 Methods for diagnosing malfunctions in a disk drive |
| The present invention concerns methods used in disk drives for diagnosing malfunctions in the path ... |
|
| Gate array with bidirectional symmetry |
| The invention is an improvement in a CMOS gate array comprising a plurality of core cells. The core ... |
|
| Multiprocessor systems having distributed shared resources and deadlock prevention |
| FIG. 1 shows in block diagram a multiprocessor system in accordance with the present invention. T... |
|
| Apparatus and method for providing a transparent disk drive back-up |
| OF THE PREFERRED EMBODIMENT Having summarized various aspects of the present invention, reference ... |
|
| Method for preventing unauthorized modification of data in a device with a nonvolatile memory |
| It is accordingly an object of the invention to provide a method for preventing unauthorized data ... |
|
|
Method and apparatus for repairing fiber optic cable
| Details |
Inventors: Szentesi, Otto I.;
Assignee: Siecor Corporation (Hickory, NC)
Primary Examiner: Sikes; William L.
Assistant Examiner: Wise; Robert E.
Attorney, Agent or Firm: Moffitt; Roy B.
Disclosed is a method and apparatus for quickly joining one set of optical fibers to another set followed by permanent repair. The basic apparatus comprises two frames, each having a cross member containing a plurality of spaced apart optical fiber connectors; optical fibers optically connecting one connector in one frame to a corresponding connector in the other frame; at least one means in each frame to anchor a cable to the frame; and a bracket means attached to each frame between that frame's connectors and anchor means. A bare fiber adapter is also disclosed adapted to removably receive an optical fiber coaxially. On one end of the bare fiber adapter is a means affixed thereto for removably securing an optical fiber within the adapter. The repair method of a severed fiber optic cable involves the use of the above described apparatus as follows: Cable ends to be joined are stripped and secured in each frame. Bare fiber adapters are then removably secured to the terminal portions of the optical fibers of both cable ends sought to be optically connected to one another. Thereafter, the bare fiber adapters of one cable end are connected to the connectors of one frame and a like procedure carried out with the bare fiber adapters of the other cable end and frame to restore optical communication. After first routing traffic over other fibers, bare fiber adapters of a given fiber are removed and the fibers optically joined together in a more permanent fashion. When there is not enough slack in the damaged cable to join the fibers directly, a piece of spare cable has to be stripped and adhered to the frames to carry out permanent joining. Subsequently, the bare fiber adapters of the corresponding fiber sought to be permanently connected are removed and the fibers are permanently joined to each other in a predetermined manner. |
|
DETAILED DESCRIPTION Fiber optic cable is being used more and more in today's telecommunications systems.
One of the many reasons for this is that optical fibers are small, when compared to insulated copper wire conductors, and they are capable of simultaneously carrying many thousands of telephone calls (traffic) over a single fiber.
Metallic conductors of the same physical size can carry only a very small fraction of that number.
When a fiber optic cable is cut or broken, accidentally or otherwise, its inherent high capacity is disadvantage and not necessarily a blessing, because of the extremely large amount of telephone traffic either disrupted or completely lost.
Consequently, service over a fiber optic cable must be restored as soon as possible, even if the restoration is only temporary, so as to minimize telephone company lost revenue and customer irritation.
Furthermore, the subsequent permanent repair must be accomplished one fiber at a time in order that traffic over the other temporarily connected fibers is not affected.
It is towards this end that the disclosed invention is directed.
The invention contemplates a kit or device to be used by a telephone repair personnel in the field.
When a fiber optic cable is cut, broken or otherwise damaged, traffic over the damaged fibers is disrupted.
If there are undamaged fibers in the cable, then it is obvious that traffic can be diverted to those fibers while the repair of the broken fibers takes place.
On the other hand, as is more often the case, all or most of all of the fibers are damaged and it is imperative that some kind of service or repair be accomplished immediately so that traffic will not be lost and customer relations maintained.
In most instances there is not sufficient slack in the severed cable to directly join the fibers and a length of spare cable has to be inserted.
The apparatus of the invention comprises two frames, each containing a cross member on which there is mounted a corresponding plurality of spaced apart optical fiber connectors
|
| Related patents |
|
|
Protective device for overhead wires containing optical fiber units
What are claimed are: 1. Structure for connecting overhead earth wires containing an optical fiber unit, said optical fiber unit being disposed in the center of a bundle ...
|
|
|
Data processing system having interlinked slow and fast memory means
In accordance with the present invention, there is provided a data processing system having a large capacity first read only memory having a first access time, and a ...
|
|
|
Semiconductor memory having subarrays and partial word lines
I claim: 1. A semiconductor array memory comprising a plurality of selectable subarrays arranged on a chip having a common decoder, common read lines and common write ...
|
|
|
Flat-cell read-only-memory integrated circuit
OF THE PREFERRED EMBODIMENT A detailed description of the preferred embodiments of the present invention is described with reference to FIGS. 1-8. FIGS. 1-3 illustrate ...
|
|
|
Variable sized FIFO memory and programmable trigger level therefor for use in a UART or the like
In accordance with the illustrated embodiments, the present invention provides a data available interrupt circuit with a variable threshold for reading data from a ...
|
|
|
Apparatus for programmable circuit and signal switching
We claim: 1. A programmable interconnect device for routing signals between signal ports in response to data from an external controller, the device comprising: switch ...
|
|
|
Semiconductor memory device having hierarchical bit line structure employing improved bit line precharging system
Accordingly, a first object of the present invention is to provide a semiconductor memory device of a hierarchical bit line structure having a high read rate. Another ...
|
|
|
Dram core refresh with reduced spike current
The present invention makes multibank refresh more practical by varying the current profile for the row sense and/or row precharge currents during a refresh operation, ...
|
|
|
Shape memory alloy optical fiber switch
In FIG. 1, a switch is shown as a double pole switch. That is, two sets of fibers are switched and released at the same time. However, this is not a limitation of the ...
|
|
|
Semiconductor memory device with reduced inter-band tunnel current
Accordingly, it is a general object of the present invention to provide a semiconductor memory device which can satisfy the need described above. It is another and more ...
|
|
|
I/O Systems 
