EP0156898A1 - Folding optical devices such as binoculars - Google Patents

Folding optical devices such as binoculars

Info

Publication number
EP0156898A1
EP0156898A1 EP19840903724 EP84903724A EP0156898A1 EP 0156898 A1 EP0156898 A1 EP 0156898A1 EP 19840903724 EP19840903724 EP 19840903724 EP 84903724 A EP84903724 A EP 84903724A EP 0156898 A1 EP0156898 A1 EP 0156898A1
Authority
EP
European Patent Office
Prior art keywords
lenses
optical means
resilient
panels
wall
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.)
Withdrawn
Application number
EP19840903724
Other languages
German (de)
French (fr)
Inventor
John R. Holliday
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0156898A1 publication Critical patent/EP0156898A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
    • G02B23/18—Housings; Caps; Mountings; Supports, e.g. with counterweight for binocular arrangements

Definitions

  • This invention relates to optical devices, and particularly to foldable and focusable binoculars.
  • An object of the invention is to avoid the disadvantages of the aforementioned devices.
  • Another object of the invention is to provide inexpensive, compact, foldable, and focusable optical devices, such as binoculars.
  • movement of the lenses towards each other increases the convexity of the arrangement and allows the entire binoculars to be folded flat.
  • the alignment of the lenses is maintained by a portion of the arrangement which connects the lenses, but extends in a direction concave to the space between, the lenses.
  • two objective and two ocular lenses are provided.
  • Fig. 1 is a perspective view of a binocular emobodying features of the invention.
  • Fig. 2 is a section II-II of the binocular of Fig. 1.
  • Fig. 3 is a section III-III of the binocular in Fig. 1.
  • Fig. 4 is a plan view of a single cardboard sheet which is cut and. folded to form the frame of the binocular in Figs. 1 to 3.
  • Fig. 5 is an exploded view of a hinge formed in the binocular of Figs. 1 to 3.
  • Fig. 6 is a perspective view of the connection in Fig. 5 when actually interlocked.
  • Fig. 7 illustrates the binocular of Figs. 1 to 3 in a folded stowable position.
  • Fig. 8 is a section similar to III-III of another binocular embodying the invention.
  • Fig. 9 is a section II-II of the binocular in Figs. 1 to 3 when folded, or collapsed to the condition shown in Fig. 7.
  • Fig. 10 is a somewhat schematic section III-III of the binocular in Figs. 1 to 3 when transversely compressed to extend the front lenses as far from the rear lenses as possible and thus to produce maximum close-up focus.
  • Fig. 11 is a somewhat schematic section II-II of the binocular in Figs. 1 to 3 when compressed as in Fig. 10 for maximum close-up.
  • a single sheet 10 of cardboard cut as shown in Fig. 4 is folded, creased, interlocked, and glued into the shape shown in Figs. 1 to 3.
  • the cardboard is of the plastic-coated variety to prevent soiling during use.
  • the sheet is folded to form front and rear walls 12 and 14, a top front panel 16, a rear top panel 18, a bottom front panel 20, a bottom rear panel 22, a front left panel 24, a rear left panel 26, a front right panel 28, a rear right panel 30, and an overhang panel 32.
  • the overhang panel 32 is fastened by glue to the forward edge of the upper front panel 16.
  • the front wall 12 supports a rectangular plastic optical element 34 which is molded into a flat plate throughout most of its length and into two integral convex lenses 36 and 38 whose front faces 40 and 42 project through suitable openings 44 and 48 in the front wall. Glue or other adhesive fixes element 34 to the front wall 12.
  • the rear wall 14 supports a plastic optical element 50 which is molded -to be substantially flat and rectangular along its length, but integrally forms two concave lenses 52 and 54 aligned respectively with lenses 36 and 38 and with two holes OH in the rear wall 14.
  • the panels 16 and 18 form a roof-shaped connection between the walls 12 and 14 by virtue of the crease 60 between the panels 16 and 18, and the panels 20 and 22 similarly form an inverse roof-shaped connection between the walls 12 and 14 by virtue of the crease 62 between the latter two panels.
  • the panels 16, 18, 20, and 22 thus form a convex structure relative to the space between, the lens elements 34 and 50.
  • the panels 24, 26, 28, and 30 are bent inwardly so as to form concave structure between the walls 12 and 14.
  • the panels 24 and 26 as well as 28 and 30 each contains a cut 55 and 56 that extends approximately half way into the panel so that the panels can be made to interlock as shown in somewhat exaggerated form in Fig. 6.
  • the user By pressing the wall 12 against the wall 14, the user folds the entire binocular into the compact, flat shape shown in Fig. 7 and in Fig. 9.
  • the binoculars of Figs. 1 to 3 are normally stored, and carried in the folded form shown in Figs. 7 and 9.
