CA1079104A - Safety spectacles - Google Patents
Safety spectaclesInfo
- Publication number
- CA1079104A CA1079104A CA276,864A CA276864A CA1079104A CA 1079104 A CA1079104 A CA 1079104A CA 276864 A CA276864 A CA 276864A CA 1079104 A CA1079104 A CA 1079104A
- Authority
- CA
- Canada
- Prior art keywords
- lens
- lenses
- slots
- recess
- rim
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C1/00—Assemblies of lenses with bridges or browbars
- G02C1/06—Bridge or browbar secured to or integral with closed rigid rims for the lenses
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Ophthalmology & Optometry (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A pair of safety spectacles having disposable lenses which may be replaced by the wearer without the use of tools. The frame front has a pair of rims each internally recessed to receive a lens, the recess in each rim being of a preselected peripheral configuration and including a plurality of spaced slots extending therebeyond into the rim. The lenses have a peripheral shape matching the recess and are provided with peripheral tabs adapted to be snapped into and out of the spaced slots with finger pressure.
A pair of safety spectacles having disposable lenses which may be replaced by the wearer without the use of tools. The frame front has a pair of rims each internally recessed to receive a lens, the recess in each rim being of a preselected peripheral configuration and including a plurality of spaced slots extending therebeyond into the rim. The lenses have a peripheral shape matching the recess and are provided with peripheral tabs adapted to be snapped into and out of the spaced slots with finger pressure.
Description
~7910.~
.TY_ sr~c rAc~.~s ~ ackground of the Invention Field of the Invention:
Safety eyewear with particular reference to spectacles having replaceable lenses.
Description of the Prior Art:
Customarily, a plastic spectacles frame is fitted with lenses by heating the frame and stretching it enough to allow beveled lenses to be fitted into grooved rims of the frame. This requires special equipment and trained personnel both of which are, more often than not, unavailable at the site where lens replacement may be required. Additionally, each such lens replacement is tedious and time-consuming requiring delays in operations where safety spectacles must be worn.
In recognizing these problems ? the prior art offers a scheme for snapping conventionally bevel-edged lenses into and out of rims of plastic spectacle frames with finger pressure but without optimum end result.
The usual bevel grooving is eliminated in lens-receiving rims of these prior art frames and, instead, they are provided with a forwardly opening L-shaped recess which freely accepts the full effective diameters of the beveled lenses. The lenses are snapped over holding tabs which are formed as integral parts o~ the lens rims.
In each case of a lens removal and replacement, these holding tabs suffer the abuse of being twice overridden; first by the acutely beveled edges of the mbJ - 2 -10'79104 lens being removed an<l re~lsced and secondly by similar acutely beveled edges of the replacement lens. Wear, chipping and cracking of the holding tabs, if not complete breaking away from the frame, quickly renders the frame incapable of properly supporting its lenses.
Thus, the intended convenience and economical advantage of being able to readily replace and dispose of damaged lenses is largely defeated by short effective frame life.
It is, accordingly, an object of the present invention to obviate the ordinary time-consuming and costly heating and rim-stretching operations required for damaged lens replacement in safety eyewear and, more particularly, to improve over schemes currently used for snap-in lens replacement with finger pressure. In this latter respect, an objective is to provide a safety lens system wherewith removal and replacement of lenses can be accomplished with finger pressure alone but without undue wear and/or other damage to the more costly frame component of the spectacles system and further wherewith wear and/or damage incurred by lens removal and replacement will be preferentially imparted to the already damaged and disposable lens element in each case. This allows long-term frame life and economic feasibility in the use of expensive but higher quality and better fitting frames in safety spectacles.
A more general obiect is to provide for simple, quick and economical removal and replacement of damaged lenses in safety spectacles wherewith any and all wear and/or other abuses of parts occurring during lens removal mb~ ~ - 3 -iO79104 and replacement nre substantially completely, if not totally, applied to the lenses being discarded rather than to the ~ore costly reusable lens-supporting frames.
