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Publication numberUS3240040 A
Publication typeGrant
Publication dateMar 15, 1966
Filing dateJan 13, 1964
Priority dateJan 13, 1964
Publication numberUS 3240040 A, US 3240040A, US-A-3240040, US3240040 A, US3240040A
InventorsWilson William B
Original AssigneeNat Lock Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door lock construction
US 3240040 A
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Description  (OCR text may contain errors)

March 15, 1966 w. B. WILSON DOOR LOCK CONSTRUCTION 2 Sheets-Sheet 1 Filed Jan. 13, 1964 In z/rz for March 15, 1966 w. B. WILSON DOOR LOCK CONSTRUCTION 2 Sheets-Sheet 2 flflarna ys.

Filed Jan. 13 1964 United States Patent ()fiice didhfidb Patented Mar. 15, 1966 3,240,040 DUDE LOCK CONSTRUCTHGN Wiliiarn E. Wilson, La Habra, Calii'., assignor to National Lock (30., Rockford, Ill., a corporation of Delaware Filed Jan. 13, 1964, Ser. No. 337,377 Claims. (Cl. 7tl-i46) The present invention relates to a builders door lock and more particularly to a novel lock set construction embodying a simplified basic assembly of inner and outer knobs, a housing consisting of spaced clamp plates adjustably clamped to the opposite sides of the door, and novel locking means actuated by a turn button on the inner knob for locking the outer knob against rotation and unauthorized opening of the door from the exterior, and means for releasing the locking means for access from the exterior.

Among the objects of the present invention is the provision in a lock set having a latch bolt and retractor, of a novel internal tube assembly including an outer slotted cam tube upon which the outer knob is mounted, an inner tubular member rotatably aflixed to the cam tube and upon which the inner knob is mounted, and a novel looking means actuated by a turn button in the inner knob for locking the outer knob and cam tube against rotation and retraction of a retractor and latch bolt.

Another object of the present invention is the provision of a novel lock assembly for operating a latch bolt and retractor including a novel internal mechanism having an outer cam tube to which is aflixed the outer knob, an inner tube to which the inner knob is afiixcd and removably connected to the outer cam tube for unit operation whereby the inner knob and its tube are adapted to rotate the cam tube whereby rotation of either tube by its knob retracts the latch bolt, and novel locking means for rendering inoperative the cam tube but permitting release of the cam tube and its knob for rotating the cam tube and retracing the latch bolt.

The present invention further comprehends providing the outer knob of the present novel lock assembly with a key-operated cylinder lock and means for releasing the cam tube and permitting the latter to be rotated by turn- ,ing of its knob to retract the latch bolt.

Further objects are to provide a construction of maximum simplicity, efficiency, economy and ease of assembly and operation, and such further objects, advantages and capabilities as will later more fully appear and are inherently possessed thereby.

In the drawings:

FIGURE 1 is a view in horizontal cross section of a builders lock or lock set with the latch bolt retractor removed and in which the outer knob is provided with a cylinder look and the inner knob with a turn button for locking the outer knob against turning but permitting the latch bolt to be retracted and the door to be opened from the exterior by use of the proper key.

FIG. 2 is a vertical cross section taken approximately on the line 2-2 of FIG. 1 and showing the latch bolt and retractor.

FIG. 3 is a disassembled view of the outer knob, key lock assembly and associated parts, including the outer knob, cylinder lock, outer escutcheon, outer clamp plate and the cam tube, the outer knob, escutcheon and clamp plate being shown in cross section.

FIG. 4 is a disassembled View of the inner knob and related assembly, including the inner tubular member, turn button assembly, inner clamp plate, inner escutcheon, inner knob and locking bar assembly, the inner clamp plate, escutcheon knob and locking member being shown in cross section.

FIG. 5 is a top plan view of the outer cam tube shown in side elevation in FIG. 3.

FIG. 6 is a view in end elevation of FIG. 5.

FIG. 7 is an enlarged view in vertical cross section of the locking member, the view being taken on the line 7-7 of FIG. 1.

