US2958553A

US2958553A - Cylindrical locks

Info

Publication number: US2958553A
Application number: US560180A
Authority: US
Inventors: Phillips John Carroll
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-01-19
Filing date: 1956-01-19
Publication date: 1960-11-01
Anticipated expiration: 1977-11-01

Description

Nov. 1, 1960 Filed Jan. 19, 1956 J. C. PHILLIPS CYLINDRICAL LOCKS 3 Sheets-Sheet 1 V EN TOR.

ATTORNEYS.

NOV? 1, 1960 J. c. PHILLIPS 2,958,553

CYLINDRICAL LOCKS Filed Jan. 19, 1956 s Sheets-Sheet 2 ATTORNEYS Nov. 1, 1960 J. c. PHILLIPS 2,958,553

CYLINDRICAL LOCKS Filed Jan. 19, 1956 3 Sheets-Sheet 5 IN V EN TOR.

ATTORNEYS.

rates CYLINDRICAL LOCKS John Carroll Phillips, 1721 W. Crawford St, Tampa, Fla.

Filed .lan. 19, 1956, Ser. No. 560,180

13 Claims. ((Il. 292-169) This invention relates to locks, and more specifically to a cylindrical door lock of improved construction and operation.

One of the objects of the present invention is to provide a cylindrical lock which may be quickly and easily installed in a door without mortising or the inserting of screws. Another object is to provide a lock in which there are a combination of levers providing balanced latching and unlatching action so that the lock may be easily operated with a minimum amount of motion and effort. A further object is to provide a door lock which has less parts and which is easier to assemble than the conventional door locks presently in use. A still further object is to provide a door lock that has no visible screws or catches to detract from its appearance after it has been assembled and mounted in a door.

An additional object is to provide a basic lock structure which may be easily adapted for use as a key-operated lock, a push-button acutuated lock, a push-button and key-operated combination lock, etc. Another object is to provide a lock which can be operated by reciprocable as well as rotary motion, so that push buttons or other suitable reciprocating means may be used to retract the bolt or to actuate an emergency release lever carried by the lock. Still another object is to provide a door lock having a simple and efiective bolt mechanism equipped with a positive-acting dead bolt and composed of a fewer number of parts than the latch or bolt structures in present use.

Other objects will appear from the specification and drawings, in which:

Figure l is a longitudinal sectional view showing a door lock embodying the present invention; Figure 2 is a cross sectional View of the door lock taken along lines 22 of Figure 1; Figure 3 is a broken longitudinal sectional view showing the parts which hold the lock in a door; Figure 4 is a vertical sectional view taken along lines 4-4 of Figure 1; Figure 5 is a detailed perspective view showing the bolt retractor actuating levers; Figure 6 is a perspective View showing parts of the bolt retractor assembly; Figure 7 is a plan view partly in section of the emergency release lever, bolt retractor actuating levers and locking member; Figure 8 is a perspective view showing details of the emergency release lever; Figure 9 is an exploded perspective view showing some of the members which anchor the lock mechanism within a door; Figure 10 is an exploded perspective view showing a portion of the lock casing and related parts; and Figure 11 is a front elevation of the casing for the present lock structure.

Referring to the drawings, Figure 1 shows a lock embodying the present invention mounted in a door 10 having an outside surface 11, an inside surface 12 and a front edge 13. To accommodate the lock, door 10 is provided with a transverse, horizontal bore 14 extending from opposite sides of the door, and a horizontal bore 15 extending rearwardly from the front edge of the door and intersecting bore 14 at right angles.

Within bore 14 is a cylindrical casing 16. To facilitate manufacture of the casing, and to simplify assembly of the lock, I prefer to form casing 16 from a pair of identical and abutting cylindrical sections or portions 17 and 18. As shown best in Figures 3 and 10, each section of the cylindrical casing has an end wall 19 and a tubular portion or sleeve 20 of reduced diameter extending outwardly therefrom. A passage 21 leads from the open ends of the sleeves 20 into the interior of casing 16. The annular end walls 19 of the casing are provided with diametrically opposing slots 22, and an aperture 23 is provided at the junction of sleeve 20 and end wall 19 of each of the casing segments. The outer curved wall of each of the casing sections 17 and 18 has a slot or opening 24 adapted to receive one of the paired tabs 25 of the C-shaped connecting member 26. This connecting member thereby joins and secures the casing sections, and also serves as a guide and as a mounting for the bolt retracting assembly as will appear shortly.

A pair of discs or circular rose plates 27 are equipped with central openings 28 and are adapted to fit over the sleeves 21) of the cylindrical casing 16. These plates have a greater diameter than the casing 16 and transverse bore 14. As shown most clearly in Figures 4 and 10, each of the rose plates 27 is equipped with a pair of inwardly projecting tabs 29 having tapered ends equipped with vertically turned hook portions 30. Figures 3 and 4 show tabs 29 extending through slots 22 into the interior of the casing 16. In addition, rose plates 27 may be equipped with diametrically disposed peripheral tabs 31 which are turned inwardly to define notches 32. Tabs 31 are adapted to engage the curved walls of bore 14, and the peripheral notches 32 permit the insertion of hooks 33 on diametrically opposite edges of cover plate 34. Roses or cover plates 34 may, therefore, be hooked or curled over rose plates 27. Roses 34 are provided with central apertures 35 for receiving the outside and inside

spindles

36 and 37, respectively, as shown in Figures 1 and 4. The spindles project into the casing chamber from opposite sides of door 10, and extend through the central apertures or openings provided in casing 16, rose plates 27 and roses 34. In the view presented in Figure 10, the tubular spindles are shown to have a pair of inwardly projecting fingers or tabs 38 diametrically disposed at the innermost ends thereof. Adjacent the inner ends of the

spindles

36 and 37 are elongated circumferentially extending slots 39 and rectangular apertures 40.

Outside and inside knobs or handles 41 and 42 fit over

spindles

36 and 37, respectively, and may be provided with knob tabs 43 staked into rectangular apertures 40 to secure the knobs upon the spindles. However, Where the outside knob carries a lock cylinder 46, as represented in Figures 1 and 4, I prefer to secure that upon its respective spindle by other means than by staking, as will presently appear. The lock cylinder 46 extends about the curved periphery of a rotatable plug 45, and has an upwardly projecting vane 47 which is accommodated by a longitudinally extending slot in the spindle and which abuts the inner surface of outside knob 41. Vane 47 thereby anchors the lock cylinder to spindle 36, and at the same time prevents withdrawal of knob 41 with reference to the lock cylinder.

An unlocking member 48 generally comprising a flat, elongated plate, has its outer end fitted into a longitudinal slot 48:: provided by plug 45. A C-shaped washer 48b extends about a circumferential portion of the grooved periphery of plug 45 and passes through a suitable notch I) (not shown) adjacent the outer end of the unlocking member. It will be noted that the C-shaped washer 48b abuts the inner end portion of cylinder 46, and that the outer end of plug 45 provides an annular lip 480 in contiguous relation with plug 45, thereby preventing independent longitudinal movement of the plug, the lock cylinder, and the unlocking member. A tab 36a (Figure 4) provided by the outside spindle engages locking member 48 so that knob-41, spindle 36, cylinder 46, plug 45 or unlocking member 48 cannot be separately moved either inwardly or outwardly with respect to the casing 16. Plug 45 may be rotated within cylinder 46 by any suitable key means. Since the tumbler mechanism of the lock cylinder and plug are entirely conventional, illustration and description of such mechanism is believed unnecessary here.

Figures 1 and 4 show the outer end of the inside spindle 37 accommodating a push button 49 having a normally vertically extending rib 54 at its outermost end. A Washer 51 is carried by button 49 and has an upwardly projecting portion 52 which rides in the longitudinal slot 52a of the inside spindle 37 when the button is pressed inwardly. A transversely or circumferentially extending slot 53 intersects the longitudinal slot 48 and is adapted to receive an upwardly projecting portion 52 and to permit rotational movement of button 49 after that button has been moved inwardly.

Within cylindrical casing 16 is a generally C-shaped cam member 54 (Figures 3 and 9) having a curved forward wall 55 and a pair of legs 56 extending rearwardly away from the front edge 13 of the door. Each of the legs 56 has a pair of cam surfaces or edges 57 which extend rearwardly and outwardly and are defined by a generally V-shaped notch. The angled cam surfaces of member 54 are adapted to engage the hooks 30 at the inner ends of the tabs provided by rose plates 27, so that when the cam member is moved rearwardly within the cylindrical casing the rose plates and covers are clamped tightly against the outside and inside surfaces of door it As best seen in Figure 9, the forward wall 55 of the C- shaped cam member is provided with a threaded bore 58 and a pair of openings 59 adjacent thereto.

The legs of cam member 54 are adapted to slide rearwardlyover the forwardly extending legs 68 of C-shaped connecting member 26. As indicated in Figures 10, 9 and 2, the end portions 61 of legs 60' may project through the openings 59 of the cam member. Therefore, the slidable cam member may be moved rearwardly within casing 16 independently of connecting member 26.

Bore -8 of the cam member threadably receives a bolt 63 which projects rearwardly through an, aperture 63a in a spindle mounting member 64. The spindle mounting member 64 is loosely carried by bolt 63 and is equipped with laterally extending arms '65 having forwardly projecting end portions 66. The outwardly extending arms 65 carry spindle mounting member extensions 67 which project through openings 67a in the casings forward wall for engaging the curved wall of bore 14. The forwardly turned end portions 66 of arms 65 are adapted to be inserted into the circumferentially extending slots 3% of the outside and inside

spindles

36 and 37, respectively, as the mounting member is moved forwardly within the casing by rotation of bolt 63.

A lock spacing tube 68a extends forwardly within horizontal bore 15 of the door and is provided with notched tabs 69 which project through the irregular opening 68 (Figure 11) in the cylindrical casing and through openings 59 in the front wall of the cam member. Rotation of tube 68a with respect to case sections 17 and 18 causes the notched tabs 69 tocatch and to lock securely upon casing edges 69a adjacent opening 68.

A face plate 70 upon the front edge of door 16 is carried by tube 68a adjacent the front end thereof. An outwardly projecting flange or rim 71 about the front edge of tube 68a engages the face plate and secures it upon the tube. Adjacent the forward end of-the tube are a pairof diametrically disposed apertures 72 which receive the inwardly turned ends 73 of a C-shaped spring 74. As shown in Figure 3, each of the inwardly turned ends of spring 74 is provided with a 45 cam portion 75.

Within the tubular spacing tube 68a is a latch bolt case 76. The latch bolt case has tubular side walls 77 and a forward wall provided with two pair of diametrically disposed slots 78. The paired vertical slots slidably receive the rearwardly extending arms 79 of a latch bolt connector 88, which is most clearly presented in Figure 6. The most forward end of the latch bolt connector 80 carries the latch bolt 81 which has a curved cam surface 82 for directing the bolt rearwardly into tubular casing 76 when the bolt engages a striker plate (not shown) mounted upon a door frame. It is to be noted that the latch bolt is mounted upon connector 80 for limited reciprocal movement independent from the connector.

The paired horizontal slots 78 in the front wall of bolt casing 76 accommodate theforward end portions 82 of a dead bolt lever 83 which is shown in Figure 1 as an inverted L-shaped member. A cylindrical dead bolt release lever 84 is mounted for independent sliding movement upon the back of the L-shaped member. Figure 1 shows the top of the inverted member, or the most forward portion thereof, equipped with a pointed cam portion :85 which rides in a longitudinal slot 86 in the elongated dead bolt. A helical spring 8'7 extends between latch bolt 81 and the leg of dead bolt lever 83. This spring not only biases latch bolt 81 forwardly, but also tends to pivot or swing the dead bolt lever about a point 88 in order to seat cam 85 within a V-shaped notch or cam groove 89 adjacent the forward end of the latch bolt connector 80. However, a dead bolt spring 90 which extends from the front wall of bolt casing 76 to the rear end of dead bolt release lever 84 biases the dead bolt forwardly, and normally prevents the seating of cam 85' in notch 89.

As shown in Figure 6, a generally C-shaped latch bolt retractor 91 is equipped with claws 52 adapted to engage and secure the rearwardly extending legs 79 of the latch bolt connector. The latch bolt connector is provided with a pair of lateral projections or extensions 93 on each side thereof. These projections preferably curve rearwardly, as shown in Figure 6, to insure smooth and effective operation of the retracting mechanism.

Bolt retractor actuating levers 94 are illustrated in detail in Figure 5. Each of the paired levers is identical to theother, and is provided with a tab 95 at one end having an opening therethrough and a pin 96 at the opposite end. In addition, each lever has a jog or offset center portion and a pair of

parallel arms

97 and 98 extending in opposite directions. The levers are mated so that the pin 96 of each extends through the opening in the tab of the other. These pins are rotatably mounted within openings 99 in opposite legs of the G-shaped connecting member 26.

