fig1 a – 21 illustrate various aspects of a dual magnification folding travel mirror with annular illuminator according to the present invention . referring first to fig1 a – 8a , it may be seen that a dual magnification travel mirror with annular illuminator 20 according to the present invention includes a base 21 , an elongated , generally rectangularly - shaped handle 22 pivotably mounted at a lower end thereof to a front edge of the base by a handle pivot joint 23 , and a dual mirror assembly 24 telescopically mounted to an upper end of the handle . as shown in fig6 a – 9 , dual mirror assembly 24 includes a first , lower , or primary circular dish - shaped mirror frame 25 in which is mounted a first , lower or primary circular disk - shaped mirror 26 . as is also shown in those figures , dual mirror assembly 24 includes a second , upper or secondary circular plate - shaped mirror frame 27 in which is mounted a second , upper or secondary circular disk - shaped secondary mirror 28 . as shown in fig8 a and 9 , secondary mirror frame 27 is pivotably and swivelably coupled to primary mirror frame 25 by a dual joint hinge coupler 29 . as shown in fig7 a – 9 , hinge coupler 29 is joined to primary mirror frame 25 by a pair of circumferentially spaced apart , parallel lugs 30 l , 30 r which protrude chordally outwards from an upper peripheral portion 31 of primary mirror frame 25 . as shown in fig6 b – 6d , hinge coupler 29 includes a laterally symmetrically shaped body 32 which has a generally cylindrically - shaped lower bushing member 33 that fits between inner facing surfaces 34 l , 34 r of lugs 30 l , 30 r . bushing 33 has disposed laterally through its length a bore 35 which is coaxially aligned with and rotatable with respect to a transversely disposed pivot axle 36 which is disposed through the bore and which is fixed at opposite longitudinal ends thereof in bores 37 l , 37 r through lugs 30 l , 30 r . body member 32 of hinge coupler 32 includes a generally rectangularly - shaped , laterally elongated boss 38 which protrudes radially outwardly from lower bushing portion 33 . boss 38 has an upper surface 39 which lies in a plane above transverse pivot axle 36 and has protruding perpendicularly downwards into upper surface 39 a swivel pin bore 40 which is disposed perpendicularly to and radially outwardly from the transverse pivot axle , midway between opposite transverse sides 41 l , 41 r of bushing member 33 located at opposite longitudinal ends thereof . swivel bore 40 rotatably holds a swivel pin 42 which protrudes radially outwardly from a lower edge 43 of upper , secondary mirror frame 27 . with this arrangement , secondary mirror frame 27 is pivotable above transversely disposed pivot axle 36 , and swivelable in orthogonally disposed , radial swivel pin bore 40 , as shown in fig8 and 10 . as shown in fig6 a , 7 a , 7 d , 8 b , and 8 c , primary mirror frame 25 includes in an outer peripheral portion which borders primary mirror 26 a rearwardly or inwardly concave annular ring - shaped lamp channel 44 in which is mounted a circular ring - shaped , tubular lamp 45 , which is preferably a cold - cathode , fluorescent lamp . as shown in fig6 a , 8 a , and 8 b , lamp channel 44 has a generally flat , annular , ring - shaped cover window 46 which has light transmissive and preferably partially light - diffusive . in a preferred embodiment , primary mirror 26 has a concave , spherically - shaped reflective surface 47 which has a radius of curvature selected to yield a desired magnification factor , e . g ., between about 5 × and about 9 ×. although the dimensions of lamp channel 44 are not critical , the radial width of the channel in an example embodiment of travel mirror 20 was about ¾ inch . as shown in fig6 a , 7 a and 7 b , primary mirror 26 is mounted within a rearwardly concave , generally spherically contoured cavity 48 formed in the front surface of primary mirror frame 25 , concentrically located with respect to lamp channel 44 , by any suitable means , such as thin strips of tape 49 coated on both sides with a pressure sensitive adhesive and located between an outer annular portion 50 of rear surface 51 of the mirror , and an annular shoulder ledge 52 which protrudes radially inwardly of the outer circumferential wall of the cavity . as shown in fig6 a and 7b , shoulder ledge 52 is recessed inwardly or rearwardly of outer circumferential edge 53 of primary mirror frame 25 , sufficiently far to locate the