US2301751A

US2301751A - Demountable knob and cylinder lock

Info

Publication number: US2301751A
Application number: US337837A
Authority: US
Inventors: Walter R Schlage
Original assignee: Schlage Lock Co LLC
Current assignee: Schlage Lock Co LLC
Priority date: 1940-05-29
Filing date: 1940-05-29
Publication date: 1942-11-10
Anticipated expiration: 1959-11-10

Description

Nov. 10, 1942. w. R. SCHLAGE V DEMOUNTABLE KNOB AND CYLINDER LOCK Filed May 29, 1940 I N V EN TOR.

A TTORNEY Patented Nov. 10, 1942 DEMOUN TABLE KNOB AND CYLINDER LOCK Walter R. Schlage, Burlingame, Calii'., assignor to Schlage Lock Company, San Francisco, Calif., a corporation of California Application May 29, 1340, Serial No. 337,837

3 Claims.

This invention relates to a demountable knob and cylinder lock for door locks and the like, and especially to a structure whereby the cylinder lock and the knob are removably secured to a spindle and locked by key actuated mechanism against removal from the spindle, the present invention disclosing an improvement over the structures shown in my two former Patents No. 2,007,350 and No. 2,062,765.

The structures disclosed in the above identified patents both show a knob actuated spindle, a key means must be provided for holding and guiding actuated spindle mounted within the same, a

cylinder lock mounted in the outer end of the knob spindle, a knob mounted on the knob spindle, and enclosing the cylinder lock, a depressible latch for securing the knob against removal from the spindle, and means actuated by the cylinder lock for dogging or locking the latch against release, thereby providing key actuated 'means whereby the knob and cylinder lock are locked against removal from the spindle. Further, both structures show the dogging member as being carried by and formed as a part of the key actuated spindle.

The object of the present invention is generally to improve and simplify the construction and operation of structures of the character described, and particularly to provide a dogging member which is carried by the cylinder lock and actuated thereby, and which may also function as a driving member to rotate a key actuated spindle.

The improved structure forming the subject matter of this invention is shown by way of illustration in the accompanying drawing, in which Fig. 1 is a central vertical longitudinal section of a door knob and spindle, showing the cylinder lock mounted therein and the member carried by the cylinder lock whereby the depressible latch is dogged against depression;

Fig. 2 is a cross section taken on line II-II of Fig. 1;

Fi 3 is a cross section taken on the same line as Fig. 2 but showing the latch in depressed position;

Fig. 4 is a perspective view of the cylinder lock;

Fig. 5 is a perspective view of the knob spindle;

Fig. 6 is a perspective view of the key actuated spindle;

Fig. 7 is a perspective view of the depressible latch; and

Fig. 8 is a perspective view of the door knob showing the shank sleeve removed.

Referring to the drawing in detail, and particularly to Figs. 1, 2, 4, 5 and 7, A indicates a door knob and B a spindle upon which it is 55 the depressible latch and the spring actuating the same.

To accomplish this, a T-shaped slot is formed in the spindle. The leg portion of the slot lies parallel to the longitudinal axis of the spindle, as indicated at 2, and the head portion of the slot is transversely disposed, as indicated at 3. The leg portion of the slot is in this instance straddled by a pair of spaced bridging members generally indicated at 4 and 5, the bridging member 5 being grooved on its inner surface, and the bridging member 4 on its outer surface, and the grooves being of a depth equal to or slightly greater than the thickness of the spring whereby the depressible latching plate is actuated. The spring is clearly shown at 6 in Figs. 1 and 5. It is passed over and under the bridging members 4 and 5 and one end of the spring is thus secured while the free end extends through the depressible latching plate and exerts an outward pressure thereon.

The depressible latching plate is best illustrated in Figs. 1, 2, 3 and 7. It is a rectangular shaped plate with a central opening formed therein which is indicated at 1. This opening is substantially circular but it has a notch '8 formed in one side thereof. The function of the central opening and the notch will later be described.

Properly to support and guide the depressible latching plate, the transverse slot 3 is provided, and in addition thereto there is a second transverse slot which is indicated at 3a. The latter slot is formed directly opposite the slot 3 and is slightly wider than the slot 3 to permit the plateto be inserted therethrough when placed in position within the spindle.

The knob A is provided with a shank 9 and this has a transverse slot formed in it, as indicated at III, which slot registers with the slot 3. Hence when the depressible latching plate is projected by means of the spring 6, it extends into the slot III of the knob shank and thereby secures the knob both against rotation about the spindle and against endwise removal therefrom.

.To prevent children or any unauthorized individual from tampering with the depressible latching plate, a shank cover or ferrule II is provided. This covers the shank of the knob and the latch C. It has a pin hole opening l2 formed therein, and by inserting a pin, the pin will engage the upper end of the depressible latch.

Hence by applying proper pressure the latching plate may be depressed and the knob removed.

One of the important features of the present invention is to prevent depression of the latching plate so as to prevent removal of the knob, and a cylinder lock generally indicated at D is provided for this purpose. Any suitable type of cylinder lock may be employed, for instance, that shown in Fig. 4. It is inserted in the outer end of the spindle B prior to application of the knob, and when the knob is applied and secured by the latch C, the cylinder lock will also be secured against removal, as it is held against removal by an annular flange l3 formed in the outer face of the knob. A central opening I4 is formed in the outer face of the knob to expose the key receiving end of the cylinder lock. During the formation of this opening, the flange l 3 is formed, and as it engages the outer end of the cylinder lock, removal of said lock can not be made except when the knob is removed. Hence, if the knob is secured, so will the cylinder lock be secured.

