US1905876A - Automatic window regulator - Google Patents

Description

April 25, 1933. E. ACKERMAN AUTOMATIC WINDOW REGULATOR 2 Sheets-Sheet 1 Filed Sept. 25, 1929 llll 3/ //L. W w

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April 25, 1933. E. L. ACKERMAN AUTOMATIC WINDOW REGULATOR Filed Sept. 25, 1 929 2 Sheets-Sheet 2 w INVENTOR. Zak 17w A kw em/v W Z M ATTORNEY.

Patented Apr. 25, 1933 EDWARD L. AoKnRMAmor nnrnorr; MICHIGAN, AssreNoa To ACKERMAN-BLAESSER-; rEzzEY, INCORPORATED, or DETROIT, MICHIGAN, nooaroaarron 0F MICI-IIGAN 1 .AUTOMATIQ WINDOW REGULATOR Application filed September 25, 1929. Serial No. 394,947.

This inventionrelates to. window regulators, and the object of the invention is to'provide a window regulator in which the window may be manually lowered against a spring of sufficient tension to automatically raise the window upon release and in conjunction therewith to provide a friction brake or lock device through operation of,

which the window may be automatically raised from a lowermost position to anyv predetermined point or to fully-closed position.

In the usual apparatus for raising or lowering a window it has generally been the which requires to be rotated in one direction or the other to efiect operation of the winwhat may be termed a friction brake device by means of which the rapidity of movement of the window toward the closed position by the spring may be controlled and by means of which it may be effectually locked against such movement.

These objects and other features and novelties of the invention arehereinafter more fully described and claimed, and an auto- -regulator showing the same in relation to awindow sash, a portion only of which is shown. v v 3 Fig. 2 is a plan view of my improved regulator. V

Fig. 4: is an elevation partly in section-on an enlarged scale taken from the left side of Fig. 1. v

Fig. 5 is a section through the. friction '2 etc., by means of which it may be secured V Fig. 3 is an enlarged section taken on line 33 of Fig. 1.

for. V i. i Fig. 6 is an elevation of anadjustable portion of the brake device carrying a friction ,Fig. 7.

Fig. 9 is a section taken on line 99 of Fig. 7. practice to provide a crank operated device Fig. 10 is a detail in spring adjusting tool.

In 1ts preferred form the device consists perspective of the brake device and the operating means there- I of a base 1 which is in theform of a sheet 7 metal plate having a series of apertures 2,

to the cross bar of the window recess, usually termed thelock board (not here shown), in automotive vehicle window construction.

Toward the lower end of this plate there is an aperture to receive a stud generally indicated at 4 which is formed with a cylindrical portion 5 fitting the aperture in the plate 1 in which the stud is revolvable.

At its inner end 6 the stud is formed with flattened sides fitting. a correspondingl form-ed aperture in the sash engaging arm and is peened or headed thereover as at 8 securing the arm between the peened over head and'a shoulder formed by the part 5.

The large cylindrical portion 9 of the stud extends through a cylindrical aperture in an tCl]11Sl3lI1g gear 10 which is revolvable on this cylindrical portion 9 and lies practically in side engagement with the plate 1 as shown in Fig. 3. The stud extends outwardly from this portion 9 by a reduced diameter portion 11 slotted to receive an end 12 of the flat spiral coiled spring 18. A stud 14 is. secured,

to this gear 10 and is slottedto receive an end 12 of the spring 13. This gear 10 is further provided with a series of apertures 15 arranged in a circle adjacent its toothed periphery for the reception, of a screw 16 which may be inserted therethrough and into a threaded aperture in the plate 1 registering therewith as will be understood from 4.

' to overbalance the weight of the sash where upon the screw 16 is again inserted through an aperture 15 and the parts maintained in the adjusted relationship. The regulator arm 7 which is fixed to the stud 4 has on its long end a roller 22 of the necessary form to engage the bottom edge of the sash indicated generally at 23 in Fig. 1.

This arm 7- also carries a half circular metal strip 24 attached ateach of its ends to-the regulator arm equi-distantly from the stud or pivot point of the arm. This half circular strip 24 extends upward across the back of the plate 1 between the frictiondisc 25 secured in the plate 1 and the friction disc 26 secured in the movable holder 27 which is supported on the inner end of a shaft 28 extending through an aperture provided therefor towards the upper end of the baseplate 1 and through the inner facing 29 forming the inner wall of the sash recess in which the regulator is mounted as is commonly the practice. On this shaft 28 is a cylindrical member 30 which extends into the said aperture in the base plate 1 and is pe'ened thereover as shown at 31 in Fig. 5.

