Patent Publication Number: US-7211749-B2

Title: Electrical disconnect locking device

Description:
RELATED APPLICATIONS 
   This application is a continuation-in-part of, and claims the benefit of priority from U.S. patent application Ser. No. 10/865,453, filed in the United States Patent &amp; Trademark Office on Jun. 10, 2004, now abandoned which claims priority from U.S. Provisional Application Ser. No. 60/478,867, filed in the United States Patent &amp; Trademark Office on Jun. 16, 2003. 

   FIELD OF INVENTION 
   The present invention relates to an electrical disconnect locking device that is placed in-line between a house weather head and a power pole in order to connect and disconnect the flow of electrical current either by manual means or by remote control means. More particularly, the electrical disconnect locking device comprises a tamper proof housing with rotating plates than can be manually or electronically activated. When the rotating plates are locked in the contact position, electrical current flows freely. When the plates are rotated 90° to an unlocked position, the electrical current is interrupted and disconnected. The device is capable of self-locking in order to prevent unauthorized access. 
   BACKGROUND OF THE INVENTION 
   Currently, utility companies experience tremendous loss of both electricity and electric meters in blighted and impoverished areas due to theft. For example, when an electric customer receives a disconnect notice and fails to pay his electric bill, the utility provider sends a service person to the customer&#39;s home to disconnect the electric service. Typically, the service person cuts the seal on the meter, pulls the meter, places plastic spacers in the meter base, replaces and reseals the meter. However, the delinquent customer can easily re-connect the service by carefully cutting the seal, removing the plastic spacers and replacing the meter and seal so that it looks like nobody tampered with the meter. A period of days, or even months, can pass before the utility provider discovers that electricity is being stolen. At that point, a service person once again pulls the meter, inserts the plastic spacers and then locks the meter with a conventional locking device. 
   Numerous locking devices have been developed in order to try and prevent delinquent customers from opening electric meter bases and hot wiring the electricity. A most simple locking device is a brass locking ring, which easily can be removed with a pry bar. Other locks can be removed with conventional bolt cutters. When the delinquent customer is persistent enough, he will break any locking device secured to the meter and hot wire the meter base. A major problem with this type of electricity theft is that a potentially very dangerous situation is created by the wide open hot meter base. For example, a person can reach up and touch the hot meter base and be electrocuted. When the utility provider discovers that the delinquent customer is stealing electricity again, a service technician usually cuts the service wires at the weather head of the home. If this action does not deter the delinquent customer, the utility provider can disconnect service at the utility pole. However, disconnecting service at the utility pole is not an option when the same service cable serves several homes. At this point, the service technician has made four trips to the site of the delinquent user. 
   None of the prior art locking devices are completely effective in deterring theft of electricity because the conventional locking devices are designed to lock the meter base. Thus, a need still exists for a locking device which will connect and disconnect power at the weather head of a dwelling. The installation of such a device should deactivate the meter base and render the meter base cold. Also, such a device should discourage the delinquent customer from destroying the meter base or stealing the meter. Moreover, such a device should require only one trip by a service technician. In addition, such a device should leave the meter base cold in order to prevent injury or death. Further, such as device should save the utility provider money by preventing theft of electricity and loss of meters, which in turn can help lower utility rates. 
   SUMMARY OF THE INVENTION 
   Accordingly, it is an object of the present invention to provide an electrical disconnect locking device which is installed at the weather head of a dwelling in such a manner that electrical power can be connected and disconnected at the weather head. 
   It is another object of the present invention to provide an electrical disconnect locking device which will deactivate a meter base and render the meter cold. 
   It is also an object of the present invention to provide an electrical disconnect locking device which will discourage delinquent customers from breaking into meters and destroying meter bases. 
   It is a further object of the present invention to provide an electrical disconnect locking device which can be easily installed by a service technician. 
   Additional objects, advantages and novel features of the invention will be set forth in part of the description which follows, and in part will become apparent to those skilled in the art upon examination of the following specification or may be learned by practice of the invention. 
   These and other objects of the present invention are accomplished by providing an electrical disconnect locking device which is installed at the weather head of a dwelling and which comprises a tamper proof housing having rotating plates than can be manually or electronically activated. The rotating plates rotate between contact with two female couplings in a locked position and contact with two housing stops in an unlocked position. In the locked position, electrical current flows freely while in the unlocked position, electrical current is disconnected. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention will be better understood with reference to the appended drawing sheets, wherein: 
       FIG. 1  is a top view of the locking switch of the present invention. 
       FIG. 2  is a side view of the locking switch of the present invention. 
       FIG. 3  is a side view of a key configured to lock/unlock the locking switch of the present invention. 
   

