US2091930A - Lock - Google Patents

Description

. LEDlN Apg. 31, 1937.

Filed Marc'h s1, v195e 2 sheets-sheet 1 Augl 31, 1937.

C. LEDIN LOCK vFiled March 31, 1936 2 sheds-sheet 2 mi ri INVENTOR TTORNEY Patented Aug. `31, 1937 UNITED STATES LOCK* Charles Ledin, Stamford, Conn., assignor to The Yale & Towne Manufacturing Company, Stamford, Conn., a corporation of Connecticut Application March 31, 1936, Serial No. 71,856

. 12 Claims.

This invention relates to a lock of the rim type in which a considerable portion oi the lock is adapted to be housed in an open mortised portion of the door.

Those skilled in the art will readily appreciate that rim locks are usually housed in a casing maintained entirely on the outside face of one side of a door and operable either by a knob extending from the casing, or by a cylinder located on the other side of the door and having a tongue or connecting bar extending into the lock casing.

Such rim locks are usually quite unsightly but have an advantage in that they are relatively simple to install. My invention relates to a lock similar to the type just described, but in which about half the casing is adapted to be maintained within an open mortised portion or recess in the door, so that only a small part of the casing projects beyond the face of the door. This gives a very pleasing effect, and because of my particular construction, which will be described later on, I am able to obtain this effect without complicating the method of applying the lock to a door.

Before describing in detail the features of my invention, it may be 4well to indicate generally its construction and method of operation. The lock comprises a base plate which is in effect a lock casing adapted to occupy a recess or open mortised portion of the door. This base plate, or lower .casing as it may also be termed, has a series of lugs which rest on the surface of the door surrounding the recess, and which limit the insertion of the base plate into the recess or open mortised portion. Preferably, screws are adapted to enter the bottom surface of the base plate to secure the same to the bottom surface of the open mortised portion, and the degree of movement of the base plate into the open mortised portion under the influence of these screws is, of course, determined by the lugs resting against the face of the door.

The outer casing portion of my lock is formed decoratively, and it holds in position the bolt and a cam for retracting the bolt. The bolt and cam are mounted on this casing portion, but eX- tend beyond it so as to lie partially, at least, in the open mortised portion of the door. This outer casing has a peripheral edge portion adapted to lie just outside the open mortised portion of the door or recess,` so as to entirely hide that recess and to give a very pleasing effect. The outer casing is preferably equipped at its rear end with a lug adapted to interlock with (Cl. Y0-151) an upstanding ear on the base plate at the rear of the base plate. At its front end, the casing has an end surface adapted to lie in the plane of the end face of the door and arranged to be secured by screws, preferably, to upstanding ears at the front end of the base plate.

The construction of the lug at the rear ofthe outer casing, and the perforated ear on the base plate, is such that when the screws at the front end are tightened, cooperating cam surfaces on the lugs and the perforated ear of the base plate will cause the casing and base plate todraw together laterally as well as endwise, to move the casing tightly against the surface of the door, and thus give a very pleasing appearance to the lock.

yMy invention comprises further details which are of course important, but which will be described in detail hereinafter in connection with the drawings, wherein a preferred embodiment of my invention is shown.

In the drawings, Fig". 1 is a View of the outer casing of. my lock and the strike cooperable therewith. Fig. 2 is a section through the lock and strike, showing the construction of the parts. Fig. 3 is a View substantially along section lines 3,- -3 of Figf2. Fig. 4 is an end view of Fig. 3, looking at it from the left. Figs. 5, 6 and 7 are different views of the construction of the bolt and the bolt retracting means, and the outer casing portion.

Referring now more particularly to the drawings, it will be noted that there is a door I0 having an open mortised portion, or recess Il, in which is adapted `to lie the base plate or lower casingpo-rtion I2. This base plate I2 has an upstanding ear I3, which is perforated at I4 for a purpose which will be explained presently. The base plate has also a series of upstanding lugs I5 bent over at I6 and cooperable with, the edge of the door l0 surrounding the recess or open mortised portion II. .A pair of screws I'I traverse perforated portions of the lbase plate, as is best seen in Figs. 2 and 3, and thus secure the base plate in the recess at a depth determined by the portions I6. The base plate I2 is further secured relatively to the recess Il by screws I8 lying between the base plate and lugs I9 formed on a cylinder lock 20, which cylinder lock is adapted to operate the lockingv mechanism through af connecting bar 2| in a manner well understood in the art. The method of securing the base plate in the recess may be modified readily, the main feature of the construction lli being the means determining the position of the base plate relatively to the face of the door.

