US2795948A

US2795948A - Standard chassis lock hardware for passage set and privacy lock

Info

Publication number: US2795948A
Application number: US276774A
Authority: US
Inventors: Rayburn Alden Granville
Original assignee: VICTOR M CARTER
Current assignee: VICTOR M CARTER
Priority date: 1952-03-15
Filing date: 1952-03-15
Publication date: 1957-06-18
Anticipated expiration: 1974-06-18

Description

June 18, 1957 A. G. RAYBURN 2,795,948

STANDARD CHASSIS LOCK HARDWARE FOR PASSAGE SET AND PRIVACY LOCK Filed March 15. 1952 ATTORNEYS.

INVENTOR.

WN l

HUE BNE R, WORREL X HERZ! ALoEN GRANVILLE R41/BURN,

k. .NNN MM No. i.-

im. mw, mm

June 18, 1957 A. G. RAYBURN STANDARD CHASSIS LOCK HARDWARE FOR PASSAGE SET AND PRIVACY LOCK Filed Maron 15. 1,952 s snets-snee JNVENToR. HUEBNER BEEHL ER, WOR/PE1. s,

A DE N GRNV/LLE RA YBURN,

alla", [Il

HERZ/G, y ATTORNEYS June 18, 1957 A. G. RAYBURN STANDARD -CHASSIS LOCK HARDWARE FOR PASSAGE SET AND PRIVACY LOCK Filed March 15, 1952 3 Sheets-Sheet 5 ALDEN GRANVILLE RAYBURA INVENTOR.

HUE BNE R, BEEHL ER, WORREL 8 HERZ/G,

0 NE KS. 5b ATT R NNN STANDARD CHASSIS LOCK HARDWARE FORA PASSAGE SET AND PRIVACY LOCK Alden Granville Rayburn, West Los Angeles, Calif., assignor to Victor M. Carter, Van Nuys, Calif.

Application March 15, 1952, Serial No. 276,774

12 Claims. (Cl. 70-146) The invention relates to lock hardware and has particular reference to lock hardware of currently popular construction which is frequently identified as cylinder lock hardware. This hardware is characterized by a cornpactness of design in that the portions of the lock set 1ocated within the door are kept relatively small and in axial alignment with the spindles and knobs and wherein the latch housing is ordinarily manufactured as a separate assembly for insertion into the device when the hardware is tted to a door. The hardware in question is further characterized by a construction permitting it to be applied to doors of varying thickness.

In the manufacture of hardware of this type heretofore the construction has been such as to require a substantially precise fitting of the parts to the end that rather careful and precise machining has been necessary in order to assure the hardware being operable under all conditions and for long periods of time. The precision heretofore required has made such hardware relatively expensive as compared to hardware previously used. Numerous cast parts have been needed to iit intricate designs and other parts have necessarily been made of bar stock, tubing and forgings, all of which have added considerably to the initial cost of materials incorporated into those items of hardware. The precise design has also complicated factory assembly problems, thereby increasing the cost, and the precision of operation required has made it diicult to assure hardware of that manufacture operating when installation jobs have been ineiciently performed.

It is therefore among the objects of the invention to provide a new and improved lock set which is relatively inexpensive to manufacture and assemble and which is relatively simple to install with assurance of proper and continued operation under virtually all circumstances.

A primary object of the invention moreover is to use the latch housing as the centering medium for the lock installation rather than the door, thereby providing a steel unit mounting which is not subjected to the expansion and contraction of the wood in the door.

Another object of the invention is to provide a new and improved lock set wherein the parts are largely constructed of stampings and wherein the design is such that the tting of the parts need not be excessively precise, thereby facilitating assembly -of such parts as stampings in a manner to produce a device, the eiiciency and ruggedness of which is comparable to or better than constructions heretofore available.

Still another object of the invention is to provide a new and improved lock set wherein the spindles, spindle cage and latch assembly are made to a suiciently standard pattern so as to be usable with no more than slight variations at the most in a variety of lock sets suited to a number of different uses.

