US1999311A - Doorlock - Google Patents

Description

DooRLocK Filed Nov. l, 1935 2 Sheets-Sheet l April A30, 1935. H. G. volGHT 1,999,311

DOORLOCK Filed Nov. 1, 1933 2 Sheets-Sheet 2 Y IZ 0I3737 Patented Apr. 30, 1935 UNITED STATES PATENT OFFICE DOORLOCK Application November 1, 1933, Serial No. 696,240

6 Claims.

This invention relates to door locks and more particularly to locks of the so-called "unit type in which the entire lock mechanism is assembled before being placed upon the door and is thereafter inserted in a slot or cutout provided in the edge of the door in assembled condition.

One of the objections to such locks has been that they are relatively expensive and have, therefore, been used mainly in oflices and other public buildings wherein relatively heavy and expensive hardware is employed. v

One object of the present invention is the provision of a lock of this character which will be provided with all the advantageous features of more expensive locks and will at-the same time be susceptible of being manufactured at a relatively low cost.

A further object of the invention is the provision of a lock of this character of simple and compact form which may be manufactured at a comparatively low cost and be of relatively light weight and moderate size.

A still further object of the invention is the provision of a lock of this character so constructed that it will possess certain manufacturing advantages that enable it to be made at a relatively low cost.

A still further object of the invention is the provision of a new and improved dogging mechanism for the lock bolt, which is mounted in one of the lock knobs.

To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the drawings:

Fig. 1 is a front elevational view of the inside of a door having my improvedv lock applied thereto;

Fig. 2 is an edge view of the door and lock;

Fig. 3 is a view of the lock with the case cover removed to show the interior mechanism;

Fig. 4 is a rear view of the lock with a part of the case removed;

Fig. 5 is a transverse sectional view on line 5-5 of Fig. l;

Fig. 6 is a longitudinal sectional view on line 6-6 of Fig. 2; and

Fig, 'l is an enlarged sectional view of the knob Shanks and associated mechanism taken on line 1-1 of Fig. 6.

To illustrate a preferred embodiment of my invention, I have shown a lock designated generally by the numeral ID mounted upon a door II. It will be understood that this lock is of the so-called unit lock type and is, as shown in Figs. 5 and 6,

mounted or inserted in a slot or recess I2 cut through the edge of the door, the edges of the opening being concealed by inner and outer escutcheonuplates I3 and |4 which are of larger dimension than the lock case which is received snugly in the slot |2.

The lock case proper comprises a base plate I5 having a front or face plate I6 formed integrally therewith. This front plate I6 is, as shown, of greater width than the depth of the lock case, so that the lock may be used with doors of varying thicknesses.' A cover plate I1 is secured to the base plate by means of screws I8 inserted into hollow threaded posts I9 secured to the plate I5. One side of the case between the plates |5 and I1 is closed by the front plate I6, and the other three sides are closed by a U-shaped cover plate 20 which is preferably made of thin resilient material to snap into place about the lock and protect the interior parts. 'I'his U-shaped part may be freely removed when the lock is dismounted from the door. Adjacent the face plate, side members 2| and 22 are secured to the part I5 and are provided with upstanding lugs 23 and 24 which are received in notches inthe cover plate I.1 to assist in positioning the latter.

The escutcheon plate I4 is secured to the plate I5 by screws 25 entering the threaded bosses 26 secured to the escutcheon plate I4, while the escutcheon plate I3 is secured to the case by means of screws 21 entering the threaded posts 28 secured to the plate I4. It will be understood vthat the screws 21 as well as the threaded posts 28 are of sufficient length to provide for considerable adjustment of the escutcheon plate I3 relatively to the plate I5 so that the lock may be accommodated to doors of various thicknesses. These screws pass through notches or openings (not shown) in the cover plate I1.

