Impulse relay

Claim 2

An impulse relay including a coil unit, cam follower and contact-carrying arms, an armature spring urged outwardly away from the outer end of the coil unit so upon energization of the coil unit the armature is drawn toward the coil unit against the restraining force of the spring, a cam and ratchet wheel assembly mounted for rotation about a common axis and located outwardly of the coil unit, said armature having portions extending in the space between the cam and ratchet wheel assembly, on the one hand, and said coil unit on the other hand, and terminating in transversely outwardly extending pawl carrying portion, said pawl carrying portion including a pawl-forming extension projecting toward the outer side of said cam and ratchet wheel assembly, said cam and ratchet wheel assembly including cam means and ratchet wheel means, said ratchet wheel means being engaged by said pawl-forming extension when said coil unit is energized, and when said coil unit is energized said cam means being engaged by said cam follower arms to effect opening and/or closing of contacts carried thereby as said cam and ratchet wheel assembly is rotated, said armature also having a transversely outwardly extending locking dog-forming portion which, when the coil unit is de-energized, engages a portion of the cam and ratchet wheel sub-assembly to hold the same against rotation until the pawl is drawn to said coil unit, said pawl-forming extension being formed on a member flexibly secured to said pawl carrying portion of said armature, said member including in addition to said pawlforming extension an overshoot preventing dog-forming extension projecting towards said cam and ratchet wheel sub-assembly on the outer side thereof, said overshoot preventing the dog-forming extension engaging a portion of said cam and ratchet wheel assembly to stop further rotation thereof after a given amount of rotation is imparted to the ratchet wheel means by said pawlforming extension upon energization of the coil unit.

Claim 3

The impulse relay of claim 1 wherein said armature also has a transversely outwardly extending locking dog-forming portion which, then the coil unit is de-energized, engages a portion of the cam and ratchet wheel sub-assembly to hold the same against rotation until the pawl is drawn to said coil unit.

Claim 4

The impulse relay of claim 1 wherein said pawl-forming extension is formed on a member flexibly secured to said pawl carrying portion of said armature, said member including in addition to said pawl-forming Extension an overshoot preventing dog-forming extension projecting towards said cam and ratchet wheel sub-assembly on the outer side thereof, said overshoot preventing dog-forming extension engaging a portion of said cam and ratchet wheel assembly to stop further rotation thereof.

Claim 5

The impulse relay of claim 1 wherein said cam and ratchet wheel assembly confronts the marginal end portion of the coil unit on the side thereof where said transversely outwardly extending pawl-carrying portion of the armature is located.

Claim 6

An impulse relay comprising a frame having a main support wall on which a coil unit is supported and from which outwardly extend a pair of spaced confronting transversely extending end walls, a cam follower and contact-carrying arm sub-assembly mounted on one of said transversely extending end walls and having contact carrying and cam follower-forming arms extending in the direction of the other transversely extending end wall, an armature mounted on said one transversely extending end wall and spring urged away from the outer end of the coil unit so upon energization of the coil unit the armature is drawn toward the coil unit against the restraining force of the spring, a cam and ratchet wheel sub-assembly mounted on said other transversely extending end wall and for rotation about an axis extending generally parallel to said main and transversely extending walls, and located beyond the outer end of the coil unit in a direction parallel to said transversely extending end walls, said armature having portions extending in the space between the cam and ratchet wheel sub-assembly, on the one hand, and said coil unit, on the other hand, and terminating in a transversely extending pawl carrying portion, said pawl carrying portion carrying a pwal-forming extension projecting toward said cam and ratchet wheel sub-assembly on the side thereof remote from said main support wall, said cam and ratchet wheel sub-assembly including cam means and ratchet wheel means engaged by said pawl-forming extension when said coil unit is energized, said cam means being engaged by said cam follower-forming arms of said follower and contact carrying arm assembly when said coil unit is energized to effect opening and closing of contacts carried thereby as said cam and ratchet wheel assembly is rotated, said armature also having a transversely outwardly extending locking dog-forming portion which when the coil unit is deenergized engages a portion of the cam and ratchet wheel sub-assembly to hold the same against rotation until the pawl is drawn to said coil unit, and said pawl-forming extension being formed on a member flexibly secured to said pawl carrying portion of said armature, said member including in addition to said pawl-forming extension an overshoot preventing dog-forming extension projecting towards said cam and ratchet wheel sub-assembly on the outer side thereof, said overshoot preventing dog-forming extension engaging a portion of said cam and ratchet wheel assembly to stop further rotation thereof after a given amount of rotation is imparted to the ratchet wheel means by said pawl-forming extension upon energization of the coil unit.

