US3316006A - Mortise lock hub cover - Google Patents

Description

April 25, 1967 F RUSSELL ET AL 3,316,006

MORTISE LOCK HUB COVER Filed April 23, 1965 ATTOQNEYS `in the altered arrangement.

United States Patent O 3,316,006 MORTISE LOCK HUB COVER Fred J. Russell, 8635 Otis St., South Gate, Calif. 90280, and Roger J. Nolin, Monterey Park, Calif.; said' Nolin assignor to said Russell Filed Apr. 23, 1965, Ser. No. 450,462 3 Claims. (Cl. 292337) Door locks fall into various classifications. Although the subject of the invention herein disclosed is applicable -to various locks provided with a case, it has par- -ticular advant-age when employed as part of a lock usually identified as a mortise lock. Such a lock is one which lits into a recess which has been cut into the door from the free edge of the door.

Mortise locks often are selected when a rugged, high quality type of lock is needed. Typical installations for a high quality mortise type lock are installations for hotels, hospitals, and schools. Different functions to suit different needs are expected of mortise locks, some of which are appropriate when the locks are used, for example, on hotels. Others are more particularly advantageous when used on schools, but are unsuitable for hotels. As a practical matter, it is not feasible to in ventory as many different mortise locks as the trade might demand. Therefore, mortise locks are often so constructed that they can be taken apart or partially taken apart and certain interior mechanisms removed and replaced by different mechanisms without other change in the lock, .thereby to make the lock structure useable, except for the one or two al-tered parts, in each of many different types of installations. Sometimes the lock needs to be changed after it has been installed in order to accommodate some different need.

Although changes have always been possible, in the pas-t, such locks had to be dismantled substantially in order to make the change and Athen put back together Where mortise locks are complex in their mechanical arrangement, as is usually the case, considerable skill and much time has been involved in making such changeovers.

It therefore is among the objects of the invention to provide a new and improved mortise lock case so arranged that the case may be only partially dismantled in order to gain access to a portion of the interior, whereby to change some of the parts without any need for opening other portions of the case.

` Another object of the invention is to provide a new and improved case for a mortise type lock which is of `multiple construction, whereby a cover is provided with a second sub-cover which is advantageously located, so that the cover itself may remain in place, holding together most of the complex lock mechanism, while the sub-cover can be removed to permit extraction and replacement of only certain of the operating parts, without disturbing the mounting of those remaining,

Still another object of the invention is to provide a new and improved cover assembly for a mortise type lock, wherein a cover for gaining access to the entire interior of the lock mechanism is prov-ided with a sepa rate sub-cover mounted upon and forming a removable portion, the sub-cover being so constructed and mounted that, when in place, it will be flush with Ithe exterior of the cover and the case, thereby requiring no extra installation technique; the sub-cover, furthermore, being snuggly nested in the cover itself in a manner which occupies relatively a minimum amount of space.

3,3l6,0il6 Patented Apr. 25, 1967 With these and other objects in View, the invention consists in the construction, arrangement, and combina- .tion of the various parts of the device, whereby the objects contempla-ted are attained, as hereinafter set forth, pointed out in the appended claims, and illustrated in the accompanying drawings.

In the drawings:

FIGURE l is a side elevational view of a fragment of door, showing a mortise type lock mounted therein, with the door partially broken away lto reveal the sub-cover arrangement.

FIGURE 2 is a fragmentary view of a portion of the door, showing the mortise type lock mounted thereon in end elevation.

FIGURE 3 is a side elevational view of that portion of the case which carries the removable sub-cover.

FIGURE 4 is a view similar to FIGURE 3, showing the case with `the sub-cover removed.

FIGURE 5 is a transverse sectional view on approximately the line 5-5 of FIGURE 3, but wherein only portions of the mortise lock mechanism are shown such as have a bearing upon the present invention.

FIGURE 6 is a vertical sectional view on the line 6-6 of FIGURE 3.

FIGURE 7 is a side elevational view of a hub element which may be substituted for one of the hub elements pictured in FIGURES 4 and 5.

A lock construction especially well adapted to the invention here under consideration is shown and described in copending applications Serial No. 450,461, tiled April 23, 1965; Serial No. 450,450, tiled April 23, 1965, now Patent No. 3,298,729; Serial No. 450,447, tiled April 23, 1965; Serial No. 450,472, tiled April 23, 19615; Serial No. 450,460, filed April 23, 1965; Serial No. 450,446, filed April 23, 1965.

