. Journal of electricity. apply casters to an arm chair. There-fore, the specific claim would not be invalidated bysuch prior publication. The foregoing illustrates the value of obtainingnarrow, specific claims as well as broad, genericclaims. NEW IDEAS FROM THE WEST Switch Patent No. 1,247,751, issued to John A. Van Alstyne of Sacramento, California, discloses a novel form of knife switch. The switch is of the solenoid release type and is enclosed in a casing having a handle on the outside for closing the switch. 92 JOURNAL OF ELECTRICITY [Vol. 40—No. 2 The switch consists of one or more swit
. Journal of electricity. apply casters to an arm chair. There-fore, the specific claim would not be invalidated bysuch prior publication. The foregoing illustrates the value of obtainingnarrow, specific claims as well as broad, genericclaims. NEW IDEAS FROM THE WEST Switch Patent No. 1,247,751, issued to John A. Van Alstyne of Sacramento, California, discloses a novel form of knife switch. The switch is of the solenoid release type and is enclosed in a casing having a handle on the outside for closing the switch. 92 JOURNAL OF ELECTRICITY [Vol. 40—No. 2 The switch consists of one or more switch blades, each bladeconsisting ot two members hinged together and connected attheir hinges to standards. Contact members are providedwhich are engaged by the outer ends of both members, thelower contact members being connected to the line and theupper contact members being connected to the motor. A fuse to wipe along the rear end of the intercepted portion of thewater jet when the wheel is rotating at normal speed, and. connects each lower contact member with each central stand-ard, so that when both members of a blade are in contactpositions, the fuse is shunted and when the lower blade mem-ber is out of contact, the fuse will be in circuit. In startingthe motor, both sides of the switch are closed and after themotor picks up its load, the lower blades are opened to placethe fuses in series. Safety Device for BoilersPatent No. 1,247,244, issued to Daniel J. Duggan ofEverett, Washington, shows a safety device for oil fired boil-ers which is controlled either by the level of the water in the
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Keywords: ., bookcentury1900, bookdecade1910, bookidjo, booksubjectelectricity
