US1628346A - Sash lock and counterbalance - Google Patents

Description

1 May 927 w. w. WHITE SASH LOCK AND COUNTERBALANGE 2 Sheets-Sheet 1 Filed March 13. 1926 Hi 4 7 HI 7 Z I i|||| Z Ill andfill/Ill May 10, 1927.

W. W. WHITE SASH LOCK AND COUNTERBAIJANCE Filed March 13, 1926 2 Sheets-Sheet 2 Inventor Wnz 71 /1222,

Attorney Iii Patented May 10, 19237.

WILLIAM WALTER WHITE, or Los ANGELEs, CALIFORNIA.

SASH LO CK AND COUNTER-BALANCE.

Application filed March 13, 1926. Serial No. 94,476.'

r One of the objects of my said inventionis the provision of a simple, easily controlled and highly eliicient sash lock." e Another object of mysaid invention is the provision of a peculiar and advantageous combination sash, loclcand counterbalance for lower and upper sashes. V

Other objects and practical advantages of the invention will be fully understood from the following description and claims when the same are read in connection with the drawings, accompanying and forming part of this specification, in which Figure '1 is an elevation illustrating a sash frame and sashes equipped in accordance with one embodiment of my invention. Figure 2 is an enlargedyertical section showing one of the sash locks. s 1 Figure 3 is a horizontal section taken in the plane indicated by the line 33 of s elv r Figures 4, 5 and 6 areviews illustrative of a modification or elaboration of the invention in which provision is made not only for locking the sashes but for counterbalancing the same. H V I Figure 7 is a detail perspective of one of the'lockingv bars hereinafter explicitly referred to.' a v Figure 8 is an enlarged fragmentary view showing one of the anti-friction rollers complementary to the sashes; I p Similar numerals designate corresponding parts in Figures 1, 2, 3, 7 and 8 to which reference will first be made. I I show in Figure 1 a sash frame 1 in which are arranged slidable sashes 2 and 3, each of the said sashes 2 and 3 having housed in one of its vertical edges antifrietion rollers such as 4, the said anti-fric-e tion rollers 4 being opposed to the adjacent stilesof the'frame 1 and being adapted to ease the vertical movement of the sash.

My novel sashlocks are arranged at the opposite sides of thesashes 2 and 3, with reference to the anti-friction rollers 4, and there is one'of the said locks complementary to each sash, The said locks are identical in construction and therefore a detailed description of the lock shown in Figures 2, 3 and Twill suifice to impart a definite understanding of both. By particular reference to Figures 2 and 3 it .will be noted that the sash has countersunk in one vertical edge thereof vertical rack 5 and it will also be noted that an appropriate casing 6 is 20' opposed to the periphery of the'gear 8 and 1s adapted to be moved into and out secured in the ad acen t stile of the frame 1, the said casing 6 having an opening 7 confronting the rack 5 and adapted for the play of the gear 8 of my improvement, said gear 8 being meshed with the -rack 5 as best shown in Figure 2. The gear 8 is mounted to rotate in the casing 6 and is formed 'inte gral with or appropriately fixed withrespect to a drum 9 at its side,.the said drum 9 being used in conjunction with a friction band 10, connected atone end 11 to the cas ng 6 and having its other end subject to theaction of an expansion spring 12 on a headed rod-like support 13, earr'ied by the casing 6. "l\ianifest1y the spring 12 will operate to hold the band 10 under yielding pressure againstthe perimeter of the drum 9, so that the gear 8 in cooperation with the rack 5 will prevent casual gravitation of the sash and will also 'prevent too free endwise movement of the sash in either direct on. For use in conjunction with the gear 8,1 provide a bar 20', pivotally connected ati2l and having a recessed and toothed edge portion 22, and also having a depression 23 in its opposite edge, with ref erence to said depression, 22. c

The toothed depressedportion of the bar of engagement with the teeth of'sa'id gear. iVhen engaged with the gear 8; the bar 20 will manifestly prevent rotation of the gear andin that way will effectively lock the sash either aga instupward movement or downward movement. Interposed between and connected to the bar 20fand an abutment 25 in the casing 6 is an expansion spring 26 which tends t'othr'ust the bar 20 away from the peripheryof the gear 8. ,At 21 in the casing 6 IS a stop,]and at 28 in said casing is pivotally mounted ado tent 29 which is preferably shaped as illustrated in Figure 2. The said detent 28 has a stem portion adapted to engage the depression 23 in the edge of the bar 24, and said detent also has a Y-shapedhead for c0013 eration with the stop 27 and the bit 30 of a key which key is adapted to be introduced through a ,keyhole provided in the casing 6 and manipulated in the manner common to a" door key. Assbefore stated the bar 20 is normally maintained by the spring 26 out of engagement: with the teeth of the gear 8. flVhen, 7 however, a key, is introduced into the casingand' is turned in one ill direction, thedetent will be swung by the bit of the key to the position shown by full lines in Figure so as to move the bar 20 into locking engagement with the gear 8. hilanilestly in said position of the parts the sash connected with the gear 8 will be l' ly locked against movement in either direction. When, however, the detent 528 is swung to the position shown by dotted lines in Figure 2- so that said detent abuts against the stop 27, the spring 2-6 will operate to disengage the bar 20 from the gear 8, and the sash may thenvbe raised or lowered as desired. it will be uni'lerstood from the 'l'oregoing that both movements of the detent are ollei-led through the mediun'i ol', the key; and it will also be mai'iil'est that by virtue of my improvement either sash may be quickly and strongly locked at various heights as desirable for ventilation purposes.

