US637100A - Knob attachment. - Google Patents

Description

No. 637,|oo. Patented'nov. |4, |399'.

c. J. Emcsou. KNOB vATTMHMENT.

(Application led June 29, 1899.)

(No Model.)

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' UNITED- STATES PATENQ OFFICE. A

CHARLES JOSEPH ERICSON, OF SALT LAKE CITY, UTAH, ASSIGNOR OF ONE- HALF TO GEORGE G. LINEN, OF NEW YORK, N. Y.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 637,100, dated November 14, 1899.

' Application filed im@ 29,1899. serial No. 722,251. (No man.)

T0 all whom, it may concern:

Be it known that I, CHARLES JOSEPH ERIC- sON, of Salt Lake City, in the county of Salt Lake and State of Utah, have invented anew and Improved Knob Attachment, of which the following is a full, clear, and exact description.

The invention relates to door locks and latches; and its object is to provide a new and improved knob attachment which issimple and durable in construction and arranged to securely lock the knob on the screw-spindle, to perfectly lit any thickness of door, and prevent transverse play of the spindle in the lock.

The invention consists of novel features and parts and combinations of thesame, as will be fully described hereinafter and then pointed out in the claim.

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all 'the views.

Figure l is a cross-section of a door and door-lock with the improvement applied. Fig. 2 is a sectional side elevation of the improvement. Fig. 3 is a transverse section ofthe same on the line 3 3 in Fig. 2. Fig. 4 is a like view of the same on the line 4 4 in Fig. 2. Fig. 5 is a face View of the locking-plate, and Fig. 6 is a side elevation of the improvement as applied to a swivel-spindle.

The spindle A is provided at one end with aflxed outer door-knob B, secured to the spindle in any suitable manner, and on the inner threaded end A of the spindle screws the shank C' of the inner door-knob C. In order to lock this door-knob C in position on the spindle A, I provide a clutch having two members D D', of which the member D is secured on or formed integrally with the inner end of the shank C', and the other member D has a central polygonal opening corresponding to the cross-section of the spindle A to allow of freely sliding the member D' longitudinally on the spindle, but to hold said member from turning on `the spindle.

As shown in the drawings, the clutch member D on the knob is formed with four radial recesses adapted to be engaged by four projecting ribs on the other clutch member D', and said ribs and recesses are placed an equal distance apart, as is plainly shown in Figs. 3 and 4, so that a quarter-turn given to the 55 knob C will bring the recesses and ribs in register with each other. It is evident that when the movable clutch member D' is in engagement with the other clutch member D on the knob the latter is held against screw- 6o ing on the spindle in either an inward or outward direction.

In order to lock the movable clutch inember D against sliding on the spindle A after the clutch members are in mesh with each other and after the knob C has been screwed up on the spindle A to the desired position, l provide a holdin g-plate E, secured to the door F in the rear of the escutcheon G and abutting against the inner face or back of the 7o clutch member D'. The plate E is preferably in the shape of a fork, as is plainly shown in Fig. 5, so asto straddle the spindle A and allow free turning thereof to actuate the lock and open or close the door, but principally 75 hold the member D' from rearward movement on the spindle.

The door F is formed with a counterbore F', concentric to the spindle A, to allow of sliding the movable clutch member D' inwardly 8o on the spindle A previously to placing the retaining-plate E in position on the door F to allow of screwing up the knob C on the threaded end of the spindle A' until the knob is in proper position relatively to the thickness of the door on which the lock is applied.

In using the device the outer escutcheon G' is placed in position on the door, and the spindle A, with the knob xed thereon, is placed in position by being passed from the outer 9o face of the door through the escutcheon and the hub of the lock, and then the knob C is screwed upon the inner threaded end A of the spindle, the movable clutch member D' on the spindle being between the two knobs and within the counterbore F' of the door.

' The escutcheon G is engaged or hungloosely on the shank C' of the knob, and when the said knob has now been screwed up to its proper position on the spindle A, according roo to the thickness of the door, then the operator, by pushing the knob C against the clutch member D, which is resting against or in the counterbore F', causes the shank of the knob C to mesh with the clutch member D, and then the knob is drawn forward, the clutch D being in engagement with the shank C', and the clutch D will follow the knob C until its rear face is moved beyond the face of the door a distance corresponding approximately to the thickness of the plate E, which is now applied on the door-face to straddle the spindle A and prevent inward sliding of the clutch member D, so that the latter cannot -get out of engagement with the clutch member D, and consequently the knob C is prevented from screwing inward or outward on the spindle A. The plate E is secured in position on the door-face F and then the es- .outcheon G is fastened in place on the door in the usual manner to cover up the plate E.

Now it is evident that by the arrangement described the knobs cannot be removed from the outside of the door when the door is locked, and separate set-screws or similar fastening devices are entirely dispensed with for holding the knobs in place.

lVhen the device is used on a swivel-spindle G2, as shown in Fig. 6, then both ends of the spindle are threaded and engaged by knobs H, each having a clutch I for holding the knob from screwing outward on the spindle in the manner above described relatively to the knob C and the clutch having the members D D'. It will be seen that though both knobs are adjustable, when placed in position on the door the outside knob cannot be taken O, as it is secured in exactly the same manner as the solid spindle, where only one knob is adjustable.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- In a knob attachment, the combination with a spindle, the knob screwing thereon and having its shank formed with a fixed clutch member, and an opposing clutch member movable longitudinally on the spindle but held from turning thereon, of the forked plate E, arranged to straddle the spindle in rear of the movable clutch member and to be secured directly to the door in rear of the escutcheon, the members of the fork of the plate being of a length greater than the diameter of the movable clutch member, whereby the plate alone holds the movable clutch member from rearward movement, thereby enabling the fastening to be used With any style of escutcheon, substantially as described.

CHARLES JOSEPH ERICSON.

Witnesses:

GEO. MASON, CHAs. D. SAVERY.

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