US2390984A

US2390984A - Latch for screen doors and the like

Info

Publication number: US2390984A
Application number: US506541A
Authority: US
Inventors: Bloss Herman
Original assignee: H B IVES CO
Current assignee: H B IVES CO
Priority date: 1943-10-16
Filing date: 1943-10-16
Publication date: 1945-12-18
Anticipated expiration: 1962-12-18

Description

Dec. 18, 1945., H. BLOSS LATCH FOR SCREEN DOORS AND THE LIKE 2 Shets-Sheet 1 Filed Oct. 16, 1943 'Dec. 18, 1945. H.,B| oss' LATCH FOR SCREEN DOORS AND THE LIKE Filed Oct. 16, 1945 2 Sheets-rSheet 2 of the other hand.

Patented Dec. 18, 1945 Herman Bloss, Shelton, cibmil;

assignhli to 11.. B.;1ves Comnany, 'New Haven, Conn a cor- I This invention relates to door-latches and more particularly to a latch to be employed upon light doors snch as screen doors or the-like, although it will be understood that the latchmechanism shown herein is applicable for use with othertypes of doors if desired- In the manufacture of latches for screen-doors and the like, it is desirable that the latch be simply constructed and be composed of parts which may be economically made, such as'by stamping'operations for example. It is necessary, however, that the latch be capable of the usual functions, and that the mechanism lee-provided with means for dogging 'thel'atch against being operated from the outside of the door to prevent unauthorizedentrance. It is also a very-desirable feature of such latches that they be made "for use upon either right or left handdoors so that it will be unnecessary to make one latch for a door-oi one handand another latch :or a latch having other specially-made elements for a door The 'above advantages are present in the lock of this application in that the parts .may :be

cheaply and economically-made. Also,-the'lath may be employed upon either right orileft hand doors, as desired, without the nse oi"" any--additional or :specially made parts,-and the latch may be dogg'e'clag'ainst movement from the outsideof the door-by a retation oi the inner handle in a direction reverseto that-employed to move the latch. Moreover, the mechanism is so arranged that the inner handle normally "stands in a horizontal position an"cl-Whenthe handle is moved to a position to dog the latch against 1 movementit stands in a vertical position.

the user of the latch is always able to tell 'ata glance whether the latch bolt isdogg'ed or free, in thatfthe position of the handle is at once an indication of the condition of the parts. I his arises from the fact that the handleis permitted a rotation of substantially 90 from =its'normal position to its dogging position as well as from the fact that the'handle stands in-an uprig htor vertical position when the latch is dogged. v One object of the invention is to providea new and improved latch for screen or other doors of light weight.

.A still further object offthe invention is to provide a new and improvedlatch mechanismffor' screen doors or the like which may be made 1")0rati0nof Connecticut 9 I v I in I, J pplication Qctoher 16, 1943, Serial No. 506,541 .13 Glaims. loizaz -amy provide aalatoh mechanism for sscreen ;,doors ;s;or the :like which may lhezused with :a door lots-either hand-without. .thenemployment .of any different :orspecially-nnadesparts. 1

.A .still further iobiect :of the invention is to providea latch :mechan'ismgsior screendoprs or the. :like, .:so :arrangedthat..-,athe latch may: .be dogged against movement by ;-a ,reverse :rotation of-.z the :inside handlegthe position of the handle, 'wheneso rotatedflbeingsuch that .an indication or signalrwill :he pgivenzto. the :user that the latch .zis-dogged againstimovement.

lTo-thesejand other ends the invention relates to.v the movelieaturesand :oombinations of parts to be hereinafter described,.,and .claimed.

In the.accompanyingdrawings: 1, 7 Fig. l lis -la sectionalsviewof alatch mechanism embodyin :my invention -mounted upon a. :door

Fig.i2 is -a..sectional view on. iline 22-12 ofil lyshowingthe interior construction; i

Fig. '3 is a sectional =view :on line l33-o'f 1 "ig.

