US3047323A - Door lock - Google Patents

Description

July 31, 1962 N. A. WELCH 3,047,323

DOOR LOCK Filed March 4, 1957 3 Sheets-Sheet 1 Hill M INVENTOR.

Mc/mms 19. We'll cw HTTOENEY.

N. A. WELCH July 31, 1962 DOOR LOCK 3 Sheets-Sheet 2 Filed March 4, 1957 IN V EN TOR.

Momma H. Wm 0/1 HTTOFPNEY.

July-31, 1962 Filed March 4, 1957 IHI N. A. WELCH DOOR LOCK 5 Sheeis-Shee; 3

FTTOPNEY.

United States Patent 3,047,323 DOOR LOCK Nicholas A. Welch, West Hartford, Conn., assignor to The American Hardware Corporation, New Britain, Conn., a corporation of Connecticut Filed Mar. 4, 1957, Ser. No. 643,568 13 Claims. (Cl. 292245) This invention relates to a door lock and more particularly to a lock which is especially intended for use on thin doors.

The primary object of the present invention is to provide a lock for use in the narrow, extruded aluminum frames of glass doors which are so frequently used today on modernistic store fronts and the like.

A further object of the invention is to provide a lock of the above type which can be used on doors of either hand.

A still further object of the invention is to provide a lock mechanism which can be incorporated in a narrow casing that may be readily mounted in the tubular frames :of said glass doors.

Further objects and advantages of this invention will be more clearly understood from the following description and the accompanying drawings in which:

FIG. 1 is a sectional plan view, on line 1-1 of FIG.

.3, showing my improved lock as installed in a tubular central vertical section.

FIG. 7 is a rear view thereof. FIG. 8 is a rear view of the latch unit used in said lock.

FIG. 9 is a similar view of the latch unit showing the same assembled for use in reversed position.

FIG. 10 is an elevational view of the rollback unit .used in the lock.

FIG. 11 is a sectional side view thereof.

FIG. 12 is an exploded isometric view of someof the parts included in the latch bolt unit.

FIG. 13 is a fragmentary side view of the lock with the latch bolt in dogged posit-ion; parts being broken away to show the construction thereof.

FIG. 14 is a sectional side view showing the latch unit in retracted position.

FIG. 15 is a similar view showing the latch bolt unit in projected position.

In the embodiment of the invention illustrated in the drawings, my improved lock includes a casing 5 which is preferably cut to proper length from an extruded bar of metal such as aluminum; the said casing being tubular in construction with an opening 6 therein in which the lock mechanism is contained.

The said mechanism includes a latch unit 7 having a latch bolt 8 that is slidable within the opening 6 in the casing between shoulders 9--9, on the opposite side walls of the casing, and an auxiliary bolt 10 which is slidable within said opening between the latch bolt and the lower wall 11 of said opening. Upon the bolt 8 there is mounted a dogging member 12 which is pivotally connected to the bolt by a stud 13 that is insertable into an opening -14 in the bolt. The said dogging member 12 has fingers 1515 extending perpendicularly from the tions.

opposite sides of the main body thereof into notches 1616 that extend across the opposite edges of the bolt. A dogging detent 17 extends perpendicularly from said main body into one of a pair of slots 18 which extend through the opposite Walls of the casing. Each of said slots 18 has an abutment 19 in the lower side thereof which is adapted to be engaged by the detent 17 when the dogging member is moved about its pivot under the influence of a spring 20 whichis contained within the notch 16 at the lower side of the latch bolt 8 and between the finger 15 of the dogging member, that extends into said notch, and the opposite wall of the notch.

