US1781813A

US1781813A - Lock device

Info

Publication number: US1781813A
Authority: US
Inventors: Selden J Goodwin
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-09-17
Filing date: 1928-09-17
Publication date: 1930-11-18
Anticipated expiration: 1947-11-18

Description

l at'ented Nov. 18, f

SELLDEN 'J. eoonwnv, or" shN rmncrsco, OALIFORN1A, I 3

LOCK nEvrcE,

Application men September i7, "i928. sermrm, '3oe,3s3.*

'This invention relates todoor locksof the.

spring latch bolt type and hasfor its objects the provision of guard'means whereby the bolt cannot be opened by an unauthorized person through the use of a thin tool or sheet of material to force back. the bolt.

Briefly described my invention comprises applying to the bolt socket of a a common striker plate an automatically projecting guard of sheet metal so arranged that the bolt is inaccessible from thefront of the door as well as from above and below the.

bolt. In the drawings accompanying this applistriker plate as used on the jamb of a door to receive the latch bolt.

Fig. 2 is a plan view of my'guard which plate of Fig. 1. r v a Fig. 3 is an end view of .the'device of Fig. 2. e V

Fig. 4 is a bottom view of the device of Fig. 2. V i Fig. 5 is a perspect've view of the inner or adjustable member of the device shown in Figs. 2, 3 and 4.

Fig. 6 is an elevation of the plateof Fig.

1 fitted to a door j amb and with my device in position within the socket in the jamb and late. p Fig.7 is a cross sectionof a bolted door and jamb taken at a point just above the latch bolt of the door lock, with my invention in place and showing the relationof my guard to'the door and jamb.

In-the common method of installing springv locks in doors, a bolt or striker plate lis counof the lock merely snaps into place in the socket 3 of the plate.

The door 4 (Fig. 7) is supposed to close against a stop piece usually a, separate strip 5 nailed to the jamb 2, but in practice there is "nearly always an appreciable crack or clearanceas at 6, and also at 7 between the side of the door and the jamb, and it is by reason of this that an unscrupulous person'can easily open a spring bolted door of this type, as the "bolt 8 of the lock 9 has a beveled-face at8' cation Fig. 1 is an elevation of a common is adapted to fit within the socket of the 7,

vertical edge'of the socket'3 of the common strikerpl'ate'land preferably adjustable in or x outf-of thejamb so that-its vertical-lw'all may:

tersunk into the jamb 2 of a door and the bolt and-if a sheet of celluloid'or the likeis pushedboltand force same back into the look so that the door may be opened. Or insteadof the celluloid-'a' thin blade may lie-forced between;

- intotheZclearancefGit will follow over into I the clearance 7, reach the beveledface of-the j e V the stop 5 and j amb'2 along thej oint 10 :until Y it reaches andfforces downthebolt.

Prior attempts made'toovercome/this weakness insprlng'locks became concentrated,

on" blocking the passage of an instrument thro'ugh the joint 10 but have not considered the passageflmost always present at 6, nor have prior' devices guarded the lat'ch 'from 'ac-" V ces'sibility ataslant from a'boveor below. 'My-invention comprises a sheet metal guard consisting of an inner member 11 adapted 'to' be'positionedwithin' and forming an outwardly projecting wall attop, bottom-and one' I be made to just touch the face of the lock 9 when the door is closedasindicatedat 11 inFig .7. i

The adjustability of member 11 may be effected-in various ways but is here shown ace complished by pivoting the inner member at 7 12 to small ears 13 extending from 'a plate or frame 14 which, when in place on the jamb, is

' let into the wood flush with theundersideo'f the striker' plate andextendingbeyond the hole 15 cut in the wood for the bolt to prodrilled through plate 1 just over the screw 17*soth'at it 'canbe reached- -with out: removing plate '1. End wallsll on the inner 'member also project outwardly to the lock above and belowthe bolt." i

With the arrangement described the latch bolt'is i-guarded from accessibility from its beveled side as well as top and bottomb'y a metal wall projecting at right angles'from the striker plate and substantially in contact with the metal mortised face of the'lock itself, thus rendering the bolt proof against tampering by insertion of tools through

passages

6, 7 or 10, or evenif stop piece 5 was forcibly ripped off by one seeking to open the bolt.

From the abovedisclosure it will be manifest that walls like 11 and 11; integrally} formed with striker plate 1 and projecting from the edge of its bolt opening or socket '3 will also form a-}gnard-asdesired tl'iougli they would not be adjustable to care ,for

shrinkage of doors and jambs as does the' complete arrangement shown ain the; draw ings, and therefore any such modifications as co'mezwithin the spirit of the'invention are intended to be embraced in the appended claims. V

I claim:

1. In combination with adoor-lock having provided with a wall projecting through said opening, and means whereby said device may be adjusted relative to said frame and plate to vary the projection of said wall from the face of said plate.

a 6. In a structure as specified in claim 5, said wall'extending along one edge of said opening and fora distance along its two ends.

7 A striker plate having an opening to re- 7 provided with a wall projecting through said opening, said device being pivotally mounted on said frame, and a screw connecting the "frame an'd'de'vice arranged and-adapted for adjustingithe frame and device from the jpivotalmounting. I

, a f 8mm"; eoobwm ceive the latch bolt of a lock, a frame positione'd under-said plate,' a bolt guard device said Wallextending along one vertical edge of saidopening adjacent-the beveled side of the bolt. a

.2. In combination with adoor lock having its outer face in one plane, a spring bevelsided bolt adapted to engage the edge of an opening in ajstriker plate, arigid wall projecting outwardly fromsaid striker plate guarding the bolt when engaged with the plate of aheight to take up the normal clearance between lock and plate when the door is hung and substantially touching the face of the lock exposed at the edge of the door,

7 said wall extending along one vertical edge I of said opening pastthe beveledside of the bolt and for a distance along the upper and lower edges ofsaid opening.

3. In combination with a door lock having a spring bevel-sided bolt adapted to engage the edge of an opening in a striker plate, a

rigid wall projecting outwardly from .said

striker plate guarding the bolt when engaged with-the plate, andmeans whereby said wall is adjustable in its projection from said plate adapting the wall to be brought into contact vwith the face of the lock exposed at the edge of the door when the bolt and plate are, en-' gaged. I ff. A striker plate having an opening to receive the latch bolt of a look, a device under said, plate provided with a wall projecting outwardly through said opening extending along one side and both ends thereof. v 5. A striker platehaving an opening to re-. ceivejthe latch bolt of alock, a frame positioned under said plate, a bolt guard device v nc