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The sensitivity adjusting apparatus as set forth in claim 4 wherein said adjusting means is a threaded rod (222,224) interconnected with said control member (206) in such a manner so that as the threaded rod is rotated it will shift the control member and said transversely extending member (204) in such a manner that the sensitivity will be varied.ġ2. The sensitivity adjusting apparatus as set forth in claim 4 wherein said control member is a pivoted link (210) spring biased into engagement with said adjusting means.ġ1. The sensitivity adjusting apparatus as set forth in claim 8 wherein said link (210) is spring biased in one direction into engagement with said adjusting means, and wherein said adjusting means includes an element (222) shiftable towards or away from said link.ġ0. The sensitivity adjusting apparatus set forth in claim 7 wherein said control member is a link (210) pivoted at one end, said slot being disposed in a portion from said end.ĩ. The sensitivity adjusting apparatus set forth in claim 4 wherein said control member (206) is provided with a slot (220) which receives the transversely extending member (204).Ĩ.
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The sensitivity adjusting apparatus set forth in claim 4 wherein said transversely extending member is a pin (204).ħ. The sensitivity adjusting apparatus set forth in claim 4 wherein said guide surface is a slot (202).Ħ. A sensitivity adjusting apparatus for adjusting the sensitivity of a tractor draft sensing and control system provided with a draft sensing mechanism having an output link (37) shiftable along its length in response to changes in draft and a draft control linkage having an input arm (69) mounted for movement about a pivot (60) wherein the improvement comprises Ī guide surface (202) on the input arm (69) of the draft control linkage, opposed ends (234, 236) of the guide surface (202) being differing distances from said pivot (60) Ī transversely extending member (204) carried by said link (37), said member engaging said guide surface (202) Ī control member (206) interconnected with said transversely extending member andĪdjusting means (208) operable to selectively position said control member (206) whereby the sensitivity of the draft sensing control system may be varied.ĥ. The sensitivity adjusting apparatus set forth in claim 1 in which said interconnecting structure is a transversely extending member (204) carried by said link (37).Ĥ. The sensitivity adjusting apparatus as set forth in claim 1 in which said spaced apart locations are defined by a radially extending slot (202).ģ. Spaced apart connection locations (234, 236) on said input arm to which said interconnecting structure may be connected to vary the sensitivity of the draft control system.Ģ. Interconnecting structure on an upper end portion of said output link (37) and
MASSEY FERGUSON DRAFT CONTROL ADJUSTMENT FREE
A senstivity adjusting apparatus for adjusting the sensitivity of a tractor draft sensing and control system provided with a draft sensing mechanism and a draft control linkage, the draft sensing mechanism including a tractor housing (15) having spaced apart fulcrum supports, an elongated bendable shaft (17) mounted in the spaced apart fulcrum supports, draft members (5) connected to said shaft at points spaced outwardly of said tractor housing and operable to cause said shaft to bend when transmitting forces to said shaft, an elongated sensing arm assembly (27, 28) having a free end (31) and another end which is mounted on said elongated bendable shaft, and means to measure the movement of said free end, said measuring means including an output link (37) shiftable along its length in response to changes in draft the draft control linkage having an input arm (69) mounted for movement about a pivot (60) wherein the improvement comprises: