Hawley Furnace Co. of New England v. Braintree & W. St. Ry. Co.

COLT, Circuit Judge.

This suit relates to letters patent No. 447,-179, dated February 24, 1891, granted to Melville C. Hawley, for “a new and useful improvement in furnaces.” The specification says:

“This improvement relates to downward-draft furnaces, and more especially, but not exclusively, for boiler furnaces. Its object is to insure a sufficient downward draft through the upper grate, and at the same time a thorough and economical consumption of the fuel. The leading feature of the *222improvement is the combination of a lower upward-burning grate with an upper downward-burning grate, the bars…