Fig.-.-4 isa=sectioneilwiewon --line oi' 'Fig. .3.showing the operation of the rollback operated bythe outside handlew 1 Fig. 5-is a View similar to Fig. 4 with-the inner cover plate of the latch casing removed to show the interior construction; 1

=-Fig.-6 is aqiew-similar to Fig. 5 'but showing the inside latch operating mechanism or inside rollbackin another position; i

Fig". 7' is a fIOIXVViEW-UT the latch mechanism t th i sid f the dqor a.

Fig. "8 is an inside -e1evational view of the escutcheon and associated parts at the outside oi thedoor; I s

Fig. 9 is a view similar to -Fig. 2, showing the application ;ofthe latch mechanism to a door 0 of the oppiosite hand;and

cheaply and economically, and which will :be-cap able of performing all the functions desired in a latch mechanism of this type.

A still further object of the invention is to Fig (10 =is-a View similar --to Fig. 4, showing the he the position occupied when applied to a-door oithe'otherhand. I x I :fIfo illustrate a preferred embodiment of my invention; I -hay shown; in the drawings a -door 10, st; has -a sc reen 'door, for example, hinged at, d l -and adapted to close against a stop -12 mounted 'Qnjthe door jamb 1 3.- -Upon-fthe=stop 12 is mounted a strike mechanism provided with keepers l4 and it, which l eegiers are-adapted-=to cooperate with-thelatch as hereinafterdescribed, to hold the door in closed position.- It will be understood that only one-of thelkeepers acbut that the two keepers are provided in order "that the same strike mechanism -may be used surrounds the hub 35.

with either right or left hand doors. As shown in Figs. 2 and 9, when the mechanism is mounted on the doors of opposit hands, the strike mechanism will be reversed. In each case the latch will cooperate with the lower one of the two keepers, this being the keeper 4 in Fig. 2 and the keeper |5 in Fig. 9.

The latch mechanism is mounted at the inside of the door and enclosed within the case l1, secured to the door by screws |8 passing through openings l9 in the case. Secured within the case, within spaced relation to the outer wall thereof, is a partition plate 20, Whichplate isspaced from the outside of the case by the displacement of the wall of the latter about the openings |9, so that certain parts of the mechanism may be mounted between the plate and the outer wall of the case. a

A stud 22 is secured to this plate adjacent one edge thereof and a latch member 23'is pivoted upon this stud.. This member, as shown more particularly in;Figs.. 5 and ,6, has a relatively large opening 24in the bod thereof, through which projects the hub .of theinner handle, as will be hereinafter described, and a projecting endportion 25 adapted to cooperate with one of the keepers. As shown in Fig. 1 at 26, this end portion is displaced inwardly from the body 23 opposite direction or toward theinside of the door. lugs constitute the means by which the inner and As will behereinafter explained, these outer handles "operate the latch member and they are symmetricallyarranged with respect to the longitudinal axis of the latch member so that one of each of theseglugs isin operation when the latch is used with a door of onehand and the other of each ot these'lugs is in opera- 1 tion when the latch is used with a door of the other hand.

The latch member is alsoiprovided with a stud projected toward the outside of the door,

which stud projects through a slot 3| in a cover plate 32 serving as'the inner cover of the case H. It will be understood that this cover holds the latch member in place and the movement of the latch member is limited by the travel of the stud 30 in the slot 3|. The plate 32 is also provided with openings 33 which permit the projection therethrough of the lugs 28.

Rotatably mounted in the outer portion of case n is the hub 35 of the inner handle as, the hub being held in place by a spring ring 31 mounted in an annular groove in the hub 35 and engaging against the flange 38 formed on the case which Mounted on an inner reduced end 39 of this hub and held in place by the split ring 40 is alatch actuating member or rollback 4| so that the rollback is rotated by rotation of the handle 36 about the axis of the hub 35, and, it maybe noted, eccentric tothe pivot 22 of the latch member.

As shown in Fig. 3, this rollback lies substantially in the plane of the plate 29 and is provided with symmetrically arranged shoulders 43 adapted to engage one or the other of the lugs 29 to operate the latch. It is also provided with an arcuate edge portion 44 generally concentric with the axis of the hub 35 to engage one or the other of the lugs 29 and dog the latch against movement, as will be hereinafter more fully explalned.

It will be apparent that, as shown in Fig. 5, for example, when the rollback is rotated in a counter-clockwise direction it will engage the upper of the lugs 29 and thus move the latch member 23 in a counter-clockwise direction about its pivot 22, thus raising the latch member until its projecting end 25 disengages the keeper l4, As the rollback 4| and latch 23 move about different axes, the lug 29 will ride upwardly on the shoulder 43 and ordinarily would be moved out of engagement with this shoulder. It is therefore desirable to limit the rotation of the rollback in a direction to operate the latch so that the lug 29 will not be moved beyond the edge of the shoulder 43.

For this purpose, the rollback is provided with a lug 46 projecting inwardly, which lug is adapted to be engaged by the

hooked ends

41 and 48 of an .escapement member 49 freely pivoted at 50 between the'outside of the case and the plate 29. Thus, as shown in Fig. 2, when the rollback 4| is rotated in a clockwise direction, the lug 46 will be engaged by the hooked end 41 of the escapement member 49 and will be prevented from further rotation. When, however, the rollback 4| is rotated in a counter-clockwise direction as the parts are shown in Fig. 2, the lug 46 will pass freely above the hooked end of the escapement 49. v

In order that the rollback 4| and the inside handle 36 to which it is secured be normally restrained in the position shown in Fig. 2 in which the handle projects in a horizontal directionand the latch member is engaged with the keeper l4, the roll-back 4| is provided with a projecting lug 52 carrying a stud 53 engaged by i the ends of

springs

54 and 55 mounted upon studs '56 and 56 in the case. These springs are also ;'provided, respectively, with bent portions 5l and the position shown inFig. 6 so that the inner handle will alsobe releasably held in these positions. In orderthat the latch mechanism may be operated at theoutside of the door, an outside handle 69 is rotatably mounted in an escutcheon 6| secured to the door by screws 53, which handle is provided with a square opening 64 to receive a similarly shaped spindle 65 which extends through the door and has its other end loosely and rotatably received in the hub: 35. Mounted on this spindle, adjacent the inner cover 32 of the latch mechanism, is an outside rollback 66 of theform shown in Fig, 4, this rollback having anarm 61 engaged below the stud 39 on the latch member 23 and also having a. cam shaped end 68 engaging one or the other of the lugs 29. It will be seen, therefore, that the latch may be lifted or disengaged from the keeper by operation of the outside handle in either direction. If, for example, the-outside handle is moved in a counter-clockwise direction, as the parts are shown in Fig. 4, the end. of the rollback 66 will engage the stud 3 0 and serve to lift the latch, while, if the outside handle and spindle 65 are rotated in a clockwise direction, the upper surface of the cam shaped portion 68 will engage thelug 28 and also serve to lift the latch or rotate it in a counter-clockwise direction out of engagement with the keeper I4. I r

tment member 119 so that the rotation of the moll- In order to normally maintain the outside "handle 111.3. horizontal position in :alignment with the inside handle, the hub (ill of the outside .handlehassecured theretowithin the .escutcheon .Gzl .a;..plate J0, andsprings .H and 12 :are secured at one .of their ends .to the .plate 1.0 and at the other of their ends .toztheescutcheont I. Thusit will-be, seen that rotation of the handled-n either direction extends :one or the other-of thesesprings and the parts :ofthe latch when the door is in this positionare shown-in Figs. .1 to 5. The 1 door,

es' previously stated, may be readily opened from the outside by turning the handle 60 in either "direction and as shown-in the rollback 65 will-engage with the stud- 30 on the latch member when the handle is rotatedin-onedirection-and will engage with the upper "lug 2S onthe latch when the handle is rotated in the other y direction.

