Gear tooth test feeler
First Claim
1. A gear tooth test feeler for a gear tooth testing machine, comprising;
- a sensing lever;
said sensing lever defining a plane of deflection and having a first end, a second end, an intermediate region adjacent said second end, a first side, a second side opposite said first side and a neutral position;
a feeler tip mounted on said first end;
a measuring system mounted on said second end;
a carrier member;
first pivot bearing means for deflectably mounting said sensing lever within said carrier member to perform a deflection substantially in said plane of deflection;
said first pivot bearing means being of a construction which generates a counter-force which increases substantially in proportion to said deflection of said sensing lever;
a first rocking lever;
a second rocking lever;
said first rocking lever being arranged on said first side substantially coincident with said plane of deflection and at said intermediate region of said sensing lever;
said second rocking lever being arranged on said second side substantially coincident with said plane of deflection and at said intermediate region of said sensing lever;
each of said first rocking lever and said second rocking lever having an initial position;
second pivot bearing means for said first rocking lever;
third pivot bearing means for said second rocking lever;
a first stop member for said first rocking lever;
a second stop member for said second rocking lever;
said first rocking lever being positioned between said carrier member and said sensing lever by said second pivot bearing means and said first stop member, and said second rocking lever being positioned between said carrier member and said sensing lever by said third pivot bearing means and said second stop member such that said first rocking lever and said second rocking lever maintain said sensing lever in said neutral position and such that when said sensing lever performs said deflection out of said neutral position, said sensing lever selectively either entrains said first rocking lever and leaves said rocking lever in said initial position thereof or entrains said second rocking lever and leaves first rocking lever in said initial position thereof;
a first magnet member;
a second magnet member; and
said first magnet member and said magnet member being selectively both mounted on said sensing lever for exerting a magnetic force of attraction counter to said counter-force upon a respective one of said first rocking lever and said second rocking lever or being individually mounted on respective ones of said first rocking lever and said second rocking lever for exerting said magnetic force of attraction upon said sensing lever.
1 Assignment
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Accused Products
Abstract
The gear tooth test feeler contains a sensing lever pivotally journalled in a carrier member by means of a cross-spring joint. The cross-spring joint generates a counter-force which increases in proportion to the angular deflection of the sensing lever. Two rocking levers are arranged on opposite sides of the sensing lever. The two rocking levers are positioned between the carrier member and the sensing lever by further pivot bearings and stop members such that the rocking levers maintain the sensing lever in a central position and such that the sensing lever entrains one of the rocking levers whenever the sensing lever deflects while the other rocking lever retains its initial position and vice-versa. Two permanent magnets fastened to the sensing lever exert a magnetic force of attraction upon each of the ferrous rocking levers. When the sensing lever deflects, one of the permanent magnets moves away from its associated rocking lever, so that the magnetic force of attraction exerted upon the rocking lever diminishes. The algebraic addition of this diminishing magnetic force of attraction and the increasing counter-force of the cross-spring joint produces a constant contact pressure of a feeler tip of the sensing lever against a gear tooth flank being sensed throughout its deflection displacement path. The sensing lever is deflectable out of its central position in both directions without requiring a switching operation for selectively sensing right hand and left hand gear tooth flanks.
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Citations
11 Claims
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1. A gear tooth test feeler for a gear tooth testing machine, comprising;
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a sensing lever; said sensing lever defining a plane of deflection and having a first end, a second end, an intermediate region adjacent said second end, a first side, a second side opposite said first side and a neutral position; a feeler tip mounted on said first end; a measuring system mounted on said second end; a carrier member; first pivot bearing means for deflectably mounting said sensing lever within said carrier member to perform a deflection substantially in said plane of deflection; said first pivot bearing means being of a construction which generates a counter-force which increases substantially in proportion to said deflection of said sensing lever; a first rocking lever; a second rocking lever; said first rocking lever being arranged on said first side substantially coincident with said plane of deflection and at said intermediate region of said sensing lever; said second rocking lever being arranged on said second side substantially coincident with said plane of deflection and at said intermediate region of said sensing lever; each of said first rocking lever and said second rocking lever having an initial position; second pivot bearing means for said first rocking lever; third pivot bearing means for said second rocking lever; a first stop member for said first rocking lever; a second stop member for said second rocking lever; said first rocking lever being positioned between said carrier member and said sensing lever by said second pivot bearing means and said first stop member, and said second rocking lever being positioned between said carrier member and said sensing lever by said third pivot bearing means and said second stop member such that said first rocking lever and said second rocking lever maintain said sensing lever in said neutral position and such that when said sensing lever performs said deflection out of said neutral position, said sensing lever selectively either entrains said first rocking lever and leaves said rocking lever in said initial position thereof or entrains said second rocking lever and leaves first rocking lever in said initial position thereof; a first magnet member; a second magnet member; and said first magnet member and said magnet member being selectively both mounted on said sensing lever for exerting a magnetic force of attraction counter to said counter-force upon a respective one of said first rocking lever and said second rocking lever or being individually mounted on respective ones of said first rocking lever and said second rocking lever for exerting said magnetic force of attraction upon said sensing lever. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification