US1876514A

US1876514A - brack

Info

Publication number: US1876514A
Authority: US
Publication date: 1932-09-06
Anticipated expiration: 1949-09-06

Description

" Sept. 6, 1932; l.. s. BRACH LIGHTNING ARRESTER Filed My 11, 192e LEON 5. BRHCH A TTOHNE Y Patented Sept. 6, 1932 f UNITEDSTATES PATENT OFFICE LEON S. BEACH, l' y.':LAS'JI ORANGE, NEW JERSEY, ASSIGNOB, BYLIESNE ASSIGNMENTS, n v 'TO GENERAL RAILWAY SIGNAL COMPANY n LIGHTNING .annnsrnn Application led lay 11, 1928. Serial No. 277,008.

cated. Associated with the stud 5, is a spaci This` invention `relates to a 1i htning arrester which is particularly adapte foruse in connection with signal circuits used by railways. y

In s uch systems, it is old and common practice to connect between what is generally referred to as the line wire and the instrument, a choke coil, at the same time providing a spark gap` from the terminals to which the choke coil is connected, to ground. Furthermore, it is customary to provide additional terminals on vthe arrester to which each of the rails are connected, the spark gaps being suitably vassociated with these terminals, whereby electrical char es on the rails which are insulated, may be issipated.

It is the object of my present invention to provide la. new and more efficient arrangement in an arrester for performing `these functions. Other `ancillary objects will be clear to one skilled in this art after a study of the specification taken in connection with the annexed drawing, wherein:

Figure 1 is a plan view looking down on 'the ltop of the arrester with the protecting cover line 3--3 e ure 2 with certain parts removed.

.eso

vFigure 5 is a fragmentary view of one of the spark gap plates. s

Figure 6 is a .view on the line 6-6 of Figure.

In the drawing, in which the same numbers refer to correspondingl parts in the various views, 1 is a base mem er of suitable insulating material, such asy porcelain. Holes 2 are rovided for mounting the base on any suita- Ele support. Base 1 has a top recess 3 and a bottom recess 4. A row of terminal studs 5 to 9 inclusive, is carried `in alignment by the base 1. vTo the end terminals 5 and 9are connected the extremities lof a choke coil 10, one extremity 11 ,being shown in Figure 4. The

- end 11 of the wire included in the construction of the chokeV coil extends through a passageway and is bent around ,the studA 5i as indiing washer 12 and a lock nut 13 is provided to securelyk anchor the terminal wire 11 against the boss 14.

Positioned between the boss 14 and the spacing washer 12, is a lug 15 comprising part of an arrester plate 16,. The arrester plate 16 rests edgewise in a horizontal groove opening into thetop recess 3.y At points adjacent the studs 6, 7, and 8, the arrester plate is provided with bent-over portions 17 that are constructed with a plurality of serrations 18 which serve as spark gaps cooperating with spark gap members 19 that are associated with the terminals 6, 7, and 8. The spark gap; members 19 are preferably of some hard refractory conductingl material such as carbon or carborundum. y

Preferably, there is associated with these spark gap members 19, metal collars 20 which are slightly longer than the thickness of the members 19, so as toy take the clamping strain of the nuts 13 and washers 21. ,f

As will be seen from Figure 1, there are two of the spark gap plates 16 used-*one on. each side of the row of terminals and extending into cooperative relationship with all of the terminals, except the-one at .the opposite end to which the Lspark gap plate is attached. e

It also will be seen from Figure 1, that the top recess 3 is formed by a rim 22. Fitting within the rim 22, as is more clearly seen in Figure A2, is a cover plate 23 which closes the recess and prevents dirt and moisture, etc., from collecting therein. This cover plate is of any. suitable material, preferably mica. The conductors leading to the terminals are adapted to be clamped between the clamping nuts 24.

v As shown, the line and instrument wires may be connected to either

terminals

5 or 9, the ground wire to terminal 7, and the rail wires to the terminals 6 and 8. Since the choke coil is inserted between the line and instrument terminals of the arrester, a very satisfactory arrester is obtained when only one spark plate is used. Under this condition, the spark plate is connected to the'y line terminal post and if desired, may extend into` spark gap relationship with the instrument terminal post. In either arrangement, the operation of the arrester is substantially the same.