The latch bolt retractor 91 is slidably mounted between the forwardly extending legs 66 of the connecting member 26, and is positioned so that the paired projections 93 are disposed behind the pivotally mounted bolt retractor actuating levers 94. When the large slotted arms 98 of the levers are swung rearwardly, they engage the projections 93 of the latch bolt retractor, and therefore slide the retractor 91, connector 80 and latch bolt 81 inwardly or rearwardly.

Both of the pivotally mounted bolt retractor actuating levers may be simultaneously rotated, either by rotation of spindle 36, spindle 37, or lock release lever 48, or by reciprocal movement of asuitable lock releasing member which will be described shortly. As mentioned above, each of the spindles 36. and 37 is equipped with a pair of inwardly projecting tabs or fingers 38. These fingers extend between the arms. 97 and 9 8 of the paired actuating levers $4. When a spindleisturned or rotated, one of the fingers thereof forces one of the arms 97' forwardly, while the other finger directs the nearest split arm 94 rearwardly toward the back wall of the latch bolt retractor 91.

Arms

97 and 98 of both actuating levers are thereby forced apart, and the slotted arms 90 are urged against the projections 93 of the retractor.

The unlocking member 48, shown best in Figures 1 and 4, is provided with a pair of inwardly projecting fingers 101 which extend between a pair of

parallel arms

97 and 98 of the actuating members. Therefore, when plug 45 is turned, the actuating levers are pivoted in the same manner as they are rotated by fingers 38 of the spindles. The unlocking member is preferably provided with a slot '102 to accommodate locking member 103, which will now be described.

The locking member 103 (Figure 1) extends through the inside spindle 37 and into the cylindrical casing 16 and the outside spindle 36. One end of the member is staked to the disc 51 carried by push button 49, While the enlarged opposite end thereof is provided with a catch portion 104 which is insertable into both the aperture '23 in cylindrical casing section 17 and into the longitudinally extending slot 105 provided at the inner end of outside spindle 36. The reduced intermediate portion of the locking member is provided with a pair of 45 cam portions 106 and a pair of notches 107 between the cam portions and the end of the member connected to push button 49. As shown best in Figure 4, a helical spring 108 has one end thereof mounted upon unlocking member 48, and the opposite end thereof connected to locking member 103. This compression spring biases the locking member into the normal position shown in Figures 1 and 4. Another helical compression spring 109 extends between the rear curved wall of cylindrical casing 16 and the back face of latch bolt retractor 91, and urges the retractor, the latch bolt connector, and latch bolt into extended or latched positions.

Figures 1, 2. and 4 show a door lock with a conventional key-operated lock cylinder mounted within the outside doorknob, and a push button supplied within the inside knob. Since both the inside and outside knobs and spindles are identical in construction, it is to be understood that the relative positions of the lock cylinder and push button may be reversed. Furthermore, the lock cylinder 46 and unlocking member 48 might be removed completely from the lock and a suitable plug or push button (not shown) substituted therefor.

Figures 7 and 8 illustrate a second embodiment of my invention which is particularly useful where the lock structure is to be mounted upon inside doors, such as bathroom or bedroom doors. In this embodiment, the lock cylinder 46, plug 45 and unlocking member 43 (illustrated in Figures 1-4) are replaced by a single emergency release lever or member 110. This member is composed of a pair of parallel and elongated top and bottom plates 111 which have tapered inner ends 112, and which are joined at their opposite end and along one side thereof by end plate 113 and side plate 114. A pair of intermediate spacing plates 115 converge from the top and bottom plates 111 and define a space 116 therebetween for slidably receiving the enlarged end of the elongated locking member 103. The emergency release lever is thereby mounted at right angles to the locking member 103 and is disposed so that its pointed or tapered ends 112 project between a pair of arms provided by the bolt retractor actuating levers 94. Inward movement of the emergency release lever will thus wedge or separate

adjacent arms

97 and 98 of the actuating levers, and cause the retraction of latch bolt 81. Helical spring 117 abuts spacing plates 115 and unlocking member 40, and urges the emergency release member into the normal position shown in Figure 7. Knob 118 is provided with a slot or opening 119 so that a suitable key or unlocking device (not shown) may be inserted through the opening to force the emergency release member inwardly, and to thereby unlock the door.