The outer casing is designated by reference numeral 22 and has mounted thereon a bolt retracting knob 23 having xed thereto a cam 24 bearing pin 25 which acts to retract the bolt, as will be explained later, when the knob 23 is rotated.

The outer casing has a peripheral edge portion 26 adapted to lie just outside the recess II and to lit againstthe face of the door surrounding the recess, 'as is best seen from Figs. 2 and 3. A lug 21 extends from the casing at its inner end and is adapted to rest within the perforation I4 of the upstanding ear I3 of the base plate for interlocking with the base plate, as will be readily understood.

At the front end of the outer casing, there is formed an end surface 28 perforated at 29 for a pair of screws 30 which are adapted to enter threaded upstanding ears 3| in the basel plate I2. It will be readily appreciated that when the screws 311 are rotated to their extreme position, they act to` draw the base plate and casing together endwise. Because the lug 21. has a cam surface 21a. cooperable with the perforation I4 of ear I3, the relative endwise movement of the casing and plate caused by the turning of the screws 36 acts to cam the outer casing and base plate together, and to force the peripheral edge 26. of the outer casing rmly against the face of the door or to. any slight preferred spacing away from the door. All this adjustment and securing of the outer casing is, of course, controlled by the securing screws for the base plate, and the locating lugs I6 of the said base plate.

The outer casing 22 carries the bolt of my lock, designated by reference numeral. 35. The bolt has anintegral tail portion 36 and a central. spring supporting rod-.like portion 31., on which is mounted a spring 38 maintained between the rear surface 39: of the bolt and a washer 40 backed up by a perforated upstanding lug 4I through which the. portion 31v traverses when the bolt is retracted, while the spring is compressed against tl'lewasher 40. The cam- 24- of knob 23, through the pin 25 previously described, is adapted to retract the. bolt by cooperation with surfaces 42 and 43 of the tail portion 36of the bolt. The bolt is reversible for right and left hand doors, and, therefore, is madevsymmetri cali with one of the surfaces 42, 43 available to the pin. 25 regardless of the particular hand of thelock assembly.

Whilenormally the pin 25 is adapted to rest against the portion 42l of the tail of the bolt in the assembly illustrated, it is possible to rotate the cam from the position of Fig. to the position-,of Fig. 6 so as to .permit the bolt to be thrown an extra amount by the spring, as iseasily seen by referenceto Figs. 5 and 6. In theposition of Fig. 6 also, the bolt 35 is deadlocked because of the position-of thevpin 25 opposite the surface 44 of the latch bolt tail, the pin 25being in a dead center position so as to obstruct rearward movement of the bolt 35.

For maintaining the bolt 35-in a retracted position, best illustrated in Fig. 7, Iuse a thumb p iece 45, shown in Figs. 1 and 2, maintained for sliding movement relatively to a slot 46. of the casing22, Secured to the member 45 is a slide piece 41 having a spring portion 48 cooperable with a lip 49 on the casing to maintain the slide piece 4-1 in its position of Fig. 6, or in its position ofl Fig. 7.

In its position of Fig. '7, the slide piece 4l is so located that the right hand end of an angular lug 50 thereon cooperates with a lug 5I on the upper side of the bolt for maintaining the bolt against outward movement so that the bolt is retained in its position of Fig. 7. The angular position of the lug 50 is adapted to prevent the lug and the member 4l from obstructing the rearward movement of the bolt from the position of Fig. 6 to the position of Fig. 7, since the angular surface will permit the member 4l to be cammed upwardly by the rear of the lug 5I. As was already indicated, the bolt 35 is made symmetrical so that it is reversible and thus has two lugs 5I in addition to the two portions 42 and 43 on the bolt tail already described.

I provide stop lugs 35a, on the outer casing portion 22 which limit the retractive movement of the bolt 35. I also provide a struck-up lug 24ay on the cam 24 cooperable with a lug 22a for limiting the rotation of the cam 22. For cooperation with the bolt 35, I utilize a strike 52 shown only in Fig, 2, this strike being of the usual form well known in the art, except that it is designed for particular cooperation with the locking mecha- Ilism of the main portion of my lock.