FIG. 8 is a view in end elevation of the turn button assembly.

FIG. 9 is a side elevation of FIG. 8.

FIG. 10 is a view in end elevation of the inner tubular member.

FIG. 11 is a top plan view of the inner tubular member shown in side elevation in FIG. 4.

Referring more particularly to the disclosure in the drawings in which the components of the novel basic assembly include an outer knob 10, an inner knob '11, a longitudinally slotted cam tube 12 on which the outer knob it is mounted, an inner longitudinally slotted tubular member 13 to which the inner knob 11 is staked, locking means carried in said outer and inner tubular members 12 and 13, a latch bolt assembly 14 and a bolt retractor 15. The longitudinally slotted cam tube 12 is provided with an inner arcuate projection 16 having its intermediate edges bent or folded back to provide a rollback comprising spaced camming members 17 and 18 for retracting a latch bolt 19 of the latch bolt assembly '14 upon rotation of the cam tube 12 in either direction. Such retraction is effected by turning whichever knob 1th or 11 is free to be turned and carrying therewith the slotted cam tube 12 to retract the bolt retractor 15 and its latch bolt 19 of the latch bolt assembly 14.

In the disclosed embodiment, the outer knob assembly includes the knob lit, the outer escutcheon 21, and outer clamp plate 22 having an internally threaded round stud 23 and an internally threaded square stud 24. having their heads 25 mounted in the recessed portion 26 of the outer clamp plate 22.

The basic inner knob assembly includes the inner knob 11, an inner escutcheon 27, an inner clamp plate 28, and the inner tube or tubular member 13, the inner clamp plate 2% being provided with attaching screws 29 projecting through keyhole slots in the inner clamp plate 28 and received in the internally threaded studs 23 and 24 whereby the inner and outer clamp plates 22 and 28 provide a housing. The inner knob ll is staked to the inner tube 13 by an annular expansible spring 34] having a projection 31 adapted to be projected through aligned transverse slots 31 and 31 in the tubular member 13 and reduced neck of the knob 11 opposite its longitudinal slot 26, the latter receiving a detent 31 on the neck of the knob 11 projecting in the slot 29 to maintain the knob ill and the inner tube against relative rotation.

The outer knob 10 is also ailixed or staked to the outer or cam tube 12 by an expansible spring 30 having a projection 31 extending through a transverse slot 31 in the tube 12 and received in a transverse slot 31' in the neck of the knob 10, and a detent 31 in the longitudinal slot 32.

The outer tubular member or slotted cam tube 12 (FIG. 5) is provided with the longitudinal slot 32 to receive the lateral projection 33 of a conventional key-operated lock plug and cylinder 34 provided with an inner plug ring 35, the latter having a slot 36 adapted to conformably receive the flattened outer end 37 of an elongated locking bar 38 projecting through the inner tubular member 13, the other end 39 of the locking bar received in an elongated slot 40 in a plastic rod or cylindrical member 41 provided with a turn button 42 rotatable in the open inner end of the tubular member 13 and projecting through and rotatable in an opening 43 in the inner knob ill. As shown in FIGS. 1 and 3, the opening a or slot 36 in the inner plug ring 35 receiving the flattened end 37 of the locking bar 38 is larger than the fiattened end 37 permitting a limited amount of relative rotation between the locking bar 38 and the inner plug ring 35.

The locking bar 38 and associated turn button assentbly includes a washer 44 positioned on the cylindrical portion 45 of the locking bar 38 adjacent its outer reduced or flattened end 37 and retained thereon by spaced pins 46. Also pinned to but movable longitudinally of the cylindrical portion of the locking bar 38 forwardly of the washer 4 1 by a pin 47 is a locking member 43 provided with an inclined or spiral slot 49 receiving and through which projects the pin 47 whereby turning of the turn button 42 and its connected locking bar 33 through approximately 90, the locking member 48 is movable longitudinally along the locking bar 38. This locking member (FIGS. 4 and 7) is in the form of a split collar provided with a lateral projection 51 having a tapered leading edge 52 received and slidable in the slot 32 of the cam tube 12 and adapted to be projected and guided into a slot 53 in the cylindrical neck 54 of the outer fixed clamp plate 22.