As shown more'particularly in Figs. 3 and 6, the lock is provided with a reciprocable latch bolt 3|) having a stem 3|, surrounding which is a spring 32 acting between the head of the latch bolt and an upstanding member 33 secured to the plate I5, in which the stem 3| is sldably mounted. It will be obvious that the spring 32 tends to urge the latch bolt 30 to protracted position. The extreme rear yend of the stem 3| is also sldably mounted in a depending portion 34 of a yoke 35, a washer 36 on the rear end of the stem engaging the member 34 to limit the movement of the stem through the yoke member in one direction. It will be apparent that when the yoke is moved rearwardly in the lock, the bolt will be retracted.

The yoke is provided with spaced arms 31 and 38, upon the ends of which are depending lugs 39 and 46 which terminate in tongues 4I and 42 slidably received in openings 43 and 44 in the plate I5. Upon the arms 31 and 38 are provided upstanding guides 45 and 46 which engage the plate I1. It will be seen, therefore, that the yoke will be properly guided in its reciprocating movements by these upstanding guides which engage the cover plate I1, and by the lower ends of the depending lugs 39 and 46 which engage and slide upon the opposite plate I5. Also mounted upon the yoke is a post 41 against which acts one end of a spring 48 coiled about a post 49 secured to the plate I5, the other end of which bears against a post 56 secured to the same plate. The guide post 41 also engages the plate I1, as shown more especially in Fig. `6, and assists in maintaining the yoke in its proper position in the lock. It may also be observed that while the spring 32 alone serves to move the bolt to protracted position, both this spring and the spring 46 assist in moving the yoke forward or in the position in which the bolt is protracted after the retraction of the bolt and yoke by the rollbacks, as will be hereinafter described.

Formed integrally with the plates I5 and I1 are bearing sleeves 5I and 52 serving as elongated cylindrical bearings for the knob Shanks 53 and 54, upon which are secured the knobs 55 and 56, 56 in this instance being the knob mounted upon the inner side of the door. These bearing sleeves may be conveniently made integrally with the plates I5 and I1 by a die-casting operation,

'I'he knob Shanks 53 and 54 are provided with annular grooves 51 and 58, into which project the ends of L- shaped clips 59 and 60 secured by screws 6I, or the like, to lugs 62 formed on the plates I5 and I1. The ends of these clips project through slots formed in the bearing sleeves 5I and 52 for this purpose. The engagement of these clips with the knob shanks holds the knob against longitudinal movement within the sleeves while permitting free rotary movement of the knob Shanks, and the sleeves provide elongated bearing surfaces for the knobs, thus providing for their proper operation and eliminating any tendency they might have to bind when turned.

Within the knob 56 is mounted a lock 65, which may be an ordinary pin tumbler lock having a key barrel 66. Secured to the end of the key barrel is a hollow sleeve-like member 61 provided with a non-circular opening 68 in which is nonrotatably but slidably mounted a similarly shaped spindle 69. Upon the inner end of this `spindle is a rollback 16 having an extended hub 1I I'his hub is reduced at its end portions and upon these reduced portions are rotatably mounted additional rollbacks 12 and 13. It will be observed that the rollback 16 will be turned by rotation of the spindle 69, which may be rotated by the rotation of the key barrel 66 independently of the knob 55, or which will be rotated with this knob when the key barrel is locked thereto.

'I'he inner ends of the knob shanks 53 and 54 are slotted at diametrically opposed points, as shown at 15 and 16 to engage the rollbacks 12 and 13, respectively, so that these rollbacks will be operated when the respective knob is turned. Also, the ends of the knob shanks are slightly counterbored to receive the hubs of the adjacent rollbacks, so that the rollback assembly, consisting of the rollbacks 16, 12 and 13, is supported by, or may be said to be suspended between, the inner ends of the knob shanks. This support permits the rollback assembly to be moved to a slight extent longitudinally of the knob Shanks, or to the right or left, as shown in Fig. 7, for a purpose to'be described hereinafter.

In locks of this character it is advantageous to provide for the dogging of the outside knob, or the dogging of the mechanism operated by the outside knob, so that the door mayv not be opened from the outside except by means of a key. This dog has usually been mounted in the front edge of the lock, or the front plate, which is plate I6 of the present structure. In order,

however, to reduce the size of the lock, I have provided the dogging mechanism in the inside knob, as will now be described.

