US2015456A

US2015456A - Window latch

Info

Publication number: US2015456A
Application number: US684574A
Authority: US
Inventors: Adrien R Mellor
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-08-10
Filing date: 1933-08-10
Publication date: 1935-09-24
Anticipated expiration: 1952-09-24

Description

fff 24g n AR. MELLOR MESAS@ WINDOW LATCH Filed Aug. 10, 1933 bolt on the bottom railv of an Patented Sept. 24, 1935 untreuY smrss OFFICE 1 Claim.

The invention relates to a latch for frames of screen windows and storm windows, and has for its principal object the provision of a latch that will automatically catch and hold a latch outside screen window frame or frame of a storm window, and that is so constructed that the latch cannot be operated when the lower sash of the window casing is in its lowered position, and the operating means is also contained within an open ended casing, so that operation of the latch to release the window frame cannot be accomplished from the outside of the house whether the lower sash is closed or open.

A further object of the invention is the provision of a latch of the type referred to that is reasonable in cost of manufacture, that is simple in operation, and that is effective in providing a latch for the purpose stated.

The invention will be described in detail hereinaiter and will be found illustrated in the accompanying drawing, in which Figure l is a fragmentary view of a window casing and lower sash and the bottom rail or a screen or storm window frame, showing the latch in position relatively thereto, the parts being shown unlatched.

Figure 2 is a view similar to Figure l with the latch member shown in section, and the parts being shown in latched position,

Figure 3 is a front View of the latching mechanism, i

Figure 4 is a rear view,

Figure 5 is a vertical sectional view on a plane indicated by the line 5-5 of Figure 1,

Figure 6 is a horizontal-sectional view on a plane indicatedby the line 6--5 of Figure 3, and

Figure 7 is a detail view in elevation of a modified construction of latch bolt.

In the drawing similar reference characters are used to designate corresponding parts in all of the views.

In the -drawing is shown a window casing A in which is mounted the usual sliding window sash B, and shown in connection therewith the frame of a storm window or screen window C, the sill D of the casing being inclined outwardly and downwardly from the lower sash B, the usual practice to shed rain water.

Secured to the bottom rail of the frame C is a latch bolt Il) that is provided with a threaded stem Il, the sides of the latch bolt lll being flattened as shown at i2 to receive the jaws of a wrench for fastening it in the frame. The extremity of the latch bolt lil is tapered as shown at i3, and said tapered portion on the under side ends with a recess or depression I4 to be engaged by a latching member to be hereinafter described. In Figure 7 the latch bolt indicated at Illl and having a threaded stem Il is provided with a polygonal shoulder I2' in lieu of the flattened side i2 hereinbefore described, to receive the jaws of a wrench in turning the bolt.

The means for engaging the latch bolt lll is enclosed within a housing i5 having a substantially U-shaped wall iii, the side portions of said U-shaped wall being divergent as shown at ll. The lower edges of the side walls il are turned outwardly as shown at i8 and returned under the portions i3 as shown at i9 to clamp a base plate 2t therebetween. The base plate 20 and parts i8 and i9 are provided with registered openings 2i tol receive screws or other driven fastenings 22 to secure the casing in position on the window sill D, as shown, and-the lower wall of the casing is inclined slightly as shown in Figures 1 and 2 to conform to the inclination of sill D, so that theV remainder of the casing will be in vertical position when secured, and the inner end of the casing which is open, as shown at 23, will snugly engage the lower rail of the lower sash B to prevent operation of the latching members inside of the casing, that will be hereinafter described, when the lower sash is in a closed position.

The base plate 2Q has an upturned portion 25 that provides a wall closing the outer end of the casing l5 and said wall 24 has an opening 25 therein te receive the laten bolt le when the frame member C is in a closed position as shown in Figure 2. In order to hold the latch bolt in a latched position, there is provided a latching plate 26 having an opening 2l therein that registers at times with the opening 25, the lower wall of the opening 21, designated 28, by engaging in the recess lli locks the bolt in engagement in the casing and the window frame C in closed position. Plate 26 is slidably mounted between grooved guides 29 secured to the wall 25, and the plate 26 is provided with a ange 3d that is engaged by a helical spring .3i of expansible type and that serves to normally hold the plate in engaging position as shown in Figure 2. The helical spring as shown has been selected for illustration, but it will be apparent that any other type of eX- pansible spring may be substituted thereor without changing the spirit of the invention.

32 is a partition in the casing i5 that is connected to the wall 2t by means of brace members 33, and the partition 32 has an oifset forming a shoulder 34 intermediate of its upper and lower v ends, said shoulder 31% providing a stop to limit the movement of the plate 25 under the impulse of the spring 3i. Journaled in the wall 24 and partition 32 is a shaft 35 on which is secured a cam St, that when the shaft 35 is rotated, engages the plate 2t to move the plate. toward the position for registration of the opening 21 therein with the opening 25 in the walli, and to release the latch bolt l0 when in a latched position, 31 is a knurled head on the shaft 35 for manual turning of the shaft as stated.

It is to be understood that the invention is not restricted to the precise or exact arrangement of parts illustrated and described, as details of construction may be modified and rearranged Y mounted on said end Wall and over said opening, and having an opening therein to aline with the opening in the Wall, an'angularly related flange on said plate, an expansible spring engaging said ange to normally hold the plate in latching position, a partition in said housing having an oiset providing a shoulder to engage said flange and limit the movement of said plate to latching position, a shaft rotatably mounted in said partition and end wall, and a cam on said shaft to engage the latch plate and move it against the tension of said spring with the opening therein alined with the opening in the end wall.

ADRIEN R. MELLOR.