US1528705A

US1528705A - Sash lock

Info

Publication number: US1528705A
Application number: US652439A
Authority: US
Inventors: Sonner Harry
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-07-18
Filing date: 1923-07-18
Publication date: 1925-03-03
Anticipated expiration: 1942-03-03

Description

Mar. 3, 1925.

H. SONNER SASH LOCK Filed 'July 18. 1923 IN VEN TOR HqEEYSONJsme ATTORNEYS WITNESSES Patented Mar. 3, 1925.

PAT T HARRY sormlia, or new YORK, N. Y.

Application filed July 18 -in sash looks.

The principal object of the present inven tion resides in the provision of means for locking the upper and lower sashes of a window against relative movement in a direction to open the same or to effect a further opening-thereof if the same are partially open.

As a further object the invention contemplates a sash locking device of the character set forth which is extremely simple in its construction, inexpensive to manufacture and install and which is highly efficient and thoroughly reliable in its purpose.

With the above recited and other objects in view the invention resides in the novel construction set forth in the following specification, particularly pointed out in the appended claim and illustrated in the accompanying drawings, it being understood that the right is reserved to embodiments other than those actually illustrated herein to the full extent indicated by the general meaning of the terms in which th claim is expressed.

In the drawingsv Figure 1 is a fragmentary vertical sectional view through a window equipped with a sash lock constructed in accordance with the invention and illustrating the same in locked position.

Fig. 2 is a similar enlarged fragmentary view illustrating respectively in full and dotted lines the locked and unlocked positions of the latch member.

Fig. 3 is av fragmentary front view of the same.

Referring to the drawings by characters of reference A designates the conventional form of window including upper and lower sashes B and C. The sash lock constituting the invention includes a rack bar 10 having a plurality of rack teeth 11 which is preferably secured in a vertical position on the inner face of one of the side rails D of the upper sash. The pawl or latch 12 which con- LOCK.

1923. Serial n. 652,439.

sists of a flat blade is mounted for pivotal movement in a substantially U sliaped base 13. In the preferred embodiment, as illus trated, the pawl is formed with integral laterally projecting t'runni'ons lewhic h are mounted in circular bearing openings15 the side w'alls'16 of tlmU-shaiped base; the said bearing openings having 'commu'nic at ing slots 17 which extend through their for ward end edges to facilitate the'assembly "of the pawl or latchwith the base. Thebight or connecting web 18 of the base isapertured to receive therethrough fastening screws 19 anchored in the upper'face of the upper or meeting rail of the lower sash. In order to provide" means for normally swinging the pawl or latch 12 outwardly to a position for engagingthe teeth 11 of the rackbar, "a rearwar'dly projecting arm '20 isprovided on the pawl or men 12 to'theeye 21 at the free end of which a. flexible element 22- is connected and by the free end of which element a weight 23 is carried. The flexible element or core 22 is trained through a guide 24: attached to the upper portion of the window frame. In order to provide means for holding the pawl or latch in a retracted position out of engagement with the teeth of the rack bar and against casual movement and at the same time to limit the forward swinging movement of the same beyond a predetermined angle, a spring 25 is employed, the rear end of which passes through an aperture 26 and the bight or connecting web 18 is hooked over the rear end thereof. The major portion of the spring 2:) projects upwardly and forwardly or outwardly at an angle to the bight or web 18 and passes through an aperture 27 in the pawl or latch with its outer end turned downwardly as at 28 to engage with and limit the outward swinging movement of the pawl whereby to prevent swinging of the pawl or latch to a position which would allow for displacement of the trunnions from the bearing openings 15.

In use and operation of the sash lock, the pawl or latch 12 when swung to a position for engagement with the rack teeth 11 as illustrated in Fig.1, positively locks the sashes together against relative movement by a person from the outside to a position to open the window or increase the opening of the window after the same has been partially opened by a person from the inside, although the construction admits of the relative movement of the sashes with respect to each other for closing the window opening. In this instance the pawl will ratchetover the rack teeth 11 as will be clearly understood. The device will be found especially useful to lock the sashes of a window in partially open condition for the purpose of obtaining ventilation without allowing the gaining of access from the exterior 01' against the possible further opening of the window by children. The device will also function to lock the sashes in completely closed condition when desired. The spring will serve to retain the latch or pawl 12 in its retracted position against casual displacement but in order to insure against accidental movement of the same into engagement with the rack teeth the flexible element or cord 22 may be engaged in the notch 17 as will be obvious.

I claim:

A device for automatically locking the upper and lower sashes of a window against relative opening movement from the outside, comprising a rack bar secured to the upper sash, and means mounted on top of the meeting rail of the lower sash for selectively engaging the teeth of the rack bar,

said means comprising a substantially U- shaped base having its bight portion attached to the top of the meeting rail and having circular bearing openings in the side walls thereof and reduced slotted portions extending from the circular bearing openings through the outer ends of the side walls, a substantially flat latch member having outwardly projecting trunnions of a width to snugly operate the bearing openings and of a thickness to admit of the introduction of the same through the slotted portions, an angularly disposed spring mounted between the side walls of the base having a downturned outer terminal, said latch having an opening receiving said spring and engageable by the terminal to limit the outward swinging movement of the latch and to prevent turning of the same to a position to admit of separation ofthe latch from the base, said spring serving to frictionally hold the latch in its engaged relation to the teeth of the rack bar, and a weighted element connected with the latch for normally swinging the same to a position for engagement with the rack teeth.

HARRY SONNER.