US1050927A - Gage-glass protector. - Google Patents

Description

P. G. DUNBAR.

GAGE GLASS PROTECTOR.

APPLICATION FILED wuss, 1912.

1,050,921- Patented Jan.21,1913.

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FRANK G. DUNBAR, OF CHICAGO, ILLINOIS, ASSIGNOR T0 SARGENT COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

' GAGE-GLASS PROTECTOR.

Specification of Letters Patent.

PatentedJan. 21, 1913.

Application filed June 3, 1912. Serial No. 701,313.

tion.

My present invention relates to protective means and, more particularly, to protectors adapted for use in connection with locomo m tive gage-glasses and'aims to afford protection to -the,. "gage-glass from external -under pressure from the protector, or, otherwise the glass-shield which permits observa- -tion of the gage-glass will bebroken by the forces and; also,- to shield the engineer and fire'n'ianfroiii the flying fragments of glass and the escaping hot water and steam in the event of accidental breakage of the gage-glass when steam pressure is in the boiler. In order to effectually shield the engineer and fireman against flying fragments of .brokengage-glasses it is essential that the protector shall surround, not only the frontand sides of the gage-glass but, also, the ends-and back, for if the ends be not inclosed the flying glass particles will escape at these points and endanger the eyes of the engineer and fireman and, if the back he not inclosed the glass fragments will strike the end of the boiler and be deflected and scattered throughout the cab.

While the complete inclosure of the gagelass to prevent broken particles of glass Jrom escaping is of primeimportance, an-

other factor must be considered in the construction of a protector, viz: that the steam u the boiler is under a pressure appi:oxi-' mating two hundred pounds and, when the gage-glass breaks, some provision must be made for the escape of the steam and water enormous pressure from within, thereby increasing rather than obviating the dangers froin flying particles of broken glass.

. My present invention has for one of its objects the provision of a gage-glass protector which will effectually prevent flying particles of a broken gage-glass from scattering throughout the cab and, at the same time, will permit the escape of steam and water from the protector so that the glass .shield will not be broken.

Another object is to provide novel and improved means for holding the shield in position in such a way that it will not be readily fractured by pressure from within and will also be rigidly held in position thereby obviating the dangers of fracture by jiggling and jarring about. 7

The invention and its attendant advantages will be understood from the followingdescription when consideredin connection with the accompanying drawings illustrating one preferred embodiment thereof.

Referring to the drawings l igure 1 is a longitudinal sectional view of a protector embodying my invention; Fig. 2 is a transverse sectional view on the line 2--2 of Fig.

1; and Fig. 3 is a similar view on line 3-3 of Fig. 1.

port for the-gage glass to prevent breakage v of the same and is also constructedfto hold ,a gage-glass shield around the gage-glassv for protective purposes. The gage-glass 7. of usual/ construction and any desired length, has. its lower end connected with the gage cock 5 in the usual manner.

The holder, designated generally by ref? er ence character 8, is, preferably, for cheap- -ness in manufacture, cast integrally, in one piece. of iron, aluminum, or other material, alum num being well adapted for the purpose on account of its lightness.

y The rear wall of the holder is curved outwardly at 9 preferably throughout its length to form a longitudinally extending passageway 11, opened at its rear side to permit the escape of steam and water under pressure. Between the curved portions!) and preferably formed integrally, with the holder there is disposed a curved battle-plate 12 reinforced at the sides intermediate its ends by short webs 13. At the upper and lower ends the holder is equipped with forwardly projecting flanges 14 and 15, respectively, and flange 14 is projected rearwardly' as inand the side flanges are still further dicated at 16 to close the top of the passageway 11 while the lower end is left open to permit the particles of a broken gagegl'ass to drop upon the deck of the cab. At the sides of the body are formed forwardly projecting flanges 17 and 18, spaced to receive between them the rearwardly projecting edges of a curved wire glass-shield 19 of well known construction. Adjacent their ends where the side flanges l7 and 18,con-- nect with the top and bottom of flanges 14 separated throughout a portion of their length indicated by 21 and 22 to form recesses on each side of the shield adjacent its ends for the reception of the ends of curved holding clips 23 and 2t. Theseclips are adapted to fit over the ends of the shield and are provided, respectively, with flanges 25 and 26 which embrace the outer face of the shield at its ends to hold it in position. The clips are held together to clamp the ends of the shield therebetween by a-pair of rods 27 and 28 threaded at each end into the clips and, for the purpose of preventing the shield from jarring about within the clips, a suitable packing or composition 29 may be interposed between the clips and the end of the shield, if desired.