front surface 54 of primary mirror 26 inwardly or rearwardly of annular lamp channel cover window 46 , thereby preventing contact between the front surface of the primary mirror with the front surface 55 of secondary mirror 28 , when secondary mirror frame 27 is pivoted to overlie the primary mirror , as shown in fig1 . referring to fig6 a , it may be seen that secondary mirror 28 has a circular shape , and may have a spherical concave surface which has a different radius of curvature than that of primary mirror 26 , but preferably has less curvature and thereby a smaller magnification factor . in a preferred embodiment , mirror 28 has an infinitely large radius of curvature , i . e ., is flat , and thus has a “ 1 ×” or unity magnification factor . as shown in fig6 a , 7 e , 7 f , and 11 , secondary mirror frame 27 has a shape approximating that of a thin circular plate which has a flat front surface 56 and a convex , arcuately curved rear surface 57 which has a slight curvature . front surface 56 of secondary mirror frame 27 has formed therein a concentric , circular shallow recess 58 which has a circular bottom wall 59 and a cylindrically shaped peripheral wall 60 . recess 58 has an outer circumference 61 sufficiently smaller than that of the outer circumferential edge 62 of secondary mirror frame 27 to form therebetween an annular ring - shaped bezel 63 which has a radial width approximately equal to or slightly less than that of annular ring - shaped cover window 46 of primary mirror frame 25 , e . g ., about ⅝ inch . according to the invention , at least bezel portion 63 of secondary mirror frame 27 is made of a light transmissive material . in a preferred embodiment , frame 27 is fabricated as a unitary molded part from a transparent material such as a polycarbonate or acrylic polymer plastic . secondary mirror 28 is retained within recess 58 of frame 27 by any suitable means , such as pressure sensitive adhesive 64 between rear surface 65 of the secondary mirror and upper surface 66 of bottom wall 59 of the recess . referring to fig6 a , 7 e , and 7 f , it may be seen that secondary mirror frame 27 has a sector - shaped notch formed in outer circumferential edge 62 thereof , thereby forming a straight edge wall 67 lying along a chord of the outer circumferential edge , the edge wall being bisected by a radius of the frame . chordal edge wall 67 of secondary frame 27 has a flat outer peripheral surface 68 which is perpendicular to flat front surface 56 of the frame , and has protruding radially inwardly therefrom a tapered bore 69 in which is fixed swivel pin 42 . as explained above , the outwardly protruding , lower portion 42 of swivel pin 42 is rotatably held within swivel bore 40 of hinge coupler 29 . fig1 a – 21 4 , 5 and 9 – 14 illustrate details of base 21 , handle 22 , and handle pivot joint 23 of travel mirror 20 according to the present invention . as shown in those figures , base 21 preferably includes an upper upwardly concave base half shell 70 , and a lower 27 downwardly concave base half shell 71 , each of which has in plan view a longitudinally elongated oblong shape with arcuately curved transverse end walls . thus , upper half shell 70 has an upper wall 72 which has protruding downwardly therefrom a flange wall 73 which includes straight left and right parallel longitudinally disposed side wall segments 74 , 75 and front and rear convex arcuately curved transverse end wall segments 76 , 77 , respectively , which are each symmetrically shaped about a longitudinal vertical center plane of the base , and symmetrically shaped with respect to one another through a transversely disposed central mirror plane of the base . similarly , lower base half shell 71 has a lower base wall 82 which has protruding upwardly therefrom a flange wall 83 which includes straight left and right parallel longitudinally disposed side wall segments 84 , 85 and front and rear convex arcuately curved transverse end wall segments 86 , 87 , respectively , which are each symmetrically shaped about a longitudinal vertical center plane of the base , and symmetrically shaped with respect to one another through a transversely disposed central plane of the base . as shown in fig5 and 6e , upper half shell 70 has formed in upper surface 72 u of upper wall 72 thereof a relatively wide , longitudinally elongated rectangularly - shaped handle groove 87 located centrally between left and right side walls 74 , 75 of the upper half shell . referring