  • an envelope is provided into which the binocular is slipped.
  • a user withdraws the binoculars from the envelope he or she presses with the thumb and fingers in the direction shown by the arrows 57 and 58 to spread the front and rear walls 12 and 14 away from each other so that the structure, takes the shape shown in Figs. 1 to 3.
  • the crease 60 in the cardboard sheet 10 between the panels 16 and 18, as well as the panels 20 and 22 is creased and folded tightly so that the normal storage condition of the structure as shown in- Fig. 7 creates a heavily outward bias to the roof section composed of panels 16 and 18 and the roof section composed of panels 20 and 22. That is, the peak of the upper roof section tends to rise up while the peak of the inverted roof section tends to go down. This gives the user the opportunity to hold the binocular by placing the finger on the panels 16 and 18 with the thumb near the crease 62 between the panels 20 and 22, while holding the binocular with the ocular lenses 52 and 54 near the user's eyes.
  • objective and front lenses refers to lenses 36 and 38 which are intended to face the object being viewed.
  • ocular and rear lenses refers to the lenses 52 and 54 intended to be placed next to the eyes for ' iewing.
  • the binocular is folded from the position shown in Figs. 1 to 3 towards the position in Fig. 7 by pressing the front wall 12 toward the rear wall 14, the panels 24 to 30 fold inwardly until the panel 24 lies against the panel 26 and. the panel 28 lies against the panel 30 and all the panels lie between the lens elements 34 and 50.
  • the panels 24 to 30 thereby prevent the lenses 36 and 42 from contacting the lenses 52 and 54 and. thereby inhibit scratching of the lenses by the other lenses.
  • the cardboard sheet 10 shown in Fig. 4 is cut from a blank with the holes 44 and 48 for the lenses 36 and 38 and holes OH for the lenses 52. and 54. .
  • the manufacturing process further involves, although not necessarily in. the order indicated, creasing the cut blank sheet 10 at lines 60, 62, 64, 66, 68, 70, 72, 74, 76, and 78, with a press or the like, gluing the bottom of the flap 16 to the top of the flap 32, interlocking the panels 24 to 30, gluing the lens elements 34 and 50 to the walls 12 and 14, and folding the binocular to the shape shown in Fig. 7.
  • the folds are such as to maintain the outward resilience of the creases (or folds) 60 and 62.
  • the binoculars continue to exhibit an outward bias that allows the user to hold the binoculars as he or she presses and releases the panels at the folds 60 and 62 for the purpose of focusing.
  • the distances are related to the focal lengths of the lenses 36, 38, 52, and 54 so that the binoculars are focused upon the most close-up position when the creases 60 and 62 are squeezed virtually flat, and focused upon infinity when the panels 16, 18, 20, and 22 are released into a roof-like position convex relative to the space, between the lenses.
  • the side panels 24, 26, 28, and 30 are also substantially flat.
  • the cuts 55 and 56 in the panels 24 to 30 are sufficiently far from the walls 10 and 12 so that the panels 16-22 project slightly inward toward the space between the lenses when the creases 60 and 62 at the panels 16 to 20 have been pressed flat by forces in the direction of arrows 57, 58. This prevents the panels 16 to 20 from being pressed into the space between the elements 34 and 50. It maintains the resilience of the creases that bias the panels 16 to 22 outwardly of the space between the lens elements 34 and 50.
  • the flap 32 and the portion to which it is glued on the flap 16 form a sun shade for light entering the lenses 36 and 38.
  • the binoculars, when folded flat, are normally stored in an envelope, such protection may not be necessary.
  • the overlap may occur at the crease 60 as shown in Fig. 8 or at the crease 62.
  • Fig. 9 shows the binocular of Figs. 1 to 3 folded as in Fig. 7 by pressing wall 12 toward wall 14. It is similar to Fig. 7 in that it illustrates a section, but the section is horizontal rather than vertical as in Fig. 7. The panels 24 to 30 are folded completely in the now narrow space between the elements 34 and 50 which are shown only schematically.
  • Figs. 10 and 11 are vertical and horizontal sections of the binoculars in Figs. 1 to 3, and correspond respectively to Figs. 3 and 2, but show the binocular with the panels 16 and 18 as well as 20 and 22 compressed at creases 60 and 62 by finger pressure so that the panels 16 and 18 are flat and the panels 20 and 22 are flat between the walls 12 and 14. Similarly, the panels 24 and 26 are flat and the panels 28 and 30 are substantially flat between the walls 12 and 14. In this portion the lens elements 34 and 50 are as far as possible from each other and in their maximum close-up position of focus.

