US3606422A

US3606422A - Lock assembly

Info

Publication number: US3606422A
Application number: US757311A
Authority: US
Inventors: Thomas F Hennessy
Original assignee: Newfrey LLC
Current assignee: Newfrey LLC
Priority date: 1968-09-04
Filing date: 1968-09-04
Publication date: 1971-09-20
Anticipated expiration: 1988-09-20

Abstract

A REVERSIBLE CYLINDRICAL LOCK ASSEMBLY HAVING AN OPERATING UNIT INCLUDING A CYLINDRICAL CASING CONTAINING A ROTARY OPERATING RING, A BOLT UNIT HAVING A HOUSING SUPPORTING A MOVABLE DEADBOLT, AND AN OPERATING LINK PROVIDING MOTION TRANSMISSION CONNECTION BETWEEN THE RING AND THE BOLT. MANUALLY OPERABLE INNER AND OUTER OPERATING ASSEMBLIES MOUNTED ON THE CASING IMPART ROTATIONAL MOVEMENT TO THE RING TO MOVE THE BOLT TO PROJECTED AND RETRACTED POSITIONS. FASTENERS RELEASABLY SECURE THE BOLT UNIT TO THE OPERATING UNIT AND ALSO SECURE THE OPERATING ASSEMBLIES TO THE LATTER UNIT. THESE FASTENERS ARE INACCESSIBLE WHEN THE BOLT IS PROJECTED AND IN ENGAGEMENT WITH AN ASSOCIATED STRIKE.

Description

' Sept. 20; 1971 T. F. HENNESSY 3,605,422

- LOCK ASSEMBLY Filed 56 4, 1968 v '2 Sheets-Sheet 1 Homes f. flellwify jag f 1M,

Sept. 20, 1971 T. F. HENNESSY 3,606,422

LOCK ASSEMBLY Filed Sept. 4, 1968 2 Sheets-Sheet 3 4% m4 ma /6 x Z0 a? 60 {@112 I I Zf v r 7% in United States Patent US. Cl. 292-139 25 Claims ABSTRACT OF THE DISCLOSURE A reversible cylindrical lock assembly having an operating unit including a cylindrical casing containing a rotary operating ring, a bolt unit having a housing supporting amovable deadbolt, and an operating link providing motion trans-mission connection between the ring and the bolt. Manually operable inner and outer operating assemblies mounted on the casing impart rotational movement to the ring to move the bolt to projected and retracted positions. Fasteners releasably secure the bolt unit to the operating unit and also secure the operating assemblies to the latter unit. These fasteners are inaccessible when the bolt is projected and in engagement with an associated strike.

BACKGROUND OF THE INVENTION This invention relates in general to locks and deals more particularly with an improved lock assembly of cylindrical type.

The general aim of the present invention is to provide an improved lock assembly of the aforesaid type for convienient assembly with doors of either hand to provide a high degree of security.

SUMMARY OF THE INVENTION 'In accordance with the present invention an improved lock assembly is provided for a door having an opening extending transversely therethrough and another opening in the edge thereof intersecting the transverse opening. The assembly includes an operating unit having a casing adapted to be received in the transverse opening and containing a bolt actuating mechanism which includes a rotary part or operating ring. The assembly also includes a bolt unit adapted to be received in the other opening and having a bolt therein arranged for movement between projected and retracted positions relative thereto. A connecting means operably associated with the bolt releasably engages the actuating mechanism to provide rigid motion transmission connection therebetween when the lock assembly is assembled with the door. At least one operating assembly mounted at one end of the transverse opening is provided for manually moving the operating mechanism to positions corresponding to projected and retracted positions of the bolt. A single fastener may be provided to secure the two units in assembly with each other and with the door and to retain the operating assembly in assembled relation with the operating unit so that the lock assembly cannot be removed from the door when the door is secured in a closed position by the bolt.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an edge view of a portion of a door and shows lock assembly embodying the present invention in assembly with the door.

FIG. 2 is a plan view of the lock assembly of FIG. 1.

FIG. 3 is a sectional view through the lock assembly taken generally along the line 3--3 of FIG. 2, the adjacent operating assembly being removed for clarity of illustration.

