US2470770A - Communicating door lock - Google Patents

Description

COMMUNICATING DOOR LOCK Filed Jan. 24, 1945 I 71 nmn/% 82 r1 .4. 5g f 7& 7:4. a

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25 61 6a 52 ZZQATTORNEY Patented May 24, 1949 UNITED STATES PATENT OFFICE COMMUNICATING DOOR LOCK Application January 24, 1945, Serial No. 574,315

2 Claims. 1

This invention relates to locks; more particularly to spring projected latch bolts with dogging means for the spindle operator of the latch bolt retractor assembly; and still more particularly, to looks for communicating doors, bathrooms and the like.

It is an object of my invention to provide a mortice-type of latch bolt for doors and the like, which is exceedingly simple insofar as it involves the nature and number of movable parts, wherein dogging of the latch bolt retractor mechanism assembly is secured in a highly eflective manner, and which will withstand most rigorous use, and require the minimum amount of attention for adjustment, replacement and maintenance.

More particularly, it is an object of my invention to provide a lock having a spring projected latch bolt which may be readily used in communicating doors, such as between adjoining rooms of hotels, compartments of trains, steamships, where temporarily at least, such communicating doors may be locked, or in bathrooms of hotels and like establishments, where a bathroom is accessible to more than one room, and which may require independent locking from opposite sides of the same door.

My invention therefore has as an object thereof to provide a lock for communicating doors which may be locked from opposite sides, and employ a single latch bolt having the retractor mechanism thereof operable from opposite sides of the door, yet embodying a single bolt, thereby effecting substantial economies in lock mechanism of this character.

Still further objects of my invention reside in Figure 3 is a section taken on the line 3-3 of Figure 1;

Figure 4 is a section taken on the line 4--4 of Figure 1;

Figures 5 and 6 are perspective views of the rollback and spring hub assembly.

Making reference to the drawings, a lock in accordance with my invention is illustrated in the form of a casing Ill, morticed within a door H, and held in position edgewise of the door by the end plate l2, employing screws l3 or like fastening elements. The plate |Z includes an opening l4 through which the latch bolt l5 projects. The latch bolt is affixed to a latch bolt shank [B by screw threading or the like means of attachment, and is directed rearwardly through the guiding studs I1 and I8, defining a guide slot 19. A helical spring 2|] is convoluted on the shank l6 between the rearward shoulder of the latch bolt l5 and the studs I1 and IS. The latchbolt is formed with a headed portion 2|, leaving the neck 22 of the shank. A retractor link 23, comprising branches 24 and 25, is mounted upon guides 26 and 21 for reciprocation, and these branches terminate forwardly in a cross head having upwardly directed fingers 28 and 29, which span the neck portion 22 behind the head 2 I.

Each of the branches 24 and 25 is rearwardly directed to span the rear guides 30 and 3|, affixed to the casing side plate 32. The branches 24 and 25 include bearing portions 33 and 34, slidable upon the guides 3|] and 3|, respectively, and are radially and laterally formed with ears 35 and 36, respectively. These ears are engaged by camming fingers 31 and 38, disposed substantially diametrically on the rollback 39, formed on the hub 40, entering a bearing orifice 4| in the side plate 32.

The rollback 39 is axially formed with a keyway 42, preferably of square contour, to receive a similarly contoured knob spindle 43 in keyed engagement therewith. Preferably the rollback 39 is recessed at 44, to form a housing portion within which may be retained the spool 45 which carries a hub portion 46, and is axially formed with a keyway 41, desirably of square contour to receive the knob spindle 43.

The spool 45 has its flanges 48 and 49 provided therebetween with a coiled spring 50, the ends 5| and 52 whereof are bent outwardly radially and are held under tension against expansion by straddling to opposite sides of the anchoring pin 53, which is fixed by passing through the flanges 48 and 49. The spool 45 may be housed within the recess 44, to align the keyways 42 and 47, and this aligned position is maintained by forming the flanges 38 and 49 with splines 54, correspondingly positioned to the spline 55 formed in the wall of the rollback 39 defining the recess 44.

The rollback 39 is also formed with an annular cutout 56, leaving shoulders 57 and 58 spaced apart sufiiciently to allow for an oscillation of the rollback, as will appear more clearly hereinafter, and also to provide a clearance for the radially directed spring ends 5| and 52. With this assembly effected and the keyways 52 and 41 aligned, the spool may be housed within the recess 44 and keyed thereto by dropping a feather pin 59 in the aligned splines 54 and 55.

With the spool 45 housed in the rollback 39 within its recess 64, the hub portion 46 thereof may thereafter be positioned in the cap plate 60 and the bearing orifice 6| provided therefor.

As assembled, the camming fingers 3? and 38 arearranged to engage the ears 35' and 36, respectively, of the retractor link 23, which, upon oscillation of the spindle 43 Clockwise or counterclockwise, will serve to retract the latchbolt'. l5 acting upon the head'Zl of its shank it; In this manner, knobs 62 and 63 attaohed'to the spindle 43 and projecting through the apertures ii i' andfili are rotatably mounted on the escutchoons 855 and 61 for retraction of the latch bolt when either of the knobs 62 or 53 is oscillated.

