US1500479A

US1500479A - Switch lock

Info

Publication number: US1500479A
Application number: US645712A
Authority: US
Inventors: Zeman Edward
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-06-16
Filing date: 1923-06-16
Publication date: 1924-07-08
Anticipated expiration: 1941-07-08

Description

July 8 1924;

' 1,500,479 E. ZEMAN SWITCH LOCK Filed June 16. 1923 INVENTOR Y ATTORNEYS the; means of securing the rcontactj-point in one of the contact. arms of the switch. a

- of the arrows.

Patented July 8, 1924. Q

EDWARD ZEMAN, or woonsrnn, New YORK.

swrrcn noon.

L all whom it may concern.

Be 1t known that I, EDWARD ZEMAN, a

citizen of the United States, residing at ..Woodside, county ofQueens, State of New York, have made a certain newand useful Invention in Switch'Locks, of which the following is a specification. 1

3 This invention relates to a new and useful improvement in an electricswitch and more particularly toan electric switch in the form of a combinationlock, I

The object. of theinvention is to provide an electric switch for closing a circuit which can only be operated toqclose the circuit by a person who is familiar with the combination of contacts to which the terminals of the-electric wires are connected v A further object, offthe invention is to provide. a switchof this character; which is simple and inexpensive in construction and i which {may be ,used in! any place where it isdesired that the making and breaking of a an. electrical circuit should be under the con- .trol. of certain parties. only. i a 25,

.Other objects, of the invention will appear more fully hereinafter. r l V The invention consistsv substantially in the construction, combination, location and relative arrangementof parts, all as willbe more fully hereinafterset forth, as shownin the accompanying drawing and .finally pointed:0ut in theappended claims.

Referring to the accompanying drawing: I

Fig. '1 is an elevation of the front face of the device. A

Fig. 2 isa central verticallongitudinal sectional view of same on the line 22 of Fig. 1.

. v Fig.1 3. isa: sectional view taken on the line 3-3 of Fig. 2 looking inthe direction 'Fig.. 4 is anelevation ,the 'front face switch Y arms.

.ofthecontact plate showing two of the Fig. .5 isa d ail setioiin view- Showing .Referring specifically to the drawing, -1

designates asuitable housing whichincloses the. switch mechanism in any suitable manner.v 7

. ,The switch structureproperis composed of the contact plate 2. and the top plate 7. ,Thecontact'plate 2 is made of bakelite or Luther suitable insulated inaterial and is to the inner end separated or spaced from the top plate by means of a plurality of posts 8 which are secured to the'contact plate andtop plate in any suitable manner.

The inner face of the contact plate 2 has a series of indentations 3 provided therein. These indentations are preferably arranged in a circle and there are three rows of the same.

At predetermined pointson the contact plate contact points are placed in these indentations and are maintained therein by means of binding posts to which said contact points are secured. These binding posts are indicated at 10, 11, 12, 13, in Fig. 2.

The wire s 5 and 6 and 6 of the circuit to be operated by the switch are adapted to be secured to said binding posts ,"wires 5 being 'adapted to be secured to certain of the posts and wires 6 andfi to certain other of these posts, as will bejmo're fully explained hereinafter. i "f Rot-atably mounted in the top plate 7 is theshaft9. Secured to the outer end'ofthis shaft is the dial l4 and knob Secured of said shaft is the contact arm16.

,Thetop plate is alsoprovided with ex tensions lit-which. are provided with openings 18. adapted to" receive bolts or other suitable fastening means-for securing the switch to the'place wherever it is to be used.

The dial .14 mounted onthe shaft 9 has a series of numbers indicated thereon which are arranged to correspond with the num- .ber of indentationsarranged in three circles on the contact plate.

The contact arm 1 6 secured to the shaft 9 v has secured to it at its free end an insulated contact mounting 19 which has two spring maintained contact points 20 and 211 The method of mounting these contact points in the saidmountingis shown in Fig. 5. The

.contactmounting 19 may be secured'to the contact arm,16 in any suitable manner, such as,- for instance, by means of a, screw 22. ;The contact points 20. and 21 are adapted to register with the middle row of indentations insaid contact plate.

Rigidly-fmounted in the contact plate 2 is a shaft- 23 which-issecured thereto in any suitable manner, such as by a@ nut 24. Rotatably mounted on said shaft 23 are two contact arms 25 and 26. The free: ends of vthese contact arms are bent so new form contact points to engage with the indentations ,onthe contact plate 2. The contact 'arm 26 is shorter than the contact arm 25 and the contact point of this arm'engages' the inner circle of indentations 3 on'the contact plate. The contact point of the arm 25 engages the outer indentations on the contact plate. The contact arm 26 is of such length that the contact arm 16 may be revolved by the shaft 9 and the contact mounting" 19 will pass the said contact arm 26 withoutinterfering with the same. 7

At predetermined points inthethree circular rows of indentations in the contact plate',-thereisinserted throughthe plate, at the point where an I indentation occurs, a contact pin. One pin, for instance, is placed at 27 in the outer row of indentations; two pinslare placed at-28 in the middle row of indentations, and one pin is placed at 29 inv the. inner row. These pins are secured to and maintained in place by means of the binding posts 13, 12, 11 and as shown in Fig. 2-.

