US2380708A - Door lock - Google Patents

Description

y w. R. SCHLAGE ET AL 2,330,703

' DOOR LOCK Filed July 12', 1945 5 Sheets-Sheet l y 1945- w. R. S'CHLAGE ET AL 2,380,708

DOOR LOCK Fiied July 12, 1945 s Sheets-Sheet 2 ATTORN y 31, 1945- w. R. SCHLAGE ET AL I 2,380,708

" DOOR LOCK Filed July 12, 1945 3 Sheets-sheet 3 INV NTORS.

ATTO E'x Patented July 31', 19 45 DOOR LOCK Walter B. Schlage, Enrlingame, and Ward R. Hahir, San Mateo, Calm, assignors to Schlage Lock Company, San Francisco, Calif. Application July 12, 1943, Serial No. 494,296

1 Claim.

This invention relates to a door lock, and especially that type known as a rim lock latch in which a sliding latch or bolt is operated from the inside by a knob or handle, and from the outside by means of a key.

The object of the invention is to generally improve and simplify the construction and operation of locks of the character described; to provide a lock in which comparatively few parts are required, and which combine to produce a durable longlived structure; to provide a lock in which practically all parts including the housing may be made from sheet steel or other sheet metal by punch press operation, and in which the latch or bolt together with the retractor plate is made as a single unit assembled from laminated to provide a combined latch bolt and a retractor plate which is recessed on opposite sides to receive the actuating mechanism, thereby permitting a compact space saving assembly of parts; and, further, to provide means for dead locking the latch bolt in projected and retracted position.

The lock is shown by way of illustration in the accompanying drawings, in which:

Fig. 1 is a side elevation of the door lock looking from the inner face thereoi and showing the base plate removed, saidview also showing the latch bolt in retracted position;

Fig. 2 is a view similar to Fig. 1' but it is partially broken away, and different from Fig. 1 in showing the rollback member I! in a position Referring to the drawings in detail, and particularly Fig. 12, A indicatesthe housing of a rim lock which is provided with a face plate B, said plate and housing being secured to the face and edge of a door by screws such as indicated at 2 and 3. Formed in the face plate is an opening 4 which serves as a guide and support for a latch bolt C, and formed integral with saidbolt is a retractor plate Din which is formed a longitudinally extending slot 1.

The retractor plate and bolt is'in this instance laminated in structure as it is formed of four plates indicated at ii, 9, ill and I i, which may be riveted, spot welded or\ otherwise secured together. The plates 9 and II are extended to form the retractor plate -D and the inner end of plate where it has raised the deadlocking member out of engagement with the deadlocking lug;

Fig. 3 is a view similar to Fig. 1 showing the latch bolt in projected position;

Fig. 4 is a cross section of a complete door lock taken on line IV-IV of Fig. 1;

Fig. 5 is a horizontal section taken on line- Fig. 9 is a perspective view of the rollback member ll; J

Figs. 10 and 11 are perspective views of the latch bolt and connected 'retractor plate looking from opposite sides thereof;

Fig. 12 is a perspective view of the look as a whole applied to a door; and a Fig. 13 is-a perspective view of the look as 'a whole before being applied to a door.

Iii is bent at right angles to form a shoulder I2. A similar shoulder [2a is formed on plate 8, and a dogging lug I4 is formed on the upper edge of plates 9 and it. The bolt C as shown is formed of'four plates which represents a thickness substantially equal to the space formed between the inner face of the cover plate It of the lock housing and an inner base plate ii. A recess or space is formed between the shoulders i 2 and H1: on the retractor plate to receive a rollback member i1, and as plate il terminates at a point just behind the inner end of the bolt 0, space is also formed in the opposite side of the retractor plate for the reception of a rollback member I 8. This latter rollback member is secured as at i9 (see Figs.

4, 5, 7- and 8) to a spindle 20 which is joumalled as at 2| in the cover ii of the lock housing. A knob or handle 22 is secured on the outer endof the spindle and by rotating the knob and spindle,

the rollback member may be swung back and forth. The rollback member carries a pin 23 which projects into a square shapedpocket 24 formed the retractor plate (see Figs. 1, 2, 3 and 11); hence. when the rollback member i8 is swung eiiier back or forth by means of the handle 22, pin 23 will engage one side wall or another of the pocket and thereby project or retract the latch bolt.

By referring to Figs. 1, 2 and 3, it will be noted that the pocket 24 has a width substantially twice the diameter of pin 23. This allows a certain amount of free movement of the rollback member IS without imparting movement to the retractor plate and latch bolt. This free movement is important as the rollback member has two flmctions-flrst, that of releasing a doggin ber 25 with relation to the dogging lug l4, and second, that of projecting or retracting the latch bolt. The dogging member 25 is secured between a pair of spaced arms 26 which are pivoted in the lock housing at the point 21. A spring 28 is interposed between the lock housing and the dogging member 25, thereby normally holding it in engagement with the dogging lug II. It is accordingly necessary toraise the dogging member 25 away from the lug ll before the latch bolt can be either projected or retracted, and this is accomplished during the free movement of the rollback member [8 as the flattened upper end i8b will during this movement engage the lower edge of the outermost arm 28 and thereby raise the dogging member sufliciently to clear the lug I4. At the moment this has been accomplished,

upper end I80 of the rollback member again engages the outermost arm 26 and raises the dogging member and thereafter causes retraction, f the latch bolt.

The description so far submitted describes operation of the lock from the inner side of a door only. To operate the lock from the outside or exterior surface, a standard form of key actuated pin tumbler lock 30 may be employed. The key actuated cylinder 3| of this lock is in the present instance provided with a spindle bar 32.square in cross section. This spindle bar projects through I the hub 33 of a second rollback member I! and into the hollow spindle which carries the rollback member It. The spindle bar 32 is freelyrotatable in the spindle 20 thereby insuring in-. dependent operation of the key actuated rollback member II. This member is best shown in Figs. 1, 2, 3 and 9. It is disposed in the space or recess formed between the shoulders I! and H11 and assumes the position shown in Fig. 1 when the latch bolt is retracted. when a key is inserted in the pin tumbler lock and rotated in the direction of arrow 11 (see Fig. 1), the rollback member i! will rotate in the same direction and will rotate free for a distance of substantially 180, or until it assumes the position shown in Fig. 2 where it has engaged and lifted the dogging member free of lug ll. The rollback member is then turned in the same direction another 180, and during that movement engages shoulder l2a causing projection of the'latch bolt, and finally swings away therefrom to assume the position shown in Fig. 3. To retract the latch bolt by means of the key, it is only necessary to turn itin the opposite direction. The rollback memher will then swing in the direction of arrow 1) (see Fig. 3) and will swing freely about 180 to first engage and lift the dogging member 25. During the next 180 of movement, it engages shoulder i2 and causes retraction of the latch bolt and finally assumes the position shown in Fig. 1. Thus the key actuated rollback member requires one complete rotation to retract or project the latch bolt while the rollback member I! swings through an arc of 90' only from the position shown in Fig. 1 to that shown in Fig. 3 or vice verse to fully project or retract the latch bolt. Projecting and retracting movement of the latch bolt may be limited by the length of the slot 1 formed in the retractor plate or by engagement of the shoulders l2 and [2a with opposite sides of the rollback member The latch bolt is dogged against movement both in its projected and retracted positions. The latch bolt is actuated either by manual or key operation, and each operates independently of the other. The lock as a whole is simple both in construction and operation. The individual parts required are few, and while this and other features of my invention have been more or less specifically described and illustrated, I nevertheless wish it understood that changes may be resortedto within the scope of the appended claim, and that the materials and finish of the various parts employed may be changed in accordance with the experience of the manufacturer, or as varying conditions may demand.

Having thus described our invention, what we claim and desire to secure by Letters Patent is:

' In a lock of the character described, a housin a latch bolt and a connected retractor plate slidably mounted in the housing, said latch bolt being laminated in construction and consisting of four united plates the twoinnermost of which are extended to form a retractor plate having a thickness about half that of the latch bolt so as to form a space between th lock housing and each side of the retractor plate, a pair of independ- -bers during rotation of, either spindle first engaging the dogging arm and; releasing it with relation to the dogging lug and then engaging one or another of the spaced shoulders on the side of the retractor plate adjacent thereto to either extend or retract the latch bolt.

wanraaa. semen. WARD H. HAHIR.

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