CA1281346C

CA1281346C - Sash lock

Info

Publication number: CA1281346C
Application number: CA000485008A
Authority: CA
Inventors: Gary F. Paulson; Gregory J. Vetter
Original assignee: Truth Inc
Current assignee: Truth Hardware Corp
Priority date: 1984-12-13
Filing date: 1985-06-24
Publication date: 1991-03-12
Anticipated expiration: 2008-03-12
Also published as: AU566399B2; GB8519153D0; JPH0527749B2; GB2168416A; NZ212968A; GB2168416B; DE3536905A1; AU4736485A; JPS61142274A; US4621847A

Abstract

ABSTRACT

A sash lock for a casement window having a case with two sections of different height and with the lower level section having a top wall with a circu-lar segment opening with a curved edge which receives a generally circular part of a rotatable operating member positioned in the opening and extending under a vertical wall interconnecting the two case sections of different height. The rotatable operating member has a curved edge of the same curvature as the curved edge of the case top wall opening as well as a peripheral flange underlying the curved edge of the top wall open-ing whereby in all rotative positions of the planar operating member the opening is effectively sealed.

Description

~ITI.E OE' THE :tNVENTION

S~S~ I.OCI~

BACXGROUND OF THE INVENTION
.
Thi~ invention pertains to a gash 1QC~C ~or a pivot~lly moun~ed w~ndo~ and"no~e~ par~icularly~ ~or a casernent window. The ~a~h l~c~ $~ o~ a al~w and imp;roved construction providins~ an e~ectively ~eal~d transitic~n between the interior an~ exter~or of the c~e of tAe ~ash lock by mean~ o~ an operA~ng m~er whle:ll i8 exposed externally of ~he c:ase and exteDd~ ~lth~n ~e i~terior of the ~:a~e an~ caxrie a movable lock member for coaction with a keeper~. Ths texpo~ed part of . he operating member is shaped tb remain.in æealing r~lat~on with an opening in the top o~ the ca~e.
~5 ~ prio~ ~ash locJc for n t:~sement window ~s ~h~wn in van Xlompanburg u.s. Patent No. 4,059,2g8, owned by the assignee of this appl~:at~oa10 ~n th~ prior ~a~h locX, a general~y planar operating mem~er carries a lock mem-ber positioned with~n the eas~ of th~ sash lock ~or co-2 o action with a lceeper ~nd ~ p~xt~ on o~ the ~enerally planar operating mem~er extendE; ~hrough an elongate opening defined by v~rt;~:ally-fipa2ed wall~ of ~ ~ect~on o~ the case and ~nount6 E~ har~dle wh~ can ~nov~ along the length of the elongate opening between twv oper2~tive positions in whi~h the ~ash locX ~ elther ~n loclc or unloc:ked pc~s ~ tions O
In the prior ~sh loc~, there ~ ver~ical wall with an opening ~n wh~ch ~ gener~lly ~ixcular par~ o~ the planar operating ~ er ~ d~posed ~nd ~ p~ir ~f vert~-cal edg~s Elt the ~ides o~ the op~n~ng lie clo~ly adja-c:ent to t~e p~riphery o~ the c:ircular part of ~e plarlar member in an e~fo t to seal thi~ openirlg betw~en the interiQr and exterior of thB ~ash lo~k ezlseD ~ddit~ on~lly~
there i~ a disc- haped ~pr~r~g f~tted on the E7ivot mounting J

L3~16 for ~he operating menb~r posit~oned between tl~e ur~der-, side of the case top wall and the upper ssur~Eace o~ the circular part o:E the pl~nar c~peratirlg member to hold the planar operating member in adjusted posit~o2 zmd also to ~urther effect a ~eal 1: et:ween the interior and exterior o~ the ca~e~ This prior sash loc~k has nl~t effectively precluded passage of insect~ ~rom the $nterior of the case to ~he ex~erior therr!of.
A modificat~on of the prior sash lc:)c:k ~ a nc~n-handed unit, in tAat it can be ~soc~ ated with either a right-hand or left-hand casement window by hELving two different lock positions wherç!in a lcc)c member is asso-ciated with a keeper.. Th~s modi~cation hav~ng two lock positions i5 ~hown in A~derson U.S. Patent No. 4,42g,910 also owned-by t~e assignee of this application.
This last-mentioned patent discloses a ~tru~ture w~erein a bug entry pro~lem does nut ari~e ~ince the handle is a~sociated with ~ ro~atabl~ ~a~t pas~ng through ~ circular opening in th~ top o~ the $ash look case and which has only rot~tional ~oveme~t within the opening and ~an be ~ffectively ~ealed.
The sash lock ~mb~dy~ng the ~.nvention providss for effective sealing o~ an operatin~ me~ber o~ ~he ~ash lock which ~s posit~ned partly wit~in the ca~e and partly exter~orly there~f~ without requiring extremely close t~lerance~ ~etween parts o the operating member and the ca~e ~nd a handl~ may b~ d~rectly ~ss~ciated with *he exposed part of the operat~ng member.
SUMMARY OF THE ~NVENTION
. ~

