US1866104A - Insulator bracket - Google Patents

Description

July 5, 1932.

w M. HEIM TNSULATOR BRACKET Filed Sept. 21. 1927 INVENTOR WM M. M

Patented July 5, 1932 ,UNITED STATES:

WARREN ivLnRiM, F PrrrsBu GH, PENnsYLvANIA, ASSIGNORTO o xvER r onnNn STEEL CORPORATION, oF'PI'rTsBURGH,PEN SYLVA IA, A co Po A'rIoN o r RN- SYLVANIA INsULA'roR BRACKET] o i Application filed September 21, 1927. Serial R0. 220,969. i

been devised which are fabricated from a joints, causing corrosion of the metal and combination of rolled and pressed metal parts. The fabrication of insulator bracketsfrom rolled and pressed metal-parts as here tofore practiced requires, ordinarily, the use 1 of a large number of rivets and spacers to secure the several parts together. Such insulator brackets have a plurality of joints between the parts into which the acid used in cleaning the metal prior to galvanizing the same collects. oughly removed prior to galvanizing and after galvanizing this acid is present in the causing the galvanizing to break down, al-

lowingthe insulator bracket to rust at these joints. A further difliculty encountered in insulator brackets wherein the parts are all made of rolled metal and pressed sheet metal parts, resides in the fact that it is difl'icult to provide a bracket arm having the necessary rigidity and which at the same time provides a wide bearing surface for the insulator pin.

According to the present invention there is provided an insulator bracket having a one 3 piece rolled metal base and forged arms which will obviate the disadvantages in the usual combination rolled and pressed sheet metal insulator brackets, and which will be stronger and which, at the same time, can be cheaply manufactured and easily assembled.

The invention may be readily understood by reference to the accompanying drawing, in which I I Figure 1 is a side view of an insulator 5 bracket embodying my invention;

Figure 2 is a front view thereof; Figure 3 is a top or end view of the bracket; Figure 4 is a detail view showing one of the arms of the bracket, and

Figure 5 is a cross section in the plane of line V-V of Figure 4. V I

In the drawing 2 designates generally the base member of the insulator bracket. This base member is formed of a single piece of rolled metal which in the form of a chan- This acid can notbe thornel or rib having flanges?) at reach-side thereof. The bottom of the channelis designated 4 and the sides are designated '5. Part 4 of the channel or rib is preferably thicker than the remalning part of the-base and is provided w1thholes6 therethrough;

Inserted in other non-circular holesgti and. Q

secured to the'baseare arms designated gen erally as 7 Each-"armhas an outer-terminal portion 8 with a hole 9 therethrough,- the portion 8 w th its hole providing an eye or sleeve for the reception of the insulator pin 10. The shank of'the arm7 is designated l1, and is preferably substantially channellike in cross sectionas clearly shown in Fig-- ure 5, the top of the channelbeingrounded' and the sides thereof being flat; The channel is preferably of increasing height and 'width toward' the inner end thereof; the inner'end of the arm' being substantially as wide-as the rib or channel-4 on the'base whileit tapers indicated ati'12 so that the armhas a solid metal end portion tobear against the outside toward the eye 8 at its outerend. The inner end of the channel of the'arm is "closedpas of therib or channel 4. V Projecting from this] solidend 12 of the arm iszan extension 13 whichzis preferablynon circular. This ex-- tension passes through the non circular hole 6 1nthe'part 4 of the baseandiis upset or f peaned over as indicated at 14 to firmlyse cure the arm to the base; By reasonof the non-circular s'hape'of the/extension 13, the arm is more effectively heldagainst rotation, and the upset end 14 of this extension'fills thewidth'of the inside of therib. or. channel toalsopreventrotationof the arm; 1 Each armis'forged completely from a sin-1 gle piece of metal. The. eye 8 for the insu-i lator pin gives 'a wide bearingsurface for the pin which prevents the tendencyofothe pin'whenit. is under-tensiontonlenlarge the o openingthroughwhich it passes, In [the usual insulator bracket wherein the arms are;

madeof pressed sheet metal only a veryfnar I'Iowedge'of metal is available asa'bearing metal around the eye portion so that it rusts. This possibility is avoided in the present construction. The insulator pin itself is less likely to bend by reason of the wide bearing surface provided for supporting and bracing it. This reduces the breakage of insulators due to the pins bending. r

By reason of the part 4 of the channel being thicker than the remaining part of the channel, the weight of the'base is reduced 1,,

. therefrom prior .to-galvanizing. f

1Considerablereduction in cost results from the use of a rolled metal base comprising av single piece of metal becau'seit can be cheaply produced, and easily cut to the necessary length. By the use offorged horizontal arms, the assembly of the bracket is sim pli fied and greater strength is assured, The preferred channel-like cross section of the horizontal arms combines ample strength with lightness of construction. .The rounded tops of these arms prevent. damage to the insulation of. wiresbeingpulled-thereover in wire stringing and also makes the bracket site side of the base member for securing the arm to .the base member.

2. In an insulator bracket, an integral arm having a solid inner end portion with a projecting terminal thereon adapted to be riveted over, an intermediate shank portion of channel-shaped cross-section, and an outer terminal portion having an eye therein, the thickness of the outer terminal portion being greater than the thickness of the web portion of the channel.

In testimony whereof I have hereunto set my hand.

.WARREN M. HEIM.

easy to handle and ,eifectively sheds the water.

The assembled article is of neat appearance, especially in that there are no rivet heads or projections on the sides of the base member. I The elimination of, projections from the sides ofthe base member also'makes the article. easier 7 i to handle. Projecting parts on thesideof the base, common'to most devices of this kind, are-apt to injure the insulation of wire being pulled over the bracket, and also collect water, ice and dirt whichtends to cause rustingat these points.

While I have: described. one specific embodiment ofiny invention, it will be understood'that'various changes and modifications may be made'in the detail construction and design of parts within the contemplation of my invention and under the-"scope of the following claims. 7 *Iclaim'f .1; In an insulator bracket, a base member,

aiforgedmetalarm secured to the base memher having 'an'cye at the outer end thereof andha'ving a sh-ankportion which is chan. ne'l-sha'ped in'c'rosssection, thefinner end of the armbeing solid in cross section andhav-- ing anexten'sionthereon projecting through; the'base member and upseta'g'ainst the oppo

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