US2813739A

US2813739A - Door lock

Info

Publication number: US2813739A
Authority: US
Inventors: Frank J Mcconnell
Original assignee: American Hardware Corp
Current assignee: Emhart Industries Inc
Priority date: 1955-06-06
Filing date: 1955-06-06
Publication date: 1957-11-19
Anticipated expiration: 1974-11-19

Description

Nov. 19, 1957 F. J. MocoNNELL 2,813,739

` DooR Loox Filed'dune e. 1955 2 sheets-snee*b 1 IN1. 4 6 V y 1x f INVENTOA /ZP/m//f J." /Vc CoA/fu Nov. 19, 1957 F. J. MGcoNNELL. 2,813,739

DOOR LOCK Filed June e, 1955 2 sheets-sheet 2 United States Patent i DOOR LOCK Frank I. McConnell, New Britain, Conn., asisignor to The American Hardware Corporation, New Britain, Conn., a corporation of Connecticut Application .lune 6, 1955, Serial No. 513,483

4 Claims. (Cl. 292-169) This invention relates to a door lock and more particularly to a door lock of the cylindrical type, and constitutes an improvement over the cylindrical door lock structure shown in my prior application, Serial No. 312,290, iiled September 30, 1953, and now abandoned.

The instant invention is embodied in the dogging mechanism of a cylindrical door lock which includes the basic operating unit disclosed in the co-pending application of Frank I. McConnell et al., Serial No. 508,018, led May 13, 1955; and which mechanism renders the lock particularly adapted for bedroom or bathroom doors. It will be understood, however, that the dogging mechanism disclosed herein can readily be used in other types of cylindrical door locks without departing from the scope of this invention.

The primary object of this invention is to provide an inexpensive dogging mechanism which is particularly adapted for use in the operating unit disclosed in said copending application.

A further object of the present invention is to provide a dogging bar for such a cylindrical lock having novel means thereon cooperating with means on the retractor of the lock for retaining the dogging bar in dogging position.

A still further object of the invention is to provide such adogging bar which is released from dogging position when the retractor is moved to its retracted position by operation of the inner door knob or by the latch bolt as it is depressed upon engagement with the strike.

More specifically, this invention is embodied in a ilat dogging bar which carries a spring clip that is adapted to engage a pin on the retractor of the operating unit t retain the dogging bar in dogging position.

Additional objects and advantages of this invention will be more clearly understood from the following de scription and the accompanying drawings in which:

Fig. l is a plan view of my improved'door lock, par#l tially in central horizontal section, illustrating the dogging means in normal undogging position.

Fig. 2 is a front view thereof, partially in vertical section, further illustrating the construction of the dogging means.

Fig. 3 is a sectional end view of the lock with the outer rose removed.

Fig. 4 is a sectional end view of the lock taken substantially on line 4-4 of Fig. 1.

Fig. 5 is a view similar to Fig. 1, but illustrating th dogging mechanism in dogging position.

Fig. 6 is an enlarged fragmentary front view illustrating a portion of the dogging bar and of the retractor of the lock and the spring clip which retains the dogging bar in dogging position. v

Fig. 7 is a fragmentary end View thereof taken on line 7--7 of Fig. 6.

Fig. 8 is a similar view taken on line 8 8 of Fig. 6. The cylindrical door lock disclosed herein is particularly adapted for use on bathroom and bedroom doors wherein it is usually required that means be provided for dogging the outer knobv of the lock againstoperation 2,813,739 Patented Nov. 19, 1957 rice from the outer side of the door; said dogging means being automatically Areleased when the inner knob is rotated, or, in lthe event that the dogging means had inadvertently been moved to dogging position while the door is open, upon depression of the retractor by the latch bolt as it engages the strike. In such locks, it is also usually necessary to provide means whereby the dogging mechanism may be released from the outer side of the door shouldv the person in the room be incapable of unlocking the door due to accident or illness.

It will be noted from the accompanying drawings that, with the exception of slight modifications and the inclusion of the dogging mechanism, the door latch operating unit disclosed therein is the same as that disclosed in the above mentioned co-pending application Serial No. 508,- 018. However, in order to permit a clear understanding of the operation of the dogging mechanism embodying the instant invention, the entire mechanism will be described herein.

The cylindrical door lock illustrated in Fig. l of the A drawings consists of an operating unit 5 and a latch unit 6 which are mounted on a door 7 in the conventional manner; said operating unit being received in a hole 8 bored through the face of the door, and the latch unit being received ina hole 9 bored into the edge of the door at right angles to and intersecting the hole 8. The latch unit is attached to the operating unit in a conventional manner whichwill be hereinafter described.