The end flanges 1-1 and 15 are equipped with threaded studs 31 and 32, respectively, adapted for connection with the flexible tube 33 and the gage cock 5 by means of any suitable connecting nuts. For the purpose of holding the shield and clips in position, the flanges 14 and 15 and, also, the clips 23 and 24- are provided with alined perforations through which a retaining rod 34 is inserted. It will be obvious that, by employing the clips which embrace the shield at its ends and then securing the clips to the body of the holder, the shield is securely support-ed against lateral displacement entirely around its periphery at. both the top and bottom and is, therefore, much less liable to fracture under internal pressure than if the clips were omitted and it were held in place merely by the rod 34. The inner edges of the shield are also held against outward movement by the lateral flanges 17 and 18.

When the gage-glass 7 becomes accidentally broken the flying particles of glass will be prevented from scattering sidewise and forwardly by the shield 19 and their rearward escape will be obstructed by the baflie-plate 12. The steam and water will escape around the baffle-plate and relieve the shield of internal pressure while the glass particles will be obstructed by the plate and deflected by the curved walls 9 so that their projectile force will be greatly diminished. A screen 35 is secured over the rear opening betweenthe curved walls 9 to prevent such glass particles as escape around the battle plate from being discharged against the from the foregoing without further description and, it will be obvious, that the details of construction may be varied within considerable limits without departure from the scope of the invention.

I claim:

1. A gage-glass protector comprising an elongated body provided with outstanding flanges, the rear wall of said body being open to permitthe escape of steam and water under pressure, iinperforate means for obstructing the escape of glass particles through the opening in the back of the body, and a transparent imperforate shield across the front of the body and between the flanges.

2. A gage-glass protector comprising an elongated body and a transparent shield mounted thereon, the rear wall of said body being open to permit the escape of steam and water under pressure and having a 1011- body being extended outwardly and provided with an elongated opening to permit the escape of steam and water under pres sure, and a curved baflie-plate disposed in front of said opening to receive the impact of flying particles of glass and obstruct their escape.

4. A gage-glass protector comprising a body, a transparent gage-glass shield mounted on its forward face, the rear wall of said body being extended outwardly and provided with an elongated opening to permit the escape of steam and water under pressure, a curved baflle-plate disposed in front of said opening to receive the impact of flying particles of glass and obstruct their escape, and a screen positioned over said openmg.

5.1%. gage-glass protector comprising an integral body provided atits ends with flangesapertured to receive the ends of a gage-glass, the rear wall of the body being extended outwardly and provided with a centrally disposed longitudinally extending opening, and a baflleplate formed integrally with the body ahd disposed between the nornal position of the gage-glass and said opening to obstruct the escape of broken glass particles.-

6. In a gage-glass protector, the combinatiofi=of a body provided with'top and bottom forwardly projecting end flanges, a glass shield disposed between said flanges, a pair of clips embracing the shield adjacent its ends, and retaining means engaging said flanges and said clips whereby the shield is held at the top and bottom against displacement.

'Z. In a gage-glass protector, the combination of an inflexible body adapted for attachment at its ends to connections with a boiler, the rear wall of said body being ex: tended outwardly and a bafli-plate being positioned in front of said feXtended portion, a curved glass shield disposed around the gage-glass in front of the rear wall of the body, a pair of clips embracing the shield near its ends, and retaining means connecting the cli ps with the body whereby to hold the shield in position.

8. In a gage-glass protector, the combination of an inflexible body provided with end flanges adapted forattachment to connections with a boiler, and longitudinal side flanges, a curved shield positioned to be embraced by said end and side flanges, a pair of curved holding clips embracing the shield adjacent its ends and disposed between the 'steam and water under pressure, a baflieplate formed integrally with the body being disposed in front of said opening to obstruct the escape of broken particles of a gage-glass, a curved shield disposed between said peripheral flanges, a pair of curved clips embracing the ends of the shield, and means for connecting the clips with the body whereby to retain the shield in position.

10. A gage-glass protector comprising an inflexible body adapted for attachment at its ends to connections with a boiler and having an opening in its rear wall, a screen positioned over said opening a baffle-plate dispoesd, in front of said opening to intercept flying particles of glass, and a shield carried by the body.

FRANK G. DUNBAR.

Witnesses IRA J. WILSON, M. A. Knmm.

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