The locking member 48 is also provided with a recess receiving a ball or detent 55 adapted to be received in an aperture 56 of lesser diameter than the ball or detent 55, the aperture being in the circumferential wall of an encompassing locking sleeve or spring 57 (FIG. 7).

The forward or inner flattened end 39 of the locking bar 38 projects through a slot 58 in the end cap or washer 59 in the adjacent end of the inner tubular member 13 and into the slot 40 of the cylindrical member 41, and the arcuate end 16 of the cam tube is conformably received and projects through the arcuate slot 61 in this end cap 59.

The adjacent ends of the cam tube 12 and of the inner tube 13 are each provided with transversely spaced embossments or stops 61 adjacent the inner end of the outer and inner clamp plates 22 and 28, respectively, thereby retaining these clamp plates in assembled relation on the tubes 12 and 13 and within a bore in the door A. These clamp plates are spaced apart a distance depending upon the thickness of the door.

The latch bolt assembly 14 contains a flexible retractor mounted in a tubular latch bolt housing 62 having a fixed tail piece 63 provided with a conforming opening in a projection 63 through which the square stud 24- projects for securely mounting and retaining the latch bolt assembly 14 and its retractor 15 in assembled relation, the retractor being rigidly staked at one end 645 to the latch bolt 19.

The bolt retractor 15 is of flat spring metal with spaced resilient or flexible legs 65 and 66 projecting rearwardly through the tubular housing 62 and located in conforming slots in the tail piece 63. These legs at their inner or rearward ends are bent outwardly and rearwardly at 67 and 68 and then bent inwardly to provide relatively wide shoulders 69 and 71 maintained in contact with the spaced camming members or rollbacks 17 and 18 on the cam tube 12. The ends of the legs are then bent rearwardly at 72 and 73 with one end 74 bridging and connecting the other end to retain these ends against disengagement. While the portions 67 and 68 when distended or flexed are of greater width than the housing 62 and bore into which the latch bolt assembly is inserted from the exterior, these portions are readily compressed for projection through the bore.

The latch bolt assembly is insertable into the bore in an opening in the edge of the door A conforming to the shape and size of the tubular housing 62 and anchored in the edge of the door by a face plate 75.

In the operation of the present lock set assembly, the door may be locked to the exterior from the interior by turning the turn button through an arc of approximately 90. This causes the plastic member 41 to turn the locking bar 38 and cam and move the locking mem- All.

her 48 longitudinally or outwardly approximately Mi inch causing its lateral projection 51, which rides in the longitudinal slot 32 in the cam tube 12, to enter the aligned slot 53 in the fixed clamp plate 22 and thereby prevent the outer knob 10 and its cam tube 12 from rotating. The limited relative rotation of the locking bar 33 allowed by the enlarged slot 36 in the inner plug ring 35 allows actuation of the locking member 48 to its locked position. However, by the use of the proper key in the cylinder lock 34, turning of the key causes the plug ring 35 to rotate and it in turn rotates the locking bar 38 to longitudinally move and withdraw the locking member 48 from engagement in the slot 53 in the fixed clamp plate 22, permitting the outer knob 11 and its cam tube 12 to be rotated to actuate and withdraw the latch bolt.

While the drawings show the present lock assembly embodied in a key-operated privacy lock set having a turn button, it will be evident that this assembly may be utilized in a privacy lock without key-operating mechanism in the outer knob. Also by omitting the turn button 42 with its rod or member 41 and its associated locking bar 38 and locking member 4-8, the basic assembly omitting these parts may be utilized in a passage door lock set where either knob remains free to turn and retract the latch bolt. This greatly simplifies the cost of manufacture, assembly and the invoice of parts since standardized parts may be employed. If either knob requires no opening such as for the key lock or turn button, a plain knob may be employed or the opening of the knobs shown closed by a suitable insert.

