fig1 - 10 illustrate various structural and functional aspects of a dual magnification , reversible spot mirror according to the present invention . as shown in fig1 - 3b , a dual magnification reversible mirror 20 according to the present invention includes a dual mirror frame assembly 21 that contains within a circular ring - shaped frame hoop 22 a pair of circular mirror plates 23 , 24 . as may be seen best by referring to fig9 in addition to fig1 - 3b , mirror plates 23 , 24 have concave , spherically curved reflective surfaces 25 , 26 of different curvature . thus , mirror plates 23 , 24 have different magnifications , e . g ., 5 × and 10 ×. as shown in fig9 , mirror plates 23 , 24 have convexly curved rear surfaces 27 , 28 . also , mirror frame hoop 22 has formed in an inner cylindrical wall surface 29 thereof front and rear counterbore entrance openings 30 f , 30 r which form front and rear annular ring - shaped shoulder ledges 31 f , 31 r , respectively , that support the outer peripheral edges of rear surfaces 27 , 28 of mirror plates 23 , 24 . mirror plates 23 , 24 are retained within mirror frame hoop 22 by conventional means , such as by a pressure - sensitive adhesive layer 32 between the transverse surfaces 33 f , 33 r of ledges 31 f , 31 r and the outer peripheral edges of rear mirror plate surfaces 27 , 28 . preferably , mirror plates 23 , 24 are also held in fixed relative relation and therefore fixed within hoop 22 by an additional adhesive layer 34 between central regions of rear surfaces 27 , 28 of mirror plates 23 , 24 . as is also shown in fig9 , frame hoop 22 is provided with an annular ring - shaped rib 35 which protrudes radially outwardly from outer cylindrical surface 36 of the frame hoop . hoop rib 35 is located equal distances from front and rear faces 37 f , 37 r of hoop 22 , i . e ., is longitudinally centrally located on the hoop . rib 35 has a radiused , i . e ., convex , arcuately curved outer surface 38 . referring again to fig1 - 3b , it may be seen that mirror 20 according to the present invention includes a mirror frame holder 40 which releasably holds mirror frame assembly 21 , and a mounting bracket 41 which is releasably attachable to a flat mounting surface and pivotably supports the mirror frame holder . the structure and function of mirror frame holder 40 may be best understood by referring to fig2 , 3 a , 3 b and 6 - 10 . as shown in those figures , mirror frame holder 40 has a laterally symmetric plan - view shape which is similar to that of a cross having a relatively wide , vertically elongated central upright web section 42 which has protruding from opposite vertical sides thereof a pair of laterally opposed , upwardly angled left and right cross arms 43 l , 43 r . frame holder 40 has a plate - like base portion 44 of generally uniform thickness , and has protruding rearwardly from rear surface 45 thereof a generally rectangular cross - section peripheral rib 46 which has a rear wall surface 47 spaced rearwardly of and parallel to rear base surface 45 . peripheral rib 46 arcuately joins outer wall surfaces of a lower end portion 48 of central vertical web section 42 , and left and right cross arms 43 l , 43 r . also , peripheral rib 46 has a pair of parallel , laterally spaced apart posts 49 l , 49 r adjacent to opposite sides 50 l , 50 r of an upper end portion of the central vertical web section 42 of frame holder base 44 . a pair of coaxially aligned bushings 52 l , 52 r protrudes laterally inwardly from inner facing sides 53 l , 53 r of posts 49 l , 49 r . bushings 52 l , 52 r have vertically disposed , laterally spaced apart inner facing vertical faces 54 l , 54 r which have extending outermost therefrom a pair of coaxially aligned , pivot pin bores 55 l , 55 r . as may be seen best by referring to fig3 a , 3 b , 6 , and 7 , the outer transverse ends 56 l , 56 r , and 57 of left and right cross arms and lower end portion 48 of frame holder base portion 44 have protruding perpendicularly upwardly or forwardly of front wall surface 58 of base web 42 flange walls 59 l , 59 r , and 60 , respectively . as shown in fig3 a , 3 b and 6 , flange walls 59 l , 59 and 60 have a relatively uniform thickness , and have flat and co - planar upper wall surfaces 61 l , 61 r , and 62 , respectively . also , as may be seen best by referring to fig3 and 6 , upper flange wall surfaces 61 l , 61 r and 62 are arcuately curved , and lie on a circle . as may be seen best by referring to fig7 , each flange wall 59 l , 59 r , and 60 has protruding radially inwardly of an inner longitudinally disposed side wall 63 l , 63 r , and 64 thereof