US2314462A - Door lock - Google Patents

Description

' March 23, 1943. w R SCHLAGE 2,314,462

DOOR LOCK Filed March 17, 1941, 2 smeg-'sheet 1 lig-1 'DI h/ 4o I6 'I .37s i n 5 /u- .as

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March 23,1943. w, R, SCHLAGE 2,314,462

DOOR LOCK Filed March 17, 1941 2 Sheets-Sheet 2 `IN VEN TOR.

Patented Mar. 23, 1943 DOOR LOCK Walter R. Schlage, Burlingame, Calif., assigner to Schlage Lock Company, San Francisco, Calif., a corporation of California Application March 1 7, 1941, Serial No. 383,702

2 Claims. 4(Cl. 'Y0-153) This invention relates to a door lock, and especially to improvements in the structure and operation of the door lock mechanism disclosed in my former Patent No. 2,062,766, entitled Door lock, issued December 1, 1936-.

In the patent above referred to, a hollow spindle having a rollback member formed thereon is shown and actuated thereby is a retractor plate to which is secured a latch bolt. A dogging member engageable with the spindle to dog the spindle against rotation and the retractor plate and latch bolt against retraction is also shown, and, in addition thereto, is shown a bar which is engageable with the dog to move it into or out of clogging position. This bar extends through the hollow spindle and is key actuated from the exterior of the door and manually actuated from the interior of the door.

The purpose of the present invention is to improve the construction of the dog actuating bar; to provide a dog actuating bar which may itself function as a dog; and further, to provide a bar which is adapted to be key actuated from both sides of the door so that the lock may be applied to communicating doors.

The invention is shown by way of illustration in the accompanying drawings, in which Fig. 1 is a horizontal longitudinal section showing the lock applied to a door;

Fig. 2 is a vertical longitudinal section taken on line II-II of Fig. 1;

Fig. 3 is a vertical cross section taken on line III- III of Fig. 1; f

Fig. 4 is a cross section taken on line IV-IV of Fig. 3;

Fig. 5 is a cross section taken on line V-V of Fig. 3;

v Fig. 6 is a perspective View of the retractor plate, showing the head member on the inner end thereof and the latch bolt on the outer end;

Fig. 7 is a perspective view of the dogging member;

Fig. y8 is a perspective View of the tubular spindle;

Fig. 9 is a perspective view of the key actuated cylinder indicated at 3l;

Fig. 10 is a perspective view of the dog actuator;

Fig. 11 is a perspective view of the key actuated cylinder indicated at 38;

Fig. 12' is a perspective View of the key actuated cylinder mounted in the outer end of the spindle or that carrying the knob 58 (see Fig. 14);

Fig. 13 is a perspective View of a manually actuated dog actuator;

Fig. 14 is a section similar to Fig. 1, showing key operation through one knob and manual operation through the opposite knob; and

Fig. 15 is a cross section taken on line XV-XV of Fig. 14.

Referring to the drawings in detail, and particularly to Figs. 1 and 2, A indicates a door in one edge of which is cut a rectangular shaped opening dei-ined by the lines 2, 3 and 4, and adapted to close the outer edge of the kopening and the sides thereof is a lock housing comprising a pair of side plates 5 and 6 which are connected by a front section l, and tting between the plates 5 and 6 is a U-shaped frame composed of upper and lower members 8 and 9, connected at their inner ends by an end section I0 and secured to the front section 7 of the lock housing by right angular foot lugs II and counter sunk screws I2'.l

Formed on each of the side plates 5 and 6 of the housing is a bearing hub I4 and extending through and journalled in said hubs is a tubular spindle I5, on opposite ends of which are secured door knobs IB and I'I. The spindle is best shown in Fig. 8. It has a rollback member I 8 formed thereon midway of its ends, a pair of slots I9 on opposite sides of the rollback, a pair of slots 28 and 2I in each end, and a flat shoulder 22 at each end. Slidably mounted between the upper and lower members 8 and 9 of the U-shaped frame is a retractor plate 23 at the forward end of which is secured a latch bolt 25. Secured tothe rear end of the retractor plate is a head member 26 which serves as a guide for the retractor plate as it extends into slots 8a and 9a formed in the upper and lower members 8 and 9 of the frame.

The forward face of the heal is notched as at 21 tov permit a dog actuating .bar28 to extend therethrough, and this notch also forms a pair of shoulders 29 which are engaged by the rollback member I8. The head also functions as a support for a plate 30 which carries a pair of dogs 3I (see Figs. 1 and 7). The dog carrying plate is engaged by a compression spring 32, while the head 26 is engaged by a pair of springs 33.

