Variable feed drive mechanism

Details Variable feed drive mechanism Variable feed drive mechanism

1974-09-26

1976-11-16

Scott, Samuel

Machine element or mechanism

Mechanical movements

Rotary to intermittent unidirectional motion

F16H 2904

Patent

active

039916308

ABSTRACT:
A variable feed drive mechanism comprises a novel linkage for delivering an adjustable amount of motion from a reciprocating drive lever to a unidirectional clutch output mechanism. A first linking member is pivotally joined to the distal end of the reciprocating lever and disposed substantially perpendicular thereto. An adjustment lever is joined at one end to a fixed pivot, and a second linking member is pivotally joined at one end to a distal portion of the adjustment lever, and at the other end to the distal end of the first linking member. A third linking member is pivotally joined at one end to an arm extending from the ratchet-clutch mechanism, and is pivotally joined at the other end to the junction of the first and second linking members. The ratchet-clutch, fixed pivot, and drive lever are arrayed in a triangle, with the adjustment lever extending into the triangle, so that rotation of the adjustment lever toward the drive lever increases the amount of motion transmitted to the ratchet-clutch mechanism.

REFERENCES:
patent: 3071990 (1963-01-01), Uhtenwoldt
patent: 3213697 (1965-10-01), Hartmann et al.
patent: 3512423 (1970-05-01), Schuitemaker

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