Court of Appeals for the D.C. Circuit December 13, 1909, No. 602 (Engel v. Sinclair)

Mr. Justice Robb

delivered the opinion of the Court:

The object of the invention, as stated in the Sinclair specification, is “to improve the construction of water tube boilers of the type having upper and lower cylindrical drums connected *215together by rows of straight water tubes, so that whilst the tubes can be readily assembled or removed for renewal or repair, without headroom in the