Abstract:
The present invention is a novel device having two primary components. The first component is a specialized collar and the second component is a feeder. The specialized collar has a pendant from which an activation magnet hangs. The feeder has a magnetic sensor which is placed in a location so as to sense the magnet from the collar. The feeder is in the open condition except when an animal wearing a specific magnet approaches a feeder, an activation mechanism causes a restriction mechanism to be placed over the food access so that the animal wearing the collar cannot have access to the food. When the animal goes away from the feeder, the restriction is removed so that other animals who do not have the collar will have access to the food.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to restriction of access to animal food, and, more particularly, to the mechanical restriction of access to food for small domesticated pets. 
     2. Description of the Prior Art 
     Pet owners are more conscious of the dietary needs of their pets. Whether it is by doctor&#39;s orders or by the initiative of the owner, more and more pet owners have the need to control the diet of their pets. When there are more than one pet in the home, a frequent problem is that one pet tends to also eat another&#39;s food. Whether the issue is preventing an overweight pet from eating the other&#39;s food or to ensure that one pet is getting all its allotment of its special diet, a need exists in the home to ensure that this occurs. 
     Controlled animal feeders are well known in the art and tend to fall into one of two categories, those pertaining to livestock and those pertaining to household pets. Of those pertaining to household pets, most employ complicated circuits using microprocessors and transmitters. 
     The following 14 patents and published patent applications are relevant to the field of the present invention. 
     1. U.S. Pat. No. 4,426,955 issued to Marvin E. Monroe et al. and assigned to Optek, Inc. on Jan. 24, 1984 for “Identification And Animal Feeding Apparatus” (hereafter the “Monroe Patent”); 
     The Monroe Patent is an automated livestock feeding apparatus having a plurality of magnetic tags each respectively suspended from a specific animal and having a specific code in the feeder which is detected by a plurality of spaced apart reed switches. The farmer programs the feeding apparatus such that when the sensor reads the magnetic tag around the animal&#39;s neck, the feeding apparatus will dispense a ration of fodder specific to that tag. The Monroe Patent is designed for very large livestock and not for small pets. 
     2. U.S. Pat. No. 4,655,170 issued to Daniel R. DaSilva on Apr. 7, 1987 for “Animal Identification Feed Control System” (hereafter the “DaSilva Patent”); 
     The DaSilva Patent is an involved device which discloses how to deliver a predetermined amount of feed to the livestock, with a readout for animal record keeping and system review. The DaSilva Patent is designed for very large livestock and not for small pets. 
     3. U.S. Pat. No. 5,570,655 issued to Anthony Targa on Nov. 5, 1996 for “Device For Controlling Animal Access To A Location” (hereafter the “Targa Patent”); 
     The Targa Patent prevents an animal from eating from the food bowl, by having that animal trigger an alarm or loud noise that frightens it away. 
     4. U.S. Pat. No. 5,669,328 issued to Tammy Lanfranchi on Sep. 23, 1997 for “Automatic Animal Feeding System” (hereafter the “Lanfranchi Patent”); 
     The Lanfranchi Patent teaches a very different structure, having a covered food dish with a triangular top with a closeable opening of sufficient size to allow an animal&#39;s head to enter to get access to the food dish. The animal that is permitted to eat from the dish wears a collar with a transceiver. When the animal comes in proximity of the dish, a mating sensor receives recognition from the transmitter and causes the triangular top to rotate so that the opening becomes uncovered to allow the animal to eat. 
     5. U.S. Pat. No. 6,044,795 issued to Taketoshi Matsuura et al. and assigned to Matsushita Electronics Corporation on Apr. 4, 2000 for “Automatic Feeding System Having Animal Carried Transmitter Which Transmits Feeding Instructions To Feeder” (hereafter the “Matsuura Patent”); 
     The Matsuura Patent is a food delivery system which dispenses a pre-programmed quantity of food into a feed bowl when it senses the animal&#39;s transmitter. The transmitter is implanted in the body of the animal. 
