U.S. patent number 3,814,418 [Application Number 05/355,197] was granted by the patent office on 1974-06-04 for helical slide.
This patent grant is currently assigned to American Playground Device Co.. Invention is credited to Steven A. Henning.
United States Patent |
3,814,418 |
Henning |
June 4, 1974 |
HELICAL SLIDE
Abstract
A slide and method of making it in which there is an upright
ground-engageable post having a helical channeled bedway extending
axially therealong with a ladder interconnected to the upper end of
said bedway. The bedway is formed from an annular body having inner
and outer radially spaced circumferential edges. After the body is
formed, it is cut thereacross, a post is inserted through said
body, and the inner circumferential inner edge of said body
adjacent one of its ends is connected to said post. The opposite
end of said body is pulled axially along the post to cause said
body to project radially outwardly therefrom with its inner
circumferential edge abutting said post along a helical path. Said
inner circumferential edge is fastened to the post, and the ladder
is then interconnected to the upper end of the extended bedway.
Inventors: |
Henning; Steven A. (Anderson,
IN) |
Assignee: |
American Playground Device Co.
(Anderson, IN)
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Family
ID: |
26918425 |
Appl.
No.: |
05/355,197 |
Filed: |
April 27, 1973 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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224108 |
Feb 7, 1972 |
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Current U.S.
Class: |
472/116;
193/12 |
Current CPC
Class: |
B21D
53/00 (20130101); A63G 21/00 (20130101) |
Current International
Class: |
A63G
21/00 (20060101); B21D 53/00 (20060101); A63g
021/00 () |
Field of
Search: |
;272/56.5R,56.5SS,60
;193/2,12,13 ;29/156.8R,157.3AH,469 ;182/48 ;D34/5E
;104/56,57,69,70 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
General Playground Equipment, Inc., Kokomo, Indiana, Catalog No.
22, Page 2, Fun-Ful Spiral Slide, 1948. .
Haslett Spiral Chutes Brochure 1953, Haslett Chute and Conveyor
Company, Oaks, Pennsylvania.
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Primary Examiner: Oechsle; Anton O.
Assistant Examiner: Kramer; Arnold W.
Attorney, Agent or Firm: Trask, Jenkins & Hanley
Parent Case Text
This application is a divisional application of my copending
application Ser. No. 224,108, filed Feb. 7, 1972.
Claims
I claim:
1. A slide, comprising a vertically extending ground-engageable
post, a unitary helical channeled bedway extending axially along
said post and projecting radially therefrom, said bedway being
connected to said post along its inner edge with the connections
between said post and the inner edge of said bedway constituting
the sole means of supporting said bedway on said post, a platform
assembly connected to said bedway at the upper end thereof, a
ground-engageable ladder assembly connected to said platform
assembly, a discharge chute connected to the lower end of said
bedway, said platform assembly being connected to the adjacent
upper end of said bedway and comprising a pair of spaced parallel
side walls interconnected by a floor and upstanding therefrom with
the rear of said side walls connected to said ladder assembly and
the front of said side walls connected respectively to said post
and tangentially to the outer wall portion of said channeled
bedway, and a generally frustoconical transition section connected
to said post and interconnecting said floor and bedway.
2. A slide, comprising a vertically extending ground-engageable
post, a unitary helical channeled bedway extending axially along
said post and projecting radially therefrom, said bedway being
connected to said post along its inner edge with the connection
between said post and the inner edge of the bedway constituting the
sole means of supporting said bedway on said post, a platform
assembly connected to the adjacent upper end of said bedway and
comprising a pair of spaced, parallel side walls interconnected by
a floor and upstanding therefrom with the front of said side walls
connected respectively to said post and tangentially to the outer
wall portion of said channeled bedway, a generally frustoconical
transition section connected to said post and interconnecting said
floor and bedway, a ladder assembly having a pair of uprights
connected to said floor and having a plurality of vertically spaced
steps mounted thereon, and a pair of wings connected to said
uprights, floor and the rear of said side walls.
Description
BACKGROUND OF THE INVENTION
Helical slides and chutes in which the slide bedway or channel is
in the form of a helix mounted on a vertical support running along
the axis of the helix are known in the art. Such slides are shown
in my prior U. S. Pat. Des. No. 221,963 and in U. S. Pat. Nos.
1,256,724; 2,437,259; 1,270,366 and 3,083,015.
