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Position switch with movable contacts having positive operation

A technology for moving contacts and operating devices, applied in electrical switches, snap-action devices, contact drive mechanisms, etc., can solve the problems of high switch failure probability and resistance value, large opening mechanism size, increased cost and volume, etc. The effect of small size and cost

Active Publication Date: 2012-07-25
PIZZATO ELETTRICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, this solution has such a high probability of switch failure and resistance value that once a high current passes through, a relatively high adhesion between the contacts occurs
The above-mentioned drawbacks make the opening mechanism oversized, leading to an overall increase in the cost and volume of the entire device

Method used

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  • Position switch with movable contacts having positive operation
  • Position switch with movable contacts having positive operation
  • Position switch with movable contacts having positive operation

Examples

Experimental program
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Embodiment Construction

[0036] Referring to the above figures, a position switch, generally indicated by numeral 1, with a moving contact with positive direction operation switches the supply current automatically from the main shut-off circuit of the machine or system to the auxiliary signal circuit.

[0037] The switch can be used to control the shutdown of automatic or semi-automatic machines or systems, in particular for the detection of end positions.

[0038] Such as figure 1 Shown, the position switch of the present invention has: the common input terminal 2 that is connected to the voltage source known per se not shown; The main shut-off circuit and auxiliary signal circuit of the machine or system shown; the first pair of static contacts 5 and the second pair of static contacts 6, which are electrically connected to the first and second output terminals 3 and 4 respectively; a pair of moving Contacts 7 , which are electrically connected to the common input terminal 2 and are capable of inte...

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PUM

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Abstract

A position switch with movable contacts having positive operation is designed for cutting off a supply current from a primary shut-down circuit to an auxiliary signaling circuit of a machine or system. The switch has a common input terminal (2) connected to a voltage source, first and second output terminals (3, 4),connectable to a primary shut-down circuit and an auxiliary signaling circuit of amachine or system respectively, first (5) and second pairs (6) of stationary contacts in electrical connection with the first (3) and second (4) output terminals respectively, a pair of movable contacts (7) in electrical connection with the common input terminal (2) and designed for alternately interacting with the stationary contacts of the first (5) and second pairs (6) respectively. The pair of movable contacts (7) is normally in contact with the first pair of stationary contacts (5). Means (8) are provided for positive operation of the pair of movable contacts (7) to cause them to move apart from the first pair of stationary contacts (5) thereby causing positive opening of the primary circuit and simultaneous closing of the auxiliary circuit.

Description

technical field [0001] The invention has general application in the field of basic electronics, and in particular it relates to position switches with moving contacts with positive direction operation. [0002] The switch is used in particular for the safety control of moving parts of machines and systems and for shutting them down when end positions are detected. Background technique [0003] Position switches are known for positioning, controlling and checking moving parts of automatic machines and systems, for example in end position detection to cause a safe automatic shutdown. [0004] These switches have a mechanical actuator for switching from a main shut-off circuit, which is closed causing the machine or system to start, to an auxiliary signal circuit, which is closed to stop the machine or system. Switching is effected by moving one or more movable contacts from their first position engaging the stationary contacts of the main circuit to their second position enga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H13/18H01H13/28H01H5/06
CPCH01H3/001H01H13/18H01H13/32H01H3/40
Inventor M·皮扎托B·皮扎托
Owner PIZZATO ELETTRICA