The dog actuating bar 28 is best shown in Figs. l, 2 and 3, and in perspective in Fig. 10. It is formed as an integral part of two cylindrical shaped members 35 and 36, each of which is provided with an end lug, said end lugs being indicated at 35a and 35a. The dog actuator is disposed within the hollow spindle midway of its length so that the center portion of bar 28 will align with the plate 30 which carries the dogs 3|, and it is held in this position against endwise movement by a pair of key actuated pin or plate tumbler cylinders 31 and 38. These are inserted in the hollow spindle from the opposite ends and their inner ends are provided with pairs of lugs 31a and 38a, which are'adapted to engage the lugs 35a, and 36a. The spindle functions as a lock housing for the key actuated tumbler cylinders, and it is for this reason that the spindle is provided with the longitudinally eX- tending slots and 2|. That is, the tumblers 39 carried by the respectivercylinders, whether they be of the pin or plate type, willnormally project into the slots 20 and 2| (see Fig. 3) and thus secure the respective cylinders against rotation. The insertion of a key, however, causes withdrawal of the tumblers from the slots, and the cylinders maythen be rotated by the keys. Such rotation will cause the lugs 31a or 38a which are engageable with the lugs 35a and 36a of the dog actuator to rotate the same.

The lock here shown is particularly intended for communicating doors. That is, it is applied to a door connecting two rooms or compartments, for instance, where it is desired to lock the door from both or either side to prevent opening thereof when the two adjoining rooms or compartments are occupied by different parties. Under normal conditions of operation, the key will be inserted in the cylinder 31, the tumblers 39 are withdrawn, and the cylinder may be rotated. This rotation is, however, limited to a half revolution. During this half revolution, the lugs 31a will engage the lug 35a and will thus rotate the bar 28 from the vertical position shown in Fig. 2 to a horizontal position. During this rotation of the bar 28 the plate 30 is pushed rearwardly, and as this plate carries the dogs 3| they will also move rearwardly and out of engagement with the openings or slots |9 formed in the spindle. This unlocks the door, as the spindle may now be rotated by either knob and when the spindle is rotated the rollback member |8 will engage one or another of the shoulders 29 on the retractor plate and thus force it rearwardly', causing retraction of the latch bolt 25. On the other hand, if the bar 28 assumes a horizontal position and the key is inserted and rotated, the bar will move from a horizontal to a vertical position. In that case, the spring 32 will force the plate 30 inwardly and the lugs 3| into engagement with the slots I9 of the spindle, thus dogging it and the knobs against rotation and the latch bolt against retraction. The dog actuator or bar 28 may be rotated from either end of the spindle, as both ends of the spindle are provided with a key actuated tumbler. cylinder. In other words, the door may be locked from either side and it can only be opened by a person in authority who has possession of the proper key.

The cylinders 31 and 38 'secure the dog actuator or bar 28 against endwise movement within the cylinder, as they engage opposite ends thereof and they themselves aresecured against endwise movement or removal from opposite ends of the spindle by collars 40. These collars are overlapped by annular shoulders 4| formed on the outer ends of the knobs and it is in this manner that the cylinders 31 and 38 are secured against removal. That is, they cannot be vremoved until the knobs are removed.

It was previously stated that when a key is inserted in one of the cylinders and rotated that only half a revolution could be transmitted. This is due to the fact that the spacing between the lugs 31a and 38a is just suiiicient to permit half a revolution. For instance, if the dog actuator shown in Fig. 10 is rotated by means of the lugs 31a such rotation will be limited by the lugs 38a as the lug 36a rotates between them, and cylinder 38 which carries the lug 38a, is 4anchored bymeans of the tumblers 39. In other words, the spacing between the lugs 38a or 31a is such that only half a revolution can be transmitted, and as the spacing between the lugs 31a and 38a is the same, a half revolution will be the limit, regardless of which of the cylinders 31 or 38 is being rotated by means of the key.

The dog actuator 28 has a limited movement of only That is, it can only assume one of two positions, the Vertical position shown in Fig. 2, or a horizontal position, and such movement is 90, due to the fact that there is a play between the lugs 31a and 38a, and the lugs 35a and 36a equal to 90. Hence, when either of the cylinders 31 and 38 is rotated by means of a key, these cylinders may rotate a half revolution each but, due to the fact that there is a 90 loss of motion between the lugs, as previously described, the dog actuator will be turned only` 90. Of course, if two keys were inserted at the same time and the tumblers 39 withdrawn from the slots in the spindle, both cylinders together with the dog actuator could be rotated indefinitely, but that would obviously serve no useful purpose and hence would not be done.