' This will raise the latch out-ofengagement with the keeper l4, rotating itabout the pivot 22. The movement of the lateh will'be limited by the "length of the slot 31 inplate 32 shown in- Fig.4.

' "lEfitis desired to open thedoo'r from the inside, thednside handle is-rotated -loyturning it away from the observer asshown in Fig. l or in a counterclockwise direction asshown Fig. 5.

This rotates the rollback '41 in a'clockwise direction, shown in Fig-.- 2,or in a counter-clockwise direction shown in :Fig-.- 5, as the views of- -Figs.- -2 -and---- are looking in opposite directions. During this movement of the rollback, the shoulder 43 engages the upper of- -t-he lugs 29 --shown inthese figureeand' serves to lift-*the'latchoutofengagement withthe keeper l d-byrotating it about the pivot 22. As heretofore stated, the rollback-M and latch member 23 are eccentrically pivoted and therefore continuousmovement of the "rollback would pushth lugi9-beyond theend of the surface t3 *ifthe rol1back--wererotated through a suiiicient angle. To prevent this occurrence, therotat'ion of the rollback-is limited in this direction-by engagement ofthe log 46 with the hooked end-4 7 of the escapement'member' w'so that whilethelatch is-raised'to asufficient' extent to clear the keeper M- when the handleis released, "the handle will-be returned to its original 'posit'ion by engagement of the spring 55'with'the stud-53-and the latch-Will again drop "back to the position shown.- It will be understood that" the" end of the latchis cam shaped-so that the latch'w-illride over the keeper when moved to closedposition.

If his desiredto dogthe latch against operation by 'the outside handle, the inside handle is 'rota't'ed'in a, direction opposite to'that'just described; from the position shown 'in Fig's. =1 and 5 to the position shownin'Fig. 6, inwhich position it is vertically disposed, This'rot'ation of the handle 36serves to turn the rollback -41 from the position shownin 5to that shown in Fig. '6, in which position the 'arcuatesurfa'ceM stands overthe lower of the-two 1ugs29 and thus" dogs the latch against movement by'the outside knob as'it prevents the lifting of 'the'l-at'ch about the pivot"2'2. It will benoted that, as 'shown in Fig. 2, Whenthe' rollback is moved in this'direction, the lugdfi ciears 'thehooked end It of the'esc'ape- 'backis notlimited in this direction by the escapement member. Likewise; the lower shoulder .43, asshownin this "figure, does not engage with the lower of the lugs ,29 but, in this position of the parts, passes this lug. Also, as shown in Fig. 6,

the stud .53 is engaged by the curved portion :5] of the spring 54 and the rollback and inner knob .releasably held against accidental displacement, with the inner handle vertically disposed so that a'user mayinstantly tell that the door is locked or the latch dogged against movement.

If it is desired to mount the latch one door of the other hand, the flock case is simply inverted or turned through an angle of about ,a horizontal so that the parts will be moved from the position shown tin-Fig. 1 2 to that shown Fig. 9. It will'behoted that the latchmember .23 thereupon drops to the opposite end;.of the slot 2;? and alsothe escapement member 49 drops about its pivot 55 to the position shown'in Fig.;9. That is to say, the escapement member drops by gravity when the lock case is inverted so thatin the position shown in Fig. 9 the opposite hooked .end 38 will be contacted by the lug 46 to limit the movement :of the rollback. With the latch member 23 and the esca-pement member :49 in the positions shownin Fig. 9, the operationof the inside handle will b exactly as previously described except that the rollback 49 will contact the other of the two lugs 29 to lift the latch, due to the fact that therrollback and latch .member are-both symmetricalwith respect to center lines drawn through their pivots and due to thefact that the latch member occupies a difierent :positionofrest whenthe-mechanism is inverted fora door of the other hand. That is to say, in :one case one of the surfaces 43-:contacts with IOIlGOf the lugs zto lift the latch while in the other position :as 'used with a door of the other hand, the other surface "4.3 will engage the other lug .29 to'lift the :latch, which other lug is brought into rangebof movement of the surface 43 .by'the movement of the latch, when inverted, from one end to theotherof the slot v21'].

