US1249710A - Lock. - Google Patents

Description

C. E. BIWLES.

, LOCK. APPLICATION man mm; 20. 1am

Patented Dee. 11,19171.

V C. E. BAYLES.

LOCK.

. APPLICAHON FILED JUNEZO. 191T- 1,249,710. Patented Dec. 11, 1917.

2 SHEETSSHEET 2.

cnaranns n. Barrens, or suntan lillAl-[tjt specification of Lctters Patent.

lt atentedliftecl 11, 171 117.

Application filed 1 1111620, L917. Serial No. 1'5,94;5.

To all whom it may concern:

Be it known that l, CHARLES E. lhxvnns, a citizen of the United States, residing at Bru'leyl in the county of Cassia and citate of Idaho, have invented certain new and useful Improvements in Locks, of which the following is a specification.

This invention has tor its object the provision of a simple and inexpensive door look so constructed that the latch bolt maybe set against release except upon the insertion of a proper key in the lock case. The invention designed more particularly for mortiso locks and seeksto provide a mortise lock which will require the torn'lation of only a single hole in the door. only, ho\v ever, he applied to looks hating separate latch and key bolts. The invention isillustrated in the accompanying nrawings and will be hereinafter fully described, thenovel features being subsequently particularly pointed out in the claims following the detailed description.

lln the annexed drawings:

lligure 1 is a vertical section of a portion of a door having my improved lock applied thereto, a portion of the lock casing being removed; a

Fig. 2 is a similar view showing the bolt set against release;

Fig. 3 is a longitudinal section on the line 3-3 of Fig. 1; p

at is a detail transverse section on the line l l of Fig. 1;

F ig. is a detail transverse section on the line 55 of Fig. 1;

Fig. 6 is a detail perspective viewvoi the hub and the parts cooperating immediately therewith.

The door 1 may be of any construction and in the same I bore a mortise, indicated at 2, for the reception of the lock case which is preferably circular in cross section so as to fit snugly in the mortise formed in the door and is retained in place by a lock plate 3 secured in the edge of the door and extend ing over the outer end of the lock case. The lock case is indicated by the numeral d and, as shown clearly in Figs. 4; and 5, is constructed of two members which when placed together will form a body circular in cross sectionand inclosing the bolt and the other operating parts. The line of division between the two members of thelock case may be located as may be deemed most advan tageous, the object oi forming the case in bled. within one of the lock case n'lelnbers and the other lock case member is then placed in position and secured by one or more screws or other tastenings 5 inserted through. the walls of the two members. The lock case is provided with suitable transverse openings to receive a hub 6 in which is fitted the knob spindle 7, said spindle being of the usual angular formation and equipped with knobs 8 so that it may be conveniently rocked and thereby actuate the hub, The belt 9 slidably fitted in the iron t and oi? the casing and is constructed with a projecting beveled tongue 10 which is adapted to enter a socket in the door fralneaud thereby hold the door in closed position. The bolt is provided witha longitudinal rib 11 onone side to engage a longitudinal groove 12 in the lock case and be thereby prevented from rotation, it. coiled spring 13 has one end seated in a socket 14l in the inner end of the bolt and its opposite endbearino' a ainst a ston 15 orovided o o l within the lock case, the said spring serving to hold the bolt normally projected and yielding readily to permit the bolt to clear the edge of the door frame or the keeper or look strike when the door is being closed. In one side of the bolt is nevidcd a recess l6,the walls oil which flare rearwardly and at the tront end of which 1s pivoted the front end of a link 17. This link 17 at its rear end carries a sleeve 18 in which is telescopically fitted thehead est a similar hook or link 19 which has its rear end pivotally engaged. in a socket 20 formed in one end oi? thehub 6. The telescopic connection of the links or hooks 17 and 19a permit them to slide relative to each other when the door is being closed and the bolt thereby pushed into the casing, but if the spindle be retated or rocked so as to release the bolt the consequent rocking of the hub 6 will ere ert apull through the hooks 19 and 17' upon the bolt to withdraw it from the keeper or the socketin the door frame, The head oi the link 19 will of course, be so proportioned as to prevent binding. To limit the rocking movement of the hub 6 an d thereby avoid bending or breaking or the hooks 1'? and 19, which would render the latch inoperative, l. recess or rabbet the end oi the hub, as shown at 21, concentrically with the llltl in the path of the depending lug 26.

spindle to receive a lug or projection 22 on the lock case. The rabbet 21 will permit the hub to move past the projection 22 when it is desired to release the bolt but the extent of such movement will be limited by an end wall of the rabbet coming in contact with the projection, as will be readily understood.

