US2384980A

US2384980A - Sash balance

Info

Publication number: US2384980A
Application number: US547822A
Authority: US
Inventors: Viehweger August
Original assignee: Grand Rapids Hardware Co
Current assignee: Grand Rapids Hardware Co
Priority date: 1944-08-03
Filing date: 1944-08-03
Publication date: 1945-09-18
Anticipated expiration: 1962-09-18

Description

sept'. 1s, 1945.

WI: I

A. VIEHYVEGER sAsH BALANCE Filed Aug. 3, 1944 fww# l Patented Sept. 18, 1945 UNITED STATES PATENT OFFICE SASH. BALANCE v August Viehweger, Grand Rapids, Mich., assignor to Grand Rapids Hardware Company, Grand Rapids, Mich., a corporation of Michigan Application August 3, 1944,. Serial-No. 547,822

11 Claims.

.This invention relates to improvements in sash balances,

y The main objects of this invention are:

Eirst, to provide a spring sash balance which is very compact when completely collapsed and at the same time is adapted for use on windows of different verticaldimensions.

`Second, to provide a sash balance which may be easily installed when the spring is adjusted. to the desired tension or the particular load incident to the particular installation.

Third, to provide a sash balance having these advantages which is economical in itsparts and inthe assembly thereof. l

Fourth, to provide a sash balance which operates freely even though great care is not exercised in, the installation thereof, thereby permitting installationv by relatively unskilled workmenY Objects relating to details and econom-iesof: the invention Willappear from the description to iollow. The invention is defined and pointedgout; ini

the claims. t

Preferred embodiments of the invention are illustrated in. the accompanying drawing. in. Whchr- Fig. 1 is a. fragmentary view partially in vertical. section of a window and window framey or casing with a balance embodying my iriventongin; operative relation thereto, the balance beingl shown in fully extended position as resultsfwhen. f

that of Fig. 1 with the window in fully open'po.

sition. 1

Fig.. 3 is an enlarged fragmentary view partially invertical section on` a line corresponding. toline 3 -F3of Fig. 1.

Fig. 4 is an enlarged horizontal section on line 4-4 of Fig. l.

Fig. 5 is an enlarged fragmentary view partially in vertical' section on line 5-5 off Fig.. 1.-.

Fig'isa fragmentary view of a modified*formV or embodiment of my invention, the modioation being inthe mounting bracket.

Fig. '7 is an enlarged fragmentary View partially in longitudinal'section of a modied. form or em bodiment of my invention,

In the accompanying drawing, t represents a window frame or casing and 2 a window sash having a groove 3 in the edge thereof. the groove being of such dimensions as to receive the sash balance.

The embodiment of my invention illustrated comprises a pairof telescopingly associated outer andl

inner tubularelements

4 and 5 respectively.

' The sleeve-like torsion memberl I2' is provided with an attaching arm 13.] This constitutes an attachingI bracket, the sleeve slidably embracing the outerelementlr. This torsion memberis pro vided with an` inwardly projecting lug-likemem-- ber L4' which engages the:v groove 6 in the outer tubular element 4, this groove-engaging member I4 being withinthe recessB and engaging the stop 9 when the balance is fully extended as shown in Figl 1;

At; itsV innerY end, the outer element 4- is provided n Withfa lug-likegroove-engaging member I5' which engages the groove. in the inner element 5 and when the balanceis fully extended, lies within the' recess llllandcoacts with the stop l-| tollimit the extension of the tubular elements.

The coiledwbalancingV spring I6 isv arrangeo` within the inner tubular element, theinner end ofthe spring beingengaged withY the clutch pin Il'extending inwardly from the support I8' which iS; secured.V within the inner-end of. the inner element 5 by striking a portion l Qthereof into a re cess 20 formed in the memberls. The lower end of the spring is engagedl with the innerend 2l of the tension rod 2.2, this inner end` 2| constitutinga. clutch pin. The tension rod extends through the bushing 23-in the outer end of the inner e1ementthe bushing' being held in place by the

indentation

2,4. engaging the slot 25 in `the bushing, see Fig; 5; y

The tension rod is pivotally securedv at Etf to the bracket 21 which, inthe embodiment illustrated, is; attachedto the bottom o1' lower end of the sash, as Shownv in: Fig; 1. It will be understood that theparts might` be reversed. The tension. rod: constitutes a. journal for` rotatably supporting` the outer end of4 the inner element 5.