FIG. 4 is a sectional view through the lock assembly ice and the door taken generally along the line 44 of FIG. 3.

FIG. 5 is a fragmentary sectional view taken generally along the line 55 of FIG. 3.

FIG. 6 is a sectional view taken generally along the line 66 of FIG. 2.

FIG. 7 is a sectional view taken generally along the line 7-7 of FIG. 2.

FIG. 8 is a fragmentary sectional view similar to FIG. 7, but shows another embodiment of the invention.

FIG. 9 is a fragmentary view similar to FIG. 4, but shows the embodiment of FIG. 8.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings and particularly to FIGS. 1-4, a lock assembly embodying the present invention is indicated generally at 10. The lock assembly 10 is of a reversible cylindrical type for assembly with doors of either hand and is shown assembled in the right-hand edge portion of a door 12 having its adjacent edge 14 beveled or inclined as shown in FIG. 2. The lock assembly comprises a cylindrical operating unit 16, a bolt unit 18 and a link 20 providing a motion transmitting connection therebetween.

The operating unit 16, includes a cylindrical casing indicated generally at 22 received in a cylindrical opening 24 which extends transversely through the door 12. The casing 22 houses a bolt actuating mechanism, hereinafter described, and has manually operable inner and outer operating assemblies mounted thereon and generally indicated at 26 and 28, respectively, for operating the actuating mechanism.

The bolt unit includes a hollow housing 30 received in an opening 32 which extends through the edge 14 and communicates with the opening 24. A bolt or deadbolt 34 is slidably movable in the housing 30 to projected and retracted positions relative to the edge 14 for engagement with a strike (not shown).

Fasteners

36, 36 and associated

springs

37, 37 secure the operating unit 16 and the bolt unit 18 in assembly with each other and with the door 12 and also serve to secure the

operating assemblies

26 and 28 in mounted position on the operating unit, as will be hereinafter further discussed.

The operating unit 16 is reversible and symmetrical, the casing 22 being formed by two substantially

identical parts

40, 40. Each part 40 has a generally cylindrical body portion 42 and a coaxial bore 44 therethrough which is threaded to receive either of the

operating assemblies

26 and 28. A horizontally disposed threaded opening 46 extends radially inwardly through each body portion 42 for receiving an associated fastener 36, as shown in FIG. 2. At its inner end each part 40 also includes an annular flange 48 terminating in an inwardly projecting cylindrical wall 50. The two

parts

40, 40 are secured in assembled coaxial alignment and axially spaced relation by a plurality of circumaxially disposed

spacers

52, 52 staked to and extending axially betweent he flanges 48, 48 adjacent the

walls

50, 50. The

parts

40, 40 are spaced apart a distance substantially equal to the thickness of the link 20 and cooperate to form a generally cylindrical chamber 54 therebetween, best shown in FIG. 4. To aid in assemblying the operating unit 16 with the door 12 a positioning arrow 56 is imprinted on the side surface of each part 40 to indicate the location of the threaded openings 46, 46. The word top is also imprinted on the side surface of each part 40, as indicated at 58 in FIG. 2, to assure assembly in proper orientation with respect to the door.

The bolt operating mechanism includes an operating ring which is contained in and supported for rotation about a generally transversely extending axis by the operating unit casing and has at least one cam abutment associated with its inner periphery. In the illustrated embodiment 10, the operating ring indicated generally at 60 comprises a pair of substantially identical coaxially aligned and axially spaced

ring members

62, 62 retained in assembled relation by a plurality of circumaxially spaced

cylindrical pins

64, 64 which extend therebetween.

