US2611635A - Latch mechanism - Google Patents

Description

sept. 23, 1952 R. C, CERF, JR 2,611,635,

Y LATCH MECHANISM Filed Dec. 30, 1948 2 SHEETS-SHEET l gg m59 ATTORNEY LATCH MECHANISM Filed Dec. so, 1948 2 SHEETS- SHEET 2 FIG. 5. FIG- 7 224 23 22 66 23 H3 66 HO m` 29 L 2O 54 lo f 57 4o 6662 63 52 3o 524 34 4? n3 27 FIG. 8. H9 24 25 23 2e 2l FIG. l.

iNvENToR ROBERT C. CERF JR.

ATTORNEY Patented Sept. 23, 1952 ite-termi CrrgiJg-Lps Angel-admire assigner: fv Hommes-Hardware Mnufefrin'g bom-- l cnrrnia p'an'y; Limv A-"ngeiles-,LCalifi,V ai corporatioirofa.

i 1S:v This invention relates Lto' and in particular to, adorn'.lin'c lo".ltt`chsethiagveL a push button type spindle locking means 'fr'l'o'cking one knob against turningby a coaxiallpisl button inthe opposite k'nob'.

The general object offthis invention iswtofprovide a door knob latch set y'inwhicl oneknob'. (for example, the outsideknob) maybe-lockedagairist.

rotation rby means. of. a Ycoaxial-'push button are ranged in the oppositeknobxon the insideof the door) which push buttonlmeans. is. releasab'lefrom'its pushed-impositionby;theturningfofgthev inside knob. Another objectl is: to provide; in1 addition, a .door knob Jlatch :set lnwhiehthelocking push button .isalsoreleasedl iiloeked-)f by`V pushingin the latch bolt, :which movement would occur if the door were aceidently, closedpwhenzthe. latch bolt would be pushed-inwardly:Q uponstrikingE the striker plate Aefurtherrobjectiseto'provide in a door knoblatch set:of:thekindldeseribedy supplementary means for the lreleaseofth'eflateh2 locking means from Vtheontsider in the eventi-an emergency opening-ofthe door. isf-requ-i-ied.4v

This type'door knob latchsetfis-fadaptedrparf' tcularly, for-example, for-euse on afbathroom door: which is to *be looked; froxnthe inside sand Whiclrf may be: unlocked -fromfthe.finsideebythef.:turning;y

of the insideknob.v v

These and otherobjects@ of; invention? are: attained by my invention: which: swllii f be; under;n f stood from theA following; descriititiorr,` reference:- being madev tothe@ which:

Figure` 1 is ra'zplan'zvi'ew' L'partltinnseetibrreand?. with portions broken away"torbettexffshowethe structure; i

Figure 21 issazplanf viewfpartlysirr;sectionand with portions brokerrawaythisiviewbeinge sinilarQT lpush but:

to that of Figure ll:excepttl'atitheioiitsider is 'shown in lo'ckediposition duel-tol-t e.

line 4-4 of Figure l" Figure 6 is a' fragmentarycrosssettionalview Figure] 1o is az,perspective,disssemmy'viw" a dooriknonlttli" ser snowing tHeLou-tsid knob spinuilxiiigliii and' the emergency 'relas'l-aadis bit retr-actiony means; i Figureiifisaperspectivelvievifof-'thelpshbiittonspindieioekingsleev asseib q I Figurel 1211511 agpartiai perspetiveyiew outside4 knob hun: and outside k-ifioispindleesil Figurer-i3 se parta pefspetive View*E the# insta-e knob riutifand inside know-spindle essere# bly? Figure 14de-a' perspectivevievofffspr "gffiat unit; and

bI "dm" with a circumferential retaining key slot 4| which is arranged adjacent a retaining key boss 42 on the kbearing sleeve 36 adjacent the end of the cylindrical outside half portion 22.

The outside spindle and the inside spindle 3l are each removably held in their respective bearing sleeves 29 and 36 by the retaining keys 4i.

which are adapted to fit in the retaining key slots d 33 and 4| respectively, and in the circumferential key slots 35 and 43 provided respectively inthe spindles 39 and 31, the spindle slots being long enough (for example, about 180 to permit the turning of the spindles for a suilicient amount to actuate the latch operating retractor 50. The retaining keys 44 are each provided with holes 45 4 turn of either knob in either direction to thereby retract the retractor and with it the latch bolt 59. The spring pressure causes the knob and spindle to return to the neutral position after each turning.

