US1643210A - Electric switch - Google Patents

Description

M. GUETT Sept. 20, 1927.

ELECTRIC SWITCH Filed June 10,

1924 5 Sheets-Sheet l 1,643210 Sept. 20, 1927. M. GUETT ELECTRIC SWITCH Filed June 10, 1924 3 Sheets-Sheet 2 Sept. 20, 1927. 3, 10

M. G U ETT ELECTRIC SWITCH Filed June 10, 1924 s Sheets-Sheet 5 Patented Sept. 20, 1927.

UNITED S ATES 1,643,210 PATENT' OFFICE.

MONROE eunr'r, muons, connncrrcunnssrenon To run HART & inseam MANUFACTURING comremr, or'nnn'rronn, CONNECTICUT, A CORPORATION or commences.

. nnnc'rmc swrrcir.

' Application filed'l 'une 10.1924. I sc n no.--7i9,i12. I

One-object of my invention is to construct an electric switch, which; is especially adapted for regulating the amount of current, passing to an. electric heater, or other devices requiring diiferent amounts of current.

- A further object of the invention is to construct the mechanism so that a switch plate can be raised clear of a stop plate when the switch direction, and can e lowered clear of the stop plate when the spindle is turned in the opposite direction. I p v c In the present instance, the switch is ar- 16 ranged to control three different degrees of heat and to cut ofl the current, but it will be understood that the number. of terminalscan be increased, or decreased, without de parting from the spirit ofthe invention. While the improved switch is particularly adapted for use in connection with an elec tric heater, it will be understood that'it can be used wherever a switch of this type is desired. I c

In the accompanying drawings:

Fig. 1 is a sectional elevation of my improved switch on the line 1-1, Fig. 2;

Fig. 2 is a sectionalplan view on the line 2-2, Fig.1; I p Fig. 3' is a sectional plan view on the line Figs. 4, 5 and 6' are diagrammatic v ews illustrating difierent positions ofthe catch plate. in respect to the stop plate; and Fig. 7 is a erspective view illustrating parts of the switch detached.

of the switch. Locatedin a recess 2 in the base is a stop plate 3, which is shaped as shown in Fi 7, and secured to the base by screws 4;. epending from the center of t e stop plate is a' bearing 5 for the lower endof the spindle 6. Below the bearing is a slotted washer 7, which locks the spindle imposition. The ortion 8 of the spindle has screw threads t ercon and rests upon the top of the hearing so that the spindle isheld from moving longitudinally in the bearing, yet is free to turn therein. 1

The body portion 9 of the switch is mounted on the spindle so as tohave a ited movement thereon, which is controlled by the spindle through the medium of a coiled spring 10. The body portion 9 has. switch plates 11 and 12, which are arranged indle is-turned in one- .18. Depending from a collar 22, secured to of the spring sponding direction.

,rods ass through non-conductin sleeves 21.

The ody portion may be modi ed without departing from the essential features of the nvention. The arrangementofthe switch plates and terminals may also be varied.

.- Projecting from the plate 18' is an arm 2 the spindle, is an arm 22. The ends of the spring 10 extend-0n each side of the arms, as shown clearly in Fig. 2 sothat, when the spindle is turned clockwise, the upper end.

is engaged by'the arm 22 to shift thebo y portion 9. When the spin dle is turned counter-clockwise, the lower endof the spring is engaged by the arm 22',

which rotates the body portion in a corre- Carried by the collar 22 is an) indicator disk 23, which "has indicating marks thereon that can be exposed through a slot 24 in the cap 25, which encloses the working parts of the switch. Secured to the spindle 6, above the cap, is a handle 26 of an suitable con struction. 'The handle is hel tothe spindle bya nut 27.

The. switch hereinbefore described is j known as a snap switch. The s ringis 901.

contracted to a certain extent and t e body Referring to the drawings, 1 is thebase notches 28 in the stop plate'3. These pro- -jections 31 are beveled'sllghtly, as shown,

and pass above or below the portions 29 of the stop plate, depending u on the direction of movement of the spin la. The catch plate 30 is notched at 32. Depending from the bottom plate 19 of the body 9 are arms 33, which extend into the notches 32 of the no catchplate'so that, while the catch plate free to move vertically, it must turn withthe body ortion whenit is released the contro of the stop plate.