     6. United. States Patent No. 6,349,671 issued to Nan R.W. Lewis et al. on Feb. 26, 2002 for “Pet Feeding System And Method Of Using Same” (hereafter the “Lewis Patent”); 
     The Lewis Patent discloses four separate covered dishes with activation mechanisms that are programmed so that the dishes can open when the cat wearing a transmitter tag, which generates a radio signal, comes in proximity of the dish. The food dish is kept inaccessible to all animals until the desired cat&#39;s transmitter comes in proximity to the signal transceiver causing the food dish to open to allow the cat to eat. 
     7. United States Published Patent Application No. 2002/0134313 to Robert Andrew King on Sep. 26, 2002 for “System, Method And Apparatus For Controlling Animal Feeding” (hereafter the “King Published Patent Application”); 
     The King Published Patent Application discloses a covered feed dish that opens when it receives a radio signal from a transmitter on the animal. The feeding method can be programmed to not open except during certain hours. This transmitter may be implanted on the animal or permanently affixed to the animal, and may transmit data to the transceiver, such as whether the animal has already eaten that day. The covered feed dish includes a temperature control device to prevent spoilage and a spray device to chase animals away from the dish. 
     8. U.S. Pat. No. 6,651,584 issued to Karel van den Berg and assigned to Lely Research Holding A.G. on Nov. 25, 2003 for “Feed Metering And Animal Identification Device With Load Sensor And Closing Means” (hereafter the “&#39;584 van den Berg Patent”); 
     The &#39;584 van den Berg Patent discloses a feed metering device for distributing feed in metered portions to an animal. Based on information received from the animal&#39;s ID tag, the device weighs the fodder or drink and delivers a specific quantity of either food or drink to the animal. The device also monitors the amount of food the animal eats and how much fodder is left in the device. 
     9. United States Published Patent Application No. 2005/0061252 to Glenn Meeks et al. on Mar. 24, 2005 for “Pet Feeding Dish And Method” (hereafter the “Meeks Published Patent Application”); 
     The Meeks Published Patent Application discloses a pet feeding system wherein the system uses pulse width identification to provide a more effective identification of a unique signal from a remote circuit in a pet tag. Utilizing a sophisticated digital circuit, the device is capable of identifying more than one remote circuit such as two or more pets at the same time. A hopper holds extra food that is meted out and a flap will rise to allow the animal to eat. 
     10. U.S. Pat. No. 6,907,843 issued to Karel van den Berg and assigned to Lely Research Holding AG on Jun. 21, 2005 for “Feed Metering And Animal Identification Device With Load Sensor And Closing Means” (hereafter the “&#39;843 van den Berg Patent”); 
     The &#39;843 van den Berg Patent is the same patent as the &#39;584 van den Berg Patent, discussed above, but is a divisional application having different claims of invention with respect to the device. 
     11. United States Published Patent Application No. 2005/0217591 to Robert Michael Turner on Oct. 6, 2005 for “Animal Feeding Device And Method” (hereafter the Turner Published Patent Application”); 
     The Turner Published Patent Application discloses a hopper that is programmed to deliver a specific quantity of food based on information it receives from the animal&#39;s transmitter. This device maintains specific feeding schedules and specific diets for animals. 
     12. U.S. Pat. No. 7,051,674 issued to Karel van den Berg and assigned to Lely Research Holding AG on May 30, 2006 for “Feed Metering Device” (hereafter the “&#39;674 van den Berg Patent”); 
     The &#39;674 van den Berg Patent is again another division of the previously discussed &#39;584 van den Berg Patent having different claims of invention on the same concept. 
     13. U.S. Pat. No. 7,100,534 issued to Karel van den Berg and assigned to Lely Research Holding AG on Sep. 5, 2006 for “Feed Metering And Animal Identification Device Having Angularly Displaceable Weighing Means” (hereafter the “&#39;534 van den Berg Patent); 
     The &#39;534 van den Berg Patent is again another patent which has the same concept as &#39;584 van den Berg Patent but with different claims of invention. 
     14. U.S. Pat. No. 7,124,707 issued to Jennifer Ann Clarke on Oct. 24, 2006 for “Selective Animal Feeding Apparatus” (hereafter the “Clarke Patent). 
