US1572211A - Electric-switch terminal - Google Patents

Electric-switch terminal Download PDF

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Publication number
US1572211A
US1572211A US473696A US47369621A US1572211A US 1572211 A US1572211 A US 1572211A US 473696 A US473696 A US 473696A US 47369621 A US47369621 A US 47369621A US 1572211 A US1572211 A US 1572211A
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United States
Prior art keywords
wire
terminal
screw
electric
head
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Expired - Lifetime
Application number
US473696A
Inventor
Henry E Leppert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumbull Electric Manufacturing Co
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Trumbull Electric Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trumbull Electric Manufacturing Co filed Critical Trumbull Electric Manufacturing Co
Priority to US473696A priority Critical patent/US1572211A/en
Application granted granted Critical
Publication of US1572211A publication Critical patent/US1572211A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/58Electric connections to or between contacts; Terminals
    • H01H1/5855Electric connections to or between contacts; Terminals characterised by the use of a wire clamping screw or nut

Description

Feb. 9 1926.
H. E. LEPPERT ELECTRIC SWITCH TERMINAL Filed May 31 1921 ayweutoz EZTZ t m 4 Patented Feb. 9, 1926.
UNITED STATES PATENT OFFICE.
HENRY E. LEPPERT, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE TRUMBULL ELECTRIC MFG. COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.
ELECTRIC-SWITCH TERMINAL.
Application filed May 31, 1921.
To all wlz om it may concern:
Be it known that I, I'IENRY E. LEPPERT, a citizen of the United States of America, residing at New Britain, Connecticut, have invented a new and useful Electric-Switch Terminal, of which the following is a speci iicution.
My invention relates particularly to the binding post or terminal construction. The main object is to provide a construction which may be readily wired and yet which will hold the end of the wire securely.
Another object is to provide a construction which will facilitate the severing or breaking off of the end of the wire in the operation of wiring.
Another object is to provide a terminal having no projecting lugs or wire retaining means.
In its preferred form the invention contemplates the use of what is commonly called a flat terminal for a switch.
Fig. l is a side view of a snap switch embodying the improvements of my invention and showing the cover in section.
' Fig. 2 is a fragmentar plan view of the switch base and termina on a larger scale.
Fig. 3 is a sectional view on a plane of the line 3-3 of Fig. 2.
Fig. 4 is a perspective view of one of the terminal improvements.
The switch mechanism may be of any suitable type, such for instance, as that shown in the Platt Patent #1,054,939. The base 5 supports a spindle 6 which carries the rotary contact member 7.
Each terminal member is conveniently formed of sheet metal, preferably with two lugs S and 9 threaded to receive the attaching screws 10 and 11 respectively. The blade portion 12 projects into the path of movement of the rotatable switch blade 7. The terminal plate is notched at 13 to allow for the passage of the wire 14.. A portion of the plate is depressed or grooved at 15 around the screw seat 16 so as to accommodate the wire beneath the head of the screw 17. The wall of this groove thus forms in effect a lug to prevent the wire from escaping from beneath the head of the binding screw as shown in Fig. 3. To facilitate the breaking off or severing of the end of the wire adjacent the head of the binding screw,
Serial No. 473,696.
I preferably provide a notch 18 at one edge, as shown in Fig. 4;.
To wire the terminal, the insulation is stripped from the end of the wire which is then passed through the base and the stripped end 14 is twisted partway around in the channel beneath the head of the screw 17 and then clamped in place by the screw. The stripped end of the wire ordinarily will be long enough so that a portion will project beyond the screw. This extended portion (not shown) can be readily bent back and forth in the notch 18 a few times until the wire breaks off short at the edge of the notch adjacent the head of the binding screw. This leaves a neat and finished job with no protruding wire and yet with the wire held securely in place.
One great advantage of wiring the switch in this simple manner is that the wire breaks ofi close to the edge of the plate and thus insures that there will be no projecting Wireends to prevent the cover from seating properly on the shoulder on the base member.
It is obvious that this terminal is cheaper to make than one having the usual projecting lugs or ears for securing the wire, and it is also obvious that the omission of such ears or lugs is an advantage because of the limited space.
I claim:
1. A switch terminal comprising a plate having anchorage lugs in one plane, a binding screw seat in a plane slightly offset therefrom providing circumferentlally extending wire retaining shoulders and a binding screw in said seat with its axis substantially at right angles to the plane of said lugs said shoulders being located around the periphery of the head of said screw, said plate having a wire breaking notch in its edge adjacent the edge of the head of said screw.
2. A switch terminal comprising a. plate having anchorage lugs in one plane, a binding screw seat in a plane slightly ofiset therefrom, a binding screw in said seat with its head in a plane substantially parallel to said lugs, and said plate having a wire breaking notch adjacent the edge of said seat and said binding screw.
3. An electrical terminal comprising a plate having a wire-retaining recess oif-set from the plane thereof and parallel there- 4 with, a binding screw having a head adapting notch located in the edge thereof and a ed to sent within said recess, said plate havshoulder adjacent to the periphery of the ing' a wire breaking notch adjacent to said head of said binding screw in position to l recess. permit a wire to be wound around beneath 4. An electric terminal comprising asheet the head of the screw and bent over and metal plate and a binding screw seated broken off in said notch. therein, the said plate having a wire break- HENRY E.-LEPPERT.
US473696A 1921-05-31 1921-05-31 Electric-switch terminal Expired - Lifetime US1572211A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496145A (en) * 1948-02-05 1950-01-31 Arrow Hart & Hegeman Electric Wire terminal mounting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496145A (en) * 1948-02-05 1950-01-31 Arrow Hart & Hegeman Electric Wire terminal mounting

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