APPLICATION OF LINDELL, Patent Appeal No. 6074.

• Decision Date: 08 February 1955
• Docket Number: Patent Appeal No. 6074.
• Citation: 219 F.2d 452
• Parties: Application of Sigurd I. LINDELL.
• Court: U.S. Court of Customs and Patent Appeals (CCPA)

219 F.2d 452 (1955)

Application of Sigurd I. LINDELL.

Patent Appeal No. 6074.

United States Court of Customs and Patent Appeals.

February 8, 1955.

Robert R. Lockwood, Chicago, Ill. (Harris C. Lockwood and George R. Jones, Washington, D. C., of counsel), for appellant.

E. L. Reynolds, Washington, D. C. (H. S. Miller, Washington, D. C., of counsel), for Commissioner of Patents.

Before O'CONNELL, Acting Chief Judge, and JOHNSON, WORLEY and COLE, Judges.

O'CONNELL, Acting Chief Judge.

This is an appeal from the decision of the Board of Appeals of the United States Patent Office affirming the decision of the Primary Examiner finally rejecting, as unpatentable over the disclosure of the prior art, claims 40-45 in appellant's application for a patent on an invention which relates, generally, to switch construction for opening high voltage alternating circuits and, particularly, to switches that are capable of interrupting load, magnetizing, or charging currents. Fifteen claims, 7-19 and 35-36 were allowed.

Of the rejected claims No. 40 was regarded by the board as representative of the involved subject matter:

"40. In a switch for opening and closing high voltage alternating current circuits under load, in combination, a pair of stationary switch contacts in insulated spaced relation to which line conductors can be connected, a load interrupter connected to each contact including separable load interrupting contacts and are extinguishing means therefor arranged and adapted to effect load current interruption without external arcing likely to fault the circuit and without limitation as to their plane of location whereby the switch can be used for vertical, horizontal and underhung mounting, a switch blade rotatably mounted between its ends for completing the circuit between said line conductors by sidewise engagement from opposite directions at its ends with said switch contacts and for opening said circuit by sidewise disengagement in opposite directions therefrom, a disconnecting contact at each end of said switch blade for engaging the load interrupter thereat to maintain said circuit therethrough after separation of said switch blade from said switch contacts during its initial rotation away therefrom, and interengaging interlocking means on each load interrupter and the corresponding end of said switch blade for positively operating said load interrupters on further rotation of said switch blade so that neither load interrupter can operate ahead of the other and to open their load interrupting contacts at substantially the same point in a cycle of the load current to draw arcs therebetween to be extinguished by their respective are extinguishing means prior to disengagement of said disconnecting contacts from their respective load interrupters, said disconnecting contacts disengaging said load interrupters on still further rotation of said switch blade and being fully deenergized, said switch blade when rotated in the reverse direction effecting the aforesaid operations in reverse sequence."

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