US1256332A - Switch mechanism. - Google Patents

Description

H. F. KRANTZ.

SWITCH MECHANISM.

APPLICATION FILED MAYS, I914 Patented Feb. 12, 1918.

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SWITCH MECHANISM.

APPLICATION FILED MAY 5. l9l4.

Patented Feb. 12, 1918.

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TUBING- COMPANY, IN (3., OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

SWITCH MECHANISM.

Application filed May 5, 1914. Serial No. 836,423. I

To all whom it may concern:

. Be it known that I, HUBERT F. KRANTz, a citizen of the United States, residing at Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Switch Mechanism, of which the following is a clear, full,

and exact description,

This invention relates to an improved electric switch mechanism for use with either a push button, lever throw or pull switch, particularly of the quick-make and quick-break DP It is the object of the invention to make a switch of this character in which the user upon breaking contact and up to the time of actual break will necessarily increase the pressure on the contacting parts, and in which the contact, when once made, will be maintained by resilient pressure on the part of the operating means. I prefer to use a switch blade. which is inherently resilient itself in accomplishing the purpose set forth. A more detailed ob ect of the invention is to provide a quick-breakmechanism made up of spring parts movable through a dead centerlposition to reverse the etfect of said spring parts from a force tending to on position to a force tending to off position,

and to provide a contact member of such anature, and so connected as to serve in part, to effectually prevent the spring parts from standing in the dead center position.

The scope of my invention will be set forth in the claims.

In the accompanying drawings:

Figure 1 is a side elevation of a pull form of my improved switch.

Fig. 2 is a section on line 22 Fig. 1.

Fig. 3 is a section on line 44 of Fig. 4.

Fig. 4 is a plan of Fig. 1.

Fig. 5 is a sectional view of a push button switch on line 5-5 Fig. 6. I

Fig. 6 is a section-on line 66 Fig. 5.

Fig. 7 is a section of a leverthrow switch, on line 77, Fig. 8.

Fig. 8 is a section on line 88 Fig. 7.

Fig. 9 is a view similar to Fig. 5 of a modified type of push button switch.

In the drawings: Figs. 1 to 4, I haveillustrated my invention as applied to a pull switch.

The base plate 1 has a terminal device Specification of Letters Patent.

consisting of four flat contact plates 2, 3, and 5 to which supply conductors and branch circuit conductors are connected.

4 HUBERT F; KRANTZ, OF BROOKLYN, NEw YoRK, ASSIGNOR '10 KRANTZ MANUFAC- A casing 6 guides an operating rod '7 I which may be reciprocated from the position shown in full lines, Fig. 3 to that shown in dotted lines. Contact blades 8 and 9 carried by a rec1procatory carrier 10, and of the inherently resilient or brush type are adapted to contact with the terminal plates.

The carrier 10 surrounds and is guided upon the casing 6, and consists of side plates 11 and 12 secured by end rods 13.

The operating rod 7 is recessed at 14 and provided with a shaft 14 on which is mounted two rods 15 and 16, their ends passing freely through openings in blocks 17 and 18 pivotally mounted in the carrier 10.

Springs 19 and 20 abut against collars 21 on the rods 15 and 16 and the other end of' each spring rests against the blocks 17 or 18.

The device, when in the position of Figs. 1 to 4, in contact, due to the springs 19 and 20, carries the contact blade or blades to bear with pressure of the springs upon the terminal blocks.

\Vhen it is desired to break contact the springs are even more greatly compressed until they reach a dead center, when the slightest additional movement causes them to lift the contact blades and break the circuit I find in practice that such dead center is only theoretical and that it is impossible to cause the switch blade to stop in such position.

This immediately destroys the dead center position and renders the springs 19 effective to send the carrier forthwith into the 0H position. The pressure of the springs 19 for urgin the blocks 17 and 18 downwardly is somewhat increased when the pivot pin 14A begins its downward movement, and as the downward 'movement proadded force until when the pivot pin 14 has reached a point almost the dead center position this force 1s suddenly released to cause destroyed, perhaps causing the pivot centers of the bloclis to bound above the plane of thepivot pin. This im-' mediately destroys the dead center position and renders the springs 19 effective to send the carrier forthwith into the'ofi'.'

position. This is a very important advantage of the combination in that it insures a,

full, complete and positive operation of the device with every downward movement. of

the operating rod. Moreover, it enables the employment of a fiat surface contact between the switch blades and the contact ter.- minals. In this latter connection it should be noted that where a fiat surface, contact is employed anda dead center position of' the springs is possible, then if. at any time such a dead center positionbe assumed, as

by not pressing down the rod sufficiently far,

button type.' The terminals,-.blades, carrienbperating springs and their rods and blocks are as shown in the figures before described with relation to the pull type of switch, but the central reciprocating operating rod is replaced by astationary post 30 on which tWo connected collars 31 and 32 are slidable. The collar 31 is secured to the rods '34 of the operating mechanism and the collar 32 to a link 35-secured to a push button 36. A rocker arm 37 pivoted at 38 to the post 30 is attached to the push button 38 so that th collars may by .push button action be caused to move the. rods 34 into and past dead center, as in the pull type heretofore described. V

A lever type of switch is shown in Figs. 7 and 8.'

