1. A cap comprising:
a disc-shaped top;
a depending cylindrical wall extending at a substantially right angle from a circumference of the top and terminating at a lower edge in an inward facing annular lip;
a planar section extending radially outward from the lower edge of the wall and terminating in a downwardly- and outwardly-sloping outer edge;
at least two spaced perforations each extending radially outward across the planar section;
a pair of frangible lines separate from the perforation lines and defining a frangible strip extending from the outer edge, across the planar section, up the wall and across at least a portion of the disc-shaped top; and
a pull tab attached to the frangible strip adapted for destructive removal of the cap by pulling the pull tab to cause the frangible lines to tear and release the frangible strip from the outer edge, the planar section and at least part of the disc-shaped top.
2. The cap according to claim 1, further including a bump on the pull-tab for raising the pull tab enabling a person to more easily grasp the pull tab.
3. The cap according to claim 1, wherein the cap is formed of a single piece of molded plastic.
4. The cap according to claim 1, wherein the cap thickness is between 0.010 to 0.020 of an inch.
5. The cap according to claim 1, wherein the cap is made of a plastic material selected from the group consisting of a high density polyethylene (HDPE), polopopylene (PP), low density polyethylene (LDPE), polybutylene (PB), a blend of ethylene vinyl acetate (EVA) with PB, COPP, ultralow density ethylene copolymers, polyolefin plastomers, andor polyethylene.
6. The cap according to claim 1 wherein the annular lip is adapted to engage a drum cap affixed to the surface of a drum.
7. A cap comprising:
a disc-shaped top;
a depending cylindrical wall extending at a substantially right angle from a circumference of the top and terminating at a lower edge in an inward facing annular lip;
a planar section extending horizontally outward from the lower edge of the wall;
a ring at the lower edge of the planar section including perforations;
a pair of frangible lines, distinct from the perforations and defining a frangible strip extending from the lower edge of the wall, across the planar section, up the wall and across at least a portion of the disc-shaped top; and
a pull tab attached to the frangible strip adapted for destructive removal of the cap by pulling the pull tab to thereby tear and release the frangible strip from the lower edge of the wall and at least a part of the disc-shaped top.
8. The cap according to claim 7, further including a bump on the pull-tab for raising the pull tab enabling a person to more easily grasp the pull tab.
9. The cap according to claim 7, wherein the cap is formed of a single piece of molded plastic.
10. The cap according to claim 7, wherein the cap thickness is between 0.010 to 0.020 of an inch.
11. The cap according to claim 7, wherein the cap is made of a plastic material selected from the group consisting of a high density polyethylene (HDPE), polopopylene (PP), low density polyethylene (LDPE), polybutylene (PB), a blend of ethylene vinyl acetate (EVA) with PB, COPP, ultralow density ethylene copolymers, polyolefin plastomers, andor polyethylene.
12. The cap according to claim 7 wherein the annular lip is adapted to engage a drum cap affixed to the surface of a drum.
13. A cap comprising:
a substantially planar top;
a substantially cylindrical wall depending from the base of the top terminating in an internal annular lip;
a circular planar section depending from the exterior of the cylindrical wall;
a perforation defining a tamper evident means making up at least a portion of the planar section; and
a pair of frangible lines extending from the planar section, up the cylindrical wall and across a portion of the top, the frangible lines defining a frangible strip suitable for tearing to release the frangible strip from the planar section, the cylindrical wall and a portion of the top.
14. The cap according to claim 13, further including a bump on the pull-tab for raising the pull tab enabling a person to more easily grasp the pull tab.
15. The cap according to claim 13, wherein the cap is formed of a single piece of molded plastic.
16. The cap according to claim 13, wherein the cap thickness is between 0.010 to 0.020 of an inch.
17. The cap according to claim 13, wherein the cap is made of a plastic material selected from the group consisting of a high density polyethylene (HDPE), polopopylene (PP), low density polyethylene (LDPE), polybutylene (PB), a blend of ethylene vinyl acetate (EVA) with PB, COPP, ultralow density ethylene copolymers, polyolefin plastomers, andor polyethylene.
18. The cap according to claim 13 wherein the annular lip is adapted to engage a drum cap affixed to the surface of a drum.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A digital subscriber line induction neutralizing transformer for use in a digital subscriber line induction neutralizing transformer network comprising:
a core; and
a coil electrically coupled to and wound around said core and comprising approximately 100-200 feet of approximately 24 gauge wire;
said core and said coil adding longitudinal inductance to a telecommunication line and reducing induced voltage levels at a non-digital subscriber line frequency on said telecommunication line;
wherein said digital subscriber line induction neutralizing transformer does not include a screen or shield to prevent crosstalk interference.
