US1408592A - Electric switch - Google Patents

Description

L. A. HANSON.

ELECTRIC SWITCH. APPLICATION FILYED OCT. 7, 1920.

Patented Mar. 7, 1922.

gwuenw'a M UNITED STATES PATENT OFFIQE.

ELEQTRIC SWITCH.

Application filed October 7, 1920.

To all whom it may concern:

Be it known that LARRY A. Hanson, a citizen of the United States, residing at Altoona, in the county of Blair and State of Pennsylvania, has invented certain new and useful Improvements in Electric Switches, of which the following is a specifioation.

This invention relates to electric switches which are adapted to rotate and establish contact with different radially spacial terminal points, and the primary object of this invention is to provide an electric switch which has no moving parts back of the panel board, and is susceptible of being readily attached and detached from the front of the panel board. v

A further object of the invention is to provide means for readily removing the switch arm for the purpose of inspection and 'enewal without disturbing the fasten ing means back of the panel board.

A still further object of the invention is to provide adjustable stops for the switch arm, as an integral part of the switch mechanism.

With these and many other objects in view which will be more readily apparent as the nature of the invention is better understood the same consists in the novel construction, combination and arrangement of parts as will be more fully pointed out illus- V trated and claimed.

It will of course be understood. by those skilled in the art to which this invention belongs that the same is susceptible to various changes in construction without departing from the spirit or scope of the invention, but a preferred and practical embodiment of the invention is shown in the accompanying drawings in which;

' Fig. 2, is a plan view of the parts shown in Figure 1.

Fig. 3, shows a plan and sectional view of the cap used to hold the switch in position on the face plate or panel board.

Fig. 4:, shows a cup shaped base which is adapted to be positioned on the panel board and to coact with the parts shown in Figure 3 of the drawings.

Fig. 5, shows a plan and sectional view of the switch blade support, which is held Specification of Letters Patent.

in position by the cap shown in Figure 3 of the drawings.

Fig. 6, shows a plan and side view of the switch blade usedin connection with the improved switch.

Fig. 7, shows an elevational view and an edge view of the locking ring used to hold the cap in position. i

Fig. 8, shows aresilient disk which forms a flexible bearing for the rotatable part of the switch, the flexible bearing forming a electrical contact surface between the stationary part of the switch and the rotatable part as shown in Figure 5 of the drawings.

Fig. 9, shows one element of switch stop mechanism which'is shown in position in Figure 1 of the drawings.

Fig. 10, shows the stationary element of the switch stop mechanism which is shown in operative position in Figure 1 of the drawings.

In carrying out this invention no change is contemplated in the panel board to Which the switch is attached and to this end I have provided a switch that-is readily applicable to existing panel boards and consists essentially of a cup shape base element designated by the numeral 10, having threads cut on the out side surface 11, and provided with a base having the central portion 12 pressed upward, such as to form a flat circular bearing face 13 for a resilient disk 14:. which is adapted to be positioned within the cup 10 and be engaged by the periphcrial surface 15 oi an inverted cup shape housing 1b having an outward flaring base constructed in such manner that the body 17 of the housing has a smaller diameter than the base portion 18 the two diameters forming an offset 19 in the body '17 against which the peripheral surface 20 of a cap 21 is adapted to rest as shown in Figure 1 oi the drawings.

The cap 21 further provided with a flaring base which is slightly larger in diameter than the body portion. The flaring base forms a shield or cover for a locking ring 23 which is shown in position in Fig- .screw 28 provided with a plurality of perforations 26 and 27. The perforation 26 is designed to receive a knob holding screw 28, as shown in Figure l of the drawings, which is adapted to hold the switch arm 29 in position on the face 25 of the cupped housing 16. The passing through the opening 28 into the knob.

For the purpose of preventing the switch arm 29 from rotating independent of the housing 16, there is provided a perforation 28 through which an upturned portion 35 of a switch stop 36 is adapted to pass, thus locking the arm in relation to the housing 16. The stop 36 is further provided with a downward projecting wing 37 which is adapted to enter into striking engagement with a stationary limit post 38, or 39 when the switch arm 29 is rotated such that the post 32 engages the terminals as the switch arm is moved from one side to the other.

For the purpose of providing a common central terminal for all the terminals set in the semicircle as shown in Figure 2, I prefer to use a threaded bolt 41, which is adapted to pass through the panel board 412 and to hold not only a terminal wire 43 but to form a, position holding device for the switch stops 38 and 39 in addition to holding the cup 10 in position on the panel board, as well as the disk 14 within the cup 16 in its operative position as shown in, Figure 1 of thedrawings.

From the foregoing it will be readily apparent that the above described switch can readily be taken apart for examination by first unscrewing the cap 21, which holds all the operative elements of the switch together. Having unscrewed the locking collar 21 from the base 10 the switch arm 29 can be readily cleaned or the switch mechanism can then be readil examined. I

Having thus described my invention what I desire to claim and secure by Letters Patent is 1. In an electric switch, in combination with a panel board, a cup shape base hav ing a struck up centre adapted to be secured to the panel board, a resilient disk positioned. withinthe cup shape base and adapted to coact with the struck up central portion of the cup, an inverted cup adapted to engage the said disk and means for drawing the inverted cup in position on the disk.

2. In combinationwith a panel board, an electric switch adapted to be rotatively secured to the panel board, a stationary cup shaped base having a struck up centre, a resilient disk, an inverted cup having a widened mouth which is adapted to impinge on the disk and make electrical contact therewith, a switeh stop positioned on the stationary base and a pendent element, positioned on the rotatable part of the switch,

adapted to engage the stationary stop and thus limit the swing of the switch.

3. In combination with an electric switch, a panel board to which the switch is adapted to be attached, a stationary base attached to the panel board, a rotatable inverted widened mouth cup, means for securing the rotatable cup to the base and resilient means for locking the rotatable cup to the stationary base, an interior threaded inverted cup having an opening in the base therein through which the rotatable cup is adapted to pass, a locking ring, a switch blade, a knob, the blade adaptedtobe sandwiched between the base of the rotatable cup and the knob.

4. A mounting for electrical switch arms including in combination with a support for the electrical contacts, of a base member secured to one face of the support, a handle element carrying a switch arm, and means engaging with the handle element and also with the base member for rotatably and detachably connecting the handle carrying the switch arm to the support.

5. A mounting for electrical switch arms including in combination with the panel board and contacts carried thereby, of a member locked to one face of the panel board, a handle carrying the switch arm, means for tensioning the handle, and means engaging with the handle and alsowit'h the member secured to the panel for detachably holding said handle in position and also causingthe handle to engagethe tensioning means with more or less force.

6. A mounting for electrical switch arms including in combination with the panel board and contacts carried thereby, of a rel-' ativel cup shaped member secured to one face of the panel board, a handle carrying the switch arm, a cap-like member carried by the handle and having an annular abutment shoulder, and a ring like member adapted to engage with said shoulder and the upstanding portions of thesaid cup shaped member to thereby rotatably mount the handle in such a manner thatitis detachable from the exposed face of the panel board. r

7. In a rotary electric switch in combination with a panel board a stationary base having adjustable stop elements enga ing stop elements on the rotatable part '0 y the switch thus limiting the relative movement a of the rotatable tionary base.

In testimony whereof I have aifixed,,my signature in the presence of two witnesses.

LARRY A. HANSON.

part of the switch. stalVitnesses N. E. GEE, ,ADAMLnaKn.

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