US206583A - Improvement in fasteners for the meeting-rails of sashes - Google Patents

Description

2 Sheets-Sheet 1v.

B. L'ANDBR.

Fenstenwr for the Meeting-Rails of Sashes.

Nep. 206,583, Patented July 3o, 1318.

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B. LANDBR.-

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Fastener for the .Meeting-Rails of Sashes. No. 206583.

Patented my 3o, 187s.

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/Mm' yb UNITED STATES PATENT EEIEa BENJAMIN LANDER, OF IBROOlx'LYN, NElV YORK.

IMPROVEMENT lN FASTENEHS FOR THE MEETING-RAILS 0F SASHES.

Specification forming part of Letters Patent N0. 206,583,1lu1ed Jul)y 3l?, lr'zT-E; application filed November 9, 1877.

To all whom it may concern:

Be it known that I, BENJAMIN LANDEE, of the city of Brooklyn and State of New York, have invented a :new and useful Improvement in Automatic Sash-Locks, of which the following is a full, true, and exact description, reference being had to the accompanying drawings. The purpose of my invention is to forni a sashlock which will automatically lock together the two sashes ot' a window-frame when both are closed, which locking-cam is attached to one of the window-sashes, while a contrivance is attached to the other which will unlock and free the locking-cam attached to the other sash, and allow the window to be opened. By means of this contrivanee, the difficult-y commonly experienced in operating these locking-cams is avoided, lfor, whereas heretofore there has usually been a liability of pinching or injuring the tingers in throwing back the locking-cam at the time the window is raised, by means of this contrivance the hand does not come in contact with the locking-cam at all, but operates a tripping device attached to the moving sash; and my apparatus is constructed to be operated by gravity alone, without the necessity of any spring. This cam can be thrown back in various ways, as will be hereinafter shown.

In my drawing similar letters refer to similar parts in all the iigures.

Figure l represents the sashes closed; Fig.

2, partially open; Fig. 3, still farther open,V

showing the window-bars more plainly 5 and Fig. 4, a general View, with the thumb-piece and tripping device connected together and forming one piece.

A and B represent the front or lower and rear or upper sash, sliding in the ordinary window-frame, and separa-ted by the strip K in the usual way. G represents the glass set in the window-bars, which are vertically represented by @o and r, horizontally' by It. It is customary with windows that the glass be placed nearer the back than the front of the frame, and that the part of the bar yw inside of the glass be broader than the part i: outside of the glass, so that while the front edge of the bar or molding is flush with the edge of the window-frame, as is clearly shown in Fig. 3, the rear does not extend to the outside edge of the window-frame, but is recessed, as it were, so that there is a certain amount of free space between the edge of the window-frame and the back edge of the window-bars, which I have represented by the letter m. It is plain that no locking contrivance attached to the front sash can project beyond the line n without coming in contact with the cross-bars of the upper sash; therefore any automatic device attached to the lower sash would necessarily strike against and injure the frame of the npper sash. I have therefore attached my automatic sash-lock to the upper or rear instead of the lower or forward one, whereby I obtain a space in which it can swing clear of the crossbars of the lower sash, and thus avoiding the difiiculty just mentioned.

C represents the swinging cam, pivoted at c, and so constructed that gravity tends to throw it forward into the position shown in Figs. 1 and 3, while it can be thrown back into the position shown in Fig. 2 by some unlocking contri vance. This lockin g-cam is situated within the protecting and inclosing case F. Attached to the front sash is the stationary piece O, with which the locking-cam G engages. Both are provided with correspondingnotches and teeth p, whereby a more certain contact is obtained. Attached to the lower sash is a tripping device, which preferably consists of two pieces, H and I), pivoted at h and d.

The vibrating piece H is provided with a tooth or arm, r, which bears against the locking-cam U. It is obvious that if the vibratin piece H be thrown up, as shown by the dotted lines in Fig. 1, its action on the locking-cam will force the cani into the position shown in dotted lines in Fig. l or in Fig. 2. This vibrating piece II can be raised by the trigger D, pivoted at d, and provided with a thumbpiece, t. 1f the thumb-piece be depressed, the frame will likewisebc depressed, and the cam C will be thrown back into the position shown in Fig. 2. By placing the hand beneath the upper bar otl the frame A, with the thumb against the thumb-piece t, said thumb-piece is readily thrown into thefposition shown in Fig. l by dotted lines, whe'n the lower sash can be raised, since the cani will be in the position shown in Fig. i. After the frame of the lower sash has passed clear ot' the cam C it will swing forward into the position shown in Fig.

3; but, owing to the existence of the recess m, it will not collie in contact with the crossbar t of the window-frame.

The locking-cam is provided with the tooth or lug .1", which comes in contact with the lower part of the frame or .case F, which prevents its farther forward movement; but this is obviously unnecessary it' the cam be properly balanced.

After the window-frames A and l have passed each other and the window is closed, gravity will tend to throw the cam forward into the position shown in Fig. l, after it has been forced back by the edge of the windowframe into the position shown in Fig. 2. The stationary piece O might be provided with a guard extending down on the beveled surface ofthe lower sash, on which the forward point ofthe cam could slide.

In case the window was not entirely closed, a tooth, p, of the cam would still engage with some ofthe teeth ofthe stationary' piece (l. It is plain that the tlnnnb-pieee t might be attached directly to the vibrating` piece Il, as shown. The upward lnovement ot' the thumb-piece would then have the ett'ect ot' first unlocking, then raising the sash A.

The principle of my invention is the use ot' an automatic cam operated by gravity, which locks the two window-frames tirmly together on the closure ofthe sash, which cam is pret'- erably attached to the upper sash, and which cam can be unlocked by a tripping device attached to the other sash, whereby it can bc thrown clear of the rising lower sash.

The advantages of this arrangement are very obvious, for the sashes cannot, if once closed, be left unlocked, as is now the case. The apparatus is simple, inexpensive, reliable, and durable, and accomplishes the whole result without an unnecessary movement, which is not the case with any other apparatus with which I am acquainted. The cam C might be notched at lr, for the purpose of preventing the throwing down of the cam C, by means otl a bent wire acting against the upper surface ot' the cam (l, and inserted from the outside, since such wire or knife would catch in one ot the notches, and bear against the side ot' the case E surrounding` and supporting the vibratin g piece ll.

It is plain that the cam could be constructed in various ways, provided its center of gravity was so arranged as to throw it forward on a pivot. It might have only one healing-point against the stationary piece O.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination ot'the swinging cam having one or more teeth or points, p, attached to one sash ot' the window, with the iixed surface having corresponding teeth or corrugations, and attached to the other sash ol' the window, substantially as described.

L. The combination ot' a swinging locking caln attached to one sash of a window and a vibrating piece attached to the other sash ot'

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