In order to orient the camming fingers 3'1 and 38 of the rollback 39 and the link'zs actuated thereby, to the neutral position from either of the oscillated positions independently of the spring projected latch bolt, the spring fingers 5| and 52 are arranged to span the pinGlll acting as the fixed point of resistance forthe coiled spring 5i), with the pin 53 acting as the movable point of resistance with respect to the ends 51 and 52 upon oscillation of the rollback 39.

The guide fingers 28 and 29 for the link 23 normally abut the studs I? and i3 which'form the forward stops for the link. For clogging the link 23 against action by the rollback fingers 3i and 38, I extend from the link branch alug and provide an engaging face l9 which is substantially tangential to the axial line of" a pair of locking element hubs l! and 72, each of which is rotatably mounted in the side Wall 32, and cap plate 8%); respectively, and which have directed through keyways l3 and 14 keying spindles l5 and i6, projected through borings'l'l and 18 to said keyways 13 and 14, respectively. Escutcheons l9 and 80 rotatably mount the spindles l5 and i6, respectively, and each of the spindles may be connected to turnbuttons 8i and 82 on opposite faces of the door.

The hubs H and l2 each carry dogging fingers 83' and 84, whose-abutting ends 65 and 85 may both engage the engaging face '59 of the lug 59, to lie against the same and when given limiting engaging movement, each of thedogging fingers 83 and 84 engages the stop pin it? which is located to direct the dogging fingers so and 84 in a pre-dead-center position with respect to the lug. face E9, the effect of which relationship of dogging fingers 83 and 84 to the lug face'l'b is-to take up any play in the link 23 and" effectively move the fingers 28 and 25 into abutting position against the studs I? and I8.

Each of the hubs H and 12 is formed with peripheral flat oamming faces 88 and 89, engageable by the detent springs 90 and 9!. The detent springs 99 and 9! are Wrapped under tension about the anchoring pin 92, to have the free end 93 engage the end wall 94 of the casing.

By the construction shown and described, it will be observed that spaced, independently operable and aligned dogging fingers 83 and 8 8 may each be used to dog the link 23, in turn locking the spindle 43 by engagement effected by the ears 35 and 35 upon the camming fingers 37 and 38.

Thus, a single latch bolt may be employed, and with the same secure effective dogging of the spindle operated mechanism for the latch bolt independentlyto opposite faces of the door, by the turnbuttons 8| and 82, where the lock mechanism is used in'a communicating door installation.

It will be understood that while I have shown independent turnbuttons BI and 82 for a communicating door, that key operated means may be employed to rotate the spindles l5 and it, especially where the communicating door may serve as a common door between hotel roomsor compartments desired to bev maintained in a locked' condition to the respective occupants.

It will also be observed'that while I have disclosed independently operable hubs TI and i2, I may provide a common spindle for manipulating one or both dogging-fingers 83 and 8'4 in unison, where operation from only one side of the door is desired; as where the'locking' mechanismis to be used for bathroom doorsor'tlielike.

The housing'of the spring hub spool 45 in the rollback 39, with thefree ends of the spring 5| and 52 spanning the pin 6'8; provides for an oscillation of the rollback 39' to the neutral position, eliminating lost motion and play between the spindle 43L and the retractor mechanism for the latch bolt I5. In addition, the installation .and replacement features emphasized inxmy companion applications-filed on even date by me are likewise secured.

It is-further to :be understood-that while I may, bymy construction, dog the retractor link 23 by the locking elements herein described, leaving the latch bolt l5 independently depressible, as where'the-latch bolt engagesthe strike plate in slamming of the door, that dead-bolting of the latch bolt I5 may also be securedrby an alteration of the locking hubs, as more particularly described in my companion application, Serial No. 574,316, entitledLatch, filed on even date herewith.

It will be understood thatwhile I have exemplified my invention as of utility when all of the element illustrated are combined, that isolated features, segregated from the entire assembly, may. have independent utility and thatmy invention'is, accordingly, not to be limited by the employment of all of the features illustrated but only by the appended claims;

Having thus described by'invention and illustrated its'use, what I'claim as new and desire to secure by Letters Patent is:

1. In a communicating door or the like having a spring projected latch' bolt, the combination therewith comprising a spindle operable rollback hub-and retractor for'the latch bolt, locking elements mounted upon rotatable hubs, each in cluding a dogglngfinger, a lug on said'retractor for edgewise contact with said dogging finger, to dog therollback, and independent means for operating said locking elements independently'to HENRY STEPHEN HARVEY.

REFERENCES CITED The following references are of record in the file of this patent:

5 UNITED STATES PATENTS Number Name Date 1,089,435 Page Mar. 10, 1914 1,507,631 Taylor Sept. 9, 1924 1,771,387 Freysinger July 22, 1930 10 1,902,343 Shaw Mar. 21, 1933 2,131,458 Turner Sept. 27, 1938 2,164,290 Hurd June 27, 1939 FOREIGN PATENTS 15 Number Country Date 444,134 Great Britain 1- Mar. 16, 1936

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