Still another object of the invention is to provide a new and improved lock set of inexpensive manufacture which is rugged in its construction, versatile in its uses and adapted to be installed in good operating condition united States Patent ice by persons not specially skilled in theinstallation of such devices.

With these and other objects in view, the inventionconsists in the construction, arrangement and combination of the various parts of the device whereby the objects contemplated are attained, as hereinafter setl forth, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings:

Figure l is a longitudinal sectional view of one yform of the device constructed as alpassage set showing the device installed in a door.

Figure 2 is a longitudinal sectional view taken on the line 2 2 of Figure l.

Figure 3 is a cross-sectional view taken on the line 3 3 of Figure 2.

Figure 4 is a fragmentary cross-sectional view taken on the line 4 4 of Figure 2.

Figure 5 is a cross-sectional view taken on the line Y5 5 of Figure 2.

Figure 6 is a perspective exploded view of one spindle and a portion of the cage.

Figure 7 is a longitudinal sectional view of a modified form of the device.

Figure 8 is a partial longitudinal sectional view taken on the line 8 8 of Figure 7.

Figure 9 is an end view of the central portion of the knob taken on the line 9 9 of Figure 7.

Figure l() is a partial cross-sectional View taken on the line 1(2 16 `of Figure 8.

Figure l1 is a partial cross-sectional view taken on the line 1l 11 of Figure 8.

Figure 12 is a perspective view of the cage in assembled position of its parts.

In the design and construction of the invention here involved, special attention has been given to so fabricating the several parts that they can be assembled without the use of bolts, rivets, and comparable permanent connections. To this end the parts have been largely designed so that they can be readily made of sheet metal by stamping or spinning, if need be, and provided with conigurations at appropriate locations so that the parts can be interfitted by extending one part into another and then locking the part in place by rotation. The principle suggested has been employed in the sub-assembly of the working parts of the device and also has been employed in such a fashion that the ultimate assembly of the lock set in the door can be accomplished in a substantially similar fashion, employing in all only two screws to fasten the lock set in the door.

Having in mind the construction of the several parts as being one of stampings, the partshave been made relatively large so as to maintain a suicient rugged character even though constructed of relativelyy thin sections. Employment of thin sections permits ready and inexpensive manufacture in the initial stages and at the same time has been found to greatly improve the smoothness `of continued operation over extended periods. It will further be found that the parts need not be specially made for right and left hand tits to the end that the parts being so standardized -need not be carried in heavy inventories, though at the same time capable of being assembled into combinations for a wide variety of uses.

In `an embodiment chosen to illustrate the invention there is shown in assembled position, particularlyin Figures l and 2, what is currently identified as a passage set, this being merely a pair of knobs and a latch so arranged that the latch can be releasedto openthe door,` using either knob, but in which there is no provision for locking the door in any way. VAs shown in the drawings, thelock set includes a central cage indicated generally bythe Vreference' character 10 and shown in perspective in Figure 12.

The central cage is adapted to have a latch housing 11 connected therewith so as to be operated by either an outside knob 12 or an inside knob 13. Figures l, 2 and 3 show the location of the parts in a door 14. Inasmuch as the parts of both knob devices are identical, it is felt that a description of only one will be necessary in connection with the passage set. In this set the latch assembly is contemplated as being one of commerically known construction wherein a latch bolt 15 is withdrawn by movement of a latch actuator 16 in an outward direction.

The cage 10, which is adapted to accommodate'knob devices of identical construction on either side of the door, consists essentially of an inner housing generally indicated by the reference character 2) and an outer housing generally indicated by the reference character 21. The inner housing 20 may be described as generally cylindrical in form and constituting an enlarged inner cylindrical shell 22. As viewed in Figures l and 2 the cylindrical shell 22 is open at the right end and has an end wall 23 at the left end, there being provided a hollow cylindrical spindle boss 24 at the left end. At one side of the cylindrical shell, as best seen in Figure l2., there is provided a latch housing receiving aperture 25 substantially rectangular in shape and adapted to receive a reduced portion 26' of the latch housing. Inwardly extending lips 25' and 25 at the respective upper and lower edges of the aperture 25 serve to properly position and align the latch housing in the spindle housing. The latch housing receiving aperture is also visible in Figure 3.

