US3839818A

US3839818A - Glider with automatically releasing foldable wings

Info

Publication number: US3839818A
Application number: US00407420A
Authority: US
Inventors: E Heggedal
Original assignee: Individual
Current assignee: Individual
Priority date: 1973-10-18
Filing date: 1973-10-18
Publication date: 1974-10-08
Anticipated expiration: 1991-10-08

Abstract

A toy glider with pivotally mounted wings movable from an extended, flight position to an overlapped, swept back, launch position is provided with axially movable weighted means for retaining the wings in the swept back position during launching against tension normally urging the wings toward the extended position and automatically releasing the wings to the extended position as the launched glider reaches a maximum altitude and noses down to begin its descent. The axially movable weighted means comprises an elongated rod suspended beneath the glider fuselage registering with means on the fuselage for limiting its back and forth movement, and having a concentrated weight attached thereto in general alignment with the extended wings. The amount and positioning of such concentrated weight influences the angle and range of the descent glide and means may be provided as by employing an axially adjustable weight for permitting the user to adjust and vary the flight characteristics of the glider.

Description

United States Patent [191 Heggedal 5] Oct. 8, 1974 GLIDER WITH AUTOMATICALLY RELEASING FOLDABLE WINGS [76] Inventor: Emil J. Heggedal, 140-50 Burden Cres., Jamaica, N.Y. 11435 [22] Filed: Oct. 18, 1973 [21] Appl. No.: 407,420

[52] US. Cl. 46/80 [51] Int. Cl A63h 27/00 [58] Field of Search 46/79, 80

[56] References Cited UNITED STATES PATENTS 3,380,189 4/1968 OMillian 46/80 3,654,729 4/1972 lmperato 46/80 Primary Examiner-Ant0nio F. Guida Assistant Examiner-Robert F. Cutting Attorney, Agent, or Firm-Howard E. Thompson, Jr.

[57] ABSTRACT A toy glider with pivotally mounted wings movable from an extended, flight position to an overlapped,

swept back, launch position is provided with axially movable weighted means for retaining the wings in the swept back position during launching against tension normally urging the wings toward the extended position and automatically releasing the wings to the extended position as the launched glider reaches a maximum altitude and noses down to begin its descent.

The axially movable weighted means comprises an elongated rod suspended beneath the glider fuselage registering with means onthe fuselage for limiting its back and forth movement, and having a concentrated weight attached thereto in general alignment with the extended wings. The amount and positioning of such concentrated weight influences the angle and range of the descent glide and means maybe provided as by employing an axially adjustable weight for permitting the user to adjust and vary the flight characteristics of the glider.

14 Claims, 6 Drawin gFigures GLIDER WITH AUTOMATICALLY RELEASING FOLDABLE WINGS BACKGROUND OF THE INVENTION This invention relates to a toy glider with pivotally mounted wings movable from an extended flight position to an overlapped, swept back, launch position and which is provided with axially movable weighted means for retaining the wings in the swept back position against tensional means normally urging the wings toward the extended position and automatically releasing the wings to the extended position as the launched glider reaches a maximum altitude and noses down to begin its descent.

The axially movable weighted means comprises an elongated rod suspended beneath the glider fuselage registering with means on the fuselage for limiting its back and forth movement and having a concentrated weight attached thereto in general alignment with the extended wings. In addition to providing longitudinal forward movement of the rod as the launched glider noses downwardly, thereby releasing the wings to the extended position, the amount and positioning of the concentrated weight in the forward position thereof influences the angle and range of the descent glide; and means is preferably provided, as by employing an axially adjustable weight, for permitting the user to adjust and vary the flight characteristics of the glider.

In its simplest form the glider comprises an elongated lightweight fuselage having a tail assembly at one end and an enlarged nose assembly at the other, the nose assembly suitably being an elongated body of tapered and streamlined configuration having an enlarged portion adjacent the fuselage which is somewhat wider and several times higher than the fuselage proper. At the juncture of the fuselage and nose section there is a planar surface perpendicularly oriented with respect to the fuselage and extending downwardly therefrom; and the nose section includes laterally extending tins of generally triangular swept back contour having trailing edges in alignment with said planar surface and providing extended wing stops on the nose section.

