the above description will enable any person skilled in the art to make and use this invention . it also sets forth the best modes for carrying out this invention . there are numerous variations and modifications thereof that will also remain readily apparent to others skilled in the art , now that the general principles of the present invention have been disclosed . there has thus been outlined , rather broadly , the more important features of the invention in order that the detailed description thereof that follows may be better understood and in order that the present contribution to the art may be better appreciated . there are , of course , additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto . in this respect , before explaining at least one embodiment of the invention in detail , it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings . the invention is capable of other embodiments and of being practiced and carried out in various ways . also , it is to be understood that the phraseology and terminology employed herein are for the purpose of descriptions and should not be regarded as limiting . looking at fig1 it can be seen that the safety cane 2 has a hollow , perforated head 4 with a plethora of orifices 5 therethrough and a concave saddle 7 formed on it &# 39 ; s topmost surface . a first , removable , flexible , resilient sealing cap 8 frictionally engages the outer surface at the proximate end of the head 4 , and a second , flexible resilient , removable sealing cap 9 frictionally engages the outer surface at the distal end of the head 4 . an extendable shaft 6 extends normally from the head 4 , centered at the approximate longitudinal midpoint of the head 4 . the bottom end of the shaft has a flexible , grippable tip 10 frictionally engaged over the outer surface of the bottom end . the shaft 6 has a inner , lower member 12 that fits inside the outer middle member 14 . both members have a linear series of equally spaced penetrations 17 formed through their hollow tubular bodies that when aligned , allow for the insertion of a first spring button 20 through the aligned penetrations 17 of both the members so as to lock the shaft lower member 12 and middle member 14 in a desired length . such spring buttons that reside inside multi piece hollow tubular body assemblies of linearly extendable members are well known in the art . looking at fig2 and 6 it can be seen that at the top end of the shaft 6 , an upper member 16 having a semi - cylindrical , angled contour 22 cut into its uppermost end , is affixed normally to the head 4 by the insertion of the head stub shaft 24 into the internal recess 26 of the upper member 16 . the uppermost point of the angled contour 22 extends to the approximate linear midpoint of the head 4 , thereby allowing for the removal of the extendable shaft 6 . a second spring button 28 extends normally from the stub shaft 34 and locks the stub shaft 24 to the upper member 16 through penetration 17 in a similar fashion to the locking of the shaft lower member 12 and middle member 14 to a desired length as discussed above . in a door jamming operation , the concave saddle 7 of the head 4 of the safety cane 2 may be abutted adjacent to the bottom side of a conventional door knob and the shaft 6 extended such that the tip 10 reaches the floor while the linear axis of the shaft resides at an acute angle with the linear axis of the door . where non conventional door handles are used , the head 4 may be removed from the shaft 6 by depressing the second spring button 28 and extracting the stub shaft 24 , thereby exposing the angled contour 22 of the upper member 16 , which may be jammed under the door handle with the shaft 6 adjusted and placed substantially similar to that discussed above . the upper member &# 39 ; s angled contour 22 is approximately 1½ ″ in length and approximately 2¼ ″ wide between the two prongs . this has been found suitable to accommodate a wide variety of door handles . the head 4 internally houses several safety and convenience related articles . these are best explained by viewing fig3 , 4 , and 6 collectively . the interior of the head 4 houses a colored reflector 30 , frictionally constrained by the second cap 9 at the distal end ; a mace ( or equivalent ) spray canister 32 and a flashlight 34 constrained at the first cap 8 at the proximate end such that the mace canister spray tip 36 and release button 40 as well as the flashlight switch 38 and flashlight 34 extend partially therethrough the first cap 8 ; a portable gps device 42 ; an audible alarm device 44 and a electronic insect repeller 46 such that the alarm enabling mechanism 48 extends through one of the perforations 5 in the head 4 . with this configuration there is ample room remaining in the head 4 for the storage of medicine , documents , mp3 devices , knives , alert bracelets , whistles , pens , sunglasses , lotion , contacts and a plethora of other owner selected safety and convenience articles . the cane may be