US2613094A

US2613094A - Reversible latch bolt unit

Info

Publication number: US2613094A
Application number: US104178A
Authority: US
Inventors: Ernest L Schlage
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-07-12
Filing date: 1949-07-12
Publication date: 1952-10-07
Anticipated expiration: 1969-10-07

Description

2 SHEETS--SI-IEE IT 1 FIG. 5.

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C 1952 E. L. SCHLAGE REVERSIBLE LATCH BOLT UNIT Filed July 12, 1949 & CT. .M. 3H m \5 m m mum...

Oct; 1952 E. L. SCHLAGE REVERSIBLE LATCH BOLT UNIT 2 SHEETS-SHEET 2 Filed July 12, 1949 \llll INVENTOR. W i. 3211b;

ATTOR Y.

Patented Oct. 7, 1952 UNITED STATES PATENT OFFICE REVERSIBLE LATCH BOLT UNIT Ernest Schlage, Burlingame, Calif.

Application July 12, 1949, Serial No. 104,178

especially to a reversible dead latching mechanism therefore.

The object of the present invention is generally to improve and simplify the construction and operation of dead latching machanisms, and especially to provide a latching mechanism including amainlatch bolt and a cooperating dead bolt which are reversible as a unit prior to installation to permit either a right or left-hand positioning of the latching mechanism when installed in doors. p l r The invention is shown by way of illustration in the accompanying drawings, in which,

Fig. 1. is a perspective view of the latch bolt unit of the lock.

Fig. 2 is a perspective view of the latch bolt actuating unit. r

Fig. 3 is a vertical side view partially in section, said view being takenon lines III--III of Fig. 4.

Fig. 4 is a horizontal view partially in section taken on line IV--IV of Fig. 3;

Fig. 5'is an enlarged perspective view of the crank.

Fig. 6 is an enlarged perspective view of the crank'hub before it is applied to the crank.

Fig. 7 is a vertical side view partially insection, saidview showing the latch boltunit in a position reversed with relation to that shown in b dead bolt.

Fig. 13 is an enlarged perspective view of one of the dogging members. i

Fig. 14 is an enlarged perspective view of one of the spring seats, and r l Fig. 15 is a perspective view of one of the plate sections forming the anchor.

A door latch actuating unit A is inserted in a hole 2 drilled transversely through a door (land a latch bolt unit B is inserted in a hole3 drilled at right angles to the hole 2 or from the edge of the door. The unit A actuates a flat spindle bar 13 Claims- (erase-244) 4 which in turn actuates a latch bolt l6 carried by the unit B. The bar 4 may be rotated by a key 5 from one side of the door C or by a knob or .turnpiece 6 from the other side of the door. The unit A is also provided with a pair of anchor posts 'l--!, a pair of escutoheon plates 9 and 10, and1a pair of screws 8--B insertable in the posts l'! which are internally threaded.

The latch bolt unit B comprises a face plate I l and a circular cylindrical latch bolt housing [3, and these carry a latch bolt IS, a deadlatching bolt or dead bolt H, a latch bolt retracting mechanism and a dogging mechanism actuated by the dead bolt IT. The faceplate is composed of an outer sheet II and an inner sheet l2 riveted together or otherwise secured. The face plate carries a circular cylindrical latch bolt housing l3 ope at its outer end and havin a closed inner end [4. The open end is provided with an outwardly extending annular flange I5 received,

between the face plate sheets II and 12, and when these are riveted together, the latch bolt housing becomes rigidly secured to the face plate.

Extending through the openend of the latch bolt housing and through theface plate are a latch bolt I6 and a dead locking bolt ll. Suitably securedto the latch bolt I6 and extending rearwardly therefrom is a bar [8 composed of two plates (see Figure 10). Both plates are cut away to form shoulders |9I9 and one plate carries a guide lug 20. Also carried by the bar I8 is a pin 2| which connects with one endof the re-' tractor. 22, the opposite end of the retractor being connected with a crank 23.

The dead bolt ll (see Fig. 12) is substantially cylindrical throughout its length. However, the outer end has a fiat 24 on oneside to form a shoulder 25 and also to engage the fiat ,face 16a of the latch bolt 16. An annular groove 26 is formed behind the shoulder 2-5. The inner end of the dead bolt is tubular to telescope over a guide pin 21 secured to the inner, closed end [4 of thelatch bolt housing. A similar pin 21a is also provided and a tubular member 28 is secured to the latch bolt It so as to telescope over the pin. A compression spring 29 surrounds each pin. The springs engage shoulders formed respectively on the tubular member 28 and on the dead bolt. These springs normally function to maintain the latch bolt and the dead bolt in an extended position, and also actuate a pair of dogging members, one of which is shown in Figure 13. Each dogging member is provided with a pair of rocker arms 30 which are connected with or formed as an integral part of a dogging arm 3|. The rocker arms are disposed on an angle of less than 90 degrees with relation to the dogging arm, so as to form a rocker-like support 32 for each dogging arm.

A spring seating plate, as shown in Figure 14, is on each of the guide pins 21 and 21a. The springs 29 seat on the respective plates and as 'the plates engage or rest on the rocker arms 30,

a force is exerted which tends to maintain the offset tips 3 la of the dogging arms 3| in engagement with the shoulders |9|9 formed on the bar I8.

A slide 33 (see Figure 11) has two cams 34 formed thereon to engage the dogging arms 3| and normally maintains the doggin arms out of engagement with the shoulders |9-|9, as shown in Figure 7. The slide 33 is movable alongside the bar l8 and is actuated by the dead locking bolt H. The slide and its earns 34 may be moved to a position rearwardly of the tips 3Ia formed on the dogging arms. When this position is assumed, the dogging arms swing toward the bar I8 and engage the shoulders |9|9 thereby deadlocking the latch bolt I3. The slide 33 has a longitudinal slot 35 to receive the guide lug 29 formed on the bar I8. Also, a pair of lugs 36 are formed on the slide 33 and extend into the annular groove 26 formed on the dead bolt. Thus, when the dead bolt is depressed, the slide 33 moves inwardly i unison therewith and the 33 moves outwardly with it and the cams 34,

engage and lift the doggin arms 3| out of engagement with the shoulders |9|9.

In actual operation, whe a door containing the lock here shown is closed, the latch bolt I6 will be depressed when it engages the striker plate (not shown) which is mounted in the door frame; The bolt I! will also be depressed in unison with the latch bolt because the latch bolt engages the shoulder 25 formed on the dead bolt. The dead bolt will remain depressed when the door is fully closed while the latch bolt -will only be momentarily depressed as an opening is formed in the striker plate into which the latch bolt is automatically projected by its spring 29. As the dead bolt remains depressed, the slide 33 with its cam 34 remains in its inner position and the dogging arms therefore engage the shoulders |9|9 and maintain the latch bolt in a dead locked position.

The door may be opened either by the key or the knob or turn piece 6. In either instance, the spindle bar 4 is rotated and the crank arm 23 swings rearwardly, thus pulling the retractor 22 in the same direction. The forward end of the retractor has a longitudinal slot 59 to permit it to be moved a predetermined distance before engaging the pin 2| on the bar 8. A pair of cams 31 are formed on the retractor 22 on opposite sides of the slot 59. These cams engage the tips 3|a of the dogging arms 3| during the predetermined movement and lift the dogging arms out of engagement with the shoulders I 9-| 9 just before the pin 2| is engaged, thereby permitting full retraction of the latch bolt by the key or the turn piece.

One of the important features of the present invention is that the latch bolt unit B may be reversed to fit either a right or left-hand door. The latch bolt unit B as a whole is positioned to fit either a right or left-hand door, this being accomplished prior to installation by merely rotating the unit as a whole about its longitudinal axis degrees so as to make the flat face I611 of the latch bolt face toward one side or the other depending upon whether a right or lefthand (1001' is to be fitted. In view of the fact that the actuating unit A is not reversible, provision is made to permit changing of the position of the crank 23. If the latch bolt unit is inserted in a right-hand door in the position shown in Figure 3, the flat face of the latch bolt faces away and the hub end of the crank is in a position near the bottom of the hole 2. Now, if the latch bolt unit is removed and rotated about its longitudinal axis 180 degrees, as shown in Figure '7, then the hub of the crank is in a position near the top of the hole 2. But the spindle bar 4 is not reversible, and always is in a fixed position near the bottom of the hole 2. Consequently, the hub end of the crank is swung toward the lower part of the hole 2 for eithera right or left-hand door installation.