The operating unit 5 of the door lock comprises a cylindrical cup-shapedcasing 10 which houses and supv ports the operating mechanism and is provided at its inner end with an integral end wall 11 having a centrally located circular opening 12 therethrough, and at its opposite open end with prongs 13 which project longitudinally therefrom. The wall of the casing contains the conventional rectangular opening 10-a therethrough to the opposite edge portions of which the conventional ngers extending from the latch unit are attached in the usual manner as shown in Fig. 4. A cover plate 14 is secured to the outer open end of the casing 10 by the prongs 13 which project through aligned slots 15 in said cover plate and are peened over its outer surface to thereby rmly secure the plate against the end of the casing. The said cover plate has a centrally disposed opening 16 therethrough which is disposed coaxially with respect to the opening 12 in the end wall 11.

The casing contains a U-shaped retractor guide including a transversely curved base portion 17 from the upper and lower edges of which project centrally disposed parallel arms 18--18. The said retractor guide is disposed within the casing 10 with its base 17 resting against the cylindrical wall at the rear of the casing and its arms 18-18 extending forwardly towards the opening 10-a and lying equidistant from the longitudinal axis of the lock; said base portion being secured between the end wall 11 and the cover plate 14 in the manner clearly disclosed in said copending application Serial No. 508,018.

The free ends of said arms 18-18 are disposed in slots in a guide plate 19 that extends across the casing adjacent the opening 10-a and is secured between the end wall 11 and the cover plate 14 as also clearly disclosed i' in said co-pending application; said guide plate having forming the -rear end of the retractor, is slidably supegal-3,739

3 ported. A reinforcing plate 24 is disposed against the rear surface of the plate 21 and a centrally located notch 25 extends into both plates from their outer edges. For the purpose of the instant invention, a pin 26 is securedto thevbase of the retractor and projects perpendicularly in Fig. 4, to secure the said plates together and the lingersV to said plates. Said fingers extend` through and are guided in the opening in the guide plate 19, which provides a support for the forward endV of the retractor, and also extend through the opening -a in the wall of the casing. The outer ends of said fingers are bent inwardly, in the conventional manner, to permit engagement thereof with, the conventional retractor bar 28 which extends from the latch unit 6. It will be noted from Fig. 4 that the ends of theV retractor fingers 27-27 are received in notches 29-29 in the retractor bar 28 so that when the latch bolt 6-a, extending from the latch unit, is depressed, as by engagement with the strike, the retractor willmove rearwardly in unison therewith. The retractor is urged into its normal projected position by a spring 30 whichis disposed between the base 17 of the retractor guide and the plate 24 of the retractor, as clearly illustrated in Figs. 1 and 4.

The retractor actuating means carried at the inner and the outer sides of the casing of the door lockare the same as previously disclosed in my co-pending application Serial No. 312,291, filed September 30,- 1952, and now Patent No. 2,759,750, issued August 21, 1956. Said actuating means include elongated tubular bushings' 31-31 which are rotatably containedA in the openings 12 and 1'6 in the end wall 11 and the cover plate 14. Each of said bushings is provided withl radially extending iiangesY 32-32 and a projection 33 whicheng'age the surface adjacent thel hole in which the bushing is" mountedand prevent axial movement thereof outwardly` of the' casing. Each of said bushings also has ay segmental rollback portion 34 which extendsinto the casing and whose opposite edges engage the' plate 21 o'fthe retracto): and limit outward movement thereofto its? ntirr rial-position"l under the iniiuence of the spring` 30. The bushingsV 31-31 each contain a plurality of equallyv spaced slots 35 which extend thereinto substantially to the plane' ofv the outer surface of the member in which the bushing.v is mounted and said slots receive similarly' disposed lugs 36 on a retaining washer 37 which sulrro'undseachl of the bushings and abuts the outer surface of the member in which the bushing is mounted. The lugs 36 project through the slots 35 and into the bore of the bushing wherein they are engaged by the end of a tubular spindle, 38 and 39, respectively, which is telescopically received in the bore of its respective bushing and is secured therein with its inner end abutting the lugs 36 by being soldered, spot-welded, or otherwise fastened to the bushing. The outer tubular spindle 39 and its associated bushing 31 and retaining washer 37 contain aligned slots' 41, 42 and 43, respectively, which are normally aligned with a slot 44 in the cover plate 14 extending radially from the open'- ing 16 therein. The inner spindle, retaining washer and bushing also contain similar slots since they are the saine' parts that are used on the outer' side' of the lock, but said slots do not cooperate in any way with the clogging mechanism of the present invention.

