US3064462A

US3064462A - Door lock construction

Info

Publication number: US3064462A
Application number: US27724A
Authority: US
Inventors: Clifford G Ng; Carl E Beck
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-05-09
Filing date: 1960-05-09
Publication date: 1962-11-20
Anticipated expiration: 1979-11-20

Description

Nov. 20, 1962 c. 6. MG ETAL 3,064,462

DOOR LOCK CONSTRUCTION Filed May 9. 1960 3 Sheets-Sheet 1 TO OPEN DOOR INVENTORS Clifford a. Ng

y Carl E. Bck

fforneys C. G. NG ETAL DOOR LOCK CONSTRUCTION Nov. 20, 1962 Filed May 9. 1960 INVENTORS Clifford 6. N9 y Carl EBec A forneys Nov. 20, 1962 c. a. N6 ETAL 3,06

DOOR LOCK CONSTRUCTION Filed May 9. 1960 3 Sheets-Sheet 3 F I g 'INVENTORS Clifford G. Ng BY Carl Beck m imorneys assent Patented Nov. 20, 1962 hoe 3,964,462 DOOR LUCK CGNSTRUCTHBN Clilford G. Ng, 575 /2 Vallejo St., and Carl E Beck, 317 th St, both of San Francisco, Caiif. Filed May 9, 1960, Ser. No. 27,724 14 Claims. (til. 7tl-153) This invention relates generally to a lock construction for a swingably mounted door. More particularly the invention relates to a door lock construction for maintaining a swingable door closed, such construction including handle means for easily and rapidly effecting locking of the door in the closed position or rapid opening of the door. The subject construction is characterized by its freedom from use of conventional rotatable door knobs commonly employed in the art heretofore. The subject construction instead employs handle means which are effective for opening a closed door merely by pushing or pulling thereon, depending upon which side of the door the operator is standing and in which direction the door is swingable.

The lock construction of this invention also includes mean actuatable by the door handles for efiecting positive locking of the door from either the inside or outside thereof Without requiring use of a key. With the subject construction, a key is only employed when it is desired to open or unlock the door from the oulside. Additionally, however, the subject lock construction includes means actuatable by the inside handle of the door for rendering the key ineffective to open the door whereby the door may be securely locked from the inside and can only be opened from the inside. In addition, the subject con struction also includes an inside lock means which may be rendered openable by the key mentioned previously. As disclosed herein, the various locking arrangements of this invention may all be combined with each other in a single lock construction or, alternatively, one or more locking arrangements may be omitted from a given lock construction, depending upon its intended use.

Because the subject door lock construction does not employ conventional rotatable door knobs, opening of a swingable door on which the present construction is employed is simplified in that the natural motion of the hand of the person opening the door results in substantially automatic door opening. That is, for example, on a door hingedly mounted to swing inwardly into a building or a room thereof, the door handle on the outside of the door is effective when depressed to disengage the locking bolt of the lock construction from the door frame so that automatic door opening is effected merely by pushing downwardly on the outside door handle. The force of such downward pushing is accompanied by an attendant force directed inwardly toward the door which automatically results in inward swinging of the door when the outside handle is depressed. Conversely, a person on the inside of the door need merely pull up or raise the inside door handle and such upward force is automatically accompanied by a force which is directed away from the door which automatically results in the door being swung inwardly all in one smooth operation. This is in distincton to conventional lock constructions which emp'oy rotatable door knobs which require a first motion to turn the door knob to disengage the locking bolt and a subsequent pushing or pulling operation to effect door opening.

Objects of the present invention include the provision of a lock construction which is free of conventional rotatable door knobs; the provision of a lock construction in which the locking bolt thereof is retractable upon depressing or raising a given door handle; the provision of door handle actuatable means for selectively booking and locking the bolt of the lock construction in its prowell known manner.

2 jected position to positively preclude unauthorized door opening; and the provision of lock construction which includes key actuatable means for unlocking a door handle actuatable locking means.

These and other objects of the invention will become apparent from a study of the following specification in which reference is directed to the accompanying drawlugs.

FIG. 1 is an end elevational view of the subject lock construction positioned in a swingable door.

FIG. 2 is a side elevation of the outside door handle of the lock construction.

FIG. 3 is a side elevation of the inside door handle.