     The Clark Patent discloses the ability to have selective food access to a specific animal wearing a continuously emitting transmitter. 
     While the prior art has feeder devices for livestock have magnetic tags, those feeders are large, bulky, require programming and have expensive and delicate electronics. Prior art feeder devices for small domesticated pets also have expensive and delicate electronics. The use of these electronics is a significant problem. The relative fragility and expense of these electronics subject the equipment to frequent breakages, repairs, maintenance, and replacements. Additionally, all the prior art are designed to not allow access unless and until the right animal approaches, which means that if any of the electronics break down or are programmed incorrectly, no animal gets any food because the electronics will not dispense any food or allow any access if the electronics breaks down. Pet owners are not pleased at the constant expense for repairs and replacements nor at coming home to find that their pet has not had any food all day or all weekend. 
     There exists a need for a pet feeder that allows access to food unless and until an animal that should not partake of the food in the feeder approaches. There exists a need for a restricted access pet feeder that has the ability to adjust to the height and size of the animal, so as to grow with the animal. There exists a need for a restricted access pet feeder that has the ability to adjust the size of the opening where the food is. There exists a need for a restricted access pet feeder that eliminates expense and delicate electronic parts. There exists a need for a restricted access pet feeder that eliminates the necessity of having wireless transmitters which are much more expensive which is what most of the cat dishes have. There exists a need for a restricted access pet feeder for small animals that does not use transmitters or transceivers, or other devices which add to the expense and cost of manufacture, production, sales, and repairs of animal feeders. 
     SUMMARY OF THE INVENTION 
     The present invention resolves the problems of the prior art. The present invention does not utilize microprocessors, transmitters, transceivers or other delicate electronics. The present invention is designed with simplicity for small domesticated animals, with only one, seldom moving part. The present invention will not cause an animal to starve if the electronics break or fail. The present invention is inexpensive to manufacture and purchase and can be highly decorative. 
     The present invention is a novel device having two primary components. The first is a specialized collar and the second is a feeder. The specialized collar has a pendant from which hangs two magnets. The first magnet is weaker than the second magnet and is permanently affixed to the pendant. The second magnet is stronger than the first magnet and is affixed to the pendant by its magnetic attraction to the first magnet. This allows an animal wearing the specialized collar to release itself should the animal become magnetically attached to a fixed object, such as a refrigerator. The animal&#39;s natural pull will separate the first and second magnet from each other and release the animal. The second magnet will remain magnetically attached to the object until removed, after which the second magnet is preferably re-attached to the first magnet on the pendant of the specialized collar. This specialized collar is placed on the animal that should not eat from the feeder. 
     The feeder is preferably adjustable in height and head-width or available in various heights and head-widths. The feeder has an area in which the pet food is placed and having a default state of being open or available. The feeder has a magnetic sensor which is placed in a location so as to sense either the first magnet, the second magnet or both magnets on the pendant of the specialized collar. When the feeder senses the magnets of the specialized collar, a cover quickly, but safely, emerges from the interior of the feeder and covers the top of the food dish. Because the specialized collar is placed on the animal that should not eat from the feeder, the feeder will sense the near presence of this animal and prevent this animal from eating the food in the dish by placing the cover over the dish area. When the animal with the specialized cover moves away from the feeder, the feeder no longer senses the magnets of the specialized collar and the internal mechanisms revert to its default state and the cover recedes back into the interior of the feed, thereby uncovering the food. The feeder has an on/off switch so that the access restriction can be turned off and the feeder can be used for all feeding purposes. 
     First, it is an object to provide an animal feeder restricting access to the food which provides access for small domesticated pets. The present invention provides this feature. 
     Second, it is an object of the invention to provide an animal feeder restricting access to the food which activates only to disallow access of an animal to the food within the feeder. The present invention provides this feature. 
     Third, it is an object of the invention to provide an animal feeder restricting access to the food, which is adjustable in its height to correspond to the height of the specific animal anticipated to eat from the feeder. The present invention provides this feature. 