Within the shell is a structure comprising leftand

righthand discs

26 and 27, respectively, identical in form and joined by a short arcuate piece 28. In each disc is a semi-circular spindle slot 29 having a lateral recess 30 therein and a transverse slot 31 in the

disc

27 and 32 in the disc 26 somewhat longer than the slot 31. The disc 26 is moreover provided with a shallow boss 33 adapted to interlock in a hole 34 of the side wall 23 as best seen in Figure l.

In each of the discs or

plates

26, 27 there is provided a pair of screw holes 3S with slots 36 opening thereinto, the screw holes 35 in the respective plates or discs being in axial alignment` Similar screw holes 37 are provided in the side wall 23 also in axial alignment with the screw holes 35. There may also be provided an aperture 38 in the yarcuate piece 28 adapted to receive a punched projection 39 in the wall of the shell 22.

A left-hand cylindrical spindle is shown in Figures 1 and 2 and illustrated in perspective in Figure 6. A cylindrical spindle 46 is shown on the right-hand side similar in all respects to the cylindrical spindle 45 here described in detail. The cylindrical spindle is shown constructed generally of sheet metal and bent round to substantially cylindrical form but providing a longitudinal slot 47 extending throughout its length. At the inner end of the cylindrical spindle is an arcuate end portion 48 having a perimeter shorter in length than the length of the respective spindle slot 29. On one side of the arcuate end is a. laterally projecting boss 49 having a slot 50 therein. The slot 50 is substantially the same width as the thickness of the plate 26 so that when the arcuate end portion 48 is extended into the spindle slot 29, the boss 49 will pass through the respectivev recess 30 and thereafter when the spindle is rotated, the slot will receive the side edge of the spindle slot and thereby lock the spindle in position. By providing a shoulder 51 on one side of the slot 50, the spindle may be anchored against endwise movement in either direction in the cage. Similiar shoulders 51 disposed about the circumference of the spindle 45 in the same plane serve 'as spacers to properly locate the spindle in the boss 24. They also provide a stop for positioning the knob on the boss.

At the other or outer end of the spindle there are provided slots 52 in order to allow the spindle a slight compressibility so that it can be inserted into a cylindrical sleeve 53 of the knob 12. The sleeve 53 is made of such length that it can slide snugly over the exterior of the spindle 45 and into the spindle boss 24 until it strikes against the Outer side of the shoulder S1. This construction centers the spindle with respect to the spindle boss and encourages smooth operation.

To secure the knob by means of the sleeve 53 to the spindle there is provided a resilient ring S4, shown on the left-hand side of Figures l and 2 and shown to particular advantage in Figure 5. The ring 54 is open at one side 55 and has on the other side a projection 56. The spindle is provided with a side aperture 57 and this is adapted to coincide with a side aperture 58 in the sleeve 53 so that the projection when extending through both apertures releasably secures the knob to the spindle.

To complete the construction of the cage there is provided an outer cylindrical shell 60 slightly larger than the shell 22 and adapted to be slid over the outside of the shell 22 and there retained in rotatable sliding relationship, one with the other. In assembly the shell 60 is slid into place and may thereafter be secured to the inner shell 22 by crimping the edge 61.

The outer shell 60 is provided with a substantially flat side wall 62 having a hollow spindle boss 63 centerably' positioned thereon adapted to receive the spindle 46 and sleeve 53 of the other knob 13. The outer shell 60, as best seen in Figures 3 and l2, is provided with a substantially rectangular latch aperture 64 which is located to substantially coincide with the latch aperture 25 but may preferably be somewhat longer than the aperture 25. At each side of the aperture 25 is a lateral notch 66 adapted to coincide with a lateral notch 67 in the latch aperture 64. Inasmuch as the shell 60 is rotatable with respect to the shell 22 the shells may be rotated one about the other until the notches coincide. In this position the apertures are adapted to receive the latch housing and at the same time admit passage through the notches of laterally extending bosses 68. These bosses are adapted to extend inside of the shell 60 adjacent the inner wall thereof as shown in broken lines in Figure 1, after which the

shells

69 and 22 are adapted to be rotated one with respect to the other so that the laterally extending bosses are interlocked with respect to the cage which, in the case of the embodiment herein presented, is an interlock behind the wall of the outer shell 60.

