US1628354A - Combined lock and latch - Google Patents

Description

I .1, 2 May 10,1921. a CAWTHRON 6 8,354

COMBINED LOCK AND LATCH Filed March 9, 1926 3 Sheets-Sheet 1 Inventor 6'. '4 cot/0'02,

Attorney May 10, 1927. 1,628,354

G. CAWTHRON COMBINED LOCK AND LATCH Filed. March 9, 1926 5 Sheets-Sheet 2 I nventbr 6. 'awirarp;

' max/ Attorney G. CAWTHRON COMBINED LOCK AND LATCH May 10 1927.

s She'etS-Sheet3 Filed March 9, l926- I Inventor 6'. 6 42067270! Attorney Patented May 10, 1927.

lai28,354

PAT N oFs cE.

1 GEORGE oawrnnon, or runnwoonorry, CALIFORNIA.

COMBINED LOCK AND LATCH.

Application filed March 9; 1926. Serial no. 93,481.

This invention relates to .a combined lock and'latch, particularly adaptedfor installation within swinging doors,and has for its primary object to provide means whereby the latch bolt may be' readily secured in projected position within its door iran'ie keeper 7 I for thus overcoming the necessity of providing a separate lock bolt for the'lock mech anism. e

A further object is to provide a combined lock and latch of this character wherein afterthelatch bolt has been locked in said projected position, it will be practically im possible for the lock to be picked or the bolt bility of disarrangement to a minimum'and to facilitate the retraction of the latch bolt through reason ofthe usual hand knob, and also to facilitate the ready locking oi the latchbolt. when in projected position.

Other objects will become apparent as the nature of the invention will become better understood, the same comprising the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings, and claimed.

In the drawings wherein like reference characters indicate corresponding parts throughout the various views Figure 1 is a tlragmentary outside elevationof a conventional swinging door that is equipped with my improved combined lock and latch, certain portions of which are brokenaway, while parts thereof are disposed in crosssection for purposes of clearness,

Fig.2 is a similar View of the mechanism, the door plate and casing cov'erplate thereot being. removed, while the door is also partly disposed in section for more clearly illustrating the construction of the mechanism, I

Fig.3 is a view somewhat similar to Fi 2, the various elements thereof being however'disclosed in latch bolt locking condition,

drawin r the provision of a metallic casing 0 Fig. i is a detail verticalsection through the door and combined lock and latch,

Fig. 5 is' a fragmentary horizontal section therethrough Fig. 6 is a fragmentary. section through the upper end of themechanism, certain ele-' ments or construction being removed for more clearly disclosing the inner end construction ot thesliding latch bolt,

.Fig. 7 is a fragmentary vertical transverse section through the center portion of the mechanism for more clearly disclosing the construction of the latch bolt locking member per se, 7 r

Fig. 8 is a sectional view taken through the knob control latchbolt releasing element per se, 7 I Fig. 9 an inner side elevation of the inner end of the latch bolt, and

Fig. 10 is an inner side elevation of the keeper plate of the combined "latch bolt.

Now havingparticular reference to the my novel mechanism constitutes that is so constructed as to provide three interconnecting circular portions as clearly disclosed in Figs. 1, 2 and The door A is suitably mortised or pocketed adjacent the free edge thereof to receive this casing while leading from said mortise or the pocket at the upper edge thereof in a direction toward the free edge of the door is a channel 6 through which the latch bolt of the device freely moves. The outer end of this channel is equipped with the usual metallic guide plate 7 that is formed, with an opening in its center to permit the head of the bolt to slice inwardly and outwardly thereof.

At the sides ot' the two lowermost circular sections ot'the casing 5 are outwardly projecting flanges '8, the flanges of the lowermost circular section connecting as clearly shown in Figs 2 and 3. These flanges which effect the side walls of the casing facilitate the positioning of the same within the door mortise or pockets, and also properly support the casing when disposed therein. The uppermost circular portion of the casing is unfianged at its sides, but is at its upper edge formed with a circular flange 9 serving for the same purpose as the flanges oi? the circular portion.

