US1570913A - Snap switch - Google Patents

Description

Jan. 26,1926. v V 1,570,913

. j C. L. MOYER sm1= SWITCH FiledOctQ 23, 1924 2 shun-shut 2 flm/aiz, WZgew Jan. 26 1926. 1,570,913

c. L. MOYER SNAP'SWITCH Filed Oct. 25, 1924 2 Shah-Shoot 1 x54 LE4, 6

jaeizi r v6 UMP/65E W Patented Jan. 26, 1926.

CHARLES L. MOYER, OI CH ICAGO, HJIIINOIYS- SNAP SWITCH.

Application filed October 23, 1924. Serial No. 745,377.

To all whom itmay concern:

Be it known that I, CHARLES L. Moran, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in. Snap Switches, of which the following is a specification.

My invention relates to snap switches and is designed primarily for use in flat irons such as are shown for example in the application of Joseph N. Pagliarul filed on the 23rd day of October, 1924, Serial No. 745,376. The object of my invention is to provide for a tool of that character a switch which will operate with a snap action. It is also my purpose to provide a switch of that character in whichthe circuit closing elements are biased toward open or off position and will automatically return to such position when the pressure upon the controlling'element is released.

I obtain my objects'by the mechanism illustrated in the accompanying drawings in which Figure 1 is a general view of a flat iron showing the manner in which my invention may be applied to it.

Figure 2 is a view showing the inner side of the two-part body in which my form of switch is mounted.

Figure 3 is similar to the left portion of Figure 2 except that it shows the switch in on position instead of ofi position as in Figure 2.

Figure 4 is a sectional view on the line 4-4 Figure 2.

Figure 5 is a sectional view on the irregular line 55 Figure 2.

Figure 6 is a sectionalyiew on the irregularline 66 Figure 2.

Figure 7 is a distributed view showing the principal parts of my switch grouped but separated 1n such manner as to indicate the way in which they cooperate when assembled.

Like numerals denote like parts through levers.

19 made of suitable insulating material. The lower portion 20 of the body constitutes a plug which makes a sliding fit with the socket 14. The body is provided with terminal clips 22 arranged in two pairs for making engagement with the'terminal pins 16. One of these clips is connected by conductor 24 to one of the external supply conductors 26. The other is connected by a conductor 28 to switch jaws 30. A switch blade 32 moves intoand out of engagement with the jaws 30. It is pivoted on a stationary pin 34 as shown in perspective in Figure 7. This switch blade is provided with lugs 36 projecting sidewise from it to be engaged by a lever 38 which is also pivoted upon pin 34 and is shackled by means of a shacklchead 41 to a rod 39 slidingly mounted in a lug40 projecting from the side of a stationary bar 42. Said bar is con nccted by conductor 44 to one of the external supply conductors 46. A compression spring 48 is interposed between the lug 40 and the shacklehead 41, and this tends to press the rod toward the pivot pin 34 which tends to tilt the lever 38 to one oblique position or another, depending upon which side of the straight line the lever happens to be 1 ing on at the moment. In other words, the spring 48 tends .to hold the lever, 38 past center with the result that a sudden movement will be imparted to lever 38 if and when pressure is exerted upon the shacklehead 41 in a direction crosswise of rod 39. This imparts a snap action to lever 38 and to switch blade 32.

This crosswise or transverse pressure is exerted upon the 'shacklehead 41 by a plunger or push button 50 which is slidingly mounted in the body of the device. Said plunger is supported upon a compression sprin 52 which is strong enough to force the siacklehead past center in a direction to keep the switch blade 32 out of engagement with the switch jaws 30. Thus if the push button is released at any time it will be strong enough to move the switch from on to off position. v

It will be evident that my switch has some of the characteristics of a toggle in which the plunger 50 corresponds to the pitman and thelever 38 and rod 39, which are piv otcd together, correspond to the toggle M switch might therefore be termed a' toggle switch.

A hand lever 54 is pivoted to the main jaws 30. As soon as the push button is re leased, however, the spring 52 will return the plunger to normal position, which will throw the switch blade to oti position. Thus the switch operates with the desirable quick make and break action, but the switch will be on only so long as the plunger is under pressure and will be immediately returned to open position as soon as the pres- 7 sure on the plunger is released.

It will be observed that there is considerable play or lost motion between the lever 38 and the lugs 36 with which it cooperates. This increases the suddenness with which the switch blade 32 operates. It also decreases the force necessary to operate the plunger 50 for the lever 38 is not carrying any load, so to speak, during the first portion of its movement toward changed position. During the initial portion of the movement the lever is free to move without moving a switch blade, and while the movement of the lever is being completed it has the assistance of the compression spring 48 surrounding rod 39.

The operation has now been described in detail. It will be evident that the switch blade 32 will be normally held out of engagement with its cooperating jaws 30, but that as soon as the operator grasps the handle of the tool the lever 54 will be depressed and the switch blade 32 will move with a snap action into engagement with the jaws 30. A slight upward movement of the lever will have no eiiect to disturb the switch blade, and hence moderate movements may take place without opening the circuit. However, if the operator lets go of the tool the spring 52 will cause the plunger 50 to rise and promptly break the circuit.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A snap switch having a switch blade,

a toggle-like couple for operating it, said couple comprising two members pivoted together and pivotally supported, a spring acting upon one of said members in alinement therewith for breaking the toggle when the latter is forced beyond center in either di rection, and a plunger siidable transversely to said couple and adapted to engage it near the connected portion thereof for moving it past center.

2. A snap switch having a Switchblade, a toggle-like couple for operating it, said couple comprising two members pivoted together and pivotally supported, a spring acting upon one of said members in alinement therewith for breaking the toggle when the latter is forced beyond center in either direction, a plunger slidable transversely to said couple and having a recess in the side for accomodating the central por tion of the couple for moving it past center in both directions.

3. In a snap switch a switch blade, a lever for operating it, a rod connected to the lever at a point remote from the lever pivot, said rod being movably supported at a point remote from its point ot'connection to the lever whereby the lever and rod form two elements of a toggle-like couple, a spring associated with said couple for urging the same past can ter in either direction as soon as center position is passed, and a plunger slidable transversely to said couple and adapted to engage said couple at the connected portion thereof for moving it past center.

4. In a snap switch a switch blade, a lever for operating it, a rod connected to the lever at a point remote from the lever pivot, said rod being movably supported at a point remote from its point of connection to the lever whereby the lever and rod form two elements of a toggle-like couple, a. spring associated with said couple for urging the same past center in either direction as soon as center position is passed, a plunger slidable transversely to said couple for moving it past center, and a spring operative upon said plunger to normally hold the latter and switch blade in off position.

In witness whereof, I have hereunto sub scribed my name. 2

CHARLES L. MOYER.

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