now to fig9 – 14 , it may be seen that upper and lower half shells 70 , 71 have inner concave spaces 90 , 91 , respectively , which , when the half shells are fastened together , form an elongated hollow interior space 92 . concave inner space 90 of upper half shell 70 contains a battery compartment 93 which is adapted to hold four aa dry cells connected in series with a pair of positive and negative output lead wires 94 , 95 which are connected in parallel with a battery eliminator jack 96 mounted in a vertically opposed pair of upper and lower slots 97 , 98 of upper and lower half shells 70 , 71 , the jack protruding rearward through upper and lower u - shaped half apertures 99 , 100 in rear transverse end walls 77 , 87 , respectively , of the upper and lower half shells . positive and negative output lead wires 94 , 95 are also connected through a switch 101 to power input terminals of a d . c .- a . c . inverter 102 , which has a pair of high - voltage a . c . output lead wires 103 , 104 which thread through the bore 105 of a diametrically split axle bushing 106 located at a transverse end of a handle pivot axle 107 located at the lower end of handle 22 , and thence to electrodes 108 , 109 of lamp 45 . as shown in fig2 and 12a , bottom half shell 71 of base 21 has a longitudinally disposed battery compartment access door 110 frictionally held within a longitudinally elongated , rectangularly shaped battery compartment access port 111 by a resilient plastic folded leaf - shaped self - spring latch 112 molded integrally with the access door , which is vertically aligned with battery compartment 93 . preferably , base wall 82 of lower half shell 71 also has through its thickness dimension a pair of longitudinally spaced apart , front and rear laterally disposed mounting holes 113 f , 113 b which each have generally circularly shaped center portion 114 and a pair of diametrically opposed radially outwardly protruding , mirror symmetric slots 115 for slidably receiving the shank of mounting screw ( not shown ) screwed into a wall which has a head ( not shown ) insertable into the center portion of the mounting holes , thereby enabling travel mirror 20 to be removably mounted onto a wall by a pair of vertically disposed screws . referring to fig1 a - 14 , it may be seen that handle pivot axle 107 located at a lower end portion of handle 22 has a generally cylindrical shaped major body portion 116 which is disposed transversely between opposite left and right vertical sides 117 l , 117 r of the handle . pivot axle 107 includes at one side of , e . g ., the left side , a bushing 106 of smaller diameter than body 116 of the axle which protrudes axially , i . e ., perpendicularly outwards from left transverse face end 119 of the axle body . also , pivot axle 107 has protruding from an opposite , e . g ., right transverse side thereof , a cylindrically shaped boss section 120 which has a diameter approximating that of main axle body 116 . cylindrical boss section 120 of axle 107 has formed in outer cylindrical wall surface 121 thereof a rectangular cross - section , circumferential annular groove 122 , an inner transverse end wall 123 of which is located adjacent to right vertical side wall 117 r of the handle . boss section 120 also has a cylindrically shaped axially outwardly located end portion 124 which extends from an outer transverse end wall 125 of groove 122 . outer cylindrical end portion 124 of right - hand cylindrical boss section 120 of handle pivot axle 107 has a transversely disposed , outer circular end face 125 , which has protruding perpendicularly outwards therefrom a concentrically located stud 126 which has a generally rectangular transverse cross section . referring still to fig1 a - 14 , it may be seen that upper and lower base half shells 70 , 71 have formed in front portions of inner opposed concave faces 127 , 128 thereof transversely disposed , generally semi - cylindrically shaped upper and lower grooves or channels 129 , 130 , respectively , which , when the half shells are secured together , form a generally cylindrically - shaped cavity 131 for rotatably receiving cylindrically - shaped handle pivot axle 107 . thus , as shown in fig9 – 11 , lower base half shell 71 has protruding upwardly from lower base wall 82 thereof a laterally centrally located , generally semi - cylindrically - shaped pivot axle groove 132 which has a front upper wall 133 adjacent to front transverse end wall 86 of the base