~ primar.y ~eature of the inven ion ~s ~o provide a new and ~mproved 6a~h 1QC~ h~v~ng an operat~ng ~ember carrying a lock member d~sposed w~thin a ca~ o~ the sash lock and with a par~ c~f the operat~ny member exposed to ~e exteric~r of the ca~e and with the operalt~ng member and case being ~n closely ~n'cer~tt~ng relatis:n tD avoid any opening which t:ould permit pa~sa~e of i~sects there-through.

In carrying out the foregoing, the sash lock has a case section with a top wall having an opening with a generally semicircular edge. A planar operating member has a pivot mounting within the case and a generally semlcircular part located within the opening and with the edge of the part closely adjacent the edge of the opening and with the curvatures related to the pivot mounting of the operating member whereby the edges of the opening and the operating member remain closely adjacent to each other in all rotative positions of the operating member.
In addition to the foregoing structure, the planar operating member has a peripheral flange underlying the edge of the opening in the top wall of the case section to assist in effecting a seal between the operating member and the case.
The invention in one aspect comprehends a sash lock having a case with two sections, one section having an open interior in which a movable lock member is positioned, the other section being adjacent the first section and having a ~0 top wall with an opening which is a segment of a circle and having a curved edge. An operating member carrys the lock member and a pivot mounts th,e operating member at a distance from the curved edge of the opening, the operating member having a part positioned to fill the opening and having a curved peripheral flange underlying the curved edge to close the opening. A handle is secured to the upper side of the operating member part.
Another aspect of the invention pertains to a sash lock having a case, a locking cam positioned within the case for coaction with a keeper, and a planar operating member pivotally mounted on the case ~or movement about a pivot axis and carrying the locking cam. The case has upper and lower level sections with the locking cam and a first part of the planar operating member being within the upper level section.
The lower level section has a top wall with an upper surface generally level with the top of a second part of the planar operating memb,er extending out from the upper level section.
The top wall has an opening with a semicircular edge with a center of curvature at the pivot axis and the planar ~0 operating member second part has a curved periphery with a center of curvature at the pivot axis to movably fit within and maintain the top wall opening closed in all rotative positions of the planar operating member. A handle is fixed to the upper sidle of the second part of the planar operating member.
7'~ 3.

~8~3~
Another aspect of the invention comprehends a sash lock having a case formed of an upper level section and a lower level section and a back plate and a pivot mounting on the back plate. An opening in an upper surface of the lower level section has a generally semi-circular edge with the pivot mounting as its center. A generally vertical wall interconnects the upper and lower level sections and has an intermediate part extending downwardly to the level of the upper surface and overlying the opening. A generally planar operating member is pivotally mounted on the pivot mounting and has a generally circular periphery with the pivot mounting as its center and positioned to be closely adjacent the semi-circular edge to provide a movable transition between the exterior and interior of the case while closing off the opening through the generally vertical wall provided by the intermediate part overlying the opening. A peripheral flange on the planar operating member underlies the semi-circular edge and a lock member is carried by the p~lanar operating member within the case upper level section. A
handle is fixed to the upper side of that part of the planar operating member which is positioned in the opening.
A still further aspect of the invention comprehends a sash lock having a case, a locking cam positioned within the case for coaction with a keeper, and a planar operating member pivotally mounted on the case for movement about a pivot axis to cause operation of the locking cam, the case has upper and lower level sections with tha locking cam and a - first part of the planar operating member being within the upper level section and the lower lavel section has a top wall with an upper surface generally level with the top of a second part of the planar operating member extending out from the upper level section. The top wall has an opening with a semi-circular edge with a center of curvature at the pivot axis and the planar operating member second part having a curved periphery with a center of curvature at the pivot axis to movably fit within and maintain the top wall opening closed in all rotative positions of the planar operating member. A handle is fixed to the upper side of the second part of the planar operating member.
A further aspect of the invention is to provide a sash lock as defined in the preceding paragraph wherein said planar operating member has an outwardly-extending peripheral flange positioned beneath said top wall of the lower section of the case.
4.

BRIEF D~SCRIPTION OF THE ~RAWINGS

Fig. 1 is an elevational view of the sash lock, shown in association with a fragmentarily ~is closed casement window ~nd wi~h t]he ash lock in a locked position;

~ ig. 2 is a b~ttom view ~f the 6ash lock, ~hown in association with the sash of the casem2nt wind~w, but with the cassment window frame omitted and with the sash lock in the locked position;

Fig. 3 is a view, similar to Fig. 2, showing the sash lock with parts in full line position in an unlocked position and iD an intermediate position in broken line;

. Fig. 4 is a sectional viewp on an enlarged scale, taken generally along the line 4-4 in Fig. l;

~ ig. 5 is a sectional view, taken generally along the line 5-5 in Fig. 4, and Fig. 6 is a ~ectional view, on an enlarged s~ale, taken genexally along the line 6-6 in Fig. 1.

DESCRIPTION OF THE PREFERRED EMBODIMæNT

The sash lock has a case, indicated generally at 10, which mou2lts to a vertical member 11 of a case-ment window frame by means of attaching ~crews 12. The case 10 mounts ~t:ructure for locking a casement window sash 15 ~o the casement window frame by engagement with a keeper, indicat:ea generally at 20p and whi~h mounts to a window sash 15 by attaching screws 21 exte~din~ ~hrough a base plate 22 of the keepPr. An outwardly-extending 3~`

part ~4 of the keeper 20 extends from an edge of the base plate 22 and has an inturned end 25 spaced from the base plate 22.
The case 10 has an upper level ~eotion 30 and a lower level ~eetion 31, with an underlying ~ase plate 32 secured thereto by attachmen~ to the lower ~nd of tubular members 33 and 34, formed integrally with the ~ase lower level ~ection 31 and which are of a ~ize to receive attaching screws 12. The upper level ~ection 30 . 10 ~f thP case opens ~o the rear of the sash lock whereby the keeper 20 may lenter in~o the interior thereof, as seen in Fig. 6, for coaction with 70ck mechani~m within the ase.
The l~ck mechanism includes a generally planar operating member 40 pivotally mounted to the base ~late 32 by a rivet 420 A spring washer 43 disposed between the hiead of thP rivet and the upper 6urface of thP planar operating member operates to hold th~e planar operating member in adjusted position.
The planar operating member rotatably mounts a lock member 45 wh~ch is fixed to a pin 46 rotatably mounted in the planar opierating member and which extends therethrough and, at its lower end, is fixed to a gear 47 which meshes with an arcuate gear segment 48 ormed along a ~urved edge of the base plate 32.
The l~ck member 45 is in the form of a tri-angularly-shaped cam having three rounded corners 50-5~
with three flat surfaces extending one between each pair of rounded corners. With the ~ash lock in locked position, as shown in Fig. 1, a flat surface between the rounded corners 50 and 51 engages with the inturDed end 25 of the ~eeper to hold the window sash in closed position. As seen in Fig. 3, with the lock mechanism in u~lo~ked : position, the lock member 45, in full line, has m~ved 3~ away from the k~eeper 20 wherPby the window sash i~ free to mo~e between open and closed positions.

~8~3~

The general operation of the lock member 45 ls more particularly described in the aforesaid Ander-son Patent No. 4,429,910. ~h~ ck member 45 disclosed in this application di;;tinguishe~ from that shown in the Ander~on patent by having the third rounded corner 52 at the same distance rom the mounting shaft 4~ as the rounded corners 50 and 51 whereby, as the sash lock m~ves from locked to unlocked position, the rounded corner 52 can exert an opening force on the window sash by engaging the base plate 22 of the keeper 20, as seen in broken line in Fig. 3.
The generally planar operating member 40, as seen in Fig. 5, has a generally circular periphery, with the pivot axis defined by the rivet 42 being the center f curvature~ The rivet 42 and a portion of the planar operating member lie within the interior o~ the case up-per level section 30, with a generally circular section 60 thereof extending outwardly of a vertical wall 82 extending between the case upper level ~ection 30 to the case lower level ~ection 31. The generally circular section 60 of the planar operating member has a handle 65 fixed to . the upper side thereof for movement between locked and unlocked positions above the surface of a top wall 66 of the case lower level section 31. The top wall 66 has a pair of raised sections 70 and 71, with converging faces 72 and 73, respectively, extending upwardly from the top wall 66 and which define limit positions for the handle 65. The inner ends of these walls or ~urfaces 72 and 73 terminate at an opening 75 in the top wall 36 of the case lower level section 31 which is shaped as a segment of a circle and has a generally semicircular edge 80.
The vertical wall 82 terminates above the opening 75 in the top wall 66 of the lower level section 31 of the case as seen in Fig. 6 whereby the planar operating member 40 and, particularly the generally circular sec~ion 60 thereof, can make a tra~sition between the two dif-ferent level sections of the case. The generally circular ,~,~,..

