GB1441324A - Specific gravity controlling means - Google Patents

Specific gravity controlling means

Info

Publication number
GB1441324A
GB1441324A GB4223073A GB4223073A GB1441324A GB 1441324 A GB1441324 A GB 1441324A GB 4223073 A GB4223073 A GB 4223073A GB 4223073 A GB4223073 A GB 4223073A GB 1441324 A GB1441324 A GB 1441324A
Authority
GB
United Kingdom
Prior art keywords
arm
specific gravity
etching
sensor
pumping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4223073A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philip A Hunt Chemical Corp
Original Assignee
Philip A Hunt Chemical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philip A Hunt Chemical Corp filed Critical Philip A Hunt Chemical Corp
Publication of GB1441324A publication Critical patent/GB1441324A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/10—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials
    • G01N9/12—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers
    • G01N9/18—Special adaptations for indicating, recording, or control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/10—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials
    • G01N9/12—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers
    • G01N9/16—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers the body being pivoted

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemically Coating (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

1441324 Etching; etching apparatus PHILIP A HUNT CHEMICAL CORP 7 Sept 1973 [7 Sept 1972] 42230/73 Heading B6J [Also in Division G1] An etching bath 10 for etching metallic copper using aqueous ammonium chloride/ammonium hydroxide solution includes a specific gravity sensor 30 arranged to actuate a pair of pumps 12 for pumping fresh solution into and spent solution out of the etching bath when the specific gravity reaches a predetermined value, the specific gravity being a measure of the copper content. The sensor 30 includes a support unit 36 enclosing a magnetically operable reed switch 38, an arm 40 pivoted to the support unit at 34, a magnet 42 on the arm for operating the switch, and a float body 52 at the end of the arm. The float body is constructed so that the specific gravity at which the arm tilts upwards to operate the reed switch can be adjusted to this end, the float body either includes a screwthread cap 56 defining a variable volume filled with air or foamed plastics (Fig. 3) or includes a nut adjustable along the body (Fig. 4, not shown) to prevent the pumping and non- pumping periods from being too short, either the arm 40 is arranged to be frictionally bound to the axle 34, or the fresh solution is introduced to the bath at a point remote from the sensor 30.
GB4223073A 1972-09-07 1973-09-07 Specific gravity controlling means Expired GB1441324A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US287054A US3868485A (en) 1972-09-07 1972-09-07 Density sensing probe switch with adjustable float

Publications (1)

Publication Number Publication Date
GB1441324A true GB1441324A (en) 1976-06-30

Family

ID=23101269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4223073A Expired GB1441324A (en) 1972-09-07 1973-09-07 Specific gravity controlling means

Country Status (6)

Country Link
US (1) US3868485A (en)
JP (1) JPS4993053A (en)
BE (1) BE804587A (en)
CA (1) CA984172A (en)
FR (1) FR2199402A5 (en)
GB (1) GB1441324A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3046536A1 (en) * 1980-12-10 1982-07-15 Siemens AG, 1000 Berlin und 8000 München Liq. density regulator using position transducer - has buoyancy body density sensor with pivot remote from centre of gravity

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438016A1 (en) * 1978-10-05 1980-04-30 Esswein Sa Alarm warning to add regenerative salt to water softener etc. - uses switch held open by submerged float carrying gradually dissolving salt
US4513185A (en) * 1982-01-19 1985-04-23 Lucas Industries Float operated electrical switch assembly
US4489224A (en) * 1983-04-01 1984-12-18 The Bendix Corporation Fluid level indicator
US4755790A (en) * 1984-07-04 1988-07-05 Suzuki Jidosha Kogyo Kabushiki Kaisha Float switch, a control apparatus and a warning apparatus of an engine
US4848151A (en) * 1985-03-08 1989-07-18 Kelsey-Hayes Company Liquid level detector
US4748299A (en) * 1987-07-24 1988-05-31 Cte Chem Tech Equipment Corp. Level sensing system with latching device
JP2577461B2 (en) * 1988-10-26 1997-01-29 株式会社 ソミック石川 Liquid level indicator
GB8907419D0 (en) * 1989-04-01 1989-05-17 Cooper Robert Liquid level monitoring apparatus
DE4116176A1 (en) * 1990-06-02 1991-12-05 Abdolreza Sarzaeim Immersion unit for measuring density, temp. and pressure - is cylindrical body working on Archimedean principle when immersed in liq. or gas
US5374790A (en) * 1993-02-05 1994-12-20 Rochester Gauges, Inc. Liquid level switch assembly
US5581062A (en) * 1993-08-17 1996-12-03 Standex International Corporation Side-mountable liquid level sensor assembly
US5757483A (en) * 1997-08-06 1998-05-26 Stellarnet, Inc. Dual beam optical spectrograph
US6253608B1 (en) 1999-08-27 2001-07-03 Standex International Corporation Side mount liquid level sensor with enhanced float travel
US6846994B2 (en) * 2001-09-19 2005-01-25 Justin B. Wenner System and method to delay closure of a normally closed electrical circuit
US8840960B2 (en) * 2006-11-01 2014-09-23 United Technologies Corporation Method of cleaning carbon composite prior to application of thermal coating
US9362072B2 (en) 2012-06-07 2016-06-07 Pentair Flow Technologies, Llc Magnetic float switch

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1680697A (en) * 1927-07-05 1928-08-14 Fedders Mfg Co Inc Hollow body
US2627178A (en) * 1951-01-02 1953-02-03 John T Hayward Liquid level rate of change indicating device
US2726296A (en) * 1953-06-22 1955-12-06 Louis P Hanson Magnetically operated float switch
US2896038A (en) * 1957-01-18 1959-07-21 Gerber Harry Swimming pool alarm
US3307126A (en) * 1963-08-20 1967-02-28 Sylvania Electric Prod Encapsulated magnetic switch
US3265822A (en) * 1964-12-14 1966-08-09 Jesse H Moulton Tire pressure indicating device
US3333072A (en) * 1965-05-13 1967-07-25 Telsco Ind Rain responsive circuit breaker
US3322917A (en) * 1966-01-25 1967-05-30 Black Sivalls & Bryson Inc Float switch
US3309474A (en) * 1966-01-25 1967-03-14 Selby S Soward Rainfall actuated switching apparatus
US3471665A (en) * 1967-05-26 1969-10-07 Simmonds Precision Products Magnetic reed float switch for use within the interior of a liquid container having a removable installation feature
US3702910A (en) * 1971-03-24 1972-11-14 Simmonds Precision Products Magnetic float point sensor for high pressure containers
US3820098A (en) * 1972-04-18 1974-06-25 T Demyon Electrical and visual fluid level sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3046536A1 (en) * 1980-12-10 1982-07-15 Siemens AG, 1000 Berlin und 8000 München Liq. density regulator using position transducer - has buoyancy body density sensor with pivot remote from centre of gravity

Also Published As

Publication number Publication date
JPS4993053A (en) 1974-09-04
BE804587A (en) 1974-01-02
FR2199402A5 (en) 1974-04-05
CA984172A (en) 1976-02-24
US3868485A (en) 1975-02-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee