US858690A - Blast device. - Google Patents

Description

PATENTED JULY 2. 1907.

R. L-WALKER- BLAST DEVICE- APPLIQATIOH rnnn JUN-E e. 1900.

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ATTORNEYS THE mmms PFTERS co, wAsnmnrou. n. c

PATENTED JULY 2; 1907.

R. L. WALKER.

BLAST DEVICE. APPLIOATION rum) JUNE 8. 1906.

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ATTORNEYS I THE NORRIS PETERS pa wAsmNcroN, b. c

- A Z. wvmgori" UNITED STATES PATENT OFFICE.

ROBERT L. WALKER, OF NEW YORK, N. Y., ASSIGNOR, BY ASSIGNMENTS, TO MALCOLM GREEN, OF BOSTON, MASSACHUSETTS, AND JAMES N. OATLOW, OF NEW YORK, N. Y.,

TRUSTEES.

BLAST DEVICE.

Specification of Letters Patent.

Patented July 2, 1907.

Original application filed January 14, 1902, Serial'No- 89,647. Divided and this application filed Tune 8, 1906. Serial No. 320.689.

To all whom it may concern:

Be it known that 1, ROBERT L. WALKER, a citizen of the United States, and a resident of New York city, borough of Brooklyn, county of Kings, and State of New York, haveinvented certain new and useful Improvements in Blast Devices, of which the following is a specification, taken in connection with the annexed drawings, forming a part of the same.

This invention relates to smoke consuming locomotives, and particularly to the blast devices in the locomotive to insure at all times the proper amount of air being supplied to the fire box, and is adivision of my application Serial No. 89,647, filed January 14, 1902, for smoke consuming furnaces, patented May 22, 1906, No. 821,268.

In the accompanying drawings showing illustrative embodiments of this invention, and in which the same reference numerals refer to similar parts of the several figures, Figure 1 is a side elevation, partly in section, of a locomotive boiler. Fig. 2 is a vertical sectional view through the blast valve. Fig. 3 is an end elevation of the locomotive boilershowing the blast device and throttle in position.

In the illustrative embodiment of this invention shown in the drawings, A is a locomotive boiler having the steam dome, D, smoke stack B and exhaust nozzle 0, located beneath the smoke stack, and X designates certain pipe and damper mechanism fully described and claimed in my patent previously referred to and which forms no part of the present invention.

In order to insure at all times a sufiicient draft through the bed of fuel in the firebox, it is desirable that when the engine is not being operated there shall be an induced draft maintained to insure a proper pressure of air and to prevent the production of smoke when fresh coal has been added to the fire. In order to accomplish this result automatically, I have the engineer open a connection from the boiler, permitting the steam to flow therefrom to the smoke stack, when he operates the throttle lever to stop the engine. I preferably accomplish this result by using a blast pipe 0-2 passing through the boiler and having its forward end G located teriorly threaded nipple l of the blast valve cylinder M. This valve cylinder consists of a hollow casing having a chamber 6 in communication with the passage M-6 of the threaded nipple 7. One end of the chamber 6 is reduced to form a seat M for the valve M-3 which may be moved inward to its seat by a spring 5 nects the chamber 6 with the passage M7 which extends through the depending screw threaded nipple 9. Mounted within the passage 8 and guided by the same,

is a valve rod M4 which passes through a suitable This rod M-4 at one end contacts normally with the latch 0, having a foot piece 0-3, and at its other end carries the valve M3. This latch is pivoted upon the pivot M-9, on the upwardly projecting arm M-8 of the blast valve cylinder M, permitting the lower end of the latch to normally rest in the path of the throttle lever A-3. The nipple 7 of the cylinder M is connected to the pipe M-ll, which at its other end is in communication with the interior of the boiler, Fig. 1. The depending nipple 9 is connected to the blast pipe C-2, which extends, as previously noted, from the cylinder M through the boiler to the interior of the exhaust nozzle O. It will be readily seen that when the valve M3 is moved from its seat M, steam from the boiler will pass through the pipe Mll, passage M-6 chambers 6, 8 and M-7, blast pipe (3-2, to the exhaust nozzle G and thence up the stack B, producing an induced draft through the bed of fuel upon the grate, not shown, of We locomotive.

Under normal running conditions, it is not necessary or desirable to permit steam to pass from the boiler through the blast pipe 0-2, as sufficient air is supplied to the fuel bed by the exhaust steam of the locomotive passing from the steam cylinders up through the exhaust nozzle 0 in the well-known manner. When, however, the locomotive is stopped at a station, there is no exhaust steam from the steam cylinders passing up through the exhaust nozzle C and consequently, the draft upon the bed of fuel is materially lessened.