Claim 7

An impulse relay comprising a frame having a main support wall on which a coil unit is supported and from which outwardly extend a pair of spaced confronting transversely extending end walls, a cam follower and contact-carrying arm sub-assembly mounted on one of said transversely extending end walls and having contact carrying and cam follower-forming arms extending in the direction of the other transversely extending end wall, an armature mounted on said one transversely extending end wall and spring urged away from the outer end of the coil unit so upon energization of the coil unit the armature is drawn toward the coil unit against the restraining force of the spring, a cam and ratchet wheel sub-assembly mounted on said other transversely extending end wall and for rotation about an axis extending generally parallel to said main and transversely extending walls, and located beyond the outer end of the coil unit in a direction parallel to said transversely extending end walls, said armature having portions extending in the space between the cam and ratchet wheel sub-assembly, on the one hand, and said coil unit, on the other hand, and terminating in a transversely extending pawl carrying portion, said pawl carrying portion carrying a pwal-forming extension projecting toward said cam and ratchet wheel sub-assembly on the side thereof remote from said main support wall, said cam and ratchet wheel sub-assembly including cam means and ratchet wheel means engaged by said pawl-forming extension when said coil unit is energized, said cam means being engaged by said cam follower-forming arms of said follower and contact carrying arm assembly when said coil unit is energized to effect opening and closing of contacts carried thereby as said cam and ratchet wheel assembly is rotated, said armature also having a transversely outwardly extending locking dog-forming portion which when the coil unit is deenergized engages a portion of the cam and ratchet wheel sub-assembly to hold the same against rotation until the pawl is drawn to said coil unit, and said pawl-forming extension being formed on a member flexibly secured to said pawl carrying portion of said armature, said member including in addition to said pawl-forming extension an overshoot preventing dog-forming extension projecting towards said cam and ratchet wheel sub-assembly on the outer side thereof, said overshoot preventing dog-forming extension engaging a portion of said cam and ratchet wheel assembly to stop further rotation thereof after a given amount of rotation is imparted to the ratchet wheel means by said pawl-forming extension upon energization of the coil unit.

Claim 8

An impulse relay comprising a frame having a main support wall on which a coil unit is supported and from which outwardly extend a pair of spaced confronting transversely extending end walls, a cam follower and contact-carrying arm sub-assembly mounted on one of said transversely extending end walls and having contact carrying and cam follower-forming arms extending in the direction of the other transversely extending end wall; an armature mounted on said one transversely extending end wall and spring urged away from the outer end of the coil unit so energization of the coil unit the armature is drawn toward the coil unit against the restraining force of the spring; a cam and ratchet wheel sub-assembly mounted on said other transversely extending end wall and for rotation about an axis extending generally parallel tO said main and transversely extending walls, and located beyond the outer end of the coil unit in a direction parallel to said transversely extending end walls, said armature having portions extending in the space between the cam and ratchet wheel sub-assembly, on the one hand, and said coil unit, on the other hand, and terminating in transversely extending pawl carrying and locking dog-forming portions, said pawl carrying portion having secured thereto a flexibly mounted member having a first pawl-forming extension projecting toward said cam and ratchet wheel sub-assembly on the side thereof remote from said main support wall and an overshoot preventing dog-forming extension projecting toward said cam and ratchet wheel assembly on the latter said of the assembly; said cam and ratchet wheel sub-assembly including cam means, ratchet wheel means and locking dog wheel means, said ratchet wheel means being engaged by said pawl-forming extension when said coil unit is energized, and by said overshoot preventing dog-forming extension when said coil unit is energized after a given amount of rotation is imparted to the ratchet wheel means, said locking dog wheel means being engaged and held by said locking dog-forming portion of said armature when said coil unit is deenergized, and said cam means being engaged by said cam follower-forming arms of said follower and contact carrying arm sub-assembly when said coil unit is energized to effect opening and closing of contacts carried thereby as said cam and ratchet wheel assembly is rotated.

