US1103994A - Electric cut-out. - Google Patents

Electric cut-out. Download PDF

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Publication number
US1103994A
US1103994A US80877613A US1913808776A US1103994A US 1103994 A US1103994 A US 1103994A US 80877613 A US80877613 A US 80877613A US 1913808776 A US1913808776 A US 1913808776A US 1103994 A US1103994 A US 1103994A
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United States
Prior art keywords
plug
neutral
terminals
plugs
fuse
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Expired - Lifetime
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US80877613A
Inventor
Thomas E Murray
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Individual
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Individual
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Priority to US80877613A priority Critical patent/US1103994A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof

Definitions

  • Figure 1 is a plan view of my cut-out, showing the neutral and positive plugs-removed.
  • Fig. 2 is a section on the line 2, 2 of Fig. 1.
  • Fig. 3 is a section on the line 3, 3 of Fig. 1.
  • Fig. 4 is a top view'of the neutral fuse plug.
  • A.V is the base, preferably of insulating refractory material,- such as porcelain, and
  • the fuse plugs O, P which connect the terminals of the positive and negative leads are of well known form.
  • Each has a body portion Q, of porcelain arched on its upper side and provided on its lower side with pro-.
  • the neutral plug U has an elongated projectio'n V on its lower side, to, which is secured a metal plate W having two ⁇ downwardly turned wing portions X which cooperate with the clipsL, M in channel K. Then plug -U is in place, as shown in Fig. 3, circuit is established through plate W between the terminals of the neutral lead.
  • An electric cut-out comprising a base having sockets and circuit terminals of the positive and negative leads of a-threewire system therein, fuse' plugs entering said sockets and coperating with said terminals to close circuit in each lead, neutral terminals disposed in a channel in said4 base, a plug entering said channel, a bridge bar on said plugcoperating with said terminals to close circuit in said neutral lead,
  • An electric cut-out comprising a base having sockets and circuit terminals of the positive and negative leads of la three-wire system therein, fuse plugs entering said sockets and coperating with said terminals to close circuit ip each lead, neutral termi-v, nals disposed in a channel in said base.; a plug entering said channel, a bridge bar on said pfug' coperating with said termil l nals to close circuit in said neutral lead, In testirlnony whereof I havealxed my A lateral projections on said plug adapted to signature 1nA presence of two witnesseses. enter recesses inythe upper surface of said base, and lateral projections on said posi- THOMAS E' MURRAY' 5 tive and negative fuse plugs extending over l llitnesses:

Description

T. E..MURRAY.
AELECTRIC) GUTOUT.
APPLICATION FILED DB0. 26, 191s.
Patented July 21, 1914.
THoMAs'E. MURRAY, or NEW YORK, N. Y.
ELECTRIC CUT-OUT.
Specification of Letters Patent.
Patented July 21, 1914.
Application tiled December 26, 1913. Serial No. 808,?76.
To all whom/tt may concern:
Be it known that I, .THOMAS E. MURRAY,
a citizen of the United States, residing at signed for threewire-systems, and consists in the constructioi'i hereinafter set forth,
l whereby the plug for closing circuit between the terminals of the neutral lead is locked in position by the fuse plugs closing circuit respectively between the terminals of the positive and negative leads, so that said neutral plug cannot be removed from the base unlessl t-he fuse plugs are rstl taken out.
In the accompanying drawings-Figure 1 is a plan view of my cut-out, showing the neutral and positive plugs-removed. Fig.
2 is a section on the line 2, 2 of Fig. 1. Fig. 3 is a section on the line 3, 3 of Fig. 1. Fig. 4 is a top view'of the neutral fuse plug.
Similar letters of reference indicate like parts.
A.V is the base, preferably of insulating refractory material,- such as porcelain, and
having two sockets C, D, in each of which. is a metal contact clip E, F. To the clips E, F are connected the terminals of the posi tive lead of a three-wire system, preferably in the manner shown at G, Fig. 1. Two similar, sockets H, I (H not shown). are provided, with similar clips J, to which are connected the terminals of the negativelead of said system. Between the sockets E, F and H, I is a channel K, in which are contact clips L, M, to which, are attached the terminals of the neutral lead, as shown in Fig. ,3. Between'the clips L, M. is a movable barrier N of insulating material.
The fuse plugs O, P which connect the terminals of the positive and negative leads are of well known form. Each has a body portion Q, of porcelain arched on its upper side and provided on its lower side with pro-.
jections It,
lwith the clips'J in said sockets, thus closing the fuse and between the-U circuit through.
terminals of the positive lead. When the fuse plug P is inserted in the sockets C, I), the contact plates S coperate with the clips E, F in said sockets, thus closing circuit through thel fuse and between the terminals of t-he negative lead.
The neutral plug U has an elongated projectio'n V on its lower side, to, which is secured a metal plate W having two` downwardly turned wing portions X which cooperate with the clipsL, M in channel K. Then plug -U is in place, as shown in Fig. 3, circuit is established through plate W between the terminals of the neutral lead.
In order to prevent the removal of the neutral plug U from the base before the fuse plugs O, P are removed, I form on each side of plug U lateral project-ions, a, Fig. 4, which are received in recesses b inithe up-l per surface of said base. 'I also provide on each sidevof each fuse plug a lateral projection c. The neutral plug U being put in place, the projections a cn said plug are received in and fill the recesses b. The fuse plugs O, P then being inserted, their projections c lap over the projections b of plug U, and t-hus prevent the removal of `said plugs U until after plugs O, P have been taken out.
I claim:
1. An electric cut-out, comprising a base having sockets and circuit terminals of the positive and negative leads of a-threewire system therein, fuse' plugs entering said sockets and coperating with said terminals to close circuit in each lead, neutral terminals disposed in a channel in said4 base, a plug entering said channel, a bridge bar on said plugcoperating with said terminals to close circuit in said neutral lead,
-and means on said positive and negative fuse plugs for engaging said neutral plug after the same has been seated in said base and preventing the removal of said neutral pluguntil said positive and negative-plugs shall first have been removed.
2. An electric cut-out, comprising a base having sockets and circuit terminals of the positive and negative leads of la three-wire system therein, fuse plugs entering said sockets and coperating with said terminals to close circuit ip each lead, neutral termi-v, nals disposed in a channel in said base.; a plug entering said channel, a bridge bar on said pfug' coperating with said termil l nals to close circuit in said neutral lead, In testirlnony whereof I havealxed my A lateral projections on said plug adapted to signature 1nA presence of two Witnesses. enter recesses inythe upper surface of said base, and lateral projections on said posi- THOMAS E' MURRAY' 5 tive and negative fuse plugs extending over l llitnesses:
said neutral plug projections when said GERTRUDE T. -PORTER5 plugs are seated in fsaid base. MAY T. MCGARRY.
Copies o! this patent may he obtained for v cents each, by addressing the Commissioner `of Patents.
Washington, I). C.
US80877613A 1913-12-26 1913-12-26 Electric cut-out. Expired - Lifetime US1103994A (en)

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US80877613A US1103994A (en) 1913-12-26 1913-12-26 Electric cut-out.

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US80877613A US1103994A (en) 1913-12-26 1913-12-26 Electric cut-out.

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