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公开(公告)号：US4252239A
公开(公告)日：1981-02-24
申请号：US40637
申请日：1979-05-21
申请人： Raymond C. Snyder
发明人： Raymond C. Snyder
CPC分类号： B23D57/0092 , B27B5/243 , B27B9/00 , Y10S312/902
摘要： Relates to a combination carpenter's portable power operated hand saw and table saw in which the hand carrying case forming the table of the combination approximates in size that of travel suitcases and similar forms of luggage. The case is provided interiorly with guides for receiving and removably suspending a power driven hand saw in inverted or upside down relationship to the normal usage of the portable saw such that the blade of the saw is projectionable through a slot in the top of the case for cutting purposes. Means is provided inside the case for withdrawing the blade from the slot through which it projects when not in use and for tilting the blade to selection positions for making inclined cuts. Means is provided externally of the case for guiding the work product being cut, the guiding member for this purpose being slidably movable varying distances from the plane of the blade. Means is also provided for knock down packaging of the parts of the case for shipping purposes.
摘要翻译： 关于木匠的便携式动力操作手锯和桌子锯，组合桌子的手提箱的尺寸与行李箱和类似行李的大小相当。 壳体内部设置有用于接收和可拆卸地悬挂动力驱动的手锯的引导件，其以与便携式锯的正常使用相反或上下颠倒的关系，使得锯的刀片通过壳体顶部的槽可投影， 切割目的。 在壳体的内部设置有用于将刀片从不使用时突出的狭槽中取出并将刀片倾斜到用于进行倾斜切割的选择位置的装置。 在壳体的外部设置有用于引导待切割的工件的装置，用于该目的的引导构件可从叶片的平面可变地移动。 还提供了用于拆卸用于运输目的的壳体部件的包装的手段。
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公开(公告)号：US4046584A
公开(公告)日：1977-09-06
申请号：US681504
申请日：1976-04-29
申请人： Raymond C. Snyder , Paul F. Snyder
发明人： Raymond C. Snyder , Paul F. Snyder
CPC分类号： C04B28/02 , C04B22/0093 , C04B24/2664 , C04B2111/00482
摘要： There is disclosed a liquid accelerating additive for wet concrete which has a long shelf stability and which is ideally suited for use in shotcreting applications. The accelerating additive is a composition of sodium and potassium aluminates having the proportions of from 15 to about 40 weight percent alumina, and from 10 to about 25 weight percent of each of sodium and potassium, expressed as the oxides. The balance of the additive is water.The invention also includes a method of shotcreting in which wet concrete is sprayed against the surface of a structure, typically the wall and/or ceiling of a subterranean tunnel or cavern while incorporating in the wet concrete mixture a sufficient quantity of the liquid accelerating additive to control the setting of the concrete coating. The liquid accelerating additive can be incorporated into the concrete mixture by blending it into the water ingredient of the concrete which is admixed with a premixed, dry, solid component that includes the cement and aggregate or, if desired, can be blended into the wet concrete as the concrete is sprayed onto the surface.
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