US2716206A

US2716206A - Assignment cancelling circuit

Info

Publication number: US2716206A
Application number: US282547A
Authority: US
Inventors: Octavio M Salati
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-04-16
Filing date: 1952-04-16
Publication date: 1955-08-23
Anticipated expiration: 1972-08-23

Description

Aug. 23, 1955 o. M. SALATI 2,716,206

ASSIGNMENT CANCELLING CIRCUIT Filed April 16, 1952 INVENTOR.

OCTAVIO M. SALATI Affomey United States Patent ASSIGNMENT CANCELLING CIRCUIT Application April 16, 1952, Serial No. 282,547

1 Claim. (Cl. 317-137) This invention relates to a circuit arrangement includ ing a plurality of magnetic relays and having means associated therewith for energizing one of said relays and simultaneously de-energizing the remainder of said relays.

This invention will be more clearly understood by reference to the drawing wherein the figure shown represents a preferred embodiment thereof. The circuit arrangcment shown has four magnetic relays a, b, c and d. Like parts throughout the drawing and specification will be designated by like numerals plus the suffix a, b, c or d to identify the part with its associated relay. Each relay has a set of break-before-maltc leaves consisting of a pair of stationary leaves and 12 and a main leaf 14, and a set of make-before-break leaves consisting of a stationary leaf 20, a main leaf 22, and a secondary leaf 24. Also associated with each of said relays is a grounded armature 30 having an associated resistance 32. The break-before-make leaves are connected in a series arrangement while the make-beforebreak leaves are connected in a parallel arrangement. The output from each armature is generally taken between the terminals 34 and ground 36 of the respective relays. A grounded power supply 40 is provided to hold the relays a, b, c or d in position once they are actuated.

The circuit arrangement shown may further be considered to have associated with each relay a locking circuit and an actuating circuit.

The actuating circuit of each relay may be seen to consist of its associate grounded armature 30 and leaves 7.0, and 24 of its associated set of make-before-break leaves. Each actuating circuit is energized through 1111 external signal source 50. The locking circuit of each relay may be considered to include its associated grounded armature 30 the secondary and main leaves 24 and 22 of its associated set of make-before-break leaves, the main leaf 14 and the stationary leaf 12 of its associated set of break-before-make leaves, the main leaves 14 and the stationary leaves 10 of the remaining sets of break-beforemake leaves, and the common grounded power supply 40.

The operation of the circuit will be explained in particular with reference to relays a and b. The original state of operation will be assumed to be indicated by the solid line representation. That is, relay b actuated, all other relays unactuated. Assuming now that relay :1 is actuated by a pulse through terminal 50a, the relays a and b will take the positions shown by the dashed lines. First the actuating circuit of relay a will be actuated through armatures 30a, leaves a and 24a, and; the signal source supplied through terminal 50a. This will cause the

main leaves

14a and 22a (since they are physically connected as by insulated bar 60) of relay a to be pulled down and held in the position shown by the dashed lines, thereby breaking the actuating circuit of relay a since contact between secondary leaf 20a and main leaf 24a may no longer exist, and simultaneously unlocking relay b since the momentary opening be 2,716,206 Patented Aug. 23, 1955 tween leaves Illa and 14a (until leaf 14a contacts leaf 12a) opens the locking circuit of relay b thus allowing relay b to take the position shown by the dashed lines.

Further analysis of the circuit will disclose that only one relay of the above circuit arrangement may be locked at any one time, and by an explanation similar to that given above with reference to relays a and energization of any actuating circuit associated with a relay will cause that relay to be locked in and any previously locked relay to be unlocked. It may also be seen that any number of relays may be arranged in the manner disclosed, the only provision being that each relay added have associated therewith an armature, and a set of make-before-break and break-before-make leaves similar to those associated with relays a, b, c and d herein described. It should be noted that the

main leaves

14a and 22a of initial relay a" are electrically connected as well as physically coupled, while the main leaves of each of the remaining relays are not electrically connected but are physically coupled so that they must move together.

A particular advantage of the circuit arrangement herein dscribed is that, as more relays are added, the number of leaves associated with each relay remains the same; thus additional relays may be added at any time without disturbing any of the other relays in the arrangement other than the last relay to which the new relay is to be connected. Even this latter disturbance, if any, is nil.

While there have been described what at present are considered to be preferred embodiments of the invention, it will be understood by those skilled in the art that various changes and modifications may be made herein without departing from the invention and it is therefore aimed in the appended claim to cover all such modifications as fall within the spirit and scope of the invention.

What is claimed is:

A circuit arrangement comprising a plurality of magnetic relays each having a two terminal coil, and each having a set of break-before-make leaves comprising first and second fixed leaves and a first movable main leaf between said two fixed leaves, and a set of makebeforebreak leaves comprising a second movable main leaf, a movable secondary leaf and a third fixed leaf between said second movable main leaf and said secondary leaf, said first fixed leaf being in contact with said first main leaf and said third fixed leaf being in contact with said secondary leaf when said coil is not energized, and said second fixed leaf being in contact with said first main leaf and said secondary leaf being in contact with said second main leaf when said coil is energized, the first and second fixed leaves of each relay being connected together and also connected to the first main leaf of the next succeeding relay of said plurality of relays, the second main leaf of the first of said relays being connected to the first main leaf of said first relay and to the second main leaf of each succeeding relay of said plurality of relays, the secondary leaf of each relay being connected to one terminal of its coil, the other terminal of each coil being grounded, the third fixed leaf of each relay being connected to a separate source of relay energizing potential respectively, and the first and second fixed leaves of the last relay of said plurality of relays being connected to a source of holding voltage.

References Cited in the file of this patent UNITED STATES PATENTS 2,250,923 Weld July 29, 1941 2,322,563 Bruno June 22, 1943 2,413,741 Young Jan. 7, 1947 2,593,578 Liberg Apr. 22, 1952