US1626432A - Strike plate - Google Patents

Description

J. H. SHAW STRIKE} PLATE Original Filed Aug. 29. 1923 Patented Apr. 26, 1927.

JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T0 SARGENT & COMPANY,

OF NEW 'HAVEN, CONNECTICUT.

STRIKE PLATE.

Original application filed. August 29, 1923, Serial No. 659,956. Divided and this application filed April 8,

This invention relates to strike plates, and more particularly'to strike plate designed to be placed in the threshold or floor below the. door, in connection with which it is to be used, to receive a lock bolt which is adapted to be projected downwardly from the door. lVhile the plate is'shown in connection with an emergency exit lock having a pivoted bolt designed to roll or swing pivotally to protracted position, it will be understood that it may be used with other types of looks as well, including those having the ordinary reciprocable dead bolt, although in some aspects of the invention it is particularly useful in connection with a bolt of the type shown, designed to swing or roll to retracted or protracted positions. The present application is a divisionof my prior application, Serial No. 659,956, filed August29, 1923.

In connection with strike plates which-are mounted in the threshold or floor below the door, trouble is often experienced in that the strike plate opening is apt to become filled or clogged with dirt or foreign matter to such an extent that the protraction of the bolt is interfered with. The ordinary strike plates of this character are provided with a relatively small opening, usually substantially the size of the bolt itself,'and not only is it diificult to clean the dirt from such openings butalso, due to the relatively tight fit of the bolt'therein, the collection of asmall amount of 'dirt is sufficient to interfere with the operation of the bolt.

So-called emergency exit bar locks are generally of somewhat massive character, and are designed with a view to ornamental efiect so as to enhance rather than detract from the appearance of the door'upon which they are mounted. It is also contemplated in connection with this invention to provide a strike plate which will harmonize with door fittings ofthis character, in that it will be massive and ornamental in appearance.

Oneobject of my invention, therefore, is to provide a strike plate which will be selfcleaning in character in that any dirt, which collects in the strike opening will be pushed to one side when the bolt is protracted.

Another object of my invention is to provide a strike plate having a relatively large opening to receive the bolt, and a shoulder projecting into this openingto serve as a Serial No. 100,543

bolt keeper so that the bolt o pening'ma be readily cleaned and any dirt that col ects therein will assume a position which does not interfere with the action of the bolt.

Another object of my invention is to provide a strike plate with a relatively large opening which extends on three sides of the keeper member, which in the instance shown,

comprises shoulder projecting into the strike opening, the strike opening itself being considerably larger than the bolt with which the keeper is designed tov cooperate.

A still further object'of my invention'is the provision of a door strike or keeper of Fig. 1 is a sectional View of a lock and strike plate, illustrating a preferr'e'dembodi- I mentof my invention;

Fig. 2 is a sectional view on line 22 of Fig. 1 v r y 7 Fig. 3 is a top plan view oft-he strike plate; i I

Fig. 4 is a sectional view on line 44 of Fig. 3; i v i v Fig. 5 is a side-elevational view of strike plate. v

In Fig. 1 of the drawings I'have shown a door at 10, having mounted thereon a bolt structure comprising a vertically rec'iprocable rod 11 designed to be operated the by an emergency bar 12, as more fully" shown and describedin my copendingiap plication referred to, of'which'this appli-.

cation is a division.

At the lower edge of the door is a bolt case 18' to the lower edge ofwhich is pivoted at'lfl abolt' l5. This'bolt is adapted to have afplvotal or rotary movement, and is provided 'with'a recess 16 inwhich is received the end of alink 17', pivoted to the bolt at 18. At its other end, the link is connected to a bolt operating member or slide19 secured to the lower-end of the reciprocable rod 11. 20. in the link 17 in which is received a pin 21 secured to the member, 19 within a, recess 21* so that a certain amount of lost This connection comprises a slot' V motion will be permitted between these parts. The slide 19 is suitably guided in the case by means of oppositely projecting lugs 22 and 23, the latter being adapted 'to engage the undersurface of the coverof the case, while the former operates in a slot 24 in the base-plate 25 of the. casing.

Above the bolt operating mechanism just described, a detent or dogging stirrup 27 is pivoted to the case upon the pin 28, and a spring 29 upon this pin acts against the dogging member to tend to hold itin a depressed position, as shown in Fig. 1. This stirrup member is'provided at its lower end with across piece 30, adapted to engage bebind the bolt' 15 to dog it. in protracted position. It will be apparent that otherwise cross-bar or member 32 intermediate its length, which is adapted to rest upon a beveled shoulder 33 provided upon a portion of the bolt operating member 19.

