Geometrical instruments
Patent
1979-09-28
1981-07-21
McQuade, John
Geometrical instruments
339 21R, 339 22R, 339 88R, H01R 900
Patent
active
042794560
ABSTRACT:
A bipolar shunting device for multipolar electric lines formed by a box-type contact unit which may be fitted slidingly in substantially U-shaped sections, which support internally two opposite sets of electric insulated wires. A box-type connection unit is provided outside of the sections. In the contact unit three moveable contacts are provided, which are operated by a lever control placed outside of the connection unit. The device includes a two-position selecting unit able to connect itself alternately to either of two of the movable contacts while the third contact is constantly connected to the lever control.
REFERENCES:
patent: 3686614 (1972-08-01), Hyrylainen
patent: 3757273 (1973-09-01), Hesse
patent: 3760133 (1973-09-01), Howard
patent: 3993385 (1976-11-01), Seger
F. Lli Zucchini
McQuade John
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