Extending longitudinally across the outer face of the uppermost circular portion of the casing 5 are spaced parallel ribs 1 11,- l

serving as a guide for the inner end of the lateh liolt which is designated in its entirety by the character 12, the inner end of which is in the form of a rectangular shaped plate 13 mounted tor tree sliding nloveinent be tween said ribs ll--ll while the outer end thereoi' is in the term of a conventional head l t slidable through the opening in the channel closing plate 7, said head and said plate letand ill respectively being adj nstably iln'ereonnceteil through inediuin o-t a bolt to that is carried by said head and that is threaded at its inner end tor threaded engageuienl within a threaded opening in the adjacent end ot said plate as more clearly shown in Fig. 5.

The center of the rasing rt the upper rirenlar portion thereot termed with an opening it Fig. 3. for a purpose hereinatter niore tully described. and projecting laterally inwardly llUlll the ribs lfl-ll at diametrieallzv opposed sides of said opening, lugs l'i' lT, Figs -land ti. The under side ot' the plate 125 of the latch bolt 12 is so constructed as to provide longitudinal sock-- ets l8lti at opposite edges thereof and adjacent the outer end ot the plate tor the reception of the inner ends oi expansible coiled springs lllt the outer ends ot which are adapted to engage said lugs 17 l? to normally itoi'ce the latch bolt outwardly to theposition shown in Figs. 1, .2, and 6, said springs however, permitting oil the tree inward sliding movement ol said latch bolt when the same strikes the usual keeper in the door jainb, not shown.

The plate 13 ot said latch bolt 12 is tun ther torinetil with an elongated opening :20 at its inner end, the same being at all times in Ft ;;tration with the opening it; in said casing and through which opening is removably disposed a sleeve 21. the interior o't which is square shaped l'or receiving the knob eontrol shalt or spindle 22 that projeels through the opposite sides oi the door and is adapted tor rereiving the ronventionat knobs. here not shown.

"lhe 'torward end oi this i-ileeve 31 is also of square shape externally. and upon which is to be arranged a eireiillar plate 2 3, that consists oi a pair oit spaeed disks 2-l-2l interconnected at their periineters through me dium ot' rivet pins :25. Coiled between the disks around the squared registering openings in the center thereof is a length of spring wire 20, the ends ot which are projected outwardly thereojt upon opposite sides ot one ot the ronnectiug rivets as clearly shown in llig. h. 'll'iese ends of the wire are adapted to engage along opposite sides ot' a rib 2T 'lorrned upon the inner side of an outwardly projecting internally threaded sleeve 2% that is termed integrally with the casinga directly beneath the upper edge of the central circular section of the casing as clearly shown in Figs. 2, 3, t and (S.

The annular member 23 serves as a supporting bearing for the sleeve 21, while the spring 26 serves as a means for returning the shaft 532 and said nien'iber 23 to the position disclosed in Figs. 1, 2, 3, t, 5 and G at which position the latch bolt 12 in its outwardly projected state.

At the inner end ot the latch boltplate lit at opposite sides ot the opening 20 therein are lugs 29--2tl. the inner edges ol? which are adapted to he engaged by the opposite ends oi? a win -shaptal plate tit) .tOlIlltlt'tllPOh the opposite side (it the shat! receiving sleeve :Zi in order that when said shal't is turned in opposite directions. iither end oil? said plate will engage against the respective lugs 'ior retracting the latch bolt against the noiion ot the springs 1%)19.

itt opposite sides oil the center of the middle circular portion of the casing 5 are pins Si -L the inner opposed side ends ol which are rabbeted for receiving the opposite edges ot a s-:(11iai'(i-sl1zipe :l sliding plate it: that is termed at one end and at its upper edge with a vertically extending linger 33, that will engage the back of the adjacent end of latch bolt plate l3 when said bolt is projected and when said plateis slid opt ardly between the pins 3131 in a inanner hereinatter more tally ClQSCITllLK-Btl tor obviously locking the latch bolt in its projeeted position.