     Fourth, it is an object of the invention to provide an animal feeder restricting access to the food with an adjustable opening to allow a specific sized head to enter into the eating area so as to customize the feeder for a specific animal and to prevent animals with larger heads from being able to enter their heads in the eating area. The present invention provides these features. 
     Fifth, it is an object of the invention to provide an animal feeder restricting access to the food which is resilient to animal damage and abuse. The present invention provides this feature. 
     Sixth, it is an object of the invention to provide an animal feeder restricting access to the food, which is small, portable and easy to clean and care for. The present invention provides these features. 
     Seventh, it is an object of the invention to provide an animal feeder restricting access to the food, which is simple. The present invention is very simple to use, simple to manufacture, simple to repair, as well as convenient and easy to use. 
     Eighth, it is an object of the invention to provide an animal feeder restricting access to the food, which is inexpensive to manufacture and eliminates parts in the prior art. Prior art devices are complex, with multiple, varied contents, such as microprocessors, transmitters, transceivers, tracking devices, programmable devices, recording devices, digital memory, etc., all requiring varied systems of manufacture. Additionally, prior art that contains a multiplicity of parts, as well as complicated apparatuses disguised as another item are expensive to manufacture. The present invention eliminates parts in the prior art and is easy and inexpensive to manufacture since the main body is only one molded or formed piece. 
     Ninth, it is an object of the invention to provide an animal feeder restricting access to the food, which is inexpensive to purchase. Due to the size, simplicity and uncomplicated nature of the present invention, the present invention will be inexpensive. 
     Tenth, it is an object of the invention to provide an animal feeder restricting access to the food employing a simple circuit utilizing a magnetic switch, which is animal appropriate. Restricted access feeders for animals exist in the prior art, but do not take into consideration the size and needs of small domesticated animals, or more specifically, small cats, small dogs, kittens or puppies. The present invention is able to fit a particular small animal and can withstand being pushed or knocked against by small animals without damage to the circuitry or the body of the feeder. The present invention is designed with a hardy design. 
     Eleventh, it is an object of the invention to provide an animal feeder restricting access to the food which is durable. Feeders for livestock and domesticated pets which are made with microprocessors, transmitters, transceivers or which have many moving parts or parts that move frequently are fragile and will not last as long as feeders which do not contain sophisticated electronic devices or which have movement which is the exception to access rather than the requirement to access, thus requiring movement every time access is required. The present invention is durable. 
     Twelfth, it is an object of the invention to provide an animal feeder restricting access to the food which is durable, which is small and portable. Animal feeders for Storage and display devices which are designed to be hung on the wall or which are large and disguised as another item are not portable. Portability offers the advantage of flexibility of placement. The present invention is small and easily portable. 
     Thirteenth, it is an object of the invention to provide an animal feeder restricting access to the food which is marketable. With the rise in the pet health care, pet obesity, and increased awareness of animal needs, pet owners have become very active and very knowledgeable about the proper care and feeding of their pets. The present invention easily lends itself to the craft and scrap booking markets. Marketing slogans and packaging directed at veterinarians, kennels, pet hospitals, pet hotels, and pet would be very effective and salable. Additionally, there is an endless market for the present invention, as the pet population continues to grow and people continue to care for and pamper their pets. The present invention is salable, marketable and has an endless, non-seasonable market. 
     Fourteenth, it is an object of the invention to provide an animal feeder restricting access to the food which is novel. While other patents for restricted access animal feeders exist, the present invention device has several novel features, one of which is having the food area accessible by all animals, unless and until an animal that should not eat the food, approaches the animal feeder, so that if the electronics fail, the food is still available to the animal and the animals will not go hungry. Another novel feature is the release mechanism on the magnetic collar, which allows an animal to detach itself from an object, such as a refrigerator, should the magnet on the animal&#39;s collar become attracted to and attached to the object. The present invention is unique and novel over other animal feeders. 
