Adjustable roof scaffold jack

Claim 1

An adjustable roof scaffold jack means for positioning on a pitched roof of a building, which jack means is capable of presenting a horizontal surface adapted to receive a portion of a platform for workmen to work on an area of said building comprising: an elongated inverted T shaped base member in cross section having an upper end and a lower end and being capable of affixation to a roof, said leg of said inverted T being of a height less than the width of the top of said T; an elongated T shaped supporting member in cross section wherein the top of said T forms a surface to receive a platform and said leg of said T is of a height less than the width of said top of the T yet greater than the height of said leg of said base member and said supporting member is pivotally connected to said base member; adjustment means in the form of telescoping members one within the other, whereby one is secured in end wise position on the platform supporting member and one is secured in end wise position on the base member, and a plurality of adjustment holes in each member and pin means insertable therethrough to fix the elevation of said platform supporting member; pivot means including a pair of spaced apart side plates secured to either side of said leg of said base member and said side plates extend higher than the height of said leg of said T wherein said leg of said T of said supporting member is interfitted therebetween and a pivot pin passes therethrough; stabilizer means affixed to the top of said T of said base member and projecting outwarldy of said base member wherein there is a first plate member at the upper end of said base member on each side of said base member of a length greater than the width of said base member and a second plate member at the lower end of said base member projecting on each side of said base member of a length greater than the length of said first plate member and each of said plate members adopted to be secured to said roof.