The structure that permits this comprises an anchor 39 in which is formed a arcuate slot 38 and two pairs of

openings

40 and 4| to receive the anchor posts l-l. The anchor may be made of a single plate but, in this instance, is madeof two plates with a lug 42 on the end of each (see Figure 15). A slot is formed in the inner end 4 of the latch bolt housing. The anchor projects through this slot and so does the retractor- 22, while the lugs 42 are fastened to the inner end I4 by riveted extensions 5| formed on the guide pins 21, thus reenforcing the inner end of the latch bolt housing and at the same time rigidly securing the anchor.

A bushing 44 (see Figure 6) extends through the crank 23 forming a hub and also extends freely through the arcuate slot 38 to permit the hub to be swungfrom one end of the slot to the other. The crank is punched out and has four notches 45 formed therein. The bushing is provided with

prongs

46 and 41 at opposite ends. The prongs 41 are bent at right angles to engage one face of the anchor while the prongs 46 are bent into the notches 45 and against the crank so as to secure the bushin to the crank and against endwise removal from the anchor. The notches 45 are considerably deeper than the thickness of the metal forming the prongs, so that after they have been bent into place, enough space still remains to form splines to receive the spindle bar 4. The notches are disposed in pairs diametrically opposite each other, so that one pair receives the spindle bar in one position of the crank and the other pair receives the spindle bar in its other position. In changing the latch bolt unit from a right to a left-hand position or vice versa, the hub end of the crank is swung to the lower end of the arcuate slot 38, the slot 59 in the front end of the retractor being sufficiently long to provide the play required. Figure 9 shows the crank arm as it is being swung from one position in the arcuate slot into the other. The slot 50 in the front end of the retractor permits two functions, first, that of allowing a predetermined preliminary movement of the crank and retractor when opening a door, so that the dogging arms 3| may be released before the latch bolt I6 is retracted and second, that Of p v di -t e p y or free movement re.- quired to swing the hub end of the crank from one end of the arcuate slot 38 to the other."

The anchor posts are positioned slightly below the center of the actuating unit A. Due

to this fact two setsor pairs of openings 4|! and 4t areformed in the anchor. The posts'project throughone pair of openings whenaright-hand door is fitted and through the other pairof openings when the latch bolt unit is placed in a lefthand doorfi; if theanchor posts are placed on the center line ofthe actuating unitfonly "one pair of openings will be required. g

@While the invention has been described asapplied to a dead locking latch bolt unit, I also contemplate making units of this character which do not require dead locking, that is, the dead locking bolt and the dogging mechanism actuated thereby is eliminated; the invention being applicable to a-latchbolt unit of this characross said axis, a crank, a hub engagin thecrank and projecting through the slot and movable therein from one side of the axis to the other, and a retractor connecting the crank with the latch bolt.

2. A door lock with a reversible latch bolt unit comprising a housing having a longitudinal axis, a latch bolt projecting from said housing, an anchor secured to the housing, there being a slot formed in said anchor extending transversely across said axis, a crank, a hub engaging the crank and projecting through the slot and movable therein from one side of the axis to the other, a retractor connecting the crank with the latch bolt, and a spindle engaging said hub to impart movement to said crank.

3. A door lock with a reversible latch bolt unit comprising a housing having a longitudinal axis, a latch bolt projecting from said housing, an anchor secured to the end of the housing, there being an arcuate slot formed in said anchor extending transversely across said axis, a crank, a hub engaging the crank and projecting through theslot and movable therein from one side of the axis to the other, a retractor connecting the crank with the latch bolt, and a spindle member projecting through the hub to impart movement thereto.

4. A door lock with a reversible latch bolt unit comprising a housing having a longitudinal axis, a latch bolt projecting from said housing, a dead bolt also projecting from said housing, dogging arms actuated by the dead bolt for dogging said latch bolt against depression, an anchor secured to the end of the housing, there being an arcuate slot formed in said anchor extending transversely across said axis, a crank, a hub engaging the crank and projecting through the slot and movable in said slot from one side of the axis to the other, a retractor connecting the crank with the latch bolt, said crank and said retractor moving across said axis with said hub, and cams on said retractor for engaging said dogging arms in either position of said retractor with respect to said axis.