~J~ 6 s ction 60 ~f the planar operating member has the circu-lAr edge 85 which, with the edge 80 of the opening, lie on circ-~es having a curvatuxe wit.h the axis of rotakion about the rivet 4 being the center of curvature. As seen in Fig. 5, as the handle 65 move~ in a counterclock-wise direction from the position E;hown, the edges ~0 and 85 remain in closely adjacent relation.
To a sure a continuous se~al of the operating member to the case, a peripheral ~lange 86 extends out-wardly from the circular edge 85 of the planar operating member and b~neath the top level thereof to underlie the ~dge 80 of the opening in the lower level section top wall 66 in all rotative positions of the operating member.
A raised curved ridge 90 on the upper ~ide of the generally circular section 60 has a curvature with the pivot axis ~t rivet 42 as i~s center and underlies an innermost part of the vertical wall section 82 and slidably engages therewith t~ assure that the expo~ed upper ~acP
of the planar operating member doe~ no come into rubbing contact with the underside of the vertical wall 82.
From the foregoing description, it will be evi-dent that a sash lock has bee~ disclosed wherein an operating ; member can make a sealed txansition between the exterior : of a sash lock case to ~he int~rior thereof for operation of lock mechanismD This is achieved by a genexally circular section 60 of the planar operating member being disposed wi~hin an opening in the top wall S6 of the case which is ~haped as a segment vf a circle and extending under the vertical wall 82 and havin~ a circular edge 85 as well as the peripheral flange ~6 which coact with the circular edge 80 of the top wall opening in all rotative positions of ~h planar operating member.

Claims

1. A sash lock having a case with two sections, one section having an open interior in which a movable lock member is positioned, the other section being ad-jacent said first section and having a top wall with an opening which is a segment of a circle and having a curved edge, an operating member carrying said lock mem-ber, a pivot mounting for said operating member at distance from the curved edge of said opening, said operating member having a part positioned to fill said opening and having curved peripheral flange underlying said curved edge to close said opening, and a handle secured to the upper side of said operating member part.

2. A sash lock having a case, a locking cam positioned within the case for coaction with a keeper, a planar operating member pivotally mounted on the case for movement about a pivot axis and carrying said locking cam, said case having upper and lower level sections with said locking cam and a first part of the planar operating member being within the upper level section and said lower level section having a top wall with an upper surface generally level with the top of a second part of the planar operating member extending out from said upper level section, said top wall having an opening with a semi-circular edge with a center of curvature at said pivot axis and said planar operating member second part having a curved periphery with a center of curvature at said pivot axis to movably fit within and maintain said top wall opening closed in all rotative positions of said planar operating member, and a handle fixed to the upper side of the second part of said planar operating member.

3. A sash lock as defined in Claim 2 wherein said planar operating member has an outwardly-extending peripheral flange positioned beneath said top wall of the lower level section of the case.

4. A sash lock as defined in Claim 3 including a handle fixed to the upper side of the generally planar operating member for movement above the top wall of the lower level section of the case.

5. A sash lock as defined in Claim 2 wherein said locking cam is rotatable on said planar operating member and has three lobes with one of said lobes being operative to exert an outward push on said keeper.

6. A sash lock having a case formed of an upper level section and a lower level section and a back plate, a pivot mounting on said back plate, an opening in an upper surface of said lower level section having a generally semi-circular edge with said pivot mounting at its center, a generally vertical wall inter-connecting said upper and lower level sections and having an intermediate part extending downwardly to the level of said upper surface and overlying said opening, a generally planar operating member pivotally mounted on said pivot mounting and having a generally circular periphery with said pivot mounting at its center and positioned to be closely adjacent said semi-circular edge to provide a movable transition between the exterior and interior of the case while closing off the opening through the generally vertical wall provided by said intermediate part overlying said opening, a peripheral flange on said planar operating member underlying said semi-circular edge, a lock member carried by said planar operating member within the case upper level section, and a handle fixed to the upper side of that part of said planar operating member which is posi-tioned in said opening.

7. A sash lock as defined in claim 6 wherein said planar operating member has a raised curved ridge adjacent the pivot mounting for engagement with a surface positioned inwardly of said vertical wall to maintain said planar operating member out of contact with a lower edge of said vertical wall.

8. A sash lock having a case, a locking cam positioned within the case for coaction with a keeper, a planar operating member pivotally mounted on the case for movement about a pivot axis to cause operation of said locking cam, said case having upper and lower level sections with said locking cam and a first part of the planar operating member being within the upper level section and said lower level section having a top wall with an upper surface generally level with the top of a second part of the planar operating member extending out from said upper level section, said top wall having an opening with a semi-circular edge with a center of curvature at said pivot axis and said planar operating member second part having a curved periphery with a center or curvature at said pivot axis to movably fit within and maintain said top wall opening closed in all rotative positions of said planar operating member, and a handle fixed to the upper side of the second part of said planar operating member.

9. A sash lock as defined in Claim 8 including a peripheral flange on said planar operating member second part underlying said top wall edge.

10. A sash lock as defined in Claim 8 wherein said locking cam is rotatable on said planar operating member and has three lobes with one of said lobes being operative to exert an outward push on said keeper.

11