Other transverse extensions at the juncture of said fuselage and nose section and rearwardly of said planar surface provide pivot mountings for the wings with the plane of one wing being sufficiently above the plane of the other to permit free overlap of the wings in their folded, swept back position.

The elongated weighted rod is suitably mounted at its forward end in a forwardly extending recess in said planar surface and at its rear end by hanger means extending downwardly from the fuselage and aligned with a downwardly extending stop member restricting longitudinal movement of the rod.

The outer trailing edges or corners of the wings carry offset loops positioned so as to be engaged by said rod in its rearwardly extended position for retaining the wings in the folded position; and the forward movement of the rod under the influence of said weight as the launched glider noses downwardly disengages such loops thereby freeing the wings for movement to the extended, flight position.

Movement of the wings to the flight position is effected by resilient means extending from pointson the leading edges of the wings outwardly of the pivot mountings thereof to a point in the nose section forwardly of and preferably above said pivot mountings. The positioning of said point in the nose section and the mounting of the resilient means on the wing edges is such that the resilient means, as extended when moving the wings to the folded position, approaches but does not reach the pivot mountings of the wings. Thus, the tension in the resilient means exert an effective force for extending the wings while exerting little transverse force at the point of engagement of said wing tip loops with the movable retaining rod.

The glider can be simply launched by hand from a suitably elevated position or canbe projected to a desired height with elastic or other propelling means and portions of the nose end or tail section can be specially fashioned to appropriately cooperate with such launch assist means.

In more elaborate models of the glider means could be provided for jet or rocket assisted launching without departing from the basic wing retaining and release mechanism of the invention since, regardless of the altitude attained, the wings are automatically released to flight position as the nosing over of the glider to begin its'descent carries the weighted rod to its forward position. It is quite desirable, however, in more elaborate models that the mounting of the concentrated weight on the rod be such as to permit longitudinal adjustment of the weight center. This type of adjustment together with care in contouring of the wings and streamlining of the nose and tail assemblages can provide continuing interest as the toy glider then becomes an instrument of learning and experimentation in the characteristics of flight.

The invention will be more fully understood from consideration of the following description having reference to the accompanying drawing in which preferred adaptations of the invention have been illustrated with the various parts thereof identified by suitable reference characters in each of the views and in which:

FIG. 1 is a perspective view of the glider in extended wing position;

FIG. 2 is an enlarged and longitudinally shortened side elevation view of the glider with the wings in extended position;

FIG. 3 is a fragmentary sectional view taken substantially on the broken line 3,3 of FIG. 2;

FIG. 4 is a top view of the glider with the wings in the folded position;

FIG. 5 is a fragmentary view of a portion of the structure shown in FIG. 4 as seen from below; and

FIG. 6 is a fragmentary view of the weighted rod shown inFlGS. l and 2 illustrating details of a modified form of construction.

As illustrated in the drawing, particularly in FIGS. 1, 2 and 4, the improved glider 10 of the invention comprises an elongated fuselage 11 having a tail assembly 12 at one end thereof and an elongated streamlined nose section 13 at the other end thereof. The fuselage 11 has been shown of simple rectangular cross section as the minimum structure to appropriately space and position the tail assembly 12 and nose section 13 but it is to be understood that the fuselage can, if desired, be contoured to provide a more realistic airplane profile as viewed during flight. The central portion 13a of the nose section is enlarged to about twice the width and several times the height as the fuselage shown as clearly seenin FIGS. 2 and 3 of the drawing andis provided in the juncture of the nose section andfuselage 11 with a transversely extending

wing mount

14, 14a to which

wings

15, 15a are secured by

pivot forming means

16, 16a. In small models the pivot means can comprise simple plastic rods with capped ends though it is understood that in more elaborate models any suitable pivot forming means can be employed.