an arcuately curved lip 65 l , 65 r , 66 , respectively . lips 65 l , 65 r and 66 have an arcuately curved transverse cross sectional shape , i . e ., are radiused . frame holder 40 is so constructed that flange walls 59 l , 59 r and 60 are elastically deformable in a radial direction , i . e ., perpendicular to a longitudinal center line of the mirror frame holder . thus , in a preferred embodiment , mirror frame holder 40 is made of an elastically flexible polymer such as plastic . also , spacing between the center of frame holder base 42 and the inner facing radiused surfaces 67 l , 67 r and 68 of flange wall lips 65 l , 65 r and 66 is slightly less than the radius of the outer cylindrical surface 36 of circumferential frame rib 35 . with this construction , inserting mirror frame 21 into a cylindrically shaped receptacle opening 69 formed between flange wall lips 65 l , 65 r and 66 causes mirror frame rib 35 to slidably contact the lips and deform flange walls 59 l , 59 r and 60 elastically in radially outwardly directions . pushing mirror frame 21 sufficiently far downwardly towards upper surface 70 of frame holder base 40 thus causes rear surface 71 of the frame to seat on the front surface of the frame holder , whereupon flange wall lips 65 l , 65 r , and 66 spring inwardly in front of the frame rib to thereby captivate the frame within the frame holder , as shown in fig8 and 9 . referring now to fig2 - 5 , it may be seen that mounting bracket 41 of mirror 20 includes a flat mounting bracket plate 71 of generally uniform thickness . as shown in fig4 , mounting bracket plate 71 has a laterally symmetric plan - view shape which approximates that of a cross which has a relatively wide , vertically elongated central upright web section 72 that has protruding from opposite vertical sides thereof a pair of laterally opposed left and right cross arm members 73 l , 73 r , respectively . central upright web section 72 of mounting bracket plate 71 has a lower longitudinal end portion 74 and an upper longitudinal end portion 75 . although not necessary for the function of mounting bracket 41 , the perimeter of mounting bracket plate may be a continuously and sinuously curved side wall 71 a which joins the lower longitudinal end portion 74 , left and right cross arms 73 l , 73 r , 11 and upper longitudinal end portion 75 . as shown in fig4 and 5 , upper longitudinal end portion 75 of mounting bracket plate 71 is terminated at an upper end thereof by a transversely disposed cylindrically - shaped enlargement 76 which has a diameter greater than the thickness of the mounting bracket plate and which arcuately and symmetrically joins front and rear wall surfaces 77 , 78 , respectively , of the mounting bracket plate . as shown in fig4 , cylindrically - shaped enlargement 76 has a transversely disposed upper edge wall in which is formed a rectangularly shaped , vertical slot 80 . slot 80 , which preferably has an arcuately curved , concave lower end wall 81 , bifurcates cylindrical enlargement 76 into left and right cylinders 76 l , 76 r , respectively . the latter have protruding laterally outwardly from opposite vertical faces 82 l , 82 r thereof coaxially aligned pivot pins 83 l , 83 r , respectively . as may be seen best by referring to fig1 , 2 , 7 and 8 , pivot pins 83 l , 83 r fit in a relatively tight , but rotatably interference fit within pivot pin bores 55 l , 55 r of mirror frame holder bushings 52 l , 52 r , respectively . referring to fig4 , it may be seen that mounting bracket plate 71 has through its thickness dimension three keyhole - shaped suction cup mounting holes , including left and right holes 84 l , 84 r , and bottom hole 84 b , located generally concentrically within outer portions of left and right cross arms 73 l , 73 r , and lower end portion 74 of central upright section 72 , respectively , of the mounting bracket plate . each keyhole 84 l , 84 r , 84 b has a generally circularly shaped portion 85 l , 85 r , 85 b of a diameter sufficiently large to receive the button - shaped head 86 of a suction cup 87 which has a concave , circular suction base 88 . also , each circularly - shaped portion 85 l , 85 r , 85 b of keyholes 84 l , 84 r , 84 b has disposed radially outwardly therefrom a generally oval shaped slot 89 l , 89 r , 89 b , respectively . each of the slots has a width smaller than the diameter of a suction cup head 86 , but of sufficient width to enable the neck 90 of the suction cup to slide within the slot . this construction facilitates installation of suction cups 87 in mounting bracket plate 71 , and disengaging the mounting bracket