US2226346A - Window lock - Google Patents

Description

J. A. MUSSMAN Dec. 24, 1940.

WINDOW LOCK Filed Sept. 2'7, 1938 2 Sheets-Sheet 1 E m! I.

Filed Sept. 27. 1938 A. MUSSMAN WINDOW LOCK '2 Sheets-Sheet v22 Patented Dec. 24, 1940 UNITED STATES PATENT. OFFlCE. 2,226,a4s p wINnowLooK Jacob A. Mussman, Portsmouth, Va. Application september 27, 1938, Serial No. 231,965

8 Claims.

This invention relates to improvements in window locks, particularly for the most commonly known type of window which comprises bottom and top sashes. Persons who are in the habit of lowering the top sash for ventilation often lay themselves open to the entry of thieves into the room because of the lack of means to secure the bottom sash. The same danger accompanies the iaising of the bottom sash. 0 One of the outstanding principles of the invention is concerned with making it possible for a person to either raise the bottom sash or lower the top sash for the purpose of ventilation, or to both raise and lower the two sashes for the maintenance of a circulation of air and to do this with the utmost safety. With this preamble in mind, the objects of the invention are as follows:

First, to provide a window lock which is adapted to secure the bottom and top sashes of a window in both open and closed positions,. and in such a relative adjustment that ventilation can be had without the danger of an unwanted person making an unlawful entry into the room.

Second, to provide a window lock with which the bottom and top sashes can be secured together and yet be slidable in the window frame. Other objects and advantages will appear in the following specification, reference'beinghad toithe accompanying drawings in which:

Figure 1 is a front elevation of. a pair of window sashes illustrating the applicationof theimproved window lock, a portion of the window frame being shown in section.

Figure 2 is a sectional perspective view of the bottom and top sashes, together with a portion of the window frame, the invention being illustrated more in detail.

Figure 3 is a vertical section on the line 33 of Fig. 2.

Figure 4 is a detailed cross section taken on the line 4-4 of Fig. 3.

Figure 5 is a horizontal section taken substantially on the line 5--5 of Fig. 3.

takensubstantially Figure 6 is a perspective view showingthe hasp and hinge plate of the lock swung up to more clearly illustrate the internal structure.

Figure '7 is a detail perspective view of :the hinge leaf and knuckle to which the hinge plate is secured.

Figure 8 is a detail plan view of the base. I Figure 9 is a cross section taken on the line 9--9 of Fig. 8. v y

In Fig. 1 the bottom and top sashes are designated l and 2, the top rail of the former being designated 3, and the left upright stiles of the two sashes being designated 4, 5. The window frame is only fractionally shown at 6 and is here illustrated as being bored with a single hole "I.

Thewindow lock generally designated 9 (Fig. 2.) comprises two main parts which are attached 5 to the respective stiles l, 5. The part it! oft-he former, comprises what in effect is a rack. But unlike'an ordinary toothed rack the projections I l are cross sectionally square. Thatis to say, opposite sides are parallel :so that when the companion part of the window is set there will be no danger of a separation as would be the case were the projections formed like ordinary rack teeth. The'rack l0 comprises a strip of metal, as can be seen, so bentas to form the projections l I. At this point it is desired to state that the use of the invention is not restricted to the specific type of projections shown. The later might be in the form of straight-sided studs or lugs of varims-configurations and it is believed that such an arrangement is easily visualized without having-toadd an illustration. The rack II] is secured to the-stileB by screws IE or some appropriate equivalent. The companion part of the window lock comprises the following structure; a base a generally designated l3, includes an apron l4 which is applied to the front face of the stile 4 when the base is set on top of the rail sand is th ur d by a plurality of screws l5. The 0 apron M has a keeper l6.

Thereis an extension I? of the apron 14 upward from the floor IQ of the base (Figs. 3 and 9). The inner surface of this extension is either beveled or rounded at I9 so that the resulting edge 3 5 is fairly sharp. This is not a cutting edge nor is it blunt. It is simply sharpened to constitute a detent for the hasp (Fig. 3)

A depression 2| in the floor l8 (Figs. 3 and 9) provides a track for a slidable bolt 22. A pair of 5 0 spaced lugs 23, 24, wall the bolt in on one side, the upturned portion 25 of the floor i8 walling the bolt in onthe other side, said portion being formed into a stationary hinge knuckle 26 which overlies the bolt passage and completes the guid- '45 ing arrangement therefor (Fig. 9). In addition to'securing the base I 3 by'means of the screws l5, other screws 21 are driven into the window sash through holes 28 in the floor It. The latter is I extended beyond the apron It at 29 (Fig. 3) but thisex'tension'is cut out at 333 so as to match the rope slot ill in the bottom sash (Fig. 6).

An upstanding wall 32 provides a partial closure for one end of the base l3. This wall merges into I a circular enlargement 23 which matches an adjacent knuckle 26 in shape. The main purpose of this wall is to brace the extension IT.

The previously mentioned bolt 22 has a knob 34 by which the bolt is slid back and forth on its track 2|. This knob works in the space between the lugs 23, 24 (Fig. 6) and these lugs limit the movement of the bolt to the locking and unlocking positions. The knob is equipped with a stud 35 which is adapted to enter and occupy either one of a pair of holes 36, 31, in the leaf 38 (Fig. 7) of a hinge knuckle 39. When the knob 34 abuts the lug 23 the stud 35 is in registration with the hole 36, and when it abuts the lug 24 the stud is in registration with the hole 31.

A pin 40 connects the hinge knuckles 26, 39. The hinge plate 4| of an articulated locking member 42 is secured to the leaf 38 by rivets 43. The locking member includes the hasp 44, the hinge plate 4| and hasp being joined by a hinge connection 45 as shown.

A slot 46 in the hasp 44 fits upon the keeper l6 when the locking member 42 is swung down (Figs. 2 and 3). A look 47 is then applied to keep the locking member in its locking position. The hasp 44 has at least one tang 48 struck up from it (two tangs being shown). These tangs define a recess 49 in which the extension I! is adapted to fit (dotted lines, Fig. 3) in order to support the locking member 42 in the bowed position. The reason for this provision is this:

It will be noticed that the hinge plate 4| is so secured to the leaf 38 as to extend beyond the hinge 25, 39 (Fig. 3). This extension provides a locking element 5|] which is adapted to engage the space between a selected pair of the projections thus making said locking element a rack-engaging part. The distance from the axis 5| of the hinge pin 40 to the extremity 52 of the element 50 is such that when the locking member 42 is set in its locking position (full lines, Fig. 3) the extremity 52 will jam against the rack l0 and tighten both sashes against their guide strips 53, 54 (Fig. 2). Thus the need for the detent 20 and recess 49 will be understood. When moving either sash -it is necessary to get the locking element 50 out of the way by standing and holding it in the dotted line position (Fig. 3).

The operation is readily understood. In Fig. 1 the hole 1 is of first importance. This hole is so bored into the window frame 6 that the bolt 22 can be projected into it when the bottom sash is raised say six inches from the sill. The bolt and hole are used only when it is desired to make the total window opening more than six inches. For instance, if it is desired to raise the bottom sash six inches and to lower the top sash six inches, use will be made of the bolt and hole to lock the bottom sash at the six inch level and the locking device 42 will be used to lock the top sash six inches down. Otherwise it would be possible to raise the bottom sash a total of twelve inches, and this opening would be large enough for an outsider to creep through.

But if the bottom opening is 6" and the top is not open at all, or the bottom is open 4" and the top 2", it is still unnecessary to use the bolt, for by raising both windows the total opening would still not be more than 6". The bolt is not to be used for locking both sashes tight; the hinge plate and rack will do that. The rack is so designed and so placed on the upper sash that the hinge plate will engage at exactly a 6" opening of bottom window. The hole in the frame is also to be at that point and so will the registrable markers on window frame and bottom sash. Another reason why the hole should not be below a 6" opening of the bottom sash is that it might run into the cut-out which is taken out when a new sash-cord is installed.

Provision is made of a pair of registrable markers 55, 56, respectively on the window frame and on the bottom sash'l (Fig. 2). It is possible to feel when these markers are in registration without illuminating the room and when they are the occupant can throw the bolt 22 so that it enters the hole 1 and secures the lower sash in the desired raised position.

The next act is to lower the top sash 2 if top ventilation is desired. If it is not desired then the locking member 42 can be manipulated to secure both sashes, the rack I0 extending down to the cross rail of the top sash.

In either case the turning of the locking member 42 from the dotted line position (Fig. 3) to the full line position will elevate the locking element 50 to its jamming position against the rack I 0. The hasp 44 is lowered over the keeper l6 and the lock 41 is applied. Any possible movement of the top sash 2 is then limited to the distance between a pair of the projections. The top sash cannot be moved beyond these limitations, and the bottom sash cannot be moved at all, the engagement of the bolt 22 with the hole 1 preventing such movement.