As seen in FIG. 3, wing mounting 14a has a downward offset with respect to wing mount 14 sufficiently to offset the

wings

15, 15a vertically to permit their free swinging movement from the extended flight position shown in FIGS. 1 and 2 to the swept back, launch position shown in FIG. 4.

In alignment with the front edge of the

wing mount

14, 14a, it will be seen in FIGS. 2 and 3 that the nose section 13 has planar surface 17 which is essentially perpendicular to the axis of the fuselage 11. The nose section 13 is also provided at opposite sides thereof and in alignment with each of the wings, with essentially triangular fms 18, 180 having swept back leading

edges

19, 19a and

trailing edges

20, 20a which are in common alignment with each other and with the planar surface 17. The

fins

18, 18a extend somewhat beyond the

wing mounts

14, 14a as clearly seen in FIG. 4 of the drawing and function as wing stops aiding in alignment of the wings when in extended, flight position.

The

fins

18, 18a, which preferably have rounded leading

edges

19, 19a and, as shown in FIG. 3 of the drawing, may be slightly staggered to align with the

wings

15, 15a to produce a maximum of streamlining effect. It is to be understood, however, that if desired, the fins 18, 180 can be made slightly thicker and ar ranged at transverse alignment so that wing 15 will engage the upper portion of tin 18 and wing 15a will engage the lower portion of fin 18a.

The leading

edges

21, 21a are provided outwardly of the

pivots

16, 16a with anchor means 22, 22a receiving ends of resiliently extendible

elongated strand members

23, 23a which extend to opposed sides of the nose section 13 at a point 24 which is located forwardly of and above the

wing mount

14, 14a. For ease of assembly and balancing of tensions in the

strands

23, 23a, the mounting point 24 can suitably comprising a passage through the nose section as seen in FIG. 3 slidably receiving a connecting strand portion 23b of a unitary resilient strand.

The

strands

23, 23a or the unitary strand 23b can in simpler models constitute a rubber or other elastic strand of appropriate resilience although it is to be understood that in more elaborate models other longitudinally extendible means such as coil springs or the like might be employed to provide the appropriate tensions for moving the wings, when released, from the swept back position shown in FIG. 4 to the extended flight position during flight. In order to accomplish this, the location of the nose mounting 24 and the

wing mounts

22, 22a must be such that the extended

strands

23, 23a or 23b, when the wings are in the folded position shown in FIG. 4, are disposed outwardly of the

pivots

16, 16a; and, as will be apparent when discussing the release mechanism, varying this distance, as by moving the

mounts

22, 22a closer to or further from the wing edges can influence the freedom of operation of the release mechanism.

The trailing edges of the

wings

15, 15a at the portions thereof adjacent the fuselage are shown as having cutouts 32, 320. These facilitate the folding and prevent protrusion of the

inner corners

33, 33a beyond the leading

edge

21a, 21 respectively of the opposed wing when in the folded position shown in FIG. 4.

The key to the unique operation of the improved glider resides in the unique mechanism for restraining the wings in the folded position and automatically releasing the same when a launched glider has reached the top of a climb and nosed down to begin a descent. This mechanism comprises an elongated rod 25 having a weight 26 fixedly secured thereto at a position in general alignment with the wings as shown in FIGS. 1 and 2 and having its forward end slidably engaging a deep recess 27 in planar surface 17 and its rear end supported from the fuselage l 1 by a bracket 28 to align the rear end 25a of the rod with a downwardly extending stop member 29 closely spaced from the bracket 28. As

will be seen in FIGS. 1 and 2 this suspends the rod 25 and weight 26 below the wings and fuselage for longitudinal movement along an axis substantially parallel to the axis of the fuselage. The length of the rod 25 is so related to the depth of the recess 27 and the location of the stop 29 that the rod has very limited movement between a rearward position when the end 25 is in engagement with the stop 29 and a forwardly position when the end 25 is spaced from the stop 29 but still engaged by the bracket 28.

