US1047676A

US1047676A - Cast-iron blast-heater.

Info

Publication number: US1047676A
Application number: US66931412A
Authority: US
Inventors: Konrad Meier
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-01-04
Filing date: 1912-01-04
Publication date: 1912-12-17
Anticipated expiration: 1929-12-17

Description

K. MEIER. CAST IRON BLAST HEATER. APPLICATION FILED JAN. 4, 1912.

Patented Dec. 17, 1912 2 SHEET5-SHEET 1.

. Ira Emmi? Jibizrad Wafer ATTORNEYS K. MEIER.

CAST IRON BLAST HEATER APPLIGATION FILED JAN.4,1912.

Patented ue0. 17, 1912 2 SHEETSSHEBT Z.

WITNESSES 51 6. mm/roe w M rjll ad %z6/' r By ,7 AITORNEYS water or other heatlng medlum, and its obsistance to the flow of air and reduce the heating chambers, the said air passages be- Fig. 3 is a side elevation of the same; Fig.

' blast'heater; and Fig. 6 is a side elevation earners.

the city of New York cleaning.

shaped to form passages between them for CAST-IRON BLAST-HEATER.

To all whom it may concern:

Be it known that I, KONnAo MEIER, a citizen of the United States, and a resident of borough of Manhattan, in the county and State of New York, have invented a new and Improved Cast- Iron Blast-Heater, of which the following is a full, clear, and exact description.

The invention relates to heating apparatus for heating air by the use of steam, hot

ject isto provide a new and improved cast iron blast heater, arranged to provide a large heating capacity for the air in a comparatively small space, to permit increased velocity of the air and to minimize the repower required for forcing or drawing the air through the heater, and to avoid dead air spaces and thereby make the heater self- For the purpose mentioned. use is made of heating chambers or sections for the passage of the heating medium having the shape of an elongated ovoid in cross section with short pointed head and fine elongated tail; the heating chambers being spaced apart and the passage of the air to be heated by contact with the exterior surfaces of the said ing alternately contracted and expanded at a right angle to the direction of the flow of the air through the said air passages. 1 A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of referenceindicate corresponding parts in all the views. Figure 1 is a side elevation of the cast iron blast heater installed in connection with or as a part of a heating and ventilating apparatus; Fig. 2 is an enlarged cross section of a heating chamber coupled to an-' other heating chamber shown in elevation, the section being on the line 2-2 of Fig. 3;

4 is a sectional plan view of the same on the line 4% of Fig. 1; Fig. 5 IS a sectional plan now of a modified form of the cast 1IOI1 of part of one of the chambers shown in the modified form illustrated in Fig.

The cast iron blast heater A, as shown in Fig. l. is arranged within or forms part of a duct B provided at its inlet end with ad- Specification of Letters Patent.

Application filed January 4,

Patented Dec. 17, 1912. 1912. Serial No. 669,314.

mission valves or regulating dampers C for controlling the inflow of the air to be heated, and the discharge end of the duct B connects with a fan or a blower D for producmg a suction action in the duct B and the heater A: and forforcing the heated air into a 'manifold E from which lead branch pipes E to the rooms F to be heated. 5

The cast iron blast heater A is formed of heating chambers or sections G, the interior cross section of each chamber or section be. ing in the form of an elongated ovoid, and the exterior cross section of each chamber or section being in the form of an elongated ovoid having a short pointed head and a fine WENT OFFICE.

elongated tail, the heating chambers or sections being fastened together in spaced relation in transverse rows and these rows being placed ad acent one another in parallelism so that the heads of one row lie between the tails of the adjacent row and the longitudinal rows formed are staggered and the chambers or sections of alternate transverse rows are alined. The heads of the chambers or sections are directed against the stream of air, passing through the heater in the direction of the arrow a. chambers or sections G in a transverse row are connected with each other by nipples I, and one outermost section is'connected with a pipe J connected with a boileror other source of steam, hot water or other heating medium.v The other outermost section of a row is normally closed by a plug. The lower ends of the heating chambers G in a trans-' verse row are connected with each other by nipples K, and'one outer section is connected with a pipe L for carrying Ifl the water of condensation or returning fluid to a suit- The upper ends of the v able place of discharge. The section at the: I

other end of a transverse row is normally closed by a plug. Thus by the arrangement described steam or hot water or other suitable heating medium is passed through the heating chambers G, so as to heat the same and thus heat the air passing through'the passages H by contact with the exterior surfaces of the heating chambers.

gThe heating chambers G are arranged in such a manner that the air passa es H between the longitudinal rows of heating chambers are undulating as shown, and the heating chambers in adjacent rows are staggored, and the forward end G of a heating chamber G in one row extends between opposite heating chambers of the next flanking row in front and behind, as will be readily By reference to these figures it will also be noticed that the air passages are alternately gradually contracted at H and gradually expanded at H in the direction of the width of the air passages, that is, at a right angle to the low of the air through the air passages. It will further be noticed that the curves on which the area for the air passages H is contracted are shorter than those on which they are expanded thereby forming easier deflection of the air current at the point where the momentum of the air is highest. It will be noticed that the sections are so arranged that a short curve on one section confronts or is opposite to a long curve on the adjacent section, and hence the passa e contracts or expands due to the dif:

i ference in the rate of curvature of the confronting walls of the passage.