Secured tothe. binding post 10 is a wire 5 leading to the electric current supply to be controlled, which: may be the positive lead of said circuit. Secured to the binding post 12Iis' the Wire 6 which may be the negative lead for said circuit. The binding posts 11 and 13 are connected to wires leading to the apparatus to be controlled by the electric circuit such as for instance a bell, as shown in Fig. 2. 7

From the above description it will .be seen that when'the contact points of arms 16, and 26 coincide with the contact pins 28, 29 and 27, the circuit is closed and the circuit may be employed for whatever purpose it is designed to be used. .If any one of the contacts is out of engagement with its respective contact pin the circuit is broken and the electrical supply cut ofi.

operation the switch operates as follows:

The dial 10, as above stated, is provided with numbers on the face thereof which cor- ,r'e's po nd' to' the number of indicationsin the contactplate 2. The contact pin 29, for instance,- is inserted through the contact plate at a point on the inner circle of indentations whichcorresponds with the number 29.011 the'diah The contact point 27 is the contact plate at a point on the: outer circle of indentations which corresponds to the number 27 on the dial,

and; the contact points 28 are inserted "through the contact plateat points in the circle of ihdentations which correspond tothe number 28 on the dial.

By'revolving the dial in one direction, say 'totlie1e'ft, tlie contact arm 16 is also caused ,to be revolved and the contact mounting 19 secured tothe contact arm 16 is caused'to abut against and carrywith it the Canaan arm 25 mounted on the shaft 23. The contact arm 25, in being carried along by the contact mounting 19 of arm 16, picks up and carries with it the contact arm26.

The dial is rotated until the number 29 coincides with the marker on the dial and at that point the contact arm 26 is in en-.

the dial, at which point the contact p oint of said arm is in engagement with the eontact pin 27 in the contact plate 2. The dial is then rotated in the opposite direction again until the contact points of the contact mounting 19 coincide and register with the contact pins 28 in the contact plate.

This point is reached when the dial has. been rotated until the number 28 coincides with themarker on the dial. The circuit is then closed andready to function.

It will be seen that a combination of three numbers corresponding to the positionof the contact .pins in the contact plate must be known to the person who. desires-to put the circuit in condition for functioning and it is im ossible for anyone to'close the circuitv uni ess they are acquainted with the combination.

A switch of this character has many desirable uses and may be employedfor con trolling the ignition circuit of automobiles, for electric locks or for controlling the lighting system of a house, etc. 7 V i p i A preferred embodiment of the invention has been shown, but it will be understood that various'changes and modifications may be-made without a departure from the spirit and scope of the invention as claimed hereinafterf Having fully described my invention, what I claim as" new and desire to secure by Letters Patent is: V

1. An electric switch comprising a" pair of spaced plates, oneof said plates being formed of an'insulated material, concentric rows of indentations arranged on said insulated, plate, contacts forming. the terminals of an electric circuit arranged in certain of said indentations, a shaftsec'ured tosaid insulated plat ga plurality of contact arms rotatably secured to said shaft and adapted to engage certain of said contacts, the other of said plates having a shaft rotatably secured therein, a contact arm secured thereto,

spaced plates, one of said plates being formed of an insulated material, concentric rows of indentations arranged on said insu-- lated plate, contacts forming the terminals of an electric circuit arranged in each of said rows of indentations, a shaft secured to said insulated plate, two contact arms rotatably secured to said shaft, one of said contact arms adapted to engage the contacts in one of said rows of indentations and the other of said contact arms adapted to engage the contacts in another of said rows of indentations, the other of said plates having a shaft rotatably secured therein, a contact arm secured thereto and adapted to engage the contacts in another row of said indentations, means secured to said shaft for rotating said last mentioned contact arm, and means secured to said contact arm for engaging with and actuating the contact arms on said insulated plate.

3. An electric switch comprising a pair of spaced plates, one of said plates being formed of an insulated material, concentric rows of indentations arranged on said insulated plate, contacts forming the terminals of an electric circuit arranged in each of said rows of indentations, a shaft secured to said insulated plate, two contact arms rotatably secured to said shaft, one of said contact arms adapted to engage the contacts in one of said rows of indentations and the other of said contact arms adapted to engage the contacts in another of said rows of indentations, the other of said plates having a shaft rotatably secured therein, a contact arm secured thereto and adapted to engage the contacts in another row of said indentations, means secured to said shaft for rotating said last mentioned contact arm, means secured to said contact arm for engaging with and actuating the contact arms on said insulated plate, a cover for said switch, and means on said last mentioned plate for securing the switch to a support.

4. An electric switch comprising a supporting plate and an insulated plate, means for spacing said plates apart, concentric rows of indentations arranged on said insulated plate, contacts forming the terminals of an electric circuit arranged in each row of said indentations, a shaft secured to said insulated plate, two contact arms rotatably secured to said shaft and adapted to engage certain rows of indentations and said contacts contained therein, one of said contact arms being shorter than said other contact arm, a shaft rotatably mounted in said supporting plate. a contact arm mounted on said shaft and rotating therewith, a contact mounting mounted on said contact arm, a pair of contact pins arranged in said mounting, and adapted to engage with contacts arranged in a third row of indentations in said insulated plate, means for rotating said shaft, means for rotating the contact arms on said insulated plate when said shaft is rotated, and means for regulating the rotation of each individual contact arm so as to cause the same to engage with or disengage from the contacts in said indentations.

5. An electric switch comprising a supporting plate and an insulated plate, means for securing said plates in spaced relation with each other, concentric rows of indentations arranged on said insulated plate, contacts forming the terminals for wires of an electric circuit arranged at predetermined points in said indentations, a contact arm for each of said concentric rows of indentations, one of said arms being adapted to engage the other of said contact arms to thereby -move said arms independently one of the other for engaging the contact points at their prearranged points.

In testimony whereof I have hereunto set my hand on this 12th day of June, A. D. 1923.

EDWARD ZEMAN.