US3696296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for testing electrical equipment
Assignee: ABB Norden Holding AB
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Filing: 1970-09-21
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Granted: 1972-10-03
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Expires: 1990-09-21
Abstract
Abstract For testing electrical equipment, a test rig is provided with a number of contact boxes mounted in a frame. Each box contains a normally closed pair of contacts which are connected to apparatus to be tested. A test handle is provided with a number of pins adapted to be connected to testing equipment. The test pins can be inserted through openings in the front of the boxes to enter between the contacts, thus separating them and making a connection to the testing mechanism. An arrangement may also be provided by which the contacts of adjacent boxes can be connected to each other by the opening of the contacts.
Inventors
- 👤 Roland Nylen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:34
CPC Classifications
H; H01; H01R; H01R29/00; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/20; H01R31/00; H01R31/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
212 words
Means for testing electrical equipment, such as relay protection means and automatic equipment, which comprises a testrig (1) which is formed of a number of contact boxes (3) in a frame (2), each contact box containing a contact set which is normally closed and is included in the circuit of an element of the electrical equipment, and a test-handle (17,21) comprising a number of test pins corresponding to the number of contact boxes (3), each test pin being connected to a certain element of the means for testing electrical equipment and each test pin being positioned in the test-handle so that when the test-handle is inserted in the test-rig the pins effect a switching of the contact sets and connect the corresponding element in the electrical equipment to its element in the testing equipment, a switching piece (27), at least some of the contact boxes (3) being provided with through holes (26) for the switching piece (27) to be inserted to thereby provide a common conductor for two or more contact boxes situated adjacent to each other and which switching piece (27) is located so that, when a test pin (18) is inserted in the respective box, one of the spring contacts (11) in each contact set abuts the switching piece (27).
Claim 2
Dependent Claim
212 words
Means for testing electrical equipment, such as relay protection means and automatic equipment, which comprises a testrig (1) which is formed of a number of contact boxes (3) in a frame (2), each contact box containing a contact set which is normally closed and is included in the circuit of an element of the electrical equipment, and a test-handle (17,21) comprising a number of test pins corresponding to the number of contact boxes (3), each test pin being connected to a certain element of the means for testing electrical equipment and each test pin being positioned in the test-handle so that when the test-handle is inserted in the test-rig the pins effect a switching of the contact sets and connect the corresponding element in the electrical equipment to its element in the testing equipment, a switching piece (27), at least some of the contact boxes (3) being provided with through holes (26) for the switching piece (27) to be inserted to thereby provide a common conductor for two or more contact boxes situated adjacent to each other and which switching piece (27) is located so that, when a test pin (18) is inserted in the respective box, one of the spring contacts (11) in each contact set abuts the switching piece (27).
Claim 3
Dependent Claim
49 words
Means according to claim 1, in which a support (25) is arranged on the side of the contact set opposite the switching piece (27) so that the distance between the contact set and the support (25) is equal to the distance between the contact set and the switching piece.
Claim 4
Dependent Claim
86 words
Means according to claim 1, in which, in order to effect a by-pass connection of a current relay (23) when measuring on this relay, the conductor (29) to the relay is connected to the contact (11) in a contact set which can be brought into abutment with the switching piece (27) and the out-going conductor (30) of the relay is connected to a corresponding contact in an adjacent contact set, while the relay is connected over the two other contacts (10) in both the contact sets.
Claim 5
Dependent Claim
28 words
Means according to claim 1, in which in order to measure in a voltage circuit, the test-object (33) is connected in series with and between two contact sets.
Claim 6
Dependent Claim
68 words
Means according to claim 1, in which in order to by-pass connect an element in a conductor (39), the element is connected in series with a first contact set (10,11) while a point (40) on the conductor situated before said element (38) is connected to the contact (11) in a second contact set which, when the test pin is inserted, comes into contact with the switching piece (27).
Claim 7
Dependent Claim
26 words
Means according to claim 1, in which the test-handle comprises a holder (47) for the test pin (18) and a grip-handle 21 arranged on the holder.
Claim 8
Dependent Claim
28 words
Means according to claim 1, in which a test pin (18) comprises a central part (22) of insulating material and an outer edge layer (23) of conductive material.
Claim 9
Dependent Claim
17 words
MeaNs according to claim 7, in which there is a break (24) in the conducting edge layer.
Claim 10
Dependent Claim
15 words
Means according to claim 7, in which the break is situated on the test-pin side.
Claim 11
Dependent Claim
19 words
Means according to claim 7, in which the break is situated at the free end of the test pin.
Claim 12
Dependent Claim
25 words
Means according to claim 7, in which the test pin is provided with a longitudinal ridge 41 at the free end of the test pin.
Claim 13
Dependent Claim
61 words
In a means according to claim 1, a blocking contact in series with one of the members of one of the contact sets which is separated from the other member of the same set when the test pins are inserted, said switching piece being engaged with such other member when the test pins are inserted, whereby to bypass said blocking contact.
Claim 14
Dependent Claim
79 words
In a means according to claim 1, a circuit passing through one of said contact sets, a blocking contact in series in said circuit, the insertion of the pins breaking said circuit, the member of the said contact set and the member of the other contact set which abut the switching piece being connected in said circuit in bypass relation to the blocking contact whereby to close the circuit and bypass the blocking contact when the pins are inserted.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |