Auxiliary clip-on eye protectors
United States Patent [191 Loughner 1 AUXILIARY CLIP-ON EYE PROTECTORS [75] Inventor:  
 [73] Assignee: American Optical Corporation.  
 Southbridge. Mass.  
 [22] Filed: Feb. 27. 1974 {21) Appl. No.: 446,256  
 Larry G. Loughner. Andover. Mass.  
 [52] U.S. Cl 351/47: fill-18:57:58 {51] Int. Cl. G026 9/04; GU20 7/08 [58] Field of Search 351/47. 48. 57. 58; 2/13 [56] References Cited UNlTED STATES PATENTS 3.413.057 11/1968 Carmichael 351/47 X 1 Apr. 8, 1975 3.531.188 9/1970 Lehlane et a1. 351/48 Prinmry Eramimr-Paul A. Sacher .llmrmy. Agent. or Firm-H. R. Berkenstock. Jr; William C. Nealon [57] ABSTRACT An assembly of auxiliary lenses which can be clipped onto a wearers primary spectacles and selectively pivoted into and out of a position of use over the lenses of the primary spectacles.  
 8 Claims, 5 Drawing Figures PA&#39;I&#39;EH IED m 81375 FIG. 2 24a AUXILIARY CLIP-ON EYE PROTECTORS BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to auxiliary eye protectors which are removably attachable to a wearer&#39;s primary spectacles and has particular reference to eye shields which may be pivot-ably lowered and raised respectively toward and away from lenses ofthe primary spectaclcs. as desired.  
 2. Description of the Prior Art Auxiliary eye protectors of the aforementioned type are commonly referred to as tlip-tips&#34; and have heretofore embodied overly complex constructions each requiring the costly fabrication and tedious assembly of many separate components. In addition to high manufacturing costs. the resulting ungainliness of assemblies of the usual multiplicity of components tends to render such structures highly susceptible to malfunction and- [or breakage.  
  Accordingly. a principal object of the present invention is to overcome the aforementioned and related drawbacks of prior art auxiliary llip-up eye protectors by providing a greatly simplified flip-up construction comprised of an absolute minimum of component parts resulting in a corresponding minification of end product malfunction and improved aesthetics. This reduc tion in the number of parts also lessens assembly time and overall manufacturing cost thereby offering the possibility of greater production output and market availability at a lower consumer cost per item.  
 SUMMARY OF THE INVENTION The aforementioned objective and its corollaries are accomplished according to the present invention through the provision of a novel two-part lens supporting flip-up structure. A stamped or otherwise we formed flat piece of thin and resilient material. preferably sheet metal. is bent into the form of a unit having a pair of clips for attaching the intended flip-up structure to primary spectacles. a finger engaging portion to facilitate handling of the flip-up structure and a bridge clamping arm with which this component of the flip-up is clamped to a lens supporting bridge. The bridge which forms the second part of the two-part structure comprises a rod adapted to receive an auxiliary lens at each of its opposite ends and has intermediate caming portions against which the first mentioned component is rotatably held by its clamping arm for detenting the flip-up into preselected positions forwardly of and away from the lenses of a wearer&#39;s primary spectacles when the flip-up (auxiliary eye protector) is in use.  
  The invention will be more fully understood by reference to the following detailed description when taken in conjunction with the accompanying drawings.  
 IN THE DRAWINGS FIG. I is a rear view. in perspective. of a preferred embodiment of the invention;  
  FIG. 2 is a top plan view of the auxiliary eye protector. a small portion of which is broken away to illustrate its underlying structure;  
  FIG. 3 is an enlarged vertical cross-sectional view taken generally along line 33 of FIG. 2 looking in the direction of the arrows:  
 lll  
  FIG. 4 is a view. in front perspective. of the bridge element of the embodiment ofthe invention illustrated in FIGS. 1-3; and  
  FIG. 5 is a plan view of a llat preform from which a second element of the structure shown in FIGS. l-3 is produced.  
 DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring more particularly to FIGS. I and 2 of the drawings. it will be seen that auxiliary eye protector It) comprises a two-part lens supporting structure wherein lenses I21: and I2!) are riveted to bridge 14. In the presently illustrated embodiment of the invention. opposite ends of bridge 14 are flattened and drilled or pierced to receive lens securing rivets 16. It should be understood. however. that lenses I21! and 12/) may be ccmented. snapped or otherwise attached to bridge I4. if desired.  
  Bridge I4. which comprises one component of the aforesaid two-part lens supporting structure. is provided with S-shaped bends [8 which produce a sct back section 20 adapted to pivotally rccei\ e the second component 22 of eye protector III.  
  Component 22 is preferably formed of a single piece ofthin. resilient sheet material. preferably metal. which is stamped or otherwise cut to the configuration shown in FIG. 5 and thence bent. eg. with suitably forming dies. into its final configuration. Component 22 may. within the scope of this invention. he injection molded or otherwise formed to the configuration shown and described herein.  
  Component 22 in finished form comprises a pair of laterally spaced inverted U-shaped clips 24a and 24h which are formed of extensions 2411.. and 241: of the flat preform illustrated in FIG. 5. Clips 241: and 24h are tipped with coverings 26 of plastic. fabric or flocking to prevent scratching of a wearers primary spectacles when the auxiliary eye protector I0 is applied thereto as will be described shortly.  
  Legs 28 of component 22 extend forwardly from clips 24:! and 24b in back-to-back L-shapcd fashion to finger-gripping section 30 whcrewith the eye protector may be readily handled with a persons index finger and thumb. one placed over and the other beneath section 30. Section 30 is terminated with a reverse bend 32 and the remaining portion of component 22 is continued rearwardly as clamping arm 34 having its free end provided with a cylindrically shaped bearing portion 36.  
  Arm 34 of component 22 is spring-biased upwardly toward section 30 and bridge 14 is frictionally journaled in bearing portion 36. This assembly of bridge I4 and component 22 may be made simply by urging arm 34 slightly downwardly away from section 30 and snapping the centermost section 38 of bridge 14 into bearing portion 36.  
  As mentioned hercinabove. the sheet metal stamping from which component 22 is formed may be initially of a highly resilient material or. after final shaping of component 22 to the general configuration shown in FIGS. I, 2 and 3, the component may be tempered to enhance the upwardly directed spring tensioning of arm 34 and- /or the resiliency of the inverted U-shaped clips 24a and 2417.  
  In one embodiment of the invention (not shown). the entire portion of bridge 14 extending between its S- shaped bends 18 may be uniformly circular in cross section whrewith bridge 14 and lenses 12a and 12!: car ried thereby may be rotated as a unit within bearing portion 36 of component 22 and frictionally held at any preselected set position of such adjustment by the ten sion of spring arm 34 thereagainst. Preferably. howe\er. bridge 14 is provided with detenting cams Ml at either side of the centermost portion 38.  
  Cams 40 hich are cut. stamped or machined into bridge 14 each have a pair of adjoining flat faces 42 and 44. They are engaged by legs 28 of component 22 which. in turn. are held firmly thereagainst by the spring tension of arm 34 tending to pull section 30 and legs 28 downwardly toward bearing portion 36.  
  With tlats 42 of cams 40 resting squarely against the undersurfaces of legs 28. bridge l4 and lenses 12a and 12h become detented into a preestablished position here lenses 12a and 12/) are directed downwardly generally parallel to the downward extension of U- shaped clips 24a and 24/ as shown with full line illustration FlGS. l. 2 and 3. By manually overriding this detentcd position of the bridge. ie by manually flipping lenses I21: and 12h upwardly until flats 44 of cams 4t) assume a position squarely against legs 28 of component 22. the bridge I4 and lenses 12a. and [2!] become releasably dctented in the raised position which is illustrated in FIGSv l and 3 with broken lines.  
  When the auxiliary eye protector of the present imention is attached to a wearers primary spectacles with clips 24a and 24b in the usual fashion. the detented position of bridge 14 and lenses [2a, and 12b carried thereby which is shown by full line illustration in FIGS, 1, 2 and 3 positions lenses I and 12h di rectly forwardly of and generally parallel to the right and left eye lenses respectively of the wearers primary spectacles. With bridge 14 and lenses 12a. and 121) rotated to the position illustrated by broken lines in FIGS. 1 and 3, however. the lenses 12a. and [2b become positioned above and away from the wearers primary spectacle lenses, While the angle subtended by surfaces 42 and 44 of cams (see FIG. 3) is illustrated being less than a right angle. it may be as much as 90 or greater if desired for alteration of relative detented positions of bridge [4 in component 22.  
  Those interested in details of the manner in which flip-up auxiliary eye protectors may be attached to a wearer&#39;s primary spectacles may refer to either of US. Pat. Nos. 3 4l3.(l57 and 3,53l.l88.  
  From the foregoing description it can be seen that the auxiliary eye protector of the present invention is comprised of an obsolute minimum of component parts wherewith its unique construction minimizes breakage and malfunction during use. reduces manufacturing cost and enhances end product aesthetics.  
 I claim:  
  I. An auxiliary lens supporting structure comprising a bridge adapted to receive and support a lens at each of its opposite ends and a second member about which said bridge is pivotable, said second member comprising the unitary structure of a pair of spaced U-shapcd :lips, a finger gripping section intermediately of said :lips and extending away therefrom, said section being :erminated with a reverse bend and having a bridge :lamping arm extending from said reverse bend generally toward said U shaped clips, said clamping arm )eing resiliently biased toward said finger gripping sec- :ion and terminating with a bearing portion for pivot- 1lly clamping said second member to said bridge intermediately of the opposite ends of said bridge whereby the bridge may be selectively manually pivoted relative to said second member for bringing lenses supported thereby into preselected differently oriented relationship with respect to a given position of said second member.  
  2. An auxiliary lens supporting structure according to claim I wherein said bridge is provided with at least one cam section intermediately of said opposite ends thereof and a portion of said finger gripping section of said second member is resiliently clamped against said cam section by said clamping arm.  
  3. An auxiliary lens supporting structure according to claim I wherein said bridge has a centrally disposed portion ofcircular cross-sectional configuration against which said bearing portion of said clamping arm is seated for pivotally connecting said second member to said bridge.  
  4. An auxiliary lens supporting structure according to claim 3 wherein said bridge further includes a cam section adjacent each of opposite ends of said central portion of circular crosssectional configuration. said finger gripping section of said second member having a pair of legs one of each engaging one of said cam sections and said clamping arm resiliently urging said legs of said finger gripping section against said cam sections whereby said bridge may be pivotally detentcd into preselected positions of differently oriented relationships with respect to said given position of said second memher.  
  5. An auxiliary eye protector for attachment to a wearer&#39;s primary sepctaclcs comprising a bridge having a lens attached to each of its opposite ends. a second member about which said bridge is pivotable. said second member comprising the unitary structure ofa pair of laterally spaced inverted U-shaped clips, at forwardly directed finger gripping section terminated with a re verse bend and having a clamping arm extending rearwardly from said reverse bend. said clamping arm being resiliently biased upwardly toward said finger gripping section and itself terminating with a bearing portion for pivotally clamping said second member to said bridge member intermediately of said lenses whereby, with said bridge member so journaled in said bearing portion. said lenses may be selectively manually pivoted in unison toward and away from a position in front of said primary spectacles when said auxiliary eye protector is attached to such spectacles with said U-shaped clips.  
  6. An auxiliary eye protector according to claim 5 wherein said bridge is provided with at least one cam section intermcdiately of said opposite ends thereof and a portion of said finger gripping section of said second member is resiliently clamped against said cam section by said clamping arm.  
  7. An auxiliary eye protector according to claim 5 wherein said bridge has a centrally disposed portion of circular cross-sectional configuration against which said bearing portion of said clamping arm is seated for pivotally connecting said second member to said bridge.  
  8. An auxiliary eye protector according to claim 7 wherein said bridge further includes a cam section adjacent each of opposite ends of said central portion of circular cross-sectional configuration, said finger gripping section of said second member having a pair of legs. one of each engaging one of said cam sections and said clam ping arm resiliently urging said legs of said finger gripping section against said cam sections whereby said bridge may be pivotally detented into preselected positions of differently oriented relationships with respect to said given position of said second member.