US555017A

US555017A - Sash-lock

Info

Publication number: US555017A
Authority: US
Publication date: 1896-02-18
Anticipated expiration: 1913-02-18

Description

(No Model.)

S. S. NUTTING.

sAsH LOCK. No. 555,017. Patented Feb. 18, 1896.

MMM A ,l yj .Y diy* by inserting a saw between the meeting-rails 'ATENT Ormea.,

SIDNEIT SMITH NUTTING, OF ELGIN, ILLINOIS.

'SASH-LOCK.

SPECIFICATION forming part of Letters Patent No. 555,017, dated February 18, 1896.

Application filed July l, 1895. Serial No. 554,610. (No model.)

To all whom it may concern,.-

Be it known that'I, SIDNEY SMITH NUT- TING, a citizen of the United States, residing at Elgin, in the county of Kane and State of Illinois, have invented certain ne'w and useful Improvements in Sash-Locks; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. My invention relates to an automatic sashlock for use on the meeting-rails of verticallymovable window-sa'shes.

The obj ect that I have in view is to provide a simple sash-lock which will automatically lock the window-sashes together when one or both sashes are closed, and which cannot be opened except by a person. having access to the locking-bar on the inside of the window.

A further object of my invention is to provide detaining means which will prevent the locking-bar, when the sash is raised,from turning to its locking position, so that the lock-ingbar will be held in place to vinsure its automatic operation whenl the sash is closed, which detaining means is automatically thrown out of the path of the locking-bar on lowering' the sash.

A further object of my invention is to construct the base-plate and catch in a way to insure fitting closely together and to prevent edgewise movement of the sashes when they are closed, whereby access to the locking-bar of the sashes is prevented, and the sashes cannot be forced edgewise to open a space between said sash-rails to insert an implement for throwing the locking-bar out of position.

W'ith these ends in view my invention consists in the combination of devices and in the novel construction and arrangement of parts, which will be hereinafter fully described and claimed.

To enable others to readily understand my invention, I have illustrated the preferred embodiment thereof in the accompanying drawings, forming a part of this specification, and in which- Figure l is a plan View showing the fastener or lock applied to the meeting-rails of two sashes, the locking-bar being shown in its closed position. Fig. 2 is a vertical transverse sectional view on the plane indicated by the dotted line :t of Fig. l. Figs. 3 and 4 are detail perspective views of the catch detached from the sash. Fig. 5 is a perspective view of the base-plate or casing and the locking-bar. Fig. 6 is an inverted or bottom plan view of the base-plate or casing. Fig. 7 is a detail view showing the manner of connecting the locking-bar and thumb-piece.

Like letters of reference denote corresponding parts in all the iigures of the drawings, referring to which- A designates the base-plate or casing, and B is the locking-bar which is pivotally mounted on the base-plate or casing. The base-plate is cast or otherwise wrought in a single piece of metal with the apertured ears a a, and

with a cavity or space h in its lower surface,

which cavity is surrounded by the flange '0' at the edges of the base-plate.

In the base-plate is formed the arc-shaped slot c, and a straight slot d is also formed in said base-plate. The front edge of the baseplate is straight to enable the plate to be properly iitted to the inner edge of the upper rail of the lower sash, and in the lower edge of the surrounding flange b/ on this straight side of the base-plate is formed a recess or notch d', which lies in the same vertical plane as the straight slot d in the base-plate A.

The locking-bar B is preferably cast in a single piece, and it is made of angular form somewhat like a bell-crank lever, but with one arm longer than the other arm. The locking-bar is pivoted by a vertical pin or rivet C, which passes through apertures in the plate and bar and has its lower end swaged down against the inside surface of the baseplate. The long arm B of the locking-bar has a tapering lip c projecting upwardly from its outer free end, and on one edge of said long arm B is formed an ear e', which projects outwardly from said arm H. To the short arm B" of the locking-bar is connected an operating thumb-piece F. I prefer to connect the operating-piece F to the locking-bar by a concealed loose joint which prevents separation of the thumb-piece from the locking-bar, except when the bar is removed from the base-plate, and which joint enables the thumb-piece to be lifted slightly, so as to clear ICO a detaining-lip f provided on the top face of one of the ears a on the baseplate. This detaining-lip is in the form of a raised rib and has a level upper face and an abrupt side or shoulder against which the thumb-piece F is adapted to bear or press when the lockingbar is engaged or locked with the catch. The joint between the short arm B of the bar B and the operating-piece F is made by forming recesses in the arm B" to receive ears on the thumb-piece, which parts are engaged so as to permit the thumb-piece to have a lifting movement, which, however, is limited to provide just enough play for the thumb-piece to clear the detaining-lip f. I do not use a rivet or other device for fastening the thumb-piece to the locking-bar, but rely upon the interlocking shoulders and recesses to couple the thumb-piece to the locking-bar, whereby the parts are connected by a practically concealed joint.

