US2602318A - Lock mechanism - Google Patents

Description

July 8, 1952 F. BELAusTEGUlGol-HA 2,602,318

LOCK MECHANISM Filed July 13, 1949 4 Sheets-Sheet l IILII wm |rv| mm wv vmwm wk n @n :E: a n N n bmw@ mm mm am wm s oooom- Inventor wm mm may MZUS July 8, 1952 F. BELAusTEGulGolTlA 2,602,318

Loox MECHANISM Filed July 13, 1949 4 Sheets-S1169?l 2 WWII' Inventor Franc/sco Belausfeguigoif/a By me);

July 8 1952 F. BELAUsTx-:GuleolTlA 2,602,318

LOCK MECHANISM 4 Sheets-Sheet 5 Filed July 13, 1949 July 8, 1952 F. BELAUSTEGUIGO'ITIA LOCK MECHANISM Filed July 13, 1949 Inventor Franc/sw eauseguigofa Patented July 8, 1952 LOCK MECHANISM Francisco Belausteguigotia, Mexico City, Mexico 'Application July 13, 1949, Serial No. 104,504 In Mexico August 21, 17948 a claims. (c1. 704223) This invention relates to new and useful improvements and structural refinements in lock mechanisms, more specifically, door lock mechanisms, and the principal object of the invention is to facilitate locking of the door by a simple push on the inside door knob, whereby the lock mechanism cannot be actuated until the inside knob is pulled to its initial position, or until an appropriate key is inserted in the outside door knob and turned. i

This object is achieved by the provision of what may be called-a stationary tumbler plate formed with a polygonal opening to receiveaslidable latch actuating shaft which carries the inner and outer knob, the shaft having a polygonal cross-sectional configuration whichv is complementary to the opening in the tumbler plate and prevents the shaft from rotating until such time as the shaft is slid to a position wherein a crosssectionally reduced portion of the shaft is disposed in the tumbler plate opening and rotation ofthe shaft is facilitated.

An important feature of the invention thereforeresides in the above outlined arrangement of the tumbler plate and shaft which permits the mechanism to be locked. and unlocked by simply sliding thelatch actuating shaft.

Another feature of the invention involves the provision of a lock cylinder in the outside door knob together with means for operatively connecting this cylinder to the latch actuating shaft in such manner that rotation of the lock cylinder rst slides the shaft to its unlocked position and thereupon rotates the shaft so as to actuate the associated latch. Y

Some of the advantages of the invention reside in .its simplicity of construction, in its dependable operation, in its adaptability for use in associationY with doors of different sizes and thicknesses, and in its adaptability to economical manufacture.v

With the above more important objects and features in view, and such other objects and features as may become apparent as this specification proceeds, the invention consists essentially of the arrangement and construction of parts as illustrated in the accompanying drawings, in which:

Figure 1 is a cross-sectional View ofv the invention in situ on a door, the invention being shown in its unlocked position;

Figure 2 is a group perspective view of the lock cylinder, two cam members, a cam member connecting pin and a portion of the latch actuating shaft used in the invention;

VFigure 3 is a side elevational View, partially broken away, of the lock cylinder, together with one of the cam members and the cam member connecting pin, the cam .member and pin 'being illustrated in section;

rFigure 4 is a group illustration showing the second cammember in section and illustrating a portion of the latch actuating shaft in elevation;

Figure 5-is an elevational view of the latch actuating shaft per se;

Figure 6 is an end view of the cam member shown inFigure 2, this view being taken in a direction of the arrow 6 in that figure;

Figure 7 is a fragmentary elevational detail of the lock cylinder, cam members, shaft and tumbler plate in locked position;

Figure 8 is an elevational View, similar to that shown in Figure l'7, but illustrating the elements in their unlocked position; Y

Figure 9 is a cross-sectional view, taken sub'- stantially in the plane of the line 9 9 in Figure 1 but with the escutcheon plate removed;

Figure 10 is an elevationalvview showing the hub of the outside knob together with the key cylinder tumbler box;

Figures 11, 12 and 13 are schematic illustrations showing the progressive coaction between the cam member connecting pin and one of the cam members;

Figure 14 isa fragmentary sectional view, similar to that in Figure 1 but showing a lmodified embodiment of the invention in its lockedl position;

Figure 15 isa fragmentary sectional view, similar to that in Figure 14v and showing the modified embodiment inthe unlocking stage;

Figure-16 is a cross-sectional detail, taken substantially in the plane of the line IB-I 6 in Figure 14, and t Figure 1'7`is a group perspective view of the lock cylinder,cam members and shaft used in the modified embodiment.

Like characters of reference are employed to designate like parts inthe specification and throughout the several views.