FIG. 4 is a vertical section through the door and lock construction taken in the plane of line 44 of FIG. 2.

FIG. 5 is a bottom plan view of the lock construction casing taken in the plane of line 55 of FIG. 4 and showing the handle arrangement extending therefrom.

MG. 6 is a vertical section through the lock casing illustrating details of the internal mechanism thereof.

FIG. 7 is a horizontal section through the lock casing taken in the plane of line 7-7 of FIG. 6.

FIG. 8 is a vertical section through the lock casing taken in the plane of line 83 of FIG. 7.

FIG. 9 is a generally horizontal section through the lock casing taken in the plane of line 99 of FIG. 8.

FIGS. 10 through 12 are partial vertical sections through the lock casing which correspond generally to FIG. 7 and which illustrate various operative positions of the components of the lock construction mechanism.

FIG. 1 illustrates the subject lock construction positioned in a door 1 which is swingably mounted for movement to the left of such figure in a door frame (not shown). The lock construction in this figure is illustrated substantially full size as are the componentsthereof illustrated in the remainder of the drawing figures. Such lock construction comprises an outside door handle 2, an inside door handle 3 and inner and outer decorative brass or like

escutcheon plates

4 and 6, respectively. The lock construction extends through the door 1 and includes a slidable locking bolt 7 which extends transversely of the door generally parallel to its inner and outer surfaces and which normally projects from an edge thereof to be lockingly engaged in a recess of the door frame in the Bolt 7 extends through a decorative plate 8 secured by screw fasteners 9 to the edge of the door. A key actuatable lock device 11 which is operated by a key 12 may be employed as part of the overall lock construction for a purpose to be described.

As shown in the sectional view of FIG. 4, the escutcl1-

eon plates

4 and 6 are preformed to conform to the shape of outer and

inner mounting blocks

12 and 13 respectively between which a hollow sheet metal casing 14 extends and in counterbores of which such casing is received. Casing 14 is generally circular in cross section, is generally closed at its opposite ends, and is snugly received in a generally circular bore 16 provided through the door 1.

Screw type or equivalent fasteners (not shown) are employed for maintaining the

mounting blocks

12 and 13 operatively engaged with the door in a well known manner so that the casing 14 is securely maintained therebetween. As shown in FIGS. 2 to 4, the inner and

outer door handles

2 and 3 are preshaped from decorative sheet material, such as brass or stainless steel, and are preformed to a configuration having inturned ends 17 and- 18 which may be engaged by the fingers of a hand during door opening or locking. While two desirable configurations for the door handles have been illustrated, it should be obvious that many and varied decorative door handle constructions and configurations may be employed, depending upon the decorative effect desired.

The same is true of the

decorative escutcheon plates

4 and 6.

It should be noted that the door handles are of the non-rotatable type which are distinct from conventional rotatable door knobs heretofore employed with door locks.

As shown in FIGS. 1 and 4, a finger operated locking element 19 is provided on the inside of the door which projects from the lock casing and beyond the face of the inner escutcheon plate 6 so as to be readily engageable for a purpose to be described.

The

door handles

2 and 3 are slidably mounted on

outer projecting ends

21 and 22 respectively of door handle bars 23 and 24 (FIGS. 4 and 5) which project from the lock casing 14 beyond opposite sides of the door. Desirably set screws S or other suitable fasteners are positioned in plates P welded or otherwise secured to the door handles. Screws S are engaged with the handle bars and removably maintain the handles on the respective handle bars. The

respective handle bars

23 and 24 are both pivotally mounted within the lock casing by means of a common pivot pin 26 which extends transversely of the casing and is engaged with opposite wall portions thereof as best shown in FIG. 5. It will be noted that the inside door handle bar 24 is pivoted on pin 26 substantially intermediate its length (FIGS. 4-6) so that the inner end 27 of the bar is movable upwardly interiorly of the lock casing. In distinction, however, the outer handle bar 23 is pivoted on pin 26 closely adjacent to its inner end 28.

As illustrated by FIGS. 5, 7, and -12, casing 14 at its bottom is provided with a longitudinal slot 29, the walls of which are defined by

upstanding casing sections

31 and 32 between which the

handle bars

23 and 24 are pivotally movable.

