USD171835S - Educational demonstration device - Google Patents

Description

March 30, 1954 G. A. AYRAULT ET AL Des. 171,835

EDUCATIONAL DEMONSTRATION DEVICE Filed Nov. 14 1951 6 Sheets-Sheet 1 GEORGE Av AYRAUL? ALL/SON J. MCNAY March 30, 1954 G. A. AYRAULT ET'AL 171,835

EDUCATIONAL DEMONSTRATION DEVICE Filed Nov. 14, 1951 6 Sheets-Sheet 2 awe/Mom GEORGE A AVRAULT ALL/SON J. MCNAV March 30, 1954 G. A. AYRAULT ET AL Des. 171,835

EDUCATIONAL DEMONSTRATION DEVICE Filed Nov. 14 1951 6 Sheets-Sheet U FIG 3 GEORGE A. AVRAULT ALL/SON J MCNAY ,Wfl $5 k WI March 30, 1954 G. A. AYRAULT ET AL 171,335

EDUCATIONAL DEMONSTRATION DEVICE Filed Nov. 14, 1951 6 Sheets-Sheet 4 grwmvtow GEORGE A. AYRAULT ALL/SON .Jv MCNAV March 30, 1954 G. A. AYRAULT ET AL 171,835

EDUCATIONAL DEMONSTRATIQN DEVICE Filed Nov. 14, 1951 6 Sheets-Sheet 5 GEORGE A. AYRAULT ALL/SON J. McNAY March 30, 1954 G. A. AYRAULT ET AL 1368- 171,835

EDUCATIONAL DEMONSTRATION DEVICE Filed Nov. 14, 1951 s Sheets-Sheet 6 GEORGE A. AVRAULT ALL/SON J. McNAY Patented Mar. 30, 1954 Des. 171,835

UNITED STATES PATENT OFFICE EDUCATIONAL DEMONSTRATION DEVICE George A. Ayrault, Oakland, and Allison J.

McNay, San Carlos, Calif., assignors to California Research Corporation, San Francisco, Calif., a corporation of Delaware To all whom it may concern:

Be it known that we, George A. Ayrault and Allison J. McNay, citizens of the United States of America, residing, respectively, in the city of Oakland, county of Alameda, and in the city of San Carlos, county of San Mateo, both in the State of California, have invented a new, original, and ornamental Design for an Educational Demonstration Device, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

Figure 1 is a perspective view of an educational demonstration device showing our new design.

Figure 2 is an elevational view from the left side of the device, as seen in Fig. 1.

Figure 3 is an elevational view from the front of the device. as seen in Fig. 1.

Figure 4 is an elevation view from the right side of the device, as seen in Fig. 1.

Figure 5 is an elevation view from the back of the device, as seen in Fig. 1.

Figure 6 is a top plan view of the device shown in Fig. 1.

We claim: The ornamental design for an educational demonstration device, as shown.

GEORGE A. AYRAULT. ALLISON J. McNAY.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date D. 8,292 Stidham Apr. 2'7, 1875 1,885,807 Doherty Nov. 1. 1932

Images