Having thus disclosed the invention, 1 claim:

1. A lock set construction adapted for mounting in a bore of a door, comprising a latch bolt assembly having a retractor, an outer longitudinally slotted cam tube, an outer knob, escutcheon and clamp plate mounted on said cam tube, an inner tubular member, an inner knob, escutcheon and clamp plate mounted on said inner tubular member, means for mounting said clamp plates in spaced relation to bridge the opposite sides of the door, said outer cam tube having an arcuate projection and circumferentially spaced cam surfaces intermediate the ends of the cam tube engaging and actuating said retractor to retract the latch bolt when said cam tube is rotated, said inner tubular member having an end cap on the inner end forming an arcuate slot complementarily receiving the arcuate projection on the outer cam tube so that the outer cam tube and inner tubular member rotate simultaneously, a rod mounted in the inner tubular member and provided with a turn button at one end and rotatably mounted in the inner knob, a locking bar having one end connected to the opposite end of said rod and rotatable therewith, a locking member mounted on and longitudinally slidable along said locking bar between locking and unlocked positions as the locking bar is rotated, said locking member having a lateral projection received in the slot of the cam tube and cooperable with the fixed outer clamp plate for locking the outer cam tube and outer knob against rotation, and means in the outer knob and cam tube for engaging the other end of said locking bar to rotate the latter and cause withdrawal of the locking member from its locking position to release the outer cam tube and outer knob for rotation.

2. A lock set construction as set forth in claim 1, in which said locking member includes a spiral slot, a detent in the locking member and a locking spring encompassing the locking member, and a pin on said locking bar received in the spiral slot to cause longitudinal movement of the locking member upon rotation of the locking bar.

3. A lock set construction as set forth in claim ll, in which said last mentioned means includes a keyoperated cylinder lock having an inner plug ring with an opening therein, and said locking bar having a flattened end received in the opening in the inner plug ring, said opening being sufficiently large to allow limited relative rotation between said locking bar and said inner plug ring.

4. A lock set construction as set forth in claim 1, in which said rod is formed of a plastic material and has an elongated slot in the end opposite the turn button, and said locking rod has a flattened end received in said elongated slot to provide simultaneous rotation.

5. A lock set construction as set forth in claim 1, in which said outer clamp plate has a slot normally aligned with the longitudinal slot in the outer cam tube, said lateral projection on said locking member received in the slot in the cam tube for longitudinal movement therein and movable into the aligned slot in the outer clamp plate to prevent rotation of the cam tube and outer knob.

References Cited by the Examiner UNITED STATES PATENTS Huffman 70-146 Gilbert 70-216 Duvall 292358 Duvall 292-169 Cetrone et al 292-469 Patriguin et al. 70146 X 10 ALBERT H. KAMPE, Prim ry Examiner.

BOBBY R. GAY, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1395414 *Feb 19, 1919Nov 1, 1921 L huffman
US2803958 *Feb 11, 1955Aug 27, 1957Samuel GilbertDoor latch and lock mechanism
US3042437 *May 9, 1960Jul 3, 1962Duvall Walter JPassage set
US3105712 *Feb 10, 1961Oct 1, 1963Duvall Walter JPrivacy set
US3125366 *Aug 11, 1960Mar 17, 1964 Latch mechanism
US3128115 *Jul 21, 1959Apr 7, 1964Independent Lock CoResidential lock assembly
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4169618 *Nov 21, 1977Oct 2, 1979Norris IndustriesPlastic door lock
US4784417 *Feb 9, 1987Nov 15, 1988W & F Manufacturing, Inc.Door latch and deadbolt assembly
US4852922 *Jul 15, 1987Aug 1, 1989Shih Nan CTubular door lock with a bell
US6676178Apr 13, 2001Jan 13, 2004Imperial Usa, Ltd.Door lock assembly having escutcheon with removable posts
Classifications
U.S. Classification70/475, 292/169.17, 70/216, 70/477
International ClassificationE05B55/00
Cooperative ClassificationE05B55/005
European ClassificationE05B55/00C