US1724637A

US1724637A - Sash latch

Info

Publication number: US1724637A
Application number: US216577A
Authority: US
Inventors: Roy H Bergstrom
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-08-31
Filing date: 1927-08-31
Publication date: 1929-08-13
Anticipated expiration: 1946-08-13

Description

Aug- 13, 1929- v R. H. BERGSTROM 1,724,637

SASH LATCH Filed Aug. 51, 1927 Mmc MMM

Patented Aug. 13,1929.

UNITED STATES ROY H. BERGSTROM, 0F LOS ANGELES, CALIFORNIA.

SASH LATCH.

Application filed August 31, 1927. Serial No.` 216,577.

This invention relates to improvements in sash latches.

An object of the invention is to provide an improved sash latch which is adapted to be mounted upon one of two sash movable relatively to each other, which will serve to rlimit the relative movement between the sash so that they can not be opened from the outside.

Another object of the invention is to provide a sash latch for the above mentioned purpose which will take care of itself so that it is normally in that position which will limit the relative movementbetween the sash so thatv it; is not necessary to manipulate any part in order to hold the sash against relative movement. The improved sash latch however, can be moved into such position from the inside as to perm'itthe relative movement of the sash.

A further object ofthe. invention isy to provide an improved sash latch which is self-actuated on moving the sash from open position to closed position. f

Another object of the invention is to pro`- vide a sash latch of novel, simple and durable construction.

With the foregoing and other objects in view, which` will be made manifest in the following detailed description vand specilically pointed'- out in the appended claims,A

reference is had to 'the accompanying draw.- ings for an: illustrative embodiment of the invention, wherein: i

Figure 1 is a partial view in perspective of two sash, illustrating the improved sash latch as having been mounted thereon. Fig. 2 is a vertical section.v taken substantially upon; the line 2-2 upon Figure l, illustrating the sash in ful-ly closed position before the sash latch has become operative.

Fig.v 3 is a view similar toFigure2, illustrating the manner` in which the latch limits the relative movement between'the sash.'

Referring to the accompanying drawing `wherein similar reference characters designate similar parts throughout, the frame of the window is indicated at F, in which there are two sash, S and S. Tlhese window sash are vertically slid-able in the window frame and the;y sash S is shown as havin-g a stile 10 and a bottom rail 11,'while the lower sash S has a top rail- 12 and a stile 13. The sash latch consists of an open sided housing 1&1 which is adapted to be recessed in the stile 10 of the upper sash. This housing is somewhat deeper at the bottom than at the top and has an apertured flange 15 about its open side to receive screws 16 by which it may be attached to the stile 10. A pin 17 extends transversely across the housing and serves to pivotally mount a latch member 18 which has a s-lot 19 through whichl the pin extends. The latch member, whenv in the position .shown in Figure 2, presents an outwardly and downwardly inclinedA outer surface 20, a rounded bottom surface 21 and a shoulder 22 on its inner surface which, when the vlatchV member ismoved into the position shown in Figure 3, forms a horizons tal abutment. vThe formation of the latch member is such that it normally pro-jects a short distance throughv the open side of the housing due to gravity. To insure the latch member assuming suchnormal position, a

. small leaf spring 23 is fastened tothe back of the housing `and is engageablewith the latch member to keep it in this position.

' The back and top walls of the housing are so positioned that when `the latch member is swung into the upper position, the edge 24e will bear against the back and top walls of the housing so as to limit the movement ofthe latch member int-wo directions when the latchY member is in its upper or locking. position. Such bearing engagement between the 'edge 24' and the back and top walls is permitted by the pin and slot connection at 17 and'19;

Y rEhe operation of the improved sash lock is as follows:

` The'latch member being in the position shown in Figures 1 and 2, if either ofi the sash. should be started from the closed position to the open position, the latch. inem .ber will have its bottom surfaces 21 engage the top surface-ofthe rail 12 onthe lower sash S. A further movement causes theA latch member 18 to swing upwardly from the position shown in Figure 2y to the dotted line position shown on this figure or the full line position shown in .Figurel In suchpositionthe shoulder 22 forms' theA hor'izontal abutment which is adapted to be engaged by the topY surface of the rai-1l 12,

limiting the relative movement betweenthe sash. In such position any force imparted to either of the sash to force the sashf open will` be transmitted by the latch member to the back and top walls of` the housing, 14

so that all-strain on the pin 17 is eliminated.

