US1570654A - Lock mechanism for slidable windows - Google Patents

Description

2 Sheo'cr-Sheot 1 'jW:-.-c. WALLACE Filed Dec. 1, L928 ATTORNEY Jan. 26, 1925.

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w. c. WALL ACE LOCK MECHANISM FOR SLI DABLE WINDOWS m Filed Dec. 1, 1923 2 Sheets-Sheet 2 Patented Jan. 26, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM CARLILE WALLACE, OF NEW YORK, N. .Y;, ASSIGNOR OF- ONE-HALF TO JOSEPH E. GARRABRANT, OF NEW YORK, N. Y. r

- LOCK MECHANISM non s InABLE'wINDows.

' Application filed December To all whom it may concern: a

' Be it known that I, WILLIAM GARLILE WALLACE, a subject of the King of Great Britain, and resident ofthe borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in Look Mechanism for Slidable WVindows, of which the follow 111g is a specification.v

This invention relates to window raising, lowering and locking means, and'my improvement is directedto certain simple control mechanism of novel character which is easily manipulable under a moderate amount of force to perform the operations of window opening and closing. I V

' While capable of employment with various types of slidable windows, my invention is particularly adapted for use in conjunction with the windows of motor car doors, with which it is especially desirable that the operation thereof be, attended with great ease, and also that the window should stay in any set partlyopen or closedpositions without the application of any locking means other than is comprised in the organism ofth'e operating mechanism.

' Briefly expressed, my invention comprises aheemployment of an articulate member,

such as a chain, composed of pivotal links,

' and operable in straight line movement to downwardly. I have found that by placing a straight length of link chain in atube or channel of suitable cross-sectional dimensions for its parallel walls to serveas guides, that the chain will function like a stiff plunger when it is subjected to a pushing 3 eiiort. Therefore, while the window can be pulled by the chain in one direction, it can also be pushed by the same chain in the other direction.

Further my invention comprehends the employment of a two-part wedge device, operable within the chain containing channel and constituting the means of'connection be tween the chain and window; This wedge device is effective as such to hold the'window in a set position, either partly open Figure 1.

1, 1923. s erial'No. 677 ,927. I

or closed, under the influence of gravity providedby the Weight of the window.

But the wedge device is of such character as to become released both when the chain ispulled upon to open the window and when the chain 'is'pressed against this wedge device, thereby enabling a pushing action of the chain to move the window downwardly. Hence, the window can be easily opened by "pullingupon the chain and can be closed Figure 3 is' a section' on the line 3 3 of Figure 1. V J "Figure 4 is an'enlarged'detail view in elevation, showing the operating chain, the channel therefor, and the tensioning means. IFigure 5 is a detail, side view, partly-in seetion,'on astilllarger scale, showin'g'the wedge device; bothpull a window upwardly or to push'it wedge releasing operation influenced by downward push of the chain, and

Figure 8 is a section on the line 8'8 of Figure 5.

In said views, let 1 indicate a motor car door, or other frame for a window 2 which is to be capable of being raised or lowered. With motor car doors the window 2 is usually a, plainvs'heet of glass that runs in guides 3, 3, and is fixed in a base channel 4. This channel is hereshown as provided with a lug 5, that engages a' spur.6, extended from the base portion 7 of a' wedge member 8, which is slidable in a guide or channel 9.

section on the line 22 of As is well known the front and rear panels and 11 at the lower part of motor car doors are separated by a space which serves to receive the lowered window, and this space also accommodates the operating mechanism.

A, complementary wedge member 12 having a head portion 13 is fitted loosely 1n channel 9, the head portion 13 lying between the end of; wedge member 8, and "the terr minal portion of a chain 14, which chain is slidable within the guide orchannel 9. The wedge element-s 8 and12 at their-oppositely inclined meeting surfaces, are pro vided with a raceway 15, containing 'balls16, to lessen the friction between them, and said wedge e1en1ents' a re normally urgedint a .wedg ng action within the channel 9 by means of a spring 17 iiiterposed between head portion 18 and'the opposed end otwedgememher 8. Therefore, when the apparatus is in a state of restthewedge is expanded into frictional contact with the sides ofchannel 9, thus providing a loekto hold the window in a set vertical position, either closed or partly open,

The window can not be moved fromthis set position without recourse first being had to means for releasing the wedge, because downward pressure or vibratory influence, applied directly to the window, will mere- 1y have the effect of tightening the .wedge and locking it more securely.