Projecting laterally from casing 14 is an auxiliary casing 33 (FIGS. 7 and 10) in which locking bolt 7 is slidably retained for projection or retraction. At its outer end auxiliary casing 33 is provided with oppositely directed flange sections 34 which are to be engaged with the edge of the door beneath aforementioned decorative plate 8 (FIG. 2). Flanges 34 are provided with cut outs 36 at their ends to accommodate the aforementioned screw fasteners 9. Such auxiliary casing 33 is positioned in a laterally extending bore 37 in door 1 which communicates with aforementioned bore 16. 7

At its inner end, auxiliary casing 33 is closed off by a cap member 38 welded or otherwise secured therein which forms a seat for a coil spring 39 which normally urges locking bolt 7 to its projected locking position shown in FIG. 7. Desirably a rigid link 41 is pinned at one of its ends to the bolt 7. At its inner end 42 link 41 is provided with a slot engageable with an upper end 43 of a flat upright pivotal bolt retractor 44. Such retractor is swingable adjacent its opposite end 46 on a pivot pin 47 which extends longitudinally of the lock casing 14. See FIG. 9.

Retractor 44 has the general configuration of a J and includes an intermediate projecting portion 48 extending laterally therefrom. It should be noted that if retractor 44 is pivoted by depressing its lower end 46, its upper end 43 will move to the left as viewed in FIG. 7 and effect compression of spring 39 and retraction of bolt 7 (see FIG. 10) due to the operative interengagement of the retractor and the bolt by the link 41 interposed therebetween.

- FIGS. 7 and 8 illustrate the engagement of the res'pective inner and outer handle bars 23 and 24 with the lower end of the J shaped retractor. It will be noted that desirably a U-shaped wear plate 49 is positioned over the lower end 46 of the retractor to provide a bearing surface for resisting wear due to relative movement between the handle bars and the retractor.

A In the embodiment illustrated inside handle bar 24 is channel or U-shaped throughout its length while outside handle bar 23 is channel or U-shaped at its outer end 21 only with the sides thereof at its inner end 28 being bent into side by side contacting relationship so as to lie between and interfit with the opposite sides of the channel shaped handle bar 24 as illustrated in FIGS. 5, 7 and 10 through 12.

Retraction of the bolt 7 from the projected position of FIG. 7 to the retracted door opening position of FIG. 10 may be effected by means of the inside door handle 3 by raising handle 3 upwardly so that the outer end of handle bar 24 is moved to the upper dotted line position of FIG. 8. Such raising of handle 3 results in the inner end 27 of handle bar 24 being depressed which results in the retractor 44 being pivoted about its pivot pin (FIG. 10) to draw its upper end 43 inwardly of the casing and to draw therewith bolt 7.

Alternatively, retraction of bolt 7 may be effected by the outside door handle 2 by pressing the same downwardly to move the outer end 21 of handle bar 23 to the depressed position shown in dotted lines in FIG. 8. This effects pivotal movement of the retractor 44 and attendant retraction of the bolt.

Because the retractor is spring urged to the normally projected position shown in FIG. 7, when the handle employed to retract the bolt is released, the bolt is again automatically projected and the retractor is returned to its neutral position.

To facilitate in maintaining the outside handle 2 in its neutral position with its handle bar 23 generally horizontal, desirably a leaf or like spring 51 (FIGS. 4 and 8) may be operatively interposed between handle bar 23 and the casing 14 or bore 16 to normally urge such handle bar upwardly. Obviously, other spring. arrangements also may be employed if desired. The action of coil spring 39 upon retractor 44 also aids in normally maintaining handle 2 in a neutral position.

Means for retaining inside handle 3 and its handle bar 24 in a horizontal neutral position is shown in FIGS. 6 and 8. Such means comprises a generally U-shaped spring element 55 the bight portion 56 of which traverses the top of slot 29 in the casing and engages the

opposite walls

31 and 32 which define the slot. Such casing walls are provided with opposite substantially rectangular apertures 57 (FIG. 8) and spring member 55 is provided adjacent each of its opposite ends with inwardly bent detent portions 58 which normally project into and through the wall apertures. As shown in FIG. 8, the inner end 27 of handle bar 24 is cut away to provide opposite shoulders 59 normally engaged with the detents 58. In this manner, depression of the outer end of handle bar 24 is resisted by the detents of the spring element. However, if it is desired to depress the outer end of such arm to effect blocking of the retractor 44 as will be described hereinafter, the effects of the spring element detents can be overcome. That is, if force is applied to the outer end of handle bar 24, detents 58 may be sprung outwardly so that such detents become engaged with opposite sides of the arm and retain the inner end of the same in the raised position. In this regard, spring element 55 performs the dual function of normally retaining the arm in a neutral position and selectively retaining the same with its inner end in a raised position.

In this connection, reference is again directed to FIG. 8 which illustrates in the lower dotted lines the outer end of handle bar 24 pivoted to the depressed position so that its inner end 27 is raised. It will be noted that when inner end 27 is thus raised, as shown in FIG. 12, the same is brought into direct engagement with the intermediate projection 48 provided on the bolt retractor 44. As a result, when the inside handle 3 is depressed, positive locking of the door may be effected in that all pivotal movement of the retractor 44 is precluded by engagement of handle bar 24 therewith and bolt 7 is securely retained in its projected position. Thereafter, bolt retraction can be effected only it inside handle 3 is returned to its neutral position by raising the outer end of handle bar 24 to disengage the handle bar from the retractor.

Additional means are provided for blocking and precluding pivotal movement of retractor 44 which cornprises a generally U-shaped blocking member 61 which is pivotally mounted adjacent the retractor on a pin 62 extending transversely of the casingas shown in FIG. 9. It will be noted that the outer end 63 of blocking member 61 is positioned to overlie the upper surface of outside handle bar 23 (FIG. 8) so that upward movement or raising of such handle bar will effect pivotal movement of such blocking member. When the inner end 64 of the blocking member 61 is in the raised position shown in FIG. 8, .the same is free of engagement with the intermediate projecting portion 4-8 of the bolt retractor so that the retractor may pivot to the bolt retracting position shown in "EEG. 10. However, pivotal movement of the blocking member to bring its inner end to the substantially horizontal position shown in FIG. 11 causes such element to engage directly the intermediate portion 48 of the retractor and to positively preclude pivotal movement of the retractor so that bolt retraction is positively precluded.

Pivotal movement of the blocking member 61 may be effected by raising upwardly on the outer handle 2. As a result, no keys or key actuatable means are required to lock the door from the outside in that after the door has been closed it is merely necessary to raise up on the outside handle 2 to efiect locking. However, key actuatable means desirably are provided to effect unlocking of a locked door from the outside. Such means may comprise .the tumbler or like lock device 11 mentioned previously which includes a rotatable cam element as operatively pinned or bolted to its inner end as shown in FIGS. 7 and 8-11. Rotation of cam element 66 is efiected by turning the key in the lock device 11.

Referring to FIG. 9, it will be noted that blocking member 61 at its outer end is provided with a pair of upwardly directed, spaced cam shoulders 67 and 68. Such cam shoulders are engageable by rotatable cam element 66 when the same is turned so that pivotal movement of the blocking member 61 from the retractor blocking position of FIG. 11 to the free position of FIG. 7 may be effected. Cam 66 is generally circular but has a raised eccentric portion 69 on its periphery which, during rotation thereof, is engageable with the cam shoulders of the blocking member when the inner end 64 thereof is depressed to effect depression of its outer end and attendant raising of the inner end.

It should be noted in this regard, however, that key 12 and lock device 11 have no effect on the inner end of the handle bar 24 when the same is in its raised locking position shown in FIG. '12 and in dotted lines in FIG. 8. As a result, a door may be locked from the inside so that the only way the same may be opened is by raising the inside handle 3 as described previously. This is a decided advantage in that even if it were possible for an intruder to pick the lock device '11, such action would have no effect on opening the door if the same were locked by depressing inside handle 3. Furthermore, because the inner end of the handle bar 24 positively precludes movement of the bolt retractor, any attempt to forcibly move the bolt to its retracted position is positively counteracted by the rigidity of the link 41 extending between the bolt and the retractor.