Operation Since the operation of the parts responsible for holding the lock in the door has already been discussed in detail with reference to the structure of the specific parts, a brief summary of this operation is believed sufficient. To mount the lock in door 10, all of the parts except the bolt mechanism, the lock spacing tube 68a, the inside doorknob 42 and the inside spindle 37, inside rose plate 27 and inside rose 34 are inserted into the transverse horizontal bore 14 from the outside surface 11 of the door. The lock spacing tube 68a, C-shaped spring 74 and face plate are then inserted into the intersecting horizontal bore 15 from the front edge 13 of the door. Lock spacing tube 68a is then rotated so that the notched tabs 69 at the rear end thereof engage or catch the edges 69a adjacent opening 68 in the front Wall of the case 16. The inside rose plate, doorknob and spindle .are then inserted into the case in such a manner that tabs 29 of the inside rose plate project through slots 22 of the cylindrical case and so that transverse slot 39 of the inside spindle is moved into alignment with the forwardly projecting end portion 66 of the spindle mounting member 64. Bolt or screw 63 is then tightened.

As the bolt is tightened, the spindle mounting member 64 and the 'C-shaped cam member 54 are moved towards each other. The rearwardly and outwardly extending cam edges or surfaces 57 of member 54 engage tabs 29 of the rose discs or plates, and direct these plates and their connected covers or roses inwardly against the inside and outside surfaces of the door. It is believed apparent, therefore, that the door lock of the present invention may be easily mounted in a variety of doors having difierent thicknesses.

While the cam member moves rearwardly, the spindle mounting member 64 travels forwardly so that the forwardly turned end portions 66 pass into the transverse or circumferential openings 39 in each of the

spindles

36 and 37. These spindles and the doorknobs staked thereon are thereby rotatably secured to the lock casing 16.

As bolt 63 is tightened, the spindle mounting member extensions 67 carried by member 64 travel forwardly through openings 67a in the curved wall of the cylindrical casing, and abut door 10. Further tightening of the bolt drives the entire lock casing rearwardly against the rear wall of transverse bore 14, thereby staking the pointed tabs 25 of member 26 into the door and, at the same time, retracting the lock spacing tube 68a into the smaller horizontal bore 15. The lock is thereby firmly clamped within the door by movement in four directions produced by the rotation of a single bolt or screw 63.

To install the bolt mechanism, the bolt case 76 and all parts contained therein are inserted into the lock spacing tube 68a so that the ends of the legs of the latch bolt connector 80 enter case 16. The bolt case is then rotated to bring the slots 92a of the latch bolt connector into vertical alignment with fingers or claws 9'2 (Figure 6), and the C-shaped spring 74 with its inwardly turned ends locks the bolt case and bolt mechanism within the tube 6801. When either the inside or outside knob is rotated, the inwardly projecting tabs 38 upon the spindles carried by the particular knob force arms 97 and of the bolt retractor actuating levers 94 apart. Both of the slotted arms 98 pivot rearwardly to engage the latch bolt retractor 91, thereby retracting the latch bolt 81. To lock the door, push button '49 in the inside doorknob is depressed so that the locking member 103 is driven inwardly. The pair of adjacent arms of the actuating levers nearest the inside doorknob 42 catch in the intermediate notches 107 behind the 45 cam portions 106 of the locking member carried between the arms. At the same time, tab 104 of the enlarged portion of the locking member moves into aperture 23 of the cylindrical casing and into slot 105 of the outside spindle 36. An interlock is thereby formed between the outside spindle and the lock casing to prevent rotation of that spindle and outside knob.

The door may be unlocked by pivoting bolt retractor actuating levers 94 until arms 97 are free of notches 107 in the locking member H33. When the bolt retractor actuating levers are rotated in this manner, spring 108 urges the locking member 103 toward inside knob 42 and into the released position shown in Figure 1. The bolt retractor actuating levers may be rotated and moved to released position by inserting a suitable key into the lock cylinder 46 carried by the outside spindle 41, and turning the key to rotate unlocking member 48. A similar result may be accomplished by turning the inside knob 42 or pushing an emergency release lever (Figures 8 and 7).

If it is desired to maintain member 103 in a locking position, push button 49 may be depressed and then rotated to bring the upwardly projecting portion or tab 52 of Washer or disc 51 into the transverse slot 53 of the inside spindle. When the push button is rotated in this manner, spring 108 cannot retract the locking member 103 even after the door has been unlocked by rotation of the inside knob or by the turning of unlocking member 48.