5. A door lock with a reversible latch bolt unit comprising a housing having a longitudinal axis,

a face plate secured at the outer end of said housing, a latch bolt projecting"iromsaidhousing through the face plate,-a dead bolt also "projecting through the fac'e plate, dogging arms actuated" bythe dead bolt for dogging the latch bolt against depression, ananchor secured to the end of the housing, there being a arcuate slot formed in said anchor extending transversely acrosssaid axis, a crank, a hub; engaging the crank and projecting through the slot and movable in said-slot from one side of the axis to the other, a retractor connected at one' endwith the crank, means at the other endotthe retractor for retracting the latch bolt,said crank and said retractor moving across said axis with said hub and means on the retractorfor' releas ing the dogging arms in either position of said retractor with respect to said axis. U6.' "A reversiblelatch bolt unit comprising "a elongated housing having a longitudinal axis, a latchboltprojecting from one end of said housing, an anohor'secured tothe other end of the hous ingysaid anchor having an elongated slot therein extending transversely across said axis, acranki a hub for said crank disposed i said slot, said hub being movable in said slot between two extreme positions at opposite ends of said slot, and a retractor connecting the crank with the latch bolt in all positions of said hub.

'7. A door lock with a reversible latch bolt unit comprising an elongated housing having a longitudinal axis, a latch bolt projecting from one end of said housing, an anchor secured to the other end of said housing, said anchor having an elongated slot therein extending across said axis, a crank, a hub for said crank disposed in said slot, said hub being movable in said slot between two extreme positions at opposite ends of said slot, a retractor connecting said crank with the latch bolt, and a spindle projecting through said hub and said crank to impart movement thereto.

8. A door lock with a reversible latch bolt unit comprising an elongated housing having a longitudinal axis, a latch bolt projecting from one end of said housing, an anchor secured to the other end of the housing, said anchor having an elongated slot therein extending across said axis, a crank, a hub for said crank disposed in said slot, said hub being movable in said slot between two extreme positions at opposite ends of the slot, a retractor connected to said crank, a slotted connection between said retractor and said latch bolt, and a spindle projecting through said hub and said crank to impart movement thereto.

9. A door lock with a reversible latch bolt unit comprising a housing, a latch bolt slidable within said housing, a pin on said latch bolt and movable along a line, an actuating spindle disposable in either of two positions on opposite sides: of said line, a crank connected to said spindle and extending across said line when said spindle is in either one of said positions, and a retractor at one end connected to said pin and at the other end connected to said crank on the opposite side of said line from said spindle.

10. A door lock with a reversible latch bolt unit comprising a housing, a latch bolt slidable within said housing alon a longitudinal axis, a crank rotatable with respect to said housing about either one of two transverse axes on opposite sides of said longitudinal axis, a retractor pivotally I connected to said crank, and a longitudinal lostmotion connection betwee said retractor and said latch bolt.

11. A door lock with a reversible latch bolt unit comprising a housing, a latch bolt slidable within said housing along a longitudinal axis, a crank rotatable with respect to said housing about either one of twoaxes extendin ina transverse direction and disposed on opposite sides of said longitudinal axis, said crank being shiftable across said longitudinal axis between said two axes, a retractor, and connections between said'retractor and said crank and between said retractor. and said latch bolt, one of said connections being a lost-motion connection affordingrotation of said crank toward said latch bolt as said crank is shifted across said longitudinal axis while said latch bolt is stationary.

12; A door lock with a reversible latch bolt unit comprising a circular cylindrical housing having a longitudinal axis, an anchor extending from said housing along said axis, said anchor having a slot therein extending acrosssaid axis, a hub movable in said slot across said axis, means for holding said hub on either side of said axis, a latch bolt slidable within said housing, and operating connections between said hub and said latch bolt.

13. A door lock with a reversible latch bolt unit comprising a circular cylindrical housing having a longitudinal axis; an anchor extending from said housing alon said axis, said anchor having a slot therein extending across said axis; a latch bolt slidable within said housing; a retractor connected to said latch bolt; a crank connected to said retractor; and a hub on said crank movable in said slot across said axis while said crank, said retractor and said latch bolt are connected.

ERNEST L. SCHLAGEA REFERENCES CITED The following references are of record in the file of this patent: I

UNITED STATES PATENTS Number Name Date, 1,739,654 Schlage Dec. 17, 1929 1,876,080 Schlage Sept. 6, 1932 1,876,081 Schlage Sept.6, 1932 2,307,038 Gutman Jan. 5, 1943 Heyer Aug. 1, 1950