The auxiliary bolt 10 carries a pin 22 which projects from the side thereof adjacent to the bolt 8 and is movable through the respective one of a pair of longitudinally extending notches 2323 in the opposite edges of. the bolt 8 into engagement with the opposite side of the said finger 15. The said auxiliary bolt is urged toward normal position, in which it is in register with the latch bolt 8, by means of a spring 24 which is anchored against a backing plate 25 on the casing and is stronger than the spring 20 so that the dogging member is normally retained in the position shown in FIG. 6. The bolt -8 is biased into its normal position, in which it is projected from the casing, by means of a spring 26 which is also anchored upon the plate 25. i

The said latch bolt unit is movable into unlatched or retracted position by means of an operating lever 27 which is pivoted on a pin 28 that extends through the opposite walls of the casing. Said lever projects downwardly into the notch 16 at the upper edge of the latch bolt 8 and is disposed between the finger 15 therein and the opposite wall of the said notch 16. The said operating lever is actuated by an operating member 29 which is also pivoted on the pin 28 and is normally urged in a clockwise direction, as viewed in FIG. 6, by means of a torsion spring 30.

The operating member 29 is actuated by an operating handle 31 having a shank 32 which extends through ice and is rotatable in an opening 32-0 in a cylinder 33 that is secured to the inner Wall of the casing. The said shank 32 has secured to the inner end thereof a rollback 34 having a projection 35v which engages the adjacent side 'of the opena-ting member 29 for rotating said member and thereby operatingthe lever 27. p

The said operating member 29 is adapted to move the operating lever.27 to retract the latch bolt, but said lever 'is movable in the same direction independently l of'tlie pin 37 that extends from the cylinder 33 and locates the said rollback and the handle 31 in their normal posi- The said rollback also has a notch 38 therein which is adapted to receive the stop pinv 37 for the purpose to be hereinafter described.

Upon the outer wall of the. casing 5 there is mounted a cylinder lock 39 of a conventional type which is threaded into an opening in said wall and has a suitable key-operated plug 40 extending therethrough. This plug has secured to its inner end an operating lever 41 which is adapted to engage the finger 15 at the upper side of the dogging member 12 and retract the latch bolt unit.

In order to retain the latch bolt unit in retracted position, as shown in FIG. 1-4, there is provided a holdback member 42 having opposed side portions 43-43 which are pivoted to the casing by means of studs 44-44 which extend into coaxial holes 45 in the opposite walls thereof. The said side portions of the holdback member are connected by an integral crossbar portion 46 which extends across the rear of the casing and is movable within notches 47-47 in the said walls of said casing. Adjacent to said crossbar portion of the holdback member, there is provided a projection 48 which preferably extends inwardly from at least one of the sides 43 of the said member and is adapted to engage one of a pair of abutments 49-49 at the rear of the latch bolt.

At the front end of the said holdback member there are provided upwardly extending portions 50-50 having therebetween a roller 51 which extends through opposed notches 52-52 in the opposite side walls of the casing. The said roller 51 and the crossbar 46 are adapted to be engaged by the key-controlled operating lever 41, as clearly illustrated in FIGS. 14 and 15, for a purpose to be also hereinafter described.

The front of the casing is closed by means of a face plate 53 which extends across the opening 6 in said casing and has an opening 54 therein through which are slidable the latch bolt 8 and the auxiliary bolt 10; the said plate being secured to the casing by means of screws 55-55 which are threaded into holes 56-56 that extend through the opposite end portions of the casing, as clearly illustrated in FIG. 6.

The operation of my improved lock, when in its normal position illustrated in FIGS. 1 to 7, is as follows: When it is desired to retract the latch bolt unit, the operating handle 31 is rotated in a clockwise direction, as seen in FIG. 6, so that it will rotate the rollback 34 therewith and thereby rotate the operating member 29 and the operating lever 27 in a counterclockwise direction. The said operating lever 27 will then engage the respective finger of the dogging member and move the latch bolt 8 into retracted position against the force of the spring 26. During the said movement of the bolt, the detent 17 of the dogging member will engage and slide along the upper side of the respective slot 18 in the wall of the casing. Engagement of the pin 22 of the auxiliary bolt with the finger 15 at the lower side of the dogging member will also cause the said auxiliary bolt to be retracted with the latch bolt against the force of the spring 24.

