US1733267A - Switch - Google Patents

Description

L. KELLNER Oct. 29, 1929.

SWITCH 2 Sheets-Sheet 2 Filed Oct. 1925 f loaz Patented Oct. 29, 1929 UNITED STATES PATENT OFFICE LOUIS KELLNER, OF CHICAGO, ILLINOIS, ASSIGNOR T JEFFERSON ELECTRIC COM- IPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS SWITCH Application filed October 2, 1925. Serial No. 59,990.

The invention relates to improvements in ence to switches of the type disclosed in my copending application, Serial No. 42,125 filed July 8, 1925, Patent #1,654,145 issued October 11,1927.

The primary object of the present invention is to provide a novel switch of the above type which is a double pole switch, and which is small and compact in size, simple and inex pensive in construction, and eflicient and cer tain in operation.

Ancillary objects and advantages will become apparent from the following description taken in connection with the accompanying drawings in which:

Figure 1 is a front view of a switch embodying the features of my invention.

Fig. 2 is a sectional View taken along line 2-2 of Fig. 1, and showing the contacts in closed position.

Fig. 3 is a fragmentary sectional view similar to Fig. 2, and showing the contacts in open position.

Fig. 4 is a sectional view taken along line 44 of Fig. 1.

Fig. 5 is a sectional view taken along line 55 of Fig. 1.

Fig. 6 is a perspective view of the fixed contacts.

Fig. 7 is a fragmentary sectional view of a detail of construction.

Fig. 8 is a perspective view of the supporting standard for the operating mechanism, and of one of the kick-off levers.

While the invention is susceptible of various modifications and alternative constructions, I have shown in the drawings and will describe in detail the preferred embodiment, but it is to be understood that I do not thereby intend to limit the invention to the specific form disclosed, but aim to cover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims.

Referring to the drawings, the switch comprises a hollow base 8 of any suitable insulating material, such as porcelain, to the opposite ends of which supporting arms 9 are secured by screws 10. The interior of the base constitutes a switch chamber 11 which is open at the front. Two sets of fixed contacts 12 and 13 are mounted in opposite ends of the base, and are arranged to provide a double pole switch. The contacts 12 preferably are clip contacts positioned next to the rear wall of the base 8 and opening upwardly, and are formed on the inner ends of two long metallic arms 14. The outer ends of these arms are bent to fit into notches 15 in opposite sides of the base, and are secured therein by screws 16. The contacts 13 also are clip contacts, and are spaced from the rear wall of the base and positioned in advance of the contacts 12. The contacts 13 are formed by folding the inner ends of two short arms 17 the outer ends of which are bent to, fit into notches 18 in the sides of the base in which they are secured by screws 19. Terminals 20 having binding screws 21 are connected to the contacts 12 and 13 by the screws 16 and 19 respectively.

Mounted in the base 8 is a switch operating mechanism which comprises a supporting standard 22 resting at its opposite ends in notches 23 formed in the end walls of the base. To secure the standard 22 in position, it is formed at its opposite ends with two lugs 24; extending laterally from opposite sides thereof, and engaging screws 25 extending through the rear. wall of the base.

Pivotally mounted on a pin 26 in the stan dard 22 is an outwardly extending operating lever 27 provided with a handle 28. The

0 crating lever 27 consists of a metal strip W hich is bent double, and the legs of which fit against opposite sides of the standard 22. An inwardly extending U-shaped lever 29 is mounted on the pin 26 and fits against the opposite sides of the lever 27. Struck out from opposite sides of the levers 27 and 29 are two pairs of lugs 30 and 31 connected by coil springs 32. The lugs 30 and 31 are located at opposite sides of the pivot pin 26,

. and therefore serve to carry the springs 32 across the pin, which constitutes a dead center, as the lever 27 is moved from one position into the other.

