US1721750A - Window fastener - Google Patents

Description

ul 23, 1929. c, STROM 1,721,750

I WINDOW FASTENER Filed Dec. 5, 1927 Imam-ma cam Patented July 23, 1929.

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Application filed 'fleceinber 5, 1927. Serial No. 237,345.

The obejct of this invention is to devise a window fastener of the type described which may be quickly and easily constructed for sale at a low price which is simple of construction and effective and reliable in operation.

I attain my obejct by constructing the fastener in the following manner. The base is made of stamped metal provided with lugs on either side thereof having screw holes therein through which screws are adapted to pass to secure the fastener to the window frame adjacent the window. A channel is stamped out longitudinally of the base and at the end of the base remote from the lugs two arms are pivoted. These arms are of stamped metal construct-ion bent at right angles at the ends to form engaging surfaces for the window sash. These engaging surfaces are broad and slightly curved to prevent damage to the window sash while at the same time firmly engaging the same. A spreading member is pivoted to the top of the channel between the arms and is adapted to force the arms apart and out of engagement with the sash when the fastener is in position. A straight spring passes through the sides of the channel adjacent the pivotal point of the arms and is secured at either end to one of the arms adjacent the engaging surface.

thereof. This spring tends to force the arms together and into engagement with the sash when the fastener is in position.

The construction is hereinafter described and illustrated in the accompanying drawin 's in which 7 Fig. 1 is a plan view of the device in locking position Fig. 2 is a plan view of the device in its inoperative position Fig. 3isaplan view of the base of the device removed from the window frame with the arms thereof in their extended position, and

Fig. 4 is an end view of the device showing the arms in their closed position.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

The base 1 is made of stamped sheet metal provided with lugs 1" on either side thereof having screw holes 1 therein through which screws 2 are adapted to pass to secure the fastener to the window frame 3 adjacent the w ndow sash 41;. A rib 1 is stamped out longitudinally of the base and at the end of the base remote from the lugs two arms 5 and 6 are pivoted by means of a pin 7 to outside of the bottom of the channel. These arms 5 and 6 are of stamped metal construction bent at right angles at the ends to form engaging surfaces 5 and 6 adapted to engage the window sash. These engaging surfaces are comparatively broad and extend transversely of and parallel to the sash, their engaging surfaces being curved convexly in the direction of the length of the window. This construction prevents damage to the window sash while at the same time adequately engaging the same. A spreading member 8 is pivoted to the top of the rib between the arms 5 and 6. This member is also of stamped metal construction and comprises a pin 8 on which it is pivoted, a lower portion 8 adapted to en gage the arms 5 and 6, and a winged upper portion 8 adapted to be grasped by the finger to turn the spreading member to force the arms 5 and 6 apart and out of engagement with the sash l when the fastener is in position.

A bent wire spring 9 passes through apertures 1 in the walls of the rib 1 adjacent the pivotal'point of the arms 5 and 6 and passes beneath both arms to point adjacent the en gaging surface of either arm where its ends are secured by being bent around the outer edge of each'arm. This spring tends to force the arms together and into engagement with the sash when the fastener is in position.

The operation of the device is as follows.

It is screwed to the window frame adjacent the sash in such a position that when the arms are spread apart they are out of engagement with the window sash and when they are forced together by the spring they are both in engagement with the sash. WVhen opening or closing the window the spreading engagement with the sash. The window'is' thus held in position because any movement thereof upwards or downwards would tend to jam the upper or lower arm respectively with the sash. 1

ItQwill be seen that the stamped rib not only provides a convenient part to which the spreading member and arms may be pivoted,

but it. also provides accommodation for the bent Wire spring and supports the arms out of frictional Contact with the base or the frame of the Window.

From the above description it will be seen that I have satisfactorily attained the objects of my invention. The details of the construction may be varied Without departing from the spirit of my invention.

hat I claim is:

A Window fastener adapted to be applied to a Widow having a frame and sash comprising a sheet metal base adapted to be secured to the Window frame 'and having a rib stamped therein, the rib having apertures spring being secured to the ends of the arms and being adapted to draw the arms together and into engagement with the sash; and a stamped metal spreading member pivoted to the riband adapted to spread the ends of the arms apart and out of engagement with the sash.

Signed atSt. Catharines, Ontario, Canada, this 23rd day of August, 1927.

' CARL STROM.

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