Release of the operating handle 31 will cause the latch bolt unit to be projected to its latching position and the operating lever 27 and member 29 to be returned to their normal positions by the respective springs 24, 26 and 30.

As shown in FIG. 13, when the latch bolt is in latching position, with the door closed and the latch bolt extending into the recess of a conventional strike, which strike is not shown, the auxiliary bolt 10 is in engagement with the outer surface of said strike and is thereby prevented from moving into its fully projected position. Therefore, the pin 22 on the auxiliary bolt will remain away from the respective finger 15 of the dogging member 12 and thus allow the spring to swing the said dogging member into dogging position wherein the detent 17 thereof is carried into engagement with the respective abutment 19 and thereby secures the latch bolt against being forced from its door-latching position into unlatching position while the door is closed.

When it is desired to secure the latch bolt unit in retracted position, this may be done by first retracting the latch bolt with the operating handle 31 and holding said bolt in retracted position. The key plug 40 is then rotated, with the proper key, so as to move the operating lever 41 into engagement with the crossbar portion 46 of the holdback member 42, as shown in FIG. 14. Further rotation of the lever 41 will force said portion 46 downwardly so as to move the projection 48 in front of the abutment 49 on the latch bolt, thereby holding the latch bolt unit back in its retracted position.

When the latch bolt is secured in retracted position, as above described, and it is desired to release the bolt unit so as to allow it to be moved into latching position, the key plug is rotated in the opposite direction, thereby moving the lever 41 into engagement with the roller 51 and rocking the holdback unit on its pivot so as to raise the projection 48 to disengage it from the abutment 49 and allow the bolt unit to be projected into latching position.

As shown in FIG. 15, when the latch bolt is in the latching position and it is desired to open the door from the outside, the lever 41 is rotated, with the key, past the roller 51 and into engagement with the finger 15 at the upper side of the dogging member. Further turning of the key plug will retract the bolt unit to its unlatching position and permit opening of the door from the out side.

In order to prevent the holdback member from interfering with the retraction of the bolt unit, in the event that said member has unintentionally, or by mistake, been moved into its holdback position, shown in FIG. 14, while the bolt was in its projected or latched position, there is provided upon the bolt 8 a stud 57 which is adapted to engage a camming projection 58 under the respective side of the holdback member, as the bolt is moved toward retracted position, and thereby rock the holdback member so as to raise the projection 48 out of the way of the bolt.

The said holdback member 42 is retained in its operative and inoperative positions by such retaining means as a projection 59 which is received in recesses 60 and 61 that are provided in either one or both sides of the casing.

The above described lock is particularly adapted for installation in a glass door having a frame that is constructed of tubular sections, such as the extruded section indicated at 62. For installation in such tubular frame sections, the casing of the lock is provided with end portions 63-63 which are adapted to overlap the upper and lower edge portions 6464 of an opening 65 that is cut in the said section and is of such size that the lock may be inserted therethrough into the interior of the frame. The casing is secured in the frame by means of jack screws 66-66 which are received in the holes 56-56 in the casing and are accessible from the front thereof. The jack screws are adapted to engage the rear wall of the door frame and, when tightened, force the casing against the inner side of the front wall of the section 62. The casing is retained in position by the face plate 53 which fits within the opening 65 flush with the outer surface of the section 62, all as fully described in the copending application of Nicholas A. Welch, Serial No. 644,590, filed March 7, 1957, and now Patent No. 2,919,571, issued January 5, 1960.

It will also be noted that by providing the slots 18-18 in the opposite walls of the casing and the notches 16 and 23 in both edges of the latch bolt, it is possible to reverse the latch bolt unit so as to adapt said lock to right or left hand doors of regular and reverse bevel.

