US1120425A - Preheating device. - Google Patents

Description

G. VAN DAAM.

PREHEATING DEVICE.

APPLICATION LED MAR 27, 1914 1,120,425, Patented Dec. 8, 1914.

M will WITNESSES. INVENTOR m W V 0611M W gyflmklal A TTOR/VEY 40 a plan view of said heating element.

enmur VAN DAAM, or BUFFALO',NEW YORK.

PREHEATING DEVICE.

Specification of Letters Patent. l

Application filed March 27, 1914. Serial No. 827,660.

To all whom it may concern:

Be it known that I, GnRRrr VAN DAAM, a citizen of the United States, residing at Buffalo, in the county of Erie, State of New York, have invented a new and useful Preheating Device, of which the following is a specification.

My invention relates to improvements 111 means for delivering pre-heated air to the combustion chamber of a stove or range or similar device.

The object is to provide an improved device for the constant deliver of pre-heated air to said combustion cham er irrespective of draft conditions.

The object is also to provide a device which is adapted to withstand intense heat without injury thereto.

The device is adapted for use with the ordinary kitchen range or the French range.

Referring to the drawings, which illustrate merely by way of example, a suitable embodiment of my invention-Figure 1 1s a perspective view of a ortion of a range, with the top partly bro en away, showing my improved device in operative position. Fig. 2 is a perspective view of a portion of the tubing for conducting air to the preheating element. Fig. 3 is a perspective view of the pre-heating element with a ortion of the tubing connected therewith Fig. 4 is a fragmentary view in elevation of a portion of the tubing showing the connection with the wall of the stove or range.

Fig. 5 is a side elevation of the heating element on a larger scale. Fig. 6 1s a front elevation of same. Fig. 7 is a vertical section on line 7-7 of Fig. 9. Fig. 8 15 a vertical cross-section on line 8-.8 of Fig. Fig. 9 is a horizontal section. Fig. 10 1s Similar numerals refer to similar parts throughout the several views.

The pre-heating element 11 is preferably fan-shaped, having a rojecting nozzle 12 provided with an inta e to which is connected the conducting pipe 10. The conducting pipe 10 is connected with the extensions 2 and 8 and the elbows 3 and 9. To the lower end of extension 2 is provided the intake nozzle 1, which extends downwardly and is located below the level of the firebox or combustion chamber.

Fig. i shows a convenient method of extending the section 8 through the wall 6 of the stove, and securing the same in posi- Patented Dec. 8, 1914-1 tion by means of the nuts 5 and 7 which is preferably provided with the notch or recess 17 adapted to receive a strut or other support for the top of the stove. This also serves to maintain the position of the heating element with respect to the fire-box. The nozzle 12 of the heating element 11 connects with the channel 13, which channel spreads at its flaring end and delivers to the return channels 14 which in turn deliver to the reversing channels 15. The ends of channels 15 serve as distributing chambers and deliver through the vents 16 gets of .pre-heated air to the combustion chamber 18. It will thus be seen that the air entering through nozzle 12 is delivered almost immediately to an extremely hot portion of the walls forming part of the margin of recess 17. This serves somewhat to modify the temperature of this wall. The air then, returning through channels 14 to channels 15 becomes highly heated before being delivered through the vents 16.

The element 11 is cast in a single structure, by what is known as a cored casting, so that there are no separate parts bolted together to become distorted or bent out of shape when subjected to intense heat.

The nozzle 1 is placed below the level of the fire-box to prevent any tendency of the flow of air from the element 11 to the nozzle, but on the contrary, this arrangement serves to secure a constant flow of air from the nozzle to and through the heating element 11, whether the draft from the firebox to the flue is strong or weak.

It-has been found in previously used air heating and feeding systems that where the air intake is placed higher than the fire box or combustion chamber, that when the draft is insufficient or where the draft the forming the heating element of an integral cored cast structure this disadvantage is overcome.

. That I claim is 1. LIeans for feeding pre-heated air to a stove or range comprising an integral hollow heating element consisting of a single cored casting of fan shaped contour provided with an air intake at-the middle portion of its arc-shaped margin, and having a marginal recess in. the straight margin opposite the air intake, said hollow body provided with partitions forming channels as follows, a channel extending directly from the intake nozzle to the wall of the oppositely disposed recessed margin, two diverging channels extending therefrom and then doubling back and flanking the first mentioned channel to a point adjacent the air intake, then diverging indirections corresponding to the peripheral contour of the body to the walls' flanking the recessed portion, said channels flanking the recessed portion provided with air discharge vents, and an air conducting pipe connected with said air intake extending horizontally to the outside of the stove and then extending vertically to a point below the level of the -combustion chamber.

2. Means for feeding pre-heate'd air to a stove or range comprising an integral holas follows, a channel extending directly 4 from the intake 'nozzle to the wall of the oppositely disposed recessed margin, two diverging channels extending therefrom and then doubling back and flanking the first mentioned channel to a point adjacent the air intake, then diverging in directions corresponding to the peripheral contour of the body to the walls flanking the recessed portion, said channels flanking the recessed por-, tion provided withair discharge vents, an air conducting pipe connected with said air intake extending horizontally to the outside of the stove and then extending vertically to a point below the level of the combustion chamber, and means for securing an airtight joint between said: horizontal pipe and the wall of the stove throughwhich it pro jects.

GERRIT' VAN DAAM. Witnesses:

MAE HOFMANN, HOWARD S. OKIE.

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