US 1870762 A
Description (OCR text may contain errors)
Aug. 9, 1932. c. WINTER PLUG-IN DEVICE Filed June 18. 1930 INVENTOR CARL WINTER ATTORNEY transformer windings.
Patented Aug. 9, 1932 UNITED STATES PATENT OFFICE CARL WINTER, 0F DBESDEN, GERMANY, ASSIGNOR T0 SIEMENS & HALSKE, AKTIENGE- SELLSCHAFT, OF SIEMENSSTADT, NEAR BERLIN, GERMANY, A CORPORATION OF GERMANY Application filed June 18, 1930, Serial No.
This invention relates broadly to an adjustable power plug-in device and more specifically to a plug having means for connecting a power source to optionally different Many arrangements which must be operated with a constant operating voltage require that the input terminals thereof be conveniently adapted to be connected to difi'erent line voltages or voltage variations of the line supply. If the input is through a transformer, the primary winding of the transformer will be provided with various taps.
The present invention is directed to a plug- 'in connecting device whereby the two plugs the present invention in the manner that the p may be connected in simple manner with the ends of difierent groups of windings leading to the plug'.
This is accomplished in accordance with connecting parts for the ends of the various circuit elements (windings 'or taps of windings) are disposed in one part of the plug device and the plugs for the connection with the current source in a second part which may be turned, relative to the first part, for the purpose of the selective change of the connection. The device is provided with a contact protection-housing on the order of .a collar plug. The invention will be better understood from a reading of the following specification in conjunction with the drawing in which,
Figure 1 shows an embodiment of my invention'when the plug is open; and, Figure 2 shows the plug closed. In the drawing, an insulating piece 1 has disposed therein the connecting points for the ends of the various circuit elements, pro- 0 vided on the one side with soldering clips 6 for connecting the windings while ending on the other side in sockets 5. A second insulator piece 2 contains the lugs 4 for providing connection with e current source. These plugs traverse the insulator plate and end on the other side likewise in two plugs 3. By means of a screw 8 disposed in the insulator part 2 engaging a corresponding) female thread 7 in the insulator part 1 0th parts 1 and 2 may be rigidly attached to one another. The connecting points for the difrrnd-rn DEVICE 461,882, and in Germany June 28, 1929.
ferent windingsare arranged in a circle in the manner that each two corresponding end by to insert the plugs 3 by twisting the parts 1 and 2 in the various sockets corresponding to one another. The plug device is surrounded by a housing 10 in order to prevent a con- 'tact of live parts. The relative position, corresponding to the different voltages, of the two parts 1 and 2 with respect to one another is marked by cuts 11 disposed in the collar 10 and by a pin 9 disposed, in part 1. The value of the voltage in-question is marked under the individual cuts. If the device is to be set for another voltage, screw 8 must be loosened so-far that the lugs 3 may be drawn out o? the sockets 5. 'l he part carrying the plugs is then twisted with respect to the other art so far until the pin 9 is disposed over the cut which belongs to the desired voltage. Subsequently the plu s 3 are again inserted in the sockets and held firmly in this position by the tightening of screw 8. Itis suitable to block the screw 8 in part 1 in such manner that it can be screwed out so far only that a twisting of the two parts with respect to of sets of terminals carried by sai base, a
set of cooperating contacts on said attaching member, said latter being adapted to selectively engage with any desired set of said terminals, a housing for said attaching member and means on said housing cooperating with means on said base for indicating an fixing the position of said attaching member contacts with respect to said terminals.
2. An electrical circuit selector plug-in device comprising, a base and an attaching member, a plurality of sets of terminals carried by said base, a set of cooperating contacts on said attaching member, said latter beingv adapted to selectively engage any desired set of said terminals, means for attaching said member to said base comprising a holding device adapted to maintain said base and said attaching member in fixed relation when said set of cooperating contacts are engaged with a set of said terminals and for maintaining said attaching member attached to said base while moving said set of terminals from one set of contacts to another.
3. An electrical circuit selector plug-in device comprising, a base and an attaching member, a plurality of sets of terminals carried by said base, a set of cooperating contacts on said attaching member, said latter bein adapted to selectively engage any desired set of terminals, a housing for said attaching member, and means on said housing cooperating with means on said base for indicating and fixing the position of said attaching member contacts with respect to said terminals, means for attaching said member to said base, comprising a holding device adapted to maintain said base and said attaching mem her in fixed relation when said set of coo erating contacts are engaged with one 0 said sets of terminals and for maintaining said attaching member attached to said base but permitting movement between them while moving said set of terminals from one set of contacts to another.
- CARL WINTER.