To secure the cage and attached parts in proper position in a transverse aperture 70 and latch aperture 71 of the door 14 there are provided left and right-hand escutcheon plates 72 and 73 respectively which are adapted to overlie the door. The escutcheon plates have each a relatively large central aperture 74 which is adapted to accommodate thc cylindrical spindle bosses 24 and 63 respectively. The spindle bosses may preferably be keyed to the escutcheon plates by some acceptable keying structure so that by rotating the escutcheon plates the coinciding

apertures

25 and 64 for the latch housing and also the screw holes 37 may be aligned. At opposite edges of each of the apertures 74 are provided slots 75 extending radially outwardly. The slots in the escutcheon plate 73 have been identiiied with the character 75' for convenience in description. When the escutcheon plates are to anchor the cage 10 in position, screw sleeves 76 are attached to the escutcheon plates by being slid into the radial slots so that recesses 77 of the screw sleeves are received in the radial slots. Inasmuch as the slots 75 extend outwardly a distance greater than the diameter of the screw sleeve, it will be appreciated that the screw sleeves can be slid in or out in order that they may be easily adjusted to the centering of the screw holes 37 and 35 of the cage.

Screws 78 are passed through the radial slots 75 in the right-hand escutcheon plate and these also may be adjusted in the slot so that they are properly centered with respect to the screw holes previously mentioned. The screws are adapted to threadably engage the screw sleeves and to be tightened in proper position, thereby andere pressing the escutcheonplates against thedoorwithfthe cage properly centered andv secured between/them.

Rosettes 80 on the left and 81Y on the right may be provided to finish oi the appearance, the rosettes having a snap-on relationship at the edges82 and 83 respectively.

The same basic chassis design maybe employed in a modified form of the invention wherein aprivacy latch has been added as -shown in Figure 7. All of theparts described in .connection with Figures l through 6, inclusive, are the same and have applied thereto the same reference characters except the left and right-hand knobs herein lidentiiied as an outer knob 12 and an inner knob 13.

The `privacy latch comprises essentially a means for locking the outer knob'12 against latch actuation while a button 90 is depressed. So that the door may, if necessity arises, be opened from the outside there is provided an access means embodied in a rotatable release spindle 91 which can be turned by an appropriate instrument in order to release the door latch, thereby to gain access to the room on the opposite side of the door.

Speciiically the privacy lock includes in addition to the button 90 a bar 92 of particular form, best illustrated in Figure 7. The bar has a longitudinal portion 93 which extends through the transverse slot 31 in'the plate 27. The portion 93 has at its inner end a` bracket-like appendage 94 onthe unattached end of which is a nger 95 forming a slot 96 between the iinger and the appendage. As indicated the appendage is contained within the transverse slot 32.

Adjacent the other end the bar is provided with a lever 97 connected to the bar by means of a pin 98 so that there maybe movement' between the bar and the lever. It will be noted, however, that the bar continues to extend outwardly so that a snap ring 98' thereon engages with an inside wall 99 of the button 90. A coiled spring'100 is positioned between the button'and a ring 101, the ring being secured in the cylindrical spindle 46 in an appropriate slot 102 provided therein. By this device the spring is biased so as to continually urge the bar and button toward the right as viewed in Figures 7 and 8.

When the bar and button are moved toward the right there is no engagement of the bar suiicient to prevent the knob 12' at the outside' from opening the'door by releasing the latch. To lock the outer knob"12"the button 9G is depressed. Depression of the button moves the bar from right to left and causes the bracket-like appendage to enga-ge the slot 47 of the cylindrical spindle45 and thus lock the spindle 45 and its attached knob 12 against rotation.

ln order to hold the privacy latch embodied in the bar 92 in latched position, the lever 97 is provided with a detent 105 upwardly bent as viewed in Figure'7. The detent is normally urged upwardly oroutwardly by a relatively light compression spring 106 kept in a recess 107 on the bar and bearing against the lower face of the lever.

When the button 90 is pressed inwardly, moving from right to left as viewed in Figures 7 and 8, the detent 105 passes beneath an adjacent edge of the ring 101 and then springs upwardly behind the ring. This will hold the privacy latch in a position preventing manipulation of the latch by the outer knob 12. It will not, however, prevent manipulation of the latch by turning the inner knob 13. This is for the reason that the bar does not lock the spindle 46 against rotation with respect to the cage. It is only the appendage 94 which causes the locking of the spindle 45. Rotation of the spindle 46 will, however, release the button and the bar 92. This is accomplished by reason of the fact that the detent 105 is retained only by a shoulder portion 108 of the ring 101, the remaining portion of the ring being removed as best seen in Figure ll. Therefore, as promptly as the spindle 46 is rotated far enough to move the shoulder la from its position adjacent the detent 105, the detent will `immediately be released and the 'button' 90 and bar `92will be urged outwardly or from left to right by action of the spring 100. "Ihef-button 90, passing as it does through a central hole 110 in the knob 13', is stopped at its outermostposition by engagement of a shoulder 111 of the button against the inwardly turned edge of the hole 110.

The access means heretofore identiiied as embodied in part inthe release spindle 91 is constructed in such a manner that at the inner end of the release spindle there is provided a bracket 115 carrying `at its outer end an .arcu- .ate latch actuator 116.l The latch actuator extends within the cylindrical spindle 45 through the spindle slot y2.9 and thence into .any interior chamber 1'17 lin the cage 10. As shown in Figure 7 the latch actuator` lies immediately adjacent the arcuate end' 4S of the spindle 45. At its outer end the release spindle has a bushing 118 iitted within an appropriate central aperture 119 of the knob 12 and is adapted to "receive the outermost end of the release spindle. A slot 120is provided in the bush'ing to give access t-o a screw driver, key or :other .appropriate instrument by means 'of which the release spindle may be rota-ted. To further .assist in positioning the release spindle there is provided a lateral bracket 121 adapted to engage against an inwardly extending projection 4122 in the wall of :the spindle 45.

When the release spindle is rotated as described, the latch actuator 116 is rotated so as to bear against the inner end :of the latch bolt, -thereby to withdraw Ithe latch bolt and permit the door to be opened. Manipulation of the release spindle will-not, however, release the privacy latch which must be released lby rotation of the knob 1:3. After this has 4been done, the knob 12 will then be able to withdraw the latch bolt and the part will be again in initial position.

There has accordingly been' described herein a standard chassis construction which can `obviously be made almost entirely of sheet metal stampings and spinnings and which, as has been demonstrated particularly by reference to the modified form illustrated in Figures 7 and 8, is

. capable of being adapted to uses other than use as a passage set and without change. Moreover, without change either in construction, mode of installation or operation, the parts :of the device can be assembled on those doors of varying thickness most commonly employed. Furthermore, as has been shown herein, the cylindrical spindles are interchangeable from one side to the lother of the latch since all necessary appendages, slots and form in general of one spindle are 'duplicated in the other to the end that both may be used in either position. The same remarks apply to the escutcheon plates, rosettes and also the knobs except to :the extent ythat knobs for the passage set need 4not be apertured. Should apertured knobs, however, be used for Ithe passage set of the same ty-pe as those suggested tor the privacy latch, the central knob apertures may be plugged if needbe by use of appropriate conventional caps.

