Abstract: A portable screen assembly includes: a casing having an opening extending in a longitudinal direction on the upper surface thereof, and formed by a pair of separable case members that extend in the longitudinal direction; a spring-biased roll rotatably mounted in the casing; a screen wound around the spring-biased roll in a storage position and extended from the opening in use; a top bar fixed to one end of the screen which is used as a cover body to close the opening in the storage position; and an extendable column having one end erectably pivoted from a center part of a side face of the casing to hold the screen in a stretched state.

Abstract: A portable screen assembly includes: a casing having an opening extending in a longitudinal direction on the upper surface thereof, and formed by a pair of separable case members that extend in the longitudinal direction; a spring-biased roll rotatably mounted in the casing; a screen wound around the spring-biased roll in a storage position and extended from the opening in use; a top bar fixed to one end of the screen which is used as a cover body to close the opening in the storage position; and an extendable column having one end erectably pivoted from a center part of a side face of the casing to hold the screen in a stretched state.

Abstract: A portable screen assembly includes: a casing having an opening extending in a longitudinal direction on the upper surface thereof, and formed by a pair of separable case members that extend in the longitudinal direction; a spring-biased roll rotatably mounted in the casing; a screen wound around the spring-biased roll in a storage position and extended from the opening in use; a top bar fixed to one end of the screen which is used as a cover body to close the opening in the storage position; and an extendable column having one end erectably pivoted from a center part of a side face of the casing to hold the screen in a stretched state.

Abstract: A portable screen assembly includes: a casing having an opening extending in a longitudinal direction on the upper surface thereof, and formed by a pair of separable case members that extend in the longitudinal direction; a spring-biased roll rotatably mounted in the casing; a screen wound around the spring-biased roll in a storage position and extended from the opening in use; a top bar fixed to one end of the screen which is used as a cover body to close the opening in the storage position; and an extendable column having one end erectably pivoted from a center part of a side face of the casing to hold the screen in a stretched state.

Abstract: A portable screen assembly includes: a casing having an opening extending in a longitudinal direction on the upper surface thereof, and formed by a pair of separable case members that extend in the longitudinal direction; a spring-biased roll rotatably mounted in the casing; a screen wound around the spring-biased roll in a storage position and extended from the opening in use; a top bar fixed to one end of the screen which is used as a cover body to close the opening in the storage position; and an extendable column having one end erectably pivoted from a center part of a side face of the casing to hold the screen in a stretched state.

Abstract: A portable screen device including a casing, an extendable screen, and an extendable screen supporting column which has one end pivotally supported at a center portion of a back surface of the casing. The column can be pivoted to an extended position for holding the screen in an extended state. The column includes a plurality tubular members which slide with respect to each other. A lowermost tubular member has a first column lock mechanism for engaging the lowermost tubular member with an adjacent, upper tubular member to maintain the column at a desired height. A column lock releasing mechanism including a pedal is provided for releasing the engagement between the lowermost tubular member and the upper tubular member.

Abstract: There is provided a portable screen device which has a smaller size, a smaller weight and a simple structure and is easy to handle. The present invention relates to a portable screen device including an expendable column having one end erectably pivoted at a center portion of back surface of a casing and, in an erected state, holding the pulled out screen in a stretched state. The column is constituted by a plurality of tubular members which can sidably extend and contract with respect to one another, wherein the tubular members are configured in the form of a nest. The lowermost tubular member is provided with a first column lock mechanism for engaging the lowermost tubular member with the upper tubular member next thereto to maintain the column at a predetermined height. Further, there is provided a column lock releasing mechanism for releasing the engagement between the lowermost tubular member and the upper tubular member next thereto, in conjunction with the pressing of a pedal.

Abstract: A portable screen assembly includes a casing having an opening extending in a longitudinal direction on the upper surface thereof and formed by a first and second case members that extend in the of longitudinal direction and are separable from each other, a spring-biased roll rotatably mounted to the casing, a screen wound around the spring-biased roll in storage and pulled out from the opening in use, a top bar fixed to one end of the screen and used also as a cover body to close the opening in storage, and an extendable column having one end erectably pivoted at a center part of the side face of the casing and, in an erected state, holding the pulled out screen in a stretched state. Thus, the portable screen assembly having reduced size and weight, capable of being easily handled and formed in a simple structure can be provided.

Abstract: A fine crystalline thin wire of a cobalt base alloy having a composition of the formula;CokMlBmSinwhere Co is cobalt; M is at least one of the transition metals of groups IV, V and VI of the periodic table; B is boron; Si is silicon; K, l, m and n represent atom percent of Co, M, B and Si, respectively, and have the following values:k=40-78l=10-50m=2-15n=8-20and the fine crystal grains in the thin wire having an average size of no more than 5 .mu.m.