US967591A - Educational appliance. - Google Patents

Description

Patented Aug. 16, 1910.

Tus Narmrs PETER: ce., wAsHmcm/v, 1:!A c.

"UNITED sTATEs PATENT onnicn.

JOHN Gr. WARFIELD, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OE ONE-FOURTH 4'130 C. It. HARRIS, OE LOS ANGELES, CALIFORNIA.

EDUCATIONAL APPLIANCE.

967,591, Specification of Letters Patent. Patented Aug- 16s 1910, Application led July 14, 1909. Serial No. 507,589.

To all whom 'it may concern: to the cylindrical body 7 in any approved Be it known that I, J oHN Gr. WARFIELD, manner, but I have shown them held by the a citizen of the United States, residing at buttons 9. The buttons can either be re- Los Angeles, in the county of Los Angeles moved from the cylinder for connecting the 5 and State of California, have invented cersheets thereto, or the sheets can be slipped 55 tain new and useful Improvements in Eduover the buttons by providing the sheets with cational Appliances, of which the following slits or openings 11. is a specification. The cylinder or member 7 is rotated upon My invention relates to an improvement in the base A, bringing the desired column of i0 educational appliances, the object being to figures into view through the slot 1 of the 60 provide means whereby a cylinder having upright B. The slide 3 can be moved to columns of figures thereon can be rotated, any position for varying the length of the whereby the columns of figures will be pre column, and exposing any desired number v sented to view, through an opening in an of figures, for instance four or live figures upright to permit of the columns of gures can be exposed, at a time, for the purpose 65 being added. of adding, or a greater or less number can A further object is to provide means be exposed by shifting the slide. A device whereby a long or short column of figures of this character is intended to be used more may be exposed at the will of the operator. particularly in schools for the purpose of The invention consists in certain other teaching addition, and by providing columns 70 novel features of construction and co1nbnaof figures differently arranged upon the tions of parts which will be hereinafter desheet, the pupil will thereby become fascribed and pointed out in the claim. miliar with the different numerals, and the In the accompanying drawings :-Figure 1 result of these different numerals when is a perspective view, Fig. 2 is a vertical secadded together. As the sheets 10 are capa- 75 tional view, Fig. 3 is a cross section, and ble of being removed, new sheets can be sup- Fig. 4 is a detail sectional view, showing the plied and applied to the cylinder. manner of applying or connecting the sheets It is evident that more or less slight on the cylindrical body. changes might be resorted to in the form A, represents the base, andB is an upright and arrangement of the several parts deso connected thereto, which is provided with a scribed without departing from the spirit vertical slot 1. Flanges or guides 2, 2, are and scope of my invention, and hence I do connected to the inner side of the upright not wish to be limited to the exact construc- B, and a slide 3 passing through the top of tion herein set forth, but

the upright is received between the anges Having fully described my invention, 85 and upright, the flanges forming guides for what I claim as new and desire to secure the slide in its movement. A concave openby Letters Patent, is z ing 4: is formed in the base A, in which is `An educational device comprising a base,

received a convex bearing 5 on the bottom 6, an upright connected thereto having a vertiof the cylindrical body-or member 7. The cal slot formed therein, a member having 90 bottom 6 is preferably made of wood, and columns of characters thereon rotatably the cylindrical body 7 of heavy card-board. mounted on the base, and a slide on the Hoops 8 are received within the cylindrical upright for varying the amount of exposure body 7 at certain intervals for forming of the column of characters through the slot.

proper support for the body. Buttons or In testimony whereofI affix my signature, 95

knobs 9 are formed along the upper and in the presence of two witnesses.

lower edges of the cylindrical body 7 where- JOHN Gr. WARFIELD. by the cylinder can be rotated upon the base Witnesses: A. Removable sheets of cardboard l0 hav- W. M. I-IoLBnoox,

ing columns of figures thereon are connected y J. G. I'IrLMEn.

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