Other objects and advantages of the invention will become apparent from the following summary of the invention and description of its preferred embodiments.
mb/ - 3a -10791~
RY (:)F TIIF. l N~ll.N'l`ION
The foregoing objectives and their corollaries are accomplished by the provision of safety spectacles having manually replaceable lenses comprising: a frame front having a pair of rims each internally recessed to receive a lens, the recess in each rim being of a preselected peripheral configuration and including a plurality of spaced slots extending therebeyond into the rim; a lens manually insertable into each of the rims, the lens having a peripheral shape and size substantially matching the configuration of the recess in each case and further having radially extending tabs at points correspond-ing to locations of the slots in the recess, the tabs being extendable into the slots to secure the lens in the safety spectacles. By such means, immediate replacement of scratched, spattered, cracked or otherwise damaged lenses may be accomplished by the wearer without the need for tools, special equipment or training and with minimal time away from the job. These slots which obviate the need for prior art lens-retaining tabs, minimize, if not eliminate, wear upon the spectacles frame and afford exceptionally long useful frame life regardless of frequency of lens replacement, Details of the invention will become more readily apparent from the following description when taken in conjunction with the accompanying drawings, I~ THE DRAWI~GS
Fig. 1 is a fragmentary front elevational view of a preferred embodiment of the invention;
mbl- - 4 -107910~
F;g, 2 is a fron~ elevational view of a type of lens intended for use in the spectacles depicted in Fig, 1 and Fig. 3 is an enlarged cross-sectional view taken generally a].ong line 3-3 of Fig, 1 wi.th an intermediate portion thereof broken away for convenlence of illustration.
mbl, - 4a -1~79~04 DESCRIPTION OF THE PREFERRED EMBODIMENTS
_ Spectacles 10 (Figs. 1 and 3) comprise frame front 12 and disposable lenses 14 which are readily removable and replaceable in front 12 according to the invention. The size, shape and general styling of frame front 12 here shown has been selected merely for purposes of illustration, it being understood that various modifications may be made within the scope of the invention, the crux of which relates to a uniqueness in the construction of lens rims 16 of frame 12 and lenses 14 intended to be detachably fitted thereinto.
It will become apparent as this description progresses that bridge 18, endpieces 20 and rims 16 may be of any size and/or shape desired and preferably, but not necessarily, of heavier and/or more rigid construction than that used for ordinary streetwear.
Front 12 is provided with a temple 22 hinged to and extending rearwardly from each endpiece 20 for supporting the structure upon the face of a wearer in conventional fashion.
Frame front 12 may be cast, molded, punched and/or machined to shape and size. Finishing would normally include polishing with tumbling and/or buffing operations. Front 12 may be formed of cellulose acetate, butyrate or propionate and lenses 12 may be formed of an optical quality acrylic (e.g. Plexiglas ~, propionate or polycarbonate. Other materials known and used in the spectacles frame and lens art may, of course, be used.
mb/ - S -iO79104 Referring more particularly to structural details of spectacles 10, it can be seen in Figs. 1 and 3 that rims 16 of frame front 12 are each provided with an internal lens-receiving recess 24 having a generally L-shaped cross-sectional configuration.
At preselected points about recess 24 the frame is deepened in the form of slots 26, three of which have been illustrated in each rim 16. It should be understood that greater or lesser numbers of slots 26 may be provided, if desired. Referring more particularly to Fig. 3, it can be seen that slots 26 have a V-shaped cross-sectional configuration.
~hile various other shapes may be used, this V-shape is preferred for reasons which will become more apparent as this description progresses.
Disposable lenses 14 intended for use with frame front 12, one of which is illustrated separately in Fig. 2, are preferably of a meniscus or other concavo~
convex cross-sectional configuration having a peripheral shape and size adapted to match and fit freely into L-shaped recess 24 against shoulder 28 thereof substantially as illustrated with full lines in Fig. 3.
At locations about the edge of lens 14 which correspond to positions of slots 26 in frame front 12, tabs 30 of a generally V-shaped, i.e. bevelled, configuration ~Fig. 3) are provided. These tabs, as integral extensions of lens 12 in each case, retain the lens in place when entered into corresponding slots 26 of frame front 12.
mb/ - 6 -10'~910~
The bevelled external configuration of tabs 30 permits easy entrance thereof into slots 26. With the lens centered in recess 24, pressure of the fingers against its convex side adjacent one or more of tabs 30 will effect a "snap-in" mounting thereof in frame front 12. Similarly, removal of the lens for disposal and replacement may be effected by pressing the fingers against the concave or rear surface of the lens adjacent one or more of tabs 30. Accordingly, spattered, cracked, scratched, fractured or otherwise damaged lenses 14 may be quickly and easily removed, discarded and replaced without the need for tools and/or special skills and with minimal loss of time on the job.
The leading edges 32 (Fig. 3) of slots 26 are smoothly rounded to facilitate entrance of tabs 30 and these rounded edges are supported by a substantial thickness of rim material so that lens tabs 30 prefer-entially receive substantially all wear and/or damage which may result from their resistance to entrance into or removal from slots 26. Thus, frame front 12 can withstand a great multiplicity, if not unlimited, lens replacement operations without appreciable wear or sacrifice of its original lens-retaining capabilities.
