Патент USA US2406262код для вставки
> Aug. 20, 1946.. ' L. H. STAUFFER 2,406,262 CURRENT COLLECTOR Filed Oct. 8, 1943 Inventor: Lynn H.Stauff‘er',' by x/ ml Himtorneg. Patented Aug.20, 1946 2,406,262 UNITED STATES PATENT OFFICE 2,406,262 CURRENT COLLECTOR Lynn H. Staliffer, Pattersonville, N. Y., assignor to General Electric Company, a corporation of New York Application October 8, 1943, Serial No. 505,447 6 Claims. (01. 1'71--320) 1 2 My invention relates to current collectors and _ particularly to current collecting devices such as Metal (percentages) are used with dynamoelectric machines and are adapted to be contacted by a brush. Alloy No. Copper Zinc Lead Tin An object of my invention is to provide an im~ 5 proved current collector made of a copper base so as. 5 0. 7s 0. 7(5) alloy. s4 is 'o l 69 30 0 l Further objects and advantages of my inven tion will become apparent and my invention will be better understood from the following descrip- 1;,‘ While I have mush-med and described partic tion referring to the accompanying drawing, and may embodiments of my invention, modi?cations the features of novelty which characterize my invention will be pointed out with particularity in the claims annexed to and forming part of this Speci?cation. theregf W111 occur to those skilled in the art. I desire it to be understood, therefore, that my in_ Vention is not to be hmited to the particular and 15 rangements disclosed, and I intend in the append rI‘he drawing shows a brush and a fragmentary ed Claims to cover an modi?cations which do not View of a commutator embodying my invention. depart from the spirit and scope of my invention. Referring to the drawing, I have Shown a 0111“ What I claim as new and desire to secure by rent collector in the form of a commutator inLetters Patent of the United States, is: cllldi'rlg a plurality of commutator bars l0 adapt- :20 1. A current collector member adapted to be ed to be contacted by a brush ll made of any contacted by a brush and for a dynamoelectric suitable material, such as carbon, and provided machine formed of a copper base alloy including with a conventional pigtail conductor for profrom 60% to 85% copper and 40% to 15% zinc. viding an electrical connection between the brush 2. A current collector member adapted to be H and a conventional brush holder terminal. It 25 contacted by a brush and formed of a copper has been found that when current collectors oDbase alloy including from 60% to 85% copper and crate in dry and rare?ed atmospheric conditions, 40% to 15% zinc, with from 0.5% to 4% lead, a carbon or graphite base brush tends to Wear away very rapidly when the current collector which the brush contacts is formed of copper, and ‘0.5% to 2% tin. 3. A current collector member adapted to be contacted by a brush and formed of a copper as in the conventional construction. Ihave found that if the current collector member is formed base alloy including substantially 60% copper, substantially 38.5% zinc, 0.75% lead, and 0.75% of a copper base alloy including from 60% to 85% copper and 40% to 15% zinc, the life of the com tin 4. A current collector member adapted to be tact brush is greatly increased. In addition, I 3” contacted by a brush and Emma of a copper have found that if such a current collector alloy base alloy mcludmg ,Substantlany 615% copper’ also is provided with a small percentage of lead or tin or both lead and tin, similarly greatly in- substantla’ny 354% Zmc’ and 3'1% lead‘ 5' A current cotlector member adapted m be creased brush life may be expected. More spe- contacted ‘b-y 9’ bush and fol-“med of a copper ci?cally, the lead content should preferably be 40 ggggtaaéiggnglnféléglgicslggsgainél?g 84% copper’ from 05% to 4% and the tin content from 05% 6. A current collector member adapted to be to 2%. The following four compositions ‘ of this contacted by a brush and formed of a copper type alloy have been found to be particularly base alloy including substantially 69% copper, bene?cial in increasing brush life when used in 45 substantially 30% zinc, and 1% tin. making commutators or collector rings; LYNN H. STAUFFER.