WHEN drilling holes in wood to a predetermined depth, a metal fiber or other tube of the correct length, placed over the bit as shown in drawing, will make it possible to do this part of the


���A Tube of Metal Fiber Placed Over the Bit Accelerates the Job

work with a great deal more speed and accuracy than is usually attained by ama- teurs at the work. — Walter Franseen.


��ber button and a both difficulties. The bolt should

��A Screen Door- Check

LTHOUGH a screen door is a summer necessity, it is also a frequent source of annoy- ance because of its tendency to slam. A pneumatic door- check overcomes the slamming but allows the door to remain open long enough to admit flies. The door- check described, consisting of a rub-

��A Rubber Button

and Small Bolt Are


��small bolt, obviates

have a head about ^ in. in diameter, and a shank about 3 ins. long and >4 in. in diameter. It is screwed or driven into the inner face of the door near enough to the outsidc edge to clear the jamb when the door is closed .

The button is a boat-shaped piece of rubf)er a trifle longer than the bolt. It is attached to the jamb by a screw J4 of the way from the top of the button. It swings loosely on this screw and hangs by its own weight, as in the illustration, where the door is pictured ajar showing clearly the mechanism.

When the door closes, the projecting head of the bolt, B, comes first in contact with A, the upper end of the button. As the head of the bolt passes, it swings the button out [as indicated by dotted

��line. The lower end of the button, C, thus comes in contact with the face of the door before the door touches the jamb.

The blow is consequently checked by the rubber and the door closes quickly and without noise. The button drops back into place again ready for the next comer. — 1£. P. Thorntox.

Cooling a Ship's Laundry

ASH IP'S laundry is a hot place — not the only one, of course, and not the most confining one. Besides there are ways of making this one consider- ably more comfortable.

Some of the resourceful sailors on board the U. S. S. Maryland who objected to this particular hot place got relief as follows: Several sheets of galvanized iron were cut and bent as shown in the drawing. Two small straps were made to go with each sheet. Holes were punched for small stove bolts, and the fans were attached to the' over- head shafting, as shown.

This scheme for improvising fans when shafting is in operation, could be used in many other situations. The bolts should clamp the shaft tightly to prevent slipping. — A. and P. Thompson.

���She et metal fans

— '- — »tC^J^



��-iii-im. 'ftp--.

�� ��Improvised Electric Fan at Rest and in Operation

�� �