Each ring member 62 has an outside diameter substantially equal to the diameter of the chamber 54 and includes a cam abutment 66 on its inner periphery which has

abutment surfaces

68 and 70, as shown in FIGS. 6 and 7. Sectors of the outer periphery of each ring member 62 are relieved or cut away to accommodate the

spacers

52, 52 and to permit limited rotation of the operating ring 60 with the chamber 54. Each ring member 62 is supported for rotation in peripheral engagement with an associated wall 50 so that the operating ring 60 is movable to positions corresponding to retracted and projected positions of the bolt 34, shown in FIGS. 6 and 7 respectively, the

spacers

52, 52 serving as stops to limit ring rotation. A detent mechanism indicated generally at 72 in FIG. 2 and associated with one part 40 engages a recess in an associated ring member 62 when the operating ring 60 is in its bolt retracted position to releasably retain the ring in the latter position and thereby prevent the deadbblt 34 from being moved to projected position by vibration or by shock force applied to the door.

The operating assemblies may vary in form and may be employed in various combinations to attain desired deadbolt functions. However, as shown at least one of the assemblies is provided with a rotary part or cam supported for rotation about a generally transversely extending axis and having its axis eccentric to the axis of the operating ring or generally parallel to the axis of the operating ring and spaced therefrom. The rotary part includes at least one radial lug or cam lobe for engaging the cam abutment on the ring to actuate the bolt mechanism. Thus, for example, a deadlock made in accordance with the present invention may have a single active operating assembly positioned on one side of an associated door for actuating the deadbolt and an inactive or a dummy assembly associated with the opposite side of the door and which does not operably engage the bolt actuating mechanism.

The illustrated lock includes active inner and outer operating assemblies, the outer assembly 28 being a conventional pin tumbler lock cylinder assembly symmetrical about a vertical axial plane so that it may be assembled with the operating unit 16 on either side of a door. The cylinder assembly 28 includes a cylindrical shell 74 which is externally threaded for engaging an associated internally threaded bore 44 and has axiall extending

grooves

75, 75 formed in diametrically opposite sides thereof. A rotary part or key plug 76 extends through the shell 74 eccentric to the axis thereof to receive a 'key 77. At its inner end the key plug carries a cam 78 which includes a generally radially extending cam lobe or lug 79 for engaging an associated cam abutment 66. An annular collar 80, which includes an integral spring washer 82, and a rose 84 surrounds the shell 74 as best shown in FIG. 2.

The inner operating assembly 26 comprises a thumbturn cylinder which has an externally threaded and grooved shell 88 substantially identical to shell 74. However, a rotary part or spindle 90 which has an associated thumb plate 92 at its outer end is provided in place of the key plug 76. A cam 94 fastened to the inner end of the spindle 90 has two angularly spaced and generally radially extending cam lobes or

lugs

96 and 98 which receive an associated cam abutment 66 therebetween as best shown in FIG. 7. The spindle 90 is retained in selected angular position by a spring-ball mechanism indicated generally at 100, assembled in one of the pin tumbler chambers in the shell 88 and in frictional engagement with the spindle. Like the assembly 28, the assembly 26 also includes a collar 80 and a rose 84.

Further considering the bolt unit 18, this unit is also reversible being symmetrical about a horizontal median plane. The housing 30 is preferably generally cylindrical being adapted to be received in the opening 32. The inner end of the housing 30 has an arcuate face 104 for complementary engagement with the

flanges

48, 48 of the

casing parts

40, 40. As viewed from above (FIG. 2), the housing 30 has a stepped bore 106 which extends therethrough for receiving the deadbolt 34 in complementary sliding engagement therein.

Axially extending recesses

108, 108 in the housing 30 communicate with opposite sides of the bore 106 to accommodate the

fasteners

36, 36 extend inwardly through the housing. A generally rectangular plate 109 at the outer end of the housing 30 and inclined to the axis thereof complements the bevel of the edge 14 and has an opening therein through which the outer end of the bolt 34 projects.

Openings

110, 110 through the plate 109 on opposite sides of the deadbolt each respectively communicate with a recess 108 to permit access to an associated one of the

fasteners

36, 36 When the bolt unit 18 is assembled in the opening 32. A face plate 112 is provided for positioning adjacent the plate 109 to conceal the

openings

110, 110 when the lock unit 10 is assembled with the door 12. The outer or free end of the deadbolt 34 projects through an opening in the face plate 112.

