Patent Application
20130118294
Factories with equipment include controls over the equipment in order to prevent unauthorized modifications during use or during equipment shut downs. One example of control includes mounting electrical controls within an electrical enclosure. A mechanism is provided such that when the door handle is operated to open the door and access the control equipment, power to the equipment is disconnected, for example, with a disconnect switch.
In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural changes may be made without departing from the scope of the present invention. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims and their equivalents.
In an option, the handle assembly 120 is mounted on an electrical box 104 of the system 102. In an embodiment, the handle assembly 120, base assembly, and the shaft 150 are operably coupled with a disconnect system. The system includes the electrical box 104 and the handle assembly 120, where the handle assembly 120 is operably coupled with the disconnect switch or circuit breaker. The switch is operably and/or electrically coupled with one or more of industrial equipment, power supplies, motors, conveyors.
As shown in
The handle 122 is coupled with the rotator 124, and the rotator 124 includes a coupler 125. The coupler 125 provides a mechanical interconnect between the handle 122 and the shaft 150, and translates movement of the handle 122 and the rotator 124 to the shaft 150.
The handle assembly 120 further includes, as shown in
When the cover 142 is placed in the first position, the handle 122 can be rotated, in an embodiment, from the OFF position to the ON position, and vice versa. In the second position, the handle 122 cannot be moved. For example, if it is desired for the handle 122 to be locked in a particular position, such as the OFF position, the cover 142 is placed in the second position, and a locking member, such as a padlock, can be placed through the passage which forces the cover to remain the second position. When in the second position, as shown in
In an example, a method includes turning a handle of an assembly to an OFF position and locked position. The method further includes moving a cover from a first position to a second position, for example by overcoming a resilient force of a resilient member, the cover concealing at a portion of a locking fixation feature when the cover is in the first position. One or more portions of the cover are disposed within at least a portion of the base assembly in the second position and preventing rotation of the handle assembly relative to the base assembly with the one or more portions, revealing at least a portion of the locking fixation features when the cover is in the second position. In an embodiment, locking structure is disposed through at least a portion of the locking fixation features, such as a pad lock, and the handle of the handle assembly is locked in a particular orientation.
In one or more embodiments, the method further includes moving operable barriers of the base assembly, and moving the cover within the base assembly to lock the handle assembly in multiple handle orientations, moving operable barriers includes moving pivotable tabs and providing an opening in the base assembly to receive the cover therein.
The base assembly 170 is defined in part by a front portion and a rear portion. The rear portion of the base assembly 170 is mounted, in an embodiment, to a door of an enclosure (
The handle and rotator 124 are coupled through the front portion. On a rear portion of the handle assembly 120 is the rear housing including a socket 132, which is adapted to receive the shaft 150. In an option, the socket 132 has a tapered interior portion. The socket 132 receives the second end portion of the shaft therein, and directs the shaft to the coupling 125 of the rotator 124.
The base assembly including a housing 176, such as a front housing for the front portion 172 and a rear housing for the rear portion. The housing 176 includes an opening 178 therein. The opening 178 allows access to the defeater 190, which is disposed within the base assembly 170.
The defeater 190 includes a defeater catch 192 that interacts with the end portion of the shaft and can prevent longitudinal movement of the shaft relative to the handle assembly 120, depending on the orientation of the shaft 150, and can prevent opening of the enclosure by the handle assembly. The defeater catch 192 hooks with a component of the shaft, such as a catch of the shaft.
The defeater catch 192 is, in an embodiment, resiliently held in position by a spring member 195. The defeater and the defeater catch 192 toggle between one or more positions, such as, but not limited to a position in which the shaft is caught by the defeater catch to a position where the defeater catch does not block a path of the shaft. The defeater catch 192 of the defeater 190 can be overridden, and the shaft can be released from the catch 192. In an option, the defeater 190 is moved, for instance toggled, along an axis other than along a direction against pulling or pushing movement of the enclosure door to which the handle is coupled., or along movement of the enclosure door travel. In an embodiment, the defeater 190 moves along the direction indicated at 196.
The defeater 190 and defeater catch 192 can be overridden. An object such as an elongate member can be disposed though an opening 178 of the housing 176 of the base assembly and used to move against the resilient member to release the catch of the shaft from the defeater catch. In an embodiment, an operable defeater block 194, such as a shield disposed in a pocket of the base assembly. The defeater block 194 physically obscures the opening of the base assembly housing so that the elongate member cannot be disposed through the opening, and the defeater cannot be overridden. Access to the defeater external to the housing of the base assembly can be prevented. In an embodiment, the method includes inserting a defeater block for a defeater from an assembly including the handle assembly, turning a handle of the handle assembly to an OFF position and locked position, and preventing moving of the defeater and overcoming the lock.
A method of using the defeater includes turning a handle of the handle assembly to an OFF position and locked position, and moving the defeater and overcoming the lock. In one or more embodiments, moving the defeater and overcoming the lock includes toggling the defeater, moving the defeater includes pressing the defeater against a resilient member, moving the defeater includes disposing a member through an opening of the base assembly, and/or moving the defeater includes releasing a defeater catch from a catch of a shaft.
The shaft 150, for example, an elongate shaft, extends from a first end portion 152 to a second end portion 154. The first end portion 152 is adapted to couple and/or operably engage with a disconnect switch, for example within a power box, as shown in
The shaft 150 interacts with, and depending on the orientation, is engaged by the defeater catch 192. In an example, depending on the shaft 150 orientation, such as a first orientation, prevents opening of the electrical box or (
During use of the system 104, referring to
It is to be understood that the above description is intended to be illustrative, and not restrictive. Many other embodiments will be apparent to those of skill in the art upon reading and understanding the above description. It should be noted that embodiments discussed in different portions of the description or referred to in different drawings can be combined to form additional embodiments of the present application. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