By my invention, the engineer in shutting off the steam from his operating cylinders by means of the throttle lever A-3, automatically causes the throttle A-3 to engage with the latch O which in turn presses upon the rod M-4, forcing the valve M-3 from its seat M against the action of the spring 5, and the steam pressure, permitting the steam from the boiler to pass directly to the exhaust nozzle O by means of the blast pipe 0-2, thus insuring a proper induced draft which may be regulated by valve M-lO controlling the amount of steam passing from the boiler to the stack. Although for some purposes it is desirable to always have the enigneer automatically throw on the induced draft when he stops his locomotive, I arrange my latch 0 so that the blast valve if desired will not be operated at-the next movement of the throttle lever A 3 to stop the train. This I accomplish by pivoting the latch 0 above the throttle lever so that it can be drawn out into the position shown in dotted lines and designated 0. At no time can the latch 0 be lifted above the other position shown in dotted lines and designated O2, on account of the foot 0-3 engaging with the bracket M-S. By this arrangement when the latch O is withdrawn from operative relation with rod M4, so that it is in the position shown by dotted lines designated O and engaging with the surface M of the throttle lever A-3, the throttle lever can be operated without affecting the rod M-l, which controls the valve M-3. It is to be noted, however, that at the next outward movement of the throttle lever A 3, to start the locomotive, the surface lei (Fig. 2) will pass beneath the end of the latch 0, when the latch will immediately swing upon its pivot M-9 until it contacts with the rod M4-. It will then be in an operative position to be engaged by the surface 13, of the throttle lever A-3, causing the induced draft to be brought into operation when the throttle lever is next moved to stop the locomotive.

Having thus described this invention in connection with several illustrative embodiments thereof, to the details of which I do not desire to be limited, what is claimed as new and what it is desired to secure by Letters Patent is set forth in the appended claims.

1. In a locomotive furnace, a blast pipe, an automatic blast valve adapted to automatically engage a seat to close said valve, a pivoted latch, the stem of said valve lying in the path of the pivoted latch, a throttle lever adapted to automatically actuate the latch. said latch being manually movable out of the path of the throttle lever.

2. In a locomotive furnace throttle lever, automatic means cooperating with the throttle lever to cause an in duced draft in said furnace, said means being adapted to be thrown into an inoperative position.

In a locomotive furnace, an induced draft mechanism including a valve and a pivoted latch adapted to control the same, a throttle lever to automatically operate the latch, said latch being adapted to be removed bodily into an inoperative position in relation to the throttle lever.

4. In a locomotive furnace, means for producing an induced draft including a valve and a movable member adapted to control the same, a throttle lever adapted to actuate the movable member, means for regulating the amount of induced draft, said movable member being adapted to he moved bodily out of operative relation to iho throttle lever.

In a locomotive furnace having an induced drali. mechanism, a blast valvecylimlcr comprising a hollow body portion and a plurality of nipples. an upwardly extended arm. a latch pivoted upon the same and adapted to actuate the valve. a valve and rod mounted within (he cylinder and controlling the passage bciwcon two of ihe nipples, means for supporting the cylindcr in opcraiivc relation to the throttle lever. (he ihroiilc lcvcr adapted to actuate the latch and conncciions from the cylinder to the boiler and stack.

(3. In a locomotive furnace. a plate secured to iho furnace and having a hollow threaded nipple. a hlasl valve cylinder comprisinga hollow body portion having :1 plurality of hollow nipples. one of which cooperates with the hollow nipple upon the plaic to suppori the cylinder in position, a valve and stem controlling the p; hoiwccn two other nipples. the sicm passing" through :luoihcr nipple. a suitable packing for the rod in this nipplc. an up wardly extending" arm. a latch pivoicd lo the samc and normally adapted to contact with the end of tho valvo stem and steam connections from iho boiler to ono of [he nipples and from one of the other nipples io ihc smolustack.

7. In a locomotive furnace. means for producing an in duced draft including a valve :1 pivoted latch to control the same and having :1 foot adapted to limit the movcmcni upon its pivot, and a ihroiile lcvcr adapted to coo wralc with the latch.

S. In a locomotive furnace, a blast valve cylinder con nectcd with ihe boiler and the smoke stack. a valve and rod within the cylinder. :1 throttle lever and means between the rod and throttle lever adapted to normally actuate the valve when the throttle lever is thrown in one position but which is adapted lo be temporarily moved bodily into an inoperative position with relation lo the rod and the throttle lever.

t). In a locomotive furnace, means to produce an induced draft automatically when the locomotive is stopped. a part of said induced draft mechanism being adapicd to be thrown temporarily into an inoperative posilioll with relation to the throttle lever but which automatically rc turns to its operative position when the throttle lever is next moved to start the locomotive.

10. In a locomotive furnace, a throttle lever, auiomaiic means cooperating with the throttle lever lo causc an induced draft from said furnace said means having iwo pd sitions, a normal operative one and an inoperative om. said means when in its inoperative position being adapted to automatically move into its operative position upon the next movement of the lhrolilc lever to start the loci motive.

ROLER'L L. WALKER.

Witnesses JOHN L. BnowN, l\IALCOLi\l Grimm.

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