The

tubular spindles

38 and 39 carry iniierand outer knobs 45 and 46, respectively, each of which has a shank portion which telescopically receives its respective spindle. The outer knob is permanently fastened to the outer spindle while the inner knob is detachably secured to its spindle by a depressible knobv catch;- Itwillt 4. be understood tha-t, when rotated, either of said knobs will rotate its respective bushing 31 through the tubular spindle to which it is secured and will urge the retractor rearwardly against the spring 30 to thereby retract the latch bolt 6-a.

The cover plate 14 has a decorative rose 47 permanently secured thereto and said rose projects outwardly from said cover plate to conceal the

slots

41, 42, 43 and 44, as clearly illustrated in Fig. 1.

A clamping plate 48 of conventional form is provided on the inner side of the lock and said plate is adjustable relatively to the outer cover plate 14' to permit installation of the lock on doors of different thicknesses. The operating unit is secured to a door by screws 49-49 which extend through holes in the clamping plate 48 and are threaded into holes in the casing 10. A rose 50, similar to the rose 47, is detachably secured to the clamping plate 48 to prov-ide the required decorative trim on the inner side of the lock.

The dogging means incorporated in the above described operating. unit for selectively clogging the outer knob against rotation comprise a one-piece clogging bar 51 which includes an outer section 51-a to the end of which is s'ccured a conventional pushbutton 52 that extends through an opening 53 in the wall of the inner knob. The outer section 51-a of said clogging bar is slidably supported axially of the inner tubular spindle by a disk 54 which is contained within said inner spindle and is positioned by oppositely disposed ears 55-55 extending radially inwardly from the wall thereof; said disk being retained against said ears, and the dogging bar being retained in' its normal undogging or projected position illustrated in Fig. l, by means of a compression spring 56 which is disposed between said disk and the base 52-a of the pushbutton.

The intermediate section of the dogging bar 51 contains a rstoffset portion S1-b which extends from the outer section ofthe bai' and is disposed forwardly of and substantially parallel theretoY and has oppositely disposed wings" 57-57 extending therefrom for a purpose to be hereinafter described.- The intermediate section of said portions of the barandl over the plate 21 of the retractor' between the retractor' fingers 27-27. It will be noted from Fig. 1 that the-rear surface of this portion of the flogging; bar is'sp'a'ced from the surface of' the plate 21 ofthe retractor overwhich it extends, and that said portion 51-c contains a longitudinal slot 59 through which the'pin 26 projects. The inner section 51-d of said bar is oliset rearwardly relatively to the intermediate portion 51-c thereof and extends closely adjacent the plate 21 of the'retracto'r and into the outer spindle 39. An integral supportngear 60 is bent perpendicularly from the bar and said ear slidably supports the outer end ofthe doggingl bar in the inner tubular spindle. It will be understoodv that said? ear lalso-prevents lateral movement of the inner end of the 'dogging bar. A blade 61 is secured to the dgging' bar adjacent its inner end and projects perpendicularly therefrom in the plane of the axis of the unit arid toward the rear of the casing. The blade is fastened to the dogging bar by a lug 62 which projects through a slot in said-bar and is peened over the edge of said slot. The edge of said blade adjacent the retractor passes through the slot 25 therein and said blade is provided with a nger'portio'n 63 that is disposed in alignment with the

slots

41, 42, 43 and 44. The said dogging bar is prevented from turning relatively to the operating unit by means of an extension 64 which extends from the finger 63 on the blade 61 into a slot 65 in the base portion 17 ofthe retractor guide. The blade is rigidly supported relatively to the clogging bar by a lug-66 which extends into a-slot 67 -in the ear 60, asillustrated in Figs. 1 andl 3.

