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Publication numberUS55115 A
Publication typeGrant
Publication dateMay 29, 1866
Publication numberUS 55115 A, US 55115A, US-A-55115, US55115 A, US55115A
InventorsThomas Kennedy
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Thomas kennedy
US 55115 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




Specification forming part of Letters Patent No. 55,115, dated May 29, 1866 antedated May 20, 1866.

To all whom it 'may concern:

Be it known that I, THOMAS KENNEDY, of Branford, in the county of New Haven and State of Connecticut, have invented a new and useful Improvementin Extension Door-Knobs; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the saine, and which said drawings con stitute part of this specitication, and represent, in-

Figure l, a side view; Fig. 2, a longitudinal central section cutting through X Y, Fig. 1; Fig. 3, the knob, and in Fig. 4 the rose detached.

My invention relates to an improvement in the connection of doorknobs, whereby they may be adj usted so as to be placed at a greater or less distance apart, according` to the thickness of the door.

To enable others skilled in the art to construct and use inyimprovement, I will proceed to fully describe the same as illustrated in the accompanying drawings.

A is a knob, secured to a spindle, B, in the usual manner, C, a rose, Ialso of common construction. On the other end ot' the spindle B I cut a screw-thread, cutting only the corners, as seen in Fig. 1.

D is a nut screwed onto the spindle against the door, to prevent the withdrawal of the spindle therefrom.

E is the second knob, attached to the neck F in the usual manner. The said neck is constructed so as to extend through the rose Gr,

V the knob.

The hole in the neck of the knob is made square, so that when placed on the spindle B, as seen in Figs. l and 2, in the usual manner, it cannot turn thereon. The rose Gr is placed upon the neck of the knob, the projections a a on the neck passing through the notches in the rose. The knob is then set upon the spindle in the usual manner, and the rose turned so far round as to cover the projections on the neck and prevent its withdrawal, as seen in Fig. 4, the projection denoted in red. The rose is then secured tothe door in the usual manner, which prevents the removal otl the knob E until the rose is loosened from the door.

If the knob is to be used fora force-lock the Xrose C will not be required, the neck of the knob being constructed accordingly.

Having, therefore, thus fully described my invention, what Iclaim as new and usefuLand desire to secure by Letters Patent, is- The combination ot' the nut D and spindle E with the rose G and neck F, constructed and arranged, with the projections a a and notches c c, substantially in the manner and for the purpose specified.


Witnesses JOHN E. EARLE, C. M. INGERsoLL.

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Cooperative ClassificationE05B3/06