Referring to Figs. 1 and 4, it will be noted that the inner end of the cylinder lock carries a dogging blade l5. This blade is detachably secured to the inner end of the core of the cylinder lock, but it may be rigidly secured thereto. The blade serves two functions, first, that of dogging the latch C against depression, and secondly, that of functioning as a driver to impart rotational movement to a key actuated spindle generally indicated at E (see Figs. 1 and 6). The key actuated spindle telescopes within the knob spindle, as shown in Fig. 1. The inner end of the key actuated spindle is closed by a plate I6 and a slot I1 is formed therein to receive and permit the blade l to pass therethrough. When a key is inserted in the outer end of the cylinder lock and rotated, the core, together with the blade l5, will rotate, This motion is transmitted to rotate the spindle E, and this in turn may actuate the latch of the door or any other suitable mechanism. The main function of the blade i5 is, however, that of dogging or locking the depressible latch C against depression except by an authorized person, that is, a person having the proper key for operation of the cylinder look. When the door is locked, the blade IE will assume the vertical position shown in Fig. 2. In this position it is impossible to depress the latch C. On the other hand, if a key is inserted in the cylinder lock and the core and blade l5 are partially rotated, for instance, to the position shown in Fig. 3, it becomes possible to depress the latch, as shown in Fig. 3. This time the knob may be removed and when the knob is removed, the cylinder lock may also be removed.

In the two former patents issued to me and heretofore referred to, key actuated means were also provided for dogging the latch C against depression, but both of these patents distinguish over the present structure to the extent that the dogging means was carried by the key actuated spindle. In the present instance, the dogging member is carried by the cylinder lock itself. Hence the key actuated spindle may be employed if desired, or it may be entirely eliminated, as dogging of the depressible latch is accomplished directly by the blade [5 of the cylinder lock and not by means carried by the key actuated spindle.

Furthermore, where a demountable knob and cylinder lock of the character described are employed, it is sometimes necessary to removethe cylinder lock for repair, and it is often necessary to remove it in order to change the combination of the cylinder lock, for instance, in apartment houses and the like. Repairing or changing of the combination in the cylinder lock is done in the field (i. e., not in the factory), and as locksmiths or mechanics of varying skill are encountered under such conditions, the structure must be simple and easy to reassemble. This is readily accomplished in the present structure, as when the cylinder lock is replaced in the outer end of the spindle, the only care or skill that-is required is to see that the blade I5 aligns with the slot ll of the key actuated spindle so that it will pass through said slot when the cylinder lock is pushed into place within the spindle. In fact, the cylinder lock can not be pushed into final place, nor can the knob be applied, unless such alignment is insured; thus reassembling cannot take place unless the several cooperating parts are correctly positioned, nor can any mistakes be made.

While these and other features of the invention have been more or less specifically described for purposes of illustration, I wish it understood that various changes may be resorted to within the scope of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

l. The combination with a knob spindle having a door knob and a cylinder lock mounted thereon, of a depressible latch member for securing the knob and cylinder lock against removal from the spindle, a key actuated spindle disposed within the knob spindle, said key actuated spindle having an aperture formed in its end, and a key actuated member connected to the cylinder lock and extending under the latch member and through the aperture in the spindle and forming a driving connection therewith whereby key actuation of the cylinder lock will transmit rotary movement to the key actuated spindle, said key actuated member in one position dogging the latch member against release, said latch member having a notch formed therein into which the key actuated member enters when assuming another position and thereby undogging the latch member, said key actuated member being removable from both spindles in unison with the door knob and cylinder lock when the latch member is undogged, and said key actuated member being of suflicient length to pass under the latch member when the knob and cylinder lock is being applied to the first named spindle thereby making it possible to undog the latch member by means of the key actuated member before the knob and key actuated lock are completely assembled on the first named spindle.

2. The combination with a door knob spindle, of a door knob adapted to be applied thereto, a key actuated lock within the knob and removable with the knob, a depressible latch member mounted in the spindle for normally dogging the knob and key actuated lock against removal, 9. second spindle mounted within the first named spindle, a blade carried by the key actuated lock and extended under the latch member and into driving connection with the second named spindle, said blade being removable with the knob and the key actuated lock and being rotatable by the key actuated lock to simultaneously rotate the second named spindle, and said blade being of sufficient length to pass under the latch memher when the knob and key actuated lock are being applied to the first named spindle so as to make it possible to undo; the latch member by means of the blade before the knob and key actuated lock are completely assembled on the first named spindle.

3. The combination with a door knob spindle, of a door knob adapted to be applied thereto, a key actuated lock within the knob and removable with the knob, a depresslble latch member mounted in the spindle and normally dogging the knob and key actuated lock against removal, a blade carried by the key actuated lock and extended under the latch member, said blade being removable with the knob and key actuated lock and being rotatable by the key actuated lock, said blade being of sufficient length to pass under the latch member when the knob and key actuated lock are being applied to the spindle so as to make it possible to undog the latch member by means of the blade before the key actuated lock and knob are completely assembled on the 10 spindle.

WALTER R. SCHLAGE.