US632661A

US632661A - Knob attachment.

Info

Publication number: US632661A
Authority: US
Inventors: Oscar Stoddard
Original assignee: SCREWLESS DOOR KNOB Co
Current assignee: SCREWLESS DOOR KNOB Co
Priority date: 1896-11-23
Filing date: 1896-11-23
Publication date: 1899-09-05
Anticipated expiration: 1916-09-05

Description

No. 632,66I. Patented s t. 5, I899. 0. STODDARD.

KNOB ATTACHMENT.

(Application filed Nov. 23, 1896. Renewed Janwlii, 1899.)

(No Model.)

ELT

IVZIWESSES VVEWTOfi UN TED STATES OSCAR STODDARD, OF DETROIT, MICHIGAN, ASSIGNOR TO THE SOREXVLESS DOOR KNOB COMPANY, OF SAME PLACE.

KNOB ATTACHM ENT.

SPECIFICATION forming part of Letters Patent No. 632,661, dated September 5, 1899. A li tion fil d November 28, 1896. Renewed January 13, 1899. Serial No. 702,023. (No model.)

To (alt whom it puny concern.-

Be it known that I, OSCAR STODDARD, a citizen of the United States, residing at Detroit, in the county of Wayne, State of Michigan,

5 have invented certain new and useful Improvements in Door-Knob Attachments; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which I it appertains to make and use the same, referonce being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

I This invention relates to door-knobs, and

especially to the manner of attaching the removable knob to the knob-spindle; and it consists in the construction and arrangement of parts hereinafter fully set forth, and

pointed out particularly in the claims.

The object of the invention is to provide a simple and effective means for securing the.

removable knob to the knob-spindle without the use of screws or bolts and in which the arrangement is such as to provide for the accommodation of doors ofvarious thicknesses, to provide for automatically locking the re movable knob when properly adjusted to prevent said knob from becoming loose or acci- 3o dentally disengaged, and to enable the ready removal of said knob when desired. This object is attained by the mechanism illustrated in the accompanying drawings, in which 3 5 Figure 1 is a plan view showing the application of my invention, the door appearing in horizontal section. Fig. 2 is a vertical section through the door, rose-plate, and a portion of the knob-stem, the locking-dog and theknob-spindleappearingin elevation. Fig. 3 is an enlarged perspective of the lockingdog. Fig. 4: is an enlarged detail of the threaded boss upon which the rose-plate is mounted and which embraces the knob-stein,

showing the way therein which permits the locking-dog to be raised free from the notches in the knob-spindle.

Referring to the letters of reference, A designates the door; 13 and O, the knobs, of

which 0 is removable.

D designates the knob-spindle, which is made fast to knob B and is angular in crosssection, so as to enter a corresponding socket in the stern E'of the knob C, and is provided in one of its faces near its free end witha scries of ratchet-teeth a, which are provided with one inclined and one vertical face. Formed integral with the inner" end of the stem E of the knob O are two projecting fingers 1), (clearly shown in Fig. 1,) between the outer ends of which is pivoted, as at c, a gravity-pawl or locking-dog F, which is provided at its opposite end with a depending point e, which is adapted to engage the teeth a of the knob-spindle.

On referring to Figs. 2 and 3 it will be seen that there is an inclined slot 01 formed in the end of the dog F, through which the pivotal pin 0 passes, the purpose of which is to prevent the raising of the engaging end of said dog and the accidental disengagement thereof from the teeth of the knob-spindle. It will be seen that the locking-dog when in position lies parallel with and contiguous to the teeth of the knob-spindle when the end of said spindle is inserted in the shank E of the knob C. It will also be seen that as the knobspindle is inserted in said shank the point e of the dog will ride over the teeth a, of the spindle, which action tends to move the dog outward, so that its pivotal pin 0 will lie in the lower end of the slot 01 therein, so that the engaging end of the dog is free to ride over the teeth of the spindle as it is entered in said socket. The spindle D enters the socket in the knob-stem E until the parts are in proper position, when the point e of the dog engages one of the teeth a on said spindle and locks the knob C thereon. Were the dog F pivoted in the ordinary manner a sud- 9o den or unusual outward strain upon the knob 0 might cause said dog to disengage itself from the ratchet-teeth of the knob-spindle, permitting the knob O to be Withdrawn. To obviate this I employ the inclined slot 01 in '9 5 said dog,through which the pivot-pin 0 passes, by which means any outward strain upon either knob causes said dog to be drawn slightly inward and the pin 0 to ride up the incline of the slot (Z, whereby the dogF is not .a thereof, but its point of fulcrum is moved so far toward the center of said dog that the engaging end thereof cannot possibly rise sufiiciently to disengage itself from the teeth of said spindle, thereby firmly locking the knob O thereto.

G designates a plate which issecured to the face of the door and which is provided with an externally-threaded boss f, in which the knob-stem E is adapted to turn and upon which is screwed the rose plate H. The inner wall of the boss f stands adjacent to the upper edge of the dog F and is provided with a notch g therein, which permits of the outer end of said dog being raised to disengage it from the ratchet-teeth of the knobstem when it is desired to remove the knob. Said dog is raised by the insertion of the end of an awl or other pointed instrument in the aperture 2' in the end thereof and the turning of the knob-stein E until said dog shall register with the notch or way g cut in the inner wall of the boss f, when said dog may he lifted out of engagement with the ratchet-teeth of the knob-spindle and the knob O freely withdrawn. To afford access to the dog F, so as to disengage it, the rose-plate H is first unscrewed from the boss f and moved outward on the knob-stem E, when the outer end of said dog is accessible.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the knobs, the spindle fixed to one of said knobs and having ratchet-teeth on the opposite end thereof, the dog pivoted to the knob-stem and engaging the ratchet-teeth of the knob-spindle, said dog having an inclined slot therein through which its pivot-pin passes.

2. The combination of the knobs, the spindle attached to one of said knobs and having ratchet-teeth at its opposite end, one of said knobs being detachable from said spindle andhaving a hollow knob-stem which receives the end thereof, the dog pivoted to the knobstem of the removable knob and engaging the ratchet-teeth of the knob-spindle, the collar or boss embracing said knob-stem and dog and havinga notch or way thereininto which the free end of said dog may be moved.

In testimony whereof I aflix my signature in presence of two witnesses.

OSCAR STODDARD.-

Witnesses:

WM. 0. MoOUNIe, EDGAR S. WHEELER.