The link 20 has an arcuate configuration, as shown, and is pivotally connected to the inner end of the deadbolt 34 which is bifurcated to form a clevis 113, a pivot pin 114 providing the connection therebetween, as best shown in FIG. 2. A hook formed at the inner end of the line 20 by a downwardly opening recess 116 engages an associated pin 64 on the operating ring 60 to establish operable connection therewith. At its inner end the link 20 has an upwardly and inwardly inclined surface 118 which aids in assembly of the bolt unit with the operating unit as will be hereinafter discussed. The link 20 is biased downwardly or in a clockwise direction as it appears in FIG. 7 by a spring 120 associated with the outer end of the link and bearing against a pin 122 which extends transversely of the clevis 113 above the pivot pin 114. Another pin 124 extends transversely of the clevis 113 below the link 20 to limit the travel of the link in the latter direction when the bolt unit 18 is out of assembly with the operating unit 16-.

Preparatory to installing the lock 10 on the door 12, the cylindrical opening 24 is bored transversely through the door 12. Thereafter, the opening 32, which is also preferably cylindrical, is bored from the edge 14 to communicate with the opening 24 and generally normal to the axis thereof. A generally rectangular mortise is also formed in the edge 14 surrounding the opening 32 to receive the plate 109 and the face plate 112, as best shown in FIG. 2.

One of the operating assemblies may be assembled with the operating unit 16' before the latter unit is assembled with the door. When the deadlock is made in accordance with the illustrated embodiment 10, it is preferable that the inner operating assembly 26 be first assembled with the operating unit 16, since such preassembly simplifies engagement of the

cam lobes

96 and 98 with an associated cam abutment 66. The operating unit 16 is inserted in the opening 24 from the inner side of the door properly oriented with respect to the door and with the arows 56-, 56 pointing in a direction normal to the edge 14. Thereafter, the housing 30 is inserted in the opening 32 and moved to its position of assembly with the operating unit 16. One of the

fasteners

36, 36 is inserted through the opening 110 and threaded into an associated opening 46 to engage shell 88 in its associated groove 75.

Preparatory to connecting the deadbolt 34 to the operating mechanism the thumb turn 92 is manipulated to rotate the operating ring 60 to a position corresponding to its projected bolt position, as it appears in FIG. 7. When the ring 60 is in the latter position, it should be noted that a pin 64 is generally aligned with the cylindrical opening 32 and below the axis thereof. The deadbolt 34 and its associated link 20 are inserted into the housing bore 106. When the link surface 118 engages the pin 64 aligned with the opening 32 the link 20 is biased upwardly and into hooked engagement with the latter pm.

When the key 77 is partially inserted in the key plug 76 the other operating assembly 28 may be freely threaded into the operating unit 16 using the key as a wrench. The key slot is adjusted to a vertically oriented position and it will be noted that the

spring washers

82, 82 permit the operating assemblies to be adjusted to properly aligned positions after each rose 84 has been brought into engagement with an associated side of the door 12. The other fastener 36 is next threaded into and through the other opening 46 to bring the end of the latter fastener into engagement with the shell 74 within its groove 75. Thus, in addition to securing the bolt unit in assembly with the operating unit the

fasteners

36, 36 serve to prevent the

operating assemblies

26 and 28 from being threaded out of assembly with the operating unit 16. The springs 37, 3-7 urge the bolt unit 18 toward engagement with the operating unit 16. The door and lock assembly is completed by fastening the face plate 112 in the mortise in the edge 14.

The lock unit 10 may be removed from the door 12 by performing the aforesaid operations in reverse order. However, it should be noted that the link 20 is disengaged from the operating ring 60 by rotating the entire operating unit 16 within the opening 22 in a counterclockwise direction as it appears in FIG. 7.