Referring to Figs. 4, 5 and 6 it will be seen that when the catch plate is in mid position, Fig. 4.-, it is locked from turning by the stop plate 3, as its projections 31 are in the notches 28 of said stop plate. When the handle is turned clockwise, the spring is compresed and is-moved a-certa n number of 7 degrees to raise the catch plate clea'r'of the. stop plate, as'in Fig. 5. Thismovement releases the body portion and the spring snaps the bod portion to the next position. The

catch p ate, however, does not move the full extent of themovement of the spindle and the spring isstill under tension. While the projections of the body portion are in position above the recesses in the stop plate, they do not engage both sides of the notches. On therelease of the handle, the spmdle. 1s moved backwards until the end of the spring comes in contact with the post on the body portion. This movement causes the screw toinove the catch plate vertically into-the F notches so that its projection'sare held between the two walls of thenotches in the stop plate. This movement can be repeated to turn the switch from the Off position to the Low position, the Medium position, and the Hi h position. 'When the spindle is turned anti-clockwise,

'as'in Fig. 6, the catch plate is lowered bythe action of the screw untilit is clear of the stop plate and the spring will snap the body portion from one terminal to another, as

hereinbefore described.

, I claim:

1.- The combination in an electric switch,

, of a base; a-stop plate secured thereto; a

stop plate, said catch plate having a thread mesh ng with the thread of the screw so that, when the spindle is turned in one dlrec- 'tion, the catch-plate is raised above the stop plate, and, when the spindle is turned in the reverse direction, 'itis moved below the stop plate.

2." The'combination in aswitch, of a base;

a notched stop plate thereon; a notched.

catch plate having portionsarranged to extend into the notches of the-stop plate; a

'spindle having switch plates thereon; terminals arranged to be engaged b the switch plates; and means, onthe spln le, for raismg the catch plate above the stop plate when the spindle is'turned in one direction, and

for lowering the catch-plate below the stop plate when the spindle is turned in the reverse. direction.

3.. The combination of a base; a notched from stpp plate thereon,- said plate having inchned projectin portions; a spindle having a screw thread t ereon; a catch plate having a thread meshing with the screw thread and 1 arranged to be raised or lowered on. the

movement of the spindle; a body portion having a-switch plate; and aspring connection between the body portion and the spindle, said catch plate being guided on the body portion so that it will turn therewith by theaction of the spring when the catch plate is below or above the stop plate.

4. The combination in a rotary snap switch, of 'a base; astop plate having notches therein secured to the base; a spindle; a body-portion mounted on the spindle, but arranged to rotate independently thereof to a limited extent; a spring engaged by the spindle and by the body portion, said spindle having a screw thread thereon; a catch plate having a thread meshing with the thread of the screw, and having portions aligning with the notches of the stop plate so that, when the plate is in a central position, the switch is held by the stop plate, and, when the spindle is turned clockwise, or counter clockwise, the catch plate is raised or low- .cred,releasing the body; a switch plate on the-body; and terminals so located as to be engaged'by the switch plate.

5.'The combination in an electric switch, of a. fixed stop-plate having inclined projectlons; a catch-plate arranged to engage the stop-plate; a screw-threaded spindle for raisin the catch-plate to a point above the sto '-p ate or lowering it to a point below sai stop-plate; a body portion connected to the catch-plate, said body portion having contact plates; and a spring for' snapping the body portlon from one position to another so that, when the catch-plate is moved out of alignment with the stop-plate, the body portion will sna from one position to another and the catc late will be moved into engagement with t e stop-plate.

6. The combination in an electric switch, of a fixed stop plate having rojections; a spindle having a screw threa the projectionsof the stop plate being on the same lead as the threads of the screws; a catch plate having projections and arranged to engage the pro ect1ons of the stop plate, and also havin a thread meshing with the threads of t e screw; a body portion mounted loosely on the s indle and connected to the catch plate; an means for snapping the body portion from one position to another in either direction when the catch plate is moved above or below the stop plate by the screw, said catch plate traveling on the screw to re-engage the stop plate at a predetermined oint.

-7. T e combination in an electric switch, of a stop plate having s aced inclined projections; a catch plate aving projections engaging the stop plate; a bod 7 portion connec'ted to the stop plate; a spin e; ascrew on turn the spindle and moves the projectionsof the catch plate into the spaces between the inclined projections of the stop plate.

of a stop plate having notches; inclined proavjec'tions between the notches; a spindle ing a screw of the same lead as the inclined projections; a catch plate mounted on the screw and having projections arranged to enter the notches in the stop plate; a body portion connected to the catch plate; and a spring between the body portion and the spindle, which, whenthe spindle is turned, moves a given distance to release the catch plate and-to snap the body portion from one position to another, said spring having an' excess movement, which retractsthe spindle, 8. The combination 1n an electric swltch,

when released, and causes the screw to move the projections of the catch plate in between the walls of the notches of the sto late.

. v iMONROE TT.

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