US973250A - Electric fuse. - Google Patents

Description

I. E. BARRIGKLOW.

' ELEGTBIG FUSE.

ArPLmA'rIoN FILED P31340, 1910.

Patentd OCE. 18, T910.

UNITED sTArsns rfrENT ermee.

IEVIN E. BLRRIUKLOW, 0F ANTIOCH, CALIFORNIA..

ELECTRIC FUSE.

Specification of Letters Patent.

Patented Oct. 18, 1910.

Application med February 10, 1910. Serial No. 548,076.

To all whom 'it may concern.'

Be it known that I, InvIN E. Bamucumw, a citizen of the United States, residing at Antioch, in the county of Contra Costa and State of California, have invented new and useful Improvements in Electric Fuses, of which the followin is a specification.

This invention relates to a. non-arcing fuse or cut-out for electric circuits and relates more particularly to a fuse of the inclosed t yfhe invention has for one of its objects to improve and simplify the construction of fuses of this character so as to be comparatively simple and inexpensive to manufactu re, reliable and eliicient in use and so designed that the fusible element can be applied with great facility and despatch and with perfect safety to the electrician.

Another object of the invention is the prosion of on improved casing for the fusible element and fire proof insulating powder, whereby access to the casing can be had for removing the burnt stubs o the fusible element for replacing by a new element, the latter being secured to the terminals or blades by simple clamping means.

With these objects in view, and others as will appear as the description proceeds, the invention comprises the various novel foatures of construction and arrangement of parts which will be more fully described hereinafter and set forth with partioularity in the claims appended hereto.

In the accompanying drawings, which illustrates one embodiment of the invention, Figure 1 is a erspective view of the fuse, a

ortion of this outer shell broken away. ig. 2 is a vertical longitudinal sectional view of the fuse. Fig. 3 is a horizontal sectional view thereof. Fi ft is a transverse section on line alc-i of hiv. 9.. Fig. 5 is a perspective view of the modied form ofthe blade and terminal piece.

Similar reference characters are employed to designate corresponding parts throuhout the veral views.

Referrinfr to the drawings, A designates the body of the device, which is made of porcelain, or other equivalent insulating material and is com osed of two sections 1 and-2, that are divisible lon 'tudinal of the body. The body A is provi( ed with a chamber 3 formed mrtly in each section for containing the fusible element 4 and the fire proof powder 5, in which the element is embedded. Extending into the end of the body A and between the sections thereof are blades or external pieces 6 that are set in recesses 7 in the op face of the sections 1 and 2 of the b y and the inner ends of these blades G are provided with clam ing plates 8, which secure the fusible e ement thereto. These plates have apertures 9 through which pass headed screws 10, which are threaded in the blades 6 and by loosening the screws, the fusible element can be inserted under the clamping plates, or between the latter and blades. The blades nre held ln place by screws 11, which serve also to connect the. two sections 1 and 2 nf the body.

Access to the fusible element L is provided through a. lon itudinal opening l2 in the section l of the dy A, which opening is normally closed by a. cover 13, that set-s mto the opening so that the outer surface of the cover will be flush with the outer face of the body A This cover is held in place by a tubular shell 14, which slides longitudinal on and oif the body A, but having a snug fit thereon. By this means, no special fastoning is required for the cover plate 13, and by merely removing the shell longitudinally the-cover is accessible for the purpose of rcnewing the fusible element. The tubular cover retainer or shell llcovors the joint between the cover 13 and the body or casing A so that there is no danger of moisture entorl'ug the casing und making the powder In Fig. 5 a modified form of blade or terminal piece 6 is shown, the same consisting of a strip of metal doubled back on itself to form parallel portions 15 and 16, the free extremity of the portion 15 being oiset at '17 to form a. jaw coperating with the extremity 18 of the portion 16 to grip the end of a fusible element, the jaw being clamped by a. screw 19.

From the foregoing description taken in connection with the accompanying drawings, the adv'antages of the must-rml ion and of the method of operation will be readily apparent tu those. skilled in the art to which the invention relates, and while I have described the principle of operation of the. invention, to ther with the device which I now consi er to be the best emlmdiment thereof, I desire lo have it understood that, the device shown is merely illustrative and that such elmnges muy be nando when dosired as are wit sin the scopo of the inve". tion.

What I c'luirn us new nml desire to secure by Letters-Patent is:

1. In un electric fuso including u easing provided with an opening, n cover for the opening, a fusible clement 1n the easing, und a retainer for the cover slidnble longitudinelly on the casing and covering the joint between the said cover and casing.

2. In an electric fuse including a casing provided with an opening, a cover for the openin, a fusible element in the casing, and a tubu r retainer for the cover removable from the casing.

3. In an electric fuse, comprising a casing having a longitudinal opening, a cover for the opening, a fusible clement in the casing, and a retainer surrounding the easing to form the sole means for holding the cover in (place and closing the joint between the sal cover and casing.

4. A device of the class described, comprising a casing having an opening, a cover set into the opening, a current conducting means in the casing, and a tubular retainer surrounding the casing and removable therefrom to hold the cover in place.

5. A device of the class described, comprising a casing provided with an opening, a cover for the o ening, and a cover retainer sldably mount on the casing and extendinx over the cover and removable from ei er end of the casing.

6. A device of the class described, compulsing n eontnim'er split longitudinally im two sections, une nl the sentirme lnwiig nu opening, n euvel. Het into the opening, termilml pieces extending into the casing, nii-:ms for sec\1rilag tho sections of: the onsing lo1 gather, :t fusible element eoimeoted with the terminal pieces, und n hollow cover retainer surrounding the easing und freely slidnlilc thereon, said retainer being of a greater length than the cover to cover the joint betweenltbe latter and section into which the cover 1s set.

7., An electric fuse, eoniprisino a casing, having openings at opposite endcs, terminal pieces extending into thc o nin bolts passing transversely through t e en s of the casing and through the terminal pieces, clam ing plates on the inner ends of the termina pieces, a fusible element havin its ends secured between the clamping p stes and terminal ieces, clamping screws passing through t e plates and terminal pieces, said easing being composed of sections divisible in the lane of the terminal pieces and held toget er by the said bolts, one of the sections having an opening through which the fusible element is accessible, a cover for the opening, and a removable shell of the same length as and surrounding the easing to form a retainer for the cover.

In testimony whereof I ax my signature in presence of two witnesses.

IRVIN E. BABRICKLOW.

Witnesses:

J. EDWARD RAIsoH, A. C. Hemmer.

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