US1216822A - Locking and releasing device for fire-shutters. - Google Patents

Description

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wllll jE. HfMccLOuD. LOCKING A ND RELEASING DEVICE FOR FIRE SHUTTERS.l Y APPLlcmoN mtu APR. a. |912. y 1,216,822. Patented Feb. 20,1917.

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-of a building.

EDWRD H. MCCLOUD, OF COLUMBUS, OHIO,

fission-on To THE KINNEAR MANUFAC- TURIJTTG COMPANY, 0F COLUMBUS, 011110,v AACORPORATEON 0F WEST VIRGINIA.

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Specification of Letters Patent.

Patented Feb. ao, 1ere.

Application med April e, 1912. i serial No. 688,163.

provide improved means for facilitating the testing of a normally thermally controlled rolling -ire shutter so that itV can be manually released and rccoiled from the interior The invention is embodied in the example herein shown and described, the features of novelty being pointed out in the claim. j

In the accompanying drawing forming part hereof-- Figure 1 is a view in end elevation showing the devices in position for locking the shaft of theshutter roller.

Fig. 2 is a similar view showing the devices in roller releasing position.

Fig. 3 is a detail in elevation showing the handle at the interior of the building controlling the locking and releasing devices at the exterior of the building.

Fig. 4 is a front view of that end of the rolling shutter containing my invention.

The invention is more especially adapted for use in connection with what are called normally unbalanced coiling shutters, that is the species in which the flexibleA shutter is normally held coiled up and is liberated au'-v tomatically by a dangerous rise of temperature forl uncoiling mainly by gravity in the event of iire. t will be understood by those skilled in the art that-6 represents one of a pair of end brackets to support such a shutter and that 5 is the end of a roller shaft supported between such a pair ofbrackets. 7 represents a wall to the outer side of which the brackets are secured. The shaft 7 has secured to it a spur or ratchet wheel 8. Fulcrumed on apin 9 projecting from the side of the bracket is a lever 10 which extends under the wheel. Pivoted on the lever nea-r its middle is a pawl 11 havingits lower end weighted so as to cause its tooth-end to normally point toward the wheel 8. On the free end of the lever 10 is a small anti-friction l roller 12. Pivoted on a short stud 13 on the bracket above the free end of the lever 10 end of the in `the lever 14.

. opening for the handle 16B-16a.

is asecond lever 14 having a bearing edge 14.a for-the anti-friction roller 12, and an edge 14? that contacts with the lower edge of the lever 10 and, in conjunction with a curved socket 14C, limits the upward movement of the two levers when the lever 14 is caused to actuate the lever 10. The ldwer i pawl 11 oscillates in a socket 141 The lever'14 has connected to its free end a chain 15 containing a fusible link 15FL said chain being extended into hole 7 a in the wall 7 of the building toward the interior thereof and said chain having attached to its inner or free end a handle .composed of -two parts 16 and -16a jointed together by a hinge joint `at 17. `Secured by bolts 19a on the inner` side ofthe wall 7 at the inner end of the hole 7 a is a plate or escutcheon 18 having an Said plate has on its inner side a thimble 18a extending into the hole 7a. p late`18 at its opening is a curved guard flange 18h and below said flange ahook 19 in vertical line with said opening. rIhe hook Y is open at one side and the iange 18 at the corresponding side is inclined away so that the handle after flexiondownward can be swung in a vertical plane into and out of the hook as seen by full and broken lines Fig. 3. When the handle hangs vertically and is within the hook 19 it and the chain as well as the devices at the exterior (except the pawl and roller) are locked from movement. To release the devices at the exterior the handle is first swung to the broken line position Fig. 3 and then raised to horizon- On the outer side ofthe tally aline with the hole in the wall whenv the weight of the levers 10 and 14 will cause the said levers tofall away to the position shown in Fig. 2. The cha-in 15 is, of course, made of such length that when the pawl l11 is drawnup to ratchet-engaging position, or as shown in Fig. 1,V the handle part 16 can be turned down into the hook on the plate as seen 1n Figs. 1 and 3.' 'The line 20 desigholds the shutter from un- Y to prevent the handle from passing too far Vand oscillating the pawl.

into the hole 7 a when the shutter is released. To restore the shutter to coiled up condition the parts are replaced to the position shown in Fig. l by drawing out the handle part 1G and securing it as before stated, and as shown in full lines Figs. l and 3. The bear-"11 ing edge 14a when pulled inward on the anti-friction roller lOL causes the lever 10 to rise. After this operation the shutter is pushed up, the ratchet wheel slipping over The shutter can be pushed up from the interior of the building, iirst by raising the lower sash of the window and nally by lowering the two sashes and completing the coiling of the shutter by working it through the opening provided by lowering the two sashes.

lt will be observed that this invention makes it especially convenient to test the shutter fromtime to time as this can be done from the interior of the building and Without the necessity of employing ladders to reach high places. Y

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

What I claim is:

A locking and releasing means for a ire shutter roller provided with a ratchet, comprising in combination, a'lever pivoted near the ratchet, a gravity pawl pivoted on said lever to normally engage said ratchet to permit rotation of the ratchet in one direction and prevent rotation in the other direction, a second lever pivoted to swing under the irst mentioned lever, the end of said first mentioned lever adapted to normally rest at its end upon the second mentioned lever near the pivot oi' the latter, a device connected with the second mentioned lever to actuate the same to raise and lower the first mentioned lever to engage and disengage the pawl from the ratchet, and means whereby said second mentioned lever may be held in raised position to hold the pa'wl normally engaged with the ratchet, substantially as t described.

EDWARD H.`MGCLOUD.

Witnesses: ALBERT RUSH,

ANNA TERESA KING.

Copies of this patent may be obtained for ve cents eaclnby addressing the Commissioner ofY Patents, Washington, D. C.

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