   DETAILED DESCRIPTION 
   Referring to  FIGS. 1 and 2 , the locking switch  10  of the present invention comprises two non-conductive housings  11  joined or bound together by a housing link  12 . Each housing  11  and the housing link  12  is constructed from a non-conductive, weather-proof material and preferably is formed by a conventional molding process. Non-conductive, weather-proof materials suitable for use in the present invention include, for example, nylon and plastic materials. Each housing comprises a rotating plate  14  disposed within a concave cavity  15 , said rotating plate configured to rotate about 90°, a pair of female couplings  16 , two housing stops  13 , and preferably a condensate weep hole  29 . Each rotating plate  14  is composed of a conductive material that permits electrical current flow when in contact each the pair of female couplings  16 . 
   Each of the pair of female couplings  16  comprises a proximal end  16   a  which is fitted within the concave cavity  15  and a distal end  16   b  which is disposed within a channel opening  17  of the housing  11 . Proximal end  16   a  of each female coupling is designed to matingly contact said rotating plate  14 . Distal end  16   b  is configured to retain electrical wiring of different sizes, either by crimping or other connection methods well known in the prior art. A weather proof seal  17   a  can be provided at the channel opening. 
   A rotating shaft  21  is disposed centrally through both housings  11  and the housing link  12  and through each rotating plate  14 . The rotating shaft  21  is connected to each rotating plate such that is capable of rotating each of the rotating plates  14 . The shaft at the rotating plate connection can be of any suitable geometrical shape, such as square or rectangular, as long as the shaft is secured to the plate at the rotating plate connection. The shaft  21  is composed of a strong, non-conductive material. 
   In the embodiment shown in the Figures, shaft  21  is disposed in a longitudinal bore  20  which runs through the two housings  11 , link  12  and two rotating plates  14 , the bore terminating at each end through a snap ring  18  molded within each housing  11 . Each snap ring  18  is configured such that it can receive and retain a snap-on cap  19 . Preferably, each snap-on cap is composed of a weather proof material, such as rubber or hard plastic. 
   Shaft  21  comprises a first end  22  having a first configured shape  23  and a second end  24  having a second configured shape  25 . In the embodiment shown, first configured shape  23  is in the form of a pentagon and second configured shape  25  is in the form of a triangle. However, it is to be understood that any geometrical design is suitable for use for the first and second configured shapes. The first and second ends of the shaft  21  preferably are disposed within the molded snap rings  18  of the housings  11 . 
   Referring now to  FIG. 3 , a key member  30  is shown which is designed to lock and unlock electrical current in the locking switch of the present invention. The key member is composed of a strong, durable and non-conductive material. The key member  30  comprises a first arm  31  having a first arm end  32  and a second arm  35  having a second arm end  36 , the first and second arms being joined at first and second arm ends by means well known in the art, such as by a rivet. Preferably the first and second arms are joined with a spring-loaded connection  34 . 
   First arm  31  further comprises a key end  33  distal to said first arm end  32 ; second arm  35  further comprises a key end  37  distal to said second arm end  36 . Both key ends  33  and  37  are configured with a specific geometric shape corresponding to the first and second configured shapes  23  and  25 . More particularly, key ends  33  and  37  are designed as female complements to the configured shapes  23  and  25 . For example, in the embodiment shown in  FIGS. 1 and 3 , the first configured shape  23  is in the form of a pentagon and the key end  33  is in the form of a complementary female pentagon such that key end  33  can matingly engage configured shape  23 . Similarly, second configured shape  25  is in the form of a triangle and the key end  37  is in the form of a complementary female triangle such that key end  37  can matingly engage configured shape  25 . 
   In operation, the electrical disconnect locking device of the present invention is installed at the weather head of a dwelling and the connecting wires from the weather head are introduced into the distal ends  16   b  of the pair of female couplings  16  and retained therein by standard crimping methods. A service technician disconnects electrical current to the weather head by engaging key ends  33  and  37  of key  30  with the corresponding configured shapes  23  and  25  disposed at first and second ends  22  and  24  respectively of shaft  21 , turning shaft  21  to rotate each of the rotating plates  14  until each rotating plate contacts the two housing stops  13 . When the electrical service is to be re-initiated, each rotating plate  14  is rotated to the locked position whereupon it contacts the pair of female couplings  16  and the flow of electric current begins. 
   While particular embodiments of the invention have been described, it will be understood, of course, that the invention is not limited thereto, and that many obvious modifications and variations can be made, and that such modifications and variations are intended to fall within the scope of the appended claims.