US851299A - Sash-lock. - Google Patents

Description

No. 951,299. PATENTED APR. 29, 1907.

` D.. D. MILES.

SASH LOCK.

APPLIOATION FILED' FEB. 13. 1905.

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7 b" t q QW f C9 c x V W D b a. Attestd V w' c' (/Ignvenljr. /f,DJ/QUMAM v t' O J lm/fw DON D. MILES, OF AURORA, ILLINOIS.

SASH-LOCK.

Specification of Letters Patent.

Patented April as, 1907.

Application filed February 13, 1905. Serial No. 245,455.

To LZ/ who/1t it ntftvl/ @ofwel/'71,;

Be 1t known that I, DON D. Minus, a citizen of the United States, residing at Aurora,

in the county of Kane and State of Illinois, have invented a certain new and useful lmprovement in Sash-Locks; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which my invention appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to sash-locks, such as are employed for use on railroad car window sash, and more particularly that class of sash-locks whose locking mechanism engages a stop or stops, secured to the window frame, and by such engagement holds the sash in an elevated position; and it has for its object to simplify and improve upon the construction of such sash-locks, whereby increased durability is obtained and greater' security against undue falling of the sash is assured.

To these ends my invention consists in certain details and combination of parts, which will hereinafter be fully described and pointed out in the claims at the end of this specification.

In the accompanying drawings, Figure l is a front elevation of th lock applied to a sash, showing the operatinglever in engagement with the rack with the sash in an elevated position g Fig. 2 a perspective view of the inside of the lock with the back plate removed, the normal position of the operatinglever being shown in full lines and its abnormal position in dotted lines; Fig. 3 a rear perspective broken view of the lock-casing and its back plate g Fig. -LL a perspective view of the operating-lever, Fig. 5 a perspective view of the spring, and Fig. 6 a similar view of the back plate.

In the said drawings similar letters of reference indicate corresponding parts throughout the several figures thereof.

A denotes the window-casing; B the sash, and O a rack consisting of astrip of metal provided with a series of projecting stops, formed by inclined surfaces a and flat or horizontal surfaces c', and secured to the casing in the usual manner, it will be apparent, however, that the number of stops employed may vary according to pre-determined points at which the sash is to be heldin elevation, also that the stops may be separated and secured to the casing independently of each other.

D represents the lock case comprising a front face l); end walls b, and front and rear edge walls c c, cut away to provide spaces d d in which an operating-lever E has movement, a thumb-piece e extends rearwardly from the upper portion of the rear wall c, and the said end walls are provided with flanges f j" having screw holes to receive screws g for securing the lock to the sash. On the inside of the case there is located a post t which extends beyond the back of the case into the wood work of the sash to relieve the screws from strain and to contribute security to the fastening thereto.

The locking mechanism consists of the op erating-lever E comprising a curved arm fi provided with an upwardly-extending arm perforated at to engage the post 7L and by which means the lever is mounted thereon. The front end of the curved arm i is inclined, as shown at Z, and operates in the space d, projecting beyond the front wall c of the case to engage either of the surfaces c of the rack O and thus hold the sash in a correspondingly elevated position, at the opposite end of the said arm there is formed a finger'- piece m which projects beyond the rear wall c of the case and affords means for operating the lever, in the customary manner.

The curved arm i of the lever E is of a thickness corresponding with the inside depth of the lock-case while the arm is reduced in thickness to provide room for a spring F, coiled around the post '/L and having branches 0 and p.' the branch o having a bearing in a recess q formed in the inside of the case, and the branch p having a bearing against a projection fr on the arm j of the lever E whereby the spring is held under tension, forcing the inclined end of the lever in position to engage the rack, as shown in Fig. 1, and which is released therefrom by upward pressure on the fmger-piece m, thus moving the lever, against the force of the spring, to the position shown by dotted lines in Fig. 2 and while held in such position the lock is free from engagement with the rack and the sash is free to operate independently thereof.

A back-plate G having a perforation s to receive the post z/ is held in recesses t t, at the back of the case, by screws (not shown) which pass through holes u fa in the said plate and engage screw-threaded bores e e formed in bosses 'w w in the lock-case.

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rIhe pivotal end of arm of the lever E is rounded, as more clearly shown in Fig. 4C, and fits into a correspondingly rounded supplemental chamber x formed in the upper wall of the lock-case on the inside thereof, whereby an outer bearing is also provided for the lever thereby insuring steadiness of movement thereto and contributing strength to the structure.

I disclaim the combinations shown and described in Letters Patent of the United States NOS. 120,540, 146,211, 202,254C and234,071, and any of them, and having fully described my invention I claim in contradistinction thereofl. In a sash lock, the combination with a case having the open spaces in the front and rear edge walls thereof, of a supplemental chamber formed on the inside of the case, a post located in the center vof said chamber and an operating-lever comprising a horizontally-disposed arm movable in said open spaces and a branch arm extending upwardly from said horizontally-disposed arm and be ing pivotally mounted on said post within the said chamber whereby an outer bearing is also provided for the lever arm which insures a steadier movement of the same and contributes strength to the pivotal connection of the lever arm with the case, substantially as set forth.

2. In a sash lock, the combination with a case having the open spaces in the front and edge walls thereof and a supplemental chamber formed on the inside of the case, of a post located on the inside of the case in the center of said chamber, an operating lever compris ing a horizontally disposed arm movable in said open spaces and a branch arm extending upwardly from said horizontally disposed arm and being pivotally mounted on said post within said chamber, and spring mechanism adapted to retain said lever arm in its normal position, substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my own, I hereunto sign my name this 4th day of February, 1905, in the presence of two subscribing witnesses.

DON D. MILES.

Iitnesses ALviN VmTn, CrIAs. A. LovE.

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