US1112156A

US1112156A - Fuse-switch.

Info

Publication number: US1112156A
Application number: US80337013A
Authority: US
Inventors: Thomas E Murray
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-11-28
Filing date: 1913-11-28
Publication date: 1914-09-29
Anticipated expiration: 1931-09-29

Description

T. E. MURRAY.

FUSE SWITCH.

@PPLIGATION FILBD11oV-2s, 1913,

1 1 1 2, 1 56. Patented sept. 29', 1914.

miem/w13 THOMAS n. MRRAY, or New YORK, 'u Y,

Specification of Letters 'tent.

Patented sept. '29, 1914.

Application filed November :28, 1913. Serial No. 803,370.

To all whom it may concern: i

Be it known that I, THOMAS E. MURRAY, a Citizen of the United States, residing at New York,` in the county ofI New York and State' of New, York, have invented a certainnewy and useful Improvement' in. Fuse- Switches, of lwhich the 'following is a specification. r

The invention isa fuse switch of simple .'construction, in whichpa removable cylindrical cartridge fuse'case coperates with contacts disposed in a tubular casing. The tuse iOng a longitudinallygrooved arm 8 which case or plug is provided with an insulating handle, by which it maybe introduced into or removed from the casing..

In the accompanying dr'awings-Figure 1 is a longitudinal section of my fuse switch. Fig. 2is a cross section on the line A, A ot Fig. 1. Fig. 3 is a bottom view of the insulating block.

Similar numbers of reference indicate like parts.

The tubular metal casing comprises a 4body portion 1, screwed at its ends into sleeves 2, 3, and side projections 4, 5 screwed into offsets on the walls ot said sleeves.

Within the body portion lis a tubular lin` ing 6 of insulating material, closed at its' upper end. Within. said closed endl is dise osed an inverted cupfshaped'contact 7, hav- 1 enters projection 4 through anopening in lining 6. Above the arm 8 is a plate 9 of insulating material, shaped, as shown in Fig. 3, to lit upon arm 8 and to rest upon the closed end of lining 6. Above the plate 9 may be a spacing block 10 of insulating matcr1al,upon which bears a screw plug l1 entering the upper extremity 'of sleeve 2. Also in projection 4 is an insulating block 12 `grooved to receive a grooved metal plate 13 lower part, of lining 6 is an annular Contact 19, having anarm 20 which enters projection 5 through an opening in said lining and is shaped similarly to arm 8. Above enten* sion 20 is an insulating block 21, secured in place by screw 22. rThe other circuit terlniinal 23 is"received between arm 20 and plate 18.

24 is a cartridge fuse case, having the usual metalv end caps 25,26. Said fuse case is secured to a handle 27 -of insulating material by a screw 28 countersunk in said handle. On the exterior of sleeve 3 are spring hooks 29 which engage with afiange 30 on said handle.

When it is desired to bring the fuse into circuit, the Jfuse case 24, by-means of handle 27, is inserted as a plug into body portion 1 until end cap 25 is seated in contact 7, when end cap 26 registers with contact 19, thus completing circuit from one terminal, as 14, through the fuse to the op osite terminal 23.

In the embodiment o my device here shown, the hooks 29 first enter vertical recesses 3 1 in the edge of ange 30 and then enter circumferential recesses having upperV inclined undercut edges 32. By rotating the handle, 4the edges 32 running over the hooks ends jam the upper end cap of fuse case 24 tightly into contact 7 thuslocking the plug in place.V

-4 It is to be particularly noted that when the fuse 1s blown, or for any reason requires attention, the fuse case' or plug is wholly removed from its inclosing casing, and away from all live connections. To 'substitute a new fuse case, all that is required is to release the screw 28 holding the old one to the handle, and connect the new one to said handle by the'same screw.

I claim:

1. A tubular casing, a cup-shaped contact and` an annular contact disposed within said casing, a cylindrical fuse plug received in and having external contacts cooperating with said casing Contacts, hooks 'on said casing, and a flange on said plug having 'in its edge circumferential recesses cooperating with said hooks upon the rotation of said plug to force the end of said plug into said cup-shaped contact;

2. casing having a tubular body portion and ltubular projections extending laterally therefrom, fixed contacts in said body portion, arms on said contacts extending into said projections, means in said projtctions Jor connecting said arms to circuit terminals, and a removable cylindrical fuse plug received in said body portion and having external contactsrcoperating with said fixed Y contacts.

3. A tubular casing, contacts therein, a

removable cylindrical fuserplug received in In testimony whereof I have aixed my said Casing sind having 'external contacts cosignature in presence 'of two Witnesses.

operating with said casing contacts, a flange on said plug abutting against the circumfer- THOMAS E MURRAY' 5 ential edge of said casing, and hooks on said lVitnesses:

casing engaging said ange and holding i GERT'RUDE T. PORTER, said casing and plug contacts in coperative MAY T. MCGARRY. ,f relation.