opinion: ROBB, Associate Justice.
  Appeal from a decision of the Patent Office rejecting the claims of an alleged divisional application relating to coalmining machines. The grounds' of the rejection were: First, that the claims are for substantially tbe same invention covered by appellant’s patent No. 1,538,684, of which this application is claimed to be a division; second, that the claims are unpatentable over the prior art; and, third, that they do not adequately define the invention.
  Tho above patent, carrying 141 claims, was issued to appellant on May 19,1925. On the same day there was issued to him patent No. 1,538,685, carrying 81 claims, the application being a division of the original. The drawings of tho present application, filed later, are identical with those of the parent application. An examination of the present application discloses that the alleged invention consists in so arranging the machine that it may be driven by either a single driving chain or by two flexible elements. Tbe claims attempt to eovor broadly all possible arrangements whereby the machine may be converted from one driven by two flexible elements into one driven by a single chain, notwithstanding that appellant has an allowed application covering each of these elements. No mechanism for making the substitution is included. This, therefore, is an attempt through the use of general terms to cover any means that may be discovered of producing tbe result accomplished through tbe original patent. But this may not be done. Miller v. Eagle Mfg. Co., 151 U. S. 199, 14 S. Ct. 310, 38 L. Ed. 121; Heidbrink v. McKesson (C. C. A.) 290 F. 665.
  For tbe reasons more fully stated by tho tribunals of the Patent Office, tbe decision is affirmed.
  Affirmed.
instruction: What follows is an opinion from a United States Court of Appeals. You will be asked a question pertaining to issues that may appear in civil law issues involving government actors. The issue is: "Did the court conclude that it should defer to agency discretion? For example, if the action was committed to agency discretion. Answer the question based on the directionality of the appeals court decision. If the court discussed the issue in its opinion and answered the related question in the affirmative, answer "Yes". If the issue was discussed and the opinion answered the question negatively, answer "No". If the opinion considered the question but gave a mixed answer, supporting the respondent in part and supporting the appellant in part, answer "Mixed answer". If the opinion does not discuss the issue, or notes that a particular issue was raised by one of the litigants but the court dismissed the issue as frivolous or trivial or not worthy of discussion for some other reason, answer "Issue not discussed". If the opinion considered the question but gave a "mixed" answer, supporting the respondent in part and supporting the appellant in part (or if two issues treated separately by the court both fell within the area covered by one question and the court answered one question affirmatively and one negatively), answer "Mixed answer". If the opinion either did not consider or discuss the issue at all or if the opinion indicates that this issue was not worthy of consideration by the court of appeals even though it was discussed by the lower court or was raised in one of the briefs, answer "Issue not discussed".