Claim 9

An impulse relay comprising a frame having a main support wall on which a coil unit is supported and from which outwardly extend a pair of spaced confronting transversely extending end walls, a cam follower and contact-carrying arm sub-assembly mounted on one of said transversely extending end walls and having contact carrying and cam follower-forming arms extending in the direction of the other transversely extending end wall; an armature mounted on said one transversely extending end wall and spring urged away from the outer end of the coil unit so energization of the coil unit the armature is drawn toward the coil unit against the restraining force of the spring; a cam and ratchet wheel sub-assembly mounted on said other transversely extending end wall and for rotation about an axis extending generally parallel tO said main and transversely extending walls, and located beyond the outer end of the coil unit in a direction parallel to said transversely extending end walls, said armature having portions extending in the space between the cam and ratchet wheel sub-assembly, on the one hand, and said coil unit, on the other hand, and terminating in transversely extending pawl carrying and locking dog-forming portions, said pawl carrying portion having secured thereto a flexibly mounted member having a first pawl-forming extension projecting toward said cam and ratchet wheel sub-assembly on the side thereof remote from said main support wall and an overshoot preventing dog-forming extension projecting toward said cam and ratchet wheel assembly on the latter said of the assembly; said cam and ratchet wheel sub-assembly including cam means, ratchet wheel means and locking dog wheel means, said ratchet wheel means being engaged by said pawl-forming extension when said coil unit is energized, and by said overshoot preventing dog-forming extension when said coil unit is energized after a given amount of rotation is imparted to the ratchet wheel means, said locking dog wheel means being engaged and held by said locking dog-forming portion of said armature when said coil unit is deenergized, and said cam means being engaged by said cam follower-forming arms of said follower and contact carrying arm sub-assembly when said coil unit is energized to effect opening and closing of contacts carried thereby as said cam and ratchet wheel assembly is rotated.

Claim 10

In an impulse relay including a coil unit, an armature movable toward and away from the coil unit as the latter is energized and de-energized, cam follower and contact-carrying arm means for effecting contact opening and closing operations when said coil unit is energized and/or de-energized, an assembly of rotatably mounted cam means upon which the cam follower arm means ride and rotatably mounted ratchet wheel means engagable by a pawl operated by said armature to effect incremental rotation of said cam means, the improvement in the support and arrangement of said ratchet wheel means and cam means comprising spaced confronting bearing-forming walls providing a rotatable support for said ratchet wheel means and cam means, said ratchet wheel means and cam means being formed by at least two separate members mounted together for relative axial movement and rotation about a common axis, spring means urging the ratchet wheels and cam-forming members axially apart where they are collapsible against the restraining force of said spring means to reduce the overall axial extend thereof, said spring urged assembly of said cam and ratchet wheel-forming members when in a collapsed condition being insertable between said confronting bearing-forming members, said cam and ratchet wheel-forming members and said confronting pivot-forming members having means which telescopingly engage when the collapsing pressure on said assembly is removed and said members assume their outermost positions relative to one another.

Claim 11

In an impulse relay including a coil unit, an armature movable toward and away from the coil unit as the latter is energized and