Electricity: electrical systems and devices – Polarity reversing
Patent
1989-03-08
1990-08-07
Paschall, M. H.
Electricity: electrical systems and devices
Polarity reversing
318256, 318300, 335426, 335136, 335159, 335162, H02J 100, H01H 500
Patent
active
049472852
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention refers to a reversing circuit for direction reversal in the case of direct current drives.
2. Description of the Prior Art
German-Offenlegungssohrift 24 18 930 discloses a direct current operated, electromagnetic reversing circuit comprising two oppositely controlled switches which are constructed as switchover contactors and which are each provided with two-pole contact bridges, it being selectively possible to establish a connection between the two-pole contact bridges and outer terminals of the reversing circuit via fixed contacts and between the two-pole contact bridges and additional outer terminals. This known reversing circuit with switch-over contactors has a comparatively complicated structure and requires much space and in view of the use of normally closed contacts. For the purpose of conducting and switching the full electric power, it is also limited with regard to its switching power and its service life.
German-pat 525 108 refers to a U-shaped supporting bar for a plurality of relays, said supporting bar being formed in one piece together with the relay yoke and the relay core member.
SUMMARY OF THE INVENTION
In comparison with this prior art, the present invention is based on the task of further developing a reversing circuit of the type mentioned at the beginning in such a way that an efficient and long-lived switching contact making is achieved on the basis of a structural design of the reversing circuit saving space and material.
The reversing circuit according to the invention uses exclusively normally open contacts for the purpose of contact making so that high powers can be switched and a long service life of the contacts is obtained. The arrangement of the single-pole contactors in connection with the adequate arrangement oF the contact pieces permits a very space-saving mode of arrangement of the outer terminals and of the fixed contacts and avoids the use of bus bars for interconnecting the terminals and the fixed contacts.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
One preferred embodiment will be explained in detail hereinbelow while making reference to the drawing enclosed, in which:
FIG. 1 shows a top view of the reversing circuit according to the invention;
FIG. 2 shows a cross-sectional view taken along line 2--2 of FIG. 3 the reversing circuit according to the invention; and
FIG. 3 shows a side view taken along line 3--3 of FIG. 1 of the reversing circuit according to the invention.
The reversing circuit, a top view of the contact side of which is shown in FIG. 1, is provided with four single-pole contactors V.sub.1, V.sub.2, R.sub.1, R.sub.2, which are arranged in a square. Each of the contactors V.sub.1, V.sub.2, R.sub.1, R.sub.2 is provided with a coil 1 moving contact bridges 2 via plunger-type armature magnets. Two of the single-pole contactors V.sub.1, V.sub.2 serve to effect forward passage by means of a direct current drive (not shown) adapted to be connected to a direct current source via the single-pole contactors, whereas two other single-pole contactors R.sub.1, R.sub.2 serve to effect reverse passage by means of the direct current drive.
Each pair of the coils 1, which are arranged in a square. has provided between them one contact piece 3. Hence, the four contact pieces 3 are also arranged in a square. Each of said contact pieces 3 has a shape corresponding essentially to the shape of a right-angled, isosceles triangle. Acute-angled corners 4, 5 of the isosceles triangular contact pieces are cut off perpendicularly to the legs 6, 7 of said contact pieces. Bolts 8 for the outer terminals are arranged in the riqht-angled corners of the triangular contact pieces 3. Two of the bolts 8, which are arranged in opposite relationship with each other, are connected to the direct current source (not shown). The two other bolts 8 are connected to a direct current drive (which is not shown either). The contact pieces 3 carry fixed contacts at their cut-off, acute-angled corners 4, 5, said fixed
REFERENCES:
patent: 427237 (1890-05-01), Kissell
patent: 1847081 (1932-03-01), Cook
patent: 2821639 (1958-01-01), Bright et al.
patent: 3264529 (1966-08-01), Lowry
patent: 3694715 (1972-09-01), Van Der Linde et al.
patent: 3815060 (1974-06-01), Turnbull
patent: 4048600 (1977-09-01), Dietrich
Osborn David
Paschall M. H.
Schaltbau Gesellschaft mbH
LandOfFree
Reversing circuit for direction reversal in direct current drive does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reversing circuit for direction reversal in direct current drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reversing circuit for direction reversal in direct current drive will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-964467