US1748881A - Switch - Google Patents

Description

Patented Feb. 25, 1930 v ISAMU INABA, F MUKOGUN, HUGO-KEN, JAI'AN SWITCH Application filed May 9, 1928. Serial N'o. 276,463.

This invention relates to improvements in switches and more particularly push-button switches adapted for usein lamp sockets and other electric instruments, and has for its ob-- ject to provide a push-button switch indi cating its opening and closing by length of the push-button'extending outwardly through the body of the switch. 7

An embodiment of the invention is illustrated by way of example in the accompanying drawings in which Fig. 1 is an elevational view of the switch. Fig. 2 is a sectional view taken along the line II of Fig.1.

Referring to the drawings, the body 1 of the switch is of an insulating material and carries a contact member 2, preferably of a blade clip form, and other contact member 3 having a spring contact piece 4 of U-shape. The metallic contact lever 6, substantially of L-shape, is mounted on a pivot pin 5 on the body 1. The one arm of said contact lever is formed at one end with a contact plate 7, preferably of a switch blade form, adapted to engage with the contact member 2, and is also formed above the pivot 5 with a projection '8, substantially of V-shape in outline. The other arm is formed at one end with a detent 9. The contact lever 6 permanently engages at its back with the spring contact piece 4, so as to make an electric connection and at the same time to prevent free movement ofsaid lever. The push-button 10 of suitable insulating material carries a push-bar 11, preferably ofsomewhat flexible character, and a detent bar 12, and is supported on' a plate 13 attached to the body .1 through means of a coil spring 14. The push-bar 11 internally extends towards the p1vot 5, so that the contact lever 6 may be turned on the pivot 5 in .either direction on pushingeither side of the peak of the projection 8 by said push-bar on pushing the push-button 10 against the spring 14. The detent bar 12 internally extendsand is'adapted to engage at the inner end with the detent 90f the contact lever 6 and hold the push-button 10 in halfway of its return due to. the spring 14, after the switch has closed on pushing said push-button. As will 50 be seen, the switch illustrated in Fig. 1 is shown as being closed, the contact plate 70f the contact lever 6 being in engagement with the contact member 2. In'this case, the pushbutton 10 is held in half-way of its return, the detent bar 12 being in engagement with 55, the detent 9, and the peak of the projection 8 of the contact lever 6 is deviated slightly to-' wards left-hand from the push-bar 11 and the pivot 5 of said contact lever. On account of shortness of the length of the push-button extending out of the body 1, it-will be noted that the switch is closed. If the push-button is pushed, the push-bar ll will act to push the contact lever 6 at right'side of the peak of the projection 8 and accordingly at right side of the pivot 5 and cause said contact lever to be turned-in-clockwise direction on said pivot to disengage the contact plate 7 with the contact member 2, so that the switch will be cut ofi, as'showli at dotted line. In this case, the push-button 10 will fully return on account of the spring 14, the detent bar 12' being in disengagement with the detent 9, to fully extend its length out of the body 1,

so that it will be noted that the switch is now cut 011?.

When the switch is opened, the peak of the projection 8 of the contact lever 6 is slightly deviated towards right-hand fromthe pushbar 11 and'the pivot 5 of said contact lever, so as shown at dotted line in Fig. 1. If the pushbutton 10 is pushed, the switchwill be closed, as seen from the above illustration, said pushbutton being held in halfway of its return to indicate that the switch is closed.

Having now particularly described and ascertained the nature of my said invention and in what manner thesame is to be performed, I declare that what I claim is:

1. A switch of the character described, comprising a spring-supported push-button, switching means actuated by means of said push-button and means for holding said pushbutton in half-way of its return due to ten sion of the spring when the switch is closed. 95

2. A switch of the character described, comprising a spring-supported push-button provided with a push-bar and detent bar, a pivoted contact lever, substantially of L- shape, adapted to be turned'on or turned off to or from a contact member, one arm being provided with a contact plate and projection and other arm being provided with a detent,

means of preventing free movement of said contact lever and means for holding said push-button in half-Way of its return due to tension of the spring when the switch is closed.

' 3. A switch as described in claim 2, in which said push-bar and contact lever are arranged in such a manner that when the switch is closed or opened the peak of the projection of said contact lever is slightly deviated towards left-hand or right-hand re spectively from said push bar and the pivot of said lever, so that said contact lever may be turned in either direction-to turn on or turn off the switch.

-4. A switch as described in claim 1, in which the said push bar and a contact lever are arranged in such a manner that when the switch is closed or opened the peak of the projection of said contact lever isslightly deviated towards left-hand or right-hand respectively from said push bar and the pivot of said lever, so that said contact lever may be turned in either direction to turn on or turn off the switch.-

In testimony whereof I have signed my name to this application.

ISAMU INABA.

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