If it is desired to open the sash, this can be accomplished by forcing the latch member inwardly againsty the action of the spring 23 so that the latch member will be entirely contained within the housing. Vhile in such position the lower sash S can be started upwardly or the upper sash S can be started downwardly, and after the edge l24. has passed beneath the top surface of the rail 12, the latch member will be kept within the housing by its engagement with the outer side of the stile 13. When the sash are subsequently moved into closed position, the latch member y18 is caused to swing outwardly into the position shown in Figure 2. If desired, a protecting plate 25 may befastened over the top surface of the rai1'12 and down over the outer surface of the stile 18 to prevent the latch member `from marring or scratching the lower sash. From the above described construction it willbe appreciated that it is not necessary to manipulate the latch in order to have it hold the sash against material relative movement.` Whenever the sash are moved into their closed positions, the latch acts automatically to move into locking posit-ion.

' The improved sash latch is not limited in of the invention use to the exact position shown. If the window has merely the lower sash slidable, the sash latch can be mounted either upon the upper stile 10 or on the window frame F so as to engage the top rail 12 of the lower sash S in a manner similar to that as above described. It will thusbe seen that a novel, simple, durable and advantageous sash latch is provided which can be easily and quickly installed, and which may have an attractive appearance. Y l

This sash latch is, especially intended for permitting the lower or upper sash to be raised or lowered respectively for ventilation and yet preventing t-he unauthorized furtherV opening of the sash from-the outside,thusv being in a sense a burglar proof device. y Y It will be understood that various changes inthe details of construction may be made Vwithout departing from the spirit or scope as defined by the appended claims. I

I claim: Y Y

`1. A sash latch comprising an open Vsided housing, a latch member 'pivoted within the housing and capable of being swung through Vthe open side thereof,jsaid latch member normally assuming a position partially projecting from the housing but beingcapable Vof beingY moved into a position wholly within the housing Y or into another position wherein 1t partially projects from the housmg, s aid latch member in the last mentioned posltion bearing against walls of the housing s0 as to take the strain oit' the pivot when a force is applied to the latch member. i

2. A sash latch comprising a/housing having an open side, a latch member mounted within the housing and having a in and slot connection therewith, said latc member normally assuming a position projecting from the housing but being capable of being moved into a position wholly within the housing or into a locking position projecting from the housing, said latch member being adapted to bear against the top and back walls of the housing when in such position as and for the purpose described.

3. A sash'latch comprising a housing having an open side, a latch member mounted within the housing and having a pin and slot connection therewith, Ysaid latch member normally assuming a position projecting from the housing but being capable of being moved into a position wholly within the housing or into a locking position projecting from the housing, an means yengageable by the latch member to limit its movement in two directions when in the last mentioned position as and for the purpose described.

4. A sash latch comprising an open sided housing, -a latch member mounted for movement within the housing, said latch member being capable of being swung upwardly through the open side of the housing into a locking position but normally assuming a lower position partially projecting from the housing, said latch member presenting a downwardly and outwardl inclined surface in such position, a roun ed bottom surface and a shoulder on its inside surface adapted to form a horizontal abutment projecting from the housing V'when theVr`v latch member is in locking positionfsaid latch member being adapted to-'bear against the top and back walls of the housing when in locking position. e

5. A latch for a pair of window sash one of which at least is movable relatively tothe other, comprising means providing a pivot on one of the sash, a latch member mounted upon said pivotandV normally disposed on that side of the pivot most adjacent the other i pivot on one of the sash, a latchumember relative movemounted upon said pivot and normally dis- Y j posed on that side of the pivot most adjacent the other sash and in a position Wherein it will be engaged by said other sash upon relative movement between the sash, said latch member being capable of being moved by said other sash to a position on the opposite side of the pivot and presenting a shoulder in such position adapted to be engaged by said other sash s0 as to prevent further relative movement between the sash,-

and means upon which the latch member may engage in the last mentioned kposition so as to take some of the strain from oil' the pivot.

7. A latch for a pair of window sash one of which at least is movable relatively to the other, comprising means providing a pivot on one of the sash, a latch member mounted upon said pivot and normally disposed on that side of the pivot most adjacent the other sash and in a position wherein it will be engaged by said other sash upon relative movement between the sash, said latch member being capable of being moved by said.- other sash to a position on the opposite side of the pivot and presenting a shoulder in such position adapted to be engaged by said other sash so as to prevent further relative movement between the sash, said latch member being capable of being moved into a position to permit relative movement between the sash.

8. A sash latch comprising an open sided housing, means providing a pivot at approximately the center of the housing, a latch member mounted upon said pivot normally assuming a position partially within the mately the center of the housing, a latchV member mounted upon said pivot normally assuming a position partially within the housing on one side of the pivot and partially projecting through the open side thereof, said latch member being capable of being swung through the open side of the housing on the opposite side of the pivot from the first mentioned position, said latch memberl presenting an outwardly extending shoulder extending outwardly from the open side of the housing when in the last mentioned posi# tion and a leaf spring mounted in the housing engageable upon` the latch member and assuring its being partially projected from the housing, when in the first mentioned position by permitting the latch member to be forced into a position wholly within the housing.

In testimony whereof I'have signed my name to this specification.

R. H. BERGSTROM.