US1700487A - Door latch - Google Patents

Description

Jan. 29, 1929. o. P. CRAMER DOOR LATCH Filed May '7, 1927 2 Sheets-Sheet 2 l/v VEN roe O 77'0 EE HIS A TTOR/YEK Patented Jan. 29, 1929.

1,700,487 yPATENT OFFICE.

OTTO IP. GRANIER, OF SAN IERAN'CISCO,y CALIFORNIA.

- noonv Laren.

Application led May 7, 1927. Serial' No. 189,468.

My invention relates to fastening means for doors, and has for an obj ect the provision of a door latch of such construct-ion that skilled mortising of the door is not required to mount the latch in position.

Another object is the provision of a door 'latch having a bolt adjustable sov that the amount of projection of the bolt from the latch is variable.

Another object is the provision of an inexpensive door latch of sturdy construction I set forth in the following description of the parallel to the sides of the door 8. A bolt and dependable operation, and composed of few and simple parts.v

The invention possesses many other objects and valuable features, some ofvwhich will be invention which is illustrated in the drawings forming part of the yspecification'. It is to be` understood that I do not limit myself to .the showing madeby the said description and drawings, as I may adopt varying forms of my invention within the scope of the claims.

Referring to the drawings:

Figure 1 is a horizontal sectional view through the latch and a portion of the door and jamb with which it is used.

Figure 2 is a vertical sectional View of a ortion of the bolt, the direction of. view be- 1ng indicated by the arrows 2 2 of Figure 1.

Figure 3 is a vertical sectional view of the bolt, the direction of view being indicated by the arrow 3 of Figure 2.

Figure 4 is an elevation of the dogging portion of the latch', partly in vertical section, the plane of section being indicated by the line 4-4 of Figure 1. v

Figure 5 is a vertical sectional view of a different embodiment of the latch.

Figure 6 is a horizontal sectional view of the latch of Figure 5, the plane ofjsection bev-A ing indicated by the line 6-6 of Figure 5.

Figurej7 is an elevation, partly in vertical section, of the dogglng and releasing means,

the plane of section being indicate by the permit latching the door, a pin is provided by which the bolt in "its extended position and the caslng may be dogged together. The pin 1s operated by pressing one of two buttons to dog or release the bolt, as the case mightbe; and the entire means for operating the pin is mounted .on the exterior of the door within a housmg concentric with the shaft. As a result, the mounting of the latch in the door requires no skillful laying out or chiseling and the only operations necessary are the boring of a few holes on readily determined centers. An lembodiment of the invention is shown 1n Figures 1 to 4 inclusive and comprises a preferably tubular casing 6 mounted within a hole 7 preferably bored horizontally and is slidablymounted within the casing and comprises acylindrical portion 11 having one side 12 flattened and its outer end provided with an inclined face 18, so that when the door is closed, a latching engagement of the boltwith the strike plate 14 on the jamb 16 may be effected. The portion 11 of the bolt is rotatable within the casing, and is threaded to a rod 17, so that the eective length of the bolt, or the distance that the bolt projects beyond the edge of the door may be varied. When the proper adjustment has been made, further turning of the portion llupon the rod 17 is prevented by securing a guard plate 18 in position upon the edge of the door, so that the portion 11 extends through an aperture of corresponding shape in the guard plate. The rod 17 is slidable longitudinally in the end 19 of the body 21 of the bolt; and a spring 22, compressed between the .portion 11 and the body 21 of the bolt, urges the latch plate engaging portion outwardly from the body ortion. It is thus seen that the portion 11 o the bolt can bepressed back into the casing 6 e `26, compressed between the inner end 27 of the body 21 and the inner end 28 of the casing 6, urges the entire bolt outwards; and a guide 31 on the end 27 of the bolt is slidable through an aperture .in the end 28 of the casing to permit reciprocation of the bolt. The

roXimal to the inner side 25 fil end 32 of the guide is upset to limit the outward motion of the bolt.

' Shoulders 36 are provided on the Inside of the end 27 of the bolt, leaving a recess 37 between them. Extending through the recess and the holes 38 and 39 through the body of the bolt and the door respectively is .a shaft 41 having a cam 42 secured thereto 41n register with theshoulders, so that when the shaft is rotated through about 45 in either direction, the bolt is retracted. The shaft and the hole in the door, in which it lies, are both perpendicular tothe axis of the hole 1n which the casing is positioned. To turn the shaft, door'knobs 43 are adjustably secured v to each end of the shaft; and the assembly of knobs, shaft, and cam are mounted for rotary movement on the housings 44 and 46, 'suit-l ably secured to the inner and outer sides of the door, as by screws 47.