Considering now the operation of the lock 10 and referring again to FIGS. 6 and 7, the lock unit 10 is shown in FIG. 6 in an unlocked or bolt retracted condition, the position of the cam 78 when the key 77 is in its shed position being indicated by broken lines. The deadbolt 34 is moved to its projected position and locked in the latter position by rotating the key 77 in a counterclockwise direction from its shed position through 180 to its limit and reversing and withdrawing the key. This operating causes the cam lobe 79' to engage the cam abutment surface 68 to rotate the ring 60 to the posi tion shown in FIG. 7. When the deadbolt 34 is in its projected position the pin 64 associated with the link 20 is disposed below an imaginary line 125 which passes through the axes of the pivot pin 114 and of the operating unit 16, as shown in FIG. 7. In the illustrated embodiment the angular position of the latter pin 64 is approximately below the line 125 when the deadbolt 34 is in its projected position. Thus, the unit is positively deadlocked. That is, force exerted on the deadbolt 34 in the direction of the operating unit 16 will tend to urge the ring member 60 to rotate in a counterclockwise direction to its limit, as shown in FIG. 7, to maintain the deadbolt 34 in its projected or deadlocked condition. Reverse rotation of the key 77, or rotation in a clockwise direction, through 180 from the shed position causes the cam lobe 79 to engage the abutment surface 70 to return the ring member 60 to the position as shown in FIG. 6, after which the key may be reversed and withdrawn leaving the lock in its unlocked condition. It should be noted that when the key plug 76 is in the shed position, the cam 78 is in an inactive position out of engagement with the cam abutment 66 so that the bolt mechanism may be freely actuated by the thumb turn independently of the operating assembly 28.

When the bolt is in the projected position, as it appears in FIG. 7, rotation of the thumb turn 92 in a counterclockwise direction through 90 to its limit moves the deadbolt 34 toits retracted position. Reverse rotation of the thumb turn from the latter position 90 to its limit moves the deadbolt to projected position.

As previously noted, operating assemblies may be employed in various combinations to obtain desired bolt functions. For some purposes, it is desirable to provide a deadlock which may be locked from the outside of the door only, but which may be unlocked from either side at all times. In FIGS. 8 and 9 another look assembly or deadlock embodying the invention and arranged to function in the aforedescribed manner is indicated generally at 10a. The deadlock 10a is similar in most respects to the deadlock 10, previously discussed, and parts thereof which are substantially identical to parts previously described bear the same reference numerals with a suffix letter a and will not be further described.

The deadlock 10a includes an operating unit 16a, a bolt unit 18a and a link 20a providing motion transmission connection therebetween. The outer operating assembly may, for example, be substantially identical to the outer operating assembly or lock cylinder 28 of the lock 10. However, the inner operating assembly designated generally at 26a difiers somewhat from the inner operating assembly 26. Like the assembly 26 the assembly 26a is symmetrical about a vertical axial plane so that it is reversible for installation on doors of either hand. The assembly 26a includes a shell 74a substantially identical to the shell 74. However, a rotary spindle 126 which has an associated thumb plate 128 at its outer end and a recess '129 in its peripheral surface is provided in place of the generally similar spindle 90. A cam 130 secured to the inner end of the spindle 126 includes a single radially extending lobe 132. In FIG. 8 the cam 130 is shown in an inactive position out of engagement with the cam abutment 66a, the operating ring 60a being shown in bolt projection position. Rotation of the thumb plate 128 in a counterclockwise direction through to its limit causes the cam lobe 132 to engage the abutment surface 70a to move the operating ring 60a to its bolt retracted position.

A pin 134 projects axially outwardly from the shell 74a in the path of rotation of the cam lobe 132 to prevent rotation of the thumb plate '128 in the reverse or clockwise direction from its inactive position as it appears in FIG. 8 and thereby prevents movement of the operating ring 60a to bolt projected position. An opening 136 is provided on the opposite side of the cam lobe 132 for receiving the pin 136 when the operating assembly 16a is assembled with a door of opposite hand. The assembly 26a is provided with a spring ball detent mechanism indicated generally at 138 received in a pin tumbler chamber in the shell 74a. This detent mechanism engages the recess 129 when the cam 130 is in its inactive position and serves to releasably retain the spindle 126 in the latter position so that the outer operating assembly may operate freely and independently of the inner operating assembly 26a.