While I have herein shown and described my invention in what I 'have conceived to tbe the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of my invention, which is not to lbe 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 my invention, what I claim as new and desire to secure by Letters Patent is:

il. A latch set for a door comprising a spindle cage, a latch housing and a latch therein engaging the cage and a pair of cylindrical spindles extending into `the cage on opposite sides thereof, said cage comprising an interior cylindrical housing having a latch-receiving aperture in the cylindrical wall, end .walls having arcuate spindle slots, an exterior cylindrical housing having a rotatable sliding iit .over the interior cylindricalhousing .and having a latch-receiving aperture in the cylindrical wall ot greater length th-an the first identified iatchreceiving aperture,

said latch-receiving apertures having lateral notches at the sides adapted to coincide atan initial position, an end wall on one .side `of said las-t .identified housing, each of said spindles having an arcuate end of lesser length than the corresponding spindle slot extend-ing through the spindle slot to a position of engagement with the latch and means interlocking with the Wall through which the arcuate end extends upon rotation to assembled position, said latch housing having means adapted to extend through said notches when in initial position and engaging behind the cylindrical wall of the `outer housing upon rotation of the housings relative to each other to assembled position, and anchor bolts engaging the housings for holding the housings in assembled position and 4for holding the cage 'in the door.

2. A latch set for a door comprising a spindle cage, a latch housing and a latch therein engaging the cage 4and a pair of cylindrical knob-carrying spindles extending vinto the cage on opposite sides thereof, .said .cage comprising an interior cylindrical housing having a latch-.receiving aperture in the cylindrical wall, end walls having arcuate spindle slots, an exterior cylindrical housing having a rotatable fit over the interior cylindrical housing land having a latch-receiving aperture in ythe cylindrical wall of greater length than the first aperture, said latch-receiving apertures having lateral notches 'art the sides .adapted to coincide at an initial position,` each of said spindles having an arcuate end extending through the corresponding spindle slot to a position of engagement with the latch Within `the cage. said. latch housing having laterally extending bosses adapted initially :to enter the lateral notches and engaging behind the cylindrical wall of the outer housing upon rotation of the housings relative to each other .to assembled position, and anchor bolts engaging the housings for holding the housings in assembled position and for holding the cage in the door.

3. A latch set for a door comprising a spindle cage, a latch housing and a latch therein engaging the cage and a pair of cylindrical knob-carrying spindles extending into the cage on opposite sides thereof, said cage comprising an interior cylindrical housing having a latchreceiving aperture in the cylindrical Wall, said wall having inwardly turned lips at opposite edges thereof for guiding and positioning the latch housing, end walls having arcuate spindle slots with lateral recesses therein, an exterior cylindrical housing fitted over the interior cylindrical housing and having a latch-receiving aperture in the cylindrical Wall coinciding with the first identified latch-receiving aperture, each of said spindles having an arcuate end of lesser length than the corresponding spindle slot extending through the spindle slot to a posii tion of engagement with the latch and a slotted lateral boss on the end adapted initially to enter the lateral recess and to lock behind the end wall of the cage upon rotation to assembled position, said latch housing being in engagement with the cage and the lips of the interior cylindrical housing in operative relation With the ends of the spindles, and anchor bolts engaging the cage for iholding the housings in assembled position and for holdthe cage in the door.

4. A latch set for a door comprising a spindle cage, a latch housing and a latch therein engaging the cage and a pair of cylindrical knob carrying spindles extending into the cage on opposite sides thereof, said cage cornprising an interior cylindrical housing having a latchreceiving aperture in the cylindrical wall, end walls having arcuate spindle slots with lateral recesses therein and a hollow cylindrical spindle-receiving boss on one of said end walls, an exterior cylindrical housing having a rotatable lit over the interior cylindrical housing and having a latch-receiving aperture of greater length than the first latch-receiving aperture, said latch-receiving apertures having lateral notches at the sides adapted to coincide at an initial position, an end wall on one side of said last identilied housing having a cylindrical spindle-receiving boss thereon, each of said spindles having an arcuate end of lesser length than the corresponding spindle slot extending through the spindle slot to a posit-ion of engagement with the latch and a laterally extending slotted boss on said end adapted initially to enter the lateral recess and having a locked position behind the respective end wall of the cage upon rotation of the arcuate end in the spindle slot to assembled position, said latch housing having laterally extending bosses adapted initially to enter the lateral notches of the latch-receiving apertures and having a position of engagement behind the cylindrical wall of the outer housing upon rotation of the housings relative to each other to assembled position, escutcheon plates having spindle holes and having lateral slots extending from said holes receiving and securing the heads of anchor bolts, the ends of said housings having transverse bolt holes in alignment when the housings are in assembled position and adapted to receive the anchor bolts for holding the housings in assembled position and for holding the cage in 'the door.