In the embodiment shown iniFig. 6, the tension rod 39F is provided with a bracket extension 28 formedintegrally therewith.

The embodiment shown in Figs. l to 5, however. hasy advantages in that theparts are permitted to adjust themselvesto varying conditions. Without binding andlesscare is. required in installing both. these. embodiments'.

However, the desired.

tension is applied to the spring before the bracket is secured.

In the embodiment shown in Fig. 7, the inner tubular element has a sleeve 29 secured within the inner end thereof-in the structure illustrated by means of a lug 3E! struck into the slot 3 l. The lower end of this sleeve has ratchet teeth 32 with which the ratchet teeth 33 of the tension member 34 coact, this tension member being slidable within the tubular element and having a rod-like extension 35 on its upper end slotted to receive an k provide a spring clutch pin, a spring clutch pin adjusting tool 36. The inner end of this rod c onstitutes a clutch pin 31 for the inner end of there Y spring. With this arrangement, the tension .orVA y the spring can be adjusted after the has been attached. f t

With this arrangement of parts, the balance may be collapsed for shipment and storage, thus greatly reducing the packaging and shippingspace, may be quickly and easily installed in varying sizes of windows and adjusted or tensioned to provide the required counterbalancing tension or torsion on the spring. c

In operation, both inner and outer members are subject to the torsional stress ofthe spring and when the window is closed the members or *elements are extended. When the Window is open the elements are telescoped, as shown in Fig. 2;

I have illustrated and described certain practical embodiments of my invention which it is believed will enable those skilled' in the 'art to embody and adapt the same as may be desired.` I have not attempted, however, to illustrate other embodiments or adaptations which I contemplate.

Having thus described myY invention, what 1I claim as new and desire Patent, is: V r

1. In a sash balance, the combination l'of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove to secure by Letters extending substantially from end to `end thereof,

engaging member coacting with thegroove of saidy outer element, a bushing secured within the' outer end of the inner element, a second attaching bracket, a tension rod pivotedto said second at` taching bracket and journaled within said'bushl' ing and projectinginwardly therefrom 'to pro-'1 vide a spring clutch pin, a 'spring clutch pin secured within the inner end of saidinn'er element,

and a coiled spring arranged 'within said -inner element with its ends in clutching engagement' with said clutch pins, said groove engaging .members being urged into said re'cesses'byV said'spring and constituting detents coacting' therewith.

2. In a sash balance, the combination of vav pair of telescopingly associated inner and'outer tub'ular elements, each having a spiral groove'extending substantially from end to` end thereof, the' outer end of the groove of the'outer tubular element and the inner end of the groove of the inner element both terminating'inlateral recessesprovided with stops at their outerfends, said 'outer' element being provided withV an inwardlyproject-- ing groove-engaging vmember at its innerend co' j' bracket 2l v'secured within the inner end of said inner ele- -ment, and a coiled spring arranged within said inner element vwith its ends in clutching engage- -'icnentvvith saidk clutch pins, said groove-engaging members being urged into said recesses by said spring and constituting detents coacting there- With.

3. In a sash balance, the combination of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove of said inner ele ment, a torsion member constituting an attach.y ing bracket provided with a sleeve slidably receivm ing said outer element and provided with a.

4groove-engaging member coacting with the groove of said outer element, a bushing secured within the outer end of the inner element, a second attaching bracket, a tension rod pivoted to said second attaching bracket and journaled within said bushing and projecting inwardly therefrom to provide a spring clutch pin, a spring clutch pin secured within the inner end of said inner element, and a coiled spring arranged Within said inner element with its ends in clutching engagement with said clutch pins.