The lockingbar is held or thrown to its locking position, except when restrained by the detent, by the action of a concealed eireular spring G, which is housed or contained within the cavity b of the plate A. This spring is bent from a single piece of stout wire, one end of which is fitted between the studs g g on the plate A within the cavity b. This end of the spring G is looped around one of the studs g, and the other end of the spring is bent into a vertical prong g', which passes through the arc-shaped slot c in the base-plate A and is fastened or connected in a suitable way to the long arm B' of the locking-bar, so that the spring is not exposed to view from the outside of the sash-lock. This prong g of the spring abuts aga-inst one end wall of the curved slot b when the bar Bis in its locking position, and when the bar is turned by hand to throw it out of locking position and release it from the catch the prong g is adapted to strike against the other end wall of the slot and thus limit the movement of the lockingbar and prevent undue straining of the spring.

A detent Il is provided to hold the lockingbar when it is released from the catch from being thrown back or held by the spring G in locking position, whereby the locking-bar is caused, when the lower sash is ready to be lowered to a closed position, from moving too far around so that one end thereof will abut against the top end of the catch-post, and thus the locking-bar is caused to properly ride aga-inst the catch so as to automatically engage therewith. This detent is of rght angled form, and one of its arms is fitted in the groove d in the base-plate A, while its other arm passes through the vertical slot d in said base-plate.

\Vith the right-angled detent Il is engaged a spring I, which is concealed in the cavity b of the base-plate, and this spring presses the detent forward when the locking-bar is free from the catch as well as when the sash is raised, so that the vertical arm of the detent is in the path of the ear e' of the locking-bar,

while the horizontal arm of said detent is projected a suitable distance beyond the front straight side of the base-plate. This detent is notched to receive the looped free end of the spring l, the other end of said spring being looped and fitted around the studs i on the baseplate within the cavity b. From the straight front side or edge of the plate A projects a lug J, which is adapted to ride against the catch to guide the base-plate A in proper position opposite to the catch, and said lug bears against the catch when the sashes are closed so as to prevent the sashes from being moved or forced edgewisc.

K represents the catch which is formed or cast in a single piece of metal, and it consists of the plate K and the post L The catchplate K is provided with perforations 7c at or near its ends for the passage of screws to fasten the catch to the lower rail of the upper sash, and said plate has, at its front edge, a pendent lip or flange 7s', which is adapted to fit over the front face or edge of the lower rail of the upper sash, a recess being cut in the inner face of the upper rail of the lower sash to adapt the rails of the two sashcs to properly fit together. This flange 7c on the catch prevents a saw from being inserted between the meeting-rails of the two sashes for the purposes of cutting the locking-bar.

The post L of the catch is formed with three inclined faces which serve important purposes in connection with the lng J on the base-plate A, the locking-bar, and the detent ll. The front face, Z, of the post is inclined. or beveled backwardly from the bottom toward the top of the post, the front edge, m, is inclined to form the overhanging shoulder and the notch or recess m', and the back edge, v1, of the post is inclined downwardly and outwardly from the top to a point above the plate K', and is then extended in a practieall y straight line at n. The horizontal arm of the detent ll is adapted to ride against the inclined front face, l, of this post when the sash is lowered and thus move the detent ou t of the path of the lug e on the locking-bar. The free end of the locking-bar strikes the front beveled edge, m, of the catch-post, and the bar is thus turned on its pivot until it clears the shoulder and is then forced, by its spring, into the recess of the post, thus automatically locking the sashes when the sash is lowered. The lng J of the plate A rides against the inclined edge a of the post L to guide the baseplate A and locking-bar into proper relation to the catch, and when the sash is lowered and locked this lng J bears against the edge n of the post,whereby the locking-bar andthe lug J engage opposite sides of the catch-post to prevent the sashes from bein g forced edgewise.

The operation may be briefly described as follows: To close and lock the sashes, the upper sash is raised and the lower sash pulled down. As the lower sash moves past the catch, the lu g J strikes and rides against the IOO ITO

edge n, the detent is forced back in the slot CZ by its protruding end riding against the beveled face l, and the bar B is turned out of position by the free end riding on the edge m of the post. When the sash is lowered, the bar B clears the edge fm of the post, and the spring forces the free end of said bar B into the notch in the catch, thus automatically locking the sashes. The thumb-piece on bar B engages the abrupt shoulder f on the plate A to prevent the bar B from being turned out of position, and as the bar B is thus locked in place against the post L on one side and the lug J engages the other side of the catchpost it is evident that .the sashes are securely locked together. To release the fastener and open the window, it is necessary for the operator to lift the thumb-piece above the shoulder so it will ride on the raised rib f and turn the bar B until its long arm clears the shoulder on the catch and post, after which the sash can be lifted. As the sash moves past the catch, the spring I forces the detent I-I into the path of lug e on the bar, and the bar is thus prevented from being turned by its spring back to its locking position, so that the locking-bar is held in proper position to ride against the edge m of the catch when the sash is again lowered.

In practice I prefer to remove the stock in the cavity of the base-plate A, so as to leave a flange of even thickness all around the base-plate, and I also prefer to hollow out or produce a cavity in the under side of the catch-plate to leave a surrounding flange7 on which it will rest when applied to the sash, which flanges are clearly shown in the detail views of the drawings.

The horizontal arm of the right-angled detent H is preferably provided with a small head or knob on the end that projects through the recessed straight flange on the base-plate to prevent said detent from slipping through said recess and the slot in the base-plate and from getting out of position while handling the fastener before applying the same to a window.

The primary object in providing the catchplate K with the lip or flange lo is for the convenience of locating the catch in proper position when applied to the sash and to bring the lock far enough to the front to allow the end of the locking-bar to clear the top rail of the outside sash when the lower sash is raised clear up. Byreference to Fig. 2 of the drawings it will be noted that the recess or -perpendicular cut only extends about half-way down the beveled inner face of the inner sashrail and it is made only wide and deep enough to free the upper rail of the lower sash from the lip k' on the catch when the lower sash is raised without leaving an opening or space on the outside of the lower edge or face of the upper rail of said lower sash. It will be readily seen that a saw inserted between the meeting-rails of the two sashes on either side of the lock would strike against one end of the lip 7d, or if the saw is pushed up under the lip it would follow the bevel of the sashrail and its end would strike the under side of the lip,whereby the lip on the catch serves in a measure to prevent access to the lockingbar. As a burglar might cut between the sashes on the outside so that a saw can be pushed straight up by the locking-bar, I propose in some cases to make the lip la wider and produce a shoulder k" which projects out far enough to lit beneath the straight front edge of the base-plate when the sashes are closed. This construction of the catch with the shoulder-lip k 7c will effectually prevent the locking-bar being reached by a saw in the hands of a burglar.

I am aware that changes in the form and proportion of parts and in the details of con* struction herein shown and described as the preferred embodiment of my invention may be made by a skilled mechanic without departing from the spirit or sacrificing the advantages of my invention, and l therefore reserve the right to make such changes and alterations as fairly fall within the scope of my invention.

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

1. The combination with a base-plate of the catch having the beveled front face Z and the inclined notched edge m, m', a locking-bar connected to the base-plate to ride against the beveled notched edge m, m', of said catch, and a slidable detent carried by the base-plate to lie in the path of the locking-bar and having one end of said detent arranged to ride against the beveled face Z of the catch, substantially as described.

2. The combination with a double beveled catch, of a base-plate, a spring-controlled locking-lever pivoted to said base-plate, an operating-piece connected to the locking-bar and adapted to engage with the base-plate to hold the bar in place when engaged with the catch, and a spring-controlled detent slidablymounted in the base-plate to lie in the path of the bar and adapted to ride against one of the beveled faces of the catch to be thrown out of position by contact therewith, substantially as and for the purposes described.

3. The combination of a base-plate having a lug J projecting from its outer edge, a catch having its post provided with the edges fn, n against which the lug J is adapted to ride, and a locking-bar carried by said plate to ride against, and engage with, the post of the catch, and mechanism for holding the locking-bar in engagement with the catch, substantially as described, for the purposes set forth.

4. A catch having an upright post provided with a beveled front face and the beveled edges, combined with a base-plate having a lug J, a pivoted locking-bar, and a detent, substantially as and for the purposes described.

IOO

IIO

5. The combination with zt bose-plaie, and :t locliingbnr, of an singular slidable detent loosely fitted in the base-plate, a. spring for normally holding smid detent in position to have one end thereof in the path of the locking-har and projecting its other end beyond the vertical edge of the base-plate, and n. beveled catch against which the'protrudingl end of the detent is adapted to ride, for the purpose described, substantially as set forth.

G. The combination of a slotted base-platte, having i cavity, :t pivoted locking-bor, :i slidnble detent, springs fastened Within the caw ity of the base-plate and connected to the locking-bar and to the detent, respectively,