ROBB, Associate Justice.
Appeal from a decision of the Patent Office, refusing the claims, 15 in number, of an application for patent. There is needless multiplication of claims. Claims 1, 2, 5, and 7 fully cover the device, and of those we here reproduce claim 5:
"5. A safety construction for elevating mechanism consisting of a member adapted to be moved against opposition; a nut secured to said member and formed to present to view a transverse section of...
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