Electric coil with lead locking means

Claim 2

An electric coil, comprising a bobbin having a flange on one end, and having a central bore extending therethrough, a wire coil wound about said bobbin, a lug integral with and projecting laterally from said flange and having two spaced, parallel bores therethrough, and a cordlock disposed on said flange, behind said lug in spaced relation thereto and having two spaced, parallel grooves aligned respectively, with said bores, a pair of wire leads connected to opposite ends of said coil and projecting from said bores of said lug across the space between said lug and said cordlock into said grooves, said leads being crossed one over the top of the other in said space.

Claim 3

An electric coil as defined in claim 1, wherein one of said grooves has an open side facing the bore in said bobbin, and a magnet is mounted in said central bore in operative relation to the lead wire in said one groove to lock the last-named lead wire therein.

Claim 4

A core form for an electrical coil of the type in which opposite ends of the coil are electrically connected to a pair of wire leads, comprising a central, tubular section about which a wire coil is adapted to be wound, a pair of axially spaced end flanges integral with opposite ends, respectively, of said central section, and projecting laterally beyond the perimeter of said central section, a lug projecting laterally from one of said flanges and having therethrough a pair of spaced, parallel bores for housing the junctions of the coil ends and the attached wire leads, with the wire leads extending from one end of said lug, and a cordlock projecting laterally from said one flange in spaced, confronting relation to said one end of said lug, said cordlock having in opposite sides thereof a pair of spaced grooves which register with said bores in said lug, the space between said lug and said cordlock being just large enough snugly to accommodate said leads when one lead is bent to extend one over the top of the other through said space, and into that groove in the side of said cordlock which is offset laterally from that bore in said lug from which the one lead extends.

Claim 5

A core form for an electrical coil of the type in which opposite ends of the coil are electrically connected to a pair of wire leads, comprising a central, tubular section about which a wire coil is adapted to be wound, a pair of axially spaced end flanges integral with opposite ends, respectively, of said central section, and projecting laterally beyond the perimeter of said central section, a lug projecting laterally from one of said flanges and having therethrough a pair of spaced, parallel bores for housing the junctions of the coil ends and the attached wire leads, with the wire leads extending from one end of said lug, and a cordlock projecting laterally from said one flange in spaced, confronting relation to said one end of said lug, said cordlock having in opposite sides thereof a pair of spaced grooves which register with said bores in said lug, the space between said lug and said cordlock being just large enough snugly to accommodate said leads when one lead is bent to extend one over the top of the other through said space, and into that groove in the side of said cordlock which is offset laterally from that bore in said lug from which the one lead extends.

Claim 6

A core form as defined in claim 3, wherein an internal shoulder is formed on the wall of each of said bores intermediate its ends.

Claim 7

A core form as defined in claim 3, wherein said one flange has in its edge a pair of generally V-shaped notches each of which is parallel to one of the bores of said lug and opens at one side on said one bore.

Claim 8

An electric coil comprising a bobbin having a central bore, a soft iron core in said bore, an electric wire coil wrapped around said bobbin, two lead wires, means connecting the two ends of said coil, respectively, to said two lead wires, a cordlock on said bobbin, one of said lead wires being disposed between said cordlock and said core so that said one lead wire is held against strain on its connecting means by said cordlock and said core, and means including said one lead wire for frictionally holding the other lead wire against strain on its connecting means.

Claim 9

An electric coil comprising a bobbin having a central bore, a soft iron core in said bore, an electric wire coil wrapped around said bobbin, two lead wires, means connecting the two ends of said coil, respectively, to said two lead wires, a cordlock on said bobbin, one of said lead wires being disposed between said cordlock and said core so that said one lead wire is held against strain on its connecting means by said cordlock and said core, and means including said one lead wire for frictionally holding the other lead wire against strain on its connecting means.

Claim 10

An electric coil as claimed in claim 6, wherein the bobbin has a lug thereon with two parallel bores to receive the two coil ends, the connecting means, and the connected ends of the respective lead wires, said cordlock is spaced from said lug and has therein two parallel ducts through which said two lead wires pass, said ducts are aligned axially with said bores, and each of said lead wires passes from one of said ducts into the non-aligned bore being bent at right angles twice in the space between the lug and the cordlock for this purpose, and said one lead wire overlies in said space said other lead wire.

Claim 11

A bobbin for an electrical coil comprising a centrally-bored bobbin having a core and a coil wound thereon, and having flanges at opposite ends, a lug projecting laterally from each flange, each lug having two parallel bores whose axes are at right angles to the longitudinal center line of the central bore of the bobbin, the bore of each lug being of larger diameter for a portion of its length than for the remainder thereof so that each bore in each lug has an internal shoulder therein intermediate its ends, the two lugs being disposed on the two end flanges of the bobbin at the same sides thereof, a cordlock disposed on each flange behind and spaced from the associated lug but in alignment therewith, each cordlock having two parallel open-sided grooves therein, aligned, respectively, with the bores in the associated lug, the central bore of said bobbin being adapted to receive a magnet, the bores of one of said lugs being adapted to receive the ends of said coil and the ends of lead wires for conducting electrical current thereto, and the connections between said coil ends and said lead wire ends, each groove being adapted to hold a lead wire that extends from the respective groove into the lug bore non-aligned with that groove, and the space between each lug and its associated cordlock being sufficiently wide to permit one lead wire to be crossed over the other to allow the lead wire extending from one groove to enter a non-aligned groove, said magnet being positioned in operative relation to a lead wire in one of said grooves.

Claim 12

A bobbin for an electrical coil comprising a centrally-bored bobbin having a core and a coil wound thereon, and having flanges at opposite ends, a lug projecting laterally from each flange, each lug having two parallel bores whose axes are at right angles to the longitudinal center line of the central bore of the bobbin, the bore of each lug being of larger diameter for a portion of its length than for the remainder thereof so that each bore in each lug has an internal shoulder therein intermediate its ends, the two lugs being disposed on the two end flanges of the bobbin at the same sides thereof, a cordlock disposed on each flange behind and spaced from the associated lug but in alignment therewith, each cordlock having two parallel open-sided grooves therein, aligned, respectively, with the bores in the associated lug, the central bore of said bobbin being adapted to receive a magnet, the bores of one of said lugs being adapted to receive the ends of said coil and the ends of lead wires for conducting electrical current thereto, and the connections between said coil ends and said lead wire ends, each groove being adapted to hold a lead wire that extends from the respective groove into the lug bore non-aligned with that groove, and the space between each lug and its associated cordlock being sufficiently wide to permit one lead wire to be crossed over the other to allow the lead wire extending from one groove to enter a non-aligned groove, said magnet being positioned in operative relation to a lead wire in one of said grooves.