FIG. 8 also illustrates in dotted lines that the inner end of inside handle bar 24 may be selectively engageable with blocking member 61 to pivot the same out vof engagement with bolt retractor 44. As a result, if the door is locked from the outside by raising up on outside handle 2 or is locked from the inside by pressing in locking element 19 as described, a person inside the door still may open the same merely by depressing inside handle 3 to pivot blocking member 61 and by then raising up on handle 3 to retract the locking bolt.

The subject lock construction also includes means for locking the door from the inside which may be efiectively counteracted from the outside by turning of key 12 in the lock device 11. Such means comprises the aforementioned pivotal locking element 19 which projects from the inside of the lock construction above inside handle 3. As shown in FIGS. 8 and 9, locking element 19 has an inner end 71 which normally is engaged with the inner end 64 of the blocking member 61. Element 19 is pivotable intermediate its inner and outer ends about a pin 72 to that movement of the finger plate 73 on its outer end in an inward direction results in downward pivoting of the inner end of the locking element 19 and attendant downward pivoting of the inner end of the blocking element 61 to the locking position shown in FIG. ll. When in this position, however, it should be noted that rotation of cam element 66 by a key in lock device "11 will be effective to raise the inner end of the blocking element to free the retractor 4-4 in the manner described previously.

In view or" the foregoing it should be understood that the subject lock construction maybe employed to positively lock a door in one of three ways: (1) outside handle 2 may be raised to effect pivotal movement of blocking member at to the bolt retractor blocking position of FIG. 11; (2) the locking element 1 also may be employed to pivot blocking member 61 to the retractor blocking position of FIG. 11; and (3) the inside handle 3 may be depressed so that the inner end of handle bar 24 is raised and brought into contact with the bolt retractor as shown in FIG. 12. As noted previously, in the latter case, turning of key 12 in lock device 11 is ineffective to free the retractor from the restraining effects of the handle bar so that door opening can only be effected from the inside.

If desired, the various locking features may be employed in various combinations and one or more of the locking features may be omitted from a given lock construction. For example, if the subject lock construction is to be used on an internal door of a building, such as a bathroom, door, the key actuatable lock device '11 may be deemed unnecessary. However, generally when the subject construction is used with an vexterior building door, all three locking features described desirably are included.

Attention is now directed to FIGS. 6 through 9 which illustrate means for automatically returning and maintaining outside handle 2 to its neutral position after the same has been raised to effect pivoted movement of blocking element 61 as heretofore described. Such means comprises a generally U-shaped spring wire '76 which has a bight portion 77 extending across the

walls

31 and 32 defining the slot 29 of the lock casing. The extremities of the spring element extend downwardly and have inturned ends on which are mounted small tapered camming elements 78. Such camming elements extend through apertures provided in the side walls of the casing slot and engage the top of the outside handle bar 23. As a result, when the handle bar is raised to effect blocking of the bolt retractor as described previously, camming elements 78 are urged outwardly against the inward urging effects of the spring 76. When upward pressure on the handle bar 23 is released, the inward urging effects of the spring 76 on the conical elements 78 force the handle bar '23 and the handle 2 atached thereto to the aforementioned neutral position.

As seen in FIGS. 4 and 7, auxiliary bolt casing 33 extends through a hole 81 provided in casing 14. Desirably, a positioning plate 82 is fastened by rivet 83 to the upper inner periphery of casing '14. Such plate 82 desirably has oppositely directed diverging ears v84 (see FIG. 4) spaced from the periphery of easing hole 81 so that the inner end of auxiliary casing 33 may be located between such ears and the periphery of hole '81 in the casing for maintaining the two casings snugly engaged.

Referring to FIG. 7, disengagement of retractor 44 and and link 41 may be easily effected by rotating lock casing 14 in a clockwise direction as viewed in such figure. Such 7 rotation will effect downward movement of the upper end 43 of the retractor until the same is freed from engagment with the slot in link 41. Re-engagement of the link and retractor is easily efiected in a procedure reverse to that described.

Auxiliary casing 33 is slidable in lateral bore 37 provided in the door, and casing 14 with the mechanism preassembled therein is slidable through transverse bore 16 in the door so that positioning of the lock construction in a. door and operative interengagement of the link and retractor may be easily efiected in a short period of time. After the link and retractor are engaged, the mounting blocks, escutcheon plates and decorative handles may be positioned to complete the lock construction.