The parts as above described and shown in all of the figures of the drawing, except FIG. 9, are arranged for a right hand door which opens inwardly, and the latch bolt is therefore operable by the handle 31 from the inside of the door; the key operated plug 40 being located at the outside of the door. When it is desired to use the lock on a door of reverse bevel, or one that opens outwardly, the latch bolt unit 7 is reversed with respect to the casing so that the bevelled surface 8a of the latch bolt 8, the dogging member 12 and the pin 57 will be at the opposite sides of the casing, as shown in FIG. 9. The spring 20 is placed in the opposite notch 16 and the auxiliary bolt 10 is reversed by first pushing the pin 22 therethrough so that it will project from its opposite side, and then placing said auxiliary bolt below the latch bolt and in the same position relatively thereto as clearly shown in FIGS. 6 and 8. No other reversal of parts is then necessary since the holdback member is operable at either side of the casing by the pin 57 on the latch bolt, and the pin 22 on the auxiliary bolt will move through the respective slot 23 into engagement with the finger 15 on the respective side of the holdback member. The said pin i2 is preferably of the tubular spring type so that it is frictionally retained in projecting position on the auxiliary bolt and still may be readily pushed therethrough to project from either side thereof.

When the lock is to be operated by the handle 31 and the key plug 40 from the sides opposite to those shown in the drawing, the cylinders 39 and 33 may be interchanged since they are threaded to fit in the threaded openings in either of the side walls of the casing and adapted to be secured in operative position therein by means of set screws 67- 67 As shown in FIG. 10, the rollback 34 may be locked in central position, by means of the spring pin 37, so as to permit the cylinder 33 to be rotated by the handle 31 for the purpose of turning said cylinder when assembling it to the lock casing. After the cylinder has been assembled to the casing, the said plate may be released by depressing the pin 37 against the tension of its spring 37-11.

I claim:

1. In a door lock, a casing having spaced sidewalls defining an opening therein, a latchbolt reversibly mounted in said opening for movement parallel to said sidewalls between a retracted position within said opening and a projected position extending from said opening, said latchbolt having a bevelled camming face at its outer end, means for dogging said latchbolt when said bolt is in projected position, said means including a dogging member pivotally mounted on said latchbolt for movement between dogging and undogging positions, the pivotal axis of said dogging member being normal to the longitudinal axis of said bolt and located at substantially the midpoint between the upper and lower edges of said bolt, said dogging member having finger portions extending outwardly from the said pivotal axis, said fingers having contact surfaces which are substantially equidistant from said pivotal axis and disposed in substantial alignment along a line normal to the longitudinal axis of said latchbolt, said dogging member further having detent portions spaced outwardly a substantially equal distance from said pivotal axis and from a line through said pivotal axis extending normal to a line through said contact surfaces, and means on said casing in the form of an abutment engageable by one of said detent portions when said dogging means is rocked about said pivotal axis whether said latchbolt has been selectively inserted in said casing in inverse right and left hand positions to properly locate said camming face for a right or left hand door, spring means selectively positionable between said dogging member and said latchbolt to bias said dogging member toward dogging position in either selected position of said latchbolt, and operating means coacting with one of said contact surfaces on said finger portions in either selected reversed position of said latchbolt to move said dogging member out of dogging position and to retract said latchbolt.

