IT987391B - DIVE TIME METER INDICATING DIVE TIME STILL AVAILABLE TO A DIVER - Google Patents

DIVE TIME METER INDICATING DIVE TIME STILL AVAILABLE TO A DIVER

Info

Publication number
IT987391B
IT987391B IT24010/73A IT2401073A IT987391B IT 987391 B IT987391 B IT 987391B IT 24010/73 A IT24010/73 A IT 24010/73A IT 2401073 A IT2401073 A IT 2401073A IT 987391 B IT987391 B IT 987391B
Authority
IT
Italy
Prior art keywords
pressure
diver
dive time
still available
responsive means
Prior art date
Application number
IT24010/73A
Other languages
Italian (it)
Original Assignee
Leemann K
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 Leemann K filed Critical Leemann K
Application granted granted Critical
Publication of IT987391B publication Critical patent/IT987391B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
    • G01L13/021—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using deformable tubes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • G01L13/02—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements
    • G01L13/025—Devices or apparatus for measuring differences of two or more fluid pressure values using elastically-deformable members or pistons as sensing elements using diaphragms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/04—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges
    • G01L7/041—Construction or mounting of deformable tubes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
    • G01L7/04—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges
    • G01L7/043—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges in the form of flexible, deformable tubes, e.g. Bourdon gauges with mechanical transmitting or indicating means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B47/00—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece
    • G04B47/06—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece with attached measuring instruments, e.g. pedometer, barometer, thermometer or compass
    • G04B47/066—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece with attached measuring instruments, e.g. pedometer, barometer, thermometer or compass with a pressure sensor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Electric Clocks (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A diving time measuring device indicates the remaining diving time available to a diver with a specified initial volume VA of breathable gas. The device includes a first pressure responsive means sensitive to the pressure difference PG between the gas supply pressure and the surrounding water pressure. This is rigidly connected to a second pressure responsive means that is responsive only to the water pressure PW. The two means are arranged so that an arm, attached to the second pressure responsive means, moves in orthogonal directions in response respectively to the pressure difference and to the water pressure. The relative orthogonal displacements of the arm designate the remaining available diving time t in accordance with the formula t = VG/VA . PG/(PW+1) wherein VA is the average volume of gas used by the diver per unit time.
IT24010/73A 1972-05-16 1973-05-11 DIVE TIME METER INDICATING DIVE TIME STILL AVAILABLE TO A DIVER IT987391B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH727672A CH552237A (en) 1972-05-16 1972-05-16

Publications (1)

Publication Number Publication Date
IT987391B true IT987391B (en) 1975-02-20

Family

ID=4322589

Family Applications (1)

Application Number Title Priority Date Filing Date
IT24010/73A IT987391B (en) 1972-05-16 1973-05-11 DIVE TIME METER INDICATING DIVE TIME STILL AVAILABLE TO A DIVER

Country Status (5)

Country Link
US (1) US3864977A (en)
CH (1) CH552237A (en)
DE (1) DE2322300A1 (en)
FR (1) FR2185048B3 (en)
IT (1) IT987391B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400977A (en) * 1980-02-29 1983-08-30 Pavel Gross Combined indicating apparatus for scuba divers
US4782338A (en) * 1982-01-21 1988-11-01 Orca Industries, Inc. Display scheme for decompression data
US5049864A (en) * 1982-01-21 1991-09-17 Orca Ii, Inc. Display scheme for decompression data
DE19547429C2 (en) * 1994-06-06 1999-01-07 Foerderverein Inst Fuer Medizi Method and breathing gas controller for determining the remaining time of use of breathing apparatus
GB2311015B (en) * 1996-03-13 2000-05-03 Cohen Ellis B Respiratory monitors for breathing apparatus
US6321177B1 (en) * 1999-01-12 2001-11-20 Dacor Corporation Programmable dive computer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528290A (en) * 1969-08-15 1970-09-15 Pittman Products Inc Depth meter attachment for underwater pressure gauges
US3715927A (en) * 1971-03-05 1973-02-13 R Grant Gauge for indicating exhaust time of air supply for scuba divers

Also Published As

Publication number Publication date
DE2322300A1 (en) 1973-12-06
CH552237A (en) 1974-07-31
CH727672A4 (en) 1973-12-28
FR2185048B3 (en) 1976-05-14
FR2185048A1 (en) 1973-12-28
US3864977A (en) 1975-02-11

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