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Publication numberUS1021864 A
Publication typeGrant
Publication dateApr 2, 1912
Filing dateJan 27, 1911
Priority dateJan 27, 1911
Publication numberUS 1021864 A, US 1021864A, US-A-1021864, US1021864 A, US1021864A
InventorsCarl Denzler
Original AssigneeCarl Denzler
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1021864 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



1,021,864.- Patented Ain'. 2, 1912.




. Patented Apr. 2, '1912.

2 SHEETS-SHEET 2 5mm/Lto@ C A/iz BfA/ZL EFE.



Specification of Letters Patent.

Application4 med January a7, 1911.

Patented Apr. 2, 1912. serial No. 604,950.

To all whom'z't may concern:

Be it known that I, CARL DENzLER, a .c1t 1 zen of Switzerland, residing at Detroit, 1n the county of Wayne andv State of Michlgan, have `invented certain new and useful Improvements in Locks, of which the. following is a specification, reference being had therein to the accompanying drawings.

This invention relates to door-locks, and

it has for one of its objects the .provision of. a device of the character, in whichl the latch bolt is normally held against withdrawal movement in a positive manner.

The invention has, furthermore, for 1ts objectfthe provision of a combined latch and lock-bolt 1n combination with means for locking the same against Withdrawal in such a manner that for vordinary use a push or pull of the knob member in the directlon in which the door is to be swung will permit the latch-boltto be withdrawn by a sprmg.; while, on the ot-her'handsuch release 1s pos1- tively prevented.

Other objects of the invention will hereinafter appear, and their means of attainment will be specified in the claims.

The invention has been clearly illustrated in the accompanying drawings, in whlch similar characters denote similar parts and in which-l Figure 41 represents a horizontal section through the swinging end of` a door, wlth its lock and also a portion of the joint, all 1n closed position but set- VV'for ,ordinary use, v iz: without a key; Fig. 2 lis a vertlcalsection on line 2-2 of Fig. 1; Fig. 3 is a slmilar section on line 3 3 of Fig. 1; Fig. 4 represents a vertical section `through the door,

the lock, and the jamb, on line of Fig. 1, and Fig. 5 is a perspective vlew, of the outer push-member of the lock.

Briefly stated, my improved lock comprises a bolt which serves at the same time for a latch and also security-bolt, and whlch is normally held in its locked posltlon 1n a ositivemanner by a slide which is operable y a plunger connected with the door-knob. The bolt is normally thrown inward, that 1s: out of engagement with the .keeperh by a spring whenever the slide is 1n positlon to permit such action. In fact the sllde member is the controlling feature of the devlce, as upon its movement depends the operation of the bolt. This slide may also be locked against longitudinal movement by a catch operable from the inside face of the door,

so that the latter cannot be opened either from outside or inside. In order to permit the door to be locked fromthe outside so that a key may be used, the slide is mounted forrotation thereby, to present a plain surface to the lock bolt to rest against, and the movement of the outside plunger will then have no effect on the position of the lockbolt in the keeper, in which case the key must be used again to reopen the door from the outside without however presenting any obstacle to the door being opened from the inside by turning and pulling the knob. Again, the catch may be operated to prevent the slide being moved vin any way, in which case the door cannot be opened either from outside or the inside.