Dot-dash outline of lens 14 in Fig. 3 illustrates a manner in which the lens may be entered into rims 16.
By first entering an edge of lens 14 oppositely of a preselected tab 30 (e.g. the top edge of lens 14) partially or fully into L-shaped recess 24, finger pressure applied adiacent the opposite tab, e.g. as illustrated by arrow 34 mb/ - 7 -~079104 will force tab 30 into its corresponding slot 26.
It is contemplated that users of spectacles 10 be provided with a supply of replacement lenses for on-the-jobreplacement and disposal of damaged lenses. Furthermore, the long useful life of frame front 12 that can be expected offers the opportunity to supply, without economic hardship, higher quality, better fitting and more comfortable spectacles frame structures than the short term, less expensive but inferior products, Those skilled in the art will readily appreciate that there are various other modifications and adaptations of the precise form of the invention here shown which may suit particular requirements.
Accordingly, the foregoing illustrations are not to be interpreted as restrictive of the invention beyond that necessitated by the following claims.
mbJ - 8 -
.TY_ sr~c rAc~.~s ~ ackground of the Invention Field of the Invention:
Safety eyewear with particular reference to spectacles having replaceable lenses.
Description of the Prior Art:
Customarily, a plastic spectacles frame is fitted with lenses by heating the frame and stretching it enough to allow beveled lenses to be fitted into grooved rims of the frame. This requires special equipment and trained personnel both of which are, more often than not, unavailable at the site where lens replacement may be required. Additionally, each such lens replacement is tedious and time-consuming requiring delays in operations where safety spectacles must be worn.
In recognizing these problems ? the prior art offers a scheme for snapping conventionally bevel-edged lenses into and out of rims of plastic spectacle frames with finger pressure but without optimum end result.
The usual bevel grooving is eliminated in lens-receiving rims of these prior art frames and, instead, they are provided with a forwardly opening L-shaped recess which freely accepts the full effective diameters of the beveled lenses. The lenses are snapped over holding tabs which are formed as integral parts o~ the lens rims.
In each case of a lens removal and replacement, these holding tabs suffer the abuse of being twice overridden; first by the acutely beveled edges of the mbJ - 2 -10'79104 lens being removed an<l re~lsced and secondly by similar acutely beveled edges of the replacement lens. Wear, chipping and cracking of the holding tabs, if not complete breaking away from the frame, quickly renders the frame incapable of properly supporting its lenses.
Thus, the intended convenience and economical advantage of being able to readily replace and dispose of damaged lenses is largely defeated by short effective frame life.
It is, accordingly, an object of the present invention to obviate the ordinary time-consuming and costly heating and rim-stretching operations required for damaged lens replacement in safety eyewear and, more particularly, to improve over schemes currently used for snap-in lens replacement with finger pressure. In this latter respect, an objective is to provide a safety lens system wherewith removal and replacement of lenses can be accomplished with finger pressure alone but without undue wear and/or other damage to the more costly frame component of the spectacles system and further wherewith wear and/or damage incurred by lens removal and replacement will be preferentially imparted to the already damaged and disposable lens element in each case. This allows long-term frame life and economic feasibility in the use of expensive but higher quality and better fitting frames in safety spectacles.
A more general obiect is to provide for simple, quick and economical removal and replacement of damaged lenses in safety spectacles wherewith any and all wear and/or other abuses of parts occurring during lens removal mb~ ~ - 3 -iO79104 and replacement nre substantially completely, if not totally, applied to the lenses being discarded rather than to the ~ore costly reusable lens-supporting frames.
Other objects and advantages of the invention will become apparent from the following summary of the invention and description of its preferred embodiments.
mb/ - 3a -10791~
RY (:)F TIIF. l N~ll.N'l`ION
The foregoing objectives and their corollaries are accomplished by the provision of safety spectacles having manually replaceable lenses comprising: a frame front having a pair of rims each internally recessed to receive a lens, the recess in each rim being of a preselected peripheral configuration and including a plurality of spaced slots extending therebeyond into the rim; a lens manually insertable into each of the rims, the lens having a peripheral shape and size substantially matching the configuration of the recess in each case and further having radially extending tabs at points correspond-ing to locations of the slots in the recess, the tabs being extendable into the slots to secure the lens in the safety spectacles. By such means, immediate replacement of scratched, spattered, cracked or otherwise damaged lenses may be accomplished by the wearer without the need for tools, special equipment or training and with minimal time away from the job. These slots which obviate the need for prior art lens-retaining tabs, minimize, if not eliminate, wear upon the spectacles frame and afford exceptionally long useful frame life regardless of frequency of lens replacement, Details of the invention will become more readily apparent from the following description when taken in conjunction with the accompanying drawings, I~ THE DRAWI~GS
Fig. 1 is a fragmentary front elevational view of a preferred embodiment of the invention;
mbl- - 4 -107910~
F;g, 2 is a fron~ elevational view of a type of lens intended for use in the spectacles depicted in Fig, 1 and Fig. 3 is an enlarged cross-sectional view taken generally a].ong line 3-3 of Fig, 1 wi.th an intermediate portion thereof broken away for convenlence of illustration.
