Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A single-turn variable resistance device comprised of: a. a housing of thermoplastic material having a substantially cylindrical cavity therein; b. an annular resistance element located approximately at the bottom of said cavity and attached to said housing; c. a plurality of termination pins, each having a portion thereof molded into said housing, including two resistance element termination pins electrically connected to the ends of said resistance element and a collector termination pin; d. a substantially disk-shaped cover member adapted to fit into an open end of said cavity; e. a resilient contact member attached to the underside of said cover for adjustably contacting a portion of said resistance element and simultaneously contacting a portion of said collector termination pin; and f. a sealing member disposed between said cover member and a portion of said housing for providing contamination protection for said resistance element; wherein said housing includes retaining nub means extending within said cavity adjacent the open end thereof for retaining said cover member in said cavity.
Claim 2
Dependent Claim
167 words
A single-turn variable resistance device comprised of: a. a housing of thermoplastic material having a substantially cylindrical cavity therein; b. an annular resistance element located approximately at the bottom of said cavity and attached to said housing; c. a plurality of termination pins, each having a portion thereof molded into said housing, including two resistance element termination pins electrically connected to the ends of said resistance element and a collector termination pin; d. a substantially disk-shaped cover member adapted to fit into an open end of said cavity; e. a resilient contact member attached to the underside of said cover for adjustably contacting a portion of said resistance element and simultaneously contacting a portion of said collector termination pin; and f. a sealing member disposed between said cover member and a portion of said housing for providing contamination protection for said resistance element; wherein said housing includes retaining nub means extending within said cavity adjacent the open end thereof for retaining said cover member in said cavity.
Claim 3
Dependent Claim
33 words
A device as in claim 1 wherein a heat formed lip of said housing is located adjacent the open end of said cavity so as to permanently retain said cover within said cavity.
Claim 4
Dependent Claim
15 words
A device as in claim 1 wherein said resistance element is of the wirewound type.
Claim 5
Dependent Claim
27 words
A device as in claim 3 wherein said resistance element has been heat-inserted into said housing and a portion of said housing fixedly secures said resistance element.
Claim 6
Dependent Claim
26 words
A device as in claim 4 wherein said housing includes raised portions at the bottom of said cavity which have been heat-bonded to said resistance element.
Claim 7
Dependent Claim
24 words
A device as in claim 1 wherein said contact member includes a resistance element contacting tip which is roughened to minimize contact resistance variation.
Claim 8
Dependent Claim
20 words
A device as in claim 1 wherein said contact member includes a resistance element contacting tip which is rhodium plated.
Claim 9
Dependent Claim
20 words
A device as in claim 1 wherein said contact member has been attached to said cover member by heat staking.
Claim 10
Dependent Claim
39 words
A device as in claim 1 wherein said two resistance element termination pins each include a small, integral projection on the heads thereof which extend into the cavity to which the ends of said resistance element have been connected.
Claim 11
Dependent Claim
46 words
A device as in claim 1 further including a housing stop member extending into said cavity and a mating stop member on said cover member which is adapted to engage said housing stop member when the desired limit of rotation of said cover has been reached.