GB257064A - Improvements in electric rheostats - Google Patents

Improvements in electric rheostats

Info

Publication number
GB257064A
GB257064A GB1786325A GB1786325A GB257064A GB 257064 A GB257064 A GB 257064A GB 1786325 A GB1786325 A GB 1786325A GB 1786325 A GB1786325 A GB 1786325A GB 257064 A GB257064 A GB 257064A
Authority
GB
United Kingdom
Prior art keywords
cylinders
resistance
propellers
rotated
resistance elements
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
GB1786325A
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.)
Crompton & Co Ltd
Original Assignee
Crompton & Co Ltd
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 Crompton & Co Ltd filed Critical Crompton & Co Ltd
Priority to GB1786325A priority Critical patent/GB257064A/en
Publication of GB257064A publication Critical patent/GB257064A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/16—Adjustable resistors including plural resistive elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)

Abstract

257,064. Crompton & Co., Ltd., and Jones,. W. F. July 13, 1925. Controllers, interlocking.- In rheostats for use in connection with motor starters in which the resistance elements are rotated to vary the resistance the elements are cooled by a medium, preferably oil or water, which is agitated by propellers rotated on moving the resistance elements. In the arrangements shown the resistance elements are wound on insulating cylinders along which contact rings are moved as described in Specifi. cation 242,807, [Class 38 (ii), Electric currents, Converting but devices such as that described in Specification 19604/00, [Class 37, Electricity. Measuring &c.], may also be employed. In the arrangement shown in Fig. 1, the cylinders L carrying the resistance elements are arranged around a spindle Z from which they are rotated by gears T, U and which carries propellers DD. The starting switch EE may be closed by a rod actuated by the contact rings when these are at the top of the cylinders L so that it can only be closed when the whole resistance is in circuit, being thereafter held .m electromagnetically. In the arrangement shown in Fig. 8 three cylinders L are carried by a single spindle Z which also carries the propellers DD. Fixed rings A connect metal bands HH on the cylinders connected to the ends of resistance wires to conductors JJ while the moving contact rings A<1> slide on a conduct rod LL. A nut NN on the spindle Z actuates interlocking gear through a rod SS or may operate an interlocking switch directly. If water is used as the cooling medium it may be covered with a layer of oil. Specification 235,311 also is referred to.
GB1786325A 1925-07-13 1925-07-13 Improvements in electric rheostats Expired GB257064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1786325A GB257064A (en) 1925-07-13 1925-07-13 Improvements in electric rheostats

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1786325A GB257064A (en) 1925-07-13 1925-07-13 Improvements in electric rheostats

Publications (1)

Publication Number Publication Date
GB257064A true GB257064A (en) 1926-08-26

Family

ID=10102520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1786325A Expired GB257064A (en) 1925-07-13 1925-07-13 Improvements in electric rheostats

Country Status (1)

Country Link
GB (1) GB257064A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329918A (en) * 1965-09-14 1967-07-04 Glenn E Mealy High voltage divider system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329918A (en) * 1965-09-14 1967-07-04 Glenn E Mealy High voltage divider system

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