US993968A - Snap-switch with inclosed fuse. - Google Patents

Description

P. 0. DE REAMER. SNAP SWITCH WITH INGLOSED FUSE.

APPLICATION FILED APR. 22. 1906.

1. w m m J a 0 e 3 R W r e M WP w c M W m H U H u 5 w m 3 w m fi u H V \11! 4 a mi 0 m 2 1 "I V WW I Z 4 Wu flu 3 k mm x TED e ie- FRANK 0. DE REAM B. or scnnnEorAnY, NEW YORK, AssIeNon T0 G NER L ELEc- TBIG Y. A conronarron on NEW YQRK.

' s'NAr-swrren wrrH mcrosnn ruse To all whom 'it may concern:

Be it known that I, FRANK C. DE REAMER," a citizen of the United States, residing-at- Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Snap-Switches with Inclosed Fuses, of which the following is a specification.

This-invention relates to mechanical cutouts, and its object is to provide a switch of the perpendicular blade type, having asnap or quick-opening action, and carrying in its blade-structure an inclosedfuse, so that the switch serves not only as a mechanical cutout, but as an automatic thermal cut-out as well. The fuse is removable from the carrier, so that a new one can be substituted for it after it has blown.

In the accompanying drawing, Figure 1 is a side elevation of my improved switch; Fig. 2 is a sectional View of the pivotal end of the switch, on a larger scale; Fig. 3 is a front view of the lower end of the fuse and its carrier; and Fig. 4 is a similar view on the line 44, Fig. 2.

A base 1 ofinsulating material supports two clips 2, 3, to which are attached, respectively, the two terminals 4 of the circuit controlled by the switch. Through the clip 3 passes a transverse pivot pin 5, on which is pivoted a carrier for the fuse. The preferred form of carrier consists of a leaf 6 fastened at one edge, as by the riveted studs 7 to two U-shaped pieces of sheet metal arranged at right angles. The piece 8 is of heavier-stock, and has on each of its arms ears 9 through which pass bolts .10 to hold the arms rigidly in place. The other U- shaped piece 11 is made of lighter stock, and is wide enough to nearly fill the space between the arms of the piece 8, forming a spring clamp between the bolts 10, making good electrical contact with the blade 12.,

The two pieces 8 and 11 together constitute a receptacle for the contact blade 12 on one end of the fuse; which can be retained in place by a set screw 13 passing through one arm of the piece 8. I

There is nothing novel in the fuse proper, which consists of the customary barrel M of insulation, provided with metallic caps 15 through which project the blades 12, 16'

which are connected electrically with the ends of the fuse strip inside the barrel. The

length of the fuseis such that when one Y Fig. 1.

blade 16 will enter the YPivotally mounted on the pivot pin 5 is an actuator for the carrier and fuse, comprising preferably a strip of sheet metal doubled at the points 17 to form two legs 18, which are spaced apart to straddle. the clip 3 and are pivoted on the pin 5. On one leg is an arm 19, which is apertured to receive at its outer end one end of a spring 20, whose other end is" attached to the carrier. Insidev the bight of the actuator is secured a nut 21, into WhlChqlS screwed the shank of a handle 22. A- cross-bar 23 may be fastened to the.

legs of the actuator under the nut.

The operation is as follows :-One blade of a fuse is inserted into the carrier and secured by the set screw. On moving the handle upward, the carrier is actuated by the arm 19, which is normally held by the spring in contact with the piece 8, as shown in Fig. 1. This movement therefore closes the outer'end-blade 16 of the fuse into the clip2, so that the parts assume the position shown in 'Fig. 1. This closes the circuit between the terminals 4, the current being carried by the fuse, which is thus in position to melt and open the circuit on an overload. If a it be desired to open the circuit by hand, the

handle is moved downward. The-friction of the clip 2 holds the fuse stationary until the cross-bar 23 of the actuator strikesthe projecting end 24 of the leaf 6 and forces the upper blade 16 out of the clip 2. The spring 20 having been put under tension by the movement .of the handle, now acts to quickly withdraw the blade from the clip, and thus breaks the are instantly.

What I claim as new and desire to secure by Letters Patent of the United States, is,

Specification of Letters Patent. Patented 30, 1911: Application filed Apri122,1905.. Serial no. 256,592. I

blade 12. is held in the carrier, the other clip 2, as shown in 1. In a switch, the combination with two terminal clips, of a carrier pivoted in one of them, and an inclosed fuse having blades projecting axially from the ends thereof, one of which is removably, secured in said carrier, the other blade being adaptedto enter the other clip.

2. In a switch, the combination with ter minal clips, of a short carrier pivoted in one of said clips, an inclosed fuse having knife blade terminals one of which is adapted to engage the other of said clips, means for rigidly clamping-the other of said terminals to the outer end of said carrier, and an actushaped piece secured to said leaf, ears on each arm of said piece, bolts connecting said .U-shaped piece.

ating handle pivoted on the clip to which 7 5. In a switch, the combination with a the carrier is pivoted. terminal clip, of a leaf pivoted therein, and

3. In a switch, the combination with a t'ertwo U-shaped pieces secured thereto at right 15 minal clip, of a leaf pivoted therein, a U- angles to each other, one of said pieces being made of resilient metal to form a spring clamp.

In witness whereof, I have hereunto set my hand this 21st day of April, 1905.

FRANK C. DE REAMER. Witnesses: HELEN .Onronn, G. C. HOLLISTER.

ears, and clamping means carried by said 4. In a switch, the combination with a terminal clip, of a leaf pivoted therein, and two U shaped pieces secured thereto at right angles to each other.

Copiesof this patent may be obtained for live cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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