US1267299A - Stop for furnace-doors. - Google Patents

Description

L. 0, WEST. STOP-FOR FURNACE DOORS. APPLICATION HLED lUNE 29. 19W- Patent-ed May 21, 918.

LEONIDAS D. WEST, OF DENVER, COLORADO.

STOP r03 romance-nouns.

Specification of Letters Patent.

Patented May 231, 1918.

Application filed June 29, 1917. Serial No. 177,823.

To allwiwm it may concern:

Be it known that I, LEoNIDAs D. lVnsr, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Stops for F urnace- Doors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its principal object to provide a stop to prevent entire closing of-furnace doors, after coaling, means being provided whereby the stop is automatically set by opening of the door, thus insuring that the fireman shall not neglect leaving the door open a suitable length of time to admit sufficient air to prevent smoking.

A further object is to mount the stop on a damper which is opened upon opening of the coaling door, whereby a single operating means may be provided for both parts.

A still further object is to so construct the device so as to render it easy to manufacture and thus marketable at small cost.

With the foregoing general objects in view, the invention resides in the novel features of construction and unique combination of parts to be hereinafter fully described and claimed, the descriptive matter being supplemented by the accompanying drawing which constitutes a part of this specification and in which:

Figure 1 is an elevation of a furnace door showing the application of the invention.

Fig. 2 is an edge view of the parts illustrated in Fig. 1, showing the normal positions thereof.

Fig. 3 is a vertical section showin the relative positions of parts after the oor has been closed to the predetermined extent after coaling and Fig. 4 is a horizontal section on the line H of Fig. 3.

In the drawing above briefly described the numeral 1 designates a common type of furnace coaling door which is hingedly mounted in the usual manner, the inner side of said door being provided with a perforated buffer 2, the space 3 between said buffer and the door constituting an air heating chamber into which an air inlet neck 4: discharges, said neck being mounted on the door and having at its outer end a pivoted damper 5 which is formed with a plurality of perforations 5 which serve to admit a small quantity of air at all times.

Depending from the damper 5, is a link 6 whose lower end is connected with a combined operating member and latch 7 pivotally mounted on the door 1, a pivoted handle 8 being provided immediately below said combined operating member and latch for opening the door and at the same time for actuating said member to open the damper 5. The handle 8 in the present showing, is provided with a .cam 9 which cooperates with the member 7 for not only operating said member to open the damper 5, but for holding said member so as to retain the damper in open position until released. It is thus insured that whenever the door is opened for supplying coal to the fire box, the fireman cannot neglect to open the damper 5, and thus when the door is again closed a quantity of air will be admitted through the neck 4 to assist in'burning the volatile materials before they escape in the form of smoke.

In most cases it is necessary to admit more air than that passing through the neck 4 and for this purpose, I provide a stop 10 which limits the closing movement of the door "to permit additional air to enter the fire box around the same. The stop 10 is carried on the same pivot as, and moves bodily with the damper 5, the stop being thus set as shown in Fig. 3 when the handle 8 is operated for opening the door. It will thus be obvious that when the fireman closes the door, after coaling, the closing movement will be limited by the stop 10 until this stop is moved to inoperative position at the end of a predetermined time by releasing the member 7. When this is done, the damper 5 drops by gravity to cut off the inrush of air through the neck 4, and simultaneously the stop 10 is retracted.

In order that the stop may be properly set for holding the door open the required amount for producing best results, said stop is preferably adjustable being held in any, adjusted position by a' set screw or the like 11.

From the foregoing, taken in connection with the accompanying drawing, it will be obvious that although the device is of comparatively simple and inexpensive construction it will be highly efficient for the purposes intended. Since probably the best results .are obtained. from ethe specifi Q struction shown and described, such construction constitutes the preferred form of the device. I wish it understood, however, that within the scope of the invention as claimed numerous minor changes may well be ,made without sacrificing the principal advantages.

I claim:

1. The combination with a furnace door, of a movable handle for opening said door, a stop for arresting the'closin'g movement of-said door without manual-attentionwhen the" door-nears its: closed position, and -connectingmeans between said handleandstop for moving the :latterto operativeposition when the-"former is operated to open the doorand forholding said stop-in said'operative position until released.

-2. The combination'wit-h a furnace door, of an aininlet neck therefor, a pivoted damper for said neck, a movable-handle for said door, connecting--means betweensaid handle and damperfor-openingsaid damper when said handl is .eperate t 0129 the door, said connecting means having means for holding the damper open until released, and a door stop carried by said damper to prevent entire closing of the door while said damper remains in open position.

3. The combination with a furnacedoor, and a stop mounted pivotally on said door for preventing entire closing thereof after coaling, a stop-actuating member pivoted to said door, a link pivotedgto saidsstop. and said member for disposing the former .tooperative position when said member is.-operated, ai-handle pivoted to thedoor and having a cam .for operating said member, and acam-latching shoulder onsaid member foren-gagement with the send. of said camwhen the latter has performed its Work, to preventtreturn of the partsto ,no-rmal positions untilsaid cam .and shoulder are manually disengaged.

In testimony whereof I: have hereunto .set

my hand.

LEONIDAS D.

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Washington, D. 0.

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