US1682790A

US1682790A - Electrical contact

Info

Publication number: US1682790A
Application number: US11782A
Authority: US
Inventors: John T Janette
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-02-26
Filing date: 1925-02-26
Publication date: 1928-09-04
Anticipated expiration: 1945-09-04

Description

Sept. 4, 1928. 1,682,790 .1. T. JANETTE ELECTRICAL CONTACT Filed Feb. 26. 1925 22 25 /7 I /3 a /9 7 fi/ F19 E3. 6' 9 2,' 7 I I, i i

I) m M I 7 A3 /5 W 5 Patented Sept. 3, 1928.

UNITED STATES earner QFFECE.

JOHN T. JANETTE, OF CHTGAGO, ILLINOIS.

ELEGTRZCAL CONTACT.

Application filed February 26, 1325. Serial No. 11,782.

This invention relates to electri :al contacts which are adapted for use in various place, as for instance, in switches. controllers, relays, or other devices in which yielding contacts are desired. I

The objects of this invention are to pro vide a yielding contact which will be extremely simple and cheap in construction, but which will be durable and efi'icient in operation; to provide a yielding contact which may be formed from sheet metal; provide a yielding contact in which the pressure on the contact point will not be materially increased as the contact is made; to provide contact device having a resilient toggle oint pre s are arrangement; and to provide such other novel features of construction and advantages as will appear more fully hereinafter,

In the accompanying drawings illustrating this invention,

Figure 1 is an end view ofa controller showing my improved contact;

Figure 2 is a side view ot the same;

Figure 3 is an enlarged sectional view taken on the line, 3-3 of Figure 2;

Figure 4: is a sectional view taken on the line H of Figure 3; andv Figure 5 is a fractional side view illustratin? the method of assembling.

As shown in these drawings, the controller drum 6, which is provided with intacts 7, which coact with my improved contacts, illustrates one method or combination in which my improved contacts are adapted to he used. These contacts comprise a fixed or supporting member 8 and a movable memher 9, which is secured thereto in a novel manner, and is held by means of a spring 25. The fixed or relatively stationary member 8 comprises a strip of metal haven; a branch or arm 11, which tor convenience in description, may be considered as a horizontal portion and which is adapted to be secured to an insulating; base or support 12 by means of screws 13. 'llhe strip 8 has an upwardly extending branch 14 at one end which is approximately at llfflll" angles to the branch 11, and a rearwardly extending branch 15, which is at an obtuse angle to the branch 14, or bent backwardly as shown in Figures 3 and 5. Transverse grooves 16 are formed on each side of the branch 11 adjacent to its inner end. The sides of the branch 15 are cut away to provide a tonn ne 17 having; shoulders 18 at one end thereot.

The movable member 9 also comprises a strip of metal such as sheet brass, or the like.

and which will be a good conductor of elec tricit-y. This member has a substantially straight vertical portion or branch 19, which is bifurcated at the lower end to fitover the hump or projection 20 between the-grooves 16 and the lower edges are preferably sharpened, as shown at 21, so that they will engage with the grooves 'to make a joint or hearing for he movable member. The upper end of the movable member is bent outwardly to form a brush like or contact branch 22, which is adapted to makecontact with any suitable contact member such as the segment 7 on the controller 6. The portion 22 is bent outwardly a sufiicient distance to prevent arcingbetween the stationary member and the controller segment. 'The branch-19 has a hole 23 for receiving the tongue 17- which fits freely therein. The branch also has an integrally formed lip 24 for receiving one end of the spring 25, the other end of the spring abutting against the end of the branch 17. The spring 25 is preferably made of sheet spring metal and is bent to an approximately U-shape or horseshoe form, as clearly shown in the drawings. The upper end of this spring has a slot 26 "for receiving the tongue 17, and the end 27'of this tongue is bent over the end of the spring for fastening the'parts together. 4

When the device is to be assembled, the stationary member 8 and the movable member 9 are brought together as shown in Figure 5, and the spring 25 is placed in position as shown, with its. upper end embracing the tongue 17. The end 2? of the tongue is then bent over the end of the spring, as shown in v dotted lines in Figure 5, and thereupon, all of the parts will be securely locked together.

When the parts are thus assembled, it

would be seen that the expansive action of the spring tends to press the movable member 9 against the shoulders 18 or to normal position.

the lower end of the toggle being the pivot 21, the center or joint being the lip 24, and the upper end at the hook or abutment 27. When the outer or contact end 22 of the movable member is engaged by a coacting contact, as for instance the segment- 7 on the drum 6, it will be swung; backwardly so that the toggle action tends to compress the spring 25. However, as the center of the toggle or the point 24 approaches the line between the The spring together with the lower end of the movable'member form a toggle,

ends of the toggle, the pressure required on the end of the arm or lever 9 for compressing v suitable contact Without having an increase in pressure as is customary Where an ordinary spring is used to provide the necessary pressure between the contacts. In other WOIdS, Where an ordinary compressing spring is used, the continued pressure usually requires greater force, Whereas in the pres ent device, the proper movement is provided without requiring extra force tor compressing this sprin My improved contact device may be made in various sizes and shapes in order to adapt it for the different uses above suggested and for this reason I do not Wish to be limited to the exact arrangement or details of construction herein shown and described, except as specified in therf-ollowing claims, in which I claim: 7

1. An electrical contact device comprising a fixed member, .a movable contact arm pivotally mounted on the fixed member, and a spring pressed toggle joint between the two members.

2. An electrical contact device {comprising a fixed member, a cont-act arm pivoted to the fixed member, and a compression spring terposed between the movable member and the fixed member and torn-ling a toggle with a portion of the movable member.

3. A contact device comprising a strip of metal having a rea-rWa-rdly bent portion at one end, said portion being cut away at the sides to form a central tongue, said strip also having grooves in the surface thereof with a PIQZtBCt-IOI-l between the same, a movable member having a bifurcated lower end engaging With said grooves and havlng a slot tor receiving the tongue, said movable member havoer surface thereof a movable member comprising an arm having a bifurcated lower end engaging with said grooves to form a pivot, and having a hole for receiving the tongue, saidarm also having an outwardly projecting contact portion, a lip formed tegrally With the movable member adjacent to the pivot, a sl-ibstantially U-shaped spring formed of sheet metal, having one end engaging with said lip and having a slot in the opposite end for engagement with the tongue, the end of the tongue being bent over the adjacent portion of the spring when the parts are assembled, in order to lock the par-ts together.

5. A contact device as per claim 1, having a yielding toggle coacting with the movable member and arranged so that as the movable member is swung from normal position, the arms-of the toggle Will be moved toward their central position, whereby the force necessary to move the movable member Will belessened.

, JOHN T JANETTE.