Weighing scales – Weigher responsive material control – With external intercontrol
Patent
1978-08-11
1980-08-26
Shepperd, John W.
Weighing scales
Weigher responsive material control
With external intercontrol
177 47, 177157, 177198, 273 1R, G09B 1902, G09B 2302
Patent
active
042188350
ABSTRACT:
A toy balancing scale used to teach children the proper relationship between the number of objects and/or the value of numbers, has a base having an upstanding support and pivoted on the support is a horizontal balance bar. At each end of the balance bar is a small peg on which objects can be attached.
On the backside of the balance bar is a housing having essentially a "spade-like" shape. The distance within the housing from the top of the spade to the bottom of the stem of the spade is longer than the distance from the top of the spade to the side projections. Mounted on the support is a sliding member having a peg which projects normal to the surface of the sliding member. The member slides vertically in the support and the peg fits in the spade-like housing. When the peg is at the top of the housing the balance bar is held in a locked position about the peg. A clanger and bell mechanism is activated by the sliding member when the member is free to travel this greater distance. If, however, i.e., the balance arm is unbalanced, the member will only be free to travel a limited amount and the clanger and bell mechanism will not be activated. This allows a child to determine whether or not the number of objects or the numbers on one side of the balance bar are equal to the number on the other side of the balance bar.
REFERENCES:
patent: 680888 (1901-08-01), Roth
patent: 2260691 (1941-10-01), Popov
patent: 2402892 (1946-06-01), Hubble
patent: 3424455 (1969-01-01), Dunson
patent: 3742619 (1973-07-01), Jenks
patent: 3744792 (1973-07-01), McClary et al.
patent: 3774908 (1973-11-01), Greenberg
patent: 3809396 (1974-05-01), Leicht et al.
patent: 3934357 (1976-01-01), Couvillion
General Merchandise Co. Catalogue Fall 1960, Summer 1961, p. 619.
Boswell K. H.
O'Brian Edward D.
Shepperd John W.
Tomy Kogyo Co. Inc.
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