US1588741A

US1588741A - Window-lifting device

Info

Publication number: US1588741A
Application number: US709177A
Authority: US
Inventors: Jones John Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-04-26
Filing date: 1924-04-26
Publication date: 1926-06-15
Anticipated expiration: 1943-06-15

Description

June 15 1926. 1,588,741

J. P. JONES WINDOW LIFTING DEVICE Filed April 26, 1924 s Sheets-Sheet 1 June 15 1926. 1,588,741

J. P. JONES WINDOW LIFTING DEVICE Filed April 26 {1924 3 Sheets Sheet 2 June 15 1926. I 1,588,741

J. P. JONES WINDOW LIFTING DEVICE Filed April 26 192 3 Sheets-Sheet 5 Patented June 15, 1926.

JOHN PAUL JONES, 0F CHARLESTON, WEST VIRGINIA.

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Application filed April 26,

The invention relates to new and useful il'uprovemcnts inwindow lifting devices, and more particularly to a window lifting device which is attached to and is a permanent part of the window sash.

An object of the invention is to provide a window lifting device whereby a lever is provided for lifting the window, which lever may be operated to lift the window step by step and which will permit the window, after it has been loosened, to be raised without releasing the lever.

A further object of the invention is to provide a lifting device of the above type wherein the lever may operate to hold the window in a predetermined raised posi tion, and wherein said lever may be readily moved to release the window to permit the lowering of the same.

A further object of the invention is to provide a window lifting device which has associated therewith means for locking the window in its lowered position, which looking means is so constructed that it can be readily operated by the hand of the person manipulating the lifting lever for raising the window.

In the drawings, which show by way of illustration one embodiment of the invention Figure 1 is a front view showing awindow sash having my improved lifting device applied thereto, the window being in lowered position and locked down;

Fig. 2 is a view similar to Fig. 1, but showing the locking device released prior to the raising of the window by the lifting lever;

Fig. 3 is a similar view but showing the lifting lever as having been raised and the sash lifted thereby as far as it can be lifted by one swinging movement of the lifting lever;

Fig. 4 is a similar view but showing the lifting lever as lowered so as to engage the fulcrum pawl on the end of the lever in the next higher tooth in the rack;

Fig. 5 is a View similar to Fig. 2, but showing the lifting lever depressed so as to release the holding pawl from the rack for lowering the window;

Fig. 6 is a view similar to Fig. 1, but

1924. Serial No. 709,177.

showing a slightly modified "form of bracket for supporting the lifting lever on the window sash;

Fig. 7 is a sectional view on the line 77 of Fig. 6. The invention is directed to a window lifting device which is carried by the window sash and includes two lifting levers, one on each side of the window. These lovers are mounted on suitable brackets rigidly attached to the sash. Each lever consists of a handle portion pivotally supported intermediate its ends, and a fulcrum pawl which is pivotally mounted on the outer end of the handle and which'is spring pressed in an inward direction. (Jo-operating with the lever are stops which limit the swinging movement of the lever and which operate through the lever to hold the window sash .in a predetermined raised position.

Associated with this window lifting device is a locking means for lockin the window in lowered position, which includes a spring pressed bolt or latch adapted to engage underneath a lug formed on the rack attached to the window frame and a lever mounted on the same pivot as the window lifting lever which is capable of being swun on its pivot, and when so moved operate through suitable devices to withdraw the latch so as to allow the window to be raised.

Referring more in detail to .the drawings, the window sash is indicated at 1, and the window frame at 2. The sash 1 slides in the usual recesses provided therefor in the window frame 2. Mounted on the sash is a bracket 3 which may be secured rigidly to the sash by any suitable means. Mounted on this bracket plate is a lever 6. Said lever is pivoted to turn on a stud 7 located intermediate the ends of the lever.

The inner end of the lever is formed with a cut-away or dished out portion 8 so as toprovide a suitable hand hold for operating the lever. outer end of thelever is a fulcrum pawl 9. This pawl 9 has its upper and lower faces inclined relative to each other. The pawl is adapted to engage the teeth 10-10 of a rack bar 11 rigidly secured to the side frame of the window casing. A spring 12 rigidlysecured by suitable screws 1313 Pivotally secured on the on the handle 6 is bowed outwardly and upwardly, and the extreme outer end of the pawl 9 rests on this sprin This spring tends to force the outer end in an upward direction, turning said pawl on its pivotal support 14, and the upward movement of the pawl is limited by means of a shoulder 15 on said pawl member engaging the shoulder 16 on the handle.

