US1199096A - Boiler-indicator. - Google Patents

Description

G. A. MORE.

BOILER INDICATOR.

APPUCATION FILED MAY 21. 1914.

PatentedSept. 26,1916.

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MM 77M $2 1 7 (a m a M Patented Sept. 26, 1916.

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G. A. MORE.

BOILER INDICATOR. APPLICATION F|LED MAY 27. IQMI LN m m: NuuR's onus cu. Pnomumo. vnsumnom n. c.

G. A. MORE. BOILER INDICATOR.

APPLICATION FILED MAY 27, 1914.

Patented Sept. 26, 1916.

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UNITED STATES PATENT OFFICE.

GEORGE ALAN MORE, OF NORTH SYDNEY,

NEW SOUTH WALES, AUSTRALIA.

BOILERJNDICATOR.

Specification of Letters Patent. Patented Sept 26 1916 Application filed May 27, 1914. Serial No. 841,209.

, of Australia have invented new and useful Improvements in Boiler-Indicators, of which the following is a specification.

This invention relates to that class of apparatus employed for recording variations of level of water in steam boilers in which mechanism actuated by the changes of water levels in the boiler, records such variations automatically and continuously.

Heretofore the mechanical connection between the inclosed or water operated portion of the mechanism and the exteriorly placed mechanism has consisted of a spindle passing through a stufling box and packing. This arrangement is objectionable in so far that friction of a varying amount is periodically encountered by virtue of the wearing of the packing and more especially when the gland is tightened up to obviate leakage. This periodical varying of the friction be tween the packing and the spindle militates against accurate records of varying water levels being obtained and may also lead, by excessive friction, to the sticking and thereby possible breaking by torsion of the packed spindle.

This invention consists in the employment of a spindle whereby the stuffing box with its packing is dispensed with, and whereby friction is reduced to a small but constant quantity.

Referring to the annexed sheets of explanatory drawings Figure 1 is a perspective view of the apparatus. Fig. 2 is a vertical section thereof. Fig. 3 is a horizontal section taken on line 3-3 Fig. 2. Fig. '4 is a vertical section taken on line 44 Fig. 2.

Fig. 5 is a horizontal section taken on line 55 Fig. 4. Fig. 6 is a sectional perspective view of the cam supporting shaft with its extension, and Fig. 7 .is a view of the graduated card chart upon which the record of water levels is automatically recorded.

Corresponding numerals indicate corre sponding parts in the drawings.

10 is the water chamber to which water from the steam boiler whose water levels are to be indicated is admitted through the orifice 11. 7 r 12 .is a float which is actuated by the'rising journaled in the mounting valve 23 suificient freedom to settle itself and falling of the contained water in cham- 7 her 10. p

13 is a steam orifice from which a connection is made between the apparatus and steam space of the boiler.

The float rod 14 is pivotally connected to the free end of the lever 15 which latter is fulcrumed at 16.

The boss 17 of the lever 15is constructed as shown in section in Figs. 2 and 4 in the form of a double cam the upper portion of which is of less diameter than the lower.

The lever axis or fulcrum 16 is trunnioned at one end (Fig. 4) in a screwed steam tight plug 18 and at the other end a portion 19 is trunnioned in a hollow plug 20. The outer end 21 of the fulcrum is formed as a square and engages in horizontal sliding contact with a rectangularly formed chamber constructed in the boss 22 of the steam valve 23. A spiral spring 24 within the rectangular chamber forces the valve 23lup to its face and obviates leakageof steam fromthe interior of the apparatus to the atmosphere. An extension spindle 25 is formed, in one, with the head of the valve 23, and is suitably 26 to permit the accurately in its seating. To the outer end of this spindle is secureda lever 27 at the free end of which is pivotally attached a connecting rod 28 carrying at its outer end a recording pen or pencil 29 suitably held in rubbing contact with a rotatingcard or chart 30 upon which when in operation a line 31 is traced by'such pen or pencil 29.

Clockwork mechanism 32 rotates this card or chart '30 at a predetermined speed and the various markings and indexes thereon determine the precise time at which variations from the datum circle 33 took place and the extent of such variations.

In lieu of the valve 23 a stuffing box or gland may be used in which case one end of the fulcrum 16 is extended outwardly to carry the lever 27 and passes through the said stufling box or gland.

The mechanism for operating the steam 1 whistle alarm shown in Figs; 2 and-4 00m- The upper portion of the vertical spindle 34 i piv tally f attached to the spider frame support 36. This frame 36 slides within the casing 37 which is made adjustable in vertical plane by means of the screwed thread by which it is secured to its seatin This vertical adjustment oi the casing 3'? permits of the range of high and low water marks being increased or decreased within certain limits before the alarm whistle is sounded to announce either high or low water level. Thus by the raising of the casing 87 by partially uns 'rewing it in its seating therange between high and low water marks is increased and alternatelyby screwing it downward the range is decreased automatically.- In Fig.4 the casing 37 isshown in its lowest vertical position. The crosshead 38 of this support carries a conically shaped steam valve 39 which takes its seating on the removable steam passage 40. ll is a screwed gland which secures'the lower flange. of the steam pip in place. Upon the lifting of the valve 39 from its seating 40 live steam is permitted to flow from the interior of the apparatus through the pipe d2 to sound an alarm vwhistle.

Test of the ellicient working of the appa-. ratus is .carried out by alternately closing the water and steam services while keeping the drain cock 46 open duringsuch proceedings. By this means any stoppage or partial stoppage of flow in either the steam or water supply pipes is discovered. 45 is awater gage adapted to visually indi- 'cate the height of water in the water chamber 10 of the apparatus.

In operation water and steam from the boiler to which the app aratus is attached are turned on; water from the boiler coming through the orifice 11 into the water chamber 10 and steam through theorifice 13 into the steam chamber. The water in the chamber 10 and steam in the steam space are under the same orapproximately the samepressure as {that existing in the boiler, consequently the water leve'l in the chamber 10 moves in unison with the water level in the boiler. Upon the water level in the boiler being either raisedor lowered the float 12 is automatically raised or lowered by the :water level of the contained water within the chamber 10 moving in unison with the boiler water level. This action causes-the free end 43 of the lever 15 to be raised or lowered accordinglybythe action of the float rod 12.

Theyopening of the steam whistle valve 39 is eiiected by means of the shoulders 44 of the cam '17 coming into contact with either one or other of the tines or prongs'35 of the spindle 34 when the lever l5'is raised or depressed; The valve39 isclosed when the lever 15 is in normal position. The opening of the valve 39 permits a streamcf live steam to flow from the steam space of the apparatus to sound analarm to indicate a predetermined high and low water level.

The movement of the afloat actuated lever 15 in partially rotating its axis causes the extension spindle 25 to move the lever 27 datum circle to graphically record the extent of ,the range of varying water levels in the boiler. otherwise driven at .a prcdetermlned speed the marking thereon graphically gives the" particulars of time at which these variations took place.

Whatil claim as my invention and desire tosecure by Letters Patent is.

[1. In an apparatus of the class described; the combination of 1a steam-tight casing affording a water column. fora boiler, the casing being provided with a bearing openi g presenting a valve seat at its inner end, aspindle mounted within the casing and including two members mounted to rotate in unison and having axially sliding contact with-eachother, one member being incapable.

of axial movement within its bearings and the. other being capablev of such movement and-extended through the said bearing opening in thecasing; aispherically shaped valve plug .of rigid material provided upon the latter anemberfor frictional contact 'with the scatratithe inner end of {said opening;

the said plug having independent radial movement, through itsmcmberI-being in loose axial contact with the axially immovable member, to provide a .normal seating to afford uniform friction and a steam tight joint at the bearing opening; indicating means-disposed exteriorly of ,the casing and associated operatively with the protruding spindle member; and water-level actuated means provided within'the casing for operating the other spindle member.

In an apparatus oi the class described, the combination of steam-tight casingaffordinga wvater column fora boiler the casing being provided with :a bearing opening presenting valve seat at its inner end .a.

spindle mounted within the casing and including two members mounted .to rotatean unison and having axially sliding contact withieach other, one member being incapable o'f ax'ial movement within its bearings and As the card chart is clockwork or the other being capable of such movement and extended through :thesaid bearing opening in the casing; aispherically shaped valve plug of rigid material provided upon the latter memberfor itrictional contact with.

the seat at the inner end of said opening, the said plug [having independent radial movement, through its member being inloosc. axial contact with the axially immovable lsof member to provide a normal seating to afford uniform friction and a steam tight joint at the bearing opening; indicating means disposed exteriorly of the casing and associated operatively with the protruding spindle member, water level actuated means provided within the casing for operating the other spindle member, and resilient means for pressing the valve plug against its seat until the steam is admitted to the casing from the boiler.

