Parallel holder device

A holder device for selectively positioning and retaining a pair of parallels against a pair of vise jaws comprising:

• stationary and movable retaining members,
• guide means for maintaining said retaining members parallel to one another during movement between an extended position wherein said retaining members are at maximum spacing and a retracted position wherein said retaining members are at minimum spacing, said guide means including a pair of parallel spaced inner tubes secured at adjacent ends to said stationary retaining member and a pair of parallel spaced outer tubes secured at adjacent ends to said movable retaining members, said outer tubes slidably telescoping over said inner tubes with said inner tubes passing through holes in end portions, of said movable retaining member, and open ends of said outer tubes,
• force applying means for resiliently urging said retaining members to said extended position and resisting movement toward said retracted position, said force applying means including a coil spring disposed inside each of said inner tubes and arranged to elongate when said retaining members are moved toward one another to produce forces tending to spread said retaining members apart,
• whereby when said retaining members are disposed between a pair of vise jaws disposed apart a distance less than said maximum spacing distance said retaining members resiliently urge a pair of parallels against said vise jaws through a range of spacing positions for said vise jaws.

A holder device for selectively positioning and retaining a pair of parallels against a pair of vise jaws comprising:

• first and second retaining members,
• guide means or maintaining said retaining members parallel to one another during movement between a first position wherein said retaining members are at maximum spacing and a second position wherein said retaining members are at minimum spacing, said guide means including a pair of parallel spaced inner tubes secured at adjacent ends to said first retaining member and a pair of parallel spaced outer tubes secured at adjacent ends to said second retaining members, said outer tubes slidably telescoping over said inner tubes with said inner tubes passing through holes in end portions of said second retaining member and open end portions of id outer tubes, each said inner tube having an elongated slot cut out along the longitudinal axis thereof, said slot extending along said inner tube,
• force applying means for resiliently urging said retaining members to said first position and resisting movement toward said second position, said force applying means including a helical spring disposed inside each of said inner tubes and opposite said first retaining member, each said spring being attached at one end to an associated end of said inner tue and in which said spring is attached at its other end to an associated end of said outer tubes, each said spring being attached to said outer tube by means of a curved end potion hooking over a pin rigidly connected to an end portion of said outer tube, said pin extending axially inward from an outside edge of said outer tube,
• whereby when said first and second retaining members are disposed between a pair of vise jaws disposed apart a distance less than said maximum spacing distance said retaining members resiliently huge a pair of parallels against said vise jaws through a range of spacing positions for said vise jaws.