CHANGEABLE TIP TWEEZERS AND THE LIKE

• US 3,818,784 A
• Filed: 01/03/1973
• Issued: 06/25/1974
• Est. Priority Date: 01/03/1973
• Status: Expired due to Term

• Current Assignee: Edgar M. Mcclure
• Original Assignee: Edgar M. Mcclure
• Inventors: McClure, Edgar M.
• Primary Examiner(s): Simpson, Othell M.
• Assistant Examiner(s): Parker, Roscoe V.
• Application Number:
  US05/320,817
• Time in Patent Office: 538 Days
• Field of Search: 81/43 128/354 294/99
• US Class Current: 294/99.2
• CPC Class Codes: B25B 9/02 without sliding or pivotal connections, e.g. tweezers, onepiece tongs

Abstract

Changeable tip tweezers formed of a handle portion having a pair of resilient arms extending in a V-shaped path from a heel end and terminating in outwardly opening channel recesses, receiving substantially wedge shaped mounting formations on the rear ends of changeable tips. The surfaces of the mounting formations are engaged and positioned by confronting surfaces of the channel recesses to precisely aline the tips, and enlarged circular nut members of larger diameter than the vertical width of the tweezers hold the tips on the handle portion and provide rest supports and finger discs.

Claims

1. Changeable tip tweezers comprising a handle Portion including a pair of elongated resilient arms having corresponding rearward ends joined together forming a heel end, the arms normally extending in forwardly diverging relation and having front ends normally disposed in laterally spaced apart relation, the front end portions of each arm having a channel recess opening through the end surfaces and outer surfaces thereof, the channel recesses having flat base surfaces disposed in selected forwardly convergent planes when the arms occupy their normal forwardly diverging positions and a pair of shoulder surfaces flanking each base surface, a pair of elongated, forwardly converging removable tip members extending from said front end portions and terminating in forward working ends, said tip members having integral mounting formations at their rearward ends to be respectively nested in said channel recesses, the mounting formations having three precision shaped surfaces including an inner face and a pair of opposing shoulders adjoining the face to be abutted and precisely positioned by said base and shoulder surfaces of the channel recess for locating the two tip members in accurate preselected relative alinement, and threaded fasteners carried by said arms and extending through said mounting formations having manually rotatable head members lying outwardly of the arms to be manipulated for mounting and demounting of the tips on said arms, said head members having portions projecting beyond the lower edges of the arms adjacent their front ends to define a pair of transversely spaced rest surfaces coactive with the heel end portion to provide threepoint support of the tweezers on a horizontal surface.

2. Changeable tip tweezers as defined in claim 1, wherein said channel recesses are of wedge shaped configuration providing triangular upper and lower surfaces defining said opposing shoulders having their apices pointing toward the heel end.

3. Changeable tip tweezers comprising a handle portion including a pair of elongated resilient arms having corresponding rearward ends joined together forming a heel end, the arms normally extending in forwardly diverging relation and having front ends normally disposed in laterally spaced apart relation, the front end portions of each arm having a channel recess opening through the end surfaces and outer surfaces thereof, the channel recesses having flat base surfaces disposed in selected forwardly convergent planes when the arms occupy their normal forwardly diverging positions and a pair of shoulder surfaces flanking each base surface, a pair of elongated, forwardly converging removable tip members extending from said front end portions and terminating in forward working ends, said tip members having integral mounting formations at their rearward ends to be respectively nested in said channel recesses, the mounting formations having three precision shaped surfaces including an inner face and a pair of opposing shoulders adjoining the face to be abutted and precisely positioned by said base and shoulder surfaces of the channel recess for locating the two tip members in accurate preselected relative alinement, and threaded fasteners carried by said arms and extending through said mounting formations having manually rotatable head members lying outwardly of the arms to be manipulated for mounting and demounting of the tips on said arms, said head members being circular threaded members of greater diameter than the maximum transverse dimension of each tweezer arm providing enlarged finger discs to be engaged by the user'"'"''"'"'s fingers and the circular edges of which define a pair of rest surfaces coactive with the heel end portion to provide three-point support of the tweezers on a horizontal surface.

4. Changeable tip tweezers as defined in claim 3, wherein said channel recesses are of wedge shaped configuration providing triangular upper and lower surfaces defining said opposing shoulders having their apices pointing toward the heel end.

5. Changeable tip tweezers as defined in Claim 3, wherein said tip members each have two-stage mounting formations of stepped configuration at their rearward ends, the stages providing a pair of apertured stage formations shaped to precisely nest into the companion channel recesses of the tweezer arms at two longitudinally spaced positions and providing outwardly facing flat landings which lie in parallel planes when the arms occupy their normal positions to be abutted by restraining surface portions of said head members.

6. Changeable tip tweezers as defined in claim 1, wherein said channel recesses are of wedge shaped configuration providing triangular upper and lower surfaces defining said opposing shoulders having their apices pointing toward the heel end and said shoulders being in parallel planes perpendicular to the base surface therebetween and parallel to the longitudinal center axis of the tweezers.

7. Changeable tip tweezers as defined in claim 6, wherein said tip members each have two-stage formations of stepped configuration at their rearward ends, the stages providing a pair of apertured stage formations shaped to precisely nest into the companion channel recesses of the tweezer arms at two longitudinally spaced positions and providing outwardly facing flat landings which lie in parallel planes when the arms occupy their normal positions to be abutted by restraining surface portions of said head members.

8. Tweezers, comprising a pair of elongated elements defining a handle portion formed of a pair of elongated resilient arm portions having corresponding rearward ends joined together forming a heel end, the arm portions normally extending in forwardly diverging relation and having portions intermediate the length of the tweezers normally disposed in laterally spaced apart relation, said tweezers including a pair of elongated, forwardly converging tip portions extending from said intermediate portions to the working end of the tweezers and terminating in working points, said tip portions being joined to said arm portions and positioned in accurate preselected relative alignment, and a pair of manually rotatable head members lying outwardly of the arm portions threadedly mounted thereto at said intermediate portions, said head members forming threaded members having edge portions projecting beyond the lower edges of said arm portions at said intermediate portions to define a pair of transversely spaced rest surfaces coactive with the heel end portion to provide three-point support of the tweezers on a horizontal surface.

9. Tweezers as defined in claim 8, wherein said threaded members are cylindrical members of greater diameter than the maximum transverse dimension of each tweezer arm portion and have outwardly concave surfaces providing enlarged finger discs to be engaged by the user'"'"''"'"'s fingers and the circular edges of which define said pair of rest surfaces.