US1763687A - Retort - Google Patents

Description

June 17, 1930. s, CHADwlCK ET AL 'RETORT Filed rawh 1'? 1928 Ihmentomr Mw Nm Q,

M www Patented June 17, v1930Y UNITED* STATES .PATENT CFI-ICE LEE S. CHADWICK, or SHAKER HEIGHTS, ANEMAEC EEsEiLoE CLEVELAND HEIGHTS, oHIo, ASSIGNoES rro PEEEECTVION sToVE COMPANY, 0E CLEVELAND, oHro, A Conf PoEATIoN 0E oHIo ApplicationY md Marcily 17, 192s.` serial No. 262,580.

This invention relates, generally, to improvements inf liquid fuel burners of the retort class, and more especially to improvements in the retorts or generators used in 5 conjunction with such burners.v 1

For illustrative purposes we have herein disclosed our vinvention as embodied in the type of retort used in liquid fuel cook stoves, examples'ofwhich will be found in our copending applications Serial Nos. 126,366and andDecember 6, 1926. The present invention is applicable, however, to different types or styles of retorts so long as` they are characterized by a hollow body enclosing a generating chamber and having a threadedbore leading therefrom to a gas emitting orifice, and a threaded stem operating lwithin said bore, the stem, in most cases, carrying an axial needle for rvcooperation with the orifice; there, being a passageway through which the gas escapes from the generating chamber along the threaded portion of the stem to the' orifice. y

Heretofore, with retorts of this character, spasmodic sputterings and spurtings of liquid hydrocarbon have attended their 0peration which interfere greatly with the action of the` main burner toV which -gas is supplied by the retort, reducing the efficiency of said burner Vand causing incomplete combustion-and effecting red streaks in the flame. It was discovered that this trouble occurred only under certain adjustments of the retort control stem, and upon close investigation it was ascertained that the difficulty arose when the straight passageway or channel heretofore cut or Ymilled along the threaded portion of the stem for the passage of gas from the generating chamber to the orifice was at or near the bottom side of the bore wherein the spindle operates. Under these conditions, small bubbles or drops of the liquid hydrocarbon which reached the forward end of the generating chamber escaped through the pas.-

sageway and issued from the orifice in un-V Vaporized condition, causing the undesirable effects aboveV described.

It is the purpose of our` present invention 152,798, filed, respectively, August 2, 1926,A

to obviate this difliculty byA substituting forA the heretofore straight, longitudinal passageway or channel in the threaded portion of the stem, a passageway of such shape,

character or location as will compel the fuelV expelledfrom the generating' chamber to travel upwardly to, or rise toward, the upper portion ofthe bore whereinthe stem operates before reaching vthe gas emitting orifice. It is found that this very effectively prevents liquid hydrocarbon from escaping from the generating chamber and reaching the gas'emitting orifice of therretort before itis thoroughly broken up `and vaporized.

An embodiment of the invention is Villustrated in the accompanying drawing wherein Fig. 1 is a fragmentary sectional elevation of a stove incorporating our improved retort; Fig. 2 is an enlarged longitudinal section through the retort; and Fig. 3 is fa transverse section on the line 3-3 of Fig. 2. The stove structure wherewith we have associated our invention for the purpose of the present .disclosure includes a top 1 and a Vertical panel 2, and suitably supported beneath Vthe top 1 is a manifold 3 which has connection with a burner 4 thatis situated below an opening 5 inthe stove top, all of which is in accordance with common practice. Shown as formed integral with the manifold 3 is a mixer 8; and rising along-the outer side of thepanel 2 is a fuel supply Pire 9- The' retort, which is designated generally by the reference numeral 10, is in the form of a long tubular body that is adapted to Vbe projected through an aperture inthe panel 2 and across the burner 4 and have vits discharge end extended through an opening Aprovided for the purpose in the end wall of the body 12, and forwardly of said chamber the body is reduced in diameter and is formed with an axial bore 17 that is internally threaded from its junction with the chamber 1G throughout a material portion of its length, as indicated at 18. The extreme forward end of said bore is also threaded for the reception of a cap 19 having a port 2O that converges forwardly adjacent its outer end where it terminates in a reduced portion 21 that constitutes the gas Vemitting orifice of the retort. Intermediate its threaded portions, the bore 17 is restricted by an annular wall 22, the rear face of which is beveled to constitute a valve seat 23. Within the threaded portion 18 of the bore 17 operates the threaded portion 24 of a stem 25 formed, a suitable distance forwardly of its threaded portion, to provide a valve 26 that cooperates with the seat 23, and extending axially from the forward end of said stem is a needle 27 which is adapted to enter the port 2O and, by coo aeration with the tapered portion thereof and with the orilice 21, control the passage of gas through said orifice. The valve 26 is utilized to positively shut off the flow of gas from the retort, when de- Sired.

A spiral groove or channel 30 is milled or otherwise formed about the stem 25 in the region of its threaded portion 24 to provide a passageway for the escape of gas from the generating chamber to the gas emitting orifice 21. By so forming the passageway, the hydrocarbon is compelled to rise a material distance above the bottom portion of the bore wherein the stem operates and in so doing any which may escape from the gen erating chamber in liquid condition is broken up and thoroughly vaporized.

lVhere the stem 25 extends outwardly through the rear Vend of the head 13, the joint between the stem and head is closed by the usual packing gland 32; and the stem is equipped beyond the head with an operating handle 33.

Having thus described our invention, what we cla-im is:

1. A retort comprising a substantially horizontally disposed, elongated hollow body enclosing a generating chamber `and having a threaded bore leading therefrom, and a stem having a. threaded portion operating within said bore, there being a passageway,

between opposed surfaces of the stem and body that leads past the threaded portion of the stem and extends diagonally of the threads and at least a part of which passageway is at all times a material distance above the bottom of the bore irrespective of the adjustment of the stem.

2. A retort comprising a substantially horizontally disposed, elongated hollow body enclosing a generating chamber and having a threaded bore leading therefrom, and a stem having a threaded portion operating within said bore, there being a passageway between opposed surfaces of the stem and body that leads past the threaded portion of the stem and extends diagonally of the threads and is inclined with respect to the axis of the bore.

3. A retort comprising a substantially horizontally disposed, elongated hollow body enclosing a'generating chamber and having a threaded bore leading therefrom, and a stem having a threaded portion operating 'within said bore, there being a spiral passageway between opposed surfaces of the stem and body that leads past the threaded portion of the stem and is of considerably greater pitch than the threads.

4;. A retort comprising a substantially horizontally disposed, elongated hollow body enclosing a generatingchamber and having a'threaded bore leading therefrom, and a stem having a threaded portion operating within said bore, the stem having a groove in its threaded portion that is inclined to its and cuts diagonally through the threads.

5. A retort comprising a substantially horizontally disposed, elongated hollow body enclosing a generating chamber and having a threaded bore leading therefrom, and a stem having a threaded portion operating within said bore, the stem having a spiral groove about its threaded portion that is of considerably greater pitch than the threads.

In testimony whereof, we hereunto affix our signatures.

LEE S. CHADWICK. MARC RESEK.

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