mbl, - 4a -1~79~04 DESCRIPTION OF THE PREFERRED EMBODIMENTS
_ Spectacles 10 (Figs. 1 and 3) comprise frame front 12 and disposable lenses 14 which are readily removable and replaceable in front 12 according to the invention. The size, shape and general styling of frame front 12 here shown has been selected merely for purposes of illustration, it being understood that various modifications may be made within the scope of the invention, the crux of which relates to a uniqueness in the construction of lens rims 16 of frame 12 and lenses 14 intended to be detachably fitted thereinto.
It will become apparent as this description progresses that bridge 18, endpieces 20 and rims 16 may be of any size and/or shape desired and preferably, but not necessarily, of heavier and/or more rigid construction than that used for ordinary streetwear.
Front 12 is provided with a temple 22 hinged to and extending rearwardly from each endpiece 20 for supporting the structure upon the face of a wearer in conventional fashion.
Frame front 12 may be cast, molded, punched and/or machined to shape and size. Finishing would normally include polishing with tumbling and/or buffing operations. Front 12 may be formed of cellulose acetate, butyrate or propionate and lenses 12 may be formed of an optical quality acrylic (e.g. Plexiglas ~, propionate or polycarbonate. Other materials known and used in the spectacles frame and lens art may, of course, be used.
mb/ - S -iO79104 Referring more particularly to structural details of spectacles 10, it can be seen in Figs. 1 and 3 that rims 16 of frame front 12 are each provided with an internal lens-receiving recess 24 having a generally L-shaped cross-sectional configuration.
At preselected points about recess 24 the frame is deepened in the form of slots 26, three of which have been illustrated in each rim 16. It should be understood that greater or lesser numbers of slots 26 may be provided, if desired. Referring more particularly to Fig. 3, it can be seen that slots 26 have a V-shaped cross-sectional configuration.
~hile various other shapes may be used, this V-shape is preferred for reasons which will become more apparent as this description progresses.
Disposable lenses 14 intended for use with frame front 12, one of which is illustrated separately in Fig. 2, are preferably of a meniscus or other concavo~
convex cross-sectional configuration having a peripheral shape and size adapted to match and fit freely into L-shaped recess 24 against shoulder 28 thereof substantially as illustrated with full lines in Fig. 3.
At locations about the edge of lens 14 which correspond to positions of slots 26 in frame front 12, tabs 30 of a generally V-shaped, i.e. bevelled, configuration ~Fig. 3) are provided. These tabs, as integral extensions of lens 12 in each case, retain the lens in place when entered into corresponding slots 26 of frame front 12.
mb/ - 6 -10'~910~
The bevelled external configuration of tabs 30 permits easy entrance thereof into slots 26. With the lens centered in recess 24, pressure of the fingers against its convex side adjacent one or more of tabs 30 will effect a "snap-in" mounting thereof in frame front 12. Similarly, removal of the lens for disposal and replacement may be effected by pressing the fingers against the concave or rear surface of the lens adjacent one or more of tabs 30. Accordingly, spattered, cracked, scratched, fractured or otherwise damaged lenses 14 may be quickly and easily removed, discarded and replaced without the need for tools and/or special skills and with minimal loss of time on the job.
The leading edges 32 (Fig. 3) of slots 26 are smoothly rounded to facilitate entrance of tabs 30 and these rounded edges are supported by a substantial thickness of rim material so that lens tabs 30 prefer-entially receive substantially all wear and/or damage which may result from their resistance to entrance into or removal from slots 26. Thus, frame front 12 can withstand a great multiplicity, if not unlimited, lens replacement operations without appreciable wear or sacrifice of its original lens-retaining capabilities.
Dot-dash outline of lens 14 in Fig. 3 illustrates a manner in which the lens may be entered into rims 16.
By first entering an edge of lens 14 oppositely of a preselected tab 30 (e.g. the top edge of lens 14) partially or fully into L-shaped recess 24, finger pressure applied adiacent the opposite tab, e.g. as illustrated by arrow 34 mb/ - 7 -~079104 will force tab 30 into its corresponding slot 26.