As will be noted from referring to FIG. 2, a small space 85 may exist in the end wall of casing 14 above or below outside handle 2 and its handle bar 23 when the handle is depressed or raised. While the existence of such space is not generally detrimental in that access to the inner mechanisms of the lock construction is generally precluded by the outer mounting block 12 when the construction is assembled, to eliminate any possibility of tampering with the mechanism by an intruder, it may be desirable to incorporate a small plate (not shown) either internally or externally of the casing which will move with handle bar 23 to block any such space at all times.

While a desirable embodiment of the subject lock construction has been disclosed herein, modifications thereof which may become evident to one skilled in the art are intended to be included within the scope of this invention and the same should be interpreted in light of the appended claims.

We claim:

1. For use in combination with a swingable door to be mounted in a door frame, a lock construction free of rotatable door knobs comprising a casing to be mounted in said door, a spring loaded bolt mechanism projecting from said casing including a slidable bolt to be engage normally with said door frame to preclude swinging movement of said door and maintain the same closed, a pivotal bolt retractor operatively engaged adjacent one of its ends with said bolt mechanism, a pair of pivotal door handle bars projecting from said casing in opposite directions on the outer ends of which non-rotatable door handles are to be mounted, each of said bars being engaged with said bolt retractor adjacent another end thereof, one of said handle bars being efiective when its outer end is depressed to cause pivotal movement of said retractor and attendant retraction of said bolt, the other of said handle bars being effective when its outer end is raised to cause pivotal movement of said retractor and attendant retraction of said bolt, a blocking member pivotally mounted in said casing adjacent said retractor, a locking element having a portion thereof located externally of said casing and another portion engaged with one end of said'blocking member for moving said member to a locking position in which said member engages an intermediate portion of said retractor whereby pivotal movement of said retractor is precluded, said one handle bar when its outer end is raised being engageable with another end of said blocking member for moving the same to said locking position, said other handle bar having an inner end portion thereof engageable with said retracor intermediate portion when the outer end of such bar is depressed whereby retraction of said bolt may be precluded, and key actuatable means engageable with said blocking member for moving the same from said locking position, said key actuatable means being ineffective for moving said other handle bar inner end portion from engagement with said retractor intermediate portion.

2. The lock construction of claim 1 including means for normally maintaining said handle bars in neutral positions between their respective raised and depressed positions. i

3. The lock construction of claim 1 in which said key actuatable means comprises a rotatable camming element mounted adjacent an end of said blocking member and engageable therewith when said member is in said locking position, rotation of said camming element being effective to cause pivotal movement of said blocking member from said locking position.

4. For use in combination with a door frame and a swingable door hingedly mounted on said frame; a lock construction for maintaining said door closed comprising a casing to be positioned in said door, a spring urged bolt normally projectable laterally from said door and engageable with said frame for precluding door opening when said lock construction is positioned in said door, a pivotal bolt retractor having an end thereof operatively connected with said bolt, and means for actuating said retractor; said actuating means comprising a pair of pivotal door handle bars having ends which project from said casing in opposite directions, each of said bars being operatively engaged with another end of said bolt retractor, one of said bars being effective when its projecting end is raised to cause pivoting of said retractor and attendant retraction of said bolt, the other of said bars being effective when its projecting end is depressed to cause pivoting of said retractor and attendant retraction of said bolt, and a blocking member movably mounted in said casing adjacent said bolt retractor, said blocking member being operatively engageable with a predetermined portion of said other door handle bar when said projecting end of said other bar is raised and being movable thereby from a first position in which said blocking member is free of engagement with said retractor to a second position in which said blocking member is directly operatively engaged with said retractor and positively blocks the same to preclude pivotal movement thereof.

5. For use in combination with a door frame and a swingable door hingedly mounted on said frame; a lock construction for maintaining said door closed comprising a casing to be positioned in said door, a spring urged bolt normally projectable laterally from said door and engageable with said frame for precluding door opening when said lock construction is positioned in said door, a pivotal bolt retractor having an end thereof operatively connected with said bolt, and means for actuating said retractor; said actuating means comprising a pair of pivotal door handle bars having ends which project from said casing in opposite directions, each of said bars being operatively engaged with another end of said bolt retractor, one of said bars being eifective when its projecting end is raised to cause pivoting of said retractor and attendant retraction of said bolt, the other of said bars being effective when its projecting end is depressed to cause pivoting of said retractor and attendant retraction of said bolt, said one handle bar having an opposite end thereof which is operatively engageable with said bolt retractor when said projecting end of said one bar is depressed to block and positively preclude pivotal movement of said rectractor, whereby retraction of said bolt may be positively precluded merely by depressing said one handle projecting end.

