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Publication numberUS2503370 A
Publication typeGrant
Publication dateApr 11, 1950
Filing dateJul 3, 1946
Priority dateJul 3, 1946
Publication numberUS 2503370 A, US 2503370A, US-A-2503370, US2503370 A, US2503370A
InventorsZanona John
Original AssigneeZanona John
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Forget-proof window lock
US 2503370 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

April 11, 1950 J. ZANONA 2,503,370

FORGET-PROOF WINDOW LOCK Filed July s, 1946 2 Sheets-Sheet 1 F l G 2 T T INVENTOR.

JOHN ZANONA ATTEI RN EYE April 11, 1950 I J. ZANONA 2,503,370

FORGET-PROOF WINDOW LOCK Filed July 3, 1946 2 Sheets-Sheet 2 'IN VEN TOR.

Mmmmm 36 4 J H N Z A N ON A 6 /5 I I ATTD R N EYS Patented Apr. 11, 1950 UNITED STATES PATENT OFFICE FORGET-PROOF WINDOW LOCK John Zanona, Vulcan, Mich.

Application July 3, 1946, Serial No. 681,284

My present invention relates to an improved forget-proof window lock and more particularly to the type of window lock or latch which is releasable manually to open the lower window sash and which is provided with tripping means for automatically setting the latch in looking position when the sash is lowered to closing position.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention according to the best mode I have thus far devised but it will be understood that various changes and alterations may be made in the exemplified Structure within the scope of the appended claims.

In the drawings:

Figure 1 is a vertical sectional view of a window frame showing the latch in looking position.

Figure 2 is a similar view showing the latch unlocked.

Figure 3 is a horizontal sectional view at line 3-3 of Figure 2.

Figure 4 is a front elevational view showing the latch in locked position.

Figure 5 is a detail view of the latch mechanism; and.

Figure 6 is an elevational view thereof.

Figure 7 is a perspective view of the latch bar adapted to be mounted on the upper window sash.

Referring now to the drawings in detail, I have illustrated the window lock or latch of my invention as embodied in the window frame 2 having an upper sash 4 and a lower sash 6, each having a pane P.

A catch 8 having attaching holes l0 and an angular lug I2 is secured to the upper sash near the bottom thereof as illustrated.

The latch mechanism comprises a toggle arrangement including the base l3 having open vertical supports I4 and secured to the upper edge of the lower sash. A pin 26 pivotally supports latch I8 which is formed of substantially triangular shape and having a finger release 20 at one angle, a lock 22, at a second angle, and a trip 24 at the third angle.

A lever 28 depends from the latch and is formed with an open center 30 and a cross bar 32 adapted to engage the inner edges of the supports M. A collar 34 having spaced prongs 36 which engage on either side of the cross bar, is seated in the upper end of a coil spring 38 which is secured on the lug 40 on the base l3.

In operation, the finger release 28 is depressed to pivot the latch against the tension of the spring to place the trip 24 in operative position, and the lock 22 out of position. As the lower sash is elevated the trip 24 will abut the lug l2 1 Claim. (Cl. 292-498) on the upper sash and will as it passes pivot the latch l8 placing again the lock 22 in position to engage the lug l2 as the lower sash is lowered to close the window.

In so doing the lock 22 will ride over the lug against the tension of the spring without tripping or pivoting the latch to the point where the spring will retain the pivoted latch in off position, and if the lower sash is again subjected to upward movement the lock will abut the lug and prevent such movement until the finger release is depressed and the latch tripped.

The spring is so positioned on the base to press against the lever of the latch to permit relative movement of the latch against the tension of the spring to a certain point whereupon the toggle eiiect will follow and the latch will be set in position to be tripped as seen in Figures 2 and 5.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

A window sash lock comprising a base having open vertical supports laterally spaced from one another, said base being adapted to be connected to the upper edge of a lower window, a latch pivotally connected between the vertical supports, said latch having a finger release extending at one angle, a lock finger extending at another angle, a trip projection extending at a third angle and a lever extending at a fourth angle, said lock finger and said trip finger being adapted to engage a projection on the upper window, said lever having lateral projections engageable with the edges of the vertical supports, a toggle spring, an inclined leg on the base connecting one end of the spring to the base and a collar on the opposite end of the spring having spaced prongs thereon to receive the lever projection, and said spring adapted in one position to urge the lever arm toward the upper window to retain the trip finger in its projected position and adapted in another position to force the lever toward the rear of the vertical supports to hold the lock finger in its projected position.


REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 730,996 Wever June 16, 1903 922,894 Held May 25, 1909 1,269,467 Leonard June 11, 1918 1,387,302 Page Aug. 9, 1921 1,750,715 Jefiers Mar. 18, 1930

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US730996 *Nov 3, 1902Jun 16, 1903Frank P DamonSash-holder.
US922894 *Feb 25, 1909May 25, 1909Edward HeidAutomatic sash-lock.
US1269467 *Dec 1, 1915Jun 11, 1918Grand Rapids Refrigerator CompanyRefrigerator-latch.
US1387302 *Dec 23, 1918Aug 9, 1921Page PeterSafety-lock for windows and the like
US1750715 *Apr 9, 1927Mar 18, 1930Martin Parry CorpWindow regulator
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2661973 *Jul 27, 1950Dec 8, 1953Illinois Railway Equipment CoRetaining means for doors and the like
US5901501 *Aug 29, 1997May 11, 1999Interlock Group LimitedWindow fastener
US8061741 *Oct 18, 2007Nov 22, 2011The Chamberlain Group, Inc.Movable barrier drive case installation safety latch method and apparatus
US8182001Sep 14, 2006May 22, 2012Milgard Manufacturing IncorporatedDirect action window lock
US8899632Apr 27, 2012Dec 2, 2014Milgard Manufacturing IncorporatedDirect action window lock
U.S. Classification292/198, 292/228, 292/332, 292/DIG.200
International ClassificationE05F11/00
Cooperative ClassificationE05F11/00, Y10S292/20, E05F2700/04
European ClassificationE05F11/00