US1388624A - Safety scaleproof automatic gage-cock - Google Patents

Description

L. WHIPPLE AND Z. ONEAL.

` SAFETY scALEPRooF AUTOMATIC GAGE cocK.

APPLICATION FILED NGVz I6, 1920.

A TTUHNE Y 8 L. WHIPPLE AND Z. ONEAL. l SAFETY SCALEP'ROOF AUTOMATIC GAGE CCK.

APPLICATION FILEUNOV. I6, 1920.

Patented Aug. 23, 1921.

2 SHEETS-SHEET 2.

/N VENTO/1` o, WH/Pfpe) O NEA L) WITNESSES A TTUHIVE YS UNITED TATES LESSIE WHIPPLE AND ZACK ONEAL, 0F SHREVEPORT, LOUISIANA.

SAFETY SCALEPROOF AUTOMATIC GAGE-COCK.

Spooiiication of Letters Patent.

Patented Aug. 23, 1921.

Application filed November 16, 1920. Serial No. 424,507.

To all whom it may concern Be it known that we, Lnssin VVHrrrLn and Zhen. ONEM.y citizens of the United States, and residents oi' Shreveport, in the parish of Caddo and State of Louisiana, have invented certain new and useful Improvements in Safety Scaleproof Automatic Gage-Cocks, of which the following is a specification.

Our invention relates to improvements in gage cocks and has special reference to that class of gage cocks using multiple valves and which are adapted to be used in connection with locomotive boilers.

An object oi' the invention is to provide an improved separable gage cock of such construction as to admit of the main or outlet valve and stem being removed for regrind ing and other repairs without removing the entire assembly from the boiler, and at the same time automatically closing the steam or water outlet from the boiler, and thus obviating the necessity ol withdrawing the stealn :from the boiler.

Another object is to prevent the gage cock from becoming inoperative through deposit or accumulation o'l lime or scale on the valve sea-t.

Nith these and other objects in view as will appear as the description proceeds, the invention consists in certain novel features of construction, arrangement and combination ot parts as will be hereinafter fully described and pointed out in the claims1 reference being had to the accompanying drawv4 ing in which- Figure 1 is a side elevation showing the gage cock applied to a boiler. j

Fig. 2 is a vertical longitudinal section of the same.

Fig. 3 is a verticalv transverse section taken on line 3-3 of Fig. 2.

Fig. 4 is a similar view taken on line evil of Fig. 2.

Fig. 5 is a vertical transverse section taken on line 5-5 of Fig. 2. j

Fig. 6 is a perspective view of the automatically operating valve removed `from the body portion.

Fig. 7 is a perspective view of the automatic valve cage, or cover, shown separated from the body portion.

Fig. 8 is a perspective View of the main v alve and stem removed from the body portion.

Similar reference characters refer to si1nilar parts throughout the several views.

In a practical embodiment of our invention we employ a gage cock body portion 10 which has a globular or spherical outlet chamber 11 from which leads an outlet pipe 12. The outer end beyond the spherical chamber constitutes a neck 13 which is eX ternally and internally threaded and into the threaded bore 14 oi the neck is introduced the main valve 15 the stern of which is threaded as at 16 to mate with its internal thread; this stein is also reduced and projects beyond the body portion as a turning stall 17 to the end of which is rigidly attached a hand wheel 18 as usual in this type oit device.

The main valve 15 is ol the conefrustum type and has projecting from its inner end an axial pin 19 the purpose of which will later appear. After the main valve has been introduced into the neck until the threaded portion is within the outer end of the threaded neck apacking ring or gasket 2O is slipped on the handle stem against the annular shoulder formed b y the junction olf the reduced stem and the threaded portion; a bonnet or gland cup 21 is then screwed on the externally threaded neck and compresses the packing gasket and holds tightly inplace and renders the gage cock leak prooiI at this point.

The rear wall oit Vthe spherical chamber has a conerustum valve seat 22 with which the conefrustum valve mates and the valve is tightly seated in the valve seat by screwing in the valve stem by means of the hand whee The bore 23 of the gage cock then 'extends axially rearwardly or inwardly through the body portion and then Hares or expands into another conefrustum valve seat 24 at the extreme inner end of body or that portion that is to lie within the boiler.

The body is secured in the head of the boiler 25 by a tapered threaded portion 26 screwed into a similarly tapered and threaded opening in the head of the boiler.

The inner end of the body beyond the aforesaid tapering' threaded portion is reduced Vas at 27 and externally threaded and upon this threaded end is screwed a cage 28 the end wall of which has an axial .opening 29 and a circular series of similar 32 is a plunger 34, which is substantially .aol

triangular in cross section and extends into the central bore of the body and through the same tof a pointl adjacent the main valve seat, andV its free` end is provided with a cylindrical depression or socket 35 designed to receive the free end of pin 19 which extends beyond the main or outletl valve.

When in use the tapering threaded portion is screwed in the boiler liead,the auxiliaryv orcage valve being held to its seat by coiled spring 33. The gage cock now being secured to Vthe boiler, by screwing in the valve stem 16 the pin 19 will enter the recessor socket 35 in the end of plunger 34 and forcing the same will unseat the valve V32A against the force of the spring 33 and the pressure of Water and steam Within the boiler,v and permit the passage of water to the outlet 12.v Vhen the main valve stem is screwed entirely into the body the main valve`15 becomes seated and the auxiliary valve is full open.

yIf it is now desired to regrind the valve seat or the main valve, or to make any other repairs to the main valve chamber, the bonv net 21 is unscrewed from the neck. of the body Vand the main valve stem unscrewed fromthe body of the cock, whereupon the auxiliaryor cagevalve will be automatically seated, the coiled spring aiding the pressure in the boiler to accomplish this result, and thus preventing ,the danger of scalding while the repairs are made to main valve end o the device.

The plunger 34 being substantially triangular and having a loose fit in the bore, spaces are left surrounding and as it may turn on its, axis either by the force of the water or by a turning movement of the main valve stem through the pin 19, accumulation of scale will be prevented.

1. A gage cock comprising a body portion having a spherical main valve chamber, and a transverse outlet therefrom and an internally and externally threaded neck beyond said chamber, said chamber having an axial conefrustum valve seat in its wall opposite the neck, a valve stem threaded into said neck, aconefrustum valve on said stem and a pin projecting from said stem beyond said valve, a packed bonnet surroundi said stem and screwed on said neck, the body portion having a tapering threaded portion fitted into the boiler head and a reduced threadedend beyond said tapering threaded portion, a cage screwed on said reduced end and having a central guide opening through its end wall and a circular series of openings surrounding said guide opening, an auxiliary conefrustrum safety valve, within said cage, and a stem projecting from the larger end of said valve projecting through said guide opening, a coiled spring surroundlng said stem between the valves and the end Wall of the cage, said valve adapted to be'seatedy on a conefrustum valve seat at the end of the bore of the body portion, a

substantially triangular plunger projecting into said bore of the body and extending to adjacent the main valve seat, the free end of said plunger having a recess or socket adapted to receive the end of said pin projecting beyond the endA of the main valve stem.

2. In a gage cock, a body portion having a spherical main valve chamber adjacent one end and a manually operated, main valve screwed into such end, said body portion adapted to be screwed into a boiler head and having a central bore, a cage screwed onto the otlier end of the body, said cage having a central opening in its end wall, an auxiliary valve carrying a plunger extending into said borefand loosely mounted in. said cage and adapted to automatically control the inner end of the bore of the body, said plunger cooperating with the main valve, a stem projecting through said central opening in the end wall of the cage, said end wall having a series of openings surrounding said central guide opening.

LESSIE WHIPPLE. ZACK ONEAL.

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