6. For use in combination with a door frame and swingable door hingedly mounted on said frame; a lock construction for maintaining said door closed comprising a casing to be positioned in said door, a spring urged bolt normally projectable laterally from said door and engageable with said frame for precluding door opening when said lock construction is positioned in said door, a

pivotal bolt retractor having an end thereof operatively connected with said bolt, and means for actuating said retractor; said actuating means comprising a pair of pivotal door handle bars which extend from said casing in opposite directions with an end of each bar projecting beyond opposite sides of said door when said lock construction is positioned in said door, each of said bars being operatively engaged with another end of said bolt retractor, one of said bars being effective when its projecting end is raised to cause pivoting of said retractor and attendant retraction of said bolt, the other of said bars being effective when its projecting end is depressed to cause pivoting of said retractor and attendant retraction of said bolt, a blocking member movably mounted in said casing adjacent said bolt retractor, and a locking element operatively engaged at one of its ends with said blocking member, the other end of said locking element projecting from said casing in the same direction of one of said handle bars so as to be accessible from a side of said door when said lock construction is positioned in said door, said locking element being effective when moved relative to said casing to efifect movement of said blocking member from a first position in which said blocking mem ber is free of engagement with said retractor to a second position in which said blocking member is directly operatively engaged with said retractor and positively precludes pivotal movement thereof, whereby retraction of said bolt may be positively precluded upon moving said locking element.

7. For use in combination with a door frame and a swingable door hingedly mounted on said frame; a lock construction for maintaining said door closed comprising a casing to be positioned in said door, a spring urged bolt normally projectable laterally from said door and normally engageable with said frame for precluding door opening when said lock construction is positioned in.

said door, a pivotal bolt retractor having an end thereof operatively connected with said bolt, and means for actuating said retractor; said actuating means comprising a pair of pivotal door handle bars which project from said casing in opposite directions, each of said bars being engaged with another end of said bolt retractor, one of said bars being effective when its projecting end is raised to cause pivoting of said retractor and attendant retraction of said bolt, the other of said bars being efiective when its projecting end is depressed to cause pivoting of said retractor and attendant retraction of said bolt, a blocking member movably mounted in said casing adjacent said bolt retractor, said blocking member being operatively engageable with a predetermined portion of said other door handle bar and movable thereby from a first position in which said blocking member is free of engagement with said retractor to a second position in which said blocking member is directly operatively engageable with said retractor for positively precluding pivotal movement thereof and thereby positively precluding retraction of said bolt, and key actuatable means operatively engageable with said blocking member for moving said blocking member from said second position to said first position, whereby said bolt member may be freed for retraction by said handle bars.

8. A door lock construction for use in combination with a swingable door, comprising a slidable bolt, mechanism for retracting said bolt from a projected position to a retracted position, and non-rotatable handle means for actuating said bolt retracting mechanism comprising first and second door handle operatively connected with said mechanism and locatable externally of said door on opposite sides thereof, each of said handles normally being retained in a predetermined neutral position in which said bolt is in its projected position, retraction of said bolt being effected by depressing said first handle from its neutral position or by raising said second handle from its neutral position, said lock construction being positionable in a door which is swingable inwardly into a room so that said first handle which is depressed to efiect bolt retraction is located on the outside of said door whereby simultaneous depressing and pushin of said first handle will automatically result in inward swinging movement of said door, and so that said second handle which is raised to efiect bolt retraction is located on the inside of said door whereby simultaneous raising and pulling of said second handle will automatically result in inward swinging movement of said door, and means actuatable by said first door handle upon raising thereof for positively engaging and physically blocking said bolt retracting mechanism whereby the need for keys or the like to effect locking of said lock construction from the outside of said door is precluded, said second door handle having a portion thereof directly engageable with said bolt retracting mechanism when said second door handle is depressed for positively blocking said mechanism whereby said lock construction may be locked from the inside of said door merely by depressing said second handle.

