US949147A - Steam-boiler superheater. - Google Patents

Description

F. J. COLE & H. B. OATLEY.

STEAM BOILER SUPERHEATER.

APPLIGATION FILED JULY 1. 1909.

Patented Feb. 15, 1910.

3SIIEETS-SHEET 1.

WITNESS:

F. J. COLE & H. B. OAKLEY.

STEAM BOILER SUPERHBATER.

APPLICATION FILED JULY 1. 1909.

Patented Feb. 15, 1910.

3 SHEETS-SHEET 2.

P. J. COLE & H. B. OATLEY.

STEAM BOILER SUPERHBATER.

APPLIUATION FILED JULY 1, 1900.

949, 147 Patented Feb. 15, 1910.

3 SHEETS-SHEET 3.

will/MW iii Tit).

UNITED STATES PATENT OFFHJE.

FRANCIS J. COLE AND HENRY B. OATLEY, 0F SCHENECTADY, NEW YORK.

STEAM- OILER SUPERHEATER.

To all whom it may concern:

'Be it known that we, FRANCIS J .COLE and HENRY B. OA'rLnY, both of Schenectady, in the county of Schenectady and State of New York, have jointly invented a certain new and useful, Improvement in Steam-Boiler Superheaters, of which improvement the following is a specification.

Our present invention relates to steam boiler superheaters of the fire tube type, and its object is to provide means whereby the flow of hot gases from the firebox, through the superheating tubes in which the pipes of the superheater are located, will be automatically shut oli when the locomotive in which the su-perheater is applied is drifting or running with a closed throttle, and when, consequently, no steam is passing through the superheater pipes, in order to revent the overheating of the pipes, which, if the application of the heat of the gases is continued under such conditions, is'liable to occur.

The improvement claimed is hereinafter fully set forth.

,In the accompanying drawings: Figure 1 is a vertical longitudinal central section through the forward portion of a locomotive boiler having our invention applied; Fig. 2, a. side View, in elevation, of the same; Fig. 3, a vertical transverse section through the smoke box; .Fig. 4, a longitudinal cen tral section through the damper cylinder; and, Fig. 5, a transverse section through the same, in the plane oi. the operating shai't.

Our invention is herein exemplified as applied in connection with the superheater which is set forth in Letters Patent oi the United States No. 875,895, granted and issued to Francis J. Cole, under date of Janumy 7, 1908, but is not, in any wise, limited in application to this or any other specific construction of fire tube supcrheatcr, 'lhe superheater pipes, 60, in the design selected for illustration, extend longitudinally in superheating 'tubes, 67, which a re of larger diameter than the ordinary fire tubes, 4., and are located in the upper and middle portion oi the space within the shell of the boiler, 4. After emerging from the superheating tubes, the superhcater pipes extend forwardiy and laterally to connections with steam headers, 70, on the sides of the smoke box, 4?, across which the ordinary inclined diaphragm or deflecting plate, 4: extends, forward oi the front flue sheet, 4.

Specification of Letters Patent.

Application filed July 1, 1909. Serial No. 505,889.

Patented Feb. 15, 1910.

In the practice of our invention, we provide a partition plate, 4", which projects forwardly and downwardly from the front tiuc sheet, 4, and extends entirely across the. boiler, said plate serving, with the deflect ing plate, 4, and the boiler shell, to form a discharge chamber or passage way, into which the gases of combustion are discharged from the superheating tubes, 67, and through which they are compelled to pass in their traverse to the smoke box and stack. The opening between the front edge of the partition plate, 4", and the deflecting plate, 4, which afl'ords exit to the ases from this chamber, is controlled by a plate metal damper, 72, upon the ends of which are secured journals, 7 2, which are mounted and vibratable in bearings, 72", secured to the sides of the smoke box. By the a propriate movements of the damper journa s in their bearings, the exit opening of the gas discharge chamber may be uncovered fully, (except as to the thickness of the damper),

as shown in full lines in Fig. 1, or may be- -ent1rely closed, as shown in dotted lines, the

latter being the position the damper is intendethto occupy when the locomotive is running with steam shut ottfrom the cylindcrs.

The automatic opening and closure of the dam 'ier, when the locomotive is running with the throttle opened and closed, respectively, are ctl'ectcd by the following means. A damper cylinder, 73, is secured to a bracket or support, 7 1, fixed to one side of the smoke box, 1-, and is titted with a piston, 75, formed integral with or fixed to a piston rod, to", which is guided in theend portion of the cylinder farther from the piston and in the bore oi a partition, T3,.adjacent to the middle portion of the cylin'derz. The end of the cylinder farther from the piston is closed by a screw cap, 73", and the end nearer the piston is closed by a screw cap, 73", from which a steam supply pipe, 75", leads to the valve hest, 12", oi the steam cylinder on the side of the loconmtive on which the apparatus is located. A rocker chamber, 73,

which is closed'at its bottom by a removable cap, (-1, C(Hlllllllllltfflit'fi at its top with, and projects downwardly fun i, the central por tion of the cylii'ider, 73. An operating shaft, Tt', is journaled in transverse hearings in the rocker chainbcr, and projects through a siufiing box, 73, outwardly therefrom in the direction of the smoke'box. A rocker, 77,

v and annoyance ca is keyed on the operating shaft, and projects into a longitudinal slot, formed in the piston rod, 75, so as to be moved to the )ressure to the iston 75. 1 a

An arm, 78, which is secured on and projects downwardly from the outer end of the operating shaft, 76, is coupled by a pin.