4. In a sash balance, the combination of'a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extend ing substantially from end to end thereof, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove of said inner element, a torsion member constituting an attaching bracket provided with a sleeve slidably receiv ing said outer element and provided with a groove-engaging member coacting with the groove of said outer element, a bushing secured within the outer end of the inner element, a tension rod provided with an attaching bracket and journaled within said bushing and projecting inwardly therefrom to provide a spring clutch pin, a spring clutch pin secured within the inner end of said inner element, and a coiled spring arranged within said inner element with its ends in clutching engagement with said clutch pins.

5. In a sash balance, the combination of ra pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, the outer end of the groove of the outer tubular ele ment and the inner end of the groove of the inner elementboth terminating in lateral recesses provided with stops at their outer ends, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove'of said inner e1ement and with said recess at the inner end there of, a torsion member provided with a sleeve slidably receiving said outer element and provided with a groove-engaging member coacting with the groovev of said outer element, an attaching bracket, a tension rod carried by said attaching bracket and constituting a journal for said inner element, and a coiled spring arranged within said inner element with one end connected to said tension rod and the other connected to the inner end of said inner element, said groove-engaging members being urged into said recesses by said spring and constituting detents coacting therewith.

6. In a sash balance, the combination of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove of said inner element, a torsion member provided with a sleeve slidably receiving said outer element and provided with a groove-engaging member coacting With the groove of said outer element, an attaching bracket, a tension rod carried by said attaching bracket and constituting a journal for said inner element, and a coiled spring arranged within said inner element with one end connected to said tension rod and the other connected to the inner end of said inner element.

7. In a sash balance, the combination of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, the outer end of the groove of the outer tubular element and the inner end of the groove of the inner element both terminating in lateral recesses, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove of said inner element and with said recess at the inner end thereof, a torsion member constituting an attaching bracket and with which said outer element is slidably associated and provided with a grooveengaging member coacting with the groove of said outer element, an attaching bracket for rotatably supporting said inner element, a coiled spring arranged within said inner element for applying torsional stress thereto, said groove engaging members being urged into said recesses by said spring and constituting detents coacting therewith, and means for adjusting the tension of said spring.

8. In a sash balance, the combination of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, said outer element being provided with an inwardly projecting' groove-engaging member at its inner end coacting with the groove of said inner element, a torsion member constituting an attaching bracket and with which said outer element is slidably associated and provided with a grooveengaging member coacting with the groove of said outer element, an attaching bracket for rotatably supporting said inner element, and a coiled spring arranged within said inner element for applying torsional stress thereto.

9. In a sash balance, the combination of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, the outer end of the groove of the outer tubular element and the inner end of the groove of the inner element being provided with stops, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove of said inner element, a relatively xed torsion member with which said outer element is slidably associated and provided with a groove-engaging-member coacting with the groove of said outer element, means for rotatablyksupporting said inner element, and a coiled spring arranged within said inner element for applying torsional stress thereto, said groove-engaging members being urged into said recesses by said spring and constituting detents coacting therewith.

l0. In a sash balance, the combination of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove of said inner element, a relatively xed torsion member with Which said outer element is slidably associated and provided with a groove-engaging member coacting with the groove of said outer element, means for rotatably supporting said inner element, and a coiled spring arranged within said inner element for applying torsional stress thereto.

l1. In a, sash balance, the combination of a pair of telescopingly associated inner and outer tubular elements, each having a spiral groove extending substantially from end to end thereof, said outer element being provided with an inwardly projecting groove-engaging member at its inner end coacting with the groove of said inner element, a relatively fixed torsion member with which said outer element is slidably associated and provided with a groove-engaging member coacting with the groove of said outer element, means for rotatably supporting said inner element, a coiledspring arranged within said inner element for applying torsional stress thereto, and means for adjusting the tension of said spring.

AUGUST VIEHWEGER.