Combination fuse puller and fuse condition indicator
AssigneeLittelfuse, Inc.
InventorsHarry W. Olson, John M. Borzoni
Life of this patent
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AssigneeLittelfuse, Inc.
InventorsHarry W. Olson, John M. Borzoni
Estimating the term…
A fuse puller device comprises a pair of spaced confronting body portions respectively having confronting lower fuse-gripping jaw sections each formed by a wall terminating in a horizontally inwardly facing lip-forming projection adapted to underlie the overhung portion of a fuse housing head portion, the jaw sections respectively joining confronting finger-squeezable sections which effect a pivoting separation of the jaw sections when squeezed between the user's thumb and forefinger. The lip-forming projections have recesses which engage ribs on the fuse housing to center the fuse puller device. A fuse condition indicator unit mounted on the inner face of one of the jaw section walls has a pair of indicator terminals adapted to engage fuse continuity test terminals exposed on the head portion of the fuse housing to test whether or not there is continuity between the test terminals when the fuse puller device is applied over the head portion of the fuse.
A fuse puller device to be inserted over and behind the head portion of a fuse housing, which head portion overhangs a lower housing portion from which depend spaced confronting terminals configured for insertion into pressure clip terminals in a mounting block or the like, said housing head portion having exposed at the top thereof a pair of fuse continuity test terminals, said fuse puller device comprising a pair of spaced confronting body portions having confronting lower fuse housing-gripping jaw section means terminating at the bottom ends thereof in horizontally inwardly facing lips for underlying said fuse housing head portion so that an upward pulling force applied to the fuse puller will remove the fuse from said pressure clip terminals, said lower jaw sections respectively joining upper confronting finger-squeezable sections of said body portions of the-fuse puller device, the confronting jaw section means and finger squeezable sections being pivotally supported by resilient pivot-forming means extending between the vertical side margins of said body portions for pivotally supporting said jaw section means and resiliently biasing them toward each other and for allowing a separation movement therebetween when said finger squeezable sections are squeezed, said body portions defining therebetween a fuse continuity indicator-receiving cavity opening onto the top of said fuse puller device and configured for accepting a continuity indicator unit which provides an indication of the fuse condition, said cavity being open at the bottom of said fuse puller device so that indicator terminals can contact said fuse continuity test terminals exposed on said fuse housing when the fuse puller device is applied over said fuse housing, and a continuity indicator unit mounted in said cavity, said indicator unit having a pair of downwardly facing indicator terminal means for engaging said fuse continuity test terminals, said indicator unit having means for providing a visible indication of fuse continuity between said test terminals when the fuse puller device is applied over the head portion of the fuse.
In a fuse puller device to be inserted over and behind the head portion of a fuse housing, which head portion overhangs the opposite sides of a lower housing portion from which depend spaced confronting terminals configured for insertion into pressure clip terminals in a mounting block or the like, said fuse puller device comprising a one-piece synthetic plastic molded unit having a pair of spaced confronting body portions respectively having confronting lower fuse housing-gripping jaw section means terminating in horizontally inwardly facing lips for underlying said fuse housing head portion so that an upward pulling force applied to the fuse puller device will remove the fuse from said pressing clip terminals, said jaw section means respectively joining upper confronting finger-squeezable sections of said body portions of the fuse puller device which effect pivoting separation of the jaw sections when squeezed between the user's thumb and forefinger, the improvement wherein there is provided extending between said confronting body portions of the fuse puller device pivot-forming means for pivoting said jaw section means and formed by downwardly bowed, semi-rigid but deformable arcuate straps extending between the vertical side margins of the confronting body portions of the fuse puller device, the squeezing of said upper squeezable sections bringing the ends of said straps closer together to effect pivoting of the jaw section means to move the lower ends of said jaw section means away from each other.
In a fuse puller device to be inserted over and behind the head portion of a fuse housing, which head portion overhangs a lower housing portion from which depend spaced confronting terminals configured for insertion into pressure clip terminals in a mounting block or the like, said lower housing portion having immediately below said head portion laterally facing discontinuity-forming means, said housing head portion having exposed at the top thereof a pair of fuse continuity test terminals, said fuse puller device including a pair of confronting body portions having a pair of confronting fuse-gripping jaw section means terminating at their lower ends in confronting inwardly facing lips for underlying the overhanging portion of said head portion of said fuse housing, said jaw section means joining at their upper ends confronting finger squeezable sections, the improvement wherein there is provided between the confronting surfaces of said body portions means for receiving a fuse condition indicator unit having a pair of downwardly facing indicator unit terminal means for engaging said fuse continuity test terminals exposed on the head portion of a fuse housing so as to enable said indicator unit to test whether or not there is continuity between the test terminals, and wherein at least one of said confronting body portions has fuse puller device centering means for positioning said jaw sections on the head portion of said fuse housing to position said indicator unit terminal means to make contact with said fuse continuity test terminals.
In a fuse puller device to be configured for insertion over and behind the head portion of a fuse housing, which head portion overhangs the opposite sides of a lower housing portion from which depend spaced confronting terminals inserted into pressure clip terminals in a mounting block or the like, said lower housing portion having immediately below said head portion laterally facing discontinuity-forming means, said housing head portion having exposed on the outer side thereof a pair of fuse continuity test terminals, said fuse puller device having a pair of spaced confronting body portions respectively having confronting lower fuse-gripping jaw section means each formed by a wall terminating in horizontally inwardly facing lip-forming projection for underlying said fuse housing head portion so that an upward pulling force applied to the fuse puller will remove the fuse from said pressure clip terminals, said jaw section means respectively joining confronting finger-squeezable sections of said body portions of the fuse puller for effecting a pivoting separation of the jaw sections when squeezed between the user's thumb and forefinger, said inwardly facing lip-forming projections in the absence of any finger pressure applied to the device being spaced apart a distance such that said engaging surfaces underlie said head portion of the fuse housing, at least one of said lip-forming projections having a discontinuity-forming means of configuration complementary to said discontinuity-forming means of said head portion of said fuse housing and disposed so that when the fuse puller device is properly centered with respect to said fuse housing said discontinuity-forming means will snap into interfitting relationship, the improvement wherein there is provided between the confronting surfaces of said body portions means for receiving a fuse condition indicator unit having a pair of downwardly facing indicator terminals configured to engage said fuse continuity test terminals exposed on the head portion of a fuse housing so as to test whether or not there is continuity between the test terminals when the fuse puller device is applied over the head portion of the fuse.
In a fuse puller device to be inserted over and behind the head portion of a fuse housing, which head portion overhangs a lower housing portion from which depend spaced confronting terminals configured for insertion into pressure clip terminals in a mounting block or the like, said lower housing portion having immediately below said head portion laterally facing discontinuity-forming means, said housing head portion having exposed at the top thereof a pair of fuse continuity test terminals, said fuse puller device including a pair of confronting body portions having a pair of confronting fuse-gripping jaw section means terminating at their lower ends in confronting inwardly facing lips for underlying the overhanging portion of said head portion of said fuse housing, said jaw section means joining at their upper ends confronting finger squeezable sections, the improvement wherein there is carried by one of said jaw section means a fuse condition indicator having a pair of downwardly facing indicator terminal means for engaging said fuse continuity test terminals exposed on the head portion over said fuse housing when said jaw section lips underlie said head portion of said fuse housing.
Dependencies are inferred from the claim text.