Rotatably mounted in the knob shank 54 and knob 56 is a stem 11 which projects through the knob 56 and is provided upon its projecting end with a finger piece 11 by which it may be operated. A pin 18 is inserted through an opening in this rod, which pin lies in a transverse slot 19 in the knob shank 54, so that while the stem 11 is permitted a limited rotative movement, it is prevented from moving longitudinally within the knob shank. Upon the end of the stem 11 is a V-shaped cam member 66 which cooperates with a correspondingly shaped slot 8| in the end-of a plunger 62, also mounted in the bore of the knob shank 54. A pin 63 is passed through this plunger and through a longitudinal slot 84 in the knob shank so that the plunger is prevented from rotating but is permitted a limited longitudinal movement. This plunger extends inwardly into the counterbore in the end of the shank 54 and abuts the hub 1I of the rollback 16. It will be seen, therefore, that when the stem 11 is rotated the cam 66 will ride out of the slot in the plunger 62 and cause this plunger to move to the right, as shown in Figs. 6 and 7. This will effect a movement of the rollback assembly to the right, as shown in these figures, and cause the rollback 12 to move into a slot 86 formed in an inwardly extending sleeve 81 upon the plate I5. This sleeve may be considered a continuation of the sleeve 5I. When the rollback 12 is engaged in this slot it will be held against movement, and as this rollback is the one operated by the outside knob and is engaged with the knob shank, both it and the knob shank will be prevented from turning. It will be understood, however, that at this time the keymay be used to rotate the key barrel and the spindle 69, which will effect rotation of the rollback 16 independently of the outside knob and rollback 12. The outside knob will, therefore, be effectively dogged, while at the same time the lock may be operated by the proper key.

When the stem 11 is returned to its original position the cam member 86 will be aligned with the groove 8|. It is necessary, however, to provide some means to move the rollback assembly and the plunger 62 to the left, as shown in Fig. 7, in order to free the outside knob. For this purpose I provide within the knob shank 53 a spring 88 which acts against the extension 61 of the key barrel at one end, and at the other end acts against a washer 89 which abuts one end of the hub 1I of the rollback assembly and also the hub of the rollback 12. Therefore, whenever the rollback assembly is not positively held in its right-hand position, as shown in Fig. 6, by the cam member 66, it will be urged to the left by this spring. This will also move the plunger 82 to the left so that the cam member 80 will rest within the groove 8| in the plunger.

It will be understood that the rollbacks 10, 12 and 13 are each provided with double arms, that is, arms extending in each direction from the respectivo hubs, and that these arms will engage the depending lugs 39 and 40 on the ends of the arms 31 and 38 of the yoke 35, so that the yoke will be moved rearwardly or in a direction to retract the latch bolt whenever any one of these rollbacks is operated and regardless of the direction in which it is operated. It Will also be understood that when the rollback assembly is moved to the right, the rollback 13 is still engaged in the notches in the ends of the knob shank 54 so that this rollback will always be operable by the inside knob. Likewise, when the rollback assembly is moved toward the left by the spring 88, the rollback 12, while it will be moved out of the notches 86 on the sleeve member secured'to the case, will still lie within the notches in the end of the shank 53 so that it will be operable by the outside knob.

It is also desirable in locks of this character to provide a latch dog operable by a plunger in the face plate of the door to dog the latch bolt against being `forced back or jimmied by a tool inserted between the face plate of the lock and the strike plate secured to the door jam. For

this purpose I have provided a dogging lever 90 pivotally mounted on a post 9| secured to the plate |5. A spring 92 surrounding this post acts upon a lug 93 on this lever to normally urge the end of the clogging lever upwardly, as shown in Fig. 3, to a'position behind the latch bolt 30. A clogging plunger 94 projects through the face plate of the lock and is carried by a stem 95 which is slidably mounted in an upstanding plate 96 secured to the plate I5. A spring 91 acts against this plate and against the plunger 94 to maintain the latter in protracted position. The stem 95 projects through the plate 96 and carries upon its rear end a lug 98 having a finger 99 engaging the part 93 of the clogging lever 90 to move the latter to a position free of the latch bolt 30. It will be understood that when the door is in open position the spring 91 will protract the plunger 94 and cause the finger 99 to move the dogging lever 90 against the tension of its spring 92 to a position in which it clears the latch bolt 30 and permits free retraction of the latter. When the door is closed, however, the plunger 94 is retracted by contact with the door strike, thus removing the nger 99 from engagement with the part 93, at which time the spring 92 will cause the dogging lever to move upwardly behind the bolt 30.