Referring to the drawings, the door-casing or jamb J has a keeper 10 provided with a perforation 11 to receive the lock-bolt of the'door. TheVY door D is mortised to receive the lock which comprises a stationary inside' plate 12 the flange 12 of which may be rigidlyl secured to the door in any desired manner. The central portion of the plate has a'fgrearwardl'y extending tubular projection 13 within which the controlling member of the lock is mounted for rotation as well as for longitudinal movements. A lock-bolt 14 is mounted for movement'transversely to the axis of the extension 13',- and is guided at its inner end in a cylindrical boss 15 of said extension; while its outer end is guided in a cylindrical lug 16 of the face plate 17, both lug 16 and boss 15 being preferably connected by a tube 18. As above stated, the lock-bolt is normally withdrawn from the keeper, as for instance, by a spring 19 interposed between the face of the lug 16 and a collar 20 on the bolt. 4The inward movement ofthe latter is controlled b v a member mounted for rotative and also sliding movements in the `extension 13, and which comprises `a cylindrical body 21 which is 'cut-away at 22 to form a cam face 23, so that when the body 21 is moved in the direction of arrow a (Fig. 1) the lock-bolt 14 may move inward and out 4of engagement with the keeper 10. A vspring 24 surrounds the stem 25 of the controller and serves no1--` mally to place the Vbody 21 into the position shown-in Fig. 1, by -virtue of its strength being superior to that ofthe bolt-spring19. This outward movement ofthe controller may be limited by a key-screw 26 secured onthey inside knob 27 and entering a collar 28 which is loose on the stein and rests against ay set-collar 29 in the stem 25. It will therefore be 'seen that when a pull is exerted on the knob 27, the body 21 will be pulled forward against the action of the spring 24 and the bolt 14 will therefore be permitted to move inwardly by the force of the spring 19 and thus finally clear. the keeper 10. Now, inasmuch as the knob has thus been pulled away from the door-plate 12, it follows that as soon as the bolt- 14 is clear of the keeper 10, the door will follow the knob 27, the notch 22 being maintained in position against rotation opposite the lock bolt 14 by the inner end 30 of a catch member 30 riding in a longitudinal groove 31 formed in the body 21.

Secured to the outside of the 'door D, is a hand-knob 35 in axial alinement with the controller and the extension 13 of the inner plate 12, both parts being positively interlocked against rotative movement rela- -tive to each other by wings 36 (see also Fig. 3) formed on the `extension 13 and enter ing grooves 37 in the outer knob-member 35.

Means are provided for longitudinally moving the controller from the outside of the door, these means consisting of a Achambered plunger 40 which is guided in the knob 35 and the extension 13, the inner end of said plunger abutting against the outer end of the body 21, which is provided on its abutment face with a plurality of radial ribs 41 adapted to engage V shaped grooves 42 in the abutment face of the plunger, for purposes to be hereinafter described. In order to prevent the plunger from being rotated and yet be longitudinally movable, it is provided with a pair of diametrically opposite wings 43 (see also Fig. 5) slidable in grooves 44 in the knob 35, as limited bya sleeveecollar 45 in screwt-hreaded engagement with the latter. Under ordinary conditions the outer knob could be removed together with the plunger, and in order to prevent tampering with the lock mechanism, the controller comprises an outwardly extending stem 47 passing through the inward end of the plunger, and provided with a screw-collar 48 movable within the chamber of the plunger. Removal of the knob 35 as well as of the plunger 40is therefore prevented from the outside of the door, through the set collar 29 (on the inward end of the controller), the intermediate collar 28, the inner door-plate 12, the controller with its collar connections 29 and 48, the wings `43 and'screw sleeve 45. In the combination shown in Fig. 1, the door may be opened by an inward pull on the knob 27, or by an inward push on the plunger 40. When it is now desired to secure the door against unauthorized intrusion, it will only be necessary to lock the oontroller against longitudinal movementand thus prevent the lock-boltv from moving inward. The catch-device 30 answers this purpose. Since the groove 31 is normally in longitudinal alinement with the catch 30, I deem it preferable to rotate the .controller in the direction of the arrowA b (see Fig. 1), a groove 50 (see Figs. 1 and 4) being provided to permit such rotation for about ninety degrees, which will bring the groove 31 out of alinement with the catch 30, and at the same time presenta plain surface to the inner end of the lockbolt 14. The groove 50 has a stop-face 51 and a deeper recess 52 into which latter the catch 30 may be forced against the action of a spring. 53, which normally maintains said catch in the position shown in Fig. 1, and is seated in a recess 54 of the door-plate' extension 13. This inward movement of the catch is effected by a hand-operated lever secured on a spindle 55 which is journaled in the door plate 13 and carries a cam 56 (see Fig. 4) having fiat sides whereby the springpressure on the catch 30 will hold the cam in its position either to force the catch 30 int-o the deep recess 52 or else as illustrated, under which conditions the door may be locked from the outside by a key such as K, which may have any particular characteristics as to its fitting the controller, the present form comprising a pair of pins K adapted to enter correspondin recesses K in the controller. It is just 1n connection with this turning movement of the controller that the ribs 41 and plunger-notches 42 come into play, because they will yield- Yingly hold the controller'against accidental rotation relatively to the non-rotatable plunger 40. A person leaving the house can therefore use a key to lock the door, and it will require a key from the outside, or else a partial rotation of the inside knob to reopen the door, the inside knob being interlocked for rotation with the controller by the end of the knob-screw 26 entering a slot 57 in the controller-stem 25. When it is desired to lock the door against being opened by any means whatever, from inside as well as outside, the handle 55 is swung to force the pin-end 30 into the deep recess 52 of the plunger. Normally the inner end of the lock-bolt is in slighty surface contact with the inclined face 23 so that the door, when open, may be closed byforce,l

