US897474A

US897474A - Indicating fuse plug and holder.

Info

Publication number: US897474A
Application number: US30181306A
Authority: US
Inventors: Claude E Mentzer
Original assignee: GEORGE L BETTCHER; LEON A FREEMAN
Current assignee: GEORGE L BETTCHER; LEON A FREEMAN
Priority date: 1906-02-19
Filing date: 1906-02-19
Publication date: 1908-09-01
Anticipated expiration: 1925-09-01

Description

PATENTED SEPT. 1, 1908.

C. E. MENTZER.

INDIGATING'FUSE PLUG AND HOLDER.

APPLICATION FILED FEB. 19, 1906.

, tridge is readily removable from the casing.

UNITED sTATEs PATENT oEErcE.

CLAUDE E. MENTZER, OF DENVER, COLO-BADO, A SIGNOROF ONE-THIRD TO LEON A. FREE- MAN AND ONE-THIRD TO GEORGE L- BETTCHER, OF DENVER, COLORADO.

INDICATING FUSE PLUG- AND HOLDER.

Specification of Letters Patent.

` Patented sept. 1, 190s.

To all whom 'it may concern:

Be it known that I, CLAUDE E. MENTZER, a' citizen of the United States, residing at the city and county of Denver and State of Colorado, have invented certain new and useful Improvements. in Indicating Fuse Plugs and Holders; and I do 'declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to an improvedfuse plug and holder.

tion consists in the fact that means are provided whereby the particular fuse burned out on a switch board containing a considerable number of fuses, is visually indicated without .opening the casing or removing the fuse therefrom, since the casing or holder is provided at its outer or forward extremity with a transparent member to permit the inspection of the fuse cartridge within the holder, the said transparent member being located directly in front of the indicating device, the

arts being arranged in such a manner that,

1f the fuse is blown or burned, the said device by its changed position will clearly indicate the fact to an observer.l

In my improved construction the car- This is accomplished by forming the casing in two' parts which are hinged together to vpermit the free opening of the casing after taking it off the cap and removing it from `the plug; while the mans for visually detectin a blown fuse consists ini running a wirek tglirough the fuse, the outer extremity of the wire being connectedwith a small plate'which is. actedv on by a spring, so` that a when the fuse is blown vvor broken, the'wire which holds-the smallplate'is also broken andthe tension of the spring forcesA the plate outwardly againsta transparent diaphragm through which the plateis visible froma po-l sition in front of the switch board thus clearly indicating that the fuse has been blown.

Having briefly outlined my improved con? struction as'wellas the function'itis intend!" v ed toperform, I pro'ceedto describe the p .sametin detail: reference be'ingmade tothe accompany' g drawing in which is illus trated an embodiment thereof.

In this drawing, Figure 1 is a section taken through a switch board, fuse plug and holder equipped with my improvements. Fig. 2 is anend elevation of Fig. 1 looking in the di rection of arrow 2. Fig.A 3 is a detail elevation of the casing which incloses the cartridge. Fig. 4 is a section taken through the casing showing the cartridge in elevation. Fig. 5 is a sectional view of the cartridge in detail before the fuse is blown. Fig. 6 is a similar view after the fuse is blown. Fig. 7 is a sectional view of the cap shown in detail. The same reference characters indicate the A same parts in all the views. A very important feature of my construclatter forming electrical contact with the two part casing 10. .This casing consists of a narrow cyhndrical part 12 of insulating material assing through inclosed by the metal part 12A which overlaps the porcelain members 13 at the inner extremity ofthe casing, while at its outer extremity the mtal part or sheath 12A is bent around the outer extremity of the insulatingv cylinderr as shown at 14 and projects inwardly and rearwardly forming a sort of spring, giving -the outer extremity of the c aslng a considerable degree of yielding capacity. Be-

tween this outer edge of the casing and the cap 15 which is screwed upon the casing, is

locatedV a ring 16 between which and the outer extremityy of the cap is located a trans,- parent diaphragm 17.

The cartridge which is inclosed by the'casing 10, consists of two end '

members

18 and 19 connected by an insulating tubular',mem-l ber 2O wherebythe end'members areinsulated from each other. Through the center of this cartridge and connecting the end members is'placeda fuse 21 through which is passed a w1ref22' Whose inner extremity is connected' `with the, en d member 19 'fo'f the ber 18 and the plate' 23.7," The wire 22 jpasses loosely throughifthe'outer memberr 18 of the 'cartrideso that when the, fuse and the wire` g are bro enas illustrated'in Fig. 6,-the spring `cartridge,'and whos'eouter extremity fiscorljA "nected with ajdis'k 23 acted upon by a coil A spring 24 interposedfb'etween ythe end meme"v 24 acting on the small plate which may be termed the indicator or indicating plate,

throws the latter outwardly against the transparent diaphragm 17 thus clearly indieating the particular fuse which has been blown.

