US2276881A

US2276881A - Counterbalanced window sash

Info

Publication number: US2276881A
Application number: US316541A
Authority: US
Inventors: Schimmel Fridolin
Original assignee: HERBERT E SCHIMMEL
Current assignee: HERBERT E SCHIMMEL
Priority date: 1940-01-31
Filing date: 1940-01-31
Publication date: 1942-03-17
Anticipated expiration: 1959-03-17

Description

Patented Mar. 17, 1942 COUNTERBALANCED WINDOW SASH Fridolin Schimmel, Faribault, Minn., assigner to Herbert E. Schimmel, Minneapolis, Minn.

Application January 31, 1940, Serial No. 316,541

2 Claims.

This invention relates to window structures of the type employing upper and lower vertically slidable sash, and provides simple and efficient means whereby the customary window weights and weight-boxes are eliminated and made unnecessary. Generally stated, the invention consists of the novel devices, combinations of devices and arrangement of parts hereinafter described and defined in the claims.

In the accomplishment of objects of my invention I provide a flexible or belt-like connection between the upper Iand lower sash whereby the weight of the one sash is counter-balanced or counter-weighted against the other. The flexible connection herein broadly designated as a belt may take Various forms, but preferably will be in the form of a chain, one end of which is connected to the lower and the other end to the upper sash; and this chain is arranged to run over a belt guide located above the highest points reached by the ends of the chain in the various movements of the upper and lower sash.

The belt guide is a vertically adjustable guide head or bracket equipped with a roller over which the belt directly runs.

In counter-weighting or balancing the sash and chain a cooperating guide will preferably be located at each side of the sash or at each side of the window frame. The belt guide devices in themselves include novel` features whereby they are properly adjusted for the sash; and preferably each sash is provided withan independent lock whereby important results hereinafter more fully described are made possible..

A commercial embodiment of the invention is illustrated in the accompanying drawing wherein like characters indicate like parts throughout the several views.

Referring to the drawing:

Fig. 1 is a vertical section showing a window frame with the customary upper and lower sash and illustrating a preferred embodiment of the sash-connecting means, some parts being broken away;

Fig. 2 is a horizontal section taken on the line 2--2 of Fig. 1, some parts being broken away;

Fig. 3 is a fragmentary vertical section taken on the line 3-3 of Fig. 1; and

Fig. 4 is a fragmentary vertical section taken on the line 4-4 of Fig. 1.

The window frame, which is indicated as an entirety by the numeral 5, is provided with the customary outside guide strip 6, vertical inside guide strips l and vertical parting or intermediate guide strips 8. The lower and upper sash 9 and I0 are guided for vertical movements by the said

strips

6, 1 and 8 and may be of the usual or standard construction. The flexible belts which, as indicated, are preferably chains .II, are attachedthe one end thereof to the ytop of the lower sash 9, and the other end thereof to the upper sash I0, preferably at a point considerably below the top thereof. The attachment of the ends of the chain to the said sash may be made in any suitable way, but preferably is made by means of linklike anchoring anchors I2 secured to the respective sash by screws, nails or the like.

In the drawing only one side of the sash is shown but the belts and guides will, as stated,

be duplicated on opposite sides of the windowv frame; The belts are arranged torun freely on flanged guide wheels I3 journalled on studs or j heavy rivets I4 to one side of a box-like bearing head which, as shown, and preferably, is made up of a channel-shaped sheet metal member I5 and a plate-like member I6, the said membersv I5 and I6 being connected by the said studV or rivet I4. The anges of the channel-shaped member I5 project beyond the plate I6 and an anchoring bolt I'I is passed through perforations in these flanges. The upper end of bolt I1 is threaded and is arranged to be screwedinto anchoring lug or bracket I8 that is rigidly secured'to the top of thewindow frame above the highest position of the lower sash, by suitab means such as a wood screw I9. A

For locking the bolt I1 in' the properly set positions to properly adjust the chains, asrshown in Fig. 3, a screw I9 is threaded through the hub of the bracket I8 and is engageable against the threaded end of said bolt l1. The bracket I8 is.

also preferably further provided with a lug I8'` that enters a notch cut in the window frame, as best shown in Fig. 3, and assists the screw I9 in locking the bracket I8 against lateral shifting both of the sash locks.