The dogging bar carrie'sa spring clip 68A which coop# erates with the pin 26 'for yieldingly retaining said bar in dogging position. This spring clip is U-shaped in formand has leg portions'68-a-68-aextending from a resilient bight portion 68-b which is disposed against the forward surface of the portion 51-b of the dogging bar and against the wings 57-57. The bight portion is .disposed between a positioning lug 69, which is formed on the dogging bar to properly locate the spring clip thereon, and a tab 70 which is bent from the bar and over the bight portion; said tab also securing the spring clip to the bar. The' spring clip is disposed centrally of the bar and its legs extend from the bight portion toward the outer side of the lock in substantially parallel relation beyondthe sides of the dogging bar and converge behindr the portion 51-c thereof. Said legs are bent to provide oppositely disposed humps 71-71 which lie equi-distant from the center of the dogging bar and extend under the slot'59 therein outwardly of its inner end, said humps being normally spaced apart a distance less than the diameter of the pin `26 to form a restricted passage therebetween as illustrated in Fig. 2. Said legs then diverge from thehump portions 71-71 and are provided with parallel extensions 72-72 which extend beyond the pin 26 and on the opposite sides thereof.

The dogging bar is urged into its projected or undogging position by the compression spring 56, its movement to this position being limited by the engagement of the extension 64 on the blade 61 with the end 'of the slot 65. When the dogging bar is in its undogging position, the humps 71-71 on the spring clip are disposed outwardly of the pin 26 and the extensions 72-72 lie at the opposite sides of the pin and prevent movement of the spring clip out of alignment with the pin should the tab 70 fail to properly hold the spring clip.

It will be understood that when in its undogging position, the dogging bar will not interfere with the normal operation of the lock. The retractor can be retracted by rotation of the inner or the outer knob in either direction and as said retractor moves rearwardly, the pin will move out of the slot 59. Since the bar is located in its undogging position by engagement of the extension 64 with the end of the slot 65, said slot 59 in the dogging bar will always remain in alignment with the pin 26 and will receive said pin upon return of the retractor to its normal position.

When it is desired to dog the outer operating knob against operation, it is only necessary to depress the pushbutton. This will move the entire dogging bar 51 against the spring 56 and relatively to the pin 26 on the retractor and urge the dogging finger portion 63 on the blade 61 toward the

notches

41, 42, 43 and 44. As the humps 71--71 on the spring clip 68 engage the rounded surface of the pin 26, they will ride upwardly on said surface and the legs of the spring will move apart, and as the humps move past the pin, the legs of the spring will be urged together. When the outer end of the slot 59 in the dogging bar engages the pin 26, further movement ofthe dogging bar and pushbutton is prevented and the dogging bar is in dogging position as illustrated in Fig. 6. The humps are then disposed against the inner side of the pin and in engagement with its surface and thereby retain the dogging bar in dogging position against the force of the spring 56. When in dogging position, the dogging finger 63 will be disposed in the

slots

42, 43 and 44 and will thereby prevent rotation of the outer tubular bushing 31 and consequently of the outer knob 46.

It will be understood that the inner knob is still free to rotate to permit operation of the lock from the inner side of the door and, when the retractor is urged rearwardly upon operation of the inner knob, the pin 26 will be car ried rearwardly therewith and out of engagement with the humps 71-71 on the spring clip 68, which will release the dogging bar and permit the spring 56 to return said bar to its normal undogging position. It will also ybe understood that if the dogging bar has been'inadvertentlyf moved into dogging position while the door is open, the;

of the door.

If the person in the room has locked the door 'and is unable to unlock it due to illness or accident, the dogging bar may be released by inserting a suitable tool, such as a nail or a screw-driver, indicated at 73, through a centrally disposed hole 74 in the outer knob and into engagement with the ear 60 on the end of the dogging bar and then pushing said bar inwardly to force the humps 71-71 back over the pin 26 and thereby permit return of-the dogging bar to undogging position to permit operation'of the outer knob for opening the door.

The latch operating unit is supplied as a pre-assembled mechanism and to install it in a door, having the required holes 8 and 9 bored therein, requires only the removal of the inner knob 45, the inner rose 50 and the clamping plate 48. The latch unit is rst inserted into the hole 9 and is secured therein in the normal manner. The operat ing unit is then inserted into the hole 8 from they outer side of the door with the ends of the retractor fingers in position to enter the notches in the retractor bar 28 extending from the latch unit. The operating unit is moved through the hole until the cover plate 14 abuts the outer surface of the door. The inner clamping plate is then placed in position against the inner surface of the door and the screws 49-49 are threaded into the casing 10 and, when tightened, securely clamp the operating unit to the door. The inner rose 50 is then attached to the clamping plate and the inner knob is placed on the inner spindle to complete the installation.