2. A transformer as in claim 1 wherein adding longitudinal inductance comprises adding approximately 6 to 25 Henries of inductance to said telecommunication line.
3. A transformer as in claim 1 wherein said induced voltage levels are generated from a steady-state source or are surge-induced.
4. A transformer as in claim 1 wherein said core is a permeable ferromagnetic core formed from a ferromagnetic iron or nickel material.
5. A transformer as in claim 1 wherein said core and said coil neutralize at least 95% of approximately 50-100 volts on said telecommunication line instantaneously whether said induced voltage levels are generated from a steady-state source or are surge-induced.
6. A transformer as in claim 1 wherein said coil comprises category 5 Ethernet type telecommunication cable comprising tightly twisted wire pairs.
7. A transformer as in claim 1 wherein said coil is at least one of:
color-coated, unjacketed, plastic-insulated, or unshielded telecommunication cable.
8. A transformer as in claim 1 wherein said non-digital subscriber line frequency is approximately equal to 50 Hz or 60 Hz.
9. A digital subscriber line induction neutralizing transformer network comprising:
one or more remote terminals routing digital subscriber line communication signals to a plurality of customer terminals; and
one or more digital subscriber line circuits wherein at least one digital subscriber line circuit receives an excitation current from an induced voltage, said one or more digital subscriber line circuits comprising;
one or more transformer exciting networks electrically coupled to a remote terminal of said one or more remote terminals and supplying one or more low impedance paths to ground for said excitation current; and
a digital subscriber line induction neutralizing transformer electrically coupled to said one or more transformer exciting networks, the digital subscriber line induction neutralizing transformer comprising:
a core; and
a coil electrically coupled to and wound around said core and comprising approximately 100-200 feet of approximately 24 gauge wire;
said core and said coil adding longitudinal inductance to a telecommunication line and reducing induced voltage levels at a non-digital subscriber line frequency on said telecommunication line;
wherein said digital subscriber line induction neutralizing transformer does not include a screen or shield to prevent crosstalk interference.
10. A network as in claim 9 further comprising one or more central offices electrically coupled to said one or more remote terminals via one or more fiber optic cables and routing said digital subscriber line communication signals between said one or more remote terminals and a backbone network.
11. A network as in claim 9 wherein at least one transformer exciting network in the digital subscriber line induction neutralizing transformer network is a super transformer exciting network comprising a harmonic drainage reactor.
12. A network as in claim 9 wherein supplying one or more low impedance paths to ground said one or more transformer exciting networks reduce approximately 50 Hz or 60 Hz induced voltage levels and current levels.
13. A network as in claim 9 wherein a first transformer exciting network of said one or more transformer exciting networks is electrically coupled between a remote terminal and said digital subscriber line induction neutralizing transformer.
14. A network as in claim 9 wherein a second transformer exciting network of said one or more transformer exciting networks is electrically coupled at a customer terminal site.
15. A network as in claim 9 wherein said coil comprises category 5 Ethernet type telecommunication cable comprising tightly twisted wire pairs.
16. A method of routing digital subscriber line communication signals with a digital subscriber line induction neutralizing transformer network, said method comprising:
routing digital subscriber line communication signals between a backbone network and one or more remote terminals;
routing said digital subscriber line communication signals between one or more central offices and one or more digital subscriber line circuits;
receiving an induced voltage level and an excitation current;
supplying a first low impedance path-to-ground for said excitation current;
supplying a second low impedance path-to-ground for said excitation current;
neutralizing said induced voltage level in response to said excitation current using a digital subscriber line induction neutralizing transformer comprising;
a core; and
a coil electrically coupled to and wound around said core and comprising approximately 100-200 feet of approximately 24 gauge wire;
said core and said coil adding longitudinal inductance to a telecommunication line and reducing induced voltage levels at a non-digital subscriber line frequency on said telecommunication line;
wherein said digital subscriber line induction neutralizing transformer does not include a screen or shield to prevent crosstalk interference; and
routing said digital subscriber line communication signals to one or more customer terminals.
17. A method as in claim 16 wherein neutralizing said non-digital subscriber line frequency comprises adding approximately 6 to 25 Henries of inductance to said telecommunication line.