At one side, preferably the upper side, the hub 6 is provided with a flattened portion 23 and this flattened portion may extend entirely across the surface of the hub or it may extend only partway of the same transversely thereof, as may be preferred. A dead latch or wedging member 24; is slidably mounted in the lock case in rear of the hub and has its forward end 25 reduced and adapted to extend over the flattened surface 23 between the same and the lock case. The said dead latch is constructed with depending lugs or ribs 26 and 27 between which is a keyreceiving groove 28 and a key hole 29 is provided through the door and the lock case so that if a key be fitted therein and turned it will engage one or the other side wall of said groove 28 and also engage the roof of said groove so as to slightly lift the dead latch and also move the same longitudinally of the lock case. Spaced lugs 30 and 31 are provided in the lock case, the lug 8O sup porting the forward portion of the dead latch and also serving as a stop to limit the forward movement thereof by being disposed The lug 31 is disposed at such a point that when the dead latch is retracted, the said lug will be in advance of the depending lug 27 on the latch, as shown in Fig. 1, thereby tending to hold the dead latch in its retracted position. When a key is inserted and manipulated to set the dead latch, the latch will clear the lug 31 and ride over the same, dropping into engagement with the front side thereof when it has reached the proper position, as shown in Fig. 2. The lugs 27 and3l Will then tend to prevent accidental release of the dead latch and, to aid in the engagement of the lugs 27 and 31 and to hold the dead latch in proper engagement with the turning key, a spring 32 is secured in the lock case and has its free end playing in a longitudinal recess or groove 83 in the upper side of the dead latch, as shown and as will be readily understood.

It is thought the operation and advantages of my improved lock will be readily understood from what has been said. The spring 13 holds the bolt 9 normally projected and yields readily to movement imparted thereto by contact with the lock strike on the door frame or by rocking of the hub 6 through manipulation of the knob spindle. When it is desired to set the dead latch the door is closed and after the bolt has been engaged in the keeper, the proper key is inserted and turned to move the latch or wedge outwardly. The wing or ward of the key will thus be brought against the forward wall of the groove 28 and will lift the latch slightly so that it will clear the lug S1 and, as the movement of the key continues, will be pushed forward to the position shown in li 2 with its front end resting on the llattened surface 23 of the hub between the same and the top of the lock case. rotation of the knob spindle will thus be prevented and the door can then be opened only by the insertion of the key and the movement of the san'ie in the opposite direction. When the 7 moved in the opposite direction, it will li it the dead latch so that it will cl *ar the leg 31 and then move rearward over the same, dropping into engagement behind it when it has cleared the hub.

The device is exceedingly simple in the construction and arrangement of its parts and may, therefore, be produced at a very low cost. t may be readily applied to a door in a few minutes and will be found highly eliicient for the purposes for which it is designed.

Having thus described the invention, what is claimed as new is:

1. Ina lock, the combination of a lock case a bolt slidably mounted therein and provided in one side with a recess havingrearwardly diverging walls, means for holding the bolt normally projected, a hub rotatably mounted in the lock case, a link having its outer end pivoted to the bolt at the apex of the recess therein, and a second link having its inner end pivoted to an end of the hub and its outer end telescopically fitted to the inner end of the first-mentimied link.

2. In a lock, the combination of a lock case, a bolt slidably mounted in the case, a hub rotatably mounted in the case and opcratively connected with the bolt, a stop member disposed transversely in the case in rear of the hub, a lateral projection on one side of the case near the rear end thereof, and a dead latch movable into engagement between the hub and the case to prevent rotation of the hub and having depending lugs, one of said lu s engaging the transverse stop to limit the forward movement of the latch and the other of said lugs arranged to engage the said lateral projection and hold the latch in either of its set positions.

In testimony whereof I allix my signature.

(ev is CHARLES E. BLYLES. [1.8.]

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 8.

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