In the embodimei'it illustrated in Figures =1-l, 5 and 6, a single casing (3 ie 'n'ovided l in conjunction with the two slid-able sashes ment in either direetioi'i.

it and a, The said casing is provided with a keyhole ill) and the sashes are provided with racks 5 arranged. in parallel vertical planes, Figure 0. Gears 8" are mounted in the casing ti and are meshed with the racks 5, and itwill be noticed that the shafts S which carry the gears 8* are equipped with inl'vermeshed spur gears 8 so that the gears- 8 will turn in concert and when one of the gears S is at rest the other gear 8 will also be atrest. It will also be under stood from li'gurc 5 that a locking bar similar to that before described is employed in conjunction with one oi the gears 8, the said locking bar 20 being similarly constructed to the bar 20 of Figures 2 and 7, and a spring 26 and a detent 28 similar to those before described being used in conunction with the bar 20.

By virtue of the construction illustrated in l igures el, 5 and (i, the sashes are onabled to counterbalance each other, and when one sash is moved upwardly the other sash will be moved downwardly and vice 'versa; and it will also be appreciated that when the locking bar 20 is engaged with one ()It' the gears 8", both gears S will be strongly held against rotation, and both sashes will be securely locked against movelVhen, however, it is desired to render the sashes free :tor uujivcment, it is simply necessary for the operator to introduce a key through the keyhole 30, and manipulate the detent 538 so that the spring 26 can expand and press the bar 520 out of engagement with the adjacent gear 8, whereupon the sashes will be rendered :lree and both sashes may be moved in concert and in opposite directions by stress applied to one of said sashes.

It will be appreciated from the foregoing that both en'ibodiments of my invention are simple and compact in construction and are devoid of delicate parts such as are likely to get out of order after a short period of use.

I have entered into a detailed description of the construction and relative arrangement oi the parts embraced in the present and preferred embodiment of my invention inv order to impart an exact understandingott said embodiment. I do notdesire, however, to he understood as limiting myself to the specific construction and relative arrangeiug doliued by my appointed claims within the scope oi? which changes in structure and in arrangement may be made without departure from my invention.

Having described my invention, What I claim and desire to secure by Letters Patent, is:

1. In combination, a sash frame, a slidable sash, a rack carried by said sash, a casing housed in one stile oi" the frame and having a key hole, a gear mounted in said casing and meshed. with said rack, a locking bar pivoted at one end in the casing and having a recessed and toothed edge portion movable into and out of engagement with the teeth of the gear and also having a depression in its opposite edge, spring means tending to thrust said bar out of engagement with the gear, and a pivoted detent mounted in the casing and adapted in one position to hold the bar in engagement with the gear and in another position to permit movement of the bar under the action of the spring out of engagement with the gear; said detent being operable by a key introduced through the keyhole in the casing.

2. In combination, asash frame, a slidable sash, a rack carried by said sash, a casing ment of parts as disclosed, my invention be housed in one stile of the frame having a hey hole and also having a stop, a gear mounted in said casing and meshed with said rack, a locking bar pivoted at one end in the using andhaving a recessed and toothed end portion movable into and out of eng a ement with the teeth of the gear and a so having a depression in its opposite edge, spring means tending to thrust said bar out of engagement with the gear, and a pivoted detent mounted in the casing and adapted in one position to hold the bar in engagement with the gear and in another position to permit movementof the bar under the action oi the spring out of engagement with the gear; said detent being introduced through the keyhole in the easing, and said detent being of general Y-forin and arranged to cooperate with a stop in the casin and the depression in the toothed bar.

3. The combination of a sash frame, slidoperable by a key able sashes in said frame and movable in parallel planes and equipped With racks,

gears mounted in one of the stiles of the frame and meshed with the'racks of the sashes and connected together whereby they are caused to turn in concert, a casing containing said gears and having a keyhole, and

means controllable by a key introduced through the key hole of the casing and arranged to cooperate with the teeth of one of 10 the gears for the positive locking of the gears.

In testimony whereof I aifix my signature.

WILLIAM W. WHITE.

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