78 to an upwardly extending link,- (9, the 5 pin, 78, passing through a longitudmal slot j ten'tion to or renewal of packing.

in the link. The upper end of the link, 79, is pivoted to the shorter arm of a bell crank or elbow lever, 80, fixed on the outer end of the adjacent journal, 72*, of the damper, 72, i J

i of an oscillatory damper controlling the flow and having a counterweight, 81, fixed on the end of its longer arm. A hand lever, 82, is 1 pivoted to swing about a fulcrum, 82, in the f 1 pressure mecnamsin for rocklng sald shaft cab of the locomotive, and is coupled, by a may be held by a thumb latch, 82 and carries a pointer, 82 which traverses over a segment, 82, on which may be marked indications showing the open, closed, and

a damper cylinder having a communicating ,rockerchamber, an operating shaft journaled in said rocker chamber. and coupled to the 9 intermediate positions of the connected damper, 72.

In, the operation of the appliance, the counterweight, 81, drops by its gravity into the position shown in dotted lines in Fig. when-steam is shut off from the cylinders of the locomotive,v and thereby moves the damper, 72, into, and holds it in, closed position, during the periods in which the throttle is closed; \Vhen steam is admitted to the cylinders, it flows through the pipe, 7 5*, into the right hand end of the damper cylinder, 73, and moves the piston thereof to the left, thereby, through the rocker, 77 and the operating shaft, 76, and its connections, l turning the damper into full open position,

t e cylinders, the hand lever, 82, is moved forward to the appropriate position, as

shown by the indications on the scale, 82,

and the link, 79, is thereby swung. forward upon the pin, 78*, as a fulcrum, its movement acting, through its connections, to parhand lever with the damper, a segmentfixed tially or wholly close the damper, in correspondence with the traverse of the hand lever.

Qur improvement attains the substantial practical: advantage of obviating the danger sed by, the escape of steam from the damper cylinder, which, in prior constructions, was such as to obscure the view of the engineer, and was found to .be

a substantial objection, and one that rev quired constant care and supervision to left, and to cause the operating shaft to be counteract. The pistons of the prior devices rocked in its bearings by the application of acted directly and therefore had tobepacked against the full pressure of the steam. In

i the construction above described, the operating shaft is rotated in the packing and is never uncovered, so that there is no tendency to the deposition of scale orother foreign matter, and no necessity for frequent atof gases through fire tubes of said boiler, an operatingshaft coupled to the damper, fluid in its bearings, a counterweight acting on the damper in opposite direction to said fluid pressure mechanism, an oscillatory hand lever, and connections coupling said hand 2. The combination, with a steam boiler, of an oscillatory damper controlling the flow of gases through fire tubes of saidboiler,

damper, a piston fitting in the damper cylinder and open continuously to an avenue of steam supply from the boiler, a rocker fixed on the operating shaft and engaging the rod of the damper cylinder piston, and a counterweight fixed to the damper in position to exert its gravity in opposite direction to the action of the damper cylinder piston.

The combination, with a steam holler,

of an oscillatory damper controlling the l How of ases through fire tubes of said boiler, a fluid pressure mechanism open con-.

tin uously to an avenue of steam supply from the boiler, a pivoted link coupling said fluid pressure mechanism to the damper, a coun- 4. The combination, with *a steam boiler,

of an oscillatory damper. controlling the flow of gases through fire tubes of said boiler, fluid pressure mechanism for rocking said damper in its bearings, a counterweight acting on the damper in opposite direction to said fluid pressure mechanism, an oscillatory hand lever, a rod connecting said concentrically with the fulcrum of the hand lever, and a pointer connected to the hand ings on the sinoke box and controlling the flow of gases through fire tubes of the boiler, a damper cylinder supported on the smoke box and having a communicating rocker 5 chamber, an operating shaft jonrnaled in said rocker chamber, a piston fitting in the di mper' cylinder and open continuously to an avenue of steam supply to the locomotive cylinder, a rocker fixed on' the operating 10 shaft and engaging the rod of the damper cylinder piston, an arm fixed on the operating shaft, a link pivoted to said armand to an arm on a journal of the damper, a counterweight fixed to the damper, an oscillatory hz'md lever, and a rod coupling said hand 5 lever to the link.

FRANCIS J. COLE. HENRY l3. OATLEY.

Witnesses:

CHARLES J. Rooms, S. W. TYLER;

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