Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
234 words
In an arrangement for supporting a bed for vertical movement, while remaining horizontal, between a position of non-use adjacent a ceiling of a room and a position of use adjacent a floor of a room, a pair of parallel vertical columns extending between and fixed to the floor and ceiling of the room, said columns being hollow and having outer walls directed away from each other and formed with longitudinal slots, a pair of elongated guides situated within said columns and also being formed with longitudinal slots, the latter slots being aligned with the slots of said columns, and said guides occupying only a part of the interiors of said columns, respectively, a pair of horizontal frame members carrying a spring and extending horizontally across said outer walls of said columns, said frame members respectively carrying guide members which extend through said slots into said guides to be guided by the latter for vertical movement, a counterweight situated in one of said columns in the space therein which is not occupied by the guide therein, pulleys situated at the tops of said columns, and a pair of cables extending from said counterweight around said pulleys respectively to said frame members to which said cables are connected so that the one counter-weight is connected through said cables to both of said frame members for counterbalancing the weight of the latter and the spring carried thereby.
Claim 2
Dependent Claim
234 words
In an arrangement for supporting a bed for vertical movement, while remaining horizontal, between a position of non-use adjacent a ceiling of a room and a position of use adjacent a floor of a room, a pair of parallel vertical columns extending between and fixed to the floor and ceiling of the room, said columns being hollow and having outer walls directed away from each other and formed with longitudinal slots, a pair of elongated guides situated within said columns and also being formed with longitudinal slots, the latter slots being aligned with the slots of said columns, and said guides occupying only a part of the interiors of said columns, respectively, a pair of horizontal frame members carrying a spring and extending horizontally across said outer walls of said columns, said frame members respectively carrying guide members which extend through said slots into said guides to be guided by the latter for vertical movement, a counterweight situated in one of said columns in the space therein which is not occupied by the guide therein, pulleys situated at the tops of said columns, and a pair of cables extending from said counterweight around said pulleys respectively to said frame members to which said cables are connected so that the one counter-weight is connected through said cables to both of said frame members for counterbalancing the weight of the latter and the spring carried thereby.
Claim 3
Dependent Claim
123 words
The combination of claim 1 and wherein a second pair of frame members extend horizontally across said outer walls of said columns and are situated respectively beneath the first-named frame members, a second counterweight in the other of said columns, occupying space therein which is not occupied by the guide therein, additional pulleys at the tops of said columns, and a second pair of cables connected to the second counterweight and extending around the additional pulleys to the second pair of frame members to which the second pair of cables are connected, so that a second spring carried by the second pair of frame members and the latter are counter-balanced by the second counterweight which is situated in the other of said columns.
Claim 4
Dependent Claim
60 words
The combination of claim 2 and wherein there are three pulleys at the top of each column, one for guiding a cable from a counterweight to an adjoining frame member, the second for guiding a cable from the other column to an adjoining frame member, and a third for directing a cable from one to the other of the columns.
Claim 5
Dependent Claim
54 words
The combination of claim 3 and wherein the three pulleys at the top of each column are arranged with two of said pulleys adjacent the outer wall of each column and the third pulley adjacent the inner wall of each column, all of said pulleys being rotatable about axes parallel to said frame members.
Claim 6
Dependent Claim
23 words
The combination of claim 4 and wherein the third pulley at the top of each column is smaller than the other two pulleys.