2. In a door lock, a casing having spaced sidewalls defining an opening therein, a latchbolt reversibly mounted in said opening for movement parallel to said sidewalls between a retracted position within said opening and a projected position extending from said opening, said latchbolt having a bevelled camming face at its outer end, means for dogging said latchbolt when said latchbolt is in projected position, said means including a dogging member pivotally mounted on said latchbolt for movement between dogging and undogging positions, the pivotal axis of said dogging member being normal to the longitudinal axis of said bolt and located at substantially the midpoint between the upper and lower edges of said bolt, said dogging member having finger portions extending outwardly from the said pivotal axis, said fingers having contact surfaces which are substantially equidistant from said pivotal axis and which are disposed in substantial alignment along a line normal to the longitudinal axis of said latchbolt, said dogging member further having detent portions spaced outwardly a substantially equal distance from said pivotal axis and from a line through said pivotal axis extending normal to the plane containing said contact surfaces, and means on said casing in the form of an abutment engageable by one of said detent portions when said dogging means is rocked about said pivotal axis whether said latchbolt has been selectively inserted in said casing in inverse right and left hand positions to properly locate said camming face for a right or left hand door, spring means selectively positionable between said dogging member and said latchbolt to bias said dogging member toward dogging position in either selected position of said latchbolt, an auxiliary bolt mounted in said casing for movement parallel to said latchbolt between a depressed position Within said opening and a projected position extending from said opening, said auxiliary bolt having a bevelled camming face at its outer end disposed similarly to the bevelled camming face on said latchbolt, a projecting part on said auxiliary bolt coacting with one of the finger portions of said dogging member to retain said dogging member out of dogging position when said auxiliary bolt is projected and enabling movement of said dogging member to dogging position under the influence of said spring means when said auxiliary bolt is depressed, and operating means mounted on said casing coacting with the contact surface of the other of said finger portions in either selected reversed position of said latchbolt to move said dogging member out of dogging position and to retract said latchbolt.

3. The subject matter as set forth in claim 2 wherein said auxiliary bolt is also insertable into said opening in inverse right and left hand positions and said projecting part is connectable thereto in reversed projecting positions for coaction with the finger portion on said dogging member adjacent said auxiliary bolt in either selected position of said latchbolt.

ft. In a door lock, a casing having spaced sidewalls defining an opening therein, a latchbolt reversibly mounted in said opening for movement parallel to said sidewalls between a retracted position within said opening and a projected position extending from said opening, said l-atchbolt having a bevelled camming face at its outer end, means for dogging said latchbolt when said latchbolt is in projected position, said means including a dogging member pivotally mounted on the side of said latch bolt for movement between dogging and undogging positions, the the pivot axis of said dogging merrrber being located at substantially the midpoint between the upper and lower edges of said bolt, said dogging member having portions extending outwardly from the said pivotal axis, each portion having contact fingers substantially equidistant from said pivotal axis and extending transversely of the longitu dlnal axis of said bolt, said fingers being in substantial alignment along a line normal to the longitudinal axis of said bolt, said dogging member further having detent portions spaced outwardly a substantially equal distance from said pivotal axis and from a line through said pivotal axis extending norm-a1 to a line through said contact fingers, and means on opposite sides of said casing in the form of abutrnents selectively engageable by one of said detent portions when said dogging means is rocked about said pivotal axis whether said latchbolt has been selectively inserted in said casing in inverse right and left hand positions to properly locate said camming face for a right or left hand door, spring means selectively positionable between said dogging member and said latchbolt to bias said dogging member toward dogging position in either selected position of said latchbolt, and operating means coacting with one of said contact fingers in either selected reversed position of said latchbolt to move said dogging member out of dogging position and to retract said latchbolt.

5. In a door lock, a casing, a latch bolt slidable in said casing between projected and retracted positions and spring pressed into projected position, an operating lever mounted upon said casing for rotation in opposite directions and having a free end portion engageable with and adapted to retract said latch -bolt, an abutment on said latch bolt, a latch bolt holdback member pivotally mounted intermediate its ends upon said casing for rocking movement into and out of holdback position and having a projection thereon which, when the latch bolt is in retracted position and the holdback member is in holdback position, is disposed in the path of said abutment thereby preventing projection of said latch bolt, said holdback member having transverse portions at opposite sides of its pivotal connection engageable by the free end of said operating lever whereby, when said lever is rotated in one direction it engages one of said portions and rocks said holdback member into holdback position and when rotated in the opposite direction it engages the other of said portions and rocks said holdback member out of holdback position.

6. The subject matter of claim wherein said other transverse portion of the holdback member is normally disposed out of the path of said operating lever and is lo. cated in its path only when the holdback member is disposed in holdback position.

7. The subject matter of claim 5 wherein said transverse portions of the holdback member extend across the casing and are thus engageable by the operating lever when located at either side of the casing.