Referring now to the accompanying drawings in detail, the invention consists of a lock mechanismdesignated generally by the reference character 20, the same being associated with a door 22 provided for that purpose with a transverse bore 24 and equipped with a latch 26 of any conventional type. This latch includes the usual projectible and retractible tongue which is actuated by a rotatable shaft or spindle 28 extending centrally through the bore 24 and being formed in one end portion thereof with a row of apertures 36 to selectively receive a set screw 32 provided in the hub 64 of an inside door knob 36, whereby the hub is adjustably secured to the 28 as will be clearly apparent.

An escutcheon plate 38 is secured to the inner surface of the door 22 by a set of transversely extending screws 46 and is provided with a central opening whereby a socket v42,1nay be `secured thereto as at 44. The hub 34 vis partially covered by a rotatable shield 46 which obscures the set screw 32 from View, this shield constituting a continuation of the knob 36 as is best shown in Figure 1. However, an aperture A4l is provided in the shield 46 so that ,accessto the screw 32 may be had, but this aperture normally is not in register with the screw, so .ithat'the shield prevents the possibility of the screw ibecoming accidentally displaced from the hub 43.4. A cylindrical portion oi .the shield 46 is 'formed with an inturned flange 48 which abuts an annular 'step provided on the -lhub l34, Aand rthe hub together with the cylindrical portion 'of lthe shield are slidable in a bore or recess 5|) with which the socket 42 is provided. Theextent of sliding movement of the hub -34 in the outward direction is limited by a keeper ring 52 with which the hub is equipped and which isengageable with the inner portion of the 4socket v42 which is secured to the escutcheon plate e38, as shown in Figure 1. On the other hand, inward sliding of the 4hub 34 in the bore '50 is restricted by the 'flange I43 of the shield y46 coming-in vcon-- tact with the end surface `52 `of the recess'50 of the -socket 42, aswill -be `clearly apparent. It is to :be noted that the Ybore v24 Yof the door 22 is suiciently large to kfreely receive the cylindrical inner end portion o thehub 34 and the keeper ring 52 when the-knob 35 is pushed in the direction of the arrow 54.

The aforementioned screws -48 also securein position a tumbler plate -56 disposed at the outer surface o'f 'the ldoor 22, this tumbler plate being formed with a polygonal `opening' 58 which is adapted to slidably receivethe shaft 2-8`,1the latter being of a polygonal cross-sectional coniig-uration so that when it is vdisposed vin AYthe opening .58,rotationvof the shaft 28 is not possible. (See Figure 7.) However, the shaftE-B is for-med 1intermediate the ends thereof with la Vdia'metricals.

ly reduced portion V6|?, preferably circular in cross-section, and when this -diametrically -reduced portion of the shaft is disposed in the opening 58 of the tumbler plate 58, the shaft A28 is free to rotate, las will be clearly apparent. (See Figures 1 and8;) v Y I .It will be .apparent `from vthe foregoing that when the mechanismshown in Figure r1' is actuated by vforcing the inside knob 36 in fthe direction .of the arrow 54 so that the polygonal'cross section of the shaft v26 engages the 'opening y58 (see Figure 7) the shaftg28 cannotl berotated 'and actuation of the latch 28 will be impossible until the knob 3,6.isgpulle'd .outwardlyrin the vdirection of the arrow '62. In `this manner, lafter the 'lock mechanism is locked from the inside Aof `.the door, opening or unlocking thereof'will ybepossible only from the inside, unless an appropriate key is inserted in a conventional lock cylinder unit 64 provided in an outside door knob-66.

This knob is mounted upon'a screw-threaded portiont of a hub ST6 which, in turn,is formed with -a polygonal bore "I2 to receive :a portion T4 of the aforementionedshaft 2B, the hub .10 being covered bya suitable shieldlb` which constitutes a continuation of the knob 66, substantially as shown. It is to be noted that the hub 10 is rotatable but not slidable in a tubular bearing portion 'I8 of an escutcheon plate 8D, the marginal edges of which are angulated around and under the tumbler plate 56 as shown at 82, whereby the escutcheon plate is rmly secured in position by the aforementioned bolts 4).

The -hub f1.0 rcarries a vvlock cylinder tumbler box p84 which cooperates ,with the lock cylinder or barrel unit y64 in the conventional manner, and it is to be noted that the hub 'l0 is formed with a cylindrical bore or recess 86 to receive a pair-of coacting cam members 88, 90.