The outside knob 3| and its spindle 39 are adapted to be locked against rotation by means n of the locking tab 60 extending from the periphthrough which is passed a hairpin spring 4S arranged to removably hold the keys in place in the.

slots, the xed ends of the hairpin springs each being attached by ,a screw 41 in a groove 40 provided inthe ends of the cylindrical half portions 2| and 22. c A

The cavity inside the retractor body is adapted to contain the retractor 50 which is a generally y rectangular shaped frame, which is provided at its middle portion with a thrust plate partition 5|, and at one end with opposed edges or lingers 52 whichare arranged adjacent the window 53 in the cylindrical wall of the retractor body facing the spring latch unit 54. rIhe fingers 52 are adapted to engage the latch bar 55 at the lopposed notches' 55.

The spring latch unit consists of a cylindrical housing 51 having a flush` plate 53 at the outer endthrough whichprotrudes the latch bolt 59, with a coiledcornpression spring 69 between the inner end of the latch bolt 59 and the opposite end closure plate 5| of the housing 51, so that the latch bolt isV normally thrust outwardly by the action of the spring. The spring latch unit is attached to the retractor body 20 adjacent the may thus be positioned, as required for align' ment of the parts, along the window margins-` 93 and along the slot formed by the opposed edges or fingers.

The retractor 50'is mounted to slide between guides 66 on the inside end wall of the cavity,

and also on the aligning pin 61 which is clamped in the half cylindrical grooves 58 in the aligning ery of the locking tab disk 8| which is rotatably mounted on the emergency release shaft 83 which in turn is :mounted within the outside tubular spindle 30, -The disk 8| serves to centrally space therelea's'e shaft in the spindle 39. An emergency ,semiecylindrical rollback 85 is at- Y tached to one end of the shaft 83 by means of the tongue'86 riveted in the hole 81 in the end 94 of the emergency rollback member 85. There is also mounted on the shaft 83 a spacer 88 which abuts one end of a coil spring 89, `whose other end presses against a Irotatable. centering disk S9, whichin turn abuts a 'collar' 9|@on the end of the shaft 83. The end oi the shaft 83 adjacent the collar is provided witha `coupling bar 92 which makes operative engagement with a corresponding hole 93A in the emergency release plug 93. The emergency release plug 93 is inconspicuously mounted for turning in a coaxial Y opening 3|A in the knob 3|, ai slot 82 adapted pin bosses 1|) and 1| respectively in the outer half'portion 2| and the inside'half portion Y22 of 12 through which the aligning pin 61 passes. The

purpose oi these detent tabs will be later Vdef scribed.

The outside tubular spindle 30 and the inside tubular spindle 31 are each provided at its inner end with rollbacks 15 and 13 respectively. A rollback consists of the semi-cylindrical end portions of the tubular spindles, .the longitudinal edges 15A and 16A of which are adapted to press alternatively upon the upper face of'the'thrustfv plate partition 5| of the retractor 50 so that said: retractor is pressed against the spring 69 by a" the disk V8| locks the rotation of the outside spindle when it is moved longitudinally into the locking groove 951which is provided through the spindle '39 and in the coinciding groove 96 in the bearing sleeve 29.- 'The locking tab 80 is moved longitudinally by means of the locking sleeve 98 which is'operatively connected to the push button 91 by means of the connecting bar 99 which makes swivel connection at |09 with one end of the locking sleeve 98.

The locking sleeve 93 in its central portion is out away in order to avoid interference with the reciprocatory operation of the retractor 50, and. in the longitudinal edges ofthe segmentof the cylinder remaining which is preferably less thanone-half of the cylinder, there are provided de-A tent teeth |04 which are adapted to engage the raised detent tabs 13 previously mentioned, providedon the Vthrust'plate partition 5|. An elongated hole |92is provided through which the pin 61 passes to permit longitudinal movementof the locking sleeve. The inner end of the locking sleeve 98 slidesover the emergency rollback. The inner end of the locking sleeve 98 is provided with an opening |05 which permits limited rotational `movement of the locking tab therein, the end |06 of the opening being adapted to press directly against the locking tab 80 against the spring 89 and thereby force the locking ,tab 89 into locking groove95 inthe spindle 30'and the corresponding groove 96 in the bearing'sleeve 29.

The detent teeth |04 are held by the detent tabs 13 so long as the retractor 50 anditspartition plate 5| are in the out position V for the latch bolt 59; When the retractor 50 is moved from the position by the pressing in of the latch bolt 59, or bythe turning of the outside knob rollback 15, or the `insideknob rollback 16, or by the emergency rollback the teeth |04 become disengaged fromthe tabs 13, and the locking sleeve 98, and its attached pushv button 91 are moved toward'the inside knob under the pressure of the spring 89, .restoring the push button to the unlocked position. The endv |06 of the opening |95 in the locking sleeve 98 upon this backward movement of the locking sleeve 98, a1-

lows the locking tab 89 to become disengaged from the grooves 95 and 95, so that the outside spindle 39 and its knob 3l are again free to turn to operate the latch.