The

trailing corner

30, 30a of the wings carry looped

extensions

31, 31a engageable by the rod end 25a when in its rearward position and disengaged by the rod end 25a when in its forward position as clearly seen in FIG. 5 of the drawing. It will b noted in this connection that the force vector imparted to the wings transversely of the rod 25 is relatively small due to the alignment of the extended

strand

23, 23a or 23b close to but outwardly of the

pivots

16, 16a. Thus, the engagement of the looped

extensions

31, 31a with the rod end 25a should have little restraining effect on longitudinal movement of the rod 25. If it should be found that there is an objectionable restraining effect, this can be eliminated by adjusting and/orrelocating the

wing mounts

22, 22a or the nose mount 24 so that in the folded wing position the

strand

23, 23a or 23b comes closer to the pivots 16,

Although not so clearly apparent from the shortened illustration in FIG. 2, it will be seen in FIG. 1 that the location of the weight 26 is sufficiently forward in the assemblage to assure that the glider will nose down as it has completed the launch portion of its flight. Furthermore, by being aligned with the extended wings, the properly located weight 25 provides a concentration of weight which can enhance the flight characteristics of the glider.

In mass production of toy gliders in accordance with the invention, it may be possible to hold sufficiently close tolerances with respect to structures limiting movement of the rod 25 and the size and location of the weight 26 to insure good flight characteristics. It will be realized, however, that any deviation from such tolerance could impair the flight characteristics and it is, therefore, considered preferable to provide means for the user to make adjustments in the location of the weight 26 longitudinally of the rod 25. This can be accomplished in various ways and one means has been illustrated in FIG. 6 as comprising a two-part weight 26 in which an elongated, externally threaded part 26a is fixedly secured to the rod 25 and preferably provided withan enlarged head 26b at one end thereof. An internally threaded andweighted collar 26c is then mounted on the externally threaded part 260 so that rotation of the part 26c moves the weighted collar 26c longitudinally with respect to the rod 25.

In this modification both the inner part 26a and the collar 260 can constitute weighted material so that together they provide the weight concentration desired on the rod 25. Alternatively, however, the inner part 26a could be formed of lightweight plastic material so that the weighted collar 26c constitutes the primary weight carried by the rod 25.

It will be recognized that one using a glider equipped with a weight 25 having adjustable features as above described can note the flight characteristics of the glider and adjust the location of the collar 26c appropriately to improve the flight characteristics. Thus, for example, if the glide is too steep the collar 260 should be rotated to move it toward the tail of the glider; and if the glider tends to stall in flight, the collar 260 should be rotated to move it slightly toward the nose of the glider. By thus carefully adjusting the location of the collar 26c, it will be possible for the user to extend the range of flight and even achieve a certain amount of soaring in flight if prevailing temperature and wind conditions are appropriate.

While in the particular glider shown in the drawing the wings are located below the fuselage and the elongated weighted rod for restraining and releasing the wings is disposed below the wings in axial alignment with the fuselage, it will be understood that in adapting the principles of the invention to more elaborate glider models, and particularly models intended to provide a more realistic fuselage profile, changes can be made in the orientation of the above-mentioned parts. Thus, for example, in simulating a high winged monoplane the wings could be mounted above the fuselage; or in simulating a low winged monoplane the wings could be dropped to a position lower than shown in FIG. 2. In the latter event the weighted rod could well be oriented above the plane of the wings or even above the fuselage. In the event that simulation of airplane profile included the use of an enlarged, hollow fuselage, the weighted rod could be arranged within such hollow fuselage. In such event there should, of course, be appropriate access through the fuselage in the vicinity of a weight 26 of the type shown in FIG. 6 to facilitate axial adjustment of the weighted collar 26 c.

Various changes and modifications in the improved glider and wing control mechanism as hereindescribed may occur to those skilled in the art, and to the extent that such changes and modifications are embraced by the appended claims, it is to be understood that they constitute part of the present invention.

