US865081A - Condensation-preventer. - Google Patents

Description

EDWY O. CAPEN, OF BUFFALO, NEW YORK.

CONDENSATION -PRE VE NTER.

Specification of Letters Patent.

Patented Sept'. 3, 1907.

Application sied october 16,1906. serial No. 339,167.

To all whom it may concern:

Be it known that I, EDWY O. OAPEN, a citizen of the United States, and a resident of Buffalo, Erie county, State of New York, have invented certain new and useful Improvements in Condensation-Preventers; and my preferred manner of carrying out the invention is set forth in the following full, clear, and exact description, terminating with a claim particularly specifying the novelty.

This invention relates to window ventilators, and more especially to those devices which are adapted for prevention of condensation.

It is well known by locomotive engineers, street car motormen, and others whose calling requires them constantly to look through a window from Within a cab or the like, that in wet or cold Weather moisture or frost will accumulate on the inside of the glass and render it difficult and in some cases impossible to see out. To overcome this difficulty I have constructed a Window ventilator designed to maintain the air next the inner face of the glass at the same temperature as that next its outer face. ln an application for patent bearing Serial Number 296,563, filed by me on Jan. 17,1906 and allowed on September ll`, 1906, this structure is broadly described and claimed as `consisting of openings in the frame next the pane for admitting the external air which strikes the glass, passing it around the edges of the latter, and directing it in jets across its inner face.

The present invention consists in arranging the openings in the frame out of lateral alinement with each other so that the jets will break joint and the incoming cold air at each side of the glass Will have an opportunity to flow practically entirely across the inner surface of the pane without being interrupted or retarded by the jets at the other side.

The present invention also amplities certain details of construction which I have found to be of advantage in a ventilator of this character.

In the accompanying drawings-Figure 1 is an insideA elevation of the front panel of an engineers locomotive cab, with the lower part of the inner beading removed.4

Figs. 2 and 3 are sections through the same on the lines 2-2 and 3 3. Fig. 4 is a detail view ofthe upper end l of one of the inner beadings, viewed from the surface which lies next the glass. Fig 5 is an enlarged sectional detail of a form which may be used in some cases.

While this window may well be used at other places, I have illustrated it of the shape commonly employed in the front of a locomotive cab. The shape and size is immaterial, but usually the Window will stand squarely at right angles to the line of progress and its outer surface will receive the impact of a strong current of air which cools the glass on the exterior, while its interior the invention is to admit the colder air and direct it across the inner surface of the glass so as to equalize the temperature on both surfaces while yet not allowing the cold air to blow into the opcrators face.

The letter F designates the frame of the Window, and G the glass.n The latter, instead of resting against a shoulder in the frame as usual, is held therein between outer headings O and inner beadings I, either or both of which may be removable for the purpose of inserting or replacing the glass. By preference the outer beading is .of one size throughout, and by preference the inner beading has projections P at intervals whichextend a little further inward over the inner face of the glass than the remaining portion of the beading. Or, as shown in dotted lines in Fig. 4, the inner beading could be of one width throughoutthe same Width as the projections P shown in full lines. But the wider inner beading (Whether wider throughout a portion or the whole of its length) offers a strong shoulder for the glass, to resist the impact of air on is o uter face.

The glass G preferably fits Within the frame F and its edges are held by contact therein, but cut into said frame at points opposite the projections are recesses R, best seen in Fig. 8. The inner faces ofthe headings (that is, those faces next to the glass) are cut-away slightly as at V at points opposite said recesses R; and the cut-away portions and recesses therefore coactvto produce passages for the iniiow of air from next the outer face of the glass. By preference these passages are about seven inches in height on the side headings, although I do not limit myself to that size and I believe it is clue to their existence that a certain cushion effect is produced behind the glass whereby the latter is liess liable to breakage than if the inner beading was entirelysolid. This cushion effect also exists whether the inner beading has the projections P or is of one width throughout, and is quite a point of advantage in locomotives Where the front window so often cracks or breaks.