It will be understood from the above description that my invention provides an inexpensive and durable door lock having a dogging mechanism which i's simple in operation, economical to produce and does not require complicated or numerous parts for its support or operation.

l claim:

1. A door lock comprising a casing, a retractor in said casing, a latch bolt adapted to be retracted by said retractor, inner and outer independently operable operating members for actuating said retractor, a longitudinally movable dogging bar extending through said casing adjacent a portion of said retractor, dogging means controlled by said bar for dogging said outer operating member against operation, spring means normally biasing said dogging means out of dogging relation with said outer operating member, means accessible from the inner side of the lock for moving said dogging bar into dogging position, a projection on said retractor, a spring clip carried by said bar and including one or more portions adapted to resili'- ently engage said projection when said dogging bar is moved int-o dogging position and to retain said bar in dogging position against the biasing force of said spring means, and emergency access means on the outer side of said lock for permitting an inwardly directed force to be placed on said dogging bar to overcome the resilient holding force of said spring clip whereby said dogging bar will be moved out of dogging position.

2. A door lock comprising a casing, a retractor in said casing, a latch bolt adapted to be retracted by said retractor, inner and outer independently operable operating members for actuating said retractor, a longitudinally movable dogging bar extending through said casing, dogging means controlled by said bar for dogging the outer operating member against operation, spring means normally biasing said dogging means out of dogging relation with said outer operating member, means accessible from the inner side of the lock for moving said dogging bar into dogging position, a 4U-shaped spring clip carried by said dogging bar and including a resilient bight portion which is tsex-nred to said bai` and a pair vof spaced forwardly extending legs, opposed portions of said legs extending into close proximity 'and providing a restricted passage therebetween, fand a projection on said retractor normally aligned with said passage and adapted to be engaged by said opposed portions of the legs upon movement -of said dogging bar` into dogging position to retain said bar in said-position against the biasing force of said spring means, and emergency access means on the outer vsicle of said lock for permitting an inwardly directed force to be placed on said clogging bar to overcome the resilient holding force of said spring clip whereby said dogging bar will be moved out of clogging position.

3. A door lock comprising a casing, a retractor in said casing, a latch bolt adapted to be retracted by said retractor, inner and outer independently operable operating members for operating said retractor, a clogging bar extending through said casing adjacent a portion of said retractor and movable longitudinally intov and out of dogging position, clogging means carried by said bar for dogging the outer operating member against operation, spring means normally biasing said dogging means out of dogging relation with said outer operating member, means accessible from the inner end of the lock for moving said dogging bar into dogging position, a pin projecting from said retractor through an elongated slot in said dogging b'ar, the inner end of said slot being engageable with said pin to limit movement of said bar to clogging position, a U-shaped spring clip having a resilient bight portion secured to said bar and spaced legs extending outwardly therefrom yand disposed at opposite sides of said pins, said legs having opposed humps thereon providing a restricted passage therebetween and being disposed adjacent the inner end of said slot, and emergency access means on the outer side of said lock for permitting an inwardly directed force to be placed on said dogging bar to overcome `the resilient holding force of said spring clip whereby said dogging bar Vwill'b'e moved out of dogging position.

'4. Adoor lock comprising 1a casing', a retractor in said cas'rig,l a latch bolt adapted- `to be retracted by said retractor, inner and outer independently operable operati-ng members for actuatingsaid retractor, a dogging bar extending through said casing adjacent a portion of said retractor and being longitudinally movable into and out of doggin'g position, lsaid bar having an elongated slot therein, a pin fastened to said retractor and projecting through said slot, 'the inner end of said slot being engageable with said p'in to'lprovide stop means for limiting movement of the bar to dog'ging position, spring means normally biasing said clogging means out of dogging relation with said outer operatingy member, means accessible from thefinner -side of the lock for moving said dogged bar into dgging position, resilient retaining means carried by said bar and engageable with said pin to retain the bar in dogging position against the biasing force of said rspring means, said pin being disposed between said retaining means and the end of said slot when said bar is in dogging position and preventing longitudinal movement thereof, and emergency access means on the outer side of vsaid-lock for permitting' an outwardly directed force tothe placed on said clogging bar to overcome the resilient holding force of said resilient retaining means whereby said clogging bar will be moved out of dogging position.

References Cited in the le of this patent UNITED STATES PATENTS `1,579,457 Schlag'e Apr. 6, 1926 2,038,907 seaijage Apr. 28, 1936 2,293,856 schlage Aug. 25, 1942 2,299,180 Schlge Oct. 20, 1942 2,435,238 Schlge f Feb. 3, 1948 2,611,635 Cerf Sept. 23, 1952