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Publication numberUS1604271 A
Publication typeGrant
Publication dateOct 26, 1926
Filing dateDec 7, 1925
Priority dateDec 17, 1924
Publication numberUS 1604271 A, US 1604271A, US-A-1604271, US1604271 A, US1604271A
InventorsFriedman Ferdinand J
Original AssigneeFriedman Ferdinand J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Furnace equipment
US 1604271 A
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Description  (OCR text may contain errors)

Oct. 26 1926.

F. J. FRIEDMAN FURNACE EQUIPMENT Filed Dec. '7, 1925 1N HUN 1 OR Eu. FRIEDMA N ATTORNEYS Patented oer. 26,1926.



Application filed December 7, 1925, Serial No. 73,762, and in Canada December 17, 1924.

This invention relates to new and useful improvements in furnace equipment and is particularly adaptable to furnaces burning pea coal or screenings, and the object of the invention is to provide a forced draft equipment of simple construction which will assist in withdrawing the heavy discharge of explosion due to the rapid accumulation of gases 1n the furnace when using bituminous coal, pea coal or screenings.

' In burning bituminous, pea coal or screenings in furnaces, difliculty has been encountered in withdrawing the enormous amount of gaswhich accumulates within the furnace when blowing up a smouldering fire and accidents have occurred due to the explosion of said gases.

In my invention. I provide means for tapping some of the air supplied by an' under grate forced draught blower to increase the draught in the furnace above the fire, so that the products of combustion may be quickly withdrawn from the furnace.

draught equipment.

Referring more particularly to the drawing, 11 designates a furnace of the usual con- .therethrough. A smoke. or gas discharge pipe 19 is provided between the 'furnace smoke outlet-15 and the chimney (not shown). Between the blast pipe, 16 and the smoke pipe 19, air air duct or pipe 20 is provided, the lower end 21 of which is situated within the blast pipe 16"and bent towards theblower, as designated at 22. The upper end 24 of the pipe is positioned within the smoke pipe 19 and may be rovided with a nozzle 23. The discharge cm the "nozzle is in the direction of the arrow 25.

A Venturi tube 26 may fitted within the In the drawings, I have shown a partial sectional elevation of my improved forced pipe 19 in close proximity to the end of the nozzle 23, to increase the efiiciency of the draught through the pipe 19 in the well known manner. A damper or wing valve 27 may be placed in the pipe 19 to regulate the discharge of gases from the furnace.

In the drawing, I have shown the device in its simplest form, but it will be readily understood that modifications may be made in the construction without departing from the spirit of the invention.

In operation the device is very simple. To liven up a smouldering fire of closely packed pea coal or bituminous coal, the

blower is set in operation and a continuous blast of airv is driven through the pipe 16. Some of the air is driven into the furnace through the ash pit under the fire, which is packed on the top of the grate, while the rest of the air passes through the air duct or pipe20, through the nozzle 23 and direct to the chimney, not shown. This construct on creates a draught in the pipe 19 to withdraw the gases from. the furnace above the fire, thereby preventing accumulation ofsaid gases to such an extent thatan explos on might occur. It also assists in drawing the air delivered to the underside of the fire through the closely packed coal. thereby increasing the efliciency of the furnace. To further assist the efliciency of the demos. the

'Venturi tube is fitted in close proximity to the air duct.

Having thus described my invention. wnat I claim is The combination of a furnace having a grate and an outlet pipe for the products of combustion, an air blowerrhaving an a1r discharge pipe leading into the lower part of the furnace to supply air thereto at a point loo

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2452329 *Sep 16, 1946Oct 26, 1948 Stoker controlled heating system
US2517446 *Nov 5, 1945Aug 1, 1950Stewart Warner CorpFog suppressing gas burning heater system
US2521867 *Oct 22, 1946Sep 12, 1950Ott Oran WForced air heating system
US2722372 *Apr 2, 1952Nov 1, 1955John E MillerDraft control apparatus
US3961587 *Nov 20, 1974Jun 8, 1976Yugenkaisha Sankyo FurnaceCombustion equipment in which humid combustible excreta and disposed materials such as livestock excreta, paper sludge can be burnt spontaneously
US4149453 *Apr 19, 1977Apr 17, 1979John Zink CompanyNo-plume device
US4920866 *Apr 5, 1989May 1, 1990Michael HobanAnti back draft device for flue
US5351633 *Dec 16, 1992Oct 4, 1994Dovetech, Inc.Balanced pressure solid fuel heating unit
US5359945 *Mar 25, 1994Nov 1, 1994Dovetech, Inc.Balanced pressure solid fuel heating unit
US5522327 *Oct 27, 1994Jun 4, 1996Buckner; Carrol E.Balanced pressure solid fuel heating unit
DE3345202A1 *Dec 14, 1983Jun 20, 1985Franklin SchmidtApparatus for the reduction of the dew point temperature of exhaust gases
DE3627952A1 *Aug 18, 1986Mar 5, 1987Econosto NvHeizanlage
EP0062854A1 *Apr 2, 1982Oct 20, 1982Honeywell B.V.Gas-fired water or air heater
EP0062856A1 *Apr 2, 1982Oct 20, 1982Honeywell B.V.Control device for a gas-heated boiler of a warm-water heating installation
EP0908677A2 *Jul 28, 1998Apr 14, 1999Metallgesellschaft AGPipestill heater
WO1992011493A1 *Dec 17, 1991Jun 18, 1992Dovetech IncBalanced pressure solid fuel heating unit
WO1992012385A1 *Dec 26, 1991Jul 23, 1992Michel LangDevice for causing open fireplaces to draw separately from the air in the room
WO2005008131A1 *May 20, 2004Jan 27, 2005Clemente SturialeDevice for increasing draught in chimneys
U.S. Classification110/160, 110/309, 417/155
International ClassificationF23L5/00, F23L17/00, F23L17/16, F23L5/02
Cooperative ClassificationF23L17/16, F23L5/02
European ClassificationF23L17/16, F23L5/02