Window hinge

Claim 2

A hinge for pivotally supporting a window sash for angular opening and closing movement relative to a window frame, comprising, a. a window frame bar, b. a window sash bar, c. a plate slidably supported on said window frame bar, d. a first link pivotally connected to the plate and pivotally connected to the window sash bar, e. a second link pivotally connected to the window frame bar and the window sash bar, f. a third link pivotally connected to the plate and to said second link, and g. gearing connecting the first and third links for angular movement proportional to each other.

Claim 3

A hinge as defined in claim 1, wherein the plate has friction pads thereon engageable with the window frame bar and means urging the friction pads toward the window frame bar.

Claim 4

A hinge as defined in claim 1, wherein the window frame bar is formed with a channel and the plate comprises friction material slidably mounted in the channel and having bifurcated extensions at opposite ends, together with means biasing the bifurcated extensions outwardly to engage the side walls of the channel.

Claim 5

A hinge as defined in claim 3, wherein said biasing means includes a bowed leaf spring engaging the bifurcated extensions at each end of the friction plate to urge the latter outwardly.

Claim 6

A hinge as defined in claim 1, wherein the first link is relatively short and extends away from the second link when the window sash bar is in closed position, the second link is relatively long and extends toward the first link when the window sash bar is in closed position, the third link has a length intermediate the lengths of the first and second links, and said gearing comprises intermeshing gear teeth on the first and third links so that such links move equal angular distances relative to the friction device.

Claim 7

A friction hinge for pivotally mounting a window sash for angular opening and closing movement relative to a window frame, comprising, a. a window frame member adapted to be stationarily secured to a window frame, b. a window sash member adapted to be stationarily secured to a window sash, c. a friction device slidably mounted on the window frame member, d. a relatively short first link pivotally mounted on the friction device and pivotally connected to the window sash member adjacent one end of the latter to permit limited movement of said one end relative to said friction device, e. a relatively long second link pivotally mounted on said window frame member in spaced relation relative to said friction device and pivotally connected to said window sash member to permit relatively greater movement of the opposite end of the window sash member relative to the window frame member, f. a third link pivotally connected to the friction device and pivotally connected to the second link for retarding movement of the window sash member, and g. gearing connecting the first and third links for movement proportional to each other so that when said opposite end of the sash member swings outwardly, said one end of the sash member also swings outwardly.

Claim 8

A friction hinge for pivotally mounting a window sash for angular opening and closing movement relative to a window frame, comprising, a. a window frame member adapted to be stationarily secured to a window frame, b. a window sash member adapted to be stationarily secured to a window sash, c. a friction device slidably mounted on the window frame member, d. a relatively short first link pivotally mounted on the friction device and pivotally connected to the window sash member adjacent one end of the latter to permit limited movement of said one end relative to said friction device, e. a relatively long second link pivotally mounted on said window frame member in spaced relation relative to said friction device and pivotally connected to said window sash member to permit relatively greater movement of the opposite end of the window sash member relative to the window frame member, f. a third link pivotally connected to the friction device and pivotally connected to the second link for retarding movement of the window sash member, and g. gearing connecting the first and third links for movement proportional to each other so that when said opposite end of the sash member swings outwardly, said one end of the sash member also swings outwardly.

Claim 9

A window sash friction hinge as defined in claim 6, wherein the window sash member is mounted for movement from a retracted position in which the members confront each other and the links are substantially parallel with the members, to an extended position in which the window sash member is inclined relative to the window frame member, said second link extending toward said friction device and said first link extEnding away from said second link when the window sash member is in retracted position, and said gearing comprises intermeshing gear teeth on the adjacent ends of the first and third links, so that said one end of the window sash member moves outwardly and along the window frame member while said opposite end of the window sash member moves outwardly to an extended position relative to said window frame member.

Claim 10

A window sash friction hinge as defined in claim 6, wherein the friction device comprises a plate slidable on the window sash member and having friction pads engageable with the window frame member to yieldably hold the sash member in adjusted positions.