The bolt retractor actuating levers 94 may be operated by reciprocal motion as well as by rotary motion, as shown in the second embodiment of my invention represented in Figures 7 and 8. As the tapered emergency release lever 110 is pushed inwardly, the actuating levers are wedged apart and bolt 81 is thereby retracted. While I have shown the emergency release lever adapted to be operated by a suitable key, it is believed evident that such a lever might also be actuated by pushbu-tton means.

As door 10 is closed, the strike plate (not shown) mounted upon the door casing engages the curved surface 82 of bolt 81 and forces the bolt inwardly along with dead bolt release lever 84. Preferably, the opening in the striker plate is large enough to accommodate only the bolt 81 so that when the door is closed, dead bolt release lever 84 remains in a retracted position. Spring 87 not only urges bolt 81 into the opening provided by the striker plate and door casing, but also pivots dead bolt lever 83 about pivot point 88. As a result, the pointed cam portion 85 of lever 83 is directed into the groove 89 provided by latch bolt connector 80. Force applied directly to bolt 81 will serve only to bring the bolt into abutting relation with the outer end of lever 83 and will not produce retraction of that bolt. A safety feature is thereby provided since bolt 81 can be retracted only by rotation of the paired bolt retractor actuating levers 94. As the bolt retractor actuating levers are pivoted, the V-shaped cam groove or notch 89 of the latch bolt connector 84) cams dead bolt lever 90 into the position shown in Figure 1, thereby permitting the retraction of the latch bolt.

While I have disclosed the embodiments of my door lock in considerable detail, it will be understood by those skilled in the art that these details may be varied considerably without departing from the spirit and scope of my invention.

I claim:

1. A door lock comprising a casing adapted to fit within a bore provided within a door and having at least one slot in each of a pair of opposite walls thereof, a pair of plates movable inwardly towards each other and each being provided with at least one inwardly projecting tab adapted to extend into said casing through one of said slots, a cam member being movably mounted within said casing for movement in a direction transverse to the direction of movement of said plates and being provided with cam surfaces engageable with the tabs of both of said plates for simultaneously drawing said plates inwardly against said door upon transverse movement of said cam member, andmeans for transversely moving said cam member within said casing.

2. The structure of claim 1 in which said cam member'is *C-shaped and is provided with a front wall and a pair of legs extending rearwardly therefrom, said legs each having a V-shaped notch at the rear portion thereof to provide rearwardly and outwardly angled cam surfaces adapted to engage'the tabs of said plates.

3. The structure of claim 1 in which said door lock is provided with a pair of roses, each being mounted upon one of said plates so that said roses are drawn inwardly as said cam member is moved transversely with reference to the inward movement of said plates.

4. A door lock comprising a casing adapted to be carried within a bore provided in a door and having a pair of central openings in opposite walls thereof, said casing also having a pair of slots adjacent each of said central openings, a pair of plates each having a central opening therethrough and being equipped with a pair of inwardly projecting tabs adapted to extend into said casing through said slots, a pair of spindles each extending into said casing through the central opening in one of said plates and in one of said casing walls, a movable cam member within said casing, said cam member being adapted to engage the tabs of said plates and urge said plates inwardly as said cam member is moved rearwardly, a spindle mounting member movably mounted within said casing and being adapted to engage the inner end portions of said spindles as said mounting member is moved forwardly, and means for simultaneously moving said spindle mounting member forwardly and said cam member rearwardly within said casing.

5. The structure of claim 4 in which said means comprises bolting means rotatably mounted on one of said members and threadably secured to the other of. said members, whereby upon rotation of said bolting means said cam member and said spindle mounting member are moved in opposite directions.

6. The structure of claim 4 in which said casing is provided with an opening in the forward wall thereof, said spindle mounting member being equipped with extension portions projecting forwardly toward said-forward opening, whereby, when said mounting member is moved forwardly, said portions are carried through said opening into abutting relation with said door to ancho said casing within said bore. 7

7. The structure of claim 4 in which said door is provided with a second bore extending rearwardly from the edge of said door and intersecting said first mentioned bore, a tube detachably mounted upon said casing and movably carried within said second bore, said tube being moved rearwardly within said second bore as said cam member is moved rearwardly within said casing.