When inverting'the mechanism for use with ado'or of theother bandit isnecessary to change the position of the rollback 65. This is done by sliding the spindle t5 outwardly from the hub 35 oftlie inner handle to a slight extent and rotating this spindle until the end 61 of the rollback stands upon'the other side 'of the-stud 3t. Thiswill bring the cam surface 68inchgagement with the other of the twolugs "28 when thestud sil'is at-the other end of the slot3-l from thatshown'in-Fig. 4,-asitwill bewhe'n the latch isinverted. Thisslight change in'the position of "the rollback 66' is'theonlyalteration' necessary to change the latch *from use upon adefthand ".stood' that'it is not to be limited to all of the details shown but is capable .ofmodification and variation within the spirit oftheinv enton and within'the scope of the appendedclaims.

What Iclaim'is": p

1; Aldoor latch meuiams comprising g2, -.case,

a latch member pivotally mounted in the case to swing about a horizontal axis and projecting from the case for engagement with a keeper, a latch actuating element carried by-thecase, said element being movable in one direction-to swing the latch member upwardly and movable in-the opposite direction to dog the latch member against movement, and a handle connected to said element to operate the latter, and means releasably holding said handle in a horizontal position when the latch member is engaged with the keeper and in a vertical position when the latch isdogged against movement. r

2. A door latch mechanism comprising a case,

alatch member pivotally mounted in the case to swing about a horizontal axis and projecting from the casefor engagement with a keeper, a

' latch member is engaged with the keeper and in a vertical position when the latch is dogged against movement.

3. A door latch mechanism comprising a case, a latch member pivotally mounted in the case and'projecting therefrom to engage a keeper, a latch actuating element rotatably mounted in the case to swing about an axis eccentric to the pivot of said latch member, a lug on said member, said element having a part engaging below said lug when said'element is moved to lift the latch, and means to limit movement of said element to hold said part in engagement with said lug.

4. A door latch mechanism comprising a case, alatch member pivotally mounted in the case and projecting through an elongated opening in the case to engage a keeper, a latch actuating element rotatably mounted in the case to swing about an axis eccentric to the pivot of said latch member, a pair of lugs on the latch member between which said element is disposed, said latch member lying adjacent one end of said opening in one osition of the case and adjacent the other end of the opening when the case is turned through an angle of 180, and said element when said latch member is in one of said positions being adapted when rotated in one direction to engage one of said lugs and move the latch member and when rotated in the other direction being adapted to engage the other lug and dog the latch member against movement and when said latch member is in the other position to engage said second lug to move the latch member and engage said first lug to dog the latch member against movement.

5. A door latch mechanism comprising a case, a latch member pivotally mounted in the case and projecting therefrom to engage a keeper, a

latch actuating element rotatably mounted in the case to swing about an axis eccentric to the pivot of said latch member, a pair of lugs on said latch member between which said element is disposed, said element having spaced shoulders to engage one of said lugs to lift the latch member when the mechanism is mounted in one position on a door and being adapted to engage the other of said lugs to lift the latch member whenlthe mechanism is turned through an angle .of 180? about I a horizontal axis, and means rotatably mounted inlthe case to engage and to limit movement of :said element in a direction'tolift the latch mem- ,ber..

