1. Technical Field
The present disclosure relates to wiring devices, and in particular, to wiring devices having wire termination subassemblies.
2. Description of Related Art
Wiring devices are typically provided with device terminations for terminating electrical conductors/wires, for example, load terminations, line terminations, ground terminations, etc. Together these terminations, depending on the mechanical configuration, may be connected to electrical conductors/wires using several presently known termination techniques. One such termination is referred to as “side-wire” (sometimes referred to as “wrap-wire”) termination. To terminate a conductor/wire using a side-wire terminal, an end of the wire is initially stripped, exposing a portion of the end of the wire, and this exposed portion is then wrapped around a terminal screw. The screw is then tightened causing the head of the screw to secure the exposed wire between the head of the screw and a metallic terminal plate (e.g., a brass terminal).
Another type of wire termination is referred to as “back-wire” (also referred to as “clamp-wire”). In back-wire terminals, a screw passes through a first metallic plate and threads into a second metallic plate (referred to as a clamp) to compress a wire therebetween. The first metallic plate (or brass terminal) has a clearance opening and slides along the shaft of the screw. The second metallic plate has a threaded hole which the screw threads engage. A stripped wire is placed between the two metallic plates and the screw is tightened to compress the wire between the plates.
Yet another type of wire termination is referred to as a “push in” termination. Push-in terminations are terminals in which a small hole is available in the outer housing of a wiring device for insertion of a stripped wire therethrough. A solid-metal wire is initially stripped (e.g.—about five-eights of an inch) from the cut end. The stripped portion of the wire is inserted into the hole. A clamping mechanism, commonly in the form of a cage clamp, provides a clamping force on the wire to maintain it in contact with a terminal plate for establishing electrical contact with the wire. The clamping mechanism provides resistance against the wire being pulled out of the hole and out of contact with the terminal plate. Typically, a tool is required to release the wire; e.g., a screwdriver.
In view of the foregoing, it is desirable for wiring devices including termination mechanisms and methods of termination that provide convenient electrical terminations for various gauge conductors/wires.
The present disclosure relates to an electrical distribution wiring device comprising a housing having a plurality of wire terminations. At least one of the wire terminations comprises a conductive member and a lever. The conductive member is at least partially disposed within the housing. The lever is rotationally mounted to the conductive member and is manually rotatable between at least a first position and a second position. The lever includes a rotational axis and an eccentric surface defined with respect to the axis. When the lever is in the first position, the lever allows a wire to be inserted into the wire termination. When the lever is in the second position, the lever causes the eccentric surface to secure the wire to the conductive member.
In disclosed embodiments, wherein the conductive member includes a V-like shape having two legs configured to receive the wire.
In disclosed embodiments, the conductive member includes a resilient member formed therein; the resilient member, the lever and the conductive member are configured to interact with one another to allow securement of wires of different gauges with the conductive member.
In disclosed embodiments, all exposed surfaces of the electrical distribution wiring device which can be contacted by a human finger are electrically isolated from line voltage when the lever is in its second position.
In disclosed embodiments, the lever includes an element locking structure and the housing includes a housing locking structure. The element locking structure is configured to engage the housing locking structure when the lever is moved towards its second position.
In disclosed embodiments, the conductive member comprises a first terminal, a second terminal and a conductive member breakaway portion that connects the first terminal with the second terminal. The housing includes a housing breakaway portion, which is configured to at least partially shield the conductive member breakaway portion.
In disclosed embodiments, the lever is a hand operable lever.
The present disclosure also relates to a wiring device comprising a housing, and a wire termination subassembly. The wire termination subassembly is disposed at least partially within the housing. The wire termination subassembly comprises a conductive member and an element. The element is disposed in mechanical cooperation with the conductive member and is pivotable about a first axis between a first position where a wire is insertable between the element and a portion of the conductive member, and a second position where the wire is removably secured between the element and a portion of the conductive member. The element is manually movable between the first position and the second position.
In disclosed embodiments, the conductive member comprises at least one resilient member formed therein, wherein the at least one resilient member, the element and the conductive member mechanically cooperate to allow securement of wires having different gauges.
In disclosed embodiments, the element includes an element locking structure thereon which is configured to selectively engage a housing locking structure disposed on the housing when the element is moved towards its second position.
In disclosed embodiments, the element comprises a pivot portion and the pivot portion includes a reinforcing member.
In disclosed embodiments, the element is hand operable.
The present disclosure also relates to a wire termination comprising a conductive member and a lever. The lever is rotationally mounted to the conductive member and is manually rotatable between at least a first position and a second position. The lever includes a rotational axis and an eccentric surface defined with respect to the axis. The lever in the first position allows a wire to be inserted between the lever and the conductive member, and the lever in the second position causes the eccentric surface to secure the wire to the conductive member.
The present disclosure also relates to a wire termination comprising a conductive member and an element. The element is disposed in mechanical cooperation with the conductive member and is pivotable about a first axis between a first position where a wire is insertable between the element and a portion of the conductive member, and a second position where the wire is removably secured between the element and a portion of the conductive member/The element is manually movable between the first position and the second position.