Means are provided' for dogging the bolt in its extended position to prevent opening the door. A pin 51 isadapted to be inserted through an aperture in one side of the casing 6 into an aperture in the body of the bolt alined therewith when the bolt is in its'extended position, thus preventing the retraction of the bolt by turning the shaft 41'. The end of the pin is tapered, and is in a-lin'ement with the inclined edge 24 of the plate 23. `If v the pin 51 has been set to dog the bolt, and then the door is closed, the portion 11 is pressed into the casing by engagement with the strike plate, and the pin 51 is forced out of engagement with the boltl by the edge 24. Thus shuttingl the door Will release the pin, should it have been previously set.

To accommodate the pin, an additional hole 52 through the door is provided adjacent the hole 39 and parallel thereto.

Means entirely exterior of the door for o )eratinff the bolt dog infr means are ro' l s g e P vided on the inner side of the door within the housing 44. A stationary plate 56 having lugs 57 struck therefrom to fit the bore of the hole 39 so as'to properly position the plate, is suitably secured to the -inner side 25 of the door, and extends over the hole 52, where a tubular guide 58 is provided 'for the (logging pin. A second plate 59 is mounted for rocking movement upon the ears 61 struck from opposite edges of the stationary plate. The pin 51 is secured to one end of the rocking `plate by means of a pivotal joint capable of permitting movement, so that the pin can be moved longitudinally by rocking the plate Without moving the pin laterally. The pin is of such length that its end 62 projects through the housing, so that the pin may be engaged with the bolt simply by pushing the end 62 into the housing to the end of its stroke. This causes the plate 59 to be rocked, forcing the button 63, pivoted in a similar fashion to the other end of the plate, outwards through the a limited degree of lateral be automatically released by the plate 23 impinging u on the tapered end of the dogging pm and orcing it out of engagement with the bolt. No mortising is necessary for the installation of the latch other than drilling holes 39 and 52 through the door and perpendicularly to the sides thereof, and hole 7 into the edge of the door parallel tothe sides.

In some communities it is required that latches used on-bath room doors be so constructed that they may be released from the outside. To comply with this requirement, I include housing .and the plate 23. An arm 69 on the lever extends through an aperture 71 in the in latches intended to be usedy on such doors a stationary plate 66, suitably secured to the outer side of the door under the' Sli housing 46, so that when the arm is depressed, f

the lever forces the plate 23 inwards, carrying with it the rod 17 and portion 11 of the bolt, and forcing the pin 51 out of engagement with the bolt. I

In Figures 5, 6, and 7 is shown an embodiment of the latch of myinvention adaptable for use on an outside door.d In this form of the latch, the in the embodiment first explained, is pivoted to a plate 76 mounted for rockin upon a stationary plate 77 suita to the inner side 25 of the door 8, upturned-ears 78 for retaining the housing 44 in position. The pin 74 does not extend through the housing, but the plate 76 is provided with arms 79 and 81 at its ends corresponding to the buttons 62 and 63 respectively. These arms 82 and 83 respectively in the sides of the housing 44. latching means more accessible than when the buttons are employed.

Instead of the lever 68 of Figure 1, the means for unlatching the door from the o utly secured and having movement vabout its axis, secured to the plate. 7 7 and extending loosely` through the arcuateslots 88 in the platel 86.

An arcuate projection or flange 89 having a This arrangement `makes the pin 74 corresponding to pin 51 movement project through apertures V-shaped notch 91 is so positioned upon the edge of the plate 86 that the arm 79 is disposed within the notch. Thus it is seen that Vwhen the pin 74 is in enga ement with the bolt 21, disengagement may e effected by rotatingy the plate 86 in either direction, thus rocking the plate 76 by the contact of an edge of the notci against the arm 79. y l

Means operable by key from the outer side l of the door are provided for rotating the plate 86. Suchmeans com rise a pair of extensions 92 on the plate, between which is positioned a lever 93 secured to the barrel 94 of a standard key operated lock 96 having its key-hole in the outer side 97 of the door. A cover 98 is retained over the lever 93 and rear end ot' the lock byscrews 99 threaded into the body ot' thelock:

The4k housingl 46 on the outer side of the door is retained in position similarly to the housing 44 by a. plate 101 with ears 102 over which the housing is pressed.

To latchthe door, the arm 79 is depressed, forcing the pin 74 into engagement With the bolt 21 as previously described. Of course this must be done from the inner side of the door, and forthat reason, the plate 23 for automatically' releasing the pin 74, When the door is closed, is omitted, and the relatively small Washer 103 secured to the end of the rod 17 in its place to limit the outward movement of the portion 11 of the latch bolt.4

I have found that a leushing 104 upon the shaft 41 to center the shaft in the hole 39 inthe door is an aid in assembling and helps the shaft to turn more smoothly by maintaining the shaft in alinement With the hole;

I claim:

1. A door latch comprising a casing adapted to be mounted Within the door, a spring pressed -latch bolt slidably mounted Within said casing, means for retracting said bolt,I a plate adapted to be mounted for rockin movement on one side of the door and a pin lcJarried by said plate for dogging the latch olt.

2. A door latch comprising a casing adapted to be mounted Within the door, a spring pressed latch bolt slidably mounted Within said casing, means for retracting said bolt, a plate adapted to be mounted for rocking movement on one side of the door, a pin carried by said plate for dogging the latch bolt, a housing surrounding the' plate, and means extending from the housing for operating the plate.

8. A door latch comprising a casing adaptcd to bc mounted within the door, a spring pressed latch bolt slidably mounted Within said. casing, means fo1"retrac.ting said bolt, a plate adapted to be mounted for rocking movement on one side of the door. a pin carried by said plate for dogging the latch bolt, a housing surrounding the plate, and arms eX- tending from the housing for operating the plate.

4. A door latch comprising a casing adapted to be mounted within the door, a spring pressed latch boltslidably mounted within said casing, means forretracting said bolt,

means adapted to be arranged on one side of the door for clogging the bolt, means adapted to be arranged on the same side of the door for releasing the bolt, and means adapted to be arranged on the oppositeside of the door@ for releasing the bolt.

5. A door latch comprising a casing adapted to be mounted within the door, a spring pressed latch bolt slidably mounted Within said casing, means for retracting said bolt, a pin movable transversely of the latch bolt to dog` it, and meansadapted t0 be mounted 'on each s ide of the door operable to move the pin to release the bolt.

6. A door latch comprising a cylindrical casing, a spring pressed bolt slidably disposed in said caslng, knob actuated means for operating said bolt, clogging means for fixing the position of the bolt, means adapted to be mounted on vone side ofthe door for setting and releasing said dogging means, and means adapted to be mounted on the oppqgitc side of the door for releasing said dogging means.

7. A door latch comprising a cylindrical casing, a spring pressed bolt slidably disposed in said casing, knob actuated means for operating said bolt, dogging means for fixing the position of the bolt, means adapted to be mounted on one side of the door for setting and releasing said dog ingmeans, and pivotally mounted means or releasing said flogging means andoperable from the opposite side of the door.

8. A door latch comprising al cylindrical casing a bolt slidably disposed in said casinv, a mob actuated shaft for operating said bolt and extending transversely thru said casing, a clogging pin for iixing the position of the bolt and disposed adjacent the shaft and parallel thereto, means adapted to be mounted on one exterior face of the door for setting and releasing said dogging means,

'and means adapted to ybe mounted on the opposite side of` the door for releasing saidY clogging means.

9. A door latch comprising a cylindrical casing, a bolt slidably disposed in said casing, a knob actuated shaft for operating said bolt and extending transversely thru said casing, a dogging pin for fixing the position of the bolt and disposed adjacent the shaft and parallel thereto, a housing surrounding the shaft and adapted to be mounted on one exterior face of thedoor, means Within the housing and having portions extending therefrom, for setting and releasing sa1d dogging means, and means adapted to be mounted on'the opposite side ofthe door for releasing said dogging means.

10. A door latch comprising a casing, al

spring pressed bolt slidably dis osed in said easing, a knob actuated shaft or operating said bolt, a dogging pin forfixing the position of the bolt, a plate mounted for pivl adapted for mountino- Withina door, a spring 10 'clogging means.

otal movement and operatively connected lto said dogging pin,- means for rocking said V plate to set or release the dogging pin and adapted for mounting on one side of the door, and means ada ted to be mounted on the opposite side o the door for releasingsaid 11. A door latch comprisingy a casing'v pressed latch bolt slidably mounted Within the casing and comprising a body portion and a vstrike plate engaging portion slidable relative to the body portion, knob actuated means orretracting the b-olt, a pin movable transversely of the bolt to dog it, means adapted to be mounted exterior to the door for movin the pin, and means actuated bythe -strike p ate engaging portion of the bolt for releasing the pin.

12. A door latch comprising a casing adapted to be mounted Within a door, a spring pressed latch bol't comprising a body portion slidable within the casing and a. strike late engaging portion slidable relative to the ody portion, means for retracting the bolt, means for clogging the boit,'and means actuatedfby the strike plateengaging portion for releas- I ing said flogging' means.

13. A door latch .comprlsing a casing adapted to be mounted within the door, a

sprmg pressed latch bolt slidably mounted y Within said casing,vmeans for retracting said bolt., a plate adapted to be mounted for movement on one side of the door, a pin carried by said plate for dogging they latch bolt, a housin surrounding the plate, and means extendmg from the housing for operating the plate.

In testimony whereof, I have hereunto set my hand.

oTTo P. CRAMER.

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