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Publication numberUS365775 A
Publication typeGrant
Publication dateJul 5, 1887
Publication numberUS 365775 A, US 365775A, US-A-365775, US365775 A, US365775A
InventorsJ. Bennett
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fastening for knob-spindles
US 365775 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)



Patnted July 5, 1887-.


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Tire Tarts PATENT an on.



SPECIFICATION forming part of Letters Patent No. 365,775, dated July 5, 1887.

Application filed April 531, 1887. Serial No. 235,660. (No model.)

To all whom it may concern:

Be it known that I, JULIAN J. BENNETT, a citizen of the United States, residing at J ackson, county of Jackson, State of Michigan, have invented anew and useful Fastening for Knob-Spindles, ofwhich the following is a specification.

This inventiou'rclates to that class of devices for locking the spindle of a door-knob which employ a sliding plate ,having a slot with straight sides adapted to receive the square spindle and prevent it from turning.

The object of the invention consists in certain improvements in the construction of the rose and the lock-plate, substantially as below set forth and claimed.

In the drawings forminga part of this speciticati on, Figure 1 shows the outside of the rose with the knob and spindle removed. Fig. 2 is a View of the inside of the rose and a view of the lock-plate, the spindle being in crosssection; Fig. 3, the same as Fig. 2, the latter figure showing the spindle unlocked, and Fig. 3 showing it locked; Fig. 4., a view of the lock-plate, and Fig. 5 is a side elevation of the knob and spindle and parts in section on line 3 3 in Fig. 1. Referring to the lettered parts of the drawings, O is the doorknob, A the knobspindle, B the rose, and F the door.

The lock-plate D is provided with a slot, 0,

- having straight sides of a size to slide onto the square spindle A. The slot 0 opens into a larger slot, or an enlarged branch of the slot 0, of a size to allow the spindle to turn therein.

The rose B has a recess 011 the back side, made by cutting away a portion of the flange I 3, so as to leave shoulders at l and at 2. These shoulders limit-the lateral movement of the plate D-that is, referring to Fig. 2, the plate 1) is against shoulder 1, and in said position is ready to be pushed down, as in Fig. 3,which action brings the slot 0 over the square spindle A. The rose has a slot at X, which, when the plate is in the position in Fig. 3, receives a projecting rib, a, of the handle of the plate D, and thus the plate is held from swinging when an attempt is'made to turn the door-knob.

Fig. 2 will serve to show the operation of unlocking, by supposing the plate to have been drawn out until the spindle is in the enlarged portion of the slot of the plate D. New, by swinging the plate to the position shown by dotted lines until it strikes against the shoulder 2, there will be no. danger of its accidentally sliding on the spindle again, and the spindle will turn readily in the enlarged end of the slot 0, as before stated.

The dotted positions in Fig. 1 indicate like position of the plate in Fig. 2. It will be ob served that I effect these .results by simple changes in the rose and by the employment of only one element not found in the ordinary door-kn0b-viz., the peculiar plate in Fig. 4. Thus I produce a cheap, simple, and easilyoperated lock, and one not liable to get out of order.

The plate I) stands at an oblique angle corresponding to the angle of the sides of the spindle A, and for this reason it will rest against the shoulder 2 by its own weight, and the jarring of the door will not cause the plate to fly up and slide down and accidentally lock the spindle. I

In the sectional view, Fig. 5, the plate D is just ready to be forced down to lock the spindle.

In view of the fact that the prior state of the art discloses slotted locking plates or slides, I donot claim said feature parse,- but What I claim, and desire to secure by Letters Patent, is

The swinging and sliding lock-plate having the enlarged hole through the lower end, the lockingslot opening into said hole and having the projection at the other end, combined with the rose having a portion of its rearwardlyextending flange cut away, forming a space wider than the lock-plate, and the shoulders to limit the swing of said plate, and having the oblique notch open at the top to receive the projection of the lock-plate and prevent the latter from swinging, substantially as set forth.

In testimony of the foregoing I have hereunto subscribed by name in presence of two witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5909919 *Oct 7, 1997Jun 8, 1999Taiwan Fu Hsing Industry Co., Ltd.Auxiliary lock assembly with additional interior locking
Cooperative ClassificationE05B13/004