US1667081A - Metallic rolling shutter - Google Patents

Description

J. C. RAPER METALLIC ROLLING SHUTTER Filed Nov. 4, 1926 2 Sheets-Sheet l INVENTORI April 24, 1928.

April 24, 1928. 1,667,081

' J. C. RAPER METALLIC ROLLING SHUTTER Filed Nov. 4. 1926 2 Sheets-Sheet 2 Patented Apr. 24, 1928.

"' 'f'JosEPH cf intuit on CQVINGTON, KENTUCKY.

METALLIC ROLLING SHUTTER.-

Application filed November 4,. 1926. :SeriaI No. 146,271. v

This invention relates to metallic rolling shutters, and, more particularly, to the release or trip devices used in connection-with metallic, self-winding and-spring-controlled,

rolling firedoors or shutters for buildings,

whereby any undue increase in temperature in the building to a fire-danger stage serves to dissolve or actuate thermostatic-inserts that normally hold together the vreleaseniechanism that comes into action and 0p erates automatically when ithe said thermostatic-inserts become actuated and the weight of the said the doors or shutters causes'them to theninstantly drop into closing-position in the doorway or other opening they are provided to protect. V I The so-called Kicker. release or trip device herein is oneof very material simplicity and accuracy or certainty in structure and action, and its details will be fully hereinafter described in connection with the accompanying several sheets of drawings, in ;which I 1 1 Figure l is a horizontal axial-section of the self-winding roller and: automatic-release devices showing the spring-roller broken off and with-:myYi-nvention herein in its-normal state ready for emergency action';- Fig. 2, aninside elevation of my release device, along the parting of the sectional casing or shell thereof, the inner 'mountingend of the trip weight carrier arm being shown 1n section on'the outer end of- 1 the transverse release-shaft; Fig. 3, a sectional elevation of my improved automaticrelease device, taken-on the dotted line 3, .3,

' of'Fig. Zand including a broken-off portioncarrier arm; of the-afore-- of the aforesald trip weight, "Fig; 45, alongitudinalelevation said trip weight-carrier arm, show ng its mounting-shaft in cross section and with, a

short length of the ch'a in of the release def vic'es used. in supportingv the said weight arm, awaitingany undue-heat actuat ng a ing or parting the. latter for .the instant;

/ position; Fig. 5,

thermostatic insert in said chain and sever- Y dropping of-theweighuarmand the accomp'anying0'r consequent release of the springlroller for the simultaneous.

to be mounted for use; Fig. "6, "aleft-hand end View of Fig. '55 Fig. 7, a'rearedge elevation of the gravitatmg pawl dropping of the; fire door or shutter into closing protective l H a longitudinal elevation of the. tripcarrier sleeveon whose'outerend the said weight-arm is ponent part ofmy improved automatic-release device herein;fFig. 8, a side elevation of the said PtlWlgSBBIllIl Fig. 7; Fig. 9, a fore-edge View of said pawl; and Fig 10, .fragmentary longitudinal section of the ends of the duly connected slatted members of the fire-door,the latter not being deemed necessary to display herein. In this View (Fig. 1) I alsoshow 'an-improvedor quite universal form of self-Winding and springcontrolled roHer-mechanism-,Q that has at its left-hand end a hubbed coupler-disk. ,D

vada tedv for cosenga'gement jwith a like 'hub ed; coupler-disk E by-mea'ns ofthe conmeeting-bolts F. -A, two-part shaft Gextends outwardly from the left end of the said roller, beyond the coupler-diskE, and pins a and b are respectively used in the hubs of the disks D. and E for fastening them on the said shaft Grand thus uniting the two parts of the latter in: proper aligned relation. I y

H'indicates, taken'as'a whole, acasingfor housing that has a hub-member 11 bushed at 12 on the outer member or section of the said shaft G and incontactwwith the outer end of the hub h on the diskiEn j A bevel gear- 13 is -mounted .onthe said outer member of said twopart shaft G with.- in the expanded chamber-portion '14 of the hub-member 11, andthe extreme outer end extends rearwardly vto form a casing or chamber J for accommodating an auxiliary,

horizontal, lateralshaft lti on whose outer 1 end is mounted a bevelpinion17 that .is of lesser diameter than that of the said companion gear. 13 with which it, meshes'for fuse in winding the springroller and controlling the same. I The said pinion 17 has a hub '17 and apinl'Z for 'securingit on the sjaijdauxi 'liary shaft 16.. 1

Orificed lugs or ear-sac, '0, are provided on the plate I fortherecefption of the bolts or screws (not shown) used in fastening the so-called Kicker, devices herein on the roller-shutter box or casing for instant emer gency use in the event of'threatene'd dangerous fire in .the' premises where the shutter is located; 7 J

ing the friction and unnecessary thickness of the said auxiliary shaft in the surrounding sleeve and, otherwise, further providing for the free and easy, independent rocking movement of the sleeve that carries at its inner end a so-called Kicker arm 24, the latter having a lateral striking or thrusting crank arm or lug 25, as best seen in Figs. 2, 3 and 5.

The extreme end 26 of said outer end of the shaft 16 issquare in cross-section for the convenient use of a hand-crank in turning the shaft forward when winding the springroller through the medium of the gears 13 and 17.

The outer end of the sleeve 20 is flatfaced at 27 and adjacently shouldered at 27 for the rigid stop reception of the single square Walled orifice 28 at the innerend of the arm 29 that carries a weight 30 on its upper edge, as best seen in Figs. 2, 3 and 4.

A section of chain 31, ordinarily used in the automatic-release devices of tire-shutters, is shown in Fig. 4 at the outer end'of the said weight-arm 29. A washer 32 and cotter'pin 33 are used in the said outer end of I the shaft 16 to hold the weight-arm 29 in removable place thereon, as best seen in Figs. 1 and 2.

