I claim the ornamental design for the hinged sign bracket, as shown and described.
FIG. 1 is a front perspective view of a of hinged sign bracket shown reduced in scale and positioned to connect a sign to a shelf demonstrating one use mode of my invention;
FIG. 2 is a front perspective view of a of hinged sign bracket shown reduced in scale and positioned to connect a sign to a shelf demonstrating another use mode of my invention;
FIG. 3 is a front perspective view of the hinged sign bracket shown in FIGS. 1 and 2, enlarged and showing my new design thereof;
FIG. 4 is a top plan view of FIG. 3;
FIG. 5 is a bottom plan view of FIG. 3;
FIG. 6 is a rear elevation view of FIG. 3;
FIG. 7 is a front elevation view of FIG. 3;
FIG. 8 is a right side elevation view of FIG. 3; and,
FIG. 9 is a left side elevation view of FIG. 3.
The broken line representations of sign and shelf in FIGS. 1 and 2 are for the purpose of illustration and form no part of the claimed design.