6. A door latch mechanism comprising a case, a latch member pivotally mounted in the ,caseand projecting therefrom to engage a keeper, alatch actuating element rotatably mounted in the case to swing about an axis eccentric to the pivot of said latch member, a pair of lugs on said latch member between which said element is disposed, said element having spaced shoulders to engage oneof said lugs to liit the latch member when the mechanismis mounted in one position on a door and being adapted to engage the other of said lugs to lift the latch member when the mechanism is turned through an angle of about a horizontal axis, and means having, spaced stops thereon to engage andto limit movement ofsa d element in ,a direction to lift the latch member, said means being movably mounted in the case to shirt this position when the mechanism is inverted to limit movement of the element in the opposite direction to lift the latch member.

7. A door latch mechanism comprising a case, a latch member pivotally mounted in the case and prolecting thei'eirom to engage a keeper, a latch actuating element rotatably mounted in the case to swing about an axis eccentric to the pivot of said latch member, a pair of lugs on said latch member between which said element is disposed, said element having spaced shoulders thereon to engage one of said lugs to hit the latch member when the mechanism is mounted in one position on a door and being adapted to engage the other of said lugs to lift the latch member when the mechanism is turned through an angle of 180 about a horizontal axis, an escapement member pivoted in the case having pro ecting ends, and one of said ends being disposed in the path of .movement of a part OI S310. element when turned in one direction in either position 01' the mechanism.

:5. A door latch mechanism comprising a case, a latch member pivotally mounted in the case and projecting therefrom to engage a keeper, a latch actuating element rotatably mounted in the case to swing about an axis eccentric to the pivot or said latch member, a pair or lugs on said member between which said element is disposed, said element when turned in opposite directions being adapted to engage one of said lugs to hit the latch and the other mg to dog the latch against movement, and a swinging stop member to limit movement or said element when lifting the latch.

9. A dooi latch mechanism comprising a case, a latch member pivotally mounted in the case, a spindle rotatably mounted in the case, a handle at the outside of the door to operate said spindle, said latch member having a pair of outwardly projecting lugs thereon at one side of said spindle and an outwardly projecting stud at the other side of said spindle, and a, rollback on said spindle having a part lying below and adapted to engage said stud and an opposite portion disposed between said lugs.

10. A door latch comprising a case, a latch member pivoted therein having a free end extending from the caseto engage a keeper, a latch actuating element rotatably carried by the case to move about anraxis disposed between thepivot and the' free end of the latch member, said latch member having a pair of vertically spaced abut- ,ments thereon intermediate its ends, and said element being disposed between said abutments and serving, when moved in one direction, to em gage one of said abutments to actuate the latch and when moved in the other direction to engage the other of said abutments to dog the latch against movement.

11. A door latch comprising a case, a latch member pivoted therein having a free end extending from the case to engage a keeper, a latch actuating element rotatably carried by the case to move about an axis disposed between the pivot and the free end of the latch member, said latch member having a pair of vertically spaced abutments thereon intermediate its ends, and said element being disposed between said abutments and serving, when moved in one direction, to engage one oi-said abutments to actuate the latch and when moved in the other direction to engage the other of said abutments to dog the latch against movement, and an escapement member pivoted in the case to limit movement of said element when moved in a latch actuating direction.

12. A door latch comprising a case, a latch member pivoted therein having a free end extending from the case to engage a keeper, a latch actuating element rotatably carried by the case to move about an axis disposed between the pivot and the free end of the latch member, said latch member having a pair of vertically spaced abutments thereon intermediate its ends, said element being disposed between said abutments and servso an angle of 180 about a horizontal axis to limit movement of the latch actuating element when turned in the opposite direction.

13. A door latch comprising a case, a latch member pivoted therein having a free end extending from the case to engage a keeper, a latch actuating element rotatably carried by the case to move about an axis disposed between the pivot and the free end of the latch member, said latch member having a pair of vertically spaced abutments thereon intermediate its ends, and said element being disposed between said abutments and serving, when moved in one direction, to engage one of said abutments to actuate the latch and when moved in the other direction to engage the other of said abutments to dog the latch against movement, said abutments being symmetrically disposed on said latch member, and means normally supporting said member in an inclined position.

HERMAN BLOSS.