plate from suction cups . this is accomplished by positioning the head 86 of suction cup in vertical alignment with a larger diameter portion 85 of a keyhole 84 and sliding the neck 90 of the suction cup in slot 89 to captivate the lower surface of the suction cup head within the slot , when it is desired to engage the suction cups with the mounting bracket plate , and reversing the aforementioned steps to unfasten the bracket plate from the suction cups . as shown in fig3 a , lower wall surface 91 of mirror frame holder base 44 preferably has formed therein a shallow uniform depth recess 92 which has the same outline shape but of slightly larger size than the plan - view shape of mounting bracket plate 71 . also , recess 92 preferably has formed through base wall 93 thereof three circular perforations 94 l , 94 r , 94 b , which have the same relative orientation with respect to the perimeter of recess 92 as that of keyholes 84 l , 84 r , and 84 b to the perimeter of mounting bracket plate 71 . with this arrangement , mirror frame holder 41 is pivotable into a flush , parallel overlying relationship to mounting base 40 , with mounting base bracket 71 received in recess 92 in the rear of the mirror holder frame , and suction cup heads 86 l , 86 r , 86 b received in perforations 94 l , 94 r , 94 b , through base 44 of the mirror holder frame , as shown in fig2 , 7 and 10 . the manner of using dual magnification reversible spot mirror device 20 according to the present invention may be best understood by referring to fig1 and 8 - 10 . as shown in fig1 , mirror 20 is readily attached to a relatively smooth , flat vertical or horizontal mounting surface such as the front surface b of a wall or cabinet mounted mirror a by pressing the mirror holder frame downward towards the mounting surface , thereby hermetically adhering suction cups 87 which protrude rearwardly from the frame holder mounting bracket plate to the mounting surface . mirror device 20 may be attached to a mounting surface with the mirror frame assembly 21 installed in mirror frame holder 40 and oriented parallel thereto , as shown in fig1 . optionally , frame assembly 21 may be pivoted upwardly away from mirror frame holder 40 , as shown in fig3 a , 3 b and 8 , and / or may be optionally removed from the mirror frame holder , as shown in fig8 . those configurations of mirror frame assembly 21 are preferably employed to unfasten suction cups 87 from a mounting surface , since , as explained above , this facilitates sliding necks 90 of the suction cups in oval slots 84 through mounting bracket plate 71 , to thereby align heads 86 of the suction cups with larger diameter portions 85 of mounting bracket plate keyholes 84 , whereupon the mounting bracket plate can be pulled forward from the mounting surface , the suction cup heads being pulled through those circular portions of the keyholes . as shown in fig8 , mirror frame assembly 21 may be removed from mirror frame holder 40 in which it is installed with a particular magnification mirror plate , e . g ., 10 × magnification mirror plate 24 , facing forward for viewing by a user , reversed to position the other mirror plate , e . g ., lower , 5 × magnification plate 23 forward , and re - installed in the mirror frame holder as shown in fig1 .
a dual magnification reversible spot mirror device includes two mirrors having different magnifications , e . g ., 5x and 10 x , mounted back - to - back in a cylindrical frame ring which has an outer cylindrical wall surface from which protrudes a circumferential annular ring - shaped rib , and a mirror frame holder which has protruding forwardly from a base thereof a plurality of circumferentially spaced apart , longitudinally disposed flange walls which are elastically deformable in a radially outwardly direction from a longitudinal center line perpendicular to the base . retainer lips protruding radially inwardly from inner longitudinal wall surfaces of the flange walls are forced radially outwardly in response to rearward forcible contact with the lips by the frame rib , whereupon the flange walls deflect elastically inwardly to an undeformed position in which the mirror frame ring with a reversible selected mirror facing outwards is captivated between a front wall surface of the base and rear surfaces of the flange wall lips . the base of the mirror frame holder is pivotably mounted to a mounting base which has suction cups protruding rearwardly therefrom for releasable attachment to a flat surface such as the vertical surface of a larger wall or cabinet mirror , or the horizontal surface of a table top or vanity .