U.S. patent number 3,774,339 [Application Number 05/170,192] was granted by the patent office on 1973-11-27 for hollow building block.
This patent grant is currently assigned to Dart Industries, Inc.. Invention is credited to James Baldwin Swett.
United States Patent |
3,774,339 |
Swett |
November 27, 1973 |
HOLLOW BUILDING BLOCK
Abstract
A hollow building block incorporates separable prismic sections
which are hinged together preferably at an intersection of
laterally extending block walls and which are attachable not only
to one another, but also to other similar block sections. This
versatility of attachment employing a snap-type lug and recess
arrangement enables the user to create a multitude of other stable
block configurations.
Inventors: |
Swett; James Baldwin
(Barrington, RI) |
Assignee: |
Dart Industries, Inc. (Los
Angeles, CA)
|
Family
ID: |
22618928 |
Appl.
No.: |
05/170,192 |
Filed: |
August 9, 1971 |
Current U.S.
Class: |
446/121 |
Current CPC
Class: |
A63H
33/062 (20130101); A63H 33/04 (20130101) |
Current International
Class: |
A63H
33/04 (20060101); A63H 33/06 (20060101); A63h
033/08 () |
Field of
Search: |
;46/25,24,23,26,16
;220/4B,4E,31S |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Mancene; Louis G.
Assistant Examiner: Lever; J. Q.
Claims
What is claimed is:
1. In a prismic toy building block having two opposed base portions
and a plurality of interconnected and connecting lateral side
walls; said building block being sectioned along a plane defined by
two opposed lateral edges, each of said lateral edges being formed
by the intersection of a pair of said lateral walls, said
sectioning forming first and second prismic sections, that are
hinged together along one of said opposed lateral edges so that
said toy building block may be opened along said sectioning plane
by pivoting said prismic sections about said hinge, the improvement
comprising means integral with each of said sections for positively
yet releasably securing said first and second prismic sections one
with the other along the plane of sectioning, said means further
being interengagable between respective first and second prismic
sections of additional like blocks to create a combined block
shaped similarly to said prismic toy block.
2. The toy building block claimed in claim 1 wherein said securing
means comprises a plurality of lugs positioned both proximate said
hinge the lateral edge opposing said hinge on one said prismic
sections and further including matching recesses on the second of
said prismic sections.
3. The toy building block claimed in claim 1 wherein said securing
means comprises at least two lugs on said first prismic section and
a pair of recesses for accepting said lugs on said second prismic
section to which said first prismic section is hinged.
4. The block claimed in claim 1 wherein said block is hollow.
5. The block claimed in claim 4 wherein said block is manufactured
of a resilient shape-retaining plastic material.
6. The block claimed in claim 1 wherein said securing means
comprises a plurality of lugs positioned along lines defined by the
intersection of said plane with said base portions on one of said
prismic sections and a plurality of matching recesses positioned
along lines defined by the intersection of said plane with said
base portions on the other of said prismic sections so that said
lugs will snap into said recesses to securely and releasably hold
said prismic sections together along said planar areas.
7. A toy building block set incorporating at least two similarly
constructed prismic toy building blocks adapted for interconnection
one with the other each of said blocks having two opposed base
portions and a plurality of interconnected and connecting lateral
side walls; said building block being sectioned along a plane
defined by two opposed lateral edges, each of said lateral edges
being formed by the intersection of a pair of said lateral walls,
said sectioning forming first and second prismic sections, that are
hinged together along one of said opposed lateral edges so that
said toy building block may be opened along said sectioning plane
by pivoting said prismic sections about said hinge, the improvement
comprising means integral with each of said sections for positively
yet releasably securing said first and second prismic sections one
with the other along the plane of sectioning, said means further
being interengagable between respective first and second prismic
sections of additional like blocks to create a combined block
shaped similarly to said prismic toy block.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to toy building blocks and relates more
particularly to a toy building block which can be opened and
interconnected with other similar toy building blocks.
2. History of the Prior Art
It has been speculated that toy building blocks have been used by
children since before recorded history. Egyptian children likely
used small blocks of stone to build small structures in an attempt
to imitate the adults who were using larger blocks to construct
huge stone structures.
It is known that building blocks were used during the Victorian Era
for teaching religious history. The blocks were provided with
portions of a picture which cooperated with other blocks having
other portions of the picture so that the blocks could be assembled
to display an entire religious scene.
In the 19th century, hollow building blocks were used which had
recesses or cavities covered with a transparent material such as
glass and which contained ornaments, pictures, or other objects
which could be seen through the glass.
More recently, building blocks have been invented which are hollow,
can be opened and can be interconnected with other similar building
blocks. These blocks have a sidewall which is hinged and can be
opened to expose the interior of the block. The hinged sidewall can
be connected with a sidewall on similar blocks; however, the
connection between the hinged sidewall and a sidewall of the other
block results in a construction having a thickness at the
connection which is double the thickness of either of the
unconnected sidewalls. When the hinged sidewall was open, the
double thickness at the connection interfered with stacking of the
connected blocks. No prior art openable block permitted connection
of the open block to another openable block without interference to
stacking. In addition, no prior art openable block permitted an
open portion of the block to be connected after it was opened to an
open portion of another block to form a structure having a shape
which was substantially the same shape as the shape of one of the
original openable blocks.
Recently, a block was developed which opened along a plane between
at least two opposing lateral edges of a prism or edges of a
polyhedron, the parting or opening lines of which were hidden by
the edges where the plane intersected the edges of the prism or
other polyhedron, thus the resulting openable block was more
appealing to the eye. This prior art block, however, did not
provide for interconnection with other similar blocks to form
structures from interconnected blocks.
BRIEF DESCRIPTION OF THE INVENTION
The block herein disclosed similar to the previously discussed
prior art block opens along a plane between at least two opposing
lateral edges or sidewalls to form at least two polyhedral
preferably prismic sections. The block is however provided with a
connecting structure which permits interconnection with similar
open blocks along the planar area on each prismic section formed by
the plane. The connection along the planar area with another
prismic section from another block can form a structure having a
shape substantially the same as the original block and can form a
structure which can be stacked with other unconnected blocks or
with other connected blocks. In addition, the connection along the
planar area can form symmetrical shapes and the openings into the
block along the planar area, if it is hollow, can be closed by the
interconnection of blocks.
The unique block likewise provides a novel constructional toy for
interconnecting building blocks to form structures. The block,
which may permit the formation of either symmetrical or
asymmetrical shapes, which may be hollow, yet be closed by
interconnection with other blocks and which can be used as regular
unconnected building blocks, without external connecting structures
is interesting, educational and amusing and therefore meets the
requirements of an excellent toy.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top perspective view of the novel toy building
block.
FIG. 2 is a top perspective view of the opened toy building
block.
FIG. 3 is a front perspective view showing two of the toy building
blocks with a secondary prismic section of one of the blocks
assembled to a secondary prismic section of the other block.
FIG. 4 is a front plan view showing four of the blocks of the
invention assembled together to form a hexahedron.
FIG. 5 is a top perspective view of the block shown in FIG. 1
rotated 90.degree. to the right.
FIG. 6 is a top perspective view of the block shown in FIG. 5 with
one corner broken away.
FIG. 7 is a sectional view showing the block connection taken along
lines 7--7 of FIG. 3.
FIG. 8 is a front perspective view of the inventive toy building
block shown in a partially opened position.
FIG. 9 is a top plan view of the block shown in FIG. 2.
PREFERRED EMBODIMENT
In carrying into effect the substance of this invention concept,
any polyhedral toy building block may be used which is defined by
at least one base and a plurality of connecting sidewalls and is
sectioned along a plane passing through at least two opposing
sidewalls. Two secondary polyhedral sections will be formed by the
sectioning plane and these sections are hinged together along one
of the lines defined by the intersection of the sectioning plane
with the base or one of the sidewalls so that the toy building
block may be opened by pivoting the secondary sections relative to
one another about the noted hine. The block may likewise be
similarly sectioned by more than one plane and the resulting
sections may be attached to each other by more than one hinge.
In accordance with this invention, each of the secondary polyhedral
sections is provided with a connecting means that selectively
retains the secondary polyhedral sections in a closed position and
which is adapted to interconnect with similar mating sections of
like polyhedral toy building blocks when each have been opened.
While a toy building block having any polyhedral shape can be made
having the majority of advantages taught by this invention a
hexahedral shape is preferred due to the regular stacking and
connecting features which result. Further, when employing this
basic shape the secondary polyhedral sections spoken of may be
easily made in prismic form and such form contributes significantly
to the advantages of the block as is noted throughout the
specification. For example, when a prismic polyhedral shape is
used, the sectioning plane may pass through a line formed by the
intersection of a pair of the sidewalls of the hexahedron or in
other words, a lateral edge thus a parting line between the
polyhedral secondary prismic sections is hidden by the lateral
edge.
FIG. 1 shows a polyhedral prismic block of the preferred
embodiment. The particular block shown in FIG. 1 is a prismic
hexahedral block 10 which is cubical in shape, although the
particular polyhedral prism could be of any othe shape such as a
right triangular prism. The prismic block is defined by two major
bases 34 and 35 connected by lateral walls 17, 18, 19 and 20. The
intersection of the lateral walls define lateral edges 29, 30, 31
and 32. In the preferred embodiment, block 10 is sectioned along a
plane between two opposing lateral edges to form prismic sections
11 and 12. Prismic section 11 is defined by secondary bases 13 and
14, lateral walls 17 and 18 and lateral area 36. Prismic section 12
is defined by secondary bases 15 and 16, lateral walls 19 and 20
and lateral area 37. The intersection of lateral area 36 with
lateral walls 17 and 18 form lateral edges 29a and 31a respectively
and the intersection of lateral area 37 with lateral walls 19 and
20 form lateral edges 29b and 31b respectively. Lateral edges 31a
and 31b are connected by hinge 33 so that the secondary prismic
sections 11 and 12 may be separated by pivoting one of the
secondary sections about the hinge in relation to the other
secondary prismic section. Of course the lateral areas 36, 37 in
essence are representative of the sectioning plane spoken of.
In the preferred embodiment, each of the secondary prismic sections
is provided with means for securing the secondary sections together
along the sectioning plane when the sections are not separated, and
for securing each of the secondary sections to a separated
secondary prismic section of a similar toy building block. As best
seen in FIGS. 2 and 9, the securing means of the preferred
embodiment comprises a first pair of separated integral lugs 21 and
22 that form a part of flange 38 that protrudes from lateral area
37 on secondary base 15 of secondary section 12. Similarly, another
pair of separated lugs 23 and 24 extend from a flange 39 on
secondary base 16 and these lugs 21 - 24 engage matching recesses
25, 26, 27 and 28 on secondary section 11 when said sections are
closed one upon the other as is shown in FIGS. 1, 5 and 6.
Likewise, as is best seen in FIGS. 3 and 4, either the lugs or the
recesses may engage matching recesses or lugs respectively of a
secondary prismic section of a similar toy building block to form a
combined block shape similar to that of original block 10. Thus, by
variously interengaging the secondary prismic sections of the
blocks, new innovative block arrangements may be created. The
combined hexahedrons of FIG. 4 is an example but interlocking
chains and other structures are also easily produced.
FIG. 6 shows a block of the preferred embodiment having a corner
broken away which shows the engagement of lugs 21 and 24 with
recesses 25 and 28 respectively. FIG. 7 shows an enlarged view of
the engagement of a lug (for example 24) from a secondary prismic
section of a similar block with recess 25. The locking feature
having at least two lugs engaging at least two recesses to form a
major base 34 or 35 forms a secure attachment which will not easily
wobble after the lugs are snapped into the recesses.
It should also be apparent from the various Figures that the major
bases 34, 35 and corresponding secondary bases 13, 14, 15 and 16
included exteriorly exposed ribs 40 between which are located land
areas 41 (FIG. 8). The ribs 40 are ideally disposed on a bias with
respect to the surface configuration and are of varying heights
(each decreasing from that which is thickest--the center-most rib).
This will accommodate for any material shrinkage in the event the
blocks are molded from plastics materials and will thus assure the
creation of substantially flat surface areas which are critical for
good stacking characteristics. Similarly, rib width is
substantially more than land width so that ne ting is prevented.
This also is dictated to produce satisfactory stacking
features.
Another significant feature of the invention is the unobtrusive
hinge 33. Such is no more than a fine line of material connecting
lateral edges 31a and 31b and in effect is lateral edge 31.
Unexpectedly no excess of material is needed to produce the hinge
and therefore each lateral edge is similar to each other such edge.
This, of course, is also significant not only to the esthetics of
the blocks, but also to the functional interrelationships
therebetween.
The block may be manufactured of any suitable material and is
preferably manufactured from a resilient, shape-retaining, plastic
material to assist in forming a securing means for holding one
secondary prismic section to another which securing means can be
easily engaged and disengaged.
* * * * *