It will be observed in Fig. 1 that the projections VP at opposite edgesof the Window are in staggered rela- D tion to each other, rather than opposite each other as in my former patent. The result is that the incoming air at both edges of the glass is permitted to ow entirely across its inner face, as the jets entering at one edge break joint with those entering at the other. This arrangement I consider highly important, as it leaves no portion of the pane on which frost or condensation might form. Another detail in the present case as shown in Fig. 4 is an addition to my former patent. This consists in cutting small kerfs K in the inner face oi the inner beading from its uppermost cutaway portion V obliquely upward to the inner edge o this beading, and through the rounded end of the projection P it the latter is used-a detail which I find advantageous in the corners o a Window (such for instance as shown in Fig. l) for the purpose oi directing tiny jets of cold air into those corners and keeping them entirely free from rost and condensation.

In use, the air striking the glass G is deflected and spread over its outer surface and thrown radially against the outer beading O. Entering the cut-away portions V therein, it passes around the edges oi the .glass through the recesses R in the frame, and is directed into the cut-away portions V o the inner beading I. These cut-away portions are formed by preference under the projections P, and hence the iniiowing jets of air are directed from the several edges oi the glass over and across its inner face, rather Ythan being permitted to blow toward and into the face and eyes of the engineer. By the word edges I reer here to the upper edge and both sides as shown in Fig. l, as it is ordinarily unnecessary to have these openings at the lower edge oi the pane although they might be formed there ii desired.

In Fig. 5 is illustrated on a somewhat larger scale a slight variation which I find it desirable in some cases to employ-especially where the pane oi glass is quite wide or large. In such cases and under some circumstances the blast of air admitted around the edges oi the glass may not be directed across its inner surface with suflicient force. In order to give more impetus to the incoming air, it will be seen in this view how the outer beading O may be cut away at V at an incline so as to present a rather large mouth or the inlet of the outside air; also how the recess R/ may be larger and possibly rounded at its bottom to admit of the free passage of the air; and also how the inner beading Imay have its cut-away V2 tapered or under-cut, so

as to be larger where it communicates with the recess R I and smaller where the jet of air issues on the inner iace of the glass. In practice I find that this construction directs the jets with considerably more force across the inner face of the pane, than the other.

What is claimed as new is:

1. A condensation preventer consisting of a pane of glass and its frame, and openings in the latter next the pane for admitting the external air which strikes the outer face of the glass and directing it from the sides and across its inner face in jets which are out of alinement with each other.

2. A condensation preventer consisting of a pane of glass and its frame, and openings in the latter next the pane for admitting the external air which strikes the outer face of the glass and directing it from the top edge downward j over its inner face and from the two upright edges inward over its inner face in jets arranged in staggered relation to each other. j

3. A condensation preventer consisting of a pane of glass, a frame surrounding its edges and having recesses at certain points next said edges, and the outer and inner headings holding the glass in the frame and 'cut away at4 points to communicate with said recesses, the recesses in -the side hars of the frame being located out of horizontal alinement with each other, for the purpose set forth.

4. A condensation preventer consisting of a pane of glass, a frame surrounding its edges and having recesses at certain points next said edges, and the outer and inner headings holding the glass in the frame and cut away atthe inner headpoints to communicate with said recesses, ing being wider than the outer heading, for the purpose set forth.

5. A condensation preventer consisting of a pane of glass and its frame, and openings in the latter next the pane for admitting the external air which strikes the outer face of the glass and directing it from the 'sides across its inner face, and additional openings branching from said rst-mentioned openings next the inner face of the pane for directing the inowing air into the corners of the window, for the purpose set forth.

(i. A condensation preventer consisting of a pane of glassy a frame surrounding its edges and having recesses at certain points next said edges, the outer and inner.

headings holding the glass in the frame and cut away at points to communicate with said recesses, projections on the inner heading at the points where it is cut away,"

and kerr's in the inner heading next the glass leading from the cut-away portion therein and directed toward the.

corners of the pane, as and for the purpose set *foi-th,

In testimony whereof I have hereunto Ysubscribed my signature this the 13 day of October, A. D. 1906.

EDWY O. CAPEN.

Witnesses GEORGE Sm'rz, ARCHIE D. LELAND.

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