US 312485 A
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(No Model.) J MA'KIN COMBINED LEAD AND IRON PLTE. No. 312,485.- Patented Feb. 17, 1885.
UNITED STATES PATENT OErIcE.
JOHN MAKIN, OF GLOSSOP, COUNTY OF DERBY, ENGLAND.
COMBINED LEAD AND IRON PLATE.
SPECIFICATION forming part of Letters Patent No. 312,485, dated February 17, 1885.
Application filed November E0, 1884. (No model.)
T0 @ZZ whom it mfc/,y concern:
Be it known that I, JOHN MAKIN, a subject of the Queen of Great Britain, and residing at Glossep, in the county of Derby, England, have invented an Improvement in Coating Iron, Steel, or other Metal with Lead, of which the following is a specication.
This invention relates to the coating of iron, steel, or other metals with lead, and is applicable to a variety of useful p urposes-such, for instance, as the coating with lead of the vessels used for boiling wood fiber with acid solu tions in the manufacture of paper, coating the interior of cast-iron pipes with lead, so as to resist the action of acids, and numerous other uses where it is desirable to apply a thiok coat ing of lead (by casting in a molten state) to one or both surfaces of iron, steel, or other metal.
The object of the invention is to cause the lead to adhere closely to the iron or other metal, and to prevent it from becoming loosened, as frequently happens when such lined vessels are exposed to heat, in consequence of the unequal expansion and contraction of the iron or steel and the lead.
Such being the nature and object of my said invention, I will now proceed to describe in detail the manner in which the same is to be or may be performed or carried into practical effect; and in order that the saine may be clearly understood I have annexed hereunto a sheet of drawings illustrative thereof, and have marked the same with figures and letters of reference corresponding with those in the following explanation thereof.
Figure l is a plan view of the perforated plate. Fig. 2 is a section of the same. Fig. 3 is a section of the plate coated on both sides. Fig. Lishows a like section ofthe plate coated on one side only.
The invention consists, principally, in perforating the iron or other metal all over with a number of holes, say from one-quarter of an inch to three inches asunder, more or less, y (see plan View, Fig. l, and section, Fig. 2,) da being the plate and b b the holes, and then to place the same in a mold and apply the coating of lead in a molten stat-e, by which means Patented in Canada November E19, 1834, No. 20,667.
the coating of lead c c is formed on both sides of the iron or other metal, as shown at Fig. 3, and the two coatings are united together through the perforations at intervals all over the surface. The consequence of this is that the lead adheres closely to the iron or other metal, and if any unequal expansion takes place the effect is minimized and localized, and the lead coating cannot leave the surface ofthe iron or other metal, being bound through from side to side by leaden studs or pins at each perforation. If the surface of the iron or other metal is galvanized before the lead is cast on, the latter adheres still more closely.
In cases where it is only desired to coat one side of the iron or other metal with lead I taper or eountersink the holes on the reverse side, so that when the molten lead is run on it flows through the perforations, formino, as it were, leaden rivets to hold the lead-coating in its place, as shown in section at Fig. 4.
I claim as my inventionl. Coating iron, steel, or other metal with lead by first drilling, punching, or otherwise forming holes or perforations through the metal to be coated, then placing such perforated plates in a suitable mold and running in the molten lead, so as to coat one or both sides, as may be required, and at the same time ll in the perforations, so that the lead is firmly united to the iron, steel, or other metal by the plugs of lead which fill the perforations, and thus the necessity for bolts, rivets, or other extraneous means of fastening is dispensed with.
2. As a new manufacture, sheets or plates of perforated iron, steel, or other metal coated on one or both sides with molten lead, filling the said perforations, substantially in the manner and for the purposes hereinbeforc described.
In testimony whereof I have signed my name to this specification in thepresenee of two subscribing witnesses.
JOHN llI AKIN.
"Wi tn esses:
CHnnLEs DAvrEs, JNO. HUGHES.