For operating the cam pin 25 from the outside of the door, as I have already indicated, I provide a cylinder lock 20 equipped with a connecting bar 2I which may be rotated in a manner well understood in the art. A cam 53 is mounted for rotation on the plate I2 and is perforated at 54r for the entry of the connecting bar 2|. 'I'he cam 53 also carries a pair of arms 55 which cooperate with the pin 25, as best illustrated inV Fig. 2. It is easily seen that rotation of the connecting bar 2I by the cylinder lock 20 will retract the bolt through coaction of one of the arms 55 with the pin 25. I believev that the operation of my invention will now be quite clear to those skilled inthe art.

I` now claim:

1. In a lock of the class described. a base plate having a depressed portion adapted toI occupy an open mortised portion in a door and having also offset portions adapted to overlie the surfacefof the door about said open mortised portion, fastening screws securing said baseplate to said door, a casing havinga peripheral outlining portion adapted to lie with its edge-juxtaposed relatively tothe surface of the door about the edge of said open mortised portion while covering said portion, lock mechanism carried by said casing and fitting into the depressed portion of said base plate lying in the open mortised: portion ofthe door, and screws for joining said casing to the said base plateand thereby assembling the lock on said door.

2. In a lock of the class described, a base plate having a depressed portion adapted tooccupy an open mortised portion in a door and having also onset-portions adapted to-overlie the surface of the door about saidopen mortised portion, fastening screws securing said plate tothe door, screw threaded lugs at one end ofV said base plate and upstanding therefrom, a perforated ear at the other end of said base plate and upstanding therefrom, a casing having a peripheralI outlining portion adapted to lie with its edge against the surface of the door about the edge of said open mortised portion while covering said portion, lock mechanism carried by said casing and fitting into the depressed portion of said base plate lying inthe open Amortised'portion of the door, an outer end surface of said casing adapted to be aligned with the edge of the door, a hook formed near the inner end of said casing and on the inside surface thereof and extending beyond the peripheral outlining portion thereof, said hook being adapted for engagement with the perforated lug of said base plate, and screws for joining the outer end surface of said casing with the screw threaded lugs on said bas'e plate.

3. In a lock of the class described, a base plate adapted to occupy an open mortised portion in a door, offset portions on said base plate overlying the surface of the door about the edge of said open mortised portion and determining the depth of insertion of the base plate into said open mortised portion, fastening screws securing said base plate to the bottom surface of said open mortised portion, screw threaded lugs at one end of said base plate and upstanding therefrom, a casing having a peripheral outlining portion adapted to lie with its edge against the surface of the door about the edge of said open mortised portion While covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, and screws for joining the outer end surface of said casing with the screw threaded lugs on said base plate.

4. In a lock of the class described, a base plate adapted to occupy an open mortised portion in a door, offset portions on said base plate overlying the surface of the door about the edge of said open mortised portion and limiting the depth of insertion of the base plate into said open mortised portion, fastening screws securing said base platerelatively to the bottom surface of said open mortised portion, screw threaded lugs at one end of said base plate and upstanding therefrom, a perforated ear at the other end of said base plate and upstanding therefrom, a casing having a peripheral outlining portion adapted to lie with its edge against the surface of the door about the edge of lsaid open mortised portion while covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, a hook formed near the inner end of said casing and on the inside surface thereof and extending beyond the peripheral outlining portion thereof, said hook being adapted for engagement with the perforated lug of said base plate, and screws for joining the outer end surface of said casing with the screw threaded lugs on said base plate.

5. In a lock of the class described, a base plate adapted to occupy an open mortised portion in a door, offset shoulders on said base plate overlying the surface of the door about the edge of said open mortised portion and limiting the depth of insertion of the base plate into said open mortised portion, fastening screws securing said base plate relatively to the bottom surface of said open mortised portion, screw threaded lugs at one end of said base plate and upstanding therefrom, a perforated ear at the other end of said base plate and upstanding therefrom, a casing having a peripheral outlining portion adapted to lie with its edge against the surface of the door about the edge of said open mortised portion while covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, a hook formed near the inner end of said vcasing and on the inside surface thereof and extending beyond the peripheral outlining portion thereof, said hook having a cam surface for engagement with the perforated lug of said base plate, and screws for joining the outer end surface of said casing with the lugs on said base plate for drawing said casing endwise relatively to said plate whereby through the cam surface on the hook to draw said plate and casing together laterally as well as endwise.

6. In a lock of the class described, a base plate adapted to occupy an open mortised portion in ,a door, offset shoulders on said base plate overlying the surface of the door about thel edge of said open mortised portion and limiting the depth of insertion of the base plate into said open mortised portion, fastening screws securing said base plate relatively to the bottom surface of said open mortised portion, an open casing having a peripheral outlining portion adapted to lie with its edge against the surface of the door about the edge of said open mortised portion while covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, screws for joining the outer kend surface of said casing with said base plate, a bolt retracting cam on said base plate, a cylinder lock secured to said base plate, and a tongue on said cylinder lock engaging said cam.

7. In a lock of the class described, a base plate adapted to occupy an open mortised portion in a door, offset shoulders on said base plate overlying the surface of the door about the edge of said open mortised portion and limiting the depth of insertion of the base plate into said open mortised portion, fastening screws securing said base plate relatively to said open mortised portion, a casing having a peripheral outlining portion adapted to lie with its edge against the sur-- face of the door about the edge of said open mortised portion while covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, screws for joining the outer end surface of said casing with the said base plate, a bolt retracting cam on said base plate, a bolt and bolt retracting mechanism carried by said casing, said bolt retracting mechanism being operable by said base plate cam when said casing is joined to said base plate.

8. In a lock of the class described, a base plate adapted to occupy an open mortised portion in a door, offset shoulders on said base plate overlying the surface of the door about the edge of said open mortised portion and limiting the depth of insertion of said base plate into said open mortised portion, fastening screws securing said base plate relatively to said open mortised portion, screw threaded lugs at one end of said base plate, a casing having a peripheral outlining portion adapted to lie with its edge gainst the surface of the door about the edge of said open mortised portion While covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, screws for joining the outer end surface of said casing to the lugs on said base plate, a bolt retracting cam on said base plate, a bolt and bolt retracting mechanism carried by said casing and extending therefrom beyond the plane of the edge of its peripheral outlining portion and therefore into said open mortised portion of the door, said bolt retracting mechanism being operable by said base plate cam when said casing is joined to said base plate.

9; In a lock of the class described, a base plate adapted to occupy an open mortised portion in a door, offset shoulders on said base plate overlying the surface of the door about the edge of said open mortised portion and limiting the depth of insertion of the base plate into said open mortised portion, fastening screws securing said base plate to said open mortised portion, screw threaded lugs at one end of said base plate, a perforated ear at the other end of said base plate and upstanding therefrom, a casing having a peripheral outlining portion adapted to lie with its edge against the surface of the door about the edge of said open mortised portion while covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, a hook formed near the inner end of said casing and on. the inside surface thereof and extending beyond the peripheral outlining portion thereof, said hook having a cam surface for engagement with the perforated lug of said base plate, and screws for joining the outer end surface of said casing with the lugs on said base plate for drawing said casing endwise relatively to said plate whereby through the cam surface on, the hook to draw said plate and casing together laterally as well as endwise.

10. In a lock of the class described, a base plate adapted to occupy an open mortised portion in a door, offset shoulders on said base plate overlying the surface of the door about the edge of said open mortised portion and limiting the depth of insertion of the base plate into said open mortised portion, fastening screws securing one end of said base plate relatively to said open mortised portion, a lock cylinder against the surface of the door opposite said base plate, screws between said cylinder and base plate for securing the other end of said base plate relatively to said cylinder and therefore to said open mortised portion, screw threaded lugs at one end of said base plate and upstanding therefrom, a casing having a peripheral outlining portion adapted to lie with its edge against the surface of the door about the edge of said open mortised portion while covering said portion, an outer end surface of said casing adapted to be aligned with the edge of the door, and screws for joining the outer end surface of said casing with the lugs on said base plate.

11. In a lock of the class described, a base plate having a depressed portion adapted to occupy an open mortised portion in a door, and having also offset portions adapted to overlie the surface of the door about said open mortised portion, fastening screws securing said base plate to said door, a casing having a peripheral outlining portion adapted to lie with its edge juxtaposed relatively to the surface of the door about the edge of said open mortised portion while covering said portion, lock mechanism carried by said casing and fitting into the depressed portion of said base plate lying in the open mortised portion of the door, and screws for joining said casing to the said base plate.

12. In a lock of the class described, a base plate having a depressed portion adapted to occupy an open mortised portion in a door, and having also offset portions adapted to overlie the surface of the door about said open mortised portion, fastening screws securing said base plate to said door, a casing having a peripheral outlining portion adapted to lie with its edge juxtaposed relatively to the surface of the door about the edge of said open mortised portion while covering said portion, and screws for joining said casing to the said base plate.

CHARLES LEDIN.

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