US1935573A - Releasing clamp - Google Patents

Releasing clamp Download PDF

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Publication number
US1935573A
US1935573A US317856A US31785628A US1935573A US 1935573 A US1935573 A US 1935573A US 317856 A US317856 A US 317856A US 31785628 A US31785628 A US 31785628A US 1935573 A US1935573 A US 1935573A
Authority
US
United States
Prior art keywords
conductor
clamp
openings
clamping member
clamping
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 - Lifetime
Application number
US317856A
Other languages
English (en)
Inventor
Jr Stewart L Moore
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.)
LOCKE INSULATOR Corp
Original Assignee
LOCKE INSULATOR 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 LOCKE INSULATOR CORP filed Critical LOCKE INSULATOR CORP
Priority to US317856A priority Critical patent/US1935573A/en
Priority to FR37603D priority patent/FR37603E/fr
Application granted granted Critical
Publication of US1935573A publication Critical patent/US1935573A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/05—Suspension arrangements or devices for electric cables or lines
    • H02G7/053—Suspension clamps and clips for electric overhead lines not suspended to a supporting wire
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3936—Pivoted part
    • Y10T24/3953—Pivotal means with plate aperture

Definitions

  • An important object of the invention is to provide a clamp for this purpose of such formation that it will becapable of regripping the conductor after the conductor has been released and has slid through a plurality of clamps at a series of towers until the strain has been substantially equalized.
  • Still another object of the invention is to provide a clamp embodying .a resilient or spring clamping member positively forced into engagement with the conductor; it being a feature that the thickness or gauge of the material from which the spring clamping member is formed provides means whereby the degree of holding action may be regulated so as to permit or insure release of the clamping action upon the occurrence of a certain definite predetermined pull or strain, this feature rendering it possible to make use of a single type and size of clamp, with a selectively usable movable and removable clamping member,
  • Another object is to provide a clamp having means whereby the relatively movable clamping member will be prevented from actual separation or disengagement from the main body or relatively fixed clamping member, dropping down and probable loss being thereby avoided,
  • An additional object is to provide a clamp of this character which will be simple and inexpensive to manufacture, easy to install, positive in action, ,eflicient and durable in service, and a general improvement in the art;
  • Figure 1 is a side elevation of the clamp. in position upon a conductor
  • Figure 2 is a vertical longitudinal section through the main body orrelatively stationary member
  • Figure 3 is an end elevation withlthe. conductor in section
  • the clamp as comprising a main body or relatively stationary member 1,- a relatively' elongated stirrup-like form.
  • this member may very well be U-shaped in vertical cross section, thus providing spaced sides 5 connected by a seat 6 which preferably conforms to the curvature of theconductor'to be held.
  • the ends of the seat portion are preferably flared or-curved downwardly as at 7 to avoid contact of the-edges with the conductor 8. It is also preferable that the sides 5'be formed-with openings 9-which need not, however, have the specific shape disclosed.
  • the movable clamping member 2 is preferably of. sheet metal construction andmay'be longitudinally bowed upwardlyat itscenter as shown in Figure 1 for cooperation with a cam extension 10, or its equivalent, formed on or carried by the suspension member 3. It is preferable that the ends of the member 2 curve upwardly away from the conductor 8 to prevent edge contact therewith.
  • the former is shown as having lateral projections 11 fitting somewhat loose-- ly within the openings 9 though it is apparent that some other detailed construction could be used instead.
  • a very convenient structure is that the entire device be formed of sheet metal though I do not care to be limited in this respect as the invention is of greater scope.
  • the clamping member may be rigid. The point is that there is a reaction between the body or stirrup and the clamping member and by making one or the other yieldable to a limited extent certain advantages will enure,
  • the bolt l above referred to provides an extremely simple means for connecting the suspension member 3 with the body member 1, this bolt or pin simply passing through a hole 12 in the suspension member and seating within the upper ends of the openings 9.
  • this element 4 is shown as a pin equipped with a cotter 13 to prevent withdrawal though it is quite apparent that a bolt and nut may be used if preferred.
