June, 1903.1 MacGillivray : Winding Elkow-pins. 101 



turns are made around the central steel pin, two, three or more as the 

 operator may desire, care being taken to see that the coils of the pin 

 are close together and fit tight to the central steel pin, Fig. 2. If the 

 pin is not kept at the bottom of the peripheral hole when it is bent 

 out at right angles, it is (juite likely to draw out of the hole while the 

 winding is being done. When the coil is completed, Fig. 3, it is 

 removed from the central steel pin and the head and the portion of 

 the pin between it and the coil is cut off close up to the coil with a 

 pair of shears or with a pair of wire side cutters. The coils are now 

 placed on the pins and shoved through one of the holes in the steel 

 plate, Fig. 4, which places them on the pin firmly and raises them all 

 to the same height. Now all that needs to be done is to turn the 

 apical third of the pin up at right angles and the operation is com- 

 pleted, Fig. 5. 



The tool used in placing the coils on the pins is a steel plate with 

 a number of holes bored through it and fastened over a hole in a 

 wooden block, the thickness of the block depending on the height 

 at which it is desired to place the coils. The size of the holes should 

 be slightly larger than the diameter of a No. 5 Klager insect pin. 



In my own experience I have found that the black Schliiter pins, 

 No. 00, make the best elbows. The points are very fine and the pins 

 are springy, causing them to hold firmly to the upright pin. If Schlii- 

 ter pins one and five eighth inches in length are used, the peripheral 

 holes should be deeper, otherwise the elbows will be too long. The 

 ideal calibered pin to carry the elbows would be one of the size of a 

 No. 3 Klager, but I have found it impossible to find anything strong 

 enough of this size to serve as the central steel pin and so have 

 adopted the No. 5 Klager as the size on which to places the elbows. 



Where it is desired to make the elbows in quantity it will be found 

 a great saving of time to do one thing at a time, that is, wind a num- 

 ber of the coils, then cut off the heads, shove them on the carrying 

 pins, and finally bend them. If the tool is properly constructed, but 

 little mechanical skill is required. I have frequently taught students 

 in ten minutes so that they could make as perfect elbows and coils as 

 one who had had considerable experience. 