1 claim:

1. A toy glider comprising an elongated fuselage having pivotally mounted wings movable from an extended, flight position to an overlapped, swept back launch position, resilient means normally urging said wings to the extended flight position, an elongated rod extending parallel to and supported longitudinally of said fuselage, said rod having a concentrated weight thereon in substantial alignment with the extended wings, stop means at forward and rear portions of said fuselage for providing limited longitudinal movement of said rod and weight, and loop means at the outer trailing edges of said wings slidably engageable by said rod in the rearmost position thereof for supporting said wings in the swept back, launch position against the action of said resilient means.

2. A toy glider as defined in claim I wherein the concentrated weight on said rod includes means for moving the weight center thereof longitudinally of said rod.

3. A toy glider as defined in claim 2 wherein said last named means comprises an externally threaded member coaxially mounted on said rod and an internally threaded, weighted member in coaxial engagement with said first member to provide longitudinal movement thereof when rotated with respect to said first member.

4. A toy glider as defined in claim I wherein the foldable wings are pivotally mounted toward the forward end of said fuselage, and said forward end includes laterally extending means substantially perpendicular to the center line of said fuselage forming stop members aligning said wings in the extended, flight position thereof.

5. A toy glider as defined in claim 4 wherein the pivot mounting of said wings comprises parallel pivot axes and means for positioning the wings with respect to said axes so that the planes of said wings are sufficiently offset to permit free overlap of the wings when moved to theswept back, launch position.

6. A toy glider as defined in claim4 wherein said resilient means extend from points on the leading edges of said wings, outwardly spaced from the pivot mounting thereof, to a point forwardly of said pivot mounting and above the plane of said wings.

7. A toy glider as defined in claim 6 wherein said resilient means comprising a longitudinally yieldable strand member passing through a transverse aperture in the plane and having ends thereof secured to leading edges of said wings.

8. A toy glider as defined in claim 7 wherein the location of said aperture is such that in the swept back, launch position of said wings said resilient means, as extended, lies outwardly of the pivot mountings of said wings.

9. A toy glider comprising an elongated fuselage having a tail assemblage at one end and an enlarged and elongated nose portion at the other end thereof means at the juncture of said fuselage and nose portion for pivotally mounting wings beneath said fuselage for movement from extended, flight position to a swept back, launch position, means suspending an elongated rod beneath said fuselage and wings in alignment with said'fuselage, and in a manner to have limited longitudinal movement with respect to said fuselage, said rod carrying a concentrated weight at a point in substantial alignment with said wings, resilient means extending from points on the leading edges of said wings outwardly of the pivot mounting thereof to a point in said nose portion forwardly of said pivot mounting for normally urging said wings to extended, flight position, and means at the outer trailing edges of said wings engageable by said rod in the rearwardly oriented position thereof for supporting the wings in the swept back, launch position, said last named means being automatically disengaged to permit extension of the wings to flight position when said rod is moved by said weight to a forwardly oriented position.

l0. A toy glider-as defined in claim 9 wherein said resilient meansengages said nose section at a point somewhat above the plane of said wings.

11. A toy glider as defined in claim 9 wherein the concentrated weight on said rod includes means for moving the weight center thereof longitudinally of said rod.

12. A toy glider with pivotally mounted wings movable from an extended, flight position to a swept back, launch position, said glider comprising an elongated fuselage terminating at one end in a tail assemblage and at the other end in an enlarged and streamlined nose and wing mounting assemblage, the nose portion of said assemblage having a transverse dimension two or three times greater than said fuselage and including at the rear portion thereof an essentially flat surface extending downwardly from and perpendicularly to said fuselage, laterally extending vanes of generally triangular contour projecting from opposed sides of said nose portion having swept back leading edges and following edges in common alignment with said perpendicularly disposed surface of the nose portion providing wing stops for the extended wing position, other transversely protruding means at opposed sides of said nose portion above and extending rearwardly from said perpendicularly disposed surface thereof, pivotally supporting wings for swinging movement beneath said fuselage, axially aligned means in said nose section and in substantial alignment with said tail assemblage for supporting beneath said wings and parallel to said fuselage an axially moveable lightweight rod having a concentrated weight in substantial alignment with said wings, re straining means on the rear trailing edges of said wings engageable by said rod in the rearwardly oriented position thereof, and resilient means extending from a forward portion of said nose section to points on the leading edges of said wings outwardly spaced from the pivot mounting thereof for urging said wings to the extended, flight position when forward movement of said rod has disengaged said restraining means.