shell . pivot axle groove 132 has a rear edge wall comprised of a thin , arcuately curved web 134 which protrudes upwardly from the upper surface 135 of lower base wall 82 , and a lower wall surface 135 comprised of a semi - cylindrically contoured groove formed in the upper surface of the lower base half shell . as shown in fig1 h , lower curved wall surface 135 of semi - cylindrical pivot axle groove 132 preferably has protruding downwardly therefrom a laterally elongated , rectangularly - shaped shallow recess 136 in which is mounted a rectangularly - shaped friction pad 137 that is made of a material such as silicone rubber which has a relatively large surface coefficient of sliding friction . as shown in fig1 h , pivot axle groove 132 has left and right u - shaped , transverse end journals 138 , 139 located at left and right ends thereof , respectively , of the groove . the end journals 138 , 139 are comprised of generally uniform - thickness , transversely disposed u - shaped webs 140 , 141 which protrude perpendicularly upwards from upper surface 135 of lower base wall 82 of lower half shell 71 . left and right end journals 138 , 139 have formed in upper surfaces thereof left and right downwardly concave semi - cylindrically - shaped grooves 142 , 143 which are of a suitable size and lateral spacing from one another to rotatably receive the left - hand bushing 106 and right - had groove 122 of right - hand cylindrical boss section 120 , respectively , of handle pivot axle body 116 . as is also shown in fig1 h , lower base half shell 71 also includes a generally semi - cylindrically shaped , axial friction control groove 144 which is adjacent to the outer , right - hand transverse face 145 of right - hand handle pivot axle body journal 139 . friction control groove 144 is coaxially aligned with lower semi - cylindrical pivot axle groove 132 , and preferably of smaller diameter and length . also , friction control groove 144 has located at a right transverse end thereof a short semi - cylindrically shaped nut holder groove 146 which has a polygonal transverse cross - section and which is adapted to irrotatably hold a hex nut 147 . nut holder groove 146 has an outer , right - hand transverse end journal 148 which has the form of a u - shaped web 149 that has in an upper surface thereof a groove 150 adapted to rotatably receive the shank 151 of a friction adjustment screw 152 which has located at the outer end thereof , a fluted friction - adjustment knob 153 . also , the inner , left - hand transverse end of nut holder groove 146 is bordered by a u - shaped left - hand end journal 154 comprised of u - shaped web 155 which protrudes upwardly from upper surface 135 of lower base wall 82 of lower half shell 71 . left - hand nut groove journal 154 has formed in upper surface 156 of web 155 thereof a downwardly concave semi - cylindrically shaped groove 157 which is of a suitable size to provide clearance for and therefore allow free rotation of screw shank 151 . referring still to fig1 h it may be seen that outer , left - hand transverse face 158 of left - hand nut groove journal 154 has protruding axially outwards therefrom a pair of generally rectangularly - shaped , vertically disposed front and rear end spacer ribs 159 f , 159 b , which are spaced equal distances radially outwards from front and rear sides of journal groove 157 . outer , left - hand face 158 of left - hand nut groove journal 158 also has protruding axially outwards from a lower base portion thereof a low , rectangular cross - section , slider rib 160 which protrudes upwardly from the center of lower semi - cylindrical wall surface 161 of friction control groove 144 . as shown in fig9 and 10 , slider rib 160 protrudes upwardly into a longitudinally disposed lower groove 162 l formed in the outer cylindrical surface 163 of a cylindrically - shaped slider bushing 165 which is longitudinally slidably located in axial friction control groove 144 . as shown in fig1 a – 14 , slider bushing 165 has formed in outer cylindrical surface 163 thereof upper and lower longitudinally disposed , diametrically opposed , rectangular cross - section grooves 162 u , 162 l , respectively . slider bushing 165 has a transversely disposed circular , flat outer or right - hand end face 166 , and a circular left - hand transverse face in which are formed axially inwardly protruding rectangular cross - section vertically disposed transverse grooves 167 u , 167 l which are