US3273236A

US3273236A - Electrically operated cutter for cutting the armor of armored cable

Info

Publication number: US3273236A
Application number: US372767A
Authority: US
Inventors: William A Mcdowell
Original assignee: Individual
Current assignee: Individual
Priority date: 1964-06-05
Filing date: 1964-06-05
Publication date: 1966-09-20
Anticipated expiration: 1983-09-20

Description

Sept. 20, 1966 w. A. M DOWELL ELECTRICALLY OPERATED CUTTER FOR CUTTING THE ARMOR 0F ARMORED CABLE Filed June 5, 1964 INVENTOR.

i0 WJZZK/W (4 United States Patent 3,273,236 ELECTRICALLY OPERATED CUTTER FOR CUT- TING THE ARMOR 0F ARMORED CABLE William A. McDowell, 266 Randolph Ave., Emerson, NJ. Filed June 5, 1964, Ser. No. 372,767 1 Claim. (Cl. 30-905) My invention is directed toward an electrically operated cutter for cutting the armor away from armored cable to expose the conductors therein.

It is an important object of the invention to provide an electrically operated cutter for cutting the armor of armored cable which is simple to operate and economic-a1 to produce.

Another object is to provide a new and improved cable cutter wherein the depth of cut into the cable armor can be varied as described.

Still another object is to provide a new and improved cable cutter [having a pistol grip and a trigger switch whereby the cutter can be operated in one hand.

All of the foregoing and still further objects and advantages of my invention will now be explained with reference both to this specification and to the drawing wherein:

FIGURE 1 is a partially cut away, side elevational view of my invention;

FIGURE 2 is an enlarged fragmentary bottom view thereof;

FIGURE 3 is an enlarged fragmentary opposite side view thereof;

FIGURE 4 is a front view thereof; and

FIGURE 5 is an exploded view of certain parts thereof.

Referring now to the drawing (FIGURES 1-5), there is shown a horizontal hollow casing having a vertical pistol grip 12 extending downward therefrom. Casing 10 contains an electric motor 14 having a horizontal drive shaft 16 extending from one end therefrom.

A two conductor electric cable 18 connected at one end to plug 20 extends through the grip 12, one conductor 22 going directly from grip 12 into casing 10 to make contact with one terminal 24 of the motor, the other conductor 26 being connected to a movable contact 29 controlled by trigger 30 (which is spring loaded at 32). A second fixed contact 28 is connected by still another conductor 34 to a second terminal 36 on motor 10. When the grip is held in one hand and trigger 30 is depressed, the motor is energized (providing power is supplied to plug 20), and drive shaft 16 turns. When finger pressure on trigger 30 is released, the spring forces trigger 30 outward to break the connection between

contacts

28 and 29 to turn the motor off.

A second casing 40 is connected to casing 10. Shaft 16 extends into casing 40* and terminates in a first bevel gear 42. A second bevel gear 44 at right angles to gear 42 is engaged therewith. Gear 44 carries a horizontal shaft 46 extending transversely of shaft 16. One end of shaft 46 carries a circular cutting blade 48 which is rotated in a plane parallel to the axis of shaft 16.

A bottom plate 50 carries a slot 52 through which a 3,273,236 Patented Sept. 20, 1966 portion of blade 48 extends. One end 60 of plate 50 carries a vertical member 62 which is screwed to casing 40. The other end 64 of plate 50 carries a second vertical member 66 having a slot 72. An end plate 68 is screwed to casing 40 and receives a bolt 70 extending through slot 72. By loosening bolt 70, the end 64 can be raised or lowered by shifting the position of slot 72 with respect to bolt 70, whereby the depth of cut of blade 48 into cable armor can be set, bolt 70 being thereafter tightened to hold the desired set.

While I have described my invention with particular reference to the drawing, my protection is to be limited only by the terms of the claim which follows.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

An electrically operated cutter for cutting the armor of armored cable comprising:

a first casing;

:an electric motor in the first casing and having a drive shaft connected thereto;

a pistol griup depending downward from the first casa trigger switch mounted in the pistol grip;

means for feeding electrical energy to the electric motor and the switch such that closing the switch energizes the electric motor and rotates the drive shaft;

a second casing attached to the first casing such that the drive shaft extends into the second casing;

there being positioned in the second casing:

a first bevel gear mounted on the drive shaft;

a shaft extending transversely of the drive shaft;

a second bevel gear mounted on the shaft and engaging the first bevel gear such that the shaft rotates when the electric motor is energized;

a circular cutting wheel secured at its center to one end of the shaft such that it rotates in a plane parallel to the axis of the drive shaft when the shaft rotates;

a plate having two ends and a slot therein, afiixed at one end thereof to the bottom of the second casa portion of the circular cutting wheel projecting downward through the slot;

means for moving the other end of the plate toward and away from the second casing while the one end remains afiixed to the casing such that the portion of the circular cutting wheel projecting downward through the slot varies to thereby vary the depth of cut of the circular cutting wheel in the armor of the armored cable.

References Cited by the Examiner UNITED STATES PATENTS 2,457,417 12/1948 Trautmann 3092 2,885,764 5/1959 Shulters et a1. 819.5 X 2,989,806 6/1961 Davis 3090.5 3,182,532 5/1965 Oehlerking 8l9.5

WILLIAM FELDMAN, Primary Examiner.

MYRON C. KRUSE, Examiner.