GB503932A - Improvements in or relating to levelling devices - Google Patents

Improvements in or relating to levelling devices

Info

Publication number
GB503932A
GB503932A GB2821637A GB2821637A GB503932A GB 503932 A GB503932 A GB 503932A GB 2821637 A GB2821637 A GB 2821637A GB 2821637 A GB2821637 A GB 2821637A GB 503932 A GB503932 A GB 503932A
Authority
GB
United Kingdom
Prior art keywords
excavator
platform
mercury
switch
cylinders
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
GB2821637A
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.)
Caterpillar Global Mining LLC
Original Assignee
Bucyrus Erie Co
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 Bucyrus Erie Co filed Critical Bucyrus Erie Co
Priority to GB2821637A priority Critical patent/GB503932A/en
Publication of GB503932A publication Critical patent/GB503932A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/02—Travelling-gear, e.g. associated with slewing gears
    • E02F9/028—Travelling-gear, e.g. associated with slewing gears with arrangements for levelling the machine

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

503,932. Gravity switches ; selflevelling arrangements. RUSTONBUCYRUS, Ltd. (Bucyrus-Erie Co.) Oct. 16, 1937, No. 28216. [Class 38 (v)] [Also in Group XXXIII] A self-levelling device for an excavator comprises a switch box 18 on a triangular platform 17 suspended by rods 16 from girders 15 on the main platform of the excavator. This allows the platform 17 to swing freely but remain parallel to the excavator platform, and saves the switch mechanism from lateral shocks. The switch mechanism comprises four cylinders 21 joined in opposite pairs by pipes 22 provided with valves V for preventing surging of mercury contained in the cylinders and pipes. Each cylinder is provided with a piston 26, Fig. 4, which acts on a counterpoised lever 24 pivoted at 25 and carrying an adjustable tilting mercury switch 29. Variations of level of the excavator cause operation of one or more of the four mercury switches 29 which control motor driven pumps driving levelling jacks to keep the excavator level in accordance with the system described in Specification 503,931, [Group XXXV].
GB2821637A 1937-10-16 1937-10-16 Improvements in or relating to levelling devices Expired GB503932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2821637A GB503932A (en) 1937-10-16 1937-10-16 Improvements in or relating to levelling devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2821637A GB503932A (en) 1937-10-16 1937-10-16 Improvements in or relating to levelling devices

Publications (1)

Publication Number Publication Date
GB503932A true GB503932A (en) 1939-04-17

Family

ID=10272158

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2821637A Expired GB503932A (en) 1937-10-16 1937-10-16 Improvements in or relating to levelling devices

Country Status (1)

Country Link
GB (1) GB503932A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257917A (en) * 1962-04-02 1966-06-28 William H Lewis Road building machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257917A (en) * 1962-04-02 1966-06-28 William H Lewis Road building machine

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