In the embodiment of the invention which has been chosen for purposes of illust-ration, a typical mortise type lock has been indicated generally by the reference character 10 and provided with a case indicated by the reference character 11. The case is made up of an inside wall 1.2, an outside wall 13, an outer end wall 1.4, an inner end wall 14', a top wall 15, and a bottom wall 15. Following common practice,1 this mortise type lock 10 is provided with a dead bolt 16, a latch bolt `18, and an auxiliary bolt 20. The door is provided with a recess 22 in which the case 11 is positioned. A front plate 21 overlies the outer end wall 14 `and is fastened to the outer end wall 14 by means of screws 25.. The outer end wall 14, in turn, is fastened to an end edge 23 of a door 24 by means of screws (not shown). An inside knob is indicated by the reference character 26, and an outside knob is indicated by the reference character 27. A bearing 28 assists in mounting the inside knob 26, and a rose 29 surrounds the bearing 210. A bearing 30 and a rose `31 serve in a similar respect with regard to the outside knob 27.

A square spindle 36 is nonrotatably secured by conventional means (not shown) to .the outside knob 27. A similar square spindle 36 is nonrotatably mounted by conventional means with respect to the inside knob 26. In the chosen example, the square spindle 36 fits nonrotatably in a rollback 33. Similarly, the square spindle 36 fits nonrotatably in a rollback 40. Both rollbacks, 38 and 40, are adapted to cooperate with a relatively broad block 4Z which, acting through a cam 413, are adapted to move against a rollback link 44. By mechanism not shown and not important to the present invention, the rollback link 44 is adapted to manipulate the latch bolt 18. By way of example, when the outside knob 27 is rotated clockwise, as viewed in FIGURES l, 3, and 4, an end 50 of the rollback 38 is moved against the block 42, shifting it in a direction from left to right so that the cam 43 moves against the rollback link 44 causing it to operate. lFor a counterclockwise rotation of the outside knob 27, an end 51 moves against the block 42 for a similar purpose. The block 42 can also be independently shifted in a di-rection from left to right, as viewed in FIGURES 4 and 5, by rotation of the rollback 40 in response to rotation of the inside knob 26 and 4the spindle 36 attached to it.

In practice, both of the rollbacks 38 yand 40 are s-lidable endwise on the respective spindles 36, 36. Rollbacks 38, 40, if desired, can have a complimentary rotatable engagement with each other (not shown). In the arrangement illustrated in FIGURES 4 and 5, for example, the rollback 38 is provided with a notch 52 which can be manipulated by any one of a number of known expedients customarily available when the door is open, thereby to block rotation of the ou-tside knob 27 and its corresponding rollback 38 in order to prevent the door from being opened from the outside. Since the rollback 40 is cut away at the area 54, the rollback 40 will not be engaged by the blocking key 53, and, hence, the inside knob 26 will not be blocked from rotation.

Occasions may arise, however, when it might be desirable to interchange the posi-tion of the rollbacks 38 and 40, without at the same time changing any other portion of the lock mechanism. Further still, it might be desirable to substitute for the rollback 38 a rollback 5S of slightly dilerent design, as shown separately in FIG- URE 7. The rollback 55, provided, as usual, with a square hole S6 to nonrotatably engage the square spindle 36, has two notches 57 and 58 located on a different portion of the rollback 55 f-rom the position occupied by the notch 52. Should the rollback 55 be substituted for the rollback 38, then it would be possible to hold the square spindle 36 and outside knob 27 in a position of partial rotation in either a clockwise direction or a counterclockwise direction. When it is understood .that by rotating the outside knob 27, thereby to manipulate the block `42 and rollback link 44 to withdraw the latch bolt 18, it will be apparent that the latch bolt 18 can be held in withdrawn position by extending the blocking key 53 into one or another of the notches 57, 58. This opportunity to substitute one rollback for another has been described in detail in order to illustrate the need f-or a partial disassembly and reassembly of a mortise lock. Obviously, if no operating par-ts other than those described are to be removed, interchanged, or replaced and where this can be accomplished because of the mere face-to-face relationship of the rollback with the block 42, there is, accordingly, need to gain access only to that portion of the interior of the case 11 which is occupied by the rollbacks.

The outside Wall 13 in the chosen embodiment is employed as a cover. Constructed in this fashion, the outside wal-l 1.3 overlies the inner end wall 14' and the top and bottom walls 15, respectively, to which it is secured by means of bolts 59, the bolts 59 normally extending through the case 1'1 into the opposite or inside wall 12. Since the outside wall 13 is to be left in place, there is provided in the outside wall 13 an opening 60 of relatively lirregular shape, but large enough to clear the rollbacks 38 and 40. Around the opening 60, the outside wall 13 has a depressed portion which provides respectively two relatively small areas 61 and 62, and a relatively large area 63. A sub-cover 64 in the shape of an irregular T flts over the small and large areas 61, 62, and 63, and a leg portion 65 extends part way into a cutout portion 66. Screws 67, 68, and 69 extend through the sub-cover 64 into appropriate threaded holes 70, 71, and 72, respectively. It will be further noted, from an examination of FIGURE 6, that the depressed portion, as exemplified by the large area 63, has a depth such that, when the sub-cover 64 has the same thickness as the outside wall 13, an exterior surface 73 of the subcover 64 is flush with the exterior surface of the outside wall 13. When the depressed portion is no deeper than las shown :and described, the depressed portion does not extend inwardly into the case 11 any deeper than the thickness of the outside Wall 13, and, hence, no unnecessary amount of space is taken up by this construction. One or more edges of the depressed portion, where they coincide with corresponding edges of the subcover 64, may serve as positioning anges to properly locate the sub-cover 64 in position.

Accordingly, should the need arise to substitute the rollback 55, for example, for .the rollback 38, the subcover 64 can be removed by removing the th- ree screws 67, 68, and 69, whereupon access is had to the rollback 38. Of course, the outside knob 27 must be removed, and the rollback must be substituted for the rollback 38. 'Following this, the sub-cover 64 must be replaced. The exchange therefore, [has been made possible without removing the bolt 59 and the outside wall 13. Consequently, no other portions of the mortise lock mechanisms need to be disturbed.

When the sub-cover 64 is removed, the rollbacks'38 and 40 may be freely interchanged or removed, if desired, and other rollbacks substituted, without disassembling the lock to any greater extent. To further improve the rotatable mounting of the rollbacks, a bushing 38' may be provided on the rollback 38, for example, rotatably mounted in a circular opening 64 in the subcover 64. The rollback 40 may be similarly formed and mounted in the inside wall 12.

Whereas the sub-cover 64 in the embodiment has been described as located over the opening in the outside wall 13, it alternately would be feasible to locate the sub-cover 64 on the inside wall 12, thus providing just as effective access to the rollbacks 3S, 40, and 55.

While the invention has herein been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is not to be limited to the details disclosed herein, but is to be accorded the full scope of the claims, so as to embrace any and all equivalent devices.

Having described the invention, what is claimed as new in support of Letters Patent is:

1. In a mortise lock, a case including a removable cover plate on one side of the case, a lock mechanism in said case having operating parts located therein, a portion of said operating parts constituting a partial lock mechanism, said case having an opening -therein surrounding said partial lock mechanism, sec-tions of said cover at the perimeter of said opening being depressed, a removable sub-cover of substantially the same size as said opening and resting on said sections so that the exterior of the sub-cover does not project beyond the exterior of the cover, and releasable means securing said removable sub-cover to said case.

2. In a mortise lock, a case including a removable cover plate on one side of the case, a lock mechanism in said case having operating parts located therein, a portion of said operating parts constituting a partial lock mechanism, a spindle means extending beyond at least one side of said case and engaging said partial lock mechanism, .said case having an opening therein surrounding said partial lock mechanism and said spindle, a removable sub-cover of substantially the same size as said opening and having a hole for said spindle means, said spindle means extending through said sub-cover and rotatably engaging said partial lock mechanism,.and releasable means securing said removable sub-cover to said case.

3. In a mortise lock, a case including walls forming a chamber and including a cover plate on one side thereof, a lock mechanism in said chamber, said lock mechanism including at least one hub, an opening in said case of area greater than said hub and surrounding said hub, a sub-cover of substantially the same size as said opening which, when in place, holds said hub in position, and releasable means securing said removable sub-cover to said case whereby said sub-cover can be removed to enable changing of said hub without disturbing the rest of said lock mechanism in said chamber.

References Cited bythe Examiner UNITED STATES PATENTS 80,974 8/1868 Kinzer 292-244 152,369 6/1874 Hamill et al. 292-244 396,916 1/1889 Burgess 292-337 1,719,282 7/19129 Wilson 292-337 X 1,981,074 11/1934 Rowse. 2,346,636 4/ 1944 Porter 220-29 X 10 MARVIN A. CHAMP-ION, Primary Examiner.

RCHARD E. MOORE, Examiner.

Claims (1)

1. IN A MORTISE LOCK, A CASE INCLUDING A REMOVABLE COVER PLATE ON ONE SIDE OF THE CASE, A LOCK MECHANISM IN SAID CASE HAVING OPERATING PARTS LOCATED THEREIN, A PORTION OF SAID OPERATING PARTS CONSTITUTING A PARTIAL LOCK MECHANISM, SAID CASE HAVING AN OPENING THEREIN SURROUNDING SAID PARTIAL LOCK MECHANISM, SECTIONS OF SAID COVER AT THE PERIMETER OF SAID OPENING BEING DEPRESSED, A REMOVABLE SUB-COVER OF SUBSTANTIALLY THE SAME SIZE AS SAID OPENING AND RESTING ON SAID SECTIONS SO THAT THE EXTERIOR OF THE SUB-COVER DOES NOT PROJECT BEYOND THE EXTERIOR OF THE COVER, AND RELEASABLE MEANS SECURING SAID REMOVABLE SUB-COVER TO SAID CASE.

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