continuous with upper and lower longitudinal grooves 162 u , 162 l , and a pair of radially disposed front and rear transverse grooves 168 f , 168 b which are perpendicular to the vertically disposed grooves . all of the above - identified end face grooves radiate from a coaxially centrally located blind bore 169 which protrudes inwardly from outer , left - hand transverse face 170 of slider bushing 165 . bore 169 is provided for receiving stud 126 which protrudes outwardly from boss 120 of handle pivot axle 107 . the function of end face grooves 167 u , 167 l , 168 f , 168 b is to facilitate elastic deformation of bushing 165 in response to longitudinal forces exerted on the bushing . as shown in fig1 a – 14 , friction control groove 144 longitudinally slidably holds in axial alignment with slider bushing 165 a circular rubber washer 171 , which is preferably sandwiched between a pair of outer and inner circular plastic washers 172 o , 172 i , all of which have a diameter approximating that of the slider bushing and slightly less than that of the friction control groove . each of the washers is provided with central coaxial through - bore . the inner transverse face 173 i of inner plastic washer 172 i adjacent to outer circular end face 126 of right - hand cylindrical boss section 120 of handle pivot axle 107 is pressed against the right - hand end face of the handle axle boss section with an axial force which is adjustable by turning friction control knob 153 . turning friction control knob 153 in a direction which advances friction adjustment screw shank 151 towards the handle pivot axle increases the axial frictional force exerted on the pivot axle to resist pivotable motion of the handle relative to the base ; turning the control knob in the opposite direction retracts the screw shank to thereby reduce frictional resistance to pivotable motion of the handle . referring to fig1 a – 14 , it may be seen that upper base half shell 70 has formed therein an upwardly concave generally semi - cylindrically shaped , transversely disposed upper half shell channel 129 that has several structural elements which have shapes complementary to those of elements of the lower half shell which were identified and described above . those upper and lower structural elements are mirror symmetrical through a horizontally disposed joint plane between upper and lower base half shells 70 , 71 and cooperate to form generally cylindrically shaped cavities . thus , for example , upper base half shell 70 has left and right transverse end journals 188 , 189 , which mate with lower base half shell journals 138 , 139 , the semi - cylindrically shaped grooves 142 , 143 of the lower journals mating with semi - cylindrically shaped grooves 192 , 193 of the upper half shell journals to form closed , cylindrically shaped pivot axle body end journals 292 , 293 , respectively . similarly , upper base half shell 70 has formed therein an upper semi - cylindrically shaped friction control groove 194 which forms with lower semi - cylindrically shaped friction control groove 144 of lower base half shell 71 a cylindrically shaped friction control cavity 293 . upper base half shell 70 also includes a semi - cylindrically shaped upper nut holder groove 196 which is bordered on right and left ends thereof by right and left upper nut groove journals 198 , 204 , forming with corresponding lower right and left journals 148 , 154 , respectively , a closed , cylindrically shaped nut holder cavity 296 . referring still to fig1 a – 14 , it may be seen that upper base half shell 70 has protruding downwardly from the upper inner surface thereof spacer ribs 209 f , 209 b and a slider rib 210 which are mirror images of ribs 159 f , 159 b , and 160 , respectively , of lower base half shell 71 . as shown in fig1 a – 14 , upper base half shell 70 has protruding rearwardly from front edge wall 221 thereof an elongated , rectangularly - shaped notch 222 which is laterally symmetrically located with respect to the left and right side walls 223 l , 223 r of the upper half shell . with upper and lower base half shells 70 , 71 fastened together , notch 222 is vertically aligned with semi - cylindrically shaped pivot axle groove 132 , and enables handle pivot axle 107 to rotate from an angular orientation in which handle 22 is received in handle groove 87 in the upper surface of the upper half shell , in a compact storage / transit configuration , to an upright use configuration in which the