This end of the member 30 is formed with a recess 32 shown in the said figure adapted to receive one end of the coiled spring 33 mounted on the end of the shaft 28, the opposite end thereofengaging against the holder 27. The holder 27, as shown in Fig. 6, has a squared aperture 34 fitting a squared portion 35 t me shaft. Above the recessed portion 36 of the holder 27 in which the friction plate 26 is secured, the holder is provided with two spaced prongs 37 and 38 which are inturned and then upwardly bentto engage in recesses formed by the struck up lugs 39 and 40 of the plate 1. These lugs are positioned above the recess 41 in which the friction plate 25 is securedas will be understood from Fig. 5. These recesses formed by the lugs 39 and 40 maintain the holder 27 from rotation and, 1

due to the squared end of the shaft28 extending through the squaredaperture 34 of the holder, the said shaft is held from rotation and thus the movable'friction device is always maintained in the same position irrespective of the position of the sash. In other words,the holder 27 is held from rotation by the two lugs 39fand 40 and by reason of its having a squared aperture 34in which'the squared portion 35" of theshaft 28 fits, the

shaft is held'from rotation thus permitting the member 43 to be turned in either direction without rotation of the shaft 28 or displacement of the holder 27 from its position. The spring 33 tends at all times to move the holder and friction plate 26 out of contact with the half circular strap 24. The shaft 28. is threaded at 42 and a control knob 43 has a threaded aperture to rec-eivethe same. This be turned in the .opposite direction to release the same to a greater .or less degree to permit movement of the sash by the regulator arms.

It will be observed from the foregoing descriptionthat, with the spring 13 tensioned to'overbalance the weight of the sash, it will at all times tend to raise the'sash to closed position. This sash is movable downwardly in any convenient mannerat which time the friction brake mechanism is in released condition and whenthe sash has been'moved to the desired'relation with the window open-'v ing the knob is turned to cause a binding engagement of the friction plate 26 with the strap 24 which also causes the strap 24 to come into tight engagement with the friction plate 25 carried by the plate 1. This, under proper pressure, will prevent automatic movement'of'the sash bythe spring, the strap 24 being gripped between two surfaces which may be "of any approved material adapted for this purpose; Upon releasing the knob 43 by unscrewing the same relative to the shaft 28, the spring 33 will move the holder 27 "to the left in'Fig. '5 spacing the same from the ring memberor strap 24 and also release the same from frictional engagement with the friction plate 25. This will permit the" spring to operate and raise the sash and depending upon the degree to which the holder 27 is released the sash will move rapidly or slowly as may be desired.

From the foregoing description it is believed evident that the device is very simple in construction being of few parts principal-J ly formed of stamped sheet metal and therefore of comparativelyinexpensive construction, and that by the relationship of the parts described an automatically operating window regulator is secured.

Having thus briefly described my invention, its utility and mode of operation, what I claim andrdesire tosecure by Letters Pat entf-of' the United" States "is- 1. In sash operating mechanism, a pivoted arm in operative engagement with the sash, a spring having a tension suflicient to auto-' matically turn the arm to raise the sash, an arcuate strip attached to the arm, a base plate on which the arm is pivoted, a friction device including a friction plate on the base plate the face of which is practically in registration with the face of the strip, a second friction plate movable into or out of frictional engagement with the arcuate strip to hold the arm from movement by the spring or release it to movement thereby, yieldable means tending to separate the friction plates, and manually operable means for moving said second friction plate into contact with the arm.

2. In sash operating mechanism in which a spring-actuated arm is utilized to move the sash in a vertical plane, a control device by means of which the arm may be released to operation by the spring or locked in position to pivotal movement of the sash in either direction comprising an arcuate strip, the opposite ends of which are connected respectively to the arm on opposite sides equidistantly from the pivot point, a friction device through which the arcuate strip is moved on the turning of the arm on its pivot, said friction device comprising a friction plate secured in the base plate at a distance from the pivot point of the arm equal to the radius of the strip and in close association with which the strip is positioned, a shaft extending through the base plate and having a squared end, a holder having a squared aperture fitting the squared shaft, a second friction plate carried by the holder on the opposite side of the arcuate strip from the first named friction plate, a spring tending to move the holder out of contact with the arcuate strip, means for preventing rotation of the holder and the shaft, said shaft having a threaded end, a support for the shaft through which said threaded end extends, a turnable element threaded on the end of the shaft, the tightening of the turnable element on the shaft causing longitudinal movement thereof to cause the holder and friction plate thereon to clamp the arcuate strip and reverse movement of the turnable element releasing the holder to movement by its spring, and releasing the regulator arm to movement by its spring.

3. In sash operating mechanism including a spring-actuated pivoted arm tending to slide the sash, a friction brake device including a fixed and a movable friction plate, a spring tending to move said movable friction plate in a direction away from the fixed plate said arm having apart connected therewith and movable between the plates as the arm turns on its pivot, and means for moving said movable plate against the tension of the spring to clamp the said partbetween the EDWARD I L. ACKERMAN.

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