9. For use in combination with a swingable door to be mounted in a door frame, a lock construction comprising bolt mechanism projecting from said casing including a movable bolt, a bolt retractor operatively engaged adjacent one of its ends with said bolt mechanism, door handle bar structure projecting from said casing in opposite directinos, said bar structure being operatively engaged with said bolt retractor adjacent another end thereof, said bar structure being effective when moved in a given direction to cause movement of said retractor and attendant retraction of said bolt, a blocking member movably mounted in said casing adjacent said retractor, said blocking member being movable between a first position in which said member is free of engagement with said retractor and a second position in which said member directly engages said retractor and positively preciudes movement thereof so that retraction of said bolt is positively precluded when said member is in said second position, said bar structure being directly and selectively engageable with said blocking member for moving said member to said second position, and other means independent of said bar structure for moving said block ing member to said second position, whereby said bolt retractor may be positively blocked to positively preclude retraction of said bolt.

10. The lock construction of claim 9 which includes key actuatable means operatively engageable with said blocking member for moving the same from said second position to said first position, whereby said bolt retractor and said bolt may be freed from blocking.

11. The lock construction of claim 9 in which said handle bar structure include a portion which is selectively and directly engageable with said bolt retractor for positively blocking the same independently of said blocking member.

12. A lock construction comprising a casing, bolt mechanism projecting from said casing including a slidable bolt, a pivotal bolt retractor operatively engaged adjacent one of its ends with said bolt mechanism, a pair of pivotal door handle bars projecting from said casing in opposite directions on the outer ends of which non-rotatable door handles are to be positioned, each of said bars being operatively engaged with said bolt retractor adjacent another end thereof, one of said handle bars being efiective when its outer end is depressed to cause pivotal movement of said retractor and attendant retraction of said bolt, the other of said handle bars being effective when its outer end is raised to effect pivotal movement of said retractor and attendant retraction of said bolt, a blocking member movably mounted in said casing adjacent said retractor, said blocking member being movable between a first position in which said member is free of engagement with said retractor and a second position in which said member directly engages said retractor and positively precludes movement thereof so that retraction of said bolt is positively precluded when said member is in said second position, one of said handle bars being directly and selectively engageable with said blocking member when said one bar is raised for moving said member to said second position, the other of said handle bars including a portion thereof which is directly and selectively engageable with said bolt retractor when said other bar is depressed for positively and directly blocking 1 1 said retractor and thereby precluding retraction of said bolt.

13. The lock construction of claim 12 which includes means independent of said one handle bar which is operatively and selectively engageable with said blocking member for moving said member to said second position.

14. For use in combination with a door frame and a swingable door hingedly mounted on said frame, a lock construction for maintaining said door closed and locked: said lock construction comprising a casing to be positioned in said door; only one single locking bolt projectible from and movable relative to said casing, said locking bolt being normally engageable with said frame when said lock construction is positioned in said door and said door is closed for maintaining said door closed and locked when desired; a pair of door handle bars movably mounted in said casing and projecting therefrom in opposite directions, each of said handle bars being operatively connected with said locking bolt, each of said handle bars being eifective when its projecting end is moved in a given direction to eifect retraction of said bolt relative to said casing; and means in said casing for positively blocking said locking bolt and positively precluding retraction thereof relative to said casing whereby unauthorized re- 7 12 traction of said bolt and opening of said door is positively precluded when said bolt is blocked by said blocking means; said means comprising a movable bolt retractor in said casing operatively interposed between said handle bars and said bolt, said retractor being rigidly connected with said bolt so that said bolt cannot be retracted when said retractor is held stationary, and blocking structure in said casing selectively movable between first and second positions in which said structure respectively is engaged with and free of engagement with said retractor; said locking bolt when said blocking structure is in said second position being positively precluded from retractive movement relative to said casing whereby unauthorized retraction of said bolt to permit opening of said door thereby is positively precluded.

References Cited in the file of this patent UNITED STATES IPA'lENlSv 527,944 Coppage Oct. 23, 1894 880,985 Grann Mar. 3, 1908 1,965,789 Anglyn July 10, 1934 2,895,322 Pollock July 21, 1959 aqc nw, I