down relative to the holes to an overlap with the lower margin of the holes the studs being just long enough relative to fit of the scissors legs for frictional retention this adjustment is conveniently at hand to one lying on the bed height adjustment is preferred but it will be evident that each scissor leg could have only one hole instead as shown the lower ends may be transverse to the length with the corners giving a non skid effect on bedding to support the foot end of the assembly the set of legs 26 comprises a pair of folding legs 56 58 pivoted respectively by pins at 60 62 between a pair of parallel spaced bridging members 64 66 fixed transversely within the side guides 44 46 unfolded each leg comes to rest in an outwardly splayed position against a respective side or side guide of the second slide limiting unfolding to a predetermined angle preferably two bridging members are used for better support against longitudinal loading of the assembly transmitted through the legs although one alone would function but might require heavier frame members legs and pivots folded these legs overlap nearly in plane in the center preferably these legs are located about one foot 0 3 m from the foot end of the assembly so that the cantilever end can provide tolerance in longitudinal location of the assembly on a bed and to permit hanging an electric blanket free of the end of the bed for ventilation if desired height adjustment of the legs 56 58 can be made by means of rigid shoes 68 with raised bottom 70 and top socket 72 these may be of plywood or plastic.