US973838A - Coil for electromagnets. - Google Patents

Description

C. ALBORG.

GOL FOR ELEGTROEAGNETS.

APPLGATIoN FILED JUNE 4, 1906.

ATTORNEY nuire scarse CHRISTIAN. AALBORG, (2F WILKINSBURG,

HOUSE ELECTRXC & MANUFACTURING COMPANY, A CORPORATION OFA PENNSYL- VANIA.,

PATENT PENNSYLVANIA; ASSIGNOB, TO wWESTING- COXL FOR ELECTROMAGNETS.

Application filed .Tune 4,

To ull whom it may concern:

Be it known that .L CHRISTIAN a citizen ot the lfnited States. and a resident of Vi'illtinsburg, in the county ot Allegheuy and State of Pennsylvania, have invented a new and uset'ul improvement in (oilsfor la'lect'romagncts` of which the fol lowingl is a specitieation.

My invention relates to magnetizing coils for electro-magnets and has special reference to such coils as are adapted for use with automatic circuit interrupters.

The object of my invention is to provide a simple and durable coil of the class above indicated which shall be adapted t'or use with a two-part or Ushaped core member, and the construction of which shall involve a minimum expenditure ot' labor and niaterial.

Circuit-breakers or siinila r devices intended t'or automatically interruptingelectric circuits traversed by relatively large current values, have usually been provided with magnet coils which were relatively e.\'- pensive and ditlicult to construct and which comprised a number of convolutions formed of large sized rods ot conducting' material bent into the desired shape.

.According to my present; invention` l provide a multi-path coil which may be readily constructed and which adapted tor use with a i-shaped magnetizable core.

Figure l ot the accompanying drawing is a side elevation of a circuit interruptcr embodying the magnet coil otl in v invention. the coil being,- further disclosed in de ail in 2 and 3.

lrterring to the drawings. a circuit interrupter lV is mounted upon an insulating slab 2 and comprises a stationary contact member 3, an overload release magnet l. a movable bridging contact;member o and an operating handle tl. The tripping magnet. 4 comprises a coil i' having ay contacty projection 8 which is adapted to bc engaged by the movable bridging contact member when the circuit iuterriniter is closed. l deem it unnecessary to t'urthcr describe the arrangeA nient ot' parts or the action ot the circuit iuterrupter since' they are well ltuown. and the coil mayber used with any suitable Vtorni oi iutcrrupter or tor other purposes.

The coil i shown assubsiantially re.c tangular in cross-section and as proviled Specification of Letters Patent.

AALnone,

Patented Oct. 25, 19H9. 1.9{36` Serial No. 320,149.

l with a series of cross webs 9 which connect i opposite sides and leave two similar recesses niaguetizable core ll are drawn when suliicient current traverses the coil. lu the center of one side -and above the point or" connection with the cross webs 5l. is located the projection S which extends in a line parallel to the axes ot' the coil. Vv'heu the circuit interrupter is closed` current is supplied from the stationary 'contact meanber 2% through the bridgingr contact member 5 to the projection S and the circuit is continued from this point, as hereinbefore explained. through the coil T to a tern'iinal projection 12. This projection is a continuation oli the cross web 9. which is farthest removed from the projection 8.

ln order to cause the current flowing' into the circuit to encircle and energize the magA l netizable core members. the casting may be transformed into a series ot' convolutions .by making lateral saw-cuts 13 between the webs 9 and diagonal saw-outs i4 across the ends which 'c'onnect the ends of the lateral sawcut above a given web en one side, with the y ends of a similar out on the opposite side I below the same web. I In coils which are adapted for use with l very large circuit-breakers,- it may be of advantage to core the slots or form them in feasting 'the coil instead of machining or I saw-cutting thc-rn.

When the completed coil is in use, the l electric current enters the projection S divides, passes through the upper portion on either side, returns through the upper web in a common path, again divides and l passes through the side section of the coil, I and so on until it finally 'passes through the terminal projection l2 from the lowest web. l A coil of this kind is well adapted For use l with relatively large values oit' electric curl rent. since there is no danger ot the adiaj cent eonvolutions beconnng overheated and l l l t l l l l l l l l displaced or moved into engagementr with each other.

lt is"y ot course, not essential that the slotted tubular shell. which constitutes the major portion ot the coil, should have the cross-sectional forni shown in the drawing. and, as regards this and other structural y lfeatures. it is to be understood that the det scriptive terms employed in the foregoing l it) into which the two legs of a UeshapedA specification and in the appended claimsare not to be construed as imposing limitations which are not demanded by the prior art.

claim as my invention:

l. A magnet coil comprising a tubular shell and a plurality ot webs extending through the shell from side to side, said shell having side slot-s between the ends of adjacent webs and diagonal slots joiningr the ends of each side slot with the ends of the next slot in the series at the opposite sident the shell.

2. A multi-path mag-net coil comprising a tubular shell of approximately rectangular cross-section and a plurality of webs extending through the shell from side to side, said shell having side slots between the ends of adjacent webs and diagonal slots between the ends of each side slot and a longitudinally offset slot at the opposite side of the shell to form paths ot connection between one endof each web and the opposite end of the next adjacent web.

3. A magnet coil comprising a tubular member having: substantially parallel cross webs through the center, lateral slots across the sides connected by the web and diagonal slots across the ends adjacent to the connected sides.

4. A mag-net coil comprising' a tubular member having substantially parallel cross webs through the center, lateral slots across the sides connected by the webs and diagonal slots at both ends which form two paths of connection between one end of each web and the opposite end of the next adjacent web.

5. A magnet coil comprising a tubular shell and a plurality of substantially parallel cross. webs extending through the shell from side to side, said shell having side slots between the ends ot' adjacent webs, diagonal slots in the sides adjacent to those connected by the webs and projections by which the coil is supported and electrically connected in circuit. l

G. A multi-path magnet coil comprising a tubular shell and parallel cross-webs connecting its opposite sides, said shell having side slots between the ends of adjacent webs, diagonal slots joining the ends of the side slots to form paths of connection between one end of each web and the opposite'end ot the next adjacent web, an integral contact projection at one end, and an integralk terminal projection at the opposite end.

7. A magnet coil of substantially rectangular contour having a plurality of internal cross pieces, slots between the ends of adjacent cross pieces and diagonal slots that connect thc ends of the first-named slots at one side with the ends of corresponding slots in different planes at. the other side.

n testimony whereof, l have hereunto subscribed my name this 24th day of May, 1906.

@HB1 STN ALBORG.

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