Having thus described my invention, what I claim is:

l. A lightning arrestercomprising; a base of insulating material having a recess, a choke coil located in said recess, a plurality of terminals mounted in 'a single row Aon said base, said choke coil being connected between the end terminals, plates carried in edgewise position by the base on opposite sides of a majority of the terminals and having bentover portions extending toward said terminals Aforming spark gaps therewith, said plate being connected one to each of said end terminals.

2. A lightning arrester comprising; a base of insulating material having a recess, a choke coil located in said recess, a plurality of terminals mounted in a single row on said base, said choke coil being connected between the end terminals, said base having parallel grooves therein on opposite sides of said row of terminals, plates positioned edgewise in said grooves, one plate being connected to one of the end terminals and the other plate to the other end terminal, said plates extending along the grooves and having discharge portions arranged in spark operative position with respect to all terminals, except that terminal to which it is connected and the other end terminal.

3. A lightning arrester comprising; a base of insulating material having a recess, a choke coil located in said recess, a plurality of terminals mounted in a single row on said base, said choke coil being connected between the end terminals, said base having parallel grooves therein on opposite sides of said row of terminals, plates positioned edgewise in said grooves, one plate being connected to one of the end terminals and the other plate to the other end terminal, said plates extending along the grooves to at least a point opposite the centrally located-terminal and having discharge portions arranged in spark operative position with respect to the centrally located terminal and any other terminal between said centrally located terminal and the terminal to which the plate is connected.

ll. A lightning arrester comprising; a base of insulating material having top and bottom Y having parts extending into the top recess at least adjacent the other terminals, except the end ones, to form spark gaps therewith and VLtr/e514 ing into the top recess, plates positioned edgewise in said grooves, one plate being connected to one Vof the end -terminals and the other plate to the other end terminal, said plates Aextending along the grooves and having discharge portions arranged in spark operative position with respect to at least two other terminals, except the end terminals, and a protecting cover of suitable insulating material fitting on said base over the terminals to close said top recess.

6. A lightning arrester comprising; a base of insulating material having top and bottom recesses, a choke coil located in the bottom recess, said top recess having a row of bosses arranged therein but spaced from the side walls of the recess, terminals extending upward from said bosses above the plane of said side walls, said choke coil being connected between the end terminals, said base having a pair of grooves arranged one on each side of said row of bosses, washers of refractory conducting material associated with the terminals located between the end terminals, a plate positioned in each groove and connected one to each end terminal and having parts arranged and positioned to form spark gaps with said washers and a protecting cover of suitable insulating material fitting on said base over the terminals to close said top recess.

7. A lightning arrester comprising; a base of insulating material having top and bottom recesses, a choke coil located in the bottom recess, a single row of terminals extending upward from the top recess, said choke coil being connected between the end terminals, means located within the top recess for forming spark gaps on opposite sides of those terminals located between the end terminals, said means being plural and connected one to each of the end terminals and a protecting cover of suitable insulating material fittin on said base over the terminals to close said top recess.

8. A lightning arrester comprising; a base of insulating material having a recess, a choke coil located in said recess, a plurality of terminals mounted on said base in a single row, said choke coil being connected between two of said terminals, at least one spark gap plate carried by the base in edgewise position and .having a lug turned over and connected to a terminal to which one end of the choke,

coil is connected, said plate having bent-over portions formin sparkk gaps wlth the remainin termina s of the arrester.

9. A ightning arrester comprising; a base of insulating material having a recess, a choke coil located in said recess, a single row consisting of more than three terminals mounted on said base, said choke coil being connected between two of said terminals, at lo least one spark gap plate carried by the base in edgewise position and having a lug turned over and connected to a terminal to which one end of the choke coil is connected, said plate having bent-over portions forming spark gaps with the major number of the remaining termin als.

10. A lightning arrester comprising; a base of insulating material having a recess, a choke coil located in said recess, a plurality of terminals mounted on said base in a single row, said choke coil being connected between two of said terminals, at least one spark gap plate carried by the base in edgewise position and having a lug turned over and con- 25, nected to a terminal to which one end of thel choke coil is connected, said plate having bent-over portions forming spark gaps with at least two other of said terminals.

, In testimony whereof, I aix m signature. LEON S. RACH.