5. A latch set for a door comprising a spindle cage, a latch housing and a latch therein engaging the cage and a pair of cylindrical knob-carrying spindles extending into the cage on opposite sides thereof, said cage having a latch-receiving aperture, a side wall and end Walls having spindle slots and transverse bar receiving slots, said latch housing being secured in said aperture in operative relationship to the spindles, said spindles each having an inner end adapted to be engaged in the spindle slots and in engagement with the latch, and a privacy latch on an inside spindle comprising a bar lying Within said inside spindle, Ia depressible button fixed on said bar at the outer end of the inside spindle, a lever pivoted for transverse movement on the bar adjacent the button and a spring-pressed detent on the lever engageable endwise with a portion of the spindle in one position of rotation thereof and adapted to be released in another position of rotation, the other spindle having a bar receiving slot therein and said bar having an inner end engaging the bar receiving slots in the cage and the other spindle when in depressed position thereby to lock the other spindle against latch actuating rotation.

6. A latch set for a door comprising a spindle cage, a latch housing and a latch therein engaging the cage and a pair of cylindrical knob-carrying spindles extending into .the cage on opposite sides thereof, said cage having a latch-receiving aperture, a side wall and end walls having spindle slots and transverse bar receiving slots, said latch housing being secured in said aperture in operative relationship to the spindles, said spindles each having an inner end in the corresponding spindle slot and in engagement with the latch, and a privacy latch on an inside spindle comprising a bar lying within said inside spindle, a depressible button xed on the bar at the outer end of the inside spindle, a lever pivotally mounted for transverse movement on the bar adjacent the button and a spring-pressed detent on the lever engageable end- Wise with a portion of the spindle in one position of rotation thereof and adapted to be released in another position of rotation, the other spindle having a bar receiving slot therein and said bar having an inner end engaging the bar receiving slots in the cage and the other spindle when in depressed position thereby to lock the other spindle against latch actuating rotation, and access means comprising a rotatable latch release extending through said other spindle and through the respective spindle slot into the cage and having a part thereof rotatably mounted in the cage for potential engagement with the latch` 7. A latch set for a door comprising a spindle cage, a latch housing and a latch therein engaging the cage and a pair of cylindrical knob-carrying spindles extending into the cage on opposite sides thereof, said gage comprising an interior cylindrical housing having a latch-receiving aperture in the cylindrical Wa'll, end walls having arcuate spindle slots and transverse bar receiving slots, an exterior cylindrical housing tted over the interior cylindrical housing and having a latch-receiving aperture in the cylindrical wall thereof substantially coinciding with the rst identified aperture, said latch housing being secured in said apertures in operative relationship to the spindles, said spindles each having an arcuate inner end engaged in the spindle slots and in engagement with the latch, and a privacy "latch on an inside spindle comprising a bar lying within said inside spindle, a depressible button on the bar at the outer end of the spindle, a lever pivotally mounted on the bar at a location between the inner end of the bar and the button and a spring-pressed detent on the lever engageable endwise with a portion of the spindle in one position of rotation thereof and adapted to be released in another position of rotation, the other spindle having a transverse slot therein and said bar having an inner en'd engaging the transverse slots in the cage and the other spindle when in depressed position thereby to lock the other spindle against latch actuating rotation, and access means comprising a rotatable latch release extending through said other spindle into the cage for potential engagement with the latch.

8. In a latch set for a door, a cage narrower in width than the smallest door thickness to which the set may be applied, the cage being adapted to receive a latch and spindles in operating relationship therein, said cage comprising a pair of complementary housings fitting one against the other, each housing having at least one side wall and at least two sets of holes in the side walls adapted to coincide only when the housings are in a correct assembled relation, an escutcheon plate for each side of the door, each plate having a large central opening, the opening in at least one plate having recesses extending radially from the opening and spaced circumferentially to align with the sets of holes in the cage, and bolt elements adapted to slide into the radially extending recesses in said one plate to positions of coincidence with the sets of holes and bolts extending through the other plate and into engagement with the respective bolt elements thereby to anchor the cage in the door.