The present disclosure also relates to a method for terminating a wire. The method comprises manually moving a lever to allow a portion of a wire to be inserted between a conductive member and an eccentrically cammed surface of the lever, inserting a portion of a wire between the conductive member and the eccentrically cammed surface of the lever, and manually moving the lever to removably secure the wire between the conductive surface and the eccentrically cammed surface of the lever such that the wire is manually removable from between the conductive surface and the eccentrically cammed surface of the lever.
The present disclosure also relates to a method of manufacture for an electrical termination of a wiring device. The method includes the step of mounting a conductive member at least partially within the wiring device where the conductive member includes at least one inwardly extending resilient member, a mounting region having at least a first width, and a wire-contact portion. The method also includes the step of mounting a wire termination mechanism within the mounting region of the conductive member. The wire termination mechanism has a shaft and is pivotable about the shaft between at least a first position and a second position. The wire termination mechanism is constrained within the at least first width of the mounting region by the inwardly extending resilient member, such that manufacturing tolerances are controlled.
Various embodiments of the present disclosure are disclosed herein with reference to the drawings, wherein:
FIG. 5AA is a perspective assembly view of the wire termination subassembly of the embodiment shown in
The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure are shown. This disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring initially to
With continued reference to
With reference to
With reference to
With reference to
With continued reference to
Referring now
In addition, a window or cutout region 127 is provided on the center of contact opposite the lever as opposed to a scoreline. The window 127 provides for two sharp corners or edges that engage the wire to be terminated instead of engaging the wire with a scoreline. The provision of windows 127 may be provided as opposed to the scoreline in order to simplify the manufacturing process.
As shown in the embodiment depicted in
With reference to
Referring back to
With reference to
When used herein, the term “tool-lessly” refers to a wire termination mechanism that may be actuated without the need or use of a tool or implement, e.g., hand-operable. This may include the ability to operate/actuate the wire termination mechanism both to secure a wire and to release a wire. However, it should be clear that the actuators of the wire termination mechanisms which are adapted and configured to be manually operable without the need or use of a tool or implement, may still be conceivably operated with a suitably selected tool or implement; i.e., tool-lessly operable wire termination mechanisms do not necessarily exclude manual operation by means of a tool or implement.
With continued reference to
Additional contemplated features of element 202 will now be described with reference to
Alternatively, in at least one embodiment, finger 260 may be omitted and instead the housing, or other suitable element, may be configured to limit or stop the lever near it's first position. If finger 260 is omitted, the termination may be configured such that the wire-accepting slot 125 is uninterrupted by the lever or a portion thereof at any point of the range of motion of the lever between it's first and second positions.
Referring back to
The present disclosure also relates to a wire termination subassembly 200 for use with a wiring device 100. The wire termination subassembly 200 includes a conductive member 120, and an element 202 disposed in mechanical cooperation with the conductive member 120. The element 202 is pivotable about a portion of the conductive member 120 between a first position where a wire is insertable between the element 202 and a portion of the conductive member 120, and a second position where the wire is secured between the element 202 and a portion of the conductive member 120. In disclosed embodiments, the element 202 is tool-lessly movable between its first position and its second position.
As can be appreciated, wire termination subassembly 200 facilitates the insertion and removal of a wire “W” with respect to wiring device 100. To secure a wire “W” into wire termination subassembly 200 of wiring device 100, a user (a licensed electrician, homeowner, or the like) can position lever 210 in its first, open position, insert a portion of wire “W” (e.g., a bare stripped portion of wire W) between cam 212 and conductive member 120, and move lever 210 towards its second, closed position, such that a portion of cam 212 moves towards the wire, thus firmly securing wire “W” between cam 212 and conductive member 120. To remove wire “W” from wire termination subassembly 200 of wiring device 100, the user moves lever 210 from its second, closed position towards its first, open position. This movement of lever 210 causes cam 212 to release wire “W,” such that wire “W” is free to longitudinally translate, thus allowing the user to remove the wire “W” from wiring device 100.
The illustrated embodiments of wiring device 100 show five separate elements 202. It is envisioned that each terminal 120a, 120b includes one element 202 associated therewith Additionally, while not explicitly shown, it is envisioned that wire termination subassembly 200 including element 202 can be used in combination with other types of wire termination subassemblies. Additionally,
The present disclosure also relates to a method of wiring an electrical device 100. The method includes the steps of providing an electrical device 100 including a conductive member 120 and an element 202, inserting a portion of a wire “W” such that a portion of the wire “W” contacts the conductive member 120, and tool-lessly moving the element 202 with respect to the conductive member 120 to secure a portion of the wire “W” in contact with the conductive member 120.
In various embodiments, the method may also include the following steps:
tool-lessly moving the element 202 with respect to the conductive member 120 to release the portion of the wire “W” from contact with the conductive member 120; and
tool-lessly removing the wire from the electrical device.
While several embodiments of the disclosure have been shown in the drawings and/or discussed herein, it is not intended that the disclosure be limited thereto, as it is intended that the disclosure be as broad in scope as the art will allow and that the specification be read likewise. Therefore, the above description should not be construed as limiting, but merely as exemplifications of particular embodiments.
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Number | Date | Country | |
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20100304596 A1 | Dec 2010 | US |