A ratchet-wheel 34 that has a hub 35 is mounted on the auxiliary shaft 16 and secured in place by means of a pin36, as best seen in Figs. 2 and'3, with one face in contact with the inner Kicker end of the sleeve 20 and with the end of the hub 35 in contact with the slightly projecting end of the bushing in the partition 19 of the chamber J to reduce friction as much as possible and still avoid undue looseness or play on the ratchet part of the auxiliary shaft 16,

and, also, to maintain or preserve the proper alignment of the said ratchet for accurate and dependable duty in connection with a swinging pawl 37 whose mounting-hub 38 has a free gravitating bearing on the pin 39, the latter being in the nature of a short shaft that has a threaded inner end 40 for removable-mounting in the said partition 19 and the outer wall 41, and the outer end of such short shaft or screw-pin 39 protruding slightly beyond said wall 21 for ready insertion of a screw-driver in a crossslot (dotted at 42 in Fig. 2) when the pin 39 is to be inserted or removed. A spacertubing 43 is provided on the screw-pin 39 for preventing endwise-play of the swinging-pawl hub 38 and to thereby preserve or maintainthe proper alignment of the said pawl 38 in due operative relation to the ratchet 34 and the crank-arm 25 of the said Kicker arm 24, all as best seen in Fig. 2. The pawl 38 has a shoulder 44 in its inner edge for the successive engagement of the teeth of the ratchet 34,and the lower flat end 45 of the said pawl is of ample area to receive any and all of the thrusts'of the tapered end 46 of the crank-arm 25 of the socalled Kicker 24when the release devices are brought. into action by the automatic severing of the thermostatic chain element 31, occasioned by undue heat conditions. The outer edge of the pawl'38 is convexrounded and thus well adapted to impinge or strike againstthe short rib or lug 47 that projects from the inner face of the.

-wall I of chamber J and thereby forms a back-stop to limit. the rearward movement or play of the said pawl away from the zoning edge of the circular path of the teeth of the ratchet 34 when the Kicker has It will be observed that the pawl 38 is in A normal active engagement with the ratchet 34 when the shutter is in Wound condition on the spring-roller and that when the chain 31 has become severed or parted, by the automatic thermostatic action of undue heat, on its fusible link or links, the gravitating heft of the rocker weight-arm 29, at'the outer end of the rock-sleeve 20, instantly. and simultaneously causes the so-called Kicker at the inner end of the rock-sleeve 20 to advance toward the lower flat end 45 of the pawl 38 and strike with a sharp and decisive blow or thrust, whereby the pawl is simultaneously released from holding or detaining engagement with the ratchet 34 and the consequent simultaneous automatic-release of the auxiliary shaft 16 whose pinion 17 engaged with the gear 13 has normally held the spring roller and the shutter in regularduly wound condition preparatory to said undue heat controlling and abnormal conditions necessitating the dropping of the roller-shutter in the opening itis designed to close and protect against damaging fire position under the heft of the chain-renaled, a transverseauxiliary shaft having miter gear connection with said roller shaft in said receptacle, a ratchet wheel mounted to turn with said auxiliary shaft, in said receptacle, a rock sleeve concentrically mounted on the said auxiliary shaft and extending beyond the said receptacle, a strikearm at the inner end of said rock sleeve and vertically below the said ratchet wheel, a swinging or gravitating pawl mounted on a shaft that lies parallel to said auxiliary shaft in the receptacle and with said pawl sus- Jended in ali nment with said strike-arm a. l 7

weighted arm extending from the outer end of said rock-sleeve and adapted to more posi tively or effectively hold a notched or shouldered part of said pawl in'engagement with the respective teeth of said ratchet-wheel as well as to impart striking-heft adapted to cause said strike-arm to impart a quick and decisive blow to said pawl when the release mechanism herein has been brought into action, and a thermostatic frangible chain ex- 7 tending from the outer end of said weighted arm to a roller door or shutter mounting for automatic parting action when dangerous fire heat conditions occur in the openin that is to be closed and protected by said door, substantially as shown and described.

2. In a device of the character described, the combination with a spring-wound shutter-roller having a longitudinally aligned and extended shaft of two disk-connected members, a release-mechanism box or recep- 1 tacle .in which the said shaft is journaled, a transverse auxiliary shaft having miter-gear connection with the said roller-shaft in said receptacle, a ratchet-wheel rigidly mounted on said auxiliary shaft and to turn there with, a rock-sleeve of larger diameter than said auxiliary shaft on which it is concentrically mounted with bush-bearings inter vening and extending outwardly at one end beyond the said receptacle, an arm extending downwardly from the inner end of said rock-sleeve and adjacent the said ratchet-wheel and having a lateral strike arm at its lower end thatprojects in a line beneath the said ratchet-wheel, a gravitating pawl mounted to freely swing on ashort shaft located insaid receptacle and parallel to said sleeve and auxiliary shaft and with the said pawl suspended in rear alignment with the said lateral strike arm, a shoulder or notch in the edge of said pawl facin the ratchet-wheel with which the teeth 0 the latter may successively engage, a weighted arm extending from the outer e-nd of said rock-sleeve, a stop-lug on the inner face of the receptacle for limiting the rear movement ofthc said pawl, and a frangible thermostatic-controlled chain adapted to connect the outer end of said weighted arm with aroller-shuttermounting device in the 0 ening or doorway to be protected by the s utter in tire emergency, substantially as shown and described. i

In testimony whereof I have hereunto affixed my signature. I

JOSEPH o. RAPER.

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