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Telescopes (AREA)

Abstract

Le dispositif ci-décrit se compose d'un élément optique antérieur (34) et d'un élément optique postérieur (50) reliés par une structure élastique modifiant, lorsqu'elle est comprimée, le foyer des éléments optiques. Plus spécifiquement, des jumelles sont pourvues de lentilles d'objectif (36,38) et de lentilles oculaires (52, 54) montées sur les parois opposées (12, 14) d'une structure élastique hexagonale (12, 14, 16, 18, 20, 22) pouvant être compriméee pour modifier la distance entre les lentilles. Les parois sont maintenues parallèles par des panneaux latéraux (24, 26, 28, 30) qui s'emboîtent dans des fentes (55, 56) et font saillie à l'intérieur de l'espace entre les parois antérieure et postérieure. Toute la structure peut être pliée à plat en déplaçant la paroi antérieure contre la paroi postérieure, de sorte que les panneaux latéraux (24, 26, 28, 30) se replient entre les parois antérieure et postérieure et que les panneaux du sommet (16, 18) se replient l'un contre l'autre, de même que les panneaux du fond (20, 22). Un cache (32) sur les lentilles d'objectif les protège lorsque le dispositif est replié.The device described below consists of an anterior optical element (34) and a posterior optical element (50) connected by an elastic structure modifying, when compressed, the focus of the optical elements. More specifically, binoculars are provided with objective lenses (36,38) and ocular lenses (52, 54) mounted on the opposite walls (12, 14) of a hexagonal elastic structure (12, 14, 16, 18 , 20, 22) can be compressed to change the distance between the lenses. The walls are held parallel by side panels (24, 26, 28, 30) which fit into slots (55, 56) and protrude inside the space between the front and rear walls. The entire structure can be folded flat by moving the front wall against the rear wall, so that the side panels (24, 26, 28, 30) fold between the front and back walls and the top panels (16, 18) fold against each other, as do the bottom panels (20, 22). A cover (32) on the objective lenses protects them when the device is folded.

Description

FOLDING OPTICAL DEVICES SUCH AS BINOCULARS
BACKGROUND OF THE INVENTION:
This invention relates to optical devices, and particularly to foldable and focusable binoculars.
In recent years, the portability of binoculars has been enhanced by various means of retracting and folding lenses as well as by arrangements for changing the optical paths. However, this has not resulted in truly-light and inexpensive binoculars which are capable of being focused. Compact focusable binoculars are generally heavy.
An attempt has recently been made .to introduce light binoculars composed of objective and ocular lenses supported in a rigid cardboard frame which, when disassembled, folds into a flat package. However, such binoculars have a fixed focus. Aside from the inconvenience created for the user, the fixed focus places a burden of manufacturing accuracy upon the cutting and folding machinery for the cardboard frame supporting the lens. An inaccurate cut or fold, by the manufacturer or user, could result in a permanently defocused condition which would make the binoculars substantially useless.
SUMMARY OF THE INVENTION:
An object of the invention is to avoid the disadvantages of the aforementioned devices.
Another object of the invention is to provide inexpensive, compact, foldable, and focusable optical devices, such as binoculars.
These objects are attained in whole or in part by connecting ocular and objective lenses with a resilient arrangement projecting in a direction convex to the space between the lenses so that compression of the resilient arrangement in the direction of the space changes the distance between the lenses.
According to another feature of the invention, movement of the lenses towards each other increases the convexity of the arrangement and allows the entire binoculars to be folded flat.
According to, another feature of the invention, the alignment of the lenses is maintained by a portion of the arrangement which connects the lenses, but extends in a direction concave to the space between, the lenses.
According to another feature of the invention, two objective and two ocular lenses are provided.
These and other features of the invention are pointed out in. the claims. Other objects and advantages of the invention will become evident from the following detailed description when read in light of the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS:
Fig. 1 is a perspective view of a binocular emobodying features of the invention.
Fig. 2 is a section II-II of the binocular of Fig. 1.
Fig. 3 is a section III-III of the binocular in Fig. 1.
Fig. 4 is a plan view of a single cardboard sheet which is cut and. folded to form the frame of the binocular in Figs. 1 to 3. Fig. 5 is an exploded view of a hinge formed in the binocular of Figs. 1 to 3.
Fig. 6 is a perspective view of the connection in Fig. 5 when actually interlocked.
Fig. 7 illustrates the binocular of Figs. 1 to 3 in a folded stowable position.
Fig. 8 is a section similar to III-III of another binocular embodying the invention.
Fig. 9 is a section II-II of the binocular in Figs. 1 to 3 when folded, or collapsed to the condition shown in Fig. 7.
Fig. 10 is a somewhat schematic section III-III of the binocular in Figs. 1 to 3 when transversely compressed to extend the front lenses as far from the rear lenses as possible and thus to produce maximum close-up focus.
Fig. 11 is a somewhat schematic section II-II of the binocular in Figs. 1 to 3 when compressed as in Fig. 10 for maximum close-up.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS:
In Figs. 1 to 3, a single sheet 10 of cardboard cut as shown in Fig. 4 is folded, creased, interlocked, and glued into the shape shown in Figs. 1 to 3. Preferably, the cardboard is of the plastic-coated variety to prevent soiling during use. The sheet is folded to form front and rear walls 12 and 14, a top front panel 16, a rear top panel 18, a bottom front panel 20, a bottom rear panel 22, a front left panel 24, a rear left panel 26, a front right panel 28, a rear right panel 30, and an overhang panel 32. The overhang panel 32 is fastened by glue to the forward edge of the upper front panel 16. The front wall 12 supports a rectangular plastic optical element 34 which is molded into a flat plate throughout most of its length and into two integral convex lenses 36 and 38 whose front faces 40 and 42 project through suitable openings 44 and 48 in the front wall. Glue or other adhesive fixes element 34 to the front wall 12.
Similarly, the rear wall 14 supports a plastic optical element 50 which is molded -to be substantially flat and rectangular along its length, but integrally forms two concave lenses 52 and 54 aligned respectively with lenses 36 and 38 and with two holes OH in the rear wall 14.
The panels 16 and 18 form a roof-shaped connection between the walls 12 and 14 by virtue of the crease 60 between the panels 16 and 18, and the panels 20 and 22 similarly form an inverse roof-shaped connection between the walls 12 and 14 by virtue of the crease 62 between the latter two panels. The panels 16, 18, 20, and 22 thus form a convex structure relative to the space between, the lens elements 34 and 50. On the other hand, the panels 24, 26, 28, and 30 are bent inwardly so as to form concave structure between the walls 12 and 14. The panels 24 and 26 as well as 28 and 30 each contains a cut 55 and 56 that extends approximately half way into the panel so that the panels can be made to interlock as shown in somewhat exaggerated form in Fig. 6.
By pressing the wall 12 against the wall 14, the user folds the entire binocular into the compact, flat shape shown in Fig. 7 and in Fig. 9. The binoculars of Figs. 1 to 3 are normally stored, and carried in the folded form shown in Figs. 7 and 9. For convenience, an envelope is provided into which the binocular is slipped. When a user withdraws the binoculars from the envelope, he or she presses with the thumb and fingers in the direction shown by the arrows 57 and 58 to spread the front and rear walls 12 and 14 away from each other so that the structure, takes the shape shown in Figs. 1 to 3. The crease 60 in the cardboard sheet 10 between the panels 16 and 18, as well as the panels 20 and 22 is creased and folded tightly so that the normal storage condition of the structure as shown in- Fig. 7 creates a heavily outward bias to the roof section composed of panels 16 and 18 and the roof section composed of panels 20 and 22. That is, the peak of the upper roof section tends to rise up while the peak of the inverted roof section tends to go down. This gives the user the opportunity to hold the binocular by placing the finger on the panels 16 and 18 with the thumb near the crease 62 between the panels 20 and 22, while holding the binocular with the ocular lenses 52 and 54 near the user's eyes. The user then can squeeze the arrangement between the crease 60 (at the junction of panels 16 and 18) and the crease 62 (at the junction of the panels 20 and 22). The squeezing and releasing changes the distance between the lenses 38 and 54 and between the lenses 36 and 52 so as to change the focusing action of the lenses.
As used herein, the terms objective and front lenses refers to lenses 36 and 38 which are intended to face the object being viewed. The terms ocular and rear lenses refers to the lenses 52 and 54 intended to be placed next to the eyes for' iewing.
The panels 24, 26, 28, and 30, when interlocked, maintain an approximately parallel relationship between the walls 12 and 14 during the focusing adjustment. Naturally, the. panels 24 to 30 move relative to each other during the focusing adjustment, but nevertheless, maintain the relationship. As the binocular is folded from the position shown in Figs. 1 to 3 towards the position in Fig. 7 by pressing the front wall 12 toward the rear wall 14, the panels 24 to 30 fold inwardly until the panel 24 lies against the panel 26 and. the panel 28 lies against the panel 30 and all the panels lie between the lens elements 34 and 50. The panels 24 to 30 thereby prevent the lenses 36 and 42 from contacting the lenses 52 and 54 and. thereby inhibit scratching of the lenses by the other lenses.
In manufacture, the cardboard sheet 10 shown in Fig. 4 is cut from a blank with the holes 44 and 48 for the lenses 36 and 38 and holes OH for the lenses 52. and 54. .The manufacturing process further involves, although not necessarily in. the order indicated, creasing the cut blank sheet 10 at lines 60, 62, 64, 66, 68, 70, 72, 74, 76, and 78, with a press or the like, gluing the bottom of the flap 16 to the top of the flap 32, interlocking the panels 24 to 30, gluing the lens elements 34 and 50 to the walls 12 and 14, and folding the binocular to the shape shown in Fig. 7. Preferably, the folds are such as to maintain the outward resilience of the creases (or folds) 60 and 62. In this way, as the user squeezes the binoculars between the folds 60 and 62, the binoculars continue to exhibit an outward bias that allows the user to hold the binoculars as he or she presses and releases the panels at the folds 60 and 62 for the purpose of focusing. The distances are related to the focal lengths of the lenses 36, 38, 52, and 54 so that the binoculars are focused upon the most close-up position when the creases 60 and 62 are squeezed virtually flat, and focused upon infinity when the panels 16, 18, 20, and 22 are released into a roof-like position convex relative to the space, between the lenses. When the binoculars are squeezed so that the panels 16 and 18 at the crease 60 and the panels 20 and 22 at the crease 62 are substantially flat from wall 12 to wall 14, the side panels 24, 26, 28, and 30 are also substantially flat. According to one embodiment of the invention, the cuts 55 and 56 in the panels 24 to 30 are sufficiently far from the walls 10 and 12 so that the panels 16-22 project slightly inward toward the space between the lenses when the creases 60 and 62 at the panels 16 to 20 have been pressed flat by forces in the direction of arrows 57, 58. This prevents the panels 16 to 20 from being pressed into the space between the elements 34 and 50. It maintains the resilience of the creases that bias the panels 16 to 22 outwardly of the space between the lens elements 34 and 50.
The flap 32 and the portion to which it is glued on the flap 16 form a sun shade for light entering the lenses 36 and 38. These flaps 32 and 16, when the binoculars are folded into the carrying shape shown in Fig. 7, also cover the lenses 36 and 38 and prevent their scratching. However, because the binoculars, when folded flat, are normally stored in an envelope, such protection may not be necessary. For this reason, according to an embodiment of the invention, the overlap may occur at the crease 60 as shown in Fig. 8 or at the crease 62.
Fig. 9 shows the binocular of Figs. 1 to 3 folded as in Fig. 7 by pressing wall 12 toward wall 14. It is similar to Fig. 7 in that it illustrates a section, but the section is horizontal rather than vertical as in Fig. 7. The panels 24 to 30 are folded completely in the now narrow space between the elements 34 and 50 which are shown only schematically.
Figs. 10 and 11 are vertical and horizontal sections of the binoculars in Figs. 1 to 3, and correspond respectively to Figs. 3 and 2, but show the binocular with the panels 16 and 18 as well as 20 and 22 compressed at creases 60 and 62 by finger pressure so that the panels 16 and 18 are flat and the panels 20 and 22 are flat between the walls 12 and 14. Similarly, the panels 24 and 26 are flat and the panels 28 and 30 are substantially flat between the walls 12 and 14. In this portion the lens elements 34 and 50 are as far as possible from each other and in their maximum close-up position of focus.
While embodiments of the invention have been described in detail, it will be evident to those skilled in the art that the invention may be embodied otherwise without departing from its. spirit and scope.

Claims

WHAT IS CLAIMED IS:
1. An optical device, comprising:
first optical means,
second optical means,
resilient means for connecting said first optical means with said second optical means,
said resilient means being arranged to hold said optical means so that said first and second optical means are aligned and to extend convexly relative to a space between said optical means so that compression of said resilient means changes the distance between said first and second optical means.
2. A devices as in claim 1, wherein
said first optical means includes a first pair of lenses,
said second optical means includes a second pair of lenses, and
said resilient means aligns said first and second lenses so that said lenses can produce binocular images.
3. An optical device as in claim 1, wherein
said resilient means includes a first wall for holding said first optical means, a second wall for holding said second optical means,
said walls each having upper and lower edges,
a resilient arrangement extending outwardly relative to a space between said first and second optical means between the upper edge of said first wall and the upper edge of said second wall,
a second resilient arrangement extending convex of a space between said first optical means and said second optical means and connecting the lower edges of said first wall and said second wall.
4. A device as in claim 3, wherein
said first optical means includes a first pair of lenses,
said second optical means includes a second pair or lenses, and
said resilient means aligns said first and second lenses so that said lenses can produce binocular images.
5. A device as in claim 3, wherein
said first resilient arrangement includes a pair of panels joined resiliently to form a roof-like shape when the binocular is being used; and
said second resilient arrangement includes a pair of panels forming a reverse roof-like shape and joined resiliently with each other.
6. A device as in claim 5, wherein
said first optical means includes a first pair of lenses,
said second optical means includes a second pair of lenses, and
said resilient means aligns said first and second lenses so that said lenses can rJroduce binocular images.
7. A device as in claim 6, wherein
said walls each include side edges,
said resilient means includes a pair of panel arrangements folding into the space between said first and second optical means and each connecting a side edge of the front wall with a side edge of the back wall.
8. A device as in claim 6, wherein
said resilient means are foldable into a flat shape by pressing said first wall against said second wall and folding said resilient means where the panels join each other, and
said first resilient means and said second resilient means are pressable toward each other so as to change the distance between said first optical means and said second optical means so as to perform a focusing function.
9. A device as in claim 8, wherein said walls each include side edges,
said resilient means includes a pair of panel arrangements folding into the space between said first and second optical means and. each connecting a side edge of the front wall with a side edge of the back wall.
10. A device as in claim 5, wherein
a panel of said first resilient means extends beyond the outer surface of the first wall so as to form a shade for said first optical means.
11. A device as in claim 9, wherein
a panel of said first resilient means extends beyond the outer surface of the first wall so as to form a shade for said first optical means; and
said panel covers said first optical means when said resilient means is folded to the flat position.
12. A device as in claim 6, wherein
said resilient means is formed of a single sheet of resilient material.
13. A device as in claim 8, wherein
said resilient means is formed of a single sheet of resilient material.
14. A device as in claim 10, wherein said resilient means is formed of a single sheet of resilient material.
15. A device as in claim 7, wherein
said panels of sidewalls form cuts which interlock with each other to establish the connection between an edge of the front wall and an edge of the back wall.
16. A device as in claim 12, wherein
said panels of sidewalls form cuts which interlock with each other to establish the connection between an edge of the front wall and an edge of the back wall.
17. A device as in claim 13, wherein
said panels of sidewalls form cuts which interlock with each other to establish the connection between an edge of the front wall and an edge of the back wall.
18. A device as in claim 14, wherein
said panels of sidewalls form cuts which interlock with each other to establish the connection between an edge of the front wall and an edge of the back wall.
19. A device as in claim 18, wherein
said side panels are sufficiently long to extend into the space between said walls when said top panels and said bottom panels have been squeezed into substantially flat positions between said walls .
EP19840903724 1983-08-29 1984-08-28 Folding optical devices such as binoculars Withdrawn EP0156898A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52763283A 1983-08-29 1983-08-29
US527632 1983-08-29

Publications (1)

Publication Number Publication Date
EP0156898A1 true EP0156898A1 (en) 1985-10-09

Family

ID=24102301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840903724 Withdrawn EP0156898A1 (en) 1983-08-29 1984-08-28 Folding optical devices such as binoculars

Country Status (3)

Country Link
EP (1) EP0156898A1 (en)
AU (1) AU3504984A (en)
WO (1) WO1985001121A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773747A (en) * 1986-04-07 1988-09-27 Innovational Products Co., Inc. Foldable binocular and blank therefor
JPH0442815Y2 (en) * 1988-10-06 1992-10-09
US4964709A (en) * 1989-03-27 1990-10-23 Custom Chrome, Inc. Foldable binoculars with enclosed side walls
US5557457A (en) * 1994-07-25 1996-09-17 Esperti; Anthony Folding binocular apparatus and binocular blank
DE20200288U1 (en) * 2002-01-10 2002-03-21 Liedtke Joachim binoculars

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4239328A (en) * 1977-12-10 1980-12-16 Justice Harry L Jr Collapsible binocular and blank therefor
US4268111A (en) * 1979-08-27 1981-05-19 Green John R Foldable binoculars
US4443071A (en) * 1981-12-07 1984-04-17 Kosaku Ueda Collapsible telescope

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8501121A1 *

Also Published As

Publication number Publication date
WO1985001121A1 (en) 1985-03-14
AU3504984A (en) 1985-03-29

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