13. A toy glider as defined in claim 12 wherein said resilient means engages said forward portion of the nose section at a point somewhat above the plane of said wings.

14. A toy glider as defined in claim 12 wherein the concentrated weight on said rod includes means for moving the weight center thereof longitudinally of said

Claims

2. A toy glider as defined in claim 1 wherein the concentrated weight on said rod includes means for moving the weight center thereof longitudinally of said rod.

4. A toy glider as defined in claim 1 wherein the foldable wings are pivotally mounted toward the forward end of said fuselage, and said forward end includes laterally extending means substantially perpendicular to the center line of said fuselage forming stop members aligning said wings in the extended, flight position thereof.

5. A toy glider as defined in claim 4 wherein the pivot mounting of said wings comprises parallel pivot axes and means for positioning the wings with respect to said axes so that the planes of said wings are sufficiently offset to perMit free overlap of the wings when moved to the swept back, launch position.

6. A toy glider as defined in claim 4 wherein said resilient means extend from points on the leading edges of said wings, outwardly spaced from the pivot mounting thereof, to a point forwardly of said pivot mounting and above the plane of said wings.

9. A toy glider comprising an elongated fuselage having a tail assemblage at one end and an enlarged and elongated nose portion at the other end thereof means at the juncture of said fuselage and nose portion for pivotally mounting wings beneath said fuselage for movement from extended, flight position to a swept back, launch position, means suspending an elongated rod beneath said fuselage and wings in alignment with said fuselage, and in a manner to have limited longitudinal movement with respect to said fuselage, said rod carrying a concentrated weight at a point in substantial alignment with said wings, resilient means extending from points on the leading edges of said wings outwardly of the pivot mounting thereof to a point in said nose portion forwardly of said pivot mounting for normally urging said wings to extended, flight position, and means at the outer trailing edges of said wings engageable by said rod in the rearwardly oriented position thereof for supporting the wings in the swept back, launch position, said last named means being automatically disengaged to permit extension of the wings to flight position when said rod is moved by said weight to a forwardly oriented position.

10. A toy glider as defined in claim 9 wherein said resilient means engages said nose section at a point somewhat above the plane of said wings.

12. A toy glider with pivotally mounted wings movable from an extended, flight position to a swept back, launch position, said glider comprising an elongated fuselage terminating at one end in a tail assemblage and at the other end in an enlarged and streamlined nose and wing mounting assemblage, the nose portion of said assemblage having a transverse dimension two or three times greater than said fuselage and including at the rear portion thereof an essentially flat surface extending downwardly from and perpendicularly to said fuselage, laterally extending vanes of generally triangular contour projecting from opposed sides of said nose portion having swept back leading edges and following edges in common alignment with said perpendicularly disposed surface of the nose portion providing wing stops for the extended wing position, other transversely protruding means at opposed sides of said nose portion above and extending rearwardly from said perpendicularly disposed surface thereof, pivotally supporting wings for swinging movement beneath said fuselage, axially aligned means in said nose section and in substantial alignment with said tail assemblage for supporting beneath said wings and parallel to said fuselage an axially moveable lightweight rod having a concentrated weight in substantial alignment with said wings, restraining means on the rear trailing edges of said wings engageable by said rod in the rearwardly oriented position thereof, and resilient means extending from a forward portion of said nose section to points on the leading edges of said wings outwardly spaced from the pivot mounting thereof for urging said wings to the extended, flight position when forward movement of said rod has dIsengaged said restraining means.

14. A toy glider as defined in claim 12 wherein the concentrated weight on said rod includes means for moving the weight center thereof longitudinally of said rod.