8. A door lock comprising a casing adapted to fit within a bore provided within a door and having at least one slot in each of a pair of opposite walls thereof, a pair of plates movable inwardly towards each other and each being provided with at least one inwardly projecting tab adaptedto extend into said casing through one of said slots, a cam member being movably mounted within said casing for movement transverse to the direction of movement of said plates and being. provided with cam surfaces engageable with the tabs of said plates for simultaneously drawing both of said plates inwardly against said door when said cam member is moved transversely, means for moving said cam member within said casing to urge said cam surfaces into engagement with said tabs, a lock spacing tube being movably carried within a second bore of said door and being detachably mounted upon said casing, and means for moving said tube and casing rearwardly within the bores provided in said door.

9. The structure of claim 8 in which said first mentioned means comprises a screw threadably secured to said cam member and carrying a laterally elongated member adjacent the rear end thereof, said casing being provided with openings in the front wall thereof, said movable member being provided with extensions adapted to project forwardly through said openings whereby, upon rotation of said screw, said laterally elongated member and said cam member are simultaneously moved forwardly and rearwardly respectively, said extensions being driven through said openings into abutting relation with said door to urge said casing and tube rearwardly within said bores.

10. A door lock comprising a cylindrical casing adapted to fit within a cylindrical bore within a door and having a pair of openings in opposite end walls thereof, a pair of spindles each extending into said casing through one of said openings, each of said spindles being equipped with a circumferentially extending slot adjacent the inner end thereof, a spindle mounting member being movably secured within said casing and having forwardly projecting arms, said arms being engageable with the slots of said spindles when said member is moved forwardly and being adapted to release said spindles when said member is moved rearwardly, means for moving said member rearwardly and forwardly within said casing, said casing being provided with openings in the forward wall thereof, and extension members carried by said spindle mounting member and projecting forwardly through the openings in the forward wall of said casing, whereby, when said spindle mounting member is moved forwardly, said extension members are carried through said openings into abutting relation with said door within said cylindrical bore.

11. A door lock comprising a cylindrical casing adapted to fit within a cylindrical bore within a door and having a pair of openings in opposite end walls thereof, a pair of spindles each extending into said casing through one of said openings, each of said spindles being equipped with a circumferentially extending slot adjacent the inner ends thereof, a first member movably secured within said casing and having forwardly projecting arms, said arms being engageable with the slots of said spindles when said member is moved forwardly and being adapted to release said spindles when said member is moved rearwardly, a second member mounted within said casing and adapted to urge said casing rearwardly within said bore when said second member is shifted rearwardly, a threaded shaft threadedly connecting said first and second members for moving the same towards and away from each other when said shaft is rotated, said casing being provided with openings in the forward wall thereof, and extensions carried by said first member and extending forwardly through said openings in the forward wall of said casing for abutting the door within said bore when said shaft is rotated to move said first and second members towards each other, whereby, when said shaft is rotated to move said members towards each other after said extensions abut said door, said second member moves rearwardly to shift said casing rearwardly within said bore.

12. The structure of claim 11 in which a lock spacing tube is detachably mounted upon said casing and is drawn rearwardly into a second bore provided by said door when said second member is moved rearwardly.

13. A door lock comprising a cylindrical casing adapted to be mounted within a recess of a door and having openings through opposite ends thereof, a pair of rotatable spindles each projecting into said casing through one of said openings, a pair of spaced clamping plates carried by said casing and movable towards each other for engaging opposite sides of said door and for securing said casing within said recess, a spindle mounting member and a cam member movably mounted within said casing for movement towards and away from each other, means for selectively moving said spindle mounting and cam members towards and away from each other, said spindle mounting member having portions which engage and lock said spindles against axial movement relative to said casing upon movement of said cam member, said cam member having cam surfaces which engage portions of both of said clamping plates and urge the same towards each other and into engagement with opposite sides of said door upon movement towards said spindle mounting member.

References Cited in the file of this patent UNITED STATES PATENTS 1,876,885 Ellingson Sept. 13, 1932 2,076,125 Grimsrud Apr. 6, 1937 2,538,688 Heyer Jan. 16, 1951 2,650,122 Welch Aug. 25, 1953 2,711,920 Farnsworth June 28, 1955 2,726,891 Gresham et al. Dec. 13, 1955 2,730,391 Rayburn Jan. 10, 1956 2,742,310 Russell Apr. 17, 1956 2,795,948 Rayburn June 18, 1957