The cylindrical body 2li is attached to the door in which it is to be mounted by an attached clamping plate IIIJ on the outside, and a removable clamping plate III on the inside, these clamping plates being somewhat larger in diameter than the mounting hole in the door, so that the outer margins engage the faces of the door. The attached clamping plate III) is provided with a central opening through which the bearing sleeve 29 extends, and is also provided with a window I I2 through which the boss 34 for holding the hairpin spring 46 and retainer key 44 of the outside spindle 39 may pass. The clamping plate IIll is attached to the body by two or more long-headed screws II3, whose ends are riveted over washers IM on the outside of the clamping plate holes II5, the threads of the screws I I3 engaged threaded holes I I6 in the outside half portion 2I of the body, clamping plate screw bosses II'! being preferably provided on the end face of the outside body hall:` portion 2I. The elongated heads of the screws II3 extend through unthreaded holes I I8 in the inside body half portion 22 being operable by the screw driver slot in their heads, accessible from the inside end face of the body. A rosette I I9 is adapted to t over the clamping plate III) and frictionally engage it at the outer edges, the rosette having a nish hub IZl covering the .joint between the outside knob iinish hub 32 and the bearing sleeve 29.

The removable clamping plate I II is also provided with a central opening through which the inside bearing sleeve 36 extends, and is also provided with a window I2I through which the boss 42 for the retainer key M and its spring 46 may pass. The removable clamping plate III is attached to the face of the inside body half portion 22 by the screws I22 in the threaded holes I23, the heads of the screws holding the plate against the face of the door around the mounting hole. This arrangement of an adjustable attached clamping plate II@ and a removable clamping plate III each independently attached to the body 26 permits the equalization of the spindle lengths on the two sides of the door. The adjustment for diierent door thickness is made at the time of installation.

The advantages of my improved bathroom door knob latch set have been indicated inthe foregoing description. The rigid body and long bearing sleeves for the knob spindles provide a long-lived reliable locking and latching knob set, in which the knobs do not become loose and wobble. The locked latch bolt is released simply by turning the inside knob in either direction. The door cannot be accidently locked by unexpected closing. The emergency release from the outside is readily available, especially to release imprisoned children and others who are unable or unwilling to unlatch the lock.

I claim:

1. In a lock having an inner and an outer knob each having a separate tubular spindle with a rollback arranged to reciprocate a latch retractor by the turning of either knob, said inner knob having a push button, means actuatable by said push button for clogging the outer knob against rotation, said means comprising a locking sleeve attached to said push button,V said sleeve being disposed in both of said spindles and closely fitting the inside walls of said spindles, said locking sleeve being longitudinally movable by said 'i push button for clogging said outer spindle, said sleeve being cut away to a cylindrical segment in the portion adjacent said retractor and being provided with detent teeth adapted to releasably engage said latch retractor, whereby said locking sleeve is released by latch-retracting movement of said retractor and a lock tab disposed at the inner end of said sleeve adapted to be moved into position to dog said outside knob spindle when said sleeve is pushed inwardly by said push button.

2.v In a lock having an inner and an outer knob each having a separate tubular spindle with a rollback arranged to reciprocate a latch retractor by the turning of either knob, said inner knob having an axial push button, means actuatable by said push button for dogging the outer knob against rotation, said means comprising a. locking sleeve rotatably attached to said push button, said sleeve being non-rotatably disposed in both of said spindles and closely fitting the inside Walls of said spindles, said locking sleeve being longitudinally movable by said push button, said sleeve being cut away to a cylindrical segment in the portion adjacent said retractor and being provided with segment edges with detent teeth adapted to releasably engage said latch retractor, said retractor being provided with detent bosses co-acting withsaid teeth, whereby said locking sleeve is released by latch-retracting movement of said retractor and a lock tab disposed at the inner end of said sleeve adapted to be moved into position to dog said outside knob spindle when said sleevev is pushed inwardly by 1 said push button.

k3. In a lock having an inner and an outer knob each having a separate tubular spindle with a rollback arranged to reciprocate a latch retractor by the turning of either knob, said inner knob having a push button, means actuatable by said push button for dogging the outer knob against rotation, said means comprising a locking sleeve attached to said push button, said sleeve being disposed in both of said spindles and closely ntting the inside walls'of said spindles, said locking sleeve being longitudinally movable by said push button for dogging said outer spindle, said sleeve I and an emergency release shaft having a rollback at its end adjacent said retractor and said cut away portion of said locking sleeve, said release shaft being disposed inside said locking sleeve.

ROBERT C. CERF, JR.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Y Name Date 1,991,031 schlage Feb. 12, 1935 2,076,125 Grimsrud Apr. 6, 1937

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