US2137937A

US2137937A - Automatic window lock

Info

Publication number: US2137937A
Application number: US186887A
Authority: US
Inventors: Berghoff Frank
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-01-25
Filing date: 1938-01-25
Publication date: 1938-11-22
Anticipated expiration: 1955-11-22

Description

Nov. .22, 1938.

F. BERGHOFF 2,137,937

AUTOMATIC WINDOW LOCK Filed Jan. 25, 193-8 4 6 l /.3 M //7 9 I WITNE SS ATTORNEYS Patented Nov. 22, 1938 AUTOMATIC WINDOW LOCK Frank Berghoff, La Fayette, Ind.

Application January 25, 1938, Serial No. 186,887

1 Claim.

This invention relates to automatic window locks and has for the primary object the provision of a device of this character which when properly mounted on a lower slidable sash of a window will coact with the upper slidable sash to secure the sashes from being opened and embodies a construction whereby the device may be held inoperative whenever it is desired to open either of the sashes and will permit the sashes to be closed without rendering said device inoperative.

With these and other objects in View, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a side elevation, partly in section, illustrating an automatic window lock constructed in accordance with the present invention and showing the same mounted on a lower sash and held in an inoperative position and prevented from coacting with the upper sash in securing the sashes against being opened.

Figure 2 is a sectional view showing the device coacting with the upper sash in preventing further opening of either sash.

Figure 3 is a front elevation illustrating the I device.

Figure 4 is a side elevation partly in section showing the securing roller of the device retained in an inoperative position.

Referring in detail to the drawing, the numeral I indicates a base plate secured on the upper rail of a lower sash 2 of a window and has integra1 therewith upstanding arms 4. Integral with the base I and the arms 4 is a wedge plate 5 tapering towards its upper end. The arms 4 have formed therein slots 6 each having an up wardly inclined branch I and a horizontally disposed branch 8. The branches I substantially parallel the front face of the wedge plate. A pintle 9 slides freely in the slots and has secured thereon a yieldable roller l constructed of rubber or any other material suitable for the purpose. As long as the pintle 9 occupies the branches l of the slots the roller has peripheral contact with the upper sash ill of the window and the wedge plate so that should an attempt be made to raise the lower sash or lower the upper sash wedging of the roller between the wedge plate and the upper sash will take place preventing movement of said sashes for the purpose of opening the window.

vice.

A shoulder M is formed on the rib [2 to engage the lever for retaining the pintle 9 in the branches 8 of the slots 6. The securing device described is rendered inoperative by the positioning of the pintle 9 in the branches 8 of the slots 6 and retained in this position by the lever engaging the shoulder l4.

However, when the lever is disengaged from the shoulder M the pintle 9 moves into the branches 1 of the slots and comes in contact with the'upper sash and the wedge plate so that any attempt to open either of said sashes will be prevented by the wedging action of the roller on the upper sash and the wedge plate.

A securing device of this character can be rendered operative in any of the positions that the sashes may be occupying to prevent further opening of said sashes.

What is claimed is:

An automatic window lock comprising parallel supporting arms, a base connecting said arms and adapted to be secured to a lower sash of a window, a wedge plate carried by said arms and base, said arms having slots and each slot including upwardly inclined and horizontally disposed branches, a pintle operating in said slots, a yieldable roller carried by the pintle to have contact with the wedge plate and an upper sash of the window to effect securing of said sashes against being opened, a lever pivoted on said pintle for moving said pintle into the horizontally disposed branches and thereby effect disengagement of the roller from the upper sash to free said sashes for opening, a reinforcing rib between the wedge plate and the base and having a notch to be engaged by the lever for retaining of the slots.

disposed branches FRANK BERGHOFF.