In the manufacture of such slides, it has heretofore been the
conventional practice to form the channel shaped bedway of the
slide from a plurality of small pie-shaped sections which are
connected to each other and to the center supporting post. Because
of the small radial extent of the inner ends of these various
sections, it has been necessary to brace such sections and the
bedway formed thereby with braces extending from the sections
inwardly to the supporting post or by ground-engageable braces
projecting outwardly and downwardly from the bedway.
The instant invention overcomes the difficulties and disadvantages
of such prior construction methods by providing a method of making
a spiral slide in which the channeled bedway is formed from a
limited number of parts which can be easily connected to each other
and to the central supporting post thereby effecting economies in
the manufacture of the slide and reducing the number of
interconnections that must extend across the bedway.
SUMMARY OF THE INVENTION
In accordance with the preferred form of the invention, there is
first formed an annular body having a generally U-shaped
cross-section between its inner and outer circumferential edges. A
radial cut is made across the body between a pair of points on its
inner and outer circumferential edges to thus form a pair of ends
on said body. An elongated ground-engageable post is inserted
through the body, and the inner circumferential edge of said body
adjacent one end thereof is fixedly connected to said post. After
the connection is formed, the opposite end of the body is pulled
axially along said post to thus cause said body to project radially
outwardly from the post with its inner circumferential edge
abutting said post along a helical path. The inner circumferential
edge is rigidly fastened to the post with the body forming a spiral
bedway extending downwardly along the post.
A platform assembly is connected to said body at the upper end
thereof, and a ground-engageable ladder is connected to said
platform assembly. The lower end of the helical bedway terminates
above the lower end of the ground-engageable post, and desirably, a
U-shaped discharge chute is mounted on the lower end of said bedway
to project generally tangentially outwardly from said post.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings illustrate the invention. In such
drawings:
FIG. 1 is a side elevation of a slide according to the instant
invention, with portions thereof being broken away;
FIG. 2 is a top plan view of the slide shown in FIG. 1;
FIGS. 3-6 show the successive steps for forming and mounting the
channeled bedway on the slide shown in FIG. 1; and
FIG. 7 is a side elevation of a slide similar to the one shown in
FIG. 1, but showing a modified form thereof.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
As shown in FIG. 1, my novel slide construction comprises a spiral
bedway 10 projecting radially outwardly from and extending axially
along a ground-engageable center support post 12. A discharge chute
14 is mounted on the lower end of the bedway 10, and a platform
assembly 16 is mounted on the upper end of said bedway. A
ground-engageable ladder assembly 18 is mounted on the outer end of
the platform assembly 16 and angles downwardly therefrom.
As shown in FIGS. 3-5, the bedway 10 is formed by forming a
circular disc 20 into an annular body 22 having inner and outer
circumferential edges 23 and 24. The body has a generally U-shaped
cross-section between the edges 23 and 24 to give it a channeled
cross-section. This cross-sectional configuration is provided by an
inner wall portion 25 whose inner edge constitutes the inner
circumferential edge 23 and an outer wall portion 26 whose outer
edge constitutes the circumferential edge 24. The inner and outer
wall portions 25 and 26 are interconnected by a floor portion 27
which forms the bottom or floor of the bedway 10. As shown, the
outer wall portion 26 has an axial extent substantially greater
than the axial extent of the inner wall portion 25. Desirably, in
forming the body 22, the outer circumferential edge 24 is rolled to
form a bead 28 extending therealong.
After the body 22 has been formed into the configuration
illustrated in FIG. 4, a radial cut 30 is formed in said body as
illustrated in FIG. 5. As shown, the cut 30 extends from a point on
the inner circumferential edge 23 radially outwardly to an adjacent
point on the outer circumferential edge 24. In this manner, the
body is provided with a pair of ends 32 and 33. As shown in FIG. 6,
after the cut 30 has been formed, the elongated post 12 having a
ground-engageable foot 37, is inserted through the center of the
body 22. Said post has an outer circumference substantially less
than the length of the circumferential edge 23. With the post
inserted through the body 22, the inner circumferential edge 23 of
the body, adjacent its end 33, is rigidly fastened to said post, as
at 38. As shown in FIG. 6, the connection 38 is disposed adjacent
to but downwardly from the upper end of said post.
It is also possible to insert the post 12 through the body 22 prior
to forming the cut 30 therein. However, in most applications it is
easier to manipulate and handle the body to form said cut prior to
inserting the post through said body.
After the connection 38 has been made, the free end 32 of the body
24 is pulled downwardly along post 12 as indicated by the arrow A.
This downward pulling effort causes the body to rotate around the
axis of the post 12 with its inner circumferential edge 23 abutting
said post along a helical path. Desirably, the body 22 is extended
axially along post 12 a distance sufficient that said body forms
one revolution around said post. With the body maintained in its
extended helical configuration, its inner edge 23 is rigidly
fastened to the post. With the body rigidly connected to the post,
the bedway 10 formed thereby is maintained in a radially extending
position on said post with the wall portion 26 of the body 22 being
axially oriented and the circumferential edge 24 being disposed
above the corresponding portions of the circumferential edge 23. As
shown, the connection between the bedway and the post constitute
the sole means of connecting the bedway to the post.
After the bedway 10 has thus been formed and rigidly connected to
the post 12, the discharge chute 14 is rigidly connected to the
lower end 32 of said bedway to project tangentially outwardly from
the post. As shown, said chute has a generally U-shaped
configuration, and is thus provided with inner and outer wall
portions 42 and 43 connected to wall portions 25 and 26 and a floor
portion 44 connected to the floor portion 27.
The platform assembly 16 is then mounted on the upper end 33 of the
bedway. As shown in FIGS. 1 and 2, said platform assembly comprises
a platform 46 having a U-shaped cross-section formed from a pair of
side walls 48 and 49 interconnected by a floor 50. The inner end of
the wall 49 is connected to the outer wall portion 26, while the
inner end of the platform wall 48 is connected to the post 12. A
generally frustoconical transition section 55 is connected to the
inner edge of the platform floor 50 and to the inner wall portion
25, floor portion 27 and a portion of the outer wall portion 26 of
the bedway 10. As shown in FIG. 2, the transition section 55 is
also connected to the adjacent portion of the post 12, as at 57.
Conveniently, an arcuate guard rail 59 is connected to the inner
edge of the platform wall 49 and to the circumferential edge 24 of
the bedway 10.
As shown in FIGS. 1 and 2, the ladder assembly 18 angles downwardly
and outwardly from the outer end of the platform assembly 16.
Conveniently, said ladder assembly comprises a pair of side walls
60 and 61 interconnected by a back wall 62. A plurality of
vertically spaced steps 63 are mounted on the back wall 62 between
the side walls 60 and 61.
As shown in FIG. 1, the outer end of the platform floor 50 projects
outwardly beyond the ends of the side walls 48 and 49 and is
connected to the ladder back wall 62. A pair of wings 66 are
connected to the outer ends of the platform walls 48 and 49 and to
the outwardly projecting portion of the floor 50. The wings are
connected to the upper ends of the ladder side walls 61 and 60 and
form extensions thereof. In this manner, the wings 66 and the
extension of the platform floor 50 serve to interconnect the ladder
and platform assemblies.
In the embodiment illustrated in FIG. 1, the bedway is formed from
a singular annular body 22. In many applications, however, it may
be desirable to have a bedway 10 having a greater helical extent
than that illustrated in FIG. 1. Thus, it may be desirable to form
a bedway 10' from a plurality of interconnected annular bodies 22',
as is shown in FIG. 7.
In the formation of the bedway 10' in FIG. 7, a pair of identical
annular bodies 22' are formed in the same manner as is illustrated
in FIGS. 4 and 5. After each of said bodies has been provided with
its radially extending cut, a pair of ends on the two bodies are
rigidly joined together as shown at 70 in FIG. 7. In this manner,
the two interconnected bodies form a unitary extended helix. After
the bodies are interconnected, the ground-engageable post 12' is
inserted through them. The bedway 10' is then formed in the same
manner as previously described in connection with the embodiment
shown in FIG. 1, and the discharge chute 14' and the platform and
ladder assemblies 16' and 18' are also mounted on the bedway 10' in
the same manner previously described. In this embodiment, as with
the embodiment shown in FIG. 1, it is preferable if each of the
bodies 22' makes one revolution around the post 12'.
While the invention has been described in the context of a
playground slide, it is to be understood, of course, that the same
principles and techniques can be employed for using the invention
in the fabrication of a spiral type conveyor. In such application,
it is, of course, not necessary to employ the ladder assemblies 18
or 18' or the platform assemblies 16 and 16', and accordingly, such
assemblies may be eliminated without departing from the spirit and
scope of the invention as set forth in the appended claims.
* * * * *