9. In a latch set for a door, a cage narrower in width than the smallest door thickness to which the set may be applied, the cage being adapted to receive a latch and spindles in operating relationship therein, said cage comprising a pair of telescoping cylindrical housings having a rotating lit one over the other, each housing having at least one side wall and at least two sets of holes in the side walls adapted to coincide only when the housings are in a rotatively correct assembled relation, an escutcheon plate for each side of the door, each plate having a large central opening, each plate having recesses extending radially from the opening and spaced circumferentially to align with the sets of holes in the cage, bolt sleeves having slotted heads adapted to slide into the radially extending recesses in one plate to positions of coincidence with the sets of holes and bolts extending through the other plate and into the respective bolt sleeves thereby to anchor the cage in the door.

10. In a latch set for a door, a cage comprising a spindle receiving cylindrical element having an aperture at the side, a second spindle receiving cylindrical element telescopingly mounted over the rst element and rotatable thereon, said second `element having an aperture at the side coinciding with said first aperture, a Ilatch member extending through said apertures into the cage, said latch member having anchor devices thereon receivable in the apertures when the elements are in an initial position and locking said latch member on the cage when said elements are in rotated assembled position in engagement with said anchor devices.

11. In a latch set for a door a cage narrower in width than the smallest door thickness to which the set may be applied, said cage comprising a pair of complementary housings fitting telescopingly one over the other from opposite sides and rotatable relative to each other to a limited degree, a composite hollow structure having parallel end plates and a connecting arcuate portion lying within said housings and forming an end wall on each side having iiat inner and outer surfaces, a substantially hollow cylindrical spindle for each housing having an arcuate inner end of less than 360, a first projection means on each spindle adjacent the inner end overlying the flat outer face of said end wall of the respective housing and a second projection means underlying the opposite at face of said same end wall, said same end wall having an arcuate slot therein greater in length than the length of and receiving the arcaute inner end of the spindle, said slot having recess means at the side adapted to receive the second projection means in one position of rotation whereby when the spindle is thereafter rotated to a new position said second projection means locks behind said same end wall to prevent withdrawal and said rst projection being adapted simultaneously to limit extension of said spindle into said cage.

12. In a latch set for a door a cage narrower in width than the smallest door thickness to which the set may be applied, said cage comprising a pair of complementary housings tting telescopingly one `over the other and mutu- -ally rotatable one with respect to the other, a composite hollow structure having an end wall for each housing and having opposite at faces, a substantially hollow cylindrical spindle for each housing having an arcuate inner end of less than 360, a rst projection means on each spindle adjacent the inner end overlying the adjacent flat face of said end wall of the respective housing and a second projection means underlying the opposite flat face of said sarne end wall, said same end wall having an arcuate Slot therein greater in length than the length of and receiving the arcuate inner end of the spindle, sai'd slot having recess means at the side adapted to receive the second projection means in one position of rotation whereby when the spindle is thereafter rotated to a new position said projection means lock on opposite sides of said same end wall thereby to limit both further insertion and withdrawal of the respective spindle from the cage, said housings having coinciding openings therein and a latch housing received in said openings with the inner end thereof against said arcaute inner end of the spindle in said new position of the spindle whereby to limit rotation of the spindle in the cage to a path of travel wherein the projection means remain locked.

References Cited in the tile of this patent UNITED STATES PATENTS 1,876,079 Schlage Sept. 6, 1932 1,981,289 Schlage Nov. 20, 1934 1,991,031 Schlage Feb. 12, 1935 2,242,508 Ching May 20, 1941 2,538,688 Heyer Ian. 16, 1951 2,650,123 Hopgood Aug. 25, 1953 2,664,306 Cerf Dec. 29, 1953