8. A lock as set forth in claim 5 wherein the holdback member has a cam portion and the latch bolt has a projection thereon engageable with said cam portion for moving the holdback member out of holdback position as the latch bolt is moved toward retracted position.

9. A lock as set forth in claim 5 wherein the holdback member has a cam portion at opposite sides of the casing engageable with a projection on the adjacent side of the latch bolt when the latch bolt is in different positions within the casing and the said projection is disposed at either side of the casing.

10. In a door lock, a casing having side walls defining an opening therein, a latch bolt slidable in said opening between projected and retracted positions and spring pressed into projected position, an operating lever mounted upon one of said side walls for rotation in opposite directions and having a free end portion engageable with and adapted to retract said latch bolt, an abutment on said latch bolt, a latch bolt holdback mem ber including side portions extending along the outer sides of said side walls and pivotally mounted intermediate their ends on said side walls whereby said holdback member is adapted for rocking movement into and out of holdback position, a projection on at least one of said side portions movable into the path of said abutment when the latch bolt is retracted and the holdback member is in holdback position whereby movement of the latch bolt to projected position is prevented, crossbars extending between the opposite ends of said side portions and transversely across the opening in said casing, said crossbars being engageable by the free end of said operating lever whereby, when said lever is rotated in one direction it engages one of said crossbars and rocks the holdback member into holdback position and when rotated in the opposite direction it engages the other of said crossbars and rocks said holdback member out of holdback position.

11. The subject matter set forth in claim 10 wherein at least one of the side portions of said holdback member is provided with a cam surface and said latch bolt is provided with a pin adapted to engage said cam surface upon retraction of said latch bolt to thereby move said holdback member out of holdback position.

12. A door lock including a casing having an opening therethrough, a bolt slidable in said opening between pro. jected and retracted positions, an operating lever for moving said bolt to retracted position, a supporting cylinder threaded into a hole in a side wall of said casing and extending into the opening therein, an operating handle having a shank rotatably mounted in said cylinder and extending therethrough, a rollback member secured to the inner end of said shank, means connecting said rollback with the operating lever, a stop pin movably mounted in said cylinder and normally positioned for engagement by said rollback for locating the operating handle in normal position, spring means for yieldingly urging said rollback into engagement with said stop pin, and an abutment on said rollback engageable with said stop pin for securing the rollback to the cylinder in a position wherein it is located within the periphery of the cylinder to permit entry of said cylinder into the hole in the side wall of the casing.

13. A door lock including a casing, a latch bolt slidable in said casing between projected and retracted positions, an operating lever rotatably mounted on said casing and having a connection with said latch bolt whereby depression of said bolt results in movement of said operating lever, an operating member rotatably carried by said casing for actuating said operating lever, means providing a lost motion connection between said operating member and said operating lever permitting independent movement of said operating lever upon depression of said latch bolt, a rollback rotatably carried by the casing for rotating said operating member to thereby actaute said operating lever and retract said latch bolt, a handle for rotating said rollback, a stop pin engageable by said rollback for locating the said handle in normal position, and spring means for yieldingly urging said operating member into contact with the rollback and the rollback into contact with said stop pin.

References Cited in the file of this patent UNITED STATES PATENTS 689,334 Taylor Dec. 17, 1901 771,542 Fletcher Oct. 4, 1904 1,184,919 Bock May 30, 1916 1,991,120 Rightmeyer Feb. 12, 1935 2,327,071 Schlage Aug. 17, 1943 2,426,141 Kell Aug. 19, 1947 2,516,991 Heyer Aug. 1, 1950 2,533,023 Lickteig Dec. 5, 1950 2,549,983 Miller Apr. 24, 1951 2,558,509 Cerf June 26, 1951 2,769,652 Mauritis et al Nov. 6, 1956 2,770,480 Linton Nov. 13, 1956 2,823,538 Fresard Feb. 18, 1958 2,854,270 Ward Sept. 30, 1958

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