The 31-year-old Newbury has one assist and 66 penalty minutes in 19 regular-season games over three seasons for New York. His lone appearance this season with the Rangers was Jan. 24 at Philadelphia.
Newbury has four goals, four assists and 130 penalty minutes in 67 career NHL games over seven seasons with the Rangers, Toronto, and Detroit.
In 62 games this season with Connecticut, Newbury has 18 goals and 38 assists. He is the team leader in assists and points and is tied for first in goals.
Halpern, a 36-year-old checking forward, had one assist and was minus-5 in 30 games for New York.