Hacksaw machine
OwnerAlfred Wilbsinventor
Life of this patent
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Abstract
A hacksaw machine comprises an upper and a lower horizontal bracket, a swinging arm in each one of the brackets and a driving mechanism for pivoting the lower swinging arm. A saw-blade connects the front ends of the swinging arms. The lower swinging arm is twice as long as the upper arm. Both swinging arm are tensioned in opposite directions by springs respectively which are adjustably fastened at the brackets. The swinging mechanism is independent on the lengths of the brackets.
Claims10
A hacksaw machine comprising a U-shaped frame consisting of a first and a second horizontal bracket spaced one above another and an upright post, a first swinging arm pivotably mounted in the first bracket and a second swinging arm pivotably mounted in the second bracket, an eccentric or cranked shaft driving means connected with the first swinging arm, a saw-blade fastened at the front ends of the first and second swinging arms and spring means engaging with at least one of the first and second swinging arms for tensioning the saw-blade characterized in that the swing radius of one of the swinging arms is substantially twice as great as that of the other one and that the spring means comprises a spring one end thereof fastened at the second swinging arm and the other end thereof fastened at the second bracket.
Dependencies are inferred from the claim text.