US927499A - Educational device. - Google Patents

Description

J. DAVIS.

EDUCATIONAL DEVICE.

APPLICATION FILED SEPT. 10, 1908.

27 49, Patented July 13, 1909.

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device, primarily adapted for use in the JESSIE DAVIS, OF CHICAGO, ILLINOIS.

EDUCATIONAL DEVICE Specification of Letters Patent.

Patented July 13, 190's.

Application filed September 10, 1908 Serial No. 452,356.

To all whom it'ma'y concern:

Be it known that I, J ESSIE DAVIS, a citizen I of the UnitedStates, residing at Chicago,

" ing.

in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Educational Devices, of which the following is a specification, reference being had therein to the accompanying draw- This invention relates to an educational kindergarten and primary schools and having as its object the stimulation and development of the creative activity of children.

With this object in view, the invention has reference to the occupation work of the pupil, or the art of construction, whereby the child can, in its own way, appreciate the constructive work of mankind.

Further, the invention deals with the different, modes of arranging and grou ing plane surfaces relative to each other an includes a plurality of planes having an interlocking connection one with the other.

More particularly, the invention consists in the formation of a plurality of planes detachably intersected with and by each other by slit-ting each plane from its outer edge or periphery as the case may be to a point adjacent the center, and sliding the planes together with the slitted portion of each plane straddling or overlapping the solid portion of the intersecting plane projecting beyond the slit.

Other details in construction and arrangement will be pointed out in the description following, reference being especially directed in connection therewith to the accompanying drawings, which form a part hereof.

In the drawings, is shown, for the purpose of illustration, a convenient embodiment of the invention, and Figure 1 is'a plan view of each of the parts oing to make up three intersecting planes, t e several parts being detached for'the purpose of clearness, Fig. 2 is a perspective view showing two of the parts assembled to form two intersecting planes, Fig. 3 is a similar view showing three of the parts assembled, Fig. 4 is a similar view disclosing all of the parts assembled to constitute three intersecting planes,

and Fig. 5 is a view disclosing the three intersecting planes in folded or collapsed condition.

The same letters designatecorresppnding parts in the several views of the drawings, A

being one plane and constituting the body or foundation tobe built up from. This plane I shall designate the first plane, the same be- 1ng conven1 ently of circular formation, and having a sl1t A extending from the periphery thereof to its center, oppositely disposed slits A being formed at rlght angles to the first mentioned slit and extending from the 'perlphery to a point midway of a line drawn from the periphery to the center of the plane. B 18 a second plane, likewise conveni ently formed circular inoutline, and having a slit B extending from its periphery to its center. The planes A and B are thus assembled by sliding one over the other at right angles, the slit B of the plane B straddling the solid portion of the plane A that 0 pro ects beyond the' slit A thereof. Two intersecting planes are thereby formed. C,'l designates similarly formed members, semi-circu provided with slits c, d, respectively, extending from the center of the straight edge to a point midway of a line drawn at right angles from the straight edge to the periphery ofthe curved portion. As thus 'constructed, the parts C and D are arran ed to slide over the first plane A, the slitted portions 0 and d engaging the solid portions of said'plane A extending beyond the slits c and d. When seated, these member 0 and D engage opposite surfaces of the second plane ar in configuration, and each are B, and constitute in effect continuations one of the other whereby is formed the third intersecting plane.

Each of the parts going to make up the plane is preferably flexible in construction, conveniently a heavy paper, sufficiently flexible to fold easily, yet stiff enough to retain its shape. As thus constructed, the parts are collapsible after the manner shown in Fig. 5, presenting the .appearance of a series of superimposed layers. In this way, the device may be packed and shipped from school to school, or the child can fold and take home, there to open or reconstruct it and show the result of his days occupation.

It will be appreciated that the child, through play with the intersecting planes, not only learns how to intersect, but the forms suggest to him some of the things he can afterward make, as troughs, cradles, chairs etc., and all this without direct teaching, whereby the learning is developed and knowledge retained much longer and to bettr-r advantage than were it forced upon him by instruction. By simply playing with the device, the child soon learns to measure, he will gain skill of hand through cutting, his inventive power in fastening planes together is drwcloped, and he learns how things about him are made. In other words, he gains an uuderstaluling of the work of man.

I claim:

1. An educational device of the character described, comprising a nlurality of circular planes intersected by and with each other,

the planes having cooperating slitted portions, the slitted portion t each plane --lradd'ling the solid portion of the intersecting plane that projects beyond the slit.

2. ..\n educational device of the character described comprising a plurality of planesof like configuration adapted to be intersected by and with eat-h other, each plane having a slit-ted portion extending from the outer edge to the center, the slitted portion of each plane straddling the solid portion of the intersecting plane that projects beyond the slit, one of said planes having auxiliary oppositely disposed slitted portions, and two parts formed after the fashion of one-half of one of the aforementioned planes, said parts having slitted portions cooperating with said auxiliary oppositely disposed slitted portions on said. first mentioned planes, whereby when assembled the said parts will constitute a third plane intersecting by and with the first mentioned planes.

3. An educational device of the character described comprising a plurality of parts each having a slitted portion whereby they may be detachably interlocked to form three similar planes intersected by and with, each other.

4. An educational device of the character described comprising a plurality of planes of like configuration which are intersected by and with each other through the medium of cooperating longitudinal slits in each, said planes being constructed and arranged to collapse and offer no protuberance beyond the outer edge of one another when collapsed while maintaining the interlocking condition.

5. An educational device of the character described comprising a plurality of planes adapted to be intersected by and with each other, each plane having a slitted portion extending from the outer edge to a point adjacent the center, the slitted portion of each plane straddling the solid portion of the intersecting plane that projects beyond the slit, and one of said planes having an auxiliary slitted portion extending at an angle to the first mentioned slit therein and ter ininating short of the center, and a part having a slit cooperating with said auxiliary slit whereby the latter slitted portion straddles the solid portion of the intersecting plane that projects beyond the slit.

(3. An educational device of the character described comprising a circular plane having a slit extending from the outer edge to the center, an auxiliary circular plane having, a slit extending from the outer edge to the center, the slitted portion of each plane straddling the solid portion of the inter sect-ing plane that projects beyond the slit, the auxiliary plane also having oppositely disposedslit-ted portions extending from the outer edge of the plane to a point short of the center and at right angles to the first mentioned slit, and two semicircular parts each having slitted portions corresponding with the said oppositely disposed slitted portions of the auxiliary plane, whereby when assembled the said parts will constitute a third circular plane intersecting by and with the first mentioned planes.

7 In testimony whereof I afiix my signature in presence of two witnesses.

. JESSIE DAVIS.

Witnesses E. D. NEAL, J. N. Cnonsn.

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