     Fifteenth, it is an object of the invention to provide an animal feeder restricting access to the food that is appealing and desirable so that someone who sees one demonstrated by another person will want one too. The animal feeder of the present invention easily lends itself to decorative colors, designs, images, advertising and customization. Veterinarians and pet owners may place the animal feeder in locations that not only are practical and demonstrate the unique and novel functions and features of the animal feeder, but also display the decorative or advertising nature of the animal feeder. Other pet owners may see the animal feeders of their friends and envisage the very cute and customizable possibilities. The present invention is appealing and desirable. 
     Sixteenth, it is an object of the invention to provide an animal feeder restricting access to the food that is lightweight and small. Prior art devices are large, bulky and heavy. Kennel owners, veterinarians, and pet owners need to feed their animals at least once, if not more often a day. The prior art illustrates feeders that are heavy, bulky and too cumbersome to carry and clean. The present invention is made from a light weight molded plastic or polymer and the internal mechanisms are as simple and light weight as possible. Furthermore, the small and light weight nature allows the restricted access animal feeder to be located anywhere or easily tucked away. The present invention is lightweight, small and compact. 
     Seventeenth, it is an object to provide an animal feeder restricting access to the food which is reliable, reusable, operable, of good quality and useful in its own right. The use of the invention does not depend on others. The quality is high; the product is inexpensive, but not cheap. It is consistent, easy to operate and can be used again and again. The present invention has all of these features. 
     Further novel features and other objects of the present invention will become apparent from the following detailed description, discussion and the appended claims, taken in conjunction with the drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Referring particularly to the drawings for the purpose of illustration only and not limitation, there is illustrated: 
         FIG. 1  is a front perspective view of a preferred embodiment of the present invention illustrating the feeder apparatus in a non-restricted access position; 
         FIG. 2  is a front perspective view of a preferred embodiment of the present invention illustrating the feeder apparatus in a restricted access position; 
         FIG. 3A  is a depiction of use of a preferred embodiment of the present invention illustrating a front perspective view of the feeder apparatus in non-restricted access mode and a front perspective view of the collar around the neck of an animal at a distance at which the feeder apparatus is unable to sense the collar; 
         FIG. 3B  is a depiction of use of a preferred embodiment of the present invention illustrating a front perspective view of the feeder apparatus in restricted access mode and a front perspective view of the collar around the neck of an animal at a distance at which the feeder apparatus may sense the collar; 
         FIG. 4  is a rear perspective view of a preferred embodiment of the present invention having the back cover removed so as to illustrate the interior configuration and mechanisms of the feeder apparatus when the feeder apparatus is in non-restricted access mode; and 
         FIG. 5  is a rear perspective view of a preferred embodiment of the present invention having the back cover removed so as to illustrate the interior configuration and mechanisms of the feeder apparatus when the feeder apparatus is in restricted access mode. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Although specific embodiments of the present invention will now be described with reference to the drawings, it should be understood that such embodiments are by way of example only and merely illustrative of but a small number of the many possible specific embodiments which can represent applications of the principles of the present invention. Various changes and modifications obvious to one skilled in the art to which the present invention pertains are deemed to be within the spirit, scope and contemplation of the present invention as further defined in the appended claims. 
     Referring to  FIGS. 1 through 5 , there is illustrated a restricted access animal feeder  10 . The restricted access animal feeder  10  has two primary components: a feeder  30  and an activation mechanism  20 . 
     The activation mechanism  20  can take many forms but is illustrated here as a pendant  24  that hangs from a collar  22  by a suspension means  26 . The pendant  24  is attached to the collar  22  by an affixation means  25  which preferably slides along the collar  22 . At the free end of the pendant  24  are a first magnet  27  and a second magnet  28 . First magnet  27  is preferably permanently affixed to the suspension means  26 . Second magnet  28  is releasably attached to first magnet  27  by their respective attractive magnetic forces. First magnet  27  and second magnet  28  have magnetic forces that are strong enough to allow activation mechanism  20  to function operationally, but weak enough to detach from each other based on the pull of the animal. Should the second magnet  28  become attracted to and held by some other metal object, the animal may detach itself from this object, thus leaving second magnet  28  attached to the metal object. While the activation mechanism  20  works best with both first magnet  27  and second magnet  28  in place, it may still function operationally with only first magnet  27 . 
     Feeder  30  has a lower housing  41  which sets the height for the eating area  40 , generally contains and protects the inner mechanisms, such as electric motors  36  and  37  and a cover panel  38 , and provides general support for the structure and such items as a feed bowl  401  and shield  43 . 
     Feeder  30  has a cover panel  38 . While there are many means by which the cover panel  38  may be extended over or retracted from the eating area  40 , the simplest example is illustrated here as the cover panel  38  internally connected to a pair of electric motors  36  and  37 , which retract and extend the cover panel  38  over the eating area  40  located in the front  33  of the feeder. The cover panel  38  has a pair of fenders  35  which have the dual purpose of guiding the cover panel  38  in a straight manner during the extension and retraction of the cover panel  38 , and act as a further insurance that the cover panel  38  does not retract fully within the interior of the feeder  30 . 
     The eating area  40  is surrounded by a shield  43 . Additionally, a support bar  44  near the top of the open area above the eating area  40  adds cross support to the sidewalls of the shield  43 . The shield  43  prevents an animal from eating from the sides of the eating area, and the support bar  44  has the added benefit of preventing an animal from eating from the top of the eating area. Thus, the shield  43  and the support bar  44  provide that the only approach an animal may make to the eating area  40  is from the front  33  of the feeder  30 . Because the eating area  40  is only approachable from the front due to the position of the shield  43  and the support bar  44 , the animal  400  must place its head and neck in only one location from only one direction in order to reach the feed bowl  401  and eat. Due to the forced directional approach to the food bowl  401 , when the animal  400  approaches the eating area  40 , the pendant  24  on the collar  22  of the animal will be in close proximity to the front wall  34  of the feeder  30 . Accordingly, near the eating area  40  and along the front wall  34  is a sensor  39 . Sensor  39  is located in a position in the front of feeder  33  area on the front wall  34  in a manner that enables it to sense the pendant  24  on the collar  22  around the neck of an animal  400 , in particular, the sensor  39  senses either first magnet  27 , second magnet  28 , or both. The width of the shield  43  is preferably adjustable to accommodate a variety of animals and animals with large or small faces. The front wall  34  of the feeder  30  is preferably adjustable in height so as to accommodate, for example, a kitten as well as a full grown cat. Likewise, the sensor  39  may also be adjustable so as to properly sense the pendant  24  hanging from the collar  22  of a short animal or a tall animal. 
     Sensor  39  is comprised of two metal pins  39   a  and  39   b . When either magnet  27  or magnet  28  or both are in the near presence of sensor  39 , the magnets  27 ,  28  are attracted by the metal pin  39   a ,  39   b . This attraction will cause a magnetic switch to close the circuit to electric motor  36 . The internal circuits are designed so that when the sensor  39  detects the pendant  24 , the cover panel  38  is brought forward through a slot  48 , extending over the eating area  40 , thereby preventing the animal  400  wearing the collar  22  having the pendant  24  from eating from the feed bowl  401 . When the animal  400  with the pendant  24  moves away from the eating area  40  and the sensor  39  no longer detects the pendant  24 , the cover panel  38  retracts and the feed bowl  401  in the eating area  40  is uncovered, thereby allowing any animal not wearing the pendant  24  to eat from the feed bowl  401 . 
     The cover panel  38  is mounted on a cover panel platform  49 . The cover panel platform  49  supports and is mounted by the cover panel  38  by a transverse cross bar (not shown) that extends from the vertical guide  55  to the far end of the cover panel  38 . Transverse cross bar has a secondary purpose of being a double sided linear rack  52 . Vertical guide has wheels  56  to facilitate the movement to and fro within the interior of the upper housing  31  and to provide vertical stability during extension and retraction of the cover panel  38 . While it is preferred that at least one wheel  56  reside at the bottom of the vertical guide  55 , the present invention contemplates a variety of numbers, combinations, and locations of wheels  56  required to perform such facilitation. Here, as illustrated in  FIGS. 4 and 5 , vertical guide  55  has two pair of wheels  56 , one pair along the bottom of vertical guide  55  to roll along the base  32   a  of the platform area  32  and the second pair to roll along the ceiling  32   b  of the platform area  32 . Affixed to vertical guide  55  is a horizontal bar  57 . Horizontal bar  57  supports at least one bumper  58  to provide a smooth and quiet stop to the retraction movement of the cover panel  38 . At least one backstop  59  is provided for each bumper  58 . The at least one bumper  58  also serves to provide horizontal guidance and stability during the extension and retraction of the cover panel  38 . To facilitate the horizontal guidance, there is at least one bracket  60 . 
     There are illustrated in  FIGS. 4 and 5 , the feeder  30  as having two motors, electric motor  36  and electric motor  37 . Electric motor  36  is associated with the extension of the cover panel  38  over the eating area  40  and Electric motor  37  is associated with the retraction of the cover panel  38  from the eating area  40 . Each electric motor  36 ,  37  is operationally connected to a rotary gear  50  and  51 . Rotary gear  50  has a diameter equal to rotary gear  51 . Rotary gear  50  lies along one side of and meshes with the teeth of a double sided linear rack  52 . Rotary gear  51  lies along the other side of and meshes with the teeth along the other side of the double sided linear rack  52 . Rotary. gears  50  and  51  may freely move independent of their respective motors  36  and  37 , so that when rotary gear  50  is engaged by electric motor A  36  and is moving the double sided linear rack  52 , rotary gear  51  may freely rotate according to the movement of the double sided linear rack  52  without damage to or impedance from electric motor  37 , to which it is operationally connected. When rotary gear  51  is engaged by electric motor  37  and is moving the double sided linear rack  52 , rotary gear  50  may freely rotate according to the movement of the double sided linear rack  52  without damage to or impedance from electric motor  36 , to which it is operationally connected. 
     The circuits for electric motors  36  and  37  are designed in a manner that the circuit for each motor  36 ,  37  has two places where the circuit can be open. The first is at the magnetic switch, which is activated by the sensor  39 . The default condition for the magnetic switch associated with electric motor  36  is open and the default condition for the magnetic switch associated with electric motor  37  is closed. When the sensor  39  activates the magnetic switch because the pendant  24  is in close proximity, the default conditions of each circuit changes: the magnetic switch associated with electric motor  36  closes and the magnetic switch associated with electric motor  37  opens. The second location in the electric motors&#39;  36 ,  37  circuits where the circuit may be opened is at a second switch  53  and  54 . Second switches  53  and  54  are closed when their respective levers  53   a  and  54   a  are depressed. The default condition for lever  54   a , which is associated with electric motor  36  is in a closed position. The default condition for lever  53   a , which is associated with electric motor  37  is in an opened position. The second switches  53  and  54  can be located anywhere that facilitates the operation of the feeder  30 , but are here shown adhered to the brackets  60 . There are two appendages  53   b  and  54   b  which reside on the cover panel platform  49 . As the cover panel platform  49  moves to and fro within the upper housing  31  when it extends and oho retracts the cover panel  38 , the two appendages alternately and respectively pass over lever  53   a  and lever  54   a , thus closing or opening second switch  53  and second switch  54 . While cover panel platform  49  is generally symmetrical so as to interact with electric motor  36  and electric motor  37 , exceptions to the general symmetry exist for functional purposes. Examples of this is the location of the appendages  53   b  and  54   b  and the location of second switch  53  and second switch  54 . The second switches  53  and  54  are staggered so that only one circuit is completely closed at any one time, and, thus, either the circuit for electric motor  36  is completely closed and the cover panel  38  extends over the eating area or the circuit for electric motor  37  is fully closed and the cover panel  38  retracts. The appendages  53   b  and  54   b  are placed on the cover panel platform  49  such that when the cover panel  38  is fully extended over the eating area  40 , appendage A  53   b  depresses lever  53   a  and lever  54   a  is open. When the cover panel  38  is fully retracted, appendage  54   b  depresses lever  54   a  and lever  53   a  is left open. Thus, when either lever  53   a  is opened or when lever  54   a  is opened, the circuit associated with that motor is opened and the motor stops. In this manner, the length of the extension or retraction is controlled and the power supply  45 , which in this case is shown as two batteries, one for each electric motor  36 ,  37  circuit, is minimally used and power conservation is maximized. 