The hub .1.6 -is also provided with an annular step or shoulder which is covered by an inturned flange 4$2 Vformed integrally with the shield 16, the vflange 92 abutting the escutcheon plate 86 and asuitable keeper ring 94 being provided on the hub 1D inside the escutcheon plate 8|), whereby longitudinal sliding or shifting movement of `the Yhub 'T6 and outside knob '66 is 'prevented. A

Since the .diametrically reduced portion l68 of 'the shaft 42|! "must tbe ldisposed in a predetermined position relative 1to the tumbler plate 56 Yand since lthe hub y"Hl 4and Aoutside `knob Y|56 are not slidabl-e, the aforementioned apertures 3D provided in the shaft 28 coact with `the set screw 32 of the vhub 34 ofthe inside `knob 36 in permitting the mechanismy to be adjusted for doors of diierent thicknesses, which adjustment is `facilitated by Isimply lvarying the position of the hub 34 Vonfthe `shaft 28, aswill be clearly understood. v

The shaft 28 ,is `slidable but non-'rotatable in the latch mechanism 26, while the aforementioned ca-m ymember Y9|) Vis provided with la circular bore '96 Vto receive "a cylindrical lend portion 98 of ,the lshaft y218, onwhich it is rigidly'secured by means of `a pin |00 lwhich Vextends through ya transverse bore |02 provided in the cammember 98 and engages a groove `L|64 formed 'in the shaft portion 98. (See Figures 2H Iand 4.) y'When the member L9i) is installed on 'thefshaft vend portion 98, `the bore [82 `is'dri'lled so as to result in the formation of the grooveclil, whereupon the pin |00 is pressedin .thebore' 02' to rmly secure the member 81B on the shaft portion 98.

'Theaforementioned cam member 88 is secured by means of a transversely .extending pin or screw |66 to `a tubular extension or adapter |08 provided on the lockcylinder 64, and apin V||6 operatively connects the two vcammernbers 88 9.0 as will be presently described. The pin |.|0 is equipped with a rounded Vhead, ldisposed in the aforementioned .adapter |08 ofthe lock cylinder 64 (see Figure 3) Yand a stepped iange v| |4is mounted on the pin I |0 immediately adjacent ythe head'i |2. The flange ||.4 is formed 'integrally with an outwardly projecting radial lug `|'|`6 which is engageable with an inwardly projecting radial .lug 'H8 provided `inthe cam member 83, and it is to be noted that the pin |10 is polygonal in cross section .and is slidably receivable in a polygonal .portion llfi'of the bore 96 of the cam member 90.

Finally, it is to 'be noted that the cam members 88, 86 are formed with coasting, substantially triangular lobes |22, |24, respectively,. sothat when one of the cam members vremains stationary while the second-member is rotated, the klobes |22, V|24 slide the cam members apart.

It should be understood that when the lkey is removed 'from the lock cylinder -64 the lobes |22,

l sequently,

|24 of the two cam members are so disposed that the cam Ymember 90 together` with the Vshaft 28 and the inside knob 36 may be slid vin the direction of the arrow 54, inwhich position the rotation of the shaft'and actuation'o'f the latch 26 is prevented by the tumbler plate 56. The mechani'sm under such .circumstances is in its locked position .and may be unlocked by eitherp'ulling the knob "36 in the directioniof the arrow 62 or inserting an appropriate key in the lock: cylinder 64. In the latter .instancetr'otation of the key'in the directionof the-arrows.|26 in Figures 11, 12 and 13 will rotate the lock cylinder 64 and the cam member 88 so that theflobe |22 of the latter will engage the lobe |24 of the tcam member 80 and will slide the cam member 9|), without rotating, in the direction of the arrow 62, thus placing the diametrically reduced portion 60 of the shaft 28 in the opening 58 of the tumbler plate 56 and facilitating subsequent actuation of the latch 26.

It should be understood that the flange ||4 of the pin I I is rotatably disposed in the cam member 88 as indicated at |28 in Figure 3, this being so arranged that rotation of the lock cylinder 64 and of the cam member 88 may be effected during an initial period without rotating the pin H0. In other words, the lock cylinder 64 and the cam member 88 may be rotated from the position shown in Figure 11 to the position shown in Figure 12 through a distance of almost 360 degrees, until the lug I8 of the cam member engages the lug ||6 of the flange H4. As has been already explained, during this initial rotation of the lock cylinder 64 the cam members 88, 90 shift the shaft 28 to its unlocked position, that is, from the locked position shown in Figure '1 to the unlocked position shown in Figure 8, whereupon further rotation of the lock cylinder 64 in the direction of the arrow |26 will be transmitted through the medium of the lugs I|8, ||6 to produce rotation of the polygonal pin H0, and conof the cam member 98 together with the shaft 28, thus actuating the latch 26.

Needless to say, after the door has been unlocked and opened, the key may be withdrawn from the lock cylinder 64 and the mechanism will remain in its unlocked position until it is again locked by sliding the shaft 28 in the direction of the arrow 54.

If desired, the portion '|4 of the shaft 28 and the bore 12 of the hub 10 may be circular in cross section so that the hub together with the knob 66 are freely rotatable on the shaft, the unlocking action being effected solely by inserting a key into the lock cylinder 64 and rotating the latter, as will be clearly apparent.