3. In an apparatus of the class described, the combination of a steam-tight casing affording a water column for a boiler, the casing being provided with a bearing opening presenting a valve seat at its inner end, a spindle mounted within the casing and ineluding two members mounted to rotate in unison and having axially sliding contact with each other, one member being incapable of axial movement within its bearings and the other being capable of such movement and extended through the said bearing opening in the casing, a spherically shaped valve plug of rigid material'provided upon the latter member for frictional contact with the seat at the inner end of said opening, the said plug having independent radial movement, through its member being in loose axial contact with the axially immovable member, to provide a normal seating to afford uniform friction and a steam-tight joint at the bearin opening; indicating means disposed exteriorly of the casing and associated operatively with the protruding spindle member; water level actuated means provided within the casing for operating the other spindle member, and a compression spring associated with the spindle and tending to separate the members of the same to press the valve against its seat, until the steam is admitted to the casing from the boiler.

a. In an apparatus of the class described, the combination of a steam-tight casing affording a water column for a boiler, the easing being provided with a bearing opening presenting a valve seat at its inner end. a spindle mounted within the casing and ineluding two members mounted to rotate in unison and having axially sliding contact with each other, one member being incapable of axial movement within its bearings and the other being capable of such movement and extended through the said bearing opening in the casing; spherically shaped valve plug of rigid material provided upon the latter member for frictional contact with the seat at the inner end of said opening, the said plug having independent radial move ment, through its member being in loose axial contact with the axially immovable member, to provide a normal seating to afford uniform friction and a stean1tight joint at the bearing opening; indicating ,fording means disposed exteriorly of the casing and associated operatively with the protruding spindle member, and water level actuated means provided within the casing for operating the other spindle member, one of said spindle members being provided in its inner end with a non-circular recess and the other member being provided with a reduced non-circular extension upon its inner. end for axial sliding engagement within the recess of the first member.

5. In an apparatus of the class described, the combination of a steam-tight casing afa water column for a boiler, the casing being provided with a bearing opening presenting a valve seat at its inner end, a spindle mounted within the casing and including two members mounted to rotate in unison and having axially sliding contact with each other, one member being incapable of axial movement and the other being capable of such movement and extended through the saidbearing opening in the casing; a spherically shaped valve plug of rigid material provided upon the latter member for frictional contact with the seat at the inner end of said opening, the said plug having independent radial movement through its member being in loose axial contact with the axially immovable member, to provide a normal seating to afford uniform friction and a steam-tight joint at the bearing opening; indicating means disposed exterior-1y of the casing and associated operatively with the protruding spindle member; water level actuated means provided within the casing for operating the other spindle member, one of said spindle members being provided in its inner end with a non-circular recess and the other member being provided with a reduced non-circular extension upon its inner end for axial sliding engagement within the recess of the first member, and resilient means tending to separate the said spindle members to maintain the said valve plug seated until the steam is admitted to the easing from the boiler.

6. In an apparatus of the class described, the combination of a steam-tight casing affording a water column for a boiler, the easing being provided with a bearing opening presenting a "alve seat at its inner end, a spindle mounted within the casing and including two members mounted to rotate in unison and having axially sliding contact with each other, one member being incapable of axial movement within its bearings and the other being capable of such move ment and extended through the said bearing opening in the casing; a spherically shaped valve plug of rigid material ,pro-c vided upon the latter member for frictional contact with the seat at the inner end of said opening, the said plug having inde- )endent radial movement throu h its meml is ber being in loose axial contact With the axially immovable member, to provide a normal seating to afford uniform friction and a steam-tight joint at the bearing opening; indicating means disposed exteriorly of the casing and associated operatively with the protruding spindle member; Water level aotuated means provided Within the casing for operating the other spindle member, one of said spindle members being provided in its inner end with a non-circular recess and the other member being provided With a reduced non-circular extension upon its inner end for axial sliding engagement Within the recess of the first member, and a compression spring mounted Within the said recess in interposed relation to both spindle members and tending normally to separate the members of the same until the steam is admitted to the casing from the boiler.

In testimony whereof I have signed my name to this specification in the presence v of two subscribing Witnesses.

GEORGE ALAN MORE.

Vitnesses G. G. HEIBURN, A. E. GooDWIN.

Copies of this patent may be obtained for five 'cents each, by addressing the Commissioner of Patents,

' Washington, D. C.

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