US1718752A - Shutter-operating device - Google Patents

Description

Juhe 1929. MCCLOUD I 1.718.752

SHUTTER OPERAT ING DEVI CE Filed. Nov. 23, 1927 v mentor EDWAR D H. MC LOUD attorneys Patented June 25, 1929.

UNITED STATES PATENT OFFICE.-

EDWARD H. MGCLOUD, OF COLUMBUS, OHIO, ASSIGNOR TO THE KINNEAR MANUFAC- TURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

SHUTTER-OPERATING DEVICE.

Application filed. November 23, 1927. Serial No. 235,1?6'.

The invention relates to rolling fire resisting doors or shutters that are provided with means for raising and lowering them and are adapted to be released for automatic clos ing in the event fire; and the object of the invention is to provide improved means for relieving the shutter or door of the work of operating the gear tram of the holstmg means when the door or. shutter is automatically released for closing as aforesaid. Other objects of the invention will appear from the disclosure herein.

The invention is embodied in the example herein shown and described, the features of novelty being finally claimed.

In the accompanying drawing- Figure 1 is a view in elevation of the end bracket of a rolling shutter or door with my invention applied thereto, the gear train of the operating mechanism being in closed position.

Fig. 2 is a front elevational view of the same.

Fig. 3 is a view like Fig. 2 showing the gear train operating mechanism broken.

Fig. 4; is a diagrammatic view showing the gear train of the operating mechanism closed or engaged or in the position in which they are in Figs. 1 and 2.

Fig. 5 is a similar view showing the gear train broken or disengaged.

In the views 10 designates any ordinary drum or barrel shaft of a flexible rolling door, curtain or shutter (not shown) said shaft having at its end a large spur gear 11. The shaft 10 and its gear 11 are journaled in an. end bracket 12 secured as usual to the building just above the door or window opening that is to be closed (or opened) by the door or shutter. J ournaled on the end bracket and engaging the large gear 11 is a small spur gear 13. Pivoted at 1 1 on the bracket is a lever" 15, of the second class, carrying journaled therein a small spur gear 16 adapted by the movement of said lever to be brought into and removed from mesh with the small gear 13. Journaled in the bracket is a shaft 17 having secured to its inner end a small spur gear 18 not engaged with the large gear 11 but located to be engaged by the small gear 16 when that gear is raised to mesh that gear with the gear 13. It is, therefore, clear that if the gear 18 be turned its motion will be communicated to the large gear 11 through the gears 16 and 13. It will also be obvious that, if the lever 15 be lowered to remove the gear 16 from the gears 13 and 18, the gear 13 only will be turned when the large gear 11 is turned, as for eXa1nple, when the curtain shaft is turned by the dooror shutter unrolling therefrom. It follows that less Work will be required to turn the gear 13 than would be required to turn the whole train; and that the curtain will descend with greater ease, certainty and with less noise than if it turns said train.

On the other end of the shaft 17 and secured to it is a sprocket wheel 19 carrying an endless chain 20 (the upper loop only of which is shown) that extends sufliciently near the ground to permit its operation by a workman, usual. When the gear train is closed the operation of said chain 20 rotates the gear 18-and the gear train including the large gear 11 and therefore raises or lowers the door or shutter according to the direction of motion imparted to the gear 18.

Pivoted in ears on the end bracket 12 is an arm 21 that can be swung upward under the free end of lever 15 when the latter is raised to establish the gear train and support the same in such position. The arm 21 is held to support lever 15 in gear train establishing positlon by means of a wire 22 attached to a suitable fixed point (not shown) above, said wire containing a link 23 fusible upon a dangerous rise of temperature, such as caused by a nearby fire, so that when said link is fused the arm 21 and lever 15 drop by gravity and therefore disestablish the gear train as depicted in Figs. 3 and 5.

An. important advantage of the invention is that thedisestablishing of the gear train does not involve a dropping of the primary driving means, towit: in the present instance the sprocket wheel 19 and the operating chain 20.

The forms of the parts can be changed without departing from the gist of the invention as claimed.

What I claim is:

1. Means for driving a door or shutter winding member having a gear thereon, said. means including a gear engaged therewith, a driving gear disengaged with. either of said last named gears and an intermediate gear intermediate gear,

I 3. Means for means including a gear directly engaged I o D a either of said gears, an intermedlate removable gear adapted to form with the other therewith, a driving ear disengaged with gears an operating train,'means carrying said and thermally controlled means for supporting said'carrying means in gear train establishing position.

driving a door or shutter winding member having a gear thereon,

' said means including a gear for operating engagement with the gear of the Winding member, a driving gear, and a removable gear adapted to be moved Into engagement with both said last named gears to form an operating train with the other gears.

4. Means for driving a door or shutter Winding member having a gear thereon, said means including a gear for engagement with said winding member gear, a driving gear disengaged from the gear of the winding member, an intmmediate removable. gear adapted to form an operating train with the other gears, removable means carrying said intermediate gear, and thermally controlled means for supporting said carrying means in gear train establishing position.

EDWARD H. MCCLOUD.

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