US1130445A - Gage. - Google Patents

Description

G. J. TAGLIABUB.

GAGE. APPLICATION FILED JULY 20,.1909.

Patented Mar.2,1915.

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CHARLES J. TAGLLABUE, OF NEW YORK, N. Y.

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To all whom it may concern:

Be it known that 1, CHARLES J. TAGLIA: BUE, a citizen of the United States, and resident of the borough of Brooklyn, county of Kings, city and btate of New York, have invented certain new and useful Improvements in Gages, of which the following is a specification.

My invention relates to gages such as vacuum gages and pressure gages, and has for its object to provide such instruments with an accurate and easily operated means for adjusting the level of the mercury to a given point and further to provide the mercury chamber at a convenient location with a .sight glass so that the level of the mercury therein may at all times be observed.

Other objects of my invention will appear from the description hereinafter and the features of novelty Wlll be pointed out in the appended claims.

Reference is to be had to the accompanying drawing in which Figure 1 is a front elevation of my improv d gage; Fig. 2 is an enlarged cross section of the mercury chamber and parts on the line-2-2 of Fig. 3; Fig. 3 is a horizontal section thereof on the line 3-3 of- Fig. 2 and Fig. 4: is an enlarged detail front view of a portion of the mercury chamber showing the sight glass.

In the drawings 1 which may be secured in the desired position in any convenient way as by screws and on which is located a bracket 2. A stud or projection 3 secured to or forming part of the mercury chamber 4: extends into said bracket 2 and serves to secure the mercury chamber in proper position.

5 isthe division or scale plate carried by and projecting upwardly from the mercury chamber 4: and 6 is the glass tube located adjacent to said division plate and having its one end extending-into a well 7 connected with the interior of the mercury chamher 4: by means of a passage 8. A packing 9 surrounds the tube 6 and is maintained in position by means of a screw-threaded collar 10. A screw-threaded nipple 11 screws into the upper wall of the mercury chamber and is provided with an exteriorly screwthreaded portion 12 arranged to receive a coupling 18 for securing the one end of a pipe 14 in position. The said pipe 14: extends from said nipple 11 to a strainer 15 of any suitable description which strainer Specification of Letters Patent.

is the supporting plate .to receive theprotecting cap Patented Mar. 2, 1915.

Application filed July 20, 1909. Serial No. 508,624.

is connected to a pipe 16 through which the pressure is forced or through which the Vacuum 1S drawn. A branch pipe 1'? controlled by a cook 18 is connected with a moisture trap 19, provided with a drain cook 20 located at its lower portion. The division or scale plate may be divided on one side for pressure as indicated at 5" in Fig. 2 and on the other side for vacuum readings as at 5 in Fig. 2. In'the case of pressure ,readings the zero mark is at the bottom and'the mercury column is forced up in the tube 6 while if the instrument is used as a vacuum gage the instrument is read from the top down and the readings usually begin at 18 and end at 30 which point corresponds with the zeropoint of a pressure gage. In this latter case the mercury is normally at top and moves down as the vacuum is drawn.

A screw plug 21 having longitudinal passages 22 engages the interior of the nipple 11 and extends into the mercury chamber 4:- The said plug 21 is formed with a pointed end 23 forming a valve and arranged to cooperate with a valve seat 2 1 at the end of the passage 8 to govern the flow of the mercury from the mercury chamber to said passage 8. The mercury chamber is further provided with a screw threaded stopper or plug 25 arranged to screw into an opening in the upper wall having a screw threaded portion 26 adapted 27. The stopper 25 is formed with a central internally screw-threaded bore for adjustably accommodating the screw-threaded shank 28 of the plunger 29. In its one front wall the mercury chamber is provided with an opening which is closed by means of a sight glass EEO-secured in position through the medium of a plate 31 having an opening 32. A washer 33 is located between the glass 30 and the wall of the mercury chamber 1 to secure a .perfect or tight joint. 34; is an adjustable indicator'having a screw-threaded engagement with the upper wall of the mercury chamber and further having a pointed end which extends into the mercury chamlocated in the one vertical end face of said chamber opposite the zero point in the division plate. The openings for the nipple 11 and the plug 25 are preferably located at points opposite to each other.

In operation if the device is used on a pressure gage, steam, air, etc., the pressure of which is to be measured passes from the pipe 16 through the strainer 15 and through the pipe 1-1- to the mercury chamber 4 into engagement with the mercury therein, which is thus forced through the passage 8, through the well 7 and up into the tube 6 to a greater or less distance according to the varying pressure exerted-by the fluid to be measured. If the indicating instrument is a vacuum gage the vacuum is drawn through the tube 16 and the column of mercury inthe tube 6 is caused to fall in the usual way.

Owing to variations in temperature, leakages and other causes, the normal level of the mercury is liable to change so that unless this change in level is corrected, it is impossible to obtain a correct reading. To overcome this ditliculty I provide the plunger 29, which may be raised or lowered as desired by simply turning the shank 28 with the aid of a suitable instrument, as for in.- ,stance a screw driver, it being understood that the protecting cap 27 is first removed to make this possible. If the level of the mercury is below zero or the 30 mark, the plunger 29 is lowered thus raising the level of the mercury until it reaches the point of the indicator 3% which corresponds to the zero mark and vice versa if the normal level of the mercury is above Zero. To make it easy to properly and accurately adjust this level, I provide the mercury chamber in its one vertical end wall with the small sight glass 30 through which the point of the indicator 8d may be seen and through which all and'any changes in the level of the mercury may be easily noted. By having the relatively small sight glass it is easy to replace same if by accident the glass should become broken or otherwise rendered useless. All

that isv necessary to effect such change is to remove the plate 31, take out the glass 30 and replace it with a new glass and then again secure the plate in position. The strainer 15 serves to prevent sediment of any kind which maybe in the fluid to be measured from'reaching the mercury and mercury to the tube 6. This plug 21 may be fully screwed down until the end 23 is seated in the seat 24: so as to completely close the passage 8. In this position the upper ends of the passages 22 are within the screw-threaded portion of the nipple 11 so that communication between the mercury chamber and the interior of :the nipple is out off. Vith the parts in this position it is impossible for the mercuryto spill and the device may thus be readily'and safely shipped. The indicator for the level of the mercury is readily adjustable to meet variations in different division plates.

Various modifications may be made with out departing from the spirit of my invention as defined in the claims.

I claim:

1. In a gage, a substantially opaque mercury chamber having curved vertical Walls and substantially straight end walls connecting said curved walls, a scale plate extending upwardly from said mercury chamber between the end walls thereof, a mercury tube connected with said mercury chamber and located adjacent to said scale plate, a sight glass in the one end wall of said mercury chamber, an indicator in said mercury chamber visible through said sight glass, and means for adjusting the level of the mercury in said mercury chamber relatively to said indicator.

2. In a gage, a substantially opaque mercury chamber substantially semi-circular in shape, a tube extending upwardly there-- from, and connected therewith, an adjustable valve for regulating theflow of mercury from said chamber to said tube, an adjustable plunger in said chamber for varying the level of the mercury therein and a sight glass located in said chamber so as to make the operative end of said valve and the variations in the level of the mercury visible therethrough.

3. In a gage, a mercury chamber, a tube connected therewith, an inlet nipple movably mounted on said chamber and communicating therewith and an adjustable channeled valve movably secured in said nipple and arranged to permit or prevent the flow of mercury from said chamber to said tube and by its channel to control the communication between saidnipple and said mercury chamber.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

CHARLES J. TAGLIABUE.

Witnesses Jenn A. KEHLENBECK, G. V. RAsMUssEN.

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