Foaling alert method and apparatus
BACKGROUND OF THE INVENTION 
     While there have, in the prior art, been provided a number of labor or contraction monitoring devices, such prior devices have been relatively complex in construction and operation, extremely expensive to manufacture and maintain, and not generally suitable for foaling by mares. 
     SUMMARY OF THE INVENTION 
     Accordingly, it is an important object of the present invention to provide a foaling alert or signalling device and method which is extremely simple in construction and practice, relatively inexpensive to manufacture so as to economically justify disposal after a single use, and which effectively provides a remote alerting signal which enables a veterinarian or other person in attendance to go about other work in another location without monitoring the mare until the onset of foaling when the attendant&#39;s presence is desired. 
     It is still another object of the present invention to provide a foaling alert method and apparatus having the advantageous characteristics mentioned in the preceding paragraph, which is extremely simple to practice and use, being substantially foolproof in operation, and entirely reliable even under abusive conditions of use. 
     Other objects of the present invention will become apparent upon reading the following specification and referring to the accompanying drawings, which form a material part of this disclosure. 
     The invention accordingly consists in the features of construction, combinations and arrangements of parts and method steps, which will be exemplified in the following description, and of which the scope will be indicated by the appended claims. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a partial rear perspective view showing a mare having a foaling alert device associated therewith in accordance with the teachings and practice of the instant invention. 
     FIG. 2 is a perspective view showing the alert device, enlarged for clarity, apart from the mare and illustrating its separated or uncoupled alerting condition. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now more particularly to the drawings, and specifically to FIG. 1 thereof, there is shown a mare generally designated 10, in rear perspective view, the tail 11 being raised and exposing therebeneath the genital cavity or vulva 12. 
     Secured in position between opposite sides or external lips 13 and 14 of the vulva or genital cavity 12 is a signal or alert device 15 of the present invention. 
     More specifically, the alert device or signal means 15 is shown in greater detail in FIG. 2, as including a housing 16, which may be provided internally thereof with a self-powered radio frequency transmitter 17. That is, by conventional techinques there is mounted in the housing 16 a miniature wireless transmitter 17, there being also contained in the housing 16 suitable power supply means, such as a miniature battery, or the like. The housing 16 may be a stainless steel case, or other suitably rugged sanitary construction. One end of the housing 16, as at 20, may be provided with a recess or opening 21, within which may be a switch actuating element or pin 22. That is, the transmitter 17 is provided with an operating switch, which switch is of a normally closed type, and includes suitable actuating means such as pin 22 which may be operated, as by depression into recess 21 to open the normally closed transmitter on-off switch. Suitable antenna means, such as external band 25 about housing 16 may serve to radiate a radio signal. 
     Complementary to the transmitter housing 16 and its recess 21, in facing spaced relation with respect to the housing face or end 20, there may be provided a switch operator, generally designated 26, movable into and out of facing engagement with housing end 20. Further, the switch operator 26 may include a protrusion or boss 27 facing toward the transmitter housing end 20 and configured for conforming insertion into housing recess 21 to engage and depress switch actuator pin 22 to open the transmitter operating switch. Thus, the switch operator 26 is movable into facing engagement with housing end 20, the lug 27 entering into recess 21 and depressing pin 22 to maintain the transmitter in an off or deactivated condition. This is the condition shown in FIG. 1. 
     Suitable means may be employed for retaining the switch operator 26 in its transmitter deactivating position toward the housing 16, which means may yield to a forcible separation of parts. One advantageous embodiment of such separable retaining means may be that of fastener fabric elements, such as is commonly sold under the trademark &#34;Velcro&#34;, including a pile or loop fabric element and a hook fabric element for releasable holding interengagement of hooks and loops. 
     As best seen in FIG. 2, a pair of hook-type fastener fabrics 30 are secured in upwardly facing relation on the outer side or face of transmitter housing 16, as by adhesive or other suitable means. Secured to the switch operator 26 are a pair of complimentary pile-type fabric elements 31, extending beyond the switch operator for face-to-face complementary mating interengagement with respective hook fabric element 30 when the operator 26 is in position engaging the transmitter housing end 20 and entering recess 21. Thus, the complementary separable fastener fabric elements 30 and 31 serve to releasably retain the transmitter housing 16 and switch operator 26 in their fully engaged transmitter deactivated condition, while permitting of forcible separation to disengage switch operator 22 for activation of the transmitter. 
     Further, the fastener fabric elements 30 may be provided with attachment extensions or flexible sheet portions 32 extending away from the switch operator 26, which attachment extensions are adapted for attachment or securement to the mare on one side of the genital opening 12, say to one vulva lip 13, as by suturing 33 or other suitable securement means. 
     Similarly, the fabric fastener elements 31 are provided with flexible sheet extensions or attachment members 34 extending oppositely away from the housing 16 and adapted for suitable attachment to the other side of the genital cavity 12, say to vulva lip 14, as by sutures 35 or other suitable securement means. 
     Thus, by providing the hereinbefore described separable coupling elements 30 and 31, and associated transmitter and switch means 17, 22 and 27, secured to opposite sides of the female genital cavity in the coupled condition, all as illustrated in FIG. 1, the mare is prepared for foaling, whereupon a radio signal will be transmitted to a suitable remote receiver and alarm when it is essential for the attandant&#39;s presence. 
     From the foregoing it will now be understood that there is provided a method and apparatus for signalling the foaling of a mare, which is extremely simple in construction and operation, substantially foolproof in use, and does not in any way inhibit or disturb motion by the mare, and otherwise fully accomplishes its intended objects. 
     While the method and apparatus of the present invention have been primarily developed and employed for use with horses, and have been illustrated and described herein with particular reference thereto, it is appreciated that the instant invention is capable of use and advantageous results with many different animals, including cows, dogs and others, all of which uses are intended to be comprehended herein, the term &#34;foaling&#34; being considered to cover all such applications. 
     Although the present invention has been described in some detail by way of illustration and example for purposes of clarity of understanding, it is understood that certain changes and modifications may be made within the spirit of the invention.