It is not possible to shift the bolt 22 back while the parts are thus locked, because when the hasp 44 is swung down, the stud 35 will enter the hole 36 and thus lock the bolt. The bolt 22 also figures indirectly in looking the two sashes in their fully closed positions. At such a time the bolt is retracted until the stud 35 registers with the hole 31. The locking member 42 is lowered and secured with the lock 41, and inasmuch as the element 5!] is then in engagement with the rack l0 it is impossible to move either sash because it is intended that the element 50 shall engage immediately below one of the projections I claim:

1. A look comprising a part attachable to one sash of a window, the other sash being adapted to have rack means substantially full length thereof, said part consisting of locking means movable into locking engagement with the frame in which the sashes are movable, and a unitary jointed locking member also included in said part being foldable upon itself to both engage and secure the respective locking means in the frameengaging position and at the same time to engage said rack means anywhere within its length to render both sashes substantially stationary in any position of relative adjustment.

2. A look comprising a part attachable to one sash of a window, the other sash being adapted to have a rack, said part including a bolt which is movable into locking engagement with the frame in which the sashes are movable, and a locking member also included in said other part being movable to secure the bolt in its frame-engaging position and at the same time over-reach the bolt to engage the rack at a selected position of adjustment of the respective sash thus to render both sashes substantially stationary.

3. A look comprising a part attachable to one of a pair of sashes of a window, said part including a bolt which is movable into locking engagement with the frame in which the sashes are movable, a stud on said bolt, and a locking member included in said part being movable to fit down over the stud to hold the bolt in its frame-engaging position and at the same time reach across to jam against the other sash thus to render both sashes substantially stationary.

4. A look comprising a part attachable to one of a pair of sashes of a window, said part comprising a base, a bolt slidable on the base into looking engagement with the frame in which the sashes are movable, and a locking member included in said part, having two hinged portions, one of said portions being adapted to grip and hold the bolt in its frame-engaging position, the other portion comprising a hasp to jam against the sash.

5. A lock comprising a part attachable to one of a pair of sashes of a window, said art including a base having a depression and adjacently upstanding spaced lugs and another upstanding portion forming a bolt track, a bolt slidable in said track into locking engagement with the frame in which the sashes are movable, said bolt having a knob working in the space between the adjacently upstanding lugs and said knob having a stud, a leaf hinged to said other upstanding portion, having a hole to receive the stud when said leaf is swung toward the bolt thus to secure the bolt in its frame-engaging position, and a hasp hingedly carried by the leaf being then jammed against said other sash thus to render both sashes substantially stationary.

6. A look comprising a part attachable to one of a pair of sashes of a window, said part including a base with a detent, a bolt slidably carried by said base and adapted to make a locking engagement with a window frame, an articulated locking member which is movable into a position to secure the bolt in its frame-engaging position and including a locking element to then engage rack means on the other sash and secure both sashes from movement, and means on the locking member adapted to receive the detent when the locking member is moved to an inactive position, whereupon said locking element is retreated from the rack means, thus allowing relative movement of the sashes.

"7. In a look, a base adapted to be secured on top of a sash, said base having an apron applicable to the front of the sash, said apron having an extension above the base providing a detent, a bolt on the base, means embodied in the base providing a track for the bolt, a portion of said means constituting hinges knuckles, a stud upstanding from a portion of said bolt, a leaf hinged to said knuckles and having an opening to receive the stud when the bolt is in its locking position, said leaf being swingable upwardly to release the stud and allow retraction of the bolt, and a hasp hinged to the leaf adapted to overlie the apron and grip the bolt in its securing position, said hasp being swingable upwardly into a bowed position upon retraction of the bolt, and having at least one tang defining a recess to receive the detent and temporarily support the beep and leaf in a bowed position.

8. A lock comprising a rack securable to one of a pair of window sashes, a bolt sl'idably carried by the other one of said pair of sashes and adapted to assume either of two positions in one of which it is extensible into locking contact with engageable means on a frame containing the sashes, said engageable means being spaced up from the sill a distance greater than the height of said other sash so as to secure said sash in a raised position, and an articulated locking member also carried by said other sash, said member including a rack-engaging part adapted to engage the rack and at the same time cooperate with the bolt to retain it in one of its positions, said member also including another part adapted to be retained in a secured position to retain said rack-engaging part in the securing position.

JACOB A. MUSSMAN.

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