To prevent the lever 29 from sticking, a pair of kick-0E levers 33 is provided. These levers (see Fig. 3) are loosely mounted in the standard 22 at opposite sides of the pivot pin 26. In the present instance, each lever 33 is slotted as indicated at 46, and the standard is formed with downwardly opening slots 47. The levers 33 are pivotally mounted in the slots 47 with the inner ends of the slots 46 and 47 in bearing engagement. Each lever 33 consists of acentral inclined lug 34 positioned to be engaged by heels 35 on the inner ends of the legs of the lever 27, and of side lugs 36 extending laterally at opposite sides of the standard 22 to engage the legs of the lever 29. When the handle 28 is actuated to open or close the switch, the heels 35, at substantially the end of the movement of the lever 27 and after the springs 32 are positioned substantially across the ends of the pin 26, will engage the proper lug 34, thereby pivoting the lever 33 to move the lugs 36 against the lever 29. This institutes the movement of the lever 29 which movement is completed by the springs 32.

Mounted centrally in the rear of the base and at opposite sides of the standard 22 are.

two laterally spaced standards 37 secured in position by screws 38. Each standard is formed with a pivot bearing 39. Pivotally mounted on the bearings are two contact members or blades 40 and 41. Each contact member is adapted to be moved into and out of engagement respectively with the clip contacts 12 and 13 in one side of the base, and is formed with a forwardly extending arm 42 carrying a pin 43 which extends into a longi tudinalzslot 44 in one arm of the lever 29. The 43 is insulated from the arm 42 by an insulating bushing 45 (see Fig. 7).

To move the switch parts into closed position as shown in Fig. 2, or open position as shown in'Fig. 3, the handle 28 is actuated thereby elongatingthe springs 32 and moving them directly over the dead center. The heels 35 of the lever 27 engage the lug 34 of the proper knick-ofli' lever 33, and thereby move the lugs 36 against the lever 29 to institute the movement of the latter. Thereby the springs 32 are moved across the dead center, and act to complete the movement of the lever 29. In the movement of the lever 29 from one position to the other, the contact members 40 and 41 are oscillated into or out of engagement with the contacts 12 and 13.

It will be evident that I have provided a simple and inexpensive double pole switch which is compact and small in size, and which is positive and certain in operation.

Iclaim as my invention:

+1; A switch having, in combination, a supporting standard, a plurality of fixed contacts' constituting the contacts of a double pole switch, a pivot on said standard, a pair of levers mounted on said pivot one lever extending outwardly and the other lever extending inwardly, spring means connecting said levers at points on opposite sides of said pivot, said spring means upon actuation of said outwardly extending lever serving to shift said inwardly extending lever past the dead center, a pair of kick-01f levers mounted in said standard, said kick-01f levers being positioned for selective engagement by said outwardly extending lever and being operable upon such engagement to institute the movement of said inwardly extending lever, and a pair of contact blades pivotally mounted in said base for movement into and out of engagement with said fixed contacts, said blades being connected to said inwardly extending lever for movement thereby.

2. A switch having, in combination, a base, a plurality of fixed contacts mounted in said base, said contacts being arranged to provide a double pole switch, a pair of standards mounted in said base, a pair of contact blades pivotally mounted intermediate their ends on said standards for movement of their opposite ends into and out of engagement with said double pole contacts, each blade having a central laterally extending arm, a central standard mounted in said base, a lever pivotally mounted on said central standard and having a direct lost motion connection with each of said blades, and means for actuating said lever.

3. A switch having, in combination, a base, two sets of fixed contacts mounted in said base; apair of standards mounted in said base, a pair of contact blades pivotally mounted on said standards for movement into and out of engagement with said contacts, a central standard mounted in said base, a lever pivotally mounted on said standard and having a lost motion connection with each of said contact blades, an actuating lever mounted on said last mentioned standard, and spring means connecting said levers at points on oppositesides of their pivots,

said spring means bein'g adapted to shift said first mentioned lever' upon movement past dead center by said last mentioned lever.

4. A switch having, in combination, a base,

a plurality of sets of fixed contacts mounted in sald base, a pair of standards in opposite sides of said base and between said sets of contacts, a single supporting standard mounted in said base between said first mentioned standards, contact blades mounted intermediate their ends on said first mentioned standards for movement into and out of engagement with said fixed contacts, a lever mounted on said last mentioned standard and having a toggle connection with said contact blades, spring means tending to hold said connection in one position, and means for actuating said lever to move said toggle through dead center into the other position.

In testimony whereof, I have hereunto alfixed my signature.

LOUIS KELLNER.

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