Design for a chair-spindle
US D24855 S
Description (OCR text may contain errors)
0. O. TRAPP.
No. 24,855. Patented Nov. 5, 1895.
UNITED STATES PATENT OFFICE.
('Altlllth 'IRAPI, OF PURT \VASlllNG'lON, \VISCONSIN, ASSIHNUR 'lU HARRY \V. 'BOLENS, ()l SAME PLAUE.
DESIGN FOR A CHAIR-SPINDLE.
SPECIFICATION formingpart of Design No. 24,855, dated November 5, 1895. Application filed September 27, 1895. Serial No. 563,909. Term of patent 14 years.
To all whom it may concern.-
Be it known that I, CABLES t. TRAPP, a citizen of the United States, residing at Port \Vashington, in the county of Ozaukee and State of Wisconsin, have invented and produced a new and original Design for Revolving hair-Spimlles; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanyingdrawingsforming a part thereof, in which Figure 1 represents a front elevation of a revolving chair-spindle embodying my new design. Fig. 2 is a bottom plan view thereof. Fig. 3 is an elevation of the lower part of the spindle turned one-quarter round from the position shown in Fig. 1.
My design relates to the new and original external shape or configuration of. the article.
The leading features of this design for a revolving chair-spindle comprise a generally cylindrical body having a smooth external surface at its upper end and a spirally-beveled surface at its lower end terminating in a substantially flat or horizontal base, and between the upper and lower ends the cylindrical body is of a continuous spirally-threaded configuration, the said threads having flat outer faces and the diameter of the spindle at the exterior of said threaded part being greater than the diameter of the upper unthreaded part. One face of the said threaded portion of the spindle is provided with a longitudinal straight-Walled groove, beginning somewhat above the central line of the said body and contin uin g down 1 o the base thereof.
A represents the upper unthreadcd end of the spindle, and. (t the substantially flat or horizontal top thereof.
B represents the described shape of the spirally-beveled surface at the lower end of the spindle, and I) the substantially flat or horizontal base.
0 designates the continuous spiral screwthreaded external surface of the spindle, and l) the described groove vhich latter is deeper than the continuous spiral depression (Z between the continuous spiral thread C, and E represents the shape of a continuation of one straight wall of said groove D, which extends down through the described spirally-beveled lower end of the said spindle.
As a minor feature of said design, the described spiral screw-thread is beveled and converges toward the spiral depression (Z at each side of its flat outer surface, as Shown at c c, and this peculiar configuration is shown at the point marked e of the lower part of the wall E of the described groove I).
hat I claim is The design for a revolving chair spindle substantially as shown and described.
In testimony whereof I aifix my signature in presence of two witnesses.
WM. AHLHAUSER, HARRY W. BoLENs.