The opposite sides of the finger 33-4-32. are termed with lateral bearing blocks Sits-34 the inner one of which rests upon the easing 5 while the eover plate tor the casing hereinafter more fully described ongages against the outer one of the blocks as clearly shown in Fig 2-, said blocks servh'ig io assist the pins 31Z:ll in the n'oper sup port of the plate 32. The inner block on both of the blocks are formed at their up per ends with sockets 35 the socket in the block adjacent the casing 5 ada 'ited to receive one endo't an expansihle coiled spring it, the opposite end thereof nojeeting against the lowermost rib il'l. hereinbetore deseriliied, said spring normally serving to maintain the plate in the position shown in Fig. thus .ierinitting ott lle retraction of the bolt when the head 14 thereof strikes the keeper in the door frame or under action of the knob control shaft or spindle 22.

The plate 32 is formed with an opening 37, the upper edge of which is notched at :38 intermediate its ends while the opposite ends of the opening at the upper edge thereof are so formed as to provide pin receiving and retaining notches B ):l9. Pivoted to the casing 5 (:lireetly beneath the previously mentioned sleeve 28 is the upper end of a swinging latch plate 10, the lower edge of Ill III]

which is widened and notched intermediate its edges for providing a pair of fingers 41-41. Upon the outer side of said plate and adjacent the edge thereof next to the finger carrying edge of the ,plate 32, is an outwardly projecting pin 42 that is adapted to engage within the notch 39 beneath the finger 33 of the plate 32 when said plate has been forced upwardly, and the latch plate swung into the position shown .in Fig. 3 for maintaining the fingers 33 of said plate 32 in an upward position in back of the latch bolt 13 for retaining said latch bolt in projected position.

At this point, it may be well to state that the reason forthe sockets in the bearing block of the finger carrying plate 32 and the provision of the notches 39-39 at opposite sides of the opening 37 in said plate is to permit this plate to be disposed reversely within the casing 5 should it be necessary to dispose the mechanism in the opposite side of the door A from that shown in the figure, such a reversal of position ob-,

viously necessitating the reversal of the other elements of construction such as the latch bolt 12, sleeve 21, etc., etc.

The lower circular section of the casing 5 is formed centrally with a T-slot 43 within which is adapted to be inserted a properly formed key 44, the head of which is so con struct-ed as to first engage the lower edge of the finger carrying plate 32 when the same is turned .in the opening for obviously raising said plate, and then engaging the finger 41 of the latch plate 40 beneath the pin 42 for swinging said latch plate upon its pivot to engage said pin 42 within the adjacent end notch of the plate opening 37.

After the lock has been assembled in the door in a manner as heretofore described and as shown in the drawing, a casing cover plate 4-5 is disposed thereover, the same being shaped complementary to the casing and secured thereto by reason of a locking screw 46 that passes through an opening in the cover plate, which when positioned will register with the sleeve 28 that receives the threaded shank of the screw in a manner as clearly disclosed in Fig. 4:. Upon opposite faces of the door are the usual ornamental lock cover plates 4747,

It will be readily understood by reviewing the accompanying drawing and by perusing the foregoing specification, that I have provided a highly novel, simple, and

.el'licient form of combined lock and latch' mechanism that is well adapted for all of the purposes designated, and even though I have shown and described the mechanism as including certain detail structural elements, it is nevertheless to be understood thatjdepartures may be had without efiecting the spirit and scope of the appended claim. r

spindles, a spring coiled'about the spindle and confined between the spaced members, a pm projecting laterally from the casing, the free ends of the spring extending on opposite sides of the pin in engagement therewith. I i

In testimony whereof I afiix my signature.

GEORGE OAWTHRON,

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