US2288558A

US2288558A - Friction window sash mounting

Info

Publication number: US2288558A
Application number: US306440A
Authority: US
Inventors: Fred N Vose
Original assignee: MATHEWS BROTHER CO
Current assignee: MATHEWS BROTHER CO
Priority date: 1939-11-28
Filing date: 1939-11-28
Publication date: 1942-06-30
Anticipated expiration: 1959-06-30

Description

June 30, 1942. F. N. vosr-z FRICTION WINDOW SA SH MOUNTING Filed Nov; 28, 1939 Patented June 30, 1942 assess:

T OFFICE rarcrros wmnow sasn MOUN'IJNG Fred N. Vole, some .Maine, auignor 'to' Mathews Brother Co ration of Maine .,Beifast,Maine,aeorpo-' Application November as, me, Serial No. seem a Claims. 20-52) This invention relates to windowconstruction wherein the sashes are held frictionaily instead of being counterbalanced. For this purpose the window casing is provided with sash-engaging strips pressed into frictional engagement with the edges of the sashes. The heavier the sash for a given length of engaging strip contacted. or the shorter the engaging strip contact for a given weight of sash, the greater is the frictional pressure required to maintain the sash in lifted position. but a pressure greater than necessary to hold the sashinanypositioninwhichitmaybe placed is not desirable since it adds to theeffort necessary to move the sash. -IBieretofore it has been the usual practice to provide for the pressure required in a y particular installation by selection of the sizeand stiffness of the springs which have been employed to press the friction strips against the sashes. This method is largely a matter of guess work and many times requires trial and change for reasonably satisfactory operation. 7

An object of the present invention, therefore, is to provide-for adjustability of the spring pressure in such a manner that the adjustment may be made'after assembly of all the parts and in accordance with the individual requirement of each sash.

A further object is to provide for such adjustment which shall be effective over a substantial length of the friction strip. rather than merely locally, so that the effects on the sash may be made readily substantially uniform throughout the range of motion of the sash.

For a more complete understanding of this in-- vention, reference may be had to the accompanying drawing in which- Figure 1 is a vertical section through a window frame and related parts showing upper and lower sashes therein. this structure embodying the invention.

Figures zand 3 are detail sections to a larger scale on section lines 2-4 and 3-4. respectively, of Figure 1.

Figure 4 is a detail section on line 4-4 of Figure 3.

Figure 5 is aviewsimilar to aportionofFigure 3, but illustrating adjustment of the frictional pressure on a window sash.

Referring to the drawing, at l and 2 are indicated the upper and lower sashes of a window which sashes are slidable within the

sash guides

3 and 4, respectively. As shown, the sash guides are formed inpart by a metallic strip I having a central sash separator portion 6 which may be of and engages within a shallow rounded channel ltintheedgeportionofthesash. 'lhesemembersiiaresprlngpressedagainsttheedsesofthe sash and preferably extend the full lengths of thesashguidesinordertoactnotcnlyasfriction elements for retainingthesashesinanypo- 'sitionsofslidingadjustment, butalsotoactas sashesfrom weather strips, sealing the frame and passage of. air therepast.