In order to facilitate the removal from the case of the cartridge having the blown fuse, I

form the case in two parts which are con- 10 nected by a hinge pin25 which passes through the eyes of

hinge members

26 and 27 which are held in place byconducting pins 28 passed through the porcelain members 13 and connected with contacts 29. These contacts 29 15 together with the inner extremities of the pins 28, engage the end member 19 of they cartridge and form an electrical connection between said end member and the electrode 6 through the medium of the hinge members 26 20 and 27 both of which are engaged by one extremity of the electrode 6.

From the foregoing descri tion the use and operation of my improve device will be readily understood.

Assuming that the device is constructed as heretofore explained, the cartridge is placed within the casing and the casing inserted in the screw socket 8. The cap 15 is then a plied to the casing taking care to place tle ring 16 and the transparent diaphragm 17 in the cap before screwing it to position. As the cap is screwed upon thecasing, the ring 16v engages the yielding outer extremity of the casing which yielding extremity acts onthe cartridge to force its end member 19 tightly against the inner extremities of the pins 28 whereby electrical contact is made with the electrode.

The path of the current may be said to be from the circuit wire A through the electrode 7, the metal lining 9 of thecap 8, the metal part 12A of the casing 10, to' the outer end member 1 8 of the cartridge and thence through the fuse 21 to the end member 19 and thence through the pins 28 and the hinge members v26, 27 to the electrode 6 and thence through the other pole of the source (not shown) to the conductor B. Now assuming that the fuse is broken or blown as indicated in Fig. 6,

the spring 24 acting on the indicating device 23, will throw the latter. outwardly against the transparent diaphragm 17, thus making the indicator visible at a glance.

- Having thus described my invention, what I claim is:l

1. In a fuse cartridge and holder, the combination of a cartridge provided with a fuse,

an indicating device released by the burning of the fuse, a holder inclosing the cartridge and provided with a transparent member located in front of the indicating device, and

means for causing the said device to move to facilitate detection of the burned fuse.

2. A fuse cartridge provided with-a fuse and a slender device passing through the fuse seams and connected with an indicating device, and a coil spring adapted to act on the indicating device to move the same when the fuse is burned or blown.

3. A fuse cartridge composed of conducting end members, an insulating member connecting the conducting members, a fuse inclosed by the cartridge member and connecting the two end members, a wire passing through the fuse and made fast at one of the end members of the cartridge, the outer extremity of the wire passing loosely through vthe other end member, an indicating device connected with the outer extremity of the wire beyond the end member of the cartridge, and a a0 coil spring interposed between the end member of the cartridge and the indicating device for the purpose set forth.

4. A fuse cartridge provided with a fuse,

a spring-actuated indicating device held against movement when the fuse is intact but released and actuated by the spring when the fuse is burned, a shell inclosing the cartridge, and a cap applied to the outer extremity of the shell and having a transparent diaphragm located at some distance from the indicating device to allow the latter to move sufficiently for visual indication.

5. The combination of a fuse cartridge provided with a fuse, a spring-actuated indieating device normally held against movement but released to be actuated by the spring when the fuse is burned, the indicating device being located at the outer extremity of the fuse cartridge, a casing inclosing the fuse cartridge, a cap applied to the outer extremity of the casing, a ring interposed between the cap and the outer extremity of the cartridge, and a transparent diaphragm located between the ring and the outer extremity of the cap, the construction being such that a chamber is left between the transparent diaphragm andthe indicating device for the purpose set forth.

6. In combination, a fuse plug having a window, a fuse in said plug, indicating means held normally remote from the said window and means to cause the said indicating means to advance towards the said window by action of the blowing of the fuse. f

7. In combination, a fuse `plug having a diaphanous window, a fuse in said plug, indicating means held normally remote from said window, andmeans to cause contact lof the said indicating means and the said window byactionpf the blowing of the fuse. r

8.' In combination, a fuse plug having a window, a fuse contained therein, a plate. held normally remote from the said Window; .f and means to project the said late against glie window by action of the b owing of the 9. In combination, a fuse plug having a window, a fuse contained therein, a plate, means adapted to hold the plate remoteffrom said Window, and to release the same by action ofthe blowing ofthe fuse, and means to project the released plate toward the said window. f

10. ln combination, a fuse plug having a window, a hollow fuse therein, a plate nor mally held remote from the said window by a connection extending in close proximity to the said fuse, and a spring engaging said plate and adapted to project the atter towards the window when the said connection is broken.

11. ln combination, a fuse plug having a window, a plug cartridge contained therein, a fuse within said cartridge, a plate having a connection with the said cartridge adapted to be broken by action of the blowing of the fuse, and means to rject the said plate towards the said win ow subsequent to breaking the connection.

12. In combination, afuse plu having a window, a plug cartridge contalne therein, a i l In testimony whereof I ai'lix my signature in presence of two witnesses.

CLAUDE E. MENTZER. Witnesses: I

A. J. OBRIEN, DENA NELSON..