US372017A - Chimney-cap - Google Patents

Description

(1410 Model.)

T. W. EMERY 8v W. SPENCE.

GHIMNEY GAP.

No. 372,017. Patented Oct. 25, 1887.

. a m L QMWOQQO n kum bv ISI UNITED STATESv PATENT Trient.

THOMAS WILLIAM EMERY AND WILLIAM SPENOE, OF MINNEAPOLIS, MINNESOTA.

CHIMNEY-GAP.

SPECTPICATION forming part of Letters Patent No. 372,017, dated oeteeez 25,1887.

Application filed March 15, 1886. Serial No. 195,232. (No model.)

T0 all whom it may concern:

Be it known that we, THOMAS WILLIAM VEMnRY and WILLIAM SPENcE, citizens of the United States, residing in Minneapolis, in the county of Hennepin and State of Minnesota, have invented an Improved Ventilating and Draft-Accelerating Cap for Chimneys, VentilatingShafts, and other Uses; and we do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, making part of this specification.

Figure l of the drawings represents a side View of the cap as applied to the top of a chimney; Fig. 2, a top view ofthe same; Fig. 3, a horizontal section looking downward in a plane indicated bythe line l l, Fig. l; Fig. 4, a cen-A the respective Afaces of this upper band are tral vertical section thereof.

Like letters designate corresponding parts in all of the iigures. .f v -f The forin'of the base of this cap, as shown iu the drawings,is rectangular, and this is the form adapted to most chimneys; but a round or some other form maybe best adapted to some other places, and the invention is equally well adapted to such other forms.

The entire body of the cap is easily, cheaply,

i and preferably made of a simple piece of sheet metal cut in blank to the proper form and then bent into the required shape, and the meeting edges of the sheet metal soldered or otherwise joined, preferably at one vertical corner.

, The base A of the cap forms a band, which in the present case ts around the entire top of the chimney B, and is secured there by a simple frictional pressure, orwith .the assist; ance of bolts or other means of attachment. Just above the top of the chimney, or at the upper edge of the band on each side, a section, O, is cut from the sheet metal, separated therefrom at three edges, all except where it is connected with the band A below, and these sec- .tions are narrowed from bottom' to top, as

united by solder or otherwise to give strength and stability to the form. The aperture at the upper edge of the frustum is equal to or suflicient for the size of the fiue or flues of the chimney below.

The sections eut away to form the frustumcase, as above set forth, leave the corners of the cap connected with the base-band below, and these corners compose the standards D D, which support the upper parts of the cap. If the cap is round, then, instead of there being corner standards, there are simply integral portions of the sheet metal alternating between the frustum sections to `form the standards. To the'upper ends of these standardsis joined an upper band, E, extending around the cap,and at the upper edges of outwardly turned and obliquely situated anges or wings G G, of curved or any other ornamental form, as shown, or otherwise. This upper band serves to stop the progress of the wind or airburrent which strikes the cap, eX- cept what passes through the openings formed by cu'tting'out the frustum-sections, and all ythe air that impinges upon the inclined surfaces of the frustum within is thereby directed upward and out through the open top of the cap, thereby producing or greatly increasing an upward draft from the chimney-fines or Ventilating-shaft under and within the cap by the fricticnal contact of the two joined currents of air. The outwardly-inclined wings G G direct downward and through the side openings in the cap additional portions of the air-current, and on the lee side they assist in directing the draft upward and outward.

In connection lwith this cap and main ventilator we add a shield-cap, H, which is placed in the open top of the main cap, and is held directly'ove'r the opening in the top of the frustum, and covers the same, being ofproper form to fulfill this purpose.l The upper surface, a, is convex, or has inclined sides, the form for a cap of the shape shown in the drawings being that of a broad low pyramid. This form serves to shed the rain and snow and to direct the same outward, so as not to fall inside of the main cap. The under surface, b,

of the shield-cap is also convex, and may be IOO of the same shape as the upper surface and lowest in the center. Having this form, it not only does not impede the upper discharge of the commingled air and draft currents, but assists in directing them upward and outward, and by contracting the space over the frustum of the cap increases the force of the draft from the chimney or ventilator. This shield-cap is held in place by narrow metallic strips or rods c c, which are secured to the upper band, E, or its wings G G, as shown in the drawings, or may be attached to thesides of the frustu m. By using bolts and nuts d d for the attachment, or other equivalent means, the shield-cap may be readily removed for cleaning chimney-dues without removing the whole cap to gain entrance to the iiues.

In addition to the shield cap, as above set forth, we in some cast-s, where sparks are to be kept from escaping from flues below, place wire-gauze screens I I over the spaces between the shield-cap and the frnstunl or contracted cone beneath it, as shown in Fi g. 1.

It is to be understood that this Ventilating and draft-producing cap is applicable to many uses, as for chimneys, smoke-stacks, ventilators of all kinds, as for houses, cars, steamboats, sailing-vessels, vaults, basements, &c.

In case two or more chimney or ventilator tlues open into the same ease or frustuln, as shown atff in Figs. 3 and 4, in order that the draft in either flue may not overpower that in the other or others, and to equalize the same, we place a partition or partitions, K, between the ues, inside of the frustum, reaching from the top of the chimney or ventilator to the top of the frustum or thereabout, and in order to secure the best ecct, and even to increase the draft of each flue, this portion is preferably inclined correspondingly to the opposite sides of the frustum, as shown in Fig. 4; and to still further render the action on the draft of one flue independent of that of the other, we preferably place wing-partitions L L outside of the frustum, opposite to the partition K within, as shown in Figs. land 4.

We are aware that a chimney-cap contracted in size from the top of the chimney upward, having a larger band or case around its upper end extending downward considerably below the upper edge of the said cap, and a shieldcap over the said cap, with an open space between the caps, is not new.

\Ve claim as our invention'- 1. A Ventilating or draft-producing cap constructed with upwardly-contracted case, side openings opposite to the same, band above the openings supported by standards between the openings, and outwardlyturned wings at the upper edge of the top band, substantially as and for the purpose herein specified.

2. The combination of a chimney or ventilator having two or more flues, cap over the chimney formed with upwardly contracted ease or frustum, shieldcap over the open mouth of the same, and partition or partitions within the frnstuin between the fines, substantially as and for the purpose herein specified.

3. The combination of a chimney or ventilator having two or more fines, cap over the chimney or ventilator formed with an upwardly-contracted case or frustum, shield-cap over the open mouth of the same, partition or partitions within the frustum between the filles, and wing-partitions outside of the frustum and opposite to the interior partition or partitions, substantially as and for the purpose herein set forth.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

THOMAS WILLIAM EMERY.

WILLIAM SPENCE. Witnesses:

Guo. W. EMERY, Louis Fnnsna, Jr.

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