When the parts are positioned, as shown in Fig. 1, the pawl rests on one of the teeth of the rack bar. It will readily be seen that an upward pull on the handle 6 will cause the pivotal connection 7 between the handle and the window sash to be lifted. The said handle becomes a lever of the second order with its fulcrum on the rack. The length of the lever between the pivotal point and where the end engages the rack is much less than the distance between the point where the end en ages the rack and the end of the handle an therefore, a great deal of leverage is provided for the raising of the window sash. When the window has been raised to the position shown in Fig. 2, the handle strikes the stop 17 which prevents any further upward movement of the lever. If the window sash has been loosened so that itmay be readily lifted by a gentle lift on the two handles, one at each side of the sash, then the fulcrum pawl 9 will ride the teeth of the rack and the window sash may be raised to any desired height.

If, however, the window still sticks, then the handle may be dropped, as shown in Fig. 3, and this will cause the stop pin 18 to engage the pawl at a point beyond its pivotal connection 14 to the handle and press the same downwardly against the action of the spring 12. When the handle 6 is again raised, the pawl 9 will move over the next tooth of the rack, as clearly shown in Fig. 4. The handle may now be again lifted, and the window sash raised to another predetermined position. If the window sash is i now raised to suflicient height, then the weight of the sash bearing on the pawl 9 through the aid of the pin 18 will support the sash by the tooth engaged by the pawl.

In order to lower the sash, the lever handle is pressed downwardly until it engages the stop 19, and this will cause the pawl to move along the stop pin 18 and withdraw the extreme end thereof from engagement with the rack, and the sash may be readily lowered. It is understood, of course, that there is a Window sash lift at each side of the window. Associated with the window lifting devices is a window locking device for locking the window in its lowered position. Said locking device consists of a sliding bolt or latch 20 mounted to move freely in a horizontal direction in a housing 21, which is rigidly secured to the bracket 3. There is a spring 22 in the housing which bears against the inner end. of the housing and also against a head 23 formed on the end of the sliding bolt or latch 20. At the lower end of the rack and below the teeth 10 thereof, is a projecting shoulder 24. The latch or lockin bolt engages underneath this shoulder w en the window sash is in" its lowered position and thus locks the window sash down. The locking bolt or latch is operated by means of a lever 25 which is pivoted at 26 to the extreme inner end of the bolt or latch. Said lever is pivoted at 27 to the bracket 3 and is formed with an upwardly projecting arm 28. Mounted on the pivot 7 is a second lever 29 which swings freely on the ivot. Said lever is formed with a cam en 30 which is adapted to enga e the extension 28 of the lever 25. The rig t-hand' end of the lever 29 is adapted to move up into the housing in the lifting lever 6. Said lever normally projects slightly below the lower face of the lever 6 and when the operator grasps the lever 6 for the purpose of lifting the window, he also grasps the lever 29, and, turning said lever 29 in a counter clockwise direction on the pivot pin 7, causes the cam 30 to move along the extension 28, depressing the same, as clearly shown in Fig. 2 of the drawings. This depressing of the lever 25 withdraws the latch from beneath the locking shoulder or lug 24. The lifting lever can be manipulated, as described above, while at the same time holding said locking bolt or latch in released position. The cam 30 moves over the top of the extension 28, when in its extreme upper position and this holds the bolt withdrawn.

The lifting lever 6 is turned to its extreme upper position, as shown in Fig. 3, and thus the sash is raised one step. The lever then contacts with the stop 17, as has been described above.

In Figs. 6 and 7 of the drawings, I have shown a slightly modified form of supporting means for the lifting and locking devices. In place of a single plate bracket, as shown above, I have provide a housing 31 which is rigidly secured to the window sash. The locking lever and the fulcrum pawl manipulated thereby are located within the housing between the front and rear plates thereof. The releasing lever 29 is likewise located in the housing and fulcrumed on the same pin which supports the lifting lever. The parts are therefore, enclosed within the housing. The front and back plates of the housing are connected by

side plates

32 and 33. The side plate 32 is cut away so as to permit the levers to project from the housing. Side plate 33 is cut away so as to permit the pawl 9 to extend therethrough and engage the rack on the window frame. It is likewise cut away so as to permit the bolt to project through and engage the locking lu 24. It will, be noted that the head 23 of t e locking bolt or latch is beveled on its under face so as to permit the bolt to readily run over the teeth of the rack for the locking lug when the sash is lowered until it reaches a position where it may be projected underneath the hold down lug. The lower edge of the upper portion of the side plates 33 takes the place of the stop 18 and operates to depress the pawl 9 when the lifting lever is swung for releasing the window. The upper edge 34 of the side plate 32 takes the place of the stop 19 and limits the downward swinging of the levers when releasing the pawl from the rack. The

lower edge 35 of the upper portion of the side plate 32 takes the place of the stop 17 and limits the upward movement of the lifting lever when raising the sash.