I claim:

1. A lock assembly for a door having an opening extending transversely therethrough and another opening in the edge thereof intersecting the transverse opening, said lock assembly comprising a bolt unit adapted to be received in said other opening and including a bolt movable to projected and retracted positions, an operating unit including a casing adapted to be received in said transverse opening and having a bolt actuating mechanism contained therein, said actuating mechanism comprising an operating ring having a cam abutment thereon and supported for axial rotation in said casing between first and second positions corresponding to projected and retracted positions of said bolt, connecting means operably associated with said bolt and releasably engageable with said actuating mechanism to provide rigid motion transmission connection therebetween, and inner and outer operating assemblies mounted on said casing at opposite ends of said transverse opening, at least one of said assemblies including a manually rotatable part having its axis eccentric to the axis of said operating ring, said part having a pair of angularly spaced and generally radially extending lugs thereon receiving said cam abutment therebetween for engaging said cam abutment to move said mechanism to said first and second positions, respectively, in response to rotation of said part in one and the opposite direction.

'2. A lock assembly for a door having an opening extending transversely therethrough and another opening in the edge thereof intersecting the transverse opening, said lock assembly comprising a bolt unit adapted to be received in said other opening and including a bolt movable to projected and retracted positions, an operating unit including a casing adapted to be received in said transverse opening and having a bolt actuating mechanism contained therein, said actuating mechanism comprising a pair of axially spaced ring members and a plurality of circumaxially spaced axially extending pins connecting sadi ring members, said ring members being supported in said casing for axial rotation in unison between first and second positions corresponding to projected and retracted positions of said bolt, at least one of said ring members having a cam abutment thereon, a link connected to said bolt and releasably engageable with an associated one of said pins to provide rigid motion transmission connection between said bolt and said actuating mechanism, and inner and outer operating assemblies mounted on said casing at opposite ends of said transverse opening, at least one of said assemblies having a manually rotatable part including at least one radially extending lug for engaging said cam abutment to move said mechanism to said first and second positions respectively in response to rotation of said part in one and the opposite direction.

3. A lock assembly for a door having an opening extending transversely therethrough and another opening in the edge thereof intersecting the transverse opening, said lock assembly comprising a bolt unit having a housing adapted to be received in said other opening and including a bolt supported in said housing for movement to projected and retracted positions relative thereto, an operating unit including a casing adapted to be received in said transverse opening and having a bolt actuating mechanism contained therein, said actuating mechanism comprising an operating ring supported in said casing for rotation about a generally transversely extending axis between first and second positions corresponding to projected and retracted positions of said bolt and having a cam abutment thereon, connecting means operably associated with said bolt and releasably engageable with said actuating mechanism when said bolt is assembled in the door to provide motion transmission connection between said bolt and said actuating mechanism, at least one operating assembly adapted for counting at one end of said transverse opening and including a manually rotatable part supported for rotation about a generally transversely extending axis, said part having at least one radially extending lug for engaging said cam abutment to move said mechanism to said first and second positions, respectively, in response to rotation of said part in one and the opposite direction.

4. A lock assembly as set forth in claim 3 wherein said rotatable part includes a pair of angularly spaced and radially extending lugs thereon receiving said cam abutment therebetween.

5. A lock assembly as set forth in claim 3 wherein said casing includes at least one wall partially defining a cylindrical chamber therein, said operating ring being supported in said chamber by said one wall for rotation in peripheral engagement therewith.

6. A lock assembly as set forth in claim 3 wherein said operating ring comprises a pair of axially spaced ring members and a plurality of circumaxially spaced axially extending pins connecting said ring members for rotation in unison and said connecting means comprises a link connected to said bolt and releasably engageable with an associated one of said pins.

7. A lock assembly as set forth in claim 3 wherein said connecting means comprises a link pivotally connected to said bolt and said operating ring.

8. A lock assembly as set forth in claim 3 including another operating assembly mounted at the other end of said transverse opening and having another manually rotatable part rotatable in one and the opposite direction for engaging and moving said mechanism only to said second position in response to rotation of said other part in said opposite direction.