Upon the yoke 35 is a post |00 engaging in a recess in the tail |02 of the clogging lever 90. When the yoke 35 is moved rearwardly. as it will be by any one of the rollbacks, this post |00 acting upon the edge of the recess or notch |0| will move the dogging lever 90 downwardly against the tension of the spring so as to free the latch bolt and permit retraction thereof by any of the rollbacks. It is believed that the operation of the lock will be suiciently understood from the foregoing description without further explanation of its operation.

While I have shown and described a preferred embodiment of my invention. it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation Within the spirit of the invention and within the scope of the appended claims.

What I claim is:

l. A door lock having a case and a latch bolt movably mounted therein, a pair of knobs, one upon each side of the door to operate the latch bolt, said knobs having shanks thereon projecting into the case and having their inner ends in spaced relation, a rollback assembly mounted between said shank ends comprising a central rollback having laterally projecting hub members, an additional rollback rotatably mounted on each of said hub members, the adjacent ends of said knob shanks being counterbored, said hub members having bearings therein whereby the rollback assembly is suspended between the knob shanks, said rollback assembly being mounted for movement longitudinally of said knob shanks, and means abutting one of said rollbacks for moving said rollback assembly.

2. A door lock comprising a casing, a knob lshank rotatably mounted at each side of the casing, said shanks projecting into the casing and having their inner ends in spaced relation, a rollback assembly mounted between the shank ends and comprising a central rollback and an end rollback on each side of the central rollback, a lock-operated spindle in one of said shanks extending into, and slidably connected with, said central rollback to operate the same, and a plunger mounted in the other shank for longitudinal movement and abutting the adjacent rollback to move said rollback assembly when said plunger is moved.

3. A door lock comprising a casing, a knob shank rotatably mounted at each side of thc casing, said Shanks projecting into the casing and having their inner ends in spaced relation, a rollback assembly mounted between the shank ends and comprising a central rollback and an end rollback on each side of the central rollback, a lock-operated spindle in one of said Shanks extending into said central rollback to operate the same, a plunger mounted in the other shank for longitudinal movement and abutting the adjacent rollback to move said rollback assembly when said plunger is moved, and a stem rotatably mounted in said last-named shank to move said plunger longitudinally when the same is rotated.

4. A door lock comprising a casing, a knob shank rotatably mounted at each side of the casing, said Shanks projecting into the casing and having their inner ends in spaced relation, a rollback assembly mounted between the shank ends and comprising a central rollback and an end rollback on each side of the central rollback, a lockoperated spindle in one of said shanks extending into said central rollback to operate the same, a plunger mounted in the other shank for longitudinal movement and abutting the adjacent rollback to move said rollback assembly when said plunger is moved, and means projecting from said knob shank to move said plunger.

5. A door lock comprising a casing, a knob shank rotatably mounted at each side of the casing and having their inner ends extending into the casing and disposed in spaced relation, a knob on each shank, a rollback mechanism mounted between the inner ends of said Shanks, said mechanism comprising a central rollback having laterally projecting hubs extending into the shank ends, an end rollback rotatably mounted on each of said hubs, a lock-operated spindle in one of said Shanks, said spindle being slidably and non-rotatably engaged with said central rollback, and a plunger mounted in the other shank ing into the shank ends, an end rollback rotatably mounted on each of said hubs, a lock-operated spindle in one of said Shanks, said spindle being slidably and non-rotatably engaged with said central rollback, said end rollbacks being engaged with the knob Shanks to be operated thereby, and means in the other-knob shank to move said rollback mechanism longitudinally ot the shanks.

HENRY G. voIeH'r.

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