US1422180A - Electric switch for winding drums - Google Patents

Description

C. H. CUNO.

ELECTRIC SWITCH FOR WINDING DRUMS.

APPLICATION FILED FEB. 3,1922.

1,422,180. Patented uly 11, 1922.

IN VEN TOR A TTORNE Y UNITED STATES PATENT OFFICE.

CHARLES H. CUNO, OF HERIDEN, CONNECTICUT, ASSIGNOR TO THE CUNO ENGINEER- ING CORPORATION, OF MERIDEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

ELECTRIC SWITCH FOR WINDING DRUMS.

Specification of Letters Patent.

Application filed February 3, 1922. Serial No. 533,828.

I To all whom it may concern Be it known that I, CHARLES H. CUNo, a citizen of the United States of America, residing at Meriden, Connecticut, have invented a new and usefulElectric Switch for Winding Drums, of which the following is a specification.

My invention relates to winding devices for trouble lamps, cigar lighters and other translating devices, and particularly to the means for turning the current on and off.

The main object is to provide a simple, ineX ensive but reliable form of switch, whic can be readily operated to turn the current on or off, as desired, irrespective of the rotation of the drum. Many devices of this general type are intended to turn the current on and oil automatically as the drum rotates. Others are dependent upon manipulation of the translating device or separate switches carried by the translating device. I have provided a hand-operated switch associated with the casing which carries the drum.

In the accompanying drawing:

Figure 1 is a side view of a device embodying the improvements of my invention, the switch being. shown in the on position;

Fig. 2 is a front view of the same, the translating device and cover being omitted;

Fi 3 is a horizontal fragmentary section showing the switch; and

Fig. 4c is a perspective view of a fragment of the casing and the switch-operating lever separated.

The casing 5 may be of any suitable construction, usually of metal, provided with a face plate or support 6, in which the lamp, cigar lighter or other form of current consuming or translating device is adapted to be supported. I

Inside of the casing is mounted a rotating drum having a hub 8 of insulating material, rotatable on a stationary shaft 9. The flange 10 of the drum, which contains the well known winding spring, is of metal and connected to one of the conductors, and also in electrical connection with the casing which has the binding post or terminal 11.

The other flange 12 of the drum is connected to the other conductor of the pair. Alongside of the flange 12 I mount a spring contact arm 13, which is normally not in contact with the" casing and not in contact with the flange 12. The foot 14 of this contact member 13 is connected with the binding post, or terminal 15, which is insulated from the casing. Between the switch contact 13 and the casing I interpose an insulating member 16, the foot of which is held in place beneath the insulating block 17.

A detent or spacer preferably in the form of a ball 18 is supported in a recess 19 in the side of the casing, adjacent the insulating member 16. Outside of the casing is a slide 20, which has a recess 21 for the ball 18, when the switch is in the off position. This slide is supported between the guide fingers 22 at the side of the casing and in the opening 23 in the front flange of the casing. The stop 24 limits the inward movement, and the shoulders 25 limit the outward movement. The slide is provided with a suitable knob 26 for manipulating it.

When the slide is pulled out from the position shown in Fig. 3, the ball 18 pushes against the insulating strip 16 and forces the end of the contact arm 13 into engagement with surface of the flange 12, so as to effect electrical contact. The end of the contact arm 13 may be bifurcated, so as to give a relatively slight pressure and yet insureperfect electrical connection. By extending the contact arm considerably above the slide, the effective movement of the slide is multiplied materially. I also prefer to provide a relatively small recess 27 for the ball when the switch is in the on position, so as to prevent accidental longitudinal movement. v

By means of this construction the current can be definitely turned on or off, as desired, without regard to the rotation of the drum or the location of the current consuming de vice. The construction is such that there is only a light contact between the drum flange and the contact arm of the switch when the switch is on. This keeps the contact surfaces polished and ensures a good connection. It is thus possible to provide a good connection with a pressure that is so light that it furnishes very little retardation to the rotation of the drum, either in pulling out the cord or allowing it to wind up.

I claim:

1. The combination of a casing, a winding drum therein having a conducting flange, a spring arm contact'normally out of engagement therewith, and a manually Patented July 11, 1922.

operallle slide adapted to force said spring arm -ontact into engagement with said flange.

2.- The combination of a casing, a winding drum mounted therein and having a conducting flange, a contact arm mounted be tween said flange and said casing, a manually operable slide mounted on the outside of said casing, and means of connection between said slide and said contact arm for operating the same in one direction.

3. The combination of a casing, a rotating drum mounted therein and having a conducting flange, a contact arm between said flange and said casing, a slide mounted on the outside of said casing, and a ball interposed between said slide and said contact arm.

4. The combination of a casing having projecting fingers, a slide guided thereby, a drum mounted in said casing having a conducting flange, a contact arm insulated from said casing and adapted to engage said flange, and means of connection between said slide and said contact arm.

5. The combination of a casing, a winding drum mounted therein and having a conducting fian e, a contact arm mounted adjacent said ange, an insulating strip mounted between said arm and said casing, a manually operable member carried by said casing having a reces, and a ball supported between said recess and said strip when the parts are in a closed circuit position.

6. The combination of a casing, a winding drum mounted therein and having a movable part, a spring contact arm normally out of engagement with said part, a ball supported by the casing, an insulatin strip mounted between said ball and said contact arm, and a manually operable member for moving said ball.

7. The combination of a casing, a winding drum mounted therein having a movable conducting part, a slide supported by said cas1ng, a spring contact arm mounted in said casing for engaging said conducting part, and a ball supported between said slide and said arm and transmitting motion from one to the other.

OHARLESH. cUNo.

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