Patent 920,105 · Backus's Lock and Check Hook · Page 1
UNITED STATES PATENT OFFICE.
JOHN C. BACKUS, OF SMETHPORT, PENNSYLVANIA, ASSIGNOR TO
BACKUS NOVELTY CO., OF SMETHPORT, PENNSYLVANIA.

LOCK AND CHECK HOOK.
No. 920,105. Specification of Letters Patent. Patented May 4, 1909.
Application filed May 26, 1908. Serial No. 435,052.
To whom it may concern:
    Be it known that I, JOHN C. BACKUS, a citizen of the United States, residing at Smethport, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvements in Lock and Check Hooks, of which the following is a specification.
    This present invention relates to safety hooks for wearing apparel, such as hats and coats which are removed indoors, thereby preventing loss or misplacement of such articles or the carrying off of the same through inadvertence or mistake.
    The invention provides a novel form of hook, lock-bolt coöperating therewith and lock means for securing the lock-bolt when projected, said lock means embodying a key-check for identifying the hook and releasing the lock-bolt and in turn secured when the lock-bolt is retracted or moved away from the hook.
    With these and other objects in view, which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly claimed.
    The invention provides a simple, cheap and effective construction for attaining the ends aforesaid and which will prevent removal of the articles suspended from the hook, the construction being such as to increase the gripping action of the hook and lock-bolt proportionately to the degree of force exerted to pull or remove the hat, coat or other article from the hook without first releasing the lock-bolt.
    For a full understanding of the invention and the merits thereof and also to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to the following description and accompanying drawings.
    While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departing from the spirit or essential features thereof, still the preferred embodiment is shown in the accompanying drawings, in which:
    Figure 1 is a perspective view of a safety hook or check-lock, particularly designed for coats and wraps generally embodying the invention. Fig. 2 is a perspective view of the same as seen from the rear. Fig. 3 is a vertical section. Fig. 4 is a perspective view of a modification, the front or cap of the casing being removed and showing a different form of hook and lock-bolt, thereby adapting the device for both hats and coats.
Fig. 5 is a detail perspective view showing a portion of the key check in coöperative relation therewith. Fig. 6 is a perspective view of the lock-bolt. Fig. 7 is a perspective view of the upper portion of the shanks of the hook.
    Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.
    The hook 1 is provided at its outer end with a head 2, which is curved at its upper edge throughout its length to conform to the inner surface of a hat crown, thereby preventing injury thereto. The upper curved edge of the head 2 is beveled inwardly and downwardly so as to conform more nearly to the position of the article that may be suspended from the hook. The shank and curved portion of the hook are of a T form in cross section for the sake of lightness and strength, however it is to be understood that the hook may be of any cross sectional outline so long as it is sufficiently stout to withstand the strain and usage to which subjected. For convenience it is preferred to construct the hook so that it may be detachably connected to the casing, and for this purpose the end portion of the shank is provided with a stud 3 and a cross head 4, the latter projecting a short distance beyond opposite sides of the shank and the projecting ends being inclined to engage with the inner side of the back plate of casing by a wedging action. The stud 3 is centrally disposed and is spaced from the cross head 4 and acts jointly with said cross head to prevent lateral movement of the hook when properly positioned.
    The lock-bolt 5 is slidably mounted in the casing and is movable toward and from the head 2 of the hook. The lock-bolt projects above and below the casing and is provided at its upper ends with a head to receive the pressure of the hand when depressing or projecting the lock-bolt to secure the article suspended upon the hook 1. The lock-bolt may be of any cross sectional outline and is preferably of T-form in cross section. The lower end of the lock-bolt has a flattened extension 6 which is adapted to enter a depression 7 formed in the upper side of the hook adjacent to the head 2. The walls forming the depression 7 flare upwardly, as indicated most clearly in Fig. 3 and are adapted to