US1488749A - Leveling device - Google Patents

Leveling device Download PDF

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Publication number
US1488749A
US1488749A US370409A US37040920A US1488749A US 1488749 A US1488749 A US 1488749A US 370409 A US370409 A US 370409A US 37040920 A US37040920 A US 37040920A US 1488749 A US1488749 A US 1488749A
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Prior art keywords
tube
leveling device
transparent
liquid
valve seat
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Expired - Lifetime
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US370409A
Inventor
Franz Jacob
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Individual
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Priority to US370409A priority Critical patent/US1488749A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points

Definitions

  • the object of this invention is to level dierent points, particularly such points as lo have intervening obstructions.
  • Fig. 1 shows an elevation of the device.
  • Fig. 2 a central section of one ef the ends.
  • Fig. 3 a plan view of the transparent end tube.
  • l indicates a flexible tube. This may be of any desired length.
  • 2 indicates transparent tubes connected with the ends of the 2o flexible tube.
  • the tip has a discharge air opening 5 leading to it and a valve seat 6 on the inner surface of the ti surrounding the Aopening 5.
  • a ball c eck 7 preferably in the form of a float valve is adapted to close the opening 5 when subjected to the action of the liquid either by the rising of the liquid in the transparent tube or by a flow of the liquid with a depression ofthe tube.
  • valve seat in the upper end of the tube 2 is provided with grooves 8 in order to maintain communication between the interior of the tube and the atmosphere when the ball float 7 rests on the valve seat.
  • a flexibleftube In a leveling device, a flexibleftube; a transparent tube at each end of the flexible tube; a valve on each of the transparent tubes comprising a case with a valve seat 00 at the outer discharge side of the case; a ball iioat operating on the seat, the surface of the loat seating directly on the valve seat; and means preventing the float from forming a closure excluding the air.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Control Of Non-Electrical Variables (AREA)

Description

April 1, 1924. 1,488,749
J. FRANZ LEVELING DEVICE Filed April l 1920 NVENTOR Patented Apr. l, 1924.
UNITED STATES JACOB FRANZ, F ERIE, PENNSYLVANIA.
LEVELING DEVICE.
Application led April 1, 1920. Serial No. 370,409.
To all whom it may concern.'
Be it known that I, JACOB FRANZ, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented newand useful Improvements in a Leveling Device, of which the following is a specification.
The object of this invention is to level dierent points, particularly such points as lo have intervening obstructions.
The invention is illustrated in the accompanying drawings as follows Fig. 1 shows an elevation of the device.
Fig. 2 a central section of one ef the ends.
Fig. 3 a plan view of the transparent end tube.
l indicates a flexible tube. This may be of any desired length. 2 indicates transparent tubes connected with the ends of the 2o flexible tube. Scales 3 `are provided 0n the transparent observation of a contained liquid A in the tubes.
Devices of this character have been heretofore used but the difficulty with such devices has been that when the transparent tube at one end has been' accidentally depressed below the other transparent tube a part of the liquid was discharged so that :10 constantl care had to be encountered in maintaining the transparent tubes at approximately the same level. With the present device an automatic valve is provided which prevents the discharge of the liquid and is tubes so as to facilitate they preferably so arranged as to allow the air to have free egress and ingress to and from the tube so that there may be no diderences in Yair pressure on the liquid. This is acf complished by the following devices :--A tip 4 is arranged at the end of each trans- 40 parenttube. The tip has a discharge air opening 5 leading to it and a valve seat 6 on the inner surface of the ti surrounding the Aopening 5. A ball c eck 7 preferably in the form of a float valve is adapted to close the opening 5 when subjected to the action of the liquid either by the rising of the liquid in the transparent tube or by a flow of the liquid with a depression ofthe tube.
The valve seat in the upper end of the tube 2 is provided with grooves 8 in order to maintain communication between the interior of the tube and the atmosphere when the ball float 7 rests on the valve seat.
What I claim as new is In a leveling device, a flexibleftube; a transparent tube at each end of the flexible tube; a valve on each of the transparent tubes comprising a case with a valve seat 00 at the outer discharge side of the case; a ball iioat operating on the seat, the surface of the loat seating directly on the valve seat; and means preventing the float from forming a closure excluding the air. 65
- In testimony whereof I have hereunto set my hand.
JACOB FRANZ.
US370409A 1920-04-01 1920-04-01 Leveling device Expired - Lifetime US1488749A (en)

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US370409A US1488749A (en) 1920-04-01 1920-04-01 Leveling device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422244A (en) * 1981-12-04 1983-12-27 Louis Gauthier Elevation indicator
US4794704A (en) * 1987-12-14 1989-01-03 Loreto Calcagni Height level measuring device
US11680795B1 (en) * 2022-02-17 2023-06-20 Clifford Johnson Grade-leveling tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422244A (en) * 1981-12-04 1983-12-27 Louis Gauthier Elevation indicator
US4794704A (en) * 1987-12-14 1989-01-03 Loreto Calcagni Height level measuring device
US11680795B1 (en) * 2022-02-17 2023-06-20 Clifford Johnson Grade-leveling tool

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