illuminated at night , used to send audible distress signals , used to defend oneself via pepper or mace spray , used to reflect approaching cars light back , used to deter insects , used to navigate via audible gps signals and of course to steady the walker . other items may be added to the cane handle tube that will enhance the personal safety of the user because of the advancement of micro - technology , which is likely to allow for increasingly smaller safety devices to be used within the head 4 . this coupled with the duo door jamming capabilities make this an indispensable aid for all . the materials of the safety cane &# 39 ; s construction will be lightweight yet strong and will encompass , aluminum , metal , and polymers . the head 4 is approximately two inches in diameter and six inches long . the first cap 8 and second cap 9 are approximately 2¼ ″× 1⅜ ″ and made of an appropriate material such as rubber , metal , or plastic , etc . the head 4 may be transparent , or opaque having a viewing window . the concave saddle 7 is approximately 2 ″ long × 1¼ ″ wide and may also have a soft rubber or rubber - like gripping surface . this beveled or recessed section is designed to grip under a doorknob to effectuate the door jamming function of the safety cane 2 . when using the safety cane as a walking aid , the user can also rest his / her hand in this recessed area . since the safety cane head 4 is removable this allows for user flexibility with the arrangement of the numerous components to be placed inside . removing the head 4 will also allow the user to utilize the cane 2 itself as a door jammer and to be able to use the internal components separately . note , that while the alarm enabling mechanism 48 is depicted as a button it is known that such devices commonly use a string attached to a releasable alarm pin . in such cases , the string may be secured around the walker &# 39 ; s wrist , while walking with the safety cane 2 . this allows the user to easily activate the alarm 44 if necessary . if the user loops the string snugly around the wrist ( recommended ), the alarm can be activated if the user falls or is in some way separated from the cane 2 . the gps device 42 may be used to locate the user of the safety cane 2 if they become lost . this is especially useful for elderly or mentally disabled safety cane users who may become disoriented . another optional gps device would allow the user to hear verbal directions as they navigate with the safety cane . a blank card such as a business card or smaller will be provided to the user for medical alert information such as illnesses or medications and identifying information . the card can easily be placed inside the head 4 and can be viewed through a transparent head 4 by anyone who is trying to assist the user of the safety cane 2 . all components located within said cane head 4 may be physically secured in place through the use of simple mechanical stops . since these will vary with the user &# 39 ; s choice of components these stops are simple polymer tabs that may be glued to the inner surface of the hollow cane head 4 . these are well known in the art and of numerous configurations , and as such have not been illustrated , although the commonest form would be a “ t ” formed from the normal intersection of a curved plate and a planar plate . as such , those skilled in the art will appreciate that the conception , upon which this disclosure is based , may readily be utilized as a basis for the designing of other structures , methods and systems for carrying out the several purposes of the present invention . it is important , therefore , that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention . any dimensions disclosed herein are not meant to be limiting but merely to demonstrate the preferred embodiment dimensions . although shown as a round tubular design , it can be of square , rectangular , oval or other geometric configuration . the material of construction may be a polymer , steel or metal and may be varied as required by the desired resilience and weight .
the present invention is a cane / walking aid that provides the user with many security features along with mobility support . the cane / walking aid can be placed under the doorknob to secure the door as a door - jamming device . the cane / walking aid will provide balance and mobility support . life - saving medical alert information will be readily available inside the cane / walking aid . a safety alarm will sound if the user pulls the alarm string , which is to be wrapped around the user &# 39 ; s wrist . this high - decibel alarm will also sound if the user becomes separated from the cane / walking aid . it also has a flashing safety light and a built in flashlight . the cane will have mace , an alarm , and / or other personal self - defense devices within . a g . p . s . device or a talking g . p . s . is provided for navigation . the cane / walking aid can accommodate an electronic insect repellent device .