US1652322A - Air-regulating fire shield - Google Patents

Description

Decf13, 1927. 1,652,322 R. s. PECK AIR REGULATING FIRE SHIELD Filed June 2 1927 I N V EN TOR. R. .5. Pea/r.

w)/ E v A TTORNE Y.

Patented Dec, 13,1927.

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plication to' the see box-' doorway ofi adore; .motifve boiler furnace and'is an improvement of the sub'je'ct matter discliised in my co pendi ngiapplieation,

An object of the present inventionis:

"te proyide ian-improvedtype "a shield -capab'l of being utili zed to regulate -the quan f may of a-ir 'permitted' to pass =th rough the' upper portionof the doorway while the shield is'i11 'operativezpositifonz i V Otherpurposes-, 'advantages and' char-216 teristiie fatures -0'f the *invention will he 11mm readi l'yj"unde1'stood' 3 from the following detailed 'deseripti on' and aeeompanyingmlraa seamc I Figure l'is a fra'gm'entary front'elevational View of a fire box "equi ppecl with the im-' proved-shield p V Fi ure' 2 is aniedge view of {the .shield as it wili appear w-h en adj usted' i to --admit a relatively small volume of air through the operative position to give access to sub stantially the total area of the doorway;

Proceedinglnow to a more detailed discussion of the drawings 11 designates a shield normally overlying the upper portion ofthe fire box doorway 12 and hinged at 18 to a supporting strip 14. This strip is suspended by a bracket 15 from the door guide16 of the furnace structure. 1

As indicated by dotted lines 1n Figure 1," shield 11 is apertured toprovide a plurality of air passages 17 normally closed by a flap 18. This flap is hinged, at 19, to the, strip 14' and tends to lie flat against the outer surface of the shield. The central upper edge portion of the flap is slot-ted at 20 to permit the flap to be swung upwardly without interference by the bracket 16. An adjusting screw 21 is threaded through the flap 18 to bear against the outer surface of the shield 11 so that by turning this screw the flap may be adjusted to or-from the shield to thereby control the quantity of air ad- -mittedbetween the shield and flap for de- 1927; Serial Na -mm.-

livery 'to the-fire boxthrough the passages- 17. VV h'enit is'de'sired to passa large-volume' of air into thefl fire boxt-hrouglr the passages 17" the flap 18- is swung upwardly and' secured in the position shown in Figure an eye 23 carried by the slide bar 15. 7

inoperative position togive free access *to the: upper portion ofthe fire-box for repair or otl ierpurposes 1t lSSGCHlGd to the flap by means of the hook 2icarried b'ythe flap and engage'ablein the-eye "25 oftheshield-= and thefshield' and flap are then both swung upwardly to the position'r showir in Figure at and retained: in such position by-engagement of 'the hook 22with tlie:eye 23;f

Theshield-ll and flap 18 are normally suspended as shown in Figure: 1 I with 1 the flap I lying against the outer surface of the shield and closing the air passages 1?.

no airadmitted: i into the' fire' box through the upper portion of "the door-way i 12. 2 When the flap is swung outwardly by the operation In this position: of; the parts there is little or. I

of" screw- 21 the air admitted beneath 'the vflap for delivery into the fire box through the passages 17 is caused to be distributed evenly-over the bed of the firebythe arrangement of said passages. By regulating, through the medium'of screw 21, the clearance provided l'ietweenxthe flap 18 and the underlying shield'll the quantity of air delivered through the passages 17 may be regulated between. minimum and maximum limlts so as to insure, efficient combustion for varying conditions of engine operation;

When the maximum quantity of air is to be delivered into thefire box through the passages 17'the .fiap 18 isisecured in the position shown in Figure explained.

iBesides controlling admitted into the fire box through the upper portion of the doorway 12 it will be understood that the shield structure herein disclosed serves to protect the fireman from the intenseheat within the fire box without interfering with the delivery of fuel into the fire box through the lowerportion of the doorway '12. As shown to advantage in Figure 1 the shield 11 is spaced a sufficient distance from the furnace structure to permit the doors 26 of the fire box to operate therebetw'een and the "doorway 12. It is thus apparent that the shield structure is the quantity of air lit] the invention it will be understood that vari ous changes in the construction, arrangement and combination of parts may be resorted to within the scope and spirit of the invention as defined by the appended claims.

\Vhat I claim is: 1. A shield of the character described provided with air passages and means for controlling the quantity of air delivered therethrough. i

A shield of the character described comprising an apertured plate and an aperture closing flap hingedly connected thereto. 3. A shield of the character described comprising a member adapted to be secured at the upper edge of a furnace doorway, an apertured plate hinged to said member to overlie the upper portion of the doorway and means for controlling admission of air through the apertured portion of the plate. i. A shield of the character described comprising an apertured plate adapted to overlie the upper portion of a furnace doorway, a flap normally closing the apertured portion of the plate and means for adjusting the flap to regulate admission of air through the said apertured portion of the plate.

5. A shield of the character described comprising an apertured plate provided with means for hingedly suspending the same from a furnace structure to overlie the upper portion of the fire box doorway, a flap hingedly connectedto the shield and normally serving to close the apertured portion of the platejmeans for adjusting the flap relatively to the plate to regulate the quan tity of air admitted into the fire box through the apertured portion of the plate; and

means for securing said flap in raised position to freely expose the apertured portion of the plate when a maximum amount of air is to be admitted through said apertured portion of the plate for delivery to the fire box. a, a a,

6. A shield of the character described LBOD'IIJI'lSlIlg a plate having apertures formed therein, a strip hingedly connected to one edge of said plate, a flap hingedly connected to said strip and adapted to normally lie.

against one face of the plate and to close the aperturestherein, means, for securing said strip to a furnace structure to dispose the apertured plate over the upper portion of the [ire box doorway, means for detachably securing the apertured plate to the said flap and means carried by the fiap and enga eahle with complementary meanscarried y the furnace to secure the flap in an upwardly swung position with reference to the fire box doorway. i i

In testimony whereof I hereunto afiix my signature.

RAYMOND s'rARNER PEO K.

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