SU1582220A1 - Cut-in contact - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to increase the reliability of contact. The cut-in contact contains the blade contact (NK) 1, the jaws 2 of the fixed contact, elastic arcuate parts (UDD) 3, spring 4 and screw stop 5. When moving NK 1 acts on the spring 4, which transmits force to UDD 3. The latter press the jaws 2 to NC 1. 2 Il.

Description

one

(21) 4488058 / 24-07

(22) 09/28/88

(46) 07/30/90. Bup. Number 28

(71) Kharkov Institute of Public Utilities

(72) K.K.Namitokov, V.G.Brezinsky, Z.M.Frenkel and R.S. Khmelnitsky (53) 621.3.066.6 (088.8)

(56) USSR Copyright Certificate No. 13-5120, cl. H 01 H 1/42, 1959.

US Patent No. 3598949, cl. 200-166, 1971,

Nezhdanov V.T. Low voltage apparatus, part 1. M., ZINGI E and EP, 1961, p.234.

(54) CUT IN CONTACT (57) The invention relates to electrical engineering. The aim of the invention is to increase the reliability of contact. The nod contact includes a blade contact (NK) 1, a fixed contact jaw 2, elastic arcuate parts (UDD) 3, a spring 4 and a stop screw 5. When NK 1 moves, it acts on a spring 4 that transmits force on, UDC 3. The latter pressed the sponge 2 to the NC 1. 2 Il.

ate

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EE ISD

1

The invention relates to electrical engineering, in particular to contact systems of low-voltage apparatus, and can be used in flat fuses.

The purpose of the invention is to increase the reliability of contact.

Figure 1 shows the cut-in contact in the open position; Fig 2 is the same in the closed position

The cut-on contact contains a movable blade contact 1. The blade contact 1 enters between the fixed jaws 2 and is clamped between the nemir and the arcuate parts 3 connected by a Plane spring 4. The elastic arcuate parts 3 pass through the holes b of the fixed point; they can be rotated In these holes, in the plane of placement of the elastic arcuate parts 3, In the closed position of the contact, the spring 4 rests on the screw-stop 5 securing the fixed contact to the base of the smooth element,

Vrubny contact works as follows.

In the process of closing, the knife contact 1 is inserted between the jaws 2 of the fixed contact, first completely up to the stop, into the spring 4, which pushes the ends of the elastic arcuate parts 3 connected to it and rotates around the holes through which they pass and their free ends gradually they compress the jaws 2, as a result of which the compressive force increases until the spring 4 is fully straightened. A further slight bend of the spring 4 until it stops against the screw-clamp 5 somewhat weakens the squeezing force of the jaws 2 to almost simultaneously an ejection force countries blade contact one of the jaws 2 spring 4,

The proposed design does not exhaust the possible variants of the offered contact contact. In particular, instead of a flat spring, a coil spring can be used, instead of a screw, a spring can be used as an abutment limiting the spring bend after passing it through the position of maximum force on the arcuate elements, not the contact itself can serve as a holder of arcuate elements insert, etc.

The proposed cut-in contact provides reliable contact with constant pressing, since without the jaws being compressed by arcuate elements at a certain position of the moving contact, the latter will not be held at all by the jaws.

The application of the proposed cut-in contact in fuses is the most rational, but it can also be used in other devices (for example, in switches).

Claims (1)

Invention Formula The cut-in contact, which contains movable knife-contact, fixed contact in the form of jaws, into which the movable knife-contact enters, and a compressive jaw is an elastic arcuate element, characterized in that, in order to increase the reliability of contact, the elastic arcuate element is made in the form of two elastic parts connected spring located under the contact surface of the jaws inside the fixed contact and made with the possibility of exposure to the movable contact, l / 2