To cover and guard portions of the chains at the inner side of the windowy a protecting shield or strip 23, which is preferably of sheet metal and Z-shaped in cross section, is shown as applied to the sides of the window frame by means of screws 24 or the like 'Ihe operation and use of the device described is substantially as follows.

The two window sash will so nearly counterbalance each other that the one will offset the weight of the other and when the lock devices` of the two sash are released. the two frames may be moved at will. Of course, when the one sash is moved upward, the other sash will move downward. Any slight difference in the counterbalance of the two sash will not be suflicient to overcome the slight friction in the connecting and supporting devices, to produce any accidental or undesirable movement of the sash. When, foi example, the lower sash is locked against vertical movements in its lowermost position, the upper sash will be held in its upper position and then, of course, cannot be moved either upward or downward. If the lower sash be locked in a slightly raised position, the upper sash cannot bc moved downward but can be lifted slightly by giving slack to the chains. When adjusted as shown in Fig. l, there will be ventilation both at the bottom and top of the window.

If the lower sash be locked in either its eX- treme upper position or in an intermediate position, the upper sash cannot be moved downward but can be lifted by giving slack to the chains. When the lower sash is moved to an extreme lower position, the upper sash will be automatically moved to its uppermost position; and if the lower sash be thus locked in its upper position, the lowered upper sash can be raised by` giving slack to the chain; but if the upper sash then be locked in its lowermost position, the raised lower sash cannot, of course, be lowered. If the window be entirely closed by movement of the lower sash to its lowermost position, and the upper sash. to its uppermost position, a double locking may be produced by setting the locks of both sash.

From the foregoing it is probably evident that the application of the locking of the lower sash is most important because when the window is closed and the lock of the lower sash is applied,

it is not possible to move the upper sash either upward or downward; whereas, if the lock Aof the upper sash be operated when the window is closed, it will be still possible to raise the lower sash by giving slack to the chains. It is important, of course, to note that both of the locks are operable from the inner side of the window.

In this improved device the pulley is journaled in and movable with the casing; the casing is supported for vertical adjustments solely by a screw or screw bolt; the screw bolt is provided with a head that affords a stop for the downward movement of the casing; and the casing is capa-V ble of oscillatory movements on said screw bolt.

The casing with its pulley is not only capable of lateral oscillations on the screw bolt but can be turned either side in for application, at will, to either side of the window so that two identical devices will sufce to support two sides of a sash. In this simple device a casing for the pulley is provided and the single screw bolt serves as a means for supporting and simultaneously adjusting the casing with its pulley. With this device it is evident that the casing is mounted to oscillate on the supporting screw rod and when the device is removed or before it has been applied to the window casing, it is capable of complete rotation on the rod or rotation through at least so that the device can be used either in right or left, that is, can be applied to either side of a window frame.

A preferred form of the invention has now been described, but it will be understood that the invention is capable of modification as to detail of construction and arrangement of parts all within the scope of the appended claims.

What I claim is:

1. A belt supporting and guiding device of the kind described involving a casing having at least one laterally projecting flange, a pulley journaled in said casing, a fixed support above said casing, and a screw rod passed through said ange and having a threaded upper end adjustably engaging said fixed support, said screw rod having a head engaging said ange and directly supporting said casing with freedom for oscillatory movements around said rod. said rod affording the sole means for vertically adjusting said casing and the pulley'journaled in the latter, said casing, when said device is removed from working position, being capable of at least 180 rotation on said rod, whereby, said device is made applicable to either side of a window casing.

2. A belt supporting and guiding device ofthe kind described involving a casing having upper and lower laterally projecting flanges and a supplemental side plate, said flanges projecting beyond said side plate, a belt guiding wheel journaled to the fixed and supplemental side portions of said casing, a relatively fixed support above said casing, and an anchoring screw bolt passed upward through both of said flanges just outward of said supplemental side plate, said screw bolt having at its lower end, a head upon which the lower of said flanges directly rests, the upper end of said screw bolt being threaded for engagement with said relatively xed support, said rod affording the sole means for vertica lly adjusting said casing and the pulley journaled in the latter, said casing, when said device is removed from working position, being capable of at least 180 rotation on said rod, whereby, said device is made applicable to either side of a window casing.

FRIDOLIN SCHIMMEL.