9. A look assembly as set forth in claim 8 wherein said other part is rotatable to an inactive position out of engagement with said actuating mechanism and said assembly includes means for releasably retaining said other part in said inactive position, said one part being operable independently of said other part when said other part is in said inactive position. i

10. A lock assembly as set forth in claim 3 wherein said one operating assembly is a lock cylinder.

11. A lock assembly as set forth in claim 3 wherein said one operating assembly is a thumb turn cylinder.

12. A lock assembly as set forth in claim 3 including detent means for releasably retaining said actuating mechanism in said second position.

i 13. A lock assembly as set forth in claim 3 wherein said operating unit is symmetrical about a median plane therethrough.

14. A lock assembly as set forth in claim 3 wherein said bolt unit is symmetrical about a median plane therethrough.

15. A lock assembly as set forth in claim 3 wherein the openings in the door are generally cylindrical and wherein said housing and said casing are generally cylindrical and adapted to respectively complement associated portions of the other opening and the transverse opening.

16. A lock assembly as set forth in claim 3 wherein said rotatable part axis is generally parallel to and spaced from said operating ring axis.

17. A lock assembly as set forth in claim 3 wherein said connecting means comprises a link providing rigid motion transmission connection between said bolt and said actuating mechanism.

18. A lock assembly as set forth in claim 7 wherein said operating ring pivotal connection is angularly displaced in said one direction beyond an imaginary line extending through said ring axis and the axis of said bolt pivotal connection when said ring is in said first position and said bolt is projected.

19. A look assembly as set forth in claim 7 wherein said link includes a hook portion and said assembly includes an axially extending pin carried by said operating ring and eccentric to the axis thereof and biasing means for urging said hook portion into connected engagement with said pin.

20. A lock assembly as set forth in claim 18 including means for camming said link into connected engagement with said pin when said actuating mechanism is supported in said transverse opening and said bolt unit is inserted in said other opening and moved toward said actuating mechanism.

21. A lock assembly as set forth in claim 18 wherein said bolt is a deadbolt.

22. A lock assembly as set forth in claim 20 wherein said camming means comprises a cam surface defined by said link.

23. A lock assembly for a door having an opening extending transversely therethrough and another opening in the edge thereof intersecting the transverse opening, said lock assembly comprising a bolt unit having a housing adapted to be received in said other opening and including a bolt movable to projected and retracted positions relative to said housing, an operating unit including a casing adapted to be received in said transverse opening and having a bolt actuating mechanism contained therein and movable to first and second positions corresponding to projected and retracted positions of said bolt, connecting means operably associated with said bolt and releasably engageable with said actuating mechanism to provide rigid motion transmission connection therebetween, at least one operating assembly mounted on said casing at one end of said transverse opening, said one assembly having a manually rotatable part for operably engaging and moving said mechanism to said first and second positions respectively in response to rotation of said part in one and the opposite direction, and a fastener disposed in said other opening extending through said housing and said casing and engaging said one assembly to releasably secure said housing, said casing and said one assembly in assembled relation with each other and with the door, said fastener being accessible through said other opening and inaccessible when said lock assembly is assembled with the door and the door is in a closed position with said bolt in projected position and in engagement with an associated strike.

24. A lock assembly asset forth in claim 23 including a spring acting between said fastener and said housing for biasing said housing toward said casing.

25. A lock assembly as set forth in claim 24 wherein said fastener is a screw threadably engaging said casing.

References Cited FOREIGN PATENTS 6/1932 Great Britain.

IAN A. CALVERT, Primary Examiner R. L. WOLFE, Assistant Examiner US. Cl. X.R.

, P0-1050 STATES PATENT OFFECE o 1 v v CERT FifiATh OE: CORMELCTEUN Patent No. 3,606,422 .Dated Septemb r 2 1971 Inventor(s) Thomas F. Hennessy It is certified that error appears in the ahove-identified patent and that said Letters Patent are hereby corrected as shown below:

. C01. 2, line 59, "betweent he" should read --between the-,

C01. 3, line 15, "with" should read -within--,

C01. 4, line 12, after "36, 36', insert --which--,

Col. 4, line 64, "arows" should read -arrows--,

Col. 7, line 14, "sadi" should read --said-.

Signed and sealed this 21st day of March 1972.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Attestingg Officer- Commissioner' of Patents