To the base,.40 upstanding terminals 41 and 42 are secured, inherently resilient switch blades 43 carried on insulating blocks 44 and of a general L shape are adapted to make contact as shown in Fig. 7. The insulating blocks 44 are secured to a sliding carriage 45 sliding on; guides 46.

A pivoted block 47 on the carriage 45 has a rod 48 passing through the center. The rod carries a spring-49 and is secured to one end of a-lever 50 pivoted at 51 to the face of the switch;

In the position of Fig. 7 the spring 49 continually presses the contact blade against its terminals. Upon swingin 'the switch lever over to position indicated by dotted lines as soon as the rod passes a perpendicular osition (dead center) the blade will be slot to the left and contact immediately broken.

In'carryin'g out this invention, details of construction may 'be' varied from those shown, and yet the essence of'the invention be retained; some parts might be employed without others, and new features thereof might be combined with elements old in the art-in diverse ways, althought-he herein ele-v scribed type is regarded as embodying sub-' 'stantial improvements oversuch modifica.' .tlons.

As many changes could be made in the above construction, and many apparently widely different embodiments of the-inven tion could be'made without departing from the scope thereof, it is intended that all matter contained in the above description or shown'in the accompanying drawings shall be interpreted in an'illustrative and not .in a" limiting sense. 7 e

It is furthermore desired to Be understood i that the language used in the followingclaims is intended to cover. all thegeneric and specific features of theinvention herein described, and all statements 'of'the scope of the invention which as a matter of language might be said to fall therebetween.

I claim asmy invention:

1. In a switch mechanism, comprising a quick-break means for' moving the switch blade away from a contact member, said quick-break means including 'aspring exert- '105 ing a tendency to urge the switch blade agamst the contact, andsaid spring being f movable through a dead-center position for reversing its efi'ectiveness upon the'switch blade to thereby break the switch bladeaway from the contact, the'cpmbination therewith of a flexible switch blade which is connected between the spring and the contact to re: ceive pressure from the spring, and an op-- crating member operable upon the spring to increase the pressure of the spring against the switch blade andthereby to flex the switch blade between the spring and the'contact, said operating member being also 1 adapted to move the spring through its dead-center positionjo relieve the pressure of the spring upon theswitc'h blade and thereby to enable the stored energy in the switch blade to cause' the-switch blade to move in a'direction away from'the contact and thus to act as an auxiliary to the breakmg action of the spring. t

2. In a switch mechanism, a flexible switch blade movable toward and away' from a relatively stationary contact memsaid carrier having an opening therethrough within which the toggle operates, a guide member for the carrier also received in said opening, the flexible switch blade being mounted upon the carrier so as to receive pressure from the springs of the toggle through the carrier, and an operating member operable upon the toggle to increase the pressure of the springs thereof upon the carrier and thereby to flex the switch blade against the contact by pressure from the carrier, said operating member being also adapted to move the to gle through its dead-center position to re ieve the pressure of the springs of the toggle upon the switch blade and thereby to enable the stored energy in the switch blade to cause the switch blade to move in a direction away from the contact and thus to act as an auxiliary to the breaking action of the toggle.

3. In a switch mechanism, comprisinga floating carrier, a contact member supported by the carrier to move therewith, a standard, a member slidable upon said standard, a pair of spring devices connected between said member and said carrier comprising a double spring toggle of which said member is the knee Joint, the double spring toggle being movable by said member through thedead-center position for exerting pressure to urge'the carrier suddenly into on or off positlons, an operating lever pivotally mounted intermediate its ends, link connections between said lever and said member to slide said member for operating said toggle in response to the swinging movements of said lever, and means whereby said lever may be swung in either direction at will.

Signed at New York city, New York, this 4th day of May, one thousand nine hundred fourteen.

HUBERT F. KRANTZ.

Witnesses:

MABEL DITTENHOEFER, Fnnn F. Wmss.

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