Each of the strip members I! is shown as secured asat oppositeends withintheframere 'cesses llLandforthispurpoualightcoilspring H has been illustrated, one end portion I! of which may be extended through a perforation it in the lining part 8, the opposite endof eachof these springsbeingextendedthroughahole It in thestrip portion l5 and hooked thereover as shownbestinFigure-i. Thesesm'in'gsactto retain the friction members within their recesses withpossibility of yielding to an extent sufficient to insure engagement of the strip members on the sashes. These strip members are pressed outwardly against the sashes by the adjustable springmeansshownbestinFigures3and5. Such a spring member comprises a leaf spring 20, opposite end portions of which are curved as at 2| and bear against one part, shown as the back face of the socket or the lining for this socket. Between theseeend portions 2| an the central portion 22. each spring member has an outwardly extending portion 23 which bears against he otherpart. shownastheback faceofthefriction strip member IS, the two portions 2| and 23 on each side of the central part of the spring acting to press the friction strip i5 outwardly. The extent of this outward presure may be regulated asby turning the screw 25, whichhasahead 26 positioned in a depression 21 in the outer face of the friction strip l5, this screw enga ing in a threaded opening 2| of a nut member a which maybesecuredto orbeintegralwiththes'pring 20. As shown this nut member "is of rectangularshapesoastobeheldfrom rotationwith the screw. should it not be secured to the spring 20, by engagement with the opposite sides or the strip i5 within which it may be housed. By turning thescrew 25 in arnanneriobrlng the central portion of the spring '20 outwardly. the portions 23 and 2i are pressed with greater force between theinnerface oithestrip I andthebackoi'the socket or the lining 10, to exert an increased effect to press the strip [5 out from its recess and into tighter frictional engagement with the edge at the sash contacted thereby. It will be noted that the head 26 of the screw is accessible on the inner face of the friction strip so that the adiustment of the spring tension may be made while the sash is in position. It may thus be adjusted to the conditions of the installation with respect to the length of the contact between the friction stnpandthesasnandtheweightoithesashso that an accurate adjustment suited to the exact conditions of operation may be readily eiiected. It will be noted, also, that the adjustment is effective on the friction strip at two points spaced considerably from each other. Thus an adjustment over an extended length or the friction strip is produced instead of the eiiect being localized. For all but the very short sashes, ordinarily two oitheseadjustmentsprlngswillbeallthatis necessary for each friction strip, though for extremely high sashes, three may be used. Because oi the extended area over which adjustment takes place, however, it is a relatively easy matter to provide for the desired frictional engagement of the sash substantially uniiormly throughout its range of movement, so that the sash will remain in any position inwhich it is placed and yet wfll not slide too hard in any portion oi. its path.

In order to further provide for electing weather stripping of the sashes, their parting strips 30 and 3| may be provided with inter-engaging weather strips 32 and 33, respectively, and suitable weather strips such as 34 and 36 may be provided for the lower edge of the inside sash and the top edge of the outside sash.

From the foregoing description 01' an embodiment or this invention, it should be evident to those skilled in the art that various changes and modifications might be made without departing from the spirit or scope of this invention as defined by the appended claims.

I claim:

1. The combination with a window frame having a sash guide, and a recess extending lengthwise within said sash guide, of a generally U shaped sash-engaging member seated in said recess, a leaf spring between the sides of said member and having end portions engaging the base of said recess and portions between said end portions and central portion for engagement with the back face of said sash-engaging member, and means engageable with the central portion of said spring and said sash-engaging member and accessible irom the sash-engaging face of said member for adjusting said central portion toward and from the base 01 said recess, thereby adjusting the pressure or said spring acting to push said member against the edge of a sash movable in said sash guide.

2. The combination with a window frame having a sash guide, and a recess extending lengthwise within said sash guide, of a generally U shaped sash-engaging member seated in said recess, a lea! spring between the sides of said member and having end portions engaging the base of said recess and portions between said end portions and central portion for engagement with the back race of said sash-engaging member, the central portion of said spring being bowed away irom said sash eng member and having a threaded part operatively related thereto, and a screw engaging in said threaded part and having a head accessible from the sash-engaging face of said'member.

FRED N. VOSE.

CERTIFICATE OF CORRECTION. Patent No. 2,288,558. June 50, 19!;2.

' FRED N. VOSE.

It is herehy certified that the name of the assignee in the above numbered patent was erroneously described and specified as "Mathews Brother C0." Whereas ssid name should have been described and specified as "Mathews Brothers C0,; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the me in the Patent Office.

Signed and sealed this hth day of August, A. D. 19L 2.

Henry Van Arsdle, (Seal) Acting Commissioner of Patents.