y said bolt inits pro]ected position, said. body therefor comprisin a body for maintaining having a recess adapted to be broughtinto register with -said boltV to permit the retraction thereof, and a' knob for moving said controller, and means for locking said controller against rotation.

2. The combination with a .normally-retracted lock-bolt, of a longitudinally movable and rotatable controller therefor comprising a body for maintainin said bolt in its projectedposition, said bo y having intermediate its ends a recess adapted to be brought into register,with said bolt from either direction to permit. the retraction thereof,` and a knob for moving' said controller, and means for locking said controller against longitudinal vmovement and againstrotation.

3. The combination with a' normally-retracted lock-bolt, of a movable controller therefor comprising a body for maintaining said bolt in its projected position, said body having intermediate its ends a recess adapted to be brought into register with said bolt from either direction to-permit the retrac- 1 tion thereof, and aknob for moving said controller, a hand-operable catch for locking said controller against movement and com'- prising a slip-bolt, a spring for withdrawing said'slip-bolt, and a cam for bringing said slip-bolt into lock-engagement with the controller.

4. The combination with a lock-bolt, and a plate for supporting the same, of a slidable rotatable controller having va recess adapted to receive the lock-bolt when. retracted, al spring between said bolt and plate, and an independent non-rotatable plungeryforumoving said controller longitudinally, and frictional interlocking means between said plunger and controller.

5. The combination with a lock-bolt, and a plate for supporting the same, of a slidable rotatable controller having a recess adapted to receive `the lock-bolt when retracted,aspring between said bolt and plate, and an independent non-rotatable plunger `for moving said controller longitudinally,

and a rib-and-groove connection between the ends ofsaid plunger and controller for frictionally positioning the controller rotatively relatively to the plunger.

tionary door handle disposed on the other y side f said door, of a lock-bolt', means for normally retracting said lock-bolt, a controller movable in said extension and havl c zing a recess adapted to receivesaid lockbolt, a plunger supportedv in said handle for moving said controller longitudinally, a pull-knob on the plate-side ofthe door, and means for connecting said pull-knob and controller lfor longitudinal movement to bring said recess into register 'with said lock-bolt.

7. The combination', with a stationary.V

door plate disposed on one `side of a door and 'having a tubular extension, a stationary gitudinally, a rotatable knob on the plateside of the said door, and means for connecting said controller and knob for co-rotation and longitudinal movement.

8. The combination with a lock-bolt, and a plate for supporting the same, of aV slidable -rotatable controller having a. recess adapted to receive the lock-bolt when retracted, a spring between said bolt and plate, and an independent non-rotatable plunger for moving said controller longitildinally, and frictional interlocking-means between said plunger and controller, said controller having an extension supported in aid plunger and adapted to be rotated by a ey. y

In-testimony whereof I aiiix my signature in presence of two witnesses.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2804329 *Dec 23, 1954Aug 27, 1957Earle H LandisDoor latch
US3710604 *Aug 9, 1971Jan 16, 1973Cillick HDoor latching apparatus
US4676081 *Aug 12, 1985Jun 30, 1987Keycon Industries, Inc.Snap-in semi-flush mounted panel lock
US9145719Sep 5, 2012Sep 29, 2015Milocon Inc.Apparatus for a door latch
US20100032966 *Jul 21, 2009Feb 11, 2010Fence WarehouseGate latch device
WO2013036542A1 *Sep 5, 2012Mar 14, 2013Milocon, Inc.Improvements for apparatus for a door latch
U.S. Classification70/469, 292/182, 70/474, 70/488, 70/470, 70/DIG.800, 70/483
Cooperative ClassificationE05B55/00, Y10S70/80