The lever which looks the sash in lowered position at each side of the window sash may be simultaneously operated by the hands of the person desiring to open the window, so as to Withdraw the locking bolts. The lifting lever may then be raised and said levers at the two sides of the window will pry up the sash to a position shown 1n Fig. 3 of the drawings. The swinging of the lifting lever holds the latch or bolt withdrawn. If the sash is loosened an upward lift on the levers will raise the sash to any desired height. The lowering of the lifting levers for the window sash will project the pawl forward over one of the teeth 10 in the rack and the window will be supported by the lifting devices. The pawl w1ll swing until the shoulder on the pawl engages the shoulder on they lifting devlces and the weight of the sash is then supported by these lifting devices. If it is desired to lift the window another step by reason of the fact that it has not been sufficiently loosened to be readily raised, then the lifting device is swgng to the position shown in Fig. 4.

The releasing of the window lifting device will cause the fulcrum pawl to move over the top of the next high tooth, which serves as a fulcrum for the lifting of the window sash, another step.

It is obvious that minor changes in the de tails of construction and arrangement of parts may be made without departing from the spirit of the invention as set forth in' the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: I

1. A window lifting device comprising a bracket adapted to be attached to the window sash, a lever pivoted intermediate its ends on said bracket, afulcrum pawl pivotally carried by said lever at its outer end and adapted to engage a rack bar on the- .Window frame, and means for limiting the movements of said pawl, whereby said lever with the (pawl resting on the rack bar may be utilize to pry up'the window sash.

2. A window lifting device comprising a bracket adapted to be attached to the window sash, a lever pivoted intermediate its ends on said bracket, a fulcrum pawl pivotally carried by said lever at its outer end and adapted to engage a rack bar on the window frame, means for limiting the movements of said pawl whereby said lever with the pawl resting on the rack bar may be utitilized to prv up the window sash, a locking latch holding the sash in lowered position, a lever located in a recess formed in the first-named lever and adapted to turn on the pivot of said first-named lever, said last-named lever being provided with means for withdrawing said latch, said parts being so constructed and associated that the latch withdrawing lever may be first turned on its pivot into the recess of the lever on which it is mounted, and thus withdraw the latch after which the first-named lever can be swung on its pivot to pry up the window.

3. A window lifting device. comprising a bracket adapted to be attached to the windown sash, a lever pivoted intermediate its ends on said bracket, a fulcrum pawl, pivotally carried by said lever at its outer end and adapted to engage a rack bar on the window frame, means for limiting the movement-s of said pawl, whereby said lever with the pawl resting on the rack bar may be utilized to pry up the window sash, and a sprlng adapted to engage said fulcrum pawl for lifting the outer end thereof.

4. A window lifting device comprising abracket adapted to be attached to the window sash, a lever pivoted intermediate its ends on said bracket, a fulcrum pawl pivotally carried by said lever at its outer end and adapted to engage a rack bar on the window frame, means for limiting the movements of said pawl, whereby said lever with the pawl resting on the rack bar may be utilized to pry up the window sash, a spring adapted to engage said fulcrum pawl for lifting the outer end thereof, said lever and fulcrum pawl carrying the co-operating stops for limiting the upward movement of the fulcrum pawl through the action of the spring.

5. A window lifting device comprising a bracket adapted to be attached to the window sash, a lever pivoted intermediate its ends on said bracket, a fulcrum pawl pivotally carried by said lever at its outer end and adapted to engage a rack bar on the window frame, means for limiting the movements of said pawl, whereby said lever with the pawl resting on the rack bar may be utilized 'to pry up the window sash, a spring adapted to engage said fulcrum pawl for lifting the outer end thereof, said lever and fulcrum pawl carrying the co-operating stops for limiting the upward movement of the fulcrum pawl through the action of the spring, a stop carried by the bracket for engaging said fulcrum pawl when said lifting lever is depressed for placing said pawl on a higher tooth of the rack bar.

6. A window lifting device comprising a bracket adapted to be attached to the window sash, a lever pivoted intermediate its ends on said bracket, a fulcrum pawl pivotally carried by said lever at its outer end and adapted to engage a rack bar on the window frame, means for limiting the movements of saidpawl, whereby said lever with the pawl resting on the rack bar may be utilized to pry up the window sash, and a stop carried by the bracket for limiting the upward movement of said lever.

20 7. A window lifting device comprising a bracket adapted to be attached to the window sash, a lever pivoted intermediate its ends on said bracket, 9, fulcrum pawl, pivotally carried by said lever at its outer end and adapted to engage a rack bar on the window frame, means for limitin the movements of said pawl, whereby sai lever with the pawl resting on the rack bar may be utilized to pry up the window sash, a spring adapted to engage said fulcrum pawl for lifting the outer end thereof, stops carried by the bracket for limiting the upward swinging of the lever when raisin the window sash and for limiting the t lownward movement of the lever when releasing the fulcrum pawl from engagement with the rack.

In testimony whereof, I afiix my signature.

JOHN PAUL JONES.