  • the specific construction of the suspension member 3 is of little importance though it is shown as of clevis formation and provided in its upper end with holes i l to permit connection, by a belt or the like, with a suspension element attached directly, or through some intermediate means, to the lower end of a string of insulators, not shown.
  • the main member 1 is engaged beneath the conductor 8, subsequently to which the relatively movable member 2 is inserted within it so as to lie on top of the conductor, it being easily possible to cant or tilt the member 2 to bring the projections 11 into the openings 9.
  • the suspension member 3 should be plain that to complete the assembly the suspension member 3 should be inclined from the vertical so that the cam projection 10 will not engage upon the member 2.
  • the hole 12 must be lined upwith the openings 9 so that the pin or bolt 4 may be inserted and cottered.
  • the suspension member 3 When weight is then permitted to come upon the as sembly, the suspension member 3 will assume a vertical position with the cam projection 10 contacting firmly with and depressing the center of the clamping member 2 so that this member will grip the conductor firmly. This action will be maintained or will continue while the member 3 is in normal or substantially vertical position, as it will be when there is no difference in strain on the conductorat either side of the clamp.
  • a very important feature is the making of the member 2 from sheet material. Clearly, if a thinner material is used the clamping action will be less and the clamp will release at a lighter pull than would be the case if the thickness of the member 2 were to be increased. By this one means it therefore becomes possible to use the clamp in different installations as it is merely necessary to have the interchangeable members 2 of different gauge or thickness.
  • the shape of the cam extension 10 may be varied if found advisable, depending upon the inclination of the insulator string at which release is desired. No elaborate data is given as to the curvature or other shape as there are so many possibilities and as this is a detail which may well be worked out by actual experimentation.
  • a clamp of the character described comprising an elongated stirrup-like main member having upstanding sides, a relatively movable member located between the sides of said first named member and provided with lugs at its sides, and a suspensionmember pivoted between the sides of said first named member and having a cam projection normally engaging the second named member for eifecting a clamping action on a conductor, said sides having openings receiving said lugs, and the pivotal connection between the first named member and the suspension member being engaged within said openings.
  • a clamp of the character described comprising a relatively stationary clamping member disposable beneath a conductor, a relatively movable clamping member formed as a leaf spring disposable above the conductor within the confines of said relatively stationary clamping member, means for preventing relative longitudinal movement of said members comprising lugs on the movable member engaged within the lower including a bolt engaged within theupper ends or" said openings and reacting against the upper edges thereof.
  • a clamp for supporting a conductor comprising an elongated channel shaped body hav- 4.
  • a clamp for supporting a conductor comprising an elongated channel shaped body having the intermediate portion of its sides upwardly extended, and formed with vertically elongated openings with rounded upper ends, a longitua dinally bowed member located within said channel shaped member and having laterally projecting lugs received within the lower portions of said openings, a suspension member provided at its lower end with a cam portion reacting against the center of said clamping member, and

Landscapes

  • Suspension Of Electric Lines Or Cables (AREA)
  • Insulators (AREA)
US317856A 1928-11-07 1928-11-07 Releasing clamp Expired - Lifetime US1935573A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US317856A US1935573A (en) 1928-11-07 1928-11-07 Releasing clamp
FR37603D FR37603E (fr) 1928-11-07 1929-11-07 Perfectionnements aux pinces pour conducteurs électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US317856A US1935573A (en) 1928-11-07 1928-11-07 Releasing clamp

Publications (1)

Publication Number Publication Date
US1935573A true US1935573A (en) 1933-11-14

Family

ID=23235553

Family Applications (1)

Application Number Title Priority Date Filing Date
US317856A Expired - Lifetime US1935573A (en) 1928-11-07 1928-11-07 Releasing clamp

Country Status (2)

Country Link
US (1) US1935573A (fr)
FR (1) FR37603E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026077A (en) * 1951-06-08 1962-03-20 Preformed Line Products Co Support for armored cables

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026077A (en) * 1951-06-08 1962-03-20 Preformed Line Products Co Support for armored cables

Also Published As

Publication number Publication date
FR37603E (fr) 1930-01-08

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