Manometer

Claim 2

A manometer for measuring liquid pressure comprising: a. a channel having an opening therein through which said liquid enters and fills at least part of said channel; b. attachment means for connecting said channel through said opening to liquid under pressure, said attachment means including a conduit communicating with said opening intermediate the ends of the conduit and providing a path of flow for said liquid into said channel wherein the pressure of said liquid will be indicated by the amount of travel of the liquid in said channel; c. means adjacent one end of the conduit for introducing the liquid into the conduit; and d. openable closure means adjacent the other end of the conduit for selectively closing the other end of the conduit or opening the other end of the conduit, said closure means being constructed and arranged to permit drainage of liquid from the manometer through the closure means when in conduit opening condition.

Claim 3

A manometer for measuring liquid pressure comprising: a. a chamber and a channel interconnected with each other through a passageway to provide for displacement of gas in the channel to the chamber by liquid entering said channel under pressure, said channel having an opening therein through which said liquid enters said channel, said opening being spaced from said passageway to permit said fluid to enter anD fill at least a major portion of said channel without entering said passageway; b. attachment means for connecting said channel through said opening to liquid under pressure, said attachment means including a conduit communicating with said opening intermediate the ends of the conduit and providing a path of flow for said liquid into said channel whereby liquid entering said channel displaces gas therefrom into said chamber through said passageway and compresses the gas in said channel, passageway and chamber, the amount of travel of said liquid in said channel indicating the pressure of the liquid; c. means adjacent one end of the conduit for introducing the liquid into the conduit; and d. openable closure means adjacent the other end of the conduit for selectively closing the other end of the conduit or opening the other end of the conduit, said closure means being constructed and arranged to permit drainage of liquid from the manometer through the closure means when in conduit opening condition.

Claim 4

A manometer for measuring liquid pressure comprising: a. a chamber and a channel interconnected with each other through a passageway to provide for displacement of gas in the channel to the chamber by liquid entering said channel under pressure, said channel having an opening therein through which said liquid enters said channel, said opening being spaced from said passageway to permit said fluid to enter anD fill at least a major portion of said channel without entering said passageway; b. attachment means for connecting said channel through said opening to liquid under pressure, said attachment means including a conduit communicating with said opening intermediate the ends of the conduit and providing a path of flow for said liquid into said channel whereby liquid entering said channel displaces gas therefrom into said chamber through said passageway and compresses the gas in said channel, passageway and chamber, the amount of travel of said liquid in said channel indicating the pressure of the liquid; c. means adjacent one end of the conduit for introducing the liquid into the conduit; and d. openable closure means adjacent the other end of the conduit for selectively closing the other end of the conduit or opening the other end of the conduit, said closure means being constructed and arranged to permit drainage of liquid from the manometer through the closure means when in conduit opening condition.

Claim 5

The manometer of claim 2 wherein said means for introducing said liquid comprises a needle.

Claim 6

The manometer of claim 2 wherein said construction and arrangement of the closure means is provided by a slit therein, said slit normally having the opposed edges thereof abutting so as to prevent leakage of fluid but which forms a drainage opening for liquid from said manometer upon distortion of said closure means to separate the abutting opposite edges of said slit.

Claim 7

The manometer of claim 4 wherein the chamber and the channel are positioned beside each other substantially parallel along their longitudinal axes.

Claim 8

The manometer of claim 4 wherein said chamber surrounds at least that part of the channel which connects to said passageway, said chamber being closed above said channel and below said passageway such that said chamber is gas-tight except for said passageway into the channel.

Claim 9

The manometer of claim 6 wherein said chamber is closed below said passageway against the wall of said channel.

Claim 10

The manometer of claim 4 wherein the wall of the chamber is partly in common with the wall of the channel.

Claim 11

The manometer of claim 2 wherein said passageway is an opening in said channel, said opening connecting the channel to the chamber.

Claim 12

The manometer of claim 9 wherein said chamber surrounds at least that part of the channel which includes said opening connecting the channel to the chamber, said chamber being closed above said channel and below said opening such that said chamber is gas-tight except for said opening in the channel.

Claim 13

The manometer of claim 10 wherein said chamber is closed below said opening against the wall of said channel.

Claim 14

The manometer of claim 2 wherein the chamber and the channel are positioned beside each other substantially parallel along their longitudinal axes.

Claim 15

The manometer of claim 12 wherein the wall of the chamber is partly in common with the wall of the channel.

Claim 16

A manometer for measuring liquid pressure comprising: a. a chamber and a channel interconnected with each other through a passageway to provide for displacement of gas in the channel to the chamber by liquid entering said channel under pressure, said channel having an opening therein through which said liquid enters said channel, said opening being spaced from said passageway to permit said fluid to enter and fill at least a major portion of said channel without entering said passageway, b. attachment means for connecting said channel through said opening to liquid under pressure, said attachment means including a conduit communicating with said opening intermediate the ends of the conduit and providing a path of flow for said liquid into said channel whereby liquid entering said channel displaces gas therefrom into said chamber through said passageway and compresses the gas in said channel passageway and chamber, the amount of travel of said liquid in said channel indicating the pressure of the liquid, c. means adjacent one end of the conduit for introducing the liquid into the conduit, d. openable closure means adjacent the other end of the conduit for selectively closing the other end of the conduit or opening the other end of the conduit, said closure means being constructed and arranged to permit drainage of liquid from the manometer through the closure means when in conduit opening condition, and e. said chamber surrounding at least said passageway and part of the channel, said chamber being closed above said channel and below said passageway such that said chamber is gas-tight except for said passageway connecting to the channel.

Claim 17

A manometer for measuring liquid pressure comprising: a. a chamber and a channel interconnected with each other through a passageway to provide for displacement of gas in the channel to the chamber by liquid entering said channel under pressure, said channel having an opening therein through which said liquid enters said channel, said opening being spaced from said passageway to permit said fluid to enter and fill at least a major portion of said channel without entering said passageway, b. attachment means for connecting said channel through said opening to liquid under pressure, said attachment means including a conduit communicating with said opening intermediate the ends of the conduit and providing a path of flow for said liquid into said channel whereby liquid entering said channel displaces gas therefrom into said chamber through said passageway and compresses the gas in said channel passageway and chamber, the amount of travel of said liquid in said channel indicating the pressure of the liquid, c. means adjacent one end of the conduit for introducing the liquid into the conduit, d. openable closure means adjacent the other end of the conduit for selectively closing the other end of the conduit or opening the other end of the conduit, said closure means being constructed and arranged to permit drainage of liquid from the manometer through the closure means when in conduit opening condition, and e. said chamber surrounding at least said passageway and part of the channel, said chamber being closed above said channel and below said passageway such that said chamber is gas-tight except for said passageway connecting to the channel.

Claim 18

The manometer of claim 14 wherein said chamber is closed against the wall of said channel below said passageway.