US451503A - William lockhart morton - Google Patents

Description

(No Model.)

W. L. MORTON.

KNOB ATTACHMENT.

No. 451,503. Patented May 5, 1891.

JQura 5.

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UNITED STATES PATENT OEEIcE.

WILLIAM LOCKHART MORTON, OF SOUTH YARRA, NEAR MELBOURNE,

VICTORIA.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 451,503, dated May 5, 1891.

Application filed September 10,1890. Serial No. 364,585. (No model.)

To It whom it may concern.-

Be it known that- I, WILLIAM LOOKII RT MORTON, of South Yarra, near the city of Melbourne, in the county of Bourke and Colony of Victoria, have invented certain new and useful Improvements in Door-Knob Attachments; and I do hereby declare that the following is a full, clear, and exact description of the-invention, that will enable others skilledin the art to which it appertains to make and use the same.

The object of my invention is to provide a simple and permanently effective door-knob attachment by means of certain new and useful improvements in the construction of the knob and spindle. In some other inventions washers are required, in order that the knob may be readily adjustable to suit doors of different thickness; but in this invention this Object is effected without washers.

My invention, to these ends, consistsin the combination of parts hereinafter set forth and claimed.

Referring to the accompanying drawings, which illustrate my invention and form a part of this specification, Figure 1 shows a' View, partly in longitudinal central section, ofa door knob and spindle secured together. Fig. 2 shows an elevation of the outer face or head of the knob. Figs. 3 and a show sectional views of alternative forms of flanged nuts as secured to the spindle.

Referring to Fig. 1, a shows the knob; b, the spindle; c, a socket-nut; g, the door; f, the rose.

In this invention I provide a square spindle having at its end a cylindrical portion of reduced diameter. The cylindrical portion of reduced diameter is threaded with a lefthand male screw-thread, (shown by e in drawings,) and the adjoining square portion of the spindle of full diameter is threaded at its corners with a right-hand male screw-thread. (Shown by d in drawings.) Then the spindle has been passed through the door, both the threaded parts are projecting more or less, according to the thickness of the door, the case shown in Fig. 1 being that of a thin door. The knob-shank is internally threaded with a right-hand thread (shown by a in Fig. 1) to screw onto the the thread cl of the spindle until the knob meets the rose. The object of reducing the diameter of the spindle at e is to enable it to pass through the knob-shank. The head of the knob has an aperture with countersunk or beveled edges, and through this aperture I pass a socket-nut c, with a screw-driver head having a left-handed female thread 0 on drawings, which I screw onto the end of the spindle until the head of the socket-nut is screwed tight home to the knob, thus closing the aperture therein. It is now impossible for the knob to work itself loose or become shaky on the spindle by the wear and tear of constant use. It is not necessary to make the male thread at (Z righthanded and that at e left-handed with corresponding female threads on the knob-shank and socket-nut, respectively, as the thread at (1 may be left-handed and that at 3 righthanded, so long as one is the reverse of the other, to insure that any tendency of the knob to screw off will be checked by the refusal of the socket-nut to screw in the same direction, so that the head of the socket-nut always holds the knob securely.

Instead of having a screw-driver head, the head of the socket-nut may be square or polygon a1 and be turned by a spanner, and may project from the knob-face, instead of having its edges flush with it, these forms being severally indicated in the drawings.

' That I claim is- The combination, with a knob having an internally-threaded shank and an aperture in the exterior face, of a square spindle screwthreaded to receive the shank of the knob and havingits extremity of reduced diameter, with a screw-thread thereon cut in the reverse direction to the thread which receives the knob-shank, and a socket nut internally threaded to screw onto the extremity of the spindle and having a flanged head to close and cover the aperture in the knob, substantially as and for the purposes specified.

In witness whereof I have hereunto set my hand in presence of two witnesses.

\VILLIAM LOCKIIART MORTON.

Witnesses:

G. G. TURRI, A. H. PRICE.

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