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Publication numberUS804399 A
Publication typeGrant
Publication dateNov 14, 1905
Filing dateMar 30, 1905
Priority dateMar 30, 1905
Publication numberUS 804399 A, US 804399A, US-A-804399, US804399 A, US804399A
InventorsJohn C Hardenbergh
Original AssigneeJohn C Hardenbergh
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 804399 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 804,399. PATENTBD NOV. 14, 1905. J. C. HARDENBBRGH. DOOR LOCK.




PATENTED NOV. 14, 1905.







Specification of Letters Patent.

Patented Nov. 14, 1905.

Application iiled March-30, 1905. Serial No. 252,832.

This invention is a combined door lock and latch having key mechanism in one of the knobs.

It is characterized particularly by a clutch, one member of which operates the latch-bolt and the other member of which is carried by the outside knob, and the knob-spindle maybe moved lengthwise to engage or disengage the clutch. Key-operated means are provided to turn the spindle from the outside when the clutch is disengaged. On the inside means are provided to lock the clutch at disengagement.

The invention is illustrated in the accompanying drawings.

Figure 1 is an edge view of a door with the lock in elevation. Fig. 2 is a vertical section with the clutch engaged. Fig. 3 is a vertical section with the clutch disengaged. Fig. 4 is a section on the line 4 4 of Figs. 2 and 3. Fig. 5 is a section on the line 5 5 of Figs. 2 and 3. Figs. 6 and `7 are details in elevation showing the latch on the inside of the door which holds the clutch in or out of engagement. Fig. 8 is a horizontal section through the edge of the door, showing the latch in plan.

' Fig. 9 is a plan of the key.

squared portion of the knob-spindle and turnsA therewith. The member 11 carries the lugs 12, which operate the latch-bolt 13.

14 indicates a circumferential rib on the spindle between the squared portion 8 and the round portion 10, and the sleeve 9 abuts against this shoulder, so that it may be moved lengthwise with the knob-spindle to engage or disengage the clutch members.

At the outer end beyond the round portion 10 the knob-spindle has a reduced squared portion 15, over which is sleeved a nipple 16 of a circular lock-casing 17. The nipple is fast on the squared portion 15. This casing is rotatable in the knob, or, rather, the knob is rotatable upon the casing; but when the casing is turned it also turns the knob-spindle by means of the squared connection between 15 and 16. The knob and casing have a keykole at 18 to receive the key 19, which has a bit 20, adapted to project through a notch at 21 in the inner wall of the casing and into a notch at 22 in the outer end of the clutch member 9, thereby locking the knob and casing together, so that when the knob is turned the casing and spindle will also be turned. The keyhole 18 is staggered with respect to the notch 21, so that when the key is inserted it must rst be turned in the casing before its bit can enter the notch.

The face-plates upon the inside and outside of the door are indicated, respectively, at 23 and 24, and the latter has a tubular portion 25, in which the outer clutch member 9 turns. The shank 26 of the inside knob has therein a groove 27 to receive the forked end of a sliding latch 28, normally pressed down by a' spring 29. This latch-piece slides in guides in the face-plate 23 and acts to hold the clutch members 9 and 11 in or out of engagement.

When used as an ordinary latch, the inside knob is pulled out, as shown in Fig. 2, with the latch 28 engaging behind the rib 30 on the shank of the inside knob. This draws the member 9 inwardly and holds the clutch members together, so that when either knob is turned the latch will be operated. When used as a lock, the latch 28 is lifted and the inside knob is pushed 4in a suflicient distance to disengage the clutch member 9 fromthe member 11. If then the outside knob be turned, it will simply rotate the clutch member 9 upon the round portion 10 of the spindle without operating the door-latch; but if the key 19 be inserted as described the casing 17 and knob will be `locked together and the casing will turn with the knob, which motion, by means of the squared portion at 15, will be communicated to the knob-spindle, and thus to the door-latch.

What I claim as new, and desire to secure by Letters Patent, is- Y 1. In a combined latch and lock, the combination of a bolt-actuating spindle having one knob fast and another rotatable thereon, the spindle having thereon one clutch member and the loose knob having another clutch member also rotatable on the spindle, the spindle and knobs being slidable lengthwise to engage or disengage said clutch members,



and key-operated means to look the loose knob and the spindle together When the clutch is disengaged.

2. In a combined door look and latch, in combination, a bolt-actuating spindle having an inside knob fast thereon and an outside knob rotatable thereon, clutch members Carried by the spindle and loose knob respectively, the spindle being slidable lengthwise to engage or disengage the clutch, a latch on the inside of the door engageable with the spindle to hold the clutch as set, a casing fixed to the spindle Within the loose knob and on which said knob is rotatable, and means to lock the knob and casing together.

In testimony WhereofI have signed my name to this specieation in the presence of two subscribing Witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2949329 *Mar 1, 1957Aug 16, 1960Shoalts Richard LDoor lock
US4650229 *Jun 27, 1985Mar 17, 1987Anstalt Fur SchliesstechnikLock arrangement for a door panel
US5056835 *Sep 26, 1990Oct 15, 1991The Chamberlain Group, Inc.Latching mechanism for a closure with a disconnectable handle and a sliding catch
US7712343 *Sep 1, 2005May 11, 2010Master Lock Company LlcDead locking deadbolt
Cooperative ClassificationE05B55/005, Y10S292/27