     The feeder  30  also has an on/off switch  46  attached to both circuits to further save on power and to use the restricted access animal feeder only when access does indeed need to be restricted. 
     Defined in detail, the present invention is a restricted access animal feeder, comprising: (a) an activation means comprising a pendant that hangs from a collar worn by an animal, the pendant affixed to the collar by affixation means, the pendant retaining a first permanent magnet which in turn retains a second permanent magnet, the second permanent magnet having a stronger magnetic force than the first permanent magnet so that if the second permanent magnet is attached to an object, a pulling force by the animal will cause the first permanent magnet to be released from the second permanent magnet; (b) a feeder comprising a housing having a means for retaining animal food, shield means to enable access to the food from only one location, adjustment means to enable the height of the means for retaining animal food to be raised or lowered, adjustment means to enable an area between the shield and the food retaining means to be increased or decreased, the housing retaining a movable cover which moves over the means for retaining animal food to prevent access to the food retaining means and is retractable back into the housing to permit access to the food retaining means, the movement of the cover created by a sliding mechanism connected to at least one electric motor which is connected to a magnetic switch; and (c) the housing having magnetic sensor means which is activated when the pendant having the two magnets is adjacent the housing, the sensor means causing the magnetic switch connected to a power supply to close when activated so that the electtic motor connected to the power supply is activated and activates means which causes the cover to move from one location in the housing to another location in the housing. 
     Defined more broadly, the present invention is a restricted access animal feeder, comprising: (a) an activation means comprising an attachment to collar worn by an animal, the attachment retaining a first permanent magnet which in turn retains a second permanent magnet, the second permanent magnet having a stronger magnetic force than the first permanent magnet so that if the second permanent magnet is attached to an object, a pulling force by the animal will cause the first permanent magnet to be released from the second permanent magnet; (b) a feeder comprising a housing having a means for retaining animal food, the housing retaining a movable cover which moves over the means for retaining animal food to prevent access to the food retaining means and is retractable back into the housing to permit access to the food retaining means, the movement of the cover created by a sliding mechanism connected to at least one electric motor which is connected to a magnetic switch; and (c) the housing having magnetic sensor means which is activated when the attachment having the two magnets is adjacent the housing, the sensor means causing the magnetic switch connected to a power supply to close when activated so that the electric motor connected to the power supply is activated and activates means which causes the cover to move from one location in the housing to another location in the housing. 
     Defined even more broadly, the present invention is a restricted access animal feeder, comprising: (a) an activation means comprising an attachment to collar worn by an animal, the attachment retaining at least one permanent magnet; (b) a feeder comprising a housing having a means for retaining animal food, shield means to enable access to the food from only one location, adjustment means to enable an area between the shield and the food retaining means to be increased or decreased, the housing retaining a movable cover which moves over the means for retaining animal food to prevent access to the food retaining means and is retractable back into the housing to permit access to the food retaining means, the movement of the cover created by a sliding mechanism connected to at least one electric motor which is connected to a magnetic switch; and (c) the housing having magnetic sensor means which is activated when the attachment having the at least one permanent magnet is adjacent the housing, the sensor means causing the magnetic switch connected to a power supply to close when activated so that the electric motor connected to the power supply is activated and activates means which causes the cover to move from one location in the housing to another location in the housing. 
     Of course the present invention is not intended to be restricted to any particular form or arrangement, or any specific embodiment, or any specific use, disclosed herein, since the same may be modified in various particulars or relations without departing from the spirit or scope of the claimed invention hereinabove shown and described of which the apparatus or method shown is intended only for illustration and disclosure of an operative embodiment and not to show all of the various forms or modifications in which this invention might be embodied or operated.