Sampling Device (Patent No: 604466)

Inventor: Barber Machinery Limited

Location: Edmonton

Comments: N/A

Description: The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A sampling device for a liquid supply line comprising a body having a constantly open supply passage therein, said passage having an inlet and an outlet, a tube connected to each of said inlet and said outlet and projecting outwardly from said body, for disposition in said line, said body having a cylindrical recess therein communicating at one end thereof with said passage, a sample receiving chamber, a sample receiving passage leading from said recess to said chamber, and a sample discharge passage leading from said recess, a valve spool member reciprocatingly mounted in said recess and having a first position placing said supply passage in communication with said sample receiving passage and said chamber while closing said discharge passage and a second position interrupting communication between said supply passage and said sample receiving passage and placing said sample receiving passage in communication with said discharge passage means for reciprocating said valve spool member to place said member in said first and second positions, and a liquid ejection piston movable into said chamber in response to placing of said member in said second position.

2. A sampling device as defined in claim 1, said reciprocating means comprising a solenoid engaging said valve member to move said valve member into said first position and a spring engaging said valve member to move said valve member into said second position.

3. A sampling device as defined in claim 1, said last mentioned means comprising a second solenoid having a plunger engaging said piston and energizable to perform an ejection stroke of said piston, and a spring for effecting a return stroke of said piston, said second solenoid being energizable in response to de-energization of said first solenoid.

4. A sampling device as defined in claim 1, said last mentioned means comprising a spring on said piston and urging it in an ejection stroke direction, said spring being depressable in response to pressure of liquid in said metering chamber in said first valve position and being capable of exerting an ejection stroke on said piston on release of liquid pressure in said metering chamber in response to interruption of communication between said metering chamber and supply passage.

5. A sampling device as defined in claim 1, including means for varying the ejection stroke of said piston thereby to vary the size of liquid sample ejected from said metering chamber.

6. A sampling device as defined in claim 1, including a flexib1e vapor proof sample receiving container, and a conduit leading from said discharge passage to said container.

7. A sampling device as defined in claim 1, said supply passage being U-shaped and having a pair of substantially parallel side sections and a section connecting one of the pair of ends of said side sections, said valve spool member extending across said connecting section, said connecting section having an annular portion extending around said valve spool member.

8. A sampling device as defined in claim 1, including a tube connected to each of said side sections and extending from said connection for disposition within said line, one of said tubes constituting an inlet for liquid from said line into said supply passage and the other of said tubes constituting an outlet for liquid from said supply passage into said line.

Alex. E. MacRae & Co.,
56 Sparks Street,
Ottawa, Ontario, Canada,
Patent Agents for Applicant.