It is contemplated that users of spectacles 10 be provided with a supply of replacement lenses for on-the-jobreplacement and disposal of damaged lenses. Furthermore, the long useful life of frame front 12 that can be expected offers the opportunity to supply, without economic hardship, higher quality, better fitting and more comfortable spectacles frame structures than the short term, less expensive but inferior products, Those skilled in the art will readily appreciate that there are various other modifications and adaptations of the precise form of the invention here shown which may suit particular requirements.
Accordingly, the foregoing illustrations are not to be interpreted as restrictive of the invention beyond that necessitated by the following claims.
mbJ - 8 -
Claims (6)
- THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
l. Safety spectacles having manually replace-able lenses comprising:
a frame front having a pair of rims each internally recessed to receive a lens, the recess in each rim being of a preselected peripheral configuration and including a plurality of spaced slots extending therebeyond into said rim;
a lens manually insertable into each of said rims, said lens having a peripheral shape and size substantially matching said configuration of said recess in each case and further having radially extending tabs at points corresponding to locations of said slots in said recess, said tabs being extendable into said slots to secure said lens in said safety spectacles. - 2. Safety spectacles according to claim 1 wherein said recess in each rim is of a generally L-shaped configuration opening at the forward side of said frame front and extending substantially right-angularly inwardly of said rim adjacent the rearward side of said frame as a shoulder against which a lens may be seated when secured in place in said spectacles.
- 3. Safety spectacles according to claim 1 wherein the extensions of said slots into said rims are of a V-shaped configuration.
- 4. Safety spectacles according to claim 3 wherein said tabs on said lenses are bevelled for fitting deeply into said slots.
- 5. Safety spectacles according to claim 1 wherein said slots and corresponding tabs on said lenses in each case comprise a minimum of two.
- 6. Safety spectacles according to claim 1 wherein said lenses are formed of an economically disposable plastic material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68865676A | 1976-05-21 | 1976-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1079104A true CA1079104A (en) | 1980-06-10 |
Family
ID=24765245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA276,864A Expired CA1079104A (en) | 1976-05-21 | 1977-04-25 | Safety spectacles |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS6015042B2 (en) |
| CA (1) | CA1079104A (en) |
| DE (1) | DE2717967C2 (en) |
| FR (1) | FR2352317A1 (en) |
| GB (1) | GB1583222A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4338004A (en) * | 1979-11-09 | 1982-07-06 | Vosper George W | Snap-in lens for glasses |
| JPS5753714A (en) * | 1980-09-16 | 1982-03-30 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber connector |
| DE3104569A1 (en) * | 1981-02-10 | 1982-09-09 | Hans-Hellmut Ing.(grad.) 2061 Sülfeld Ernst | Modular system for spectacles |
| JPH0745051Y2 (en) * | 1983-09-02 | 1995-10-11 | オリンパス光学工業株式会社 | Filter holding frame |
| JPS61154925U (en) * | 1985-03-15 | 1986-09-26 | ||
| DE102004035592A1 (en) * | 2004-07-22 | 2006-03-16 | Nigura Optik Gmbh | Spectacles e.g. sports glass, has lenses that are insertable into convexity of groove of frame by expansion connection in recess of seat bridge, where lateral contact surfaces of recess have bevels for force-fit retention of lenses |
| JP4929420B1 (en) * | 2011-12-21 | 2012-05-09 | 一成 大浦 | Auxiliary lens fitting glasses |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1520977A (en) * | 1921-06-22 | 1924-12-30 | Bausch & Lomb | Ophthalmic mounting |
| US2184427A (en) * | 1937-12-27 | 1939-12-26 | Bausch & Lomb | Ophthalmic mounting |
| US2574839A (en) * | 1948-08-31 | 1951-11-13 | Harold H Pelzer | Spectacle lens mount |
-
1977
- 1977-04-21 DE DE19772717967 patent/DE2717967C2/en not_active Expired
- 1977-04-25 CA CA276,864A patent/CA1079104A/en not_active Expired
- 1977-05-02 FR FR7713164A patent/FR2352317A1/en active Granted
- 1977-05-10 GB GB1960377A patent/GB1583222A/en not_active Expired
- 1977-05-18 JP JP5648377A patent/JPS6015042B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2717967A1 (en) | 1977-12-01 |
| FR2352317A1 (en) | 1977-12-16 |
| FR2352317B1 (en) | 1981-12-18 |
| DE2717967C2 (en) | 1986-11-27 |
| JPS52143045A (en) | 1977-11-29 |
| JPS6015042B2 (en) | 1985-04-17 |
| GB1583222A (en) | 1981-01-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |