US1227326A - Electric time-switch. - Google Patents

Description

G. E. SCHINDLER.

ELECTRIC TIME SWITCH. APPLICATION man AuG.,1916.

1,227,326. Patented May 22,1917.

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ELECTRIC TIME SWITCH.

APPLICATION FILED Aue.9. I9Is.

1,227,826. PaIenIed May22,1917.

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GEORGE E. vSCIIhlDlllllilBl, OF ASHLAND, WISCONSIN.

ELECTRIC TIME-SWITCH.

Specicaton of Letters Patent.

Patented May 22, 1917.

Application iled August 9, 1916. Serial No. 114,081.

To all 'folto/a 'it 111mg/ concor/1L.'

Be it lkrnown that I, GEORGE E. SGHINDLER, a citizen of the United States, residing at Ashland, in the county of Ashland and State of "Wisconsin, have invented new and useful Improvements in Electric Time-Switches, of which the following is a speciiication.'

This invention relates to a time switch for electric circuits and has for its primary object to provide a device of the character set forth by 'which a change in time can be accurately accomplished and at the same time insure a goed electrical connection.

An object of the invention is to construct a time switch of very few parts in which certain elements can assume various positions corresponding to different periods of time.

Another object of the invention is the novel manner of constructing a track so that the contact elements may be renewed when the same has reached a stage when good electrical contact is not accomplished.

A further object of the invention is to provide a time switch in which the movable elements are so associated as to minimize the resistance to the flow of current.

With these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully (described, illustrated in the accompanying drawings and lcasing and has secured thereto one end of an arm 4. Supported by the casing concentrically of the shaft 8 is an inner track 5 and an outer track 6 each formed with a T- shaped slot 7. The tracks are similar in construction with the exception that the outer track 6 is parted at the points 8 and 9 and the section thus formed is held in place by means of springs 11. A plurality of movable contacts 12 are arranged in the slot 7 of the outer track, the combined length of which being equal to the interval of time that the switch is to allow the passage of current. A

The arm 4E has secured thereto, a wiper 13 adapted to wipe over the movable contacts 12 but to he spaced from the track 6. Also secured to the arm l1 is a contact 14E continuously engaging the walls of the slot 7 in the inner track 'Ihe arm 4f. is composed of insulating material, and such being the case the wiper 13 is electrically connected to the contact 141 by the conductor 15.

Mounted upon the easing 1 is a pair of switches 16 and. 17 the former adapted to directly establish the continuity of the main circuit 18 while the latter is arranged to establish the continuity ofthe main circuit through the shunt circuit 19 the terminals of which are connected respectively to the inner and outer track.

Take for an example that the time switch is to establish the continuity of the main circuit from 8 p. m. to 1 a. m.; the movable contacts 12 are inserted in the outer track until the distance is bridged between the numeral 8, upon the scale 2O and the numeral 1. Upon the arm l reaching a point when the wiper 13 reaches the advance contact 12 current will iiow through the main circuit and will continue to do so until the wiper 13 leaves the rear contact 12.

From this arrangement it will be seen that in a very simple manner I am able to increase the time that the main circuit 18 is energized in such a manner as to insure a good electrical connection and thus minimize the resistance to the flow of current.

From the foregoing description taken in connection with the accompanying drawings the advantage of the construction and the method of operation will be readily apparent to those skilled in the art in which the invention. relates and while I have described the principle of operation of the invention together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made wheny de* sired as are within the scope of the claims.

What I claim is 1. In a time switch, a casing having a circular scale, a circular track mounted on said oasng within said scalo and formed` shaped to slidnbly enga-ge the Walls of the slot in said track and adapted to engage said arm.

2. In a time switch, L casing having a circular scale, a. Circular track mounted on smid Casing within said scale, and formed with LL T-shuped slot, an arm, and Contacts shaped to shdably engage the Walls of the slot in said ruck and adapted to engage smid zum, n second track, and a, Contact ozu'- l'od by Suid arm and continuously engaging tho Walls of a slot in said second track.

In testimony whereof I ax my signature in presence of two Witnesses.

GEORGE E. SCHINDLER. Witnesses H. A. DAVIS, BLOP FAGINICH.

Copies of this patent may be obtained. for ve cents each, by addressing the UCommissioner of Yatents,

. Washington, D. C.

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