Referring now to the modified embodiment of the invention illustrated in the accompanying Figures 14-17, inclusively, this embodiment is similar to that already described, but is much simpler in construction, thus affording convenience and economy in manufacture.

In the modified embodiment the aforementioned pin I8 is eliminated and the coacting cam members 88, 90 are substituted by a pair of relatively simpler members |40, |42.

The outer end portion 14 of the latch actuating shaft 28 extends through the polygonal bore 12 of the hub into the recess 86 of the hub, in which .recess the cam member |42 is slidably positioned on the shaft portion '|4. That is to say, the member |42 is slidable longitudinally in the recess 86, but is rigidly secured to the shaft 28.

conventional'lock cylinder barrel 64. The lat"- te'r,=fin.turn, is' rotatably positioned in a, Hcylindrical jacketf|48 carrying the tumbler box |50. This tumbler box is secured in any suitable manner to"v the hub "(0, and it will be'apparent from -theffor'egoin'gv that when a key |52 is inserted'in the barrel 64, the lattermay be rotated in the jacket# 48 'thus rotating: the 'cam member |48 and causing the latter' toslide the cam 'member |`42 andthe shaft28l to the' unlocked position of the'latter, as'shown inFigure 15. 'Thereupon rotation of the knob66 will rotate the shaftV 28 by virtue of thepoly'gonalbore 12 in the hub 10 through which the shaft portion '|4 extends.

It is to be noted that the keeper pin or screw |44 extends transversely of the key receiving slot |54 in the barrel 64, thus preventing the possibility of a wire or a similar implement being inserted through the slot |54 into the recess 86 to effect unauthorized sliding of the shaft 28 to its unlocked position.

1n order to limit the extent of rotation of the barrel 64 relative to the sleeve |48, a stop dog or protuberance |56 is provided on the cam member |48 and is movable in an arcuate cut away portion or notch |58 with which the sleeve |48 is equipped.

The dog |56 is engageable with the end walls of the notch |58 and thus not only effectively restricts the extent of rotation of the barrel 64, but provides assurance that the barrel and the key can be turned in only one direction during the unlocking operation.

It is believed that the advantages and use of the invention will be readily understood from the foregoing disclosure and, accordingly, further description thereof at this point is deemed unnecessary.

While in the foregoing there has been shown and described the preferred embodiment of this invention it is to be understood that minor changes in the details of construction, combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

Having described the claimed as new is:

1. In a lock mechanism, the combination of a latch actuating shaft slidable from a non-rotatable locked position to a rotatable unlocked position, said shaft having inner and outer ends, an inside knob secured to the inner end portion of said shaft for sliding and rotation therewith, a non-slidable outside knob positioned on the outer end. portion of said shaft, a rotatable lock cylinder unit provided in said outside knob, a first cam member disposed in the outside knob and connected to said lock cylinder unit for rotation therewith, a second cam member secured to the outer end portion of said shaft in the outside knob and engageable with the first cam member whereby the second cam member and said shaft may be slid inwardly to its unlocked position when the lock cylinder unit is rotated, and means for transmitting rotation from the rst cam member to the second cam member when said shaft is in its unlocked position, said means being inoperative when the shaft is slid outwardly.

2. The device as defined in claim 1 wherein said second cam member is provided with a polygonal bore, said means comprising a pin rotatably invention, what is mounted in said rst cam member and having a polygonal vshank. lslidalole vv.but -loon-Ivatatahle in said bore, an outwardly projecting lug Provided 'on said pin, and `n limvardly projecting lug provided on the first Vcam member and adapted :for

driving engagement With-'the outwardly projecting lug when v-ssnd shaft is Ain its unlocked position.

V3. The Adevice :as -dened in claim y1 together v`with ian outside hub'havi-ng saidou-tside knob se- `curedthereto and provided with 'a polygonal'bore, :at leastafportion of said sha-ft being Vpolygonal and lslidably but non-rotatably disposed in Isaid bore,jwhereby the iknob mary impart rotation to the shaft only when the latter is in Vits unlocked position. y FRANCISCO BELAUSTEGUIGOITIA.

REFERENGES CITED The following references are of record in the le uof vthis patent:

UNITED STATES PATENTS Number vName Date 655,605 'Churchill Aug. '1, 1900 1,387,888 Holt Aug. f16, 1921 1,686,406 l :Caplan Oct. 2, 1928 l=1,940`;0l`8 -1Ryn1ervf k 1 Dec. v19,` 1,933 22,484,961 Russell et a;1 Oct. 18, 1949 FOREIGN PATENTS '-N-umber Country Date 7,045 Great Britain Apr. 5, 1893

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