referring now to the drawings in which like numerals denote similar elements and more particularly to fig1 there is shown , by way of illustration , but not of limitation , a cleaning device 10 constructed according to the present invention comprising a resilient tip 11 , a housing 12 supporting said resilient tip , a groove 13 in said housing , a moveable button 14 moveable in said groove , and end cap 15 . fig2 depicts the same embodiment with end cap 15 removed and bristles 16 partially visible . although in the embodiment shown , the bristles 16 and the resilient tip 11 are shown as being affixed to the same member , they need not be ; cap 15 , for example , could just as easily serve as a handle for brush 16 which could be enclosed in housing 12 , for example . in the embodiment shown , button 14 communicates directly with the diaphragm 17 containing the bristles 16 . the brush may be advanced in this embodiment by advancing the button 14 along groove 13 . other means of providing such advancement may be employed equally well , such as a rotating handle with screw threads . whatever the means , as may be seen by comparing the bristles 16 in fig2 and 3 , no advancement or slight advancement will provide the stiffest brushing action , and continued advancement will provide a greater effective length of the bristles and , hence , more flexible brushing action . fig3 depicts the bristles extended to their maximum extension and the advancing button 14 locked into its maximum position . normally , the amount of force applied to the bristles during cleaning will be small enough , and the amount of resistance in the advancing mechanism will be large enough , that there will be no need to &# 34 ; lock &# 34 ; the bristles in place . for that reason , no intermediate locking positions are shown in this embodiment , although the same could be easily included were it desired so to do . the free ends of bristles 16 are shown in fig2 and 3 in one preferred state as forming a generally convex shape . this shape , or its many equivalents , has been found to provide the best cleaning action for the edges of recessed convex lenses and is thus one preferred embodiment . fig4 and 6 show another preferred embodiment . fig4 shows the cleaning device in a closed form and with an optional camouflaged exterior finish . as best illustrated in fig5 the protective end cap 21 also supports resilient tip 11 and is removeable from barrel housing 23 . handle 22 may be rotated with respect to housing 23 and thereby advance or retract the bristles of brush 24 to a desired extension and stiffness , which bristles are shown fully extended in fig6 . the dome cut tip ends 25 of brush 24 may best be seen in fig5 . protective covering 21 may be removably secured to the brush means by frictional engagement with a plurality of ridges 26 located on said housing 23 or by other convenient means . fig7 depicts a convenient kit for carrying the device of the present invention along with a container of cleaning fluid for multi - coated filters and lenses , a container for anti - fog solution , and a number of disposable , optically - safe cleaning tissues . fig8 shows one preferred form of a smooth - surfaced disposable cleaning means , which may alternatively be shaped in a polygonal form . thus it may be seen that a convenient and easily transportable kit has been provided for the rapid and safe cleaning , in the field , of recessed convex lenses , or for the safe and effective application of anti - fogging or other special - purpose solutions , as well as a novel brush for use therewith . it will be apparent from the foregoing that many other variations and modifications may be made in the apparatus hereinbefore described by those having experience in this technology without departing from the concept of the present invention . accordingly , it should be clearly understood that the apparatus and methods depicted in the accompanying drawings and referred to in the foregoing description are illustrative only and are not intended as limitations on the scope of the invention .
a device and kit for cleaning generally convex surfaces of lenses of field articles such as hunting scopes , telescopes , cameras and the like .