The chain 14, movable in channel 9, constitutes the actuating medium for the wedge, as well as, servingfto transmit the force wherewith thewindo'w is raised and lowered.

One end of this chain is secured, as at 18,

to a fixedframemember 19 andtheother end is engaged with the upper portion of wedge element-8. The manner of this engagement, ashereshown, is of special character. Thus, the upper port-ionof wedge element 8 is reduced laterally to provide clearances for the accommodation of . side bars 20, 20, of the terminal chain link, re spectively between its sides and the sides of channel 9, these side, bars being provided with aligned, longitudinal slots 21,21, which receive the projecting ends of a pin 22, that extends transversely. through wedge element 8.

The chain 1 1 is shown as engaged with a spur wheel 23, carried by a shaft 24:, here indicated as journalled in a bearing 25,

that is secured to the frame member 19 and.

located near the upper end of channel 9. Ahandle 26, attached to shaft 24, enables the spur wheel to be rotated, in either direction, for movement of the chain 14 with in channel 9. Theslack of the chain is taken up by an idler27 that is mounted on an arm 28, said arm being pivoted to the frame 19 at 29 and yieldingly extended by a tensional member 30. The tension thus applied serves also to partly balance the weight of the window.

The operation of my improved window control device is as follows: When the chain 14 is drawn upwardly within channel 9, as by rotating spur wheel 23 in one direction, the-first effect is the movement of side bars 20 until the lower ends of their slots 21 engage the projecting ends of pin 22, (see Fig. 6. -whe'reuipon a. continuedupward pull of the chain first releases the wedging effect of elements 8 and 12, and then freely lifts the window to the desired partly or fully closed. position. hen the pulling effort ceasesth'e weight of the window causes the wedge element 8. to re-engage wedge, element 12, aided by theiwedgesspreading influence of spring 17. if i In orde'r tolower the window, the spur wheel 23 is rotated in the opposite direction, to impart downward movement to chain it in channel 9, the slots21, in this action, descending over the ends of pin 22, until the lower ends of side bars 31,31, forming part of the adjacent link, come. into contact with the top of wedge portion 13, and by continued ,downwardl pressure, compressing spring 17 and releasing the engagement of wedge elements 8. and 12; the continued downward pressure thenceforward necessarily having the effect ofloweringthewindow to the desired degree of opening, When the downward pressure is relieved the wedge lock again becomes effective in the manner before described.

The channel opening is guarded by partly coveringplates 32, 32, which leave between them a narrow opening, sufiicient in extent for the travel of-spur 6.

The chain 14, as confined within the channel 9, is as effective under a pushing effort as a rigid bar would be, and thereby enables me to utilize a single chain length for the dual purpose of pulling a window up and pushing it down.

Variations within the scope and spirit of myinvention are equally comprehended by the foregoing disclosure;

I claim:

1. Locking means adapted for usein connection with a sli'dable window having -a guide channel and control means, said looking means comprising a wedge connecting element in said. channel between the window and control means, a complementary wedge element in said channel, and .spring'means to normally expand said wedge elements in the channel, to lock the windowv in a set position, said wedge elements being contractible to release the window by movement in either direction of the control means.

2, Lockin means adapted for use in connection with a slidable window havinga guide channel and control means, comprising a two-part wedge device within said Ill) "names i channel, one part of said wedge device having means of connection with the Window, and also having means of engagement; capable of limited slack movement with the control means, the other part of the Wedge device being free Within the channel, and

spring means to normally extend the parts of the Wedge device to frictionally bind it Within the guide channel thereby locking the Window in a set position.

Executed at New York this 9th day of November, 1923.

WILLIAM GARLILE XVALLAGE.

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