It will be observed that when the operating rod 11 is drawn upwardly the shoulder 88, by engagement with the cross member 32 will cause the stirrup 27 to be raised until its lower edge has cleared the rear edge of the bolt 15. Due to the lost motion connection between the member 19 and the link 17, provided by the elongated slot 20,

and pin 21, this movement of the stirrup will be efiected prior to the beginning of the retract-ion of the bolt by the link which latter movement takes place upon a con tinued movement of the rod 11. It wilhof course, be apparent that as soon as the edge of the member 30 has cleared the bolt, the latter will be free to be swung to retracted position by pressure against the strike or keeper, so that in'practice, the bolt may be retracted in this way instead of by con tinued movement of the rod 11..

Secured inthe threshold or floor below the lower edge of the door to cooperate with the bolt 15 is a strike plate of novel con- 7 struction, provided with a recess 61. This 1 recess is relatively deep at a point designated tion toward the sides and 65*.

edge of the opening 61 is not parallel with.

by the numeral 62, where it is provided with an abrupt vertically disposed shoulder 63 to act as a keeper member to cooperate with the bolt to hold the door closed. From the point 62 the bottom of the strike plate opening slopes upwardly toward the rear edge 64 of the opening, and also in a lateral directhe front edge of the strike plate, as the shoulder 63 projects inwardly beyond the Vhfl I h shown and described The front adjacentedgesof the keeper opening to provide the two lobes 66 and 67, the edges 68 and 69 of which extend forwardly cbeyond V the keeper or shoulder 63 on either side thereoff The resulting conformation provide's that the deepest part of the strike opening is at the shoulder 63, and the bottom of the opening which extends on three sides of this shoulder or keeper has a somewhich serves to push any accumulated dirt from in front of the keeper shoulder 68 out- V351; bottom of the recess slopes upwardly all about the circumference of these lobes, the dirt is crowded or pushed out of the strike opening and does not remain compacted against the keeper 63 in thepath of the bolt. The projection of the keeper 63 into the strike opening beyond the front edges68 and 69 thereof, "permits the dirt or dust accumulated in the keeper opening to be pushed outwardly and forwardlyat a point adjacent the keeper 68 and tends to prevent its accumulation in front of the keeper.

In any event, the strike plate with its en larged strike opening and'projecting keeper member or shoulder is very readily cleaned with a broom or thelike, andmoreover, is quite ornamental in appearance so that it dly into the lobes 66 and 67 As the ice will harmonize with door fittings of massive character and may be advantageously used with locks having bolts other than the type shown. The keeper opening being largeand having a gradual slope upwardly in all directions from the bottom of the-projecting keeper member may be cleaned out more readily than the ordinary rectangular strike plate opening, which is comparatively inaccessible to a brush or broom. v 1

Pr ferred embodiment of my invention, it is understood that it is not limited to all the details shown, but is capable of modification and variation within the spirit ofthe invention and within the scope of the appended claims.

What I claim is: p

1. A strike plate having a strike opening therein constituted-by an upwardly facing recess, said recess having a closed periphery whereby it IS entirely surrounded by a part of the body of the plate, and'an abutment projecting into the said recess from oneedge thereof, the latter extendmg on three sides of the abutment.

V A strike plate provided with an abutment and an opening in front thereof, said opening being enlarged to extend laterally beyond the abutment, and the bottom 'of the opening sloping downwardly toward the abutment.

3. A strike plate for door locks comprising a body portion lying in a horizontal plane, said body portion being provided with an upwardly opening recess, the periphery of said recess being spaced at every point from, the edge of the body portion whereby it is entirely surrounded by the body portion of the plate, and an abutment projecting into said recess from one edge thereof to cooperate with a lock bolt.

4. A strike plate for door locks comprising a body. portion lying in a horizontal plane, said body portion being provided with an upwardly opening recess, the periphery of said recess being spaced at every point from the edge of the body portion whereby it is entirely surrounded by the body portion of the plate, and an abutment extending into the recess from one edge thereof at a point intermediate the width of the recess so that the latter extends rearwardly and laterally of said abutment.

5. A strike plate having a bolt opening therein, and a keeper shoulder projecting thereinto from the rear edge of said opening at a point intermediate the width thereof therein, and a keeper shoulder projecting thereinto from the rear edge of said opening at a point intermediate the width there- Of so that the opening extends rea rwardly and laterally of said shoulder, and the bot tom of said opening extending upwardly in three directions from the foot of the shoulder.

In witness whereof, I have hereunto set my hand this 1st day of April, 1926.

JOHN H. SHAWV,

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