In Fig. 14 a modied form of the invention is shown. In this instance, the key actuated cylinder is applied to the outer knob indicated at 50 and a manual control in the form of a thumb turn is mounted in the inner knob indicated at 5|, the thumb turn being indicated at 52. In that case, the lugs on the inner end of the key cylinder mounted in the outer knob will be the same as that shown in Fig. 12. The dog actuator or bar shown at 28a in Figs. 13 and 14 is in this instance secured by a solid cylindrical bar 53 to the thumb turn. Thus the bar 28a may be manually operated from the inner knob and key actuated from the outer knob. When it is actuated by the thumb turn, the bar 28a may only be turned 90, as the key cylinder is anchored and the lost mo tion between the lugs on the inner end thereof is only 90. When a key is inserted, or, in other words, when the dog actuator is actuated by the key mechanism, a half revolution is permitted, as the lugs on the inner end of the key cylinder will have to move 90 with lost motion and another 90 to rotate the bar 28a. Means must accordingly be provided to limit rotation ofthe key actuated cylinder in the knob 50 to a half revolution, and this is accomplished by forming the shoulders 22 at the outer end of the spindle which engages a plate 40a having two flat sides such as shown at 40h and 40e (see Fig. 15). Thisplate is secured to the key actuated cylinder and obviously limits rotation of the key actuated cylinder to half a revolution. Ifthe plate 40a did not have the flat sides to cooperate with the shoulders 22, the key actuated cylinder would be free to rotate more than half a revolution; this would not be desirable, as it would be diicult to know just what positions were assumed by the bar 28.

The structure disclosed in this application distinguishes from the structure shown in my former Patent No. 2,062,766 in two main features, first, that it permits key actuation of the dog actuator or bar 28 from opposite ends of the spindle, thus providing a lock which is particularly adapted for communicating doors; and secondly, that it makes the dog actuator as a separate member disposed between the key actuated slots (see Fig. Further, the cylindrical part of the do-g actuator indicated at 35 and 35 and the key cylinders 3'! and 38 t the interior diameter of the hollow spindle and thus increase the rigidity and strength of the spindle and the parts which are rotated therein.

In the description so far submitted, the bar 28 has been referred to as a dog actuator, as it actuates the plate 30 and the dogs 3i carried thereby. This bar may also function as a dogging member, and this is accomplished as follows: By referring to Figs. 2 and 6, it Will be noted that the head 26 of the retractor is notched as at 21 and that the notch is circular in shape when Viewed from the side to permit the bar 28 to be rotated therein. Also it should be noted that the notch is open at the forward end, as indicated at 21a and that lugs 2lb are formed on opposite sides of the opening, and that the lugs form continuations of the shoulders 29. The inner ends of the lugs are spaced far enough apart to permit retracting movement of the retractor plate when the bar 28 assumes horizontal position, but when the bar assumes the vertical position shown in Fig. 2, the inner faces of the lugs 21h will engage the upper and lower edges of the bar and the retractor will be dogged against retraction. As the latch bolt 25 is secured to the retractor plate, it will be deadlocked or held against depression. Also the spindle will be dogged against rotation, as the rollback member I8 forming a part of the spindle will be held against rotation by the shoulders 29. Thus the bar 28 functions not only as a dog itself but also as a dog actuator, as it actuates the dogs 3|. Furthermore, there is provided a double dogging of the spindle. In actual practice, the lugs 2lb may be eliminated and the dogs 3| may be depended upon to accomplish the clogging of the spindle; again, the plate 30, and the dogs 3l may be eliminated and the bar 28 and lugs 27h depended upon to accomplish the dogging operation, or both may be used.

While this and other features of my invention have been more or less specifically described for purposes of illustration, I wish it understood that various changes may be resorted to within the scope of the appended claims.

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

1. In a lock of the character described, a tubular spindle, a dog for dogging the spindle against rotation, a dog actuator Within the` spindle controlling the position of the dog to dog or undog the spindle, said dog actuator comprising a pair 4of cylindrical-shaped members tting the interior of the tubular spindle, said members being spaced apart and connected by a dog actuating bar, and means operable through either end of the tubular spindle for rotating the cylindrical-shaped members and the connecting bar to actuate the dog.

2. In a lock of the character described, a tubular spindle, a dog for dogging the spindle against rotation, a dog actuator within the spindle controlling the position of the dog to dog or undog the spindle, said dog actuator comprising a pair of cylindrical-shaped members fitting the interior of the tubular spindle, said members being spaced apart and. their adjacent faces being connected by a dog actuating bar, a lug formed on the opposite end of each cylindrical shaped member, a rotatable member in each end of the tubular cylinder and fitting the same, a pair of lugs on the inner end of each rotatable member engageable with the lugs on the opposite ends of the cylindricalshaped members, and means for rotating either of the rotatable members to rotate the dog actuator.

WALTER R. SCHLAGE.

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