handle is angled upwardly from base 21 , as shown in fig1 and 14 . fig1 a through 21 illustrate structural elements of mirror device 20 which enable telescopic adjustment of dual mirror assembly 24 of mirror device 20 to a desired height relative to base 21 . as shown in those figures , handle 22 of mirror 20 has a vertically elongated , generally rectangular plan - view front portion 224 which has a shape approximating that of rectangular cross - section channel member or shell which includes a front vertically elongated rectangular front base plate member 225 , and rearwardly protruding left and right flange walls 226 l , 226 r . front handle portion 224 has a rearwardly curved , transversely disposed lower end portion 227 which is coextensive with front , upper half 228 of handle pivot axle 107 . also , handle 22 has a rear rectangular plate - shaped panel 229 which is secured within a longitudinally disposed channel 230 in the rear side of front handle shell 224 , and has located at a lower end thereof a transversely disposed , generally semi - cylindrically shaped extension 231 which mates with semi - cylindrically shaped lower end 227 of front handle shell 224 to form cylindrically - shaped handle pivot axle 107 . handle 22 fits telescopically slidably within an elongated rectangular bore 232 within an elongated generally rectangularly - shaped handle boss tube 233 which protrudes rearwardly from rear surface 234 of primary mirror frame 25 , the handle boss extending vertically along a diameter of the mirror frame , centered on a diameter thereof . as shown in fig6 a , 7 a – 7 d and 15 – 19 , bore 232 of handle boss tube 231 has mounted in a front or bottom longitudinally disposed base wall thereof a generally rectangularly - shaped , longitudinally elongated detent plate 235 . detent plate 235 has located in rear surface 236 thereof a plurality of a longitudinally spaced apart , laterally disposed detent grooves 237 . as is also shown in fig1 a and 16 , front base plate member 225 of front handle shell 224 has an upper transversely disposed edge wall 238 which has protruding perpendicularly inwardly therefrom a pair of parallel , longitudinally disposed left and right slots 239 l , 239 r which are spaced equal distances to the left and right , respectively , of a longitudinally center plane of the handle shell . slots 239 l , 239 r form therebetween a rectangularly - shaped tab 240 , which is flexibly and resiliently joined at a rear transverse edge 241 thereof to a longitudinally inwardly located portion of the front base wall plate 225 by an elastically deformable self hinge 242 , resulting from front wall plate 225 being made of an elastically deformable polymer such as polypropylene . tab 240 has protruding downwardly or forwardly from a front edge wall 243 thereof a laterally disposed , radiused detent rib 244 . detent rib 244 is of the proper size and shape to snap resiliently into a particular one of detent grooves 237 that it becomes aligned with as primary mirror frame 25 is moved longitudinally with respect to handle 22 . with rib 244 resiliently engaged within a detent groove 237 , a relatively large longitudinal force must be exerted on handle 22 relative to primary mirror frame 25 to disengage the rib from the groove . thus constructed , primary mirror frame 25 is telescopically extendible and retractable with respect to handle 22 , to an adjustable length or height relative to base 22 , the adjusted height being maintained by cooperative action of the detent rib and a detent groove .
a portable travel mirror device includes a base , a handle pivotably mounted to the base , and a dual mirror assembly mounted to the handle which is pivotable and telescopically extendable between compact transport and upright use configurations , and includes a circular primary mirror frame holding a magnifying mirror encircled by a ring - shaped lamp energized by a power source within the base , and overlain by a diffuser ring . a secondary mirror pivotably and swivelably attached to the primary mirror frame has a different magnification factor , e . g ., 1 ×, and is pivotable upwards from a travel position overlying and protecting the primary mirror to an upright use position , and is also swivelable into contact with the primary mirror frame , whereby light from the lamp is transmitted through the diffuser ring and a transparent secondary mirror bezel to illuminate objects in front of the primary or secondary mirror .