Claims
- 1. An electrically-powered, hand-held staple driving tool comprising:
- (a) a housing;
- (b) a mainframe channel having a wall;
- (c) a device for electrically connecting said mainframe channel to a grounding wire, said grounding and mounting device comprising:
- (i) a screw with one enlarged end, on threaded end, and a throat between them;
- (ii) a flat ended electrical lug having a first end adapted to receive the threaded end of said screw therethrough and a second end adapted to receive and secure said grounding wire;
- (iii) a mounting plate having an opening adapted to freely receive the threaded end of said screw and to forcibly receive the throat of said screw, said screw being passed through said opening in said first end of said grounding lug and forcibly pressed with an interference fit into said opening in said mounting plate so that said grounding lug is pressed firmly between the enlarged end of said screw and the opposing surface of the mounting plate, the threaded end of said screw further passing through a hole in said housing and then through a hole in said wall of said mainframe channel; and
- (iv) a nut on the threaded end of said screw so that when tightened in the normal manner, the first end of said grounding lug, the mounting plate, the wall of said housing and the wall of said mainframe channel are, respectively, sandwiched between said enlarged end of said screw and said nut.
- 2. An electrically-powered, hand-held staple driving tool comprising:
- (a) a housing; said housing having a lower wall with an opening therethrough;
- (b) a mainframe channel having an upper wall with a first hole and a second hole therethrough;
- (c) a device for mounting said upper wall of said mainframe channel to said housing and electrically connecting said mainframe channel to a grounding wire, said mounting and grounding device comprising;
- (i) a screw with one enlarged end and one threaded end;
- (ii) an elongated grounding strip having a first end, a second end, and a middle portion between them, said first end being adapted to receive and secure said grounding wire, said middle portion having an opening adapted to receive therethrough the threaded end of said screw, and said second end having two spaced apart fingers, each of said fingers having a downward, right angle bend therein, a throat portion extending longitudinally downward a predetermined distance from said bend, the sidewise distance between the outside edges of the throat portions of said fingers being slightly less than the corresponding width of the first hole in said upper wall, said fingers further comprising convex projections extending outwardly and edgewise from the edges of each of said fingers near the endmost portions of said fingers, said projections having slanted upper edges inclined outwardly and downwardly from said throat portion, said second end with the projections thereon being adapted to be resiliently received through said first hole in said upper wall until said projections are substantially through said first opening so that spring tension of the fingers will urge said fingers sidewise and outwardly against the inside of said first opening;
- (iii) a mounting plate having an opening adapted to receive the threaded end of said screw, the threaded end of said screw then being inserted, in turn, through said opening in said lower wall of said housing, through said opening in said middle portion of said elongated grounding strip, and through said second hole in said upper wall of said mainframe channel; and
- (iv) a nut on the threaded end of said screw, all parts being assembled so that when said nut is tightened in the normal manner, said mounting plate, said lower wall of said housing, said grounding strip and said upper wall of said mainframe channel are, respectively, sandwiched between said enlarged end of said screw and said nut.
- 3. The device as defined in claim 2, wherein said predetermined length of said throat portion is slightly less than the thickness of said upper wall of said mainframe channel so that when said fingers having the projections thereon are pressed into said first hole in said upper wall of said mainframe until said projections are substantially through said hole and all parts are properly assembled with the nut tightened in the normal manner, spring tension will urge the fingers sidewise and outwardly so that the slanted upper edge of the projections will wedge against the lower edge of said first hole in said upper wall of said mainframe channel.
- 4. The device as defined in claim 2, further comprising means for mechanically securing said grounding strip to said upper wall of said mainframe channel independently of said screw.
- 5. The device as defined in claim 2, wherein said slanted upper edge of said projection is inclined away from said throat portion at an angle of between 25 and 65 degrees from the horizontal.
Parent Case Info
This application is a division of Ser. No. 076,327, filed July 22, 1987, which is a division of application Ser. No. 794,305, filed Nov. 1, 1985, now U.S. Pat. No. 4,700,876.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3786978 |
Manganaro |
Jan 1974 |
|
4458835 |
Le et al. |
Jul 1984 |
|
Divisions (2)
|
Number |
Date |
Country |
Parent |
76327 |
Jul 1987 |
|
Parent |
794305 |
Nov 1985 |
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