首页>
外国专利>
An Improved Appliance for Teaching Swimming.
An Improved Appliance for Teaching Swimming.
展开▼
机译:一种改进的游泳教学用具。
展开▼
页面导航
摘要
著录项
相似文献
摘要
22,582. Alexander, F. W. Sept. 29. Swimming-appliances.-Relates to apparatus for supporting a learner while performing the various movements necessary for swimming. A frame b supports uprights a, from which is adjustably suspended a body-support d. Forward of the uprights are hinged supportsf carrying brackets h in which are journaled a crank spindle h1 carrying pinions h2. A ladder e pivoted to the frame b forms a support for the hands and arms of the learner, and is adjusted by a rack g slidable in the supports f and engaged by the pinions h2.
展开▼