It is expressly understood that the peculiar curvature given to the air passage as shown and described, is designed to convert the static head of the air into the dynamic head and r econvert the dynamic head into the static head and thereby minimize the repeated losses of head incidental to concentrations and enlargements of area. Owing to the particular design of the air passages the free area of the air passages can be materially reduced without appreciable reduction of the air volume and close and steady contact of the air with the exterior surfaces of the heating chambers is secured at the highcst speed obtainable. v

The overlapping of the heating chambers or sections reduces the repeated drop of speed between the several rows which causes most of the pressure loss; in other words, the high speed of air is kept up more continually, keeping up the heating efiiciency While reducing space, and at the same time keeping down the resistance to the flow of air. It is further understood that by alternately gradually increasing and expanding the air passages the velocity of the air is gradually increased or decreased thereby minimizing the resistance and reducing the power necessary to force the air through the passages at the-same time pern'sitting the increased velocity of air and producing high efficiency of the heating surface. By constructing the air heating chambers in the manner described sharp angles and dead air spaces are avoided and the formation of air eddies is prevented, at the same time the air is thoroughly split up during its travel through the air passages so as to insure proper contact of the air with the external surface of the heating chambers.

In order to hold the heating chambers G of a row in proper alinement with each other, the front ends G of the said chambers fit at their upper and lower ends beas plainly indicated in Fig. 5.

tween lugs G3 arranged on the top and bottom flanges Gr and G of the next-following heating chambers, as will be readily understood by reference to Figs. 3 and 4. The al- 1 t'ernate outermost heating chambers G connect with each other by plates N, as plainly shown in Fig. 4, so that it is not necessary to provide an extra shell for the heating apparatus. In the modified form shown in Figs. 5 and 6 the heatin chambers G have their front and rear en s G and G extended in such a manner that the front end G of one heating chamber in a row is in close roximity to the rear end G of the next following heating chamber, but the passages H formed between adjacent rows arealternately gradually contracted and gradually expanded in the same manner as above described in reference to the heating chambers G shown in Fig. 4., The heating chambers G are provided on their exterior surfaces with longitudinally-extending spaced ribs Gr to increase the heating surface of the said heating chambers. By the arrangement described the plates N above mentioned and shown in Fig. 4. are not necessary, and the outermost rows of heating chambers can be covered with a suitable covering material 0,

It will be noticed that the heating cham ,bers are provided integrally with top and bottom flanges or plates G, G tting one against the other to form a smoo h top and bottom for the air passages H and at the same timethe nipples or joints I and K are located above and below'the saidtop and bottom plates, that is, outside of the air passages, and hence the joints do not form obstructions in the air passages and the heating chambers are easily joined together outside of the air passages.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A cast iron blast heater, comprising radiating elements each having an exterior cross section in the shape of a longitudinal section of an ovoid provided with a pointed head having short curves and an elongated tail having long curves, the radiating elements being arranged in transverse rows, and the said radiating elements in each transverse row being spaced apart, and the ra'diati'ngfelements of alternate transverse rows being alined ina longitudinal direction to form longitudinal air passages, the radiating elements in successive longitudinal rows being staggered and the said heads of the radiating elements in one transverse'l25 row extending between the said tails of the radiating elements of an adjacent row so that confronting walls of the air passages have different rates of curvature and the areas of the air passages vary accordingly.

2. A cast iron blast heater, comprising radiating elements having a cross section in the shape of the longitudinal section of an ovoid provided with a short pointed head having short curves, and a fine elongated tail having long curves, the radiating elements being arranged in spaced relation in transverse rows, the rows being spaced adjacent one-another, the radiating elements of alternate transverse rows being alined in parallelism, and the heads of the radiating elements in one transverse row extending between thetails of the radiating elements of an adjacent row so that the confronting walls of the air passages formed have different rates of curvature and the passages contract and expand.

3. A cast iron blast heater, comprising radiating elements each having an exterior cross section in the shape of the longitudinal section of an ovoid provided with a short pointed head lRIVIIIg SlIOI'lJ curves, and a fine elongated tail having long curves, the radiating elements being arranged in spaced relation in transverse rows and longitudinal rows to form longitudinal air passages, and the said radiating elements of alternate transverse rows being alined and the longitudinal rows being staggered, the heads of the radiating elements in one transverse row extending between the tails of the radiating elements of an adjacent transverse row so that the confronting Wallsof the air pasrows to form longitudinal airpass'ages, and

the said radiating elements of alternate transverse rows being alined and the longitudinal rows being staggered, the heads of the radiating elements in one transverse row extending between the tails of the radiating elements of an adjacent transverse row'wso that the confronting walls of the air p'assages have diflerent ratesof curvature and each air passage alternately contracts. and expands in the direction of the length of the air passage, and means connecting the outer- ;most radiating elements with each other.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

KONRAD MEIER.

Witnesses FRANK T. CHAPMAN, THEO. G. HOSTER.