US1343410A - Window-lifting apparatus - Google Patents

Description

E. G. SIMPSON, C. l. SCHMIDT AND F. P. CARSTENS.

WINDOW LlFTING APPARATUS.

ArPucAnoN men oc. l. 1919.

gvf////////////ml||||||i'//////////// /f j Patented June 15,1920;

P. CARsTnNs,

EMoHY GLENN sIMPsoN,

or DETROIT, MICHIGAN, or DETROIT, MICHIGAN,

WINDOW-1.1mm@ ArrAHATnsf CHARLES JOHN SCHIIIDT, AND FRANK PHILIP .CARSTENS, ASSIGNORS T0 TEBNSTEDT MANUFACTURING COMPANY, A CORPORATION 0F MICHIGAN.

Application filed October 1, 1919'. No.5327',660.

To all whom it may concern: Be it known that we, SIMPSON, CHARLES J. SCHMnrr, and FRANK residing at Detroit, in the county'of Wayne and State of Michigan, have invented certain new and useful Improvements in Window-Lifting Apparatus, of which the following is a specification.

This invention' relates to stops. It is necessary in mobile body to (provide some form of stop which willvhol position at any point valong its range of travel. rlhis is usually accomplished by. providing a locking device which is disengaged. by the initial turning effort of the crank before the turnin effort of the crank takes eiiect upon the li ing mechanism.

It is the object of the present invention to provide a window lifter stop of quite a different type wherein no lost motion between the crank and lifting mechanism is-required to release the lock.' The deviceoperates simply on, the principle drive. The parts are of such design that practically all ofthem can be madesimply as stampings, which very materially reduces the cost of manufacture.

In the drawings, Figure 1 is an inside elevation of the top parts.- of an crdinary window lifter.

isf'a section on the line 2-2 of Fig. 1. l Fig. 3 is a detail-of the stop or the irreversible driving connection'shown in nonactive position.

" Fig. 4 is a similar view showing how the.

irreversible driving connection locks when turning eiort is' exerted by the tendency of' the window to drop.

Fig. 5 is a similar view showing'how the irreversible driving connection allows the parts to rotate when the turning eiiort is exerted 'through the crank.

Fig. 6 is a section on the line 6--6 of Fig. 3.

Fig. shaft.

Fig. 8 is a lperspetivc detail of the drivindisk.

ig. 9 is an elevatlon 7 is a perspective detail ofthe crank;

EMORY GLENN citizens of the United States,

window lifter connection with.v the ordinary window lifter in a` closed autothe window in its lifted*- Alifting mechanism.

of an irreversible the bottoms of their box 7c, but there is nothing to carrythe'other of the. spring Specication of Letters Patent. Patnted June 15,1920, I

The ordinary chain window-lift comprisesP a chain a running over a sprocket wheel b, which is driven by a large gear that in turn is driven by av small pinion d. It has, heretofore,`ordinarily been the prac-' tice to' provide a lock between this pinion d and. a stationary part of the4 casing e.

little lost motion is provided between the crank and the driving pinion so'that the initial movement of the crank in taking up this lost motion serves by' a cam actionto release the pinion from its locking engagewheel C l ment with the stationary part ofthe casing.

y The present window-litter stop operates on the principle-.of an irreversible ldriving connection between the crank and window The crankshaft is desiatted at one end as at g to' take the crank (not shown). The casing h is on its ront faceperforated as at 'i to receive the'fingers j of the window-lifterstop box k. This serves to clamp the window-lifter-stop box to the casing that houses the driving parts of the window-lift.

ignated f and is This window-liter-stop box is detailed secv tionally in Fig. 6. A Living plate Z ofthe peculiar shape shown in Figs. 3,4 and 5, is roughly of a double hour-glass shape, and is provided with four recesses fm, for the disks When the disks lnl are in repose, as shown in Fig. 3, at the bottom of the recesses m, there is a clearance between the the boxc. However, when an e'ort is made to turn the driving plate l by applying the turning eiort' directly to the plate, the jammed g The outline of the driving plate leading away from the bottom of the recess m is radially a slightly greater distance from the.

Hence l center than lthe bottom. of the recess. when the weight of the vwindow tends to drive the pinion d, this pinionv being in driving connection with the 4driving' plate Vthrough'the pins p,

Fig. 4 occurs. The disks niwhich -areon disks' and condition shown in Fig. 4 results.

the result portrayed in the forward side lof the driving plate l(conl sidering'that side forward which is forwar in the direction of turning) drop back in to recesses andclear the two disks "fn, that lie at the rear of the driv- -ing plate around with the driving plate. The inclined 'surfaces o leadingv out ofthe I recesses 'im' Wedge lin 'under the ball and and the box` because they to engage betweenthe plate. If the turning effort is communicated l thereby -jam them between the box and the driving plate. An effort to move the driving plate through the pinion in the opposite direction results in exactly the same jamming action except that the other two i balls takepart in the jamming instead of those mentioned.

When turning effort is communicated to the plate by the crankshaft a'different action takes plaee.' The crankshaft is provided with a flange or driving keyl g, which engages ina similar hole inthe driving disk r. This driving disk is provided with a pair of struck-down lugs s that are adapted disks n of the driving to the crank, these driving lugs .s drive the drivingplate Z through' the rear disks n, as` shown in Fig. 5. The forward disks are Anever -in danger of jamming in between' the driving plate and the box c. The rear disks cannot jam in between the driving plate are carried along ahead of' the driving lugs s. They consequence is that all the disksv now clear the i box and there is no jamming or locking action whatever. The saine action takes place when the driving is done in the opposite direction. Y V j t-is a spring disk interposed between the driving disk r and the driving plate Z for the purpose of taking up any side play and making the device rattle-proof. u is a counter-balancin spring housedA between the gear c and t e casin at we claim is: 1. In a window lift, the combination of means for lifting a window including av pinion, and an irreversible driving connection therefor which turns freely when actuated to turn the pinion but which locks when the pinion is turned to actuate the driving ber by connection, said irreversible driving connection comprising a cylindrical box, an actuating member connected with the pinion and provided with-recesses, rolling members engaging in said recesses, a second actuating member connected with a crankshaft and which canactuate the first actuating memengaging the said rolling members, said recesses being so formed that anattempt to turn the first actuating member through the gear will vthrust relation with the allows free the rolling reversible driving connection, the parts of said irreversible driving connection thrust-` in g radially outward and jamming when actuation is attempted through the pinion While the parts operate freely with clearance when actuation is through the crank-` .l

shaft. f

3. In a window lift, the combination of,

means for lifting a window including a pinion, a cylindrical box supported adjacent thereto, box, a' disk 9 provided with lugs and which is-coupled up in driving relation with the .70 a crankshaft running through the crankshaft, a driving' plate Z that is coupled with the said pinion'to drive therewith, the said driving plate and driving disk being located in said ybox and the driving plate being provided with recesses, 'and rolling members adapted to engage in said recesses which are arranged to provide cam surfaces to thrust the rolling members into jammed cylindrical box when actuation is from the driving plate but which said rolling members remain ,in their recesses and allow the driving plate to rotate freely when actuation ing disk?.

' 4. In awindow lift, the combination of means for raisin and lowering a window including a rotating member and a crank,

is through the drivand a clutch for holding the window at any its travel, comprising a the parts in radially retracted position and rotation .o raise and vlower the Window. l

,In testimony whereof we al'Hx our signatures.

EMORY GLENN SIMPSON. CHARLES JOHN SCHMIDT. FRANK PHILIP CARSTENS.

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