MENT FOR LEAD BURNING (WELDING)

Plate Burning Rack

The plates which compose a "group" are joined to the plate connecting
strap to which the post is attached. The plates are "burned" to the
strap, and this must be done in such a manner that the plates are
absolutely parallel, that the distance between plates is correct, and
that the top surface of the strap is at right angles to the surface of
the plates. These conditions are necessary in order that the positive
and negative groups may mesh properly, that the complete element,
consisting of the plates and separators may fit in the jar properly,
and that the cell covers may fit over the posts easily.

[Fig. 96]

Fig. 96. Universal Plate Burning Rack. Will Hold Three Groups of
Plates at One Time. Designed for Standard and Special Plates

In order to secure these conditions, plates that are to be burned to
the strap are set in a "burning rack," shown in Figs. 96 and 97, which
consists mainly of a base upon which the plate rest, and a slotted bar
into which the lugs on the plates fit. The distance between successive
slots is equal to the correct distance between the plates of the
group. An improved form of burning rack has a wooden base which has
slots along the side. The plates are set into these slots and are thus
held in the correct position at both top and bottom.

[Fig. 97 Plate burning rack for standard 1/8 inch, and thin plates]

Fig. 97 shows a rack for use with 1/8 inch and 7-64 inch plates. Fig.
96 shows a "Universal" rack which may be used with both the 1/8 and
7-64 inch plates, and also many special plates.

The guide-bar, or "comb," E, has slots along two sides, the base
having corresponding slots, as shown. To accommodate different sized
plates, the comb may be raised or lowered, and the uprights may be
moved back and forth in two slots, one of which is shown at F. In
using this rack, the plates are set in position, with their lower
edges in the slots of the base, and their lugs in the slots in the
comb. The plates are in this way held at opposite corners, and are
absolutely straight and parallel.

Special fittings are provided to simplify the work of burning. A bar,
D, fits along the edge of the comb, and holds the lugs of the plates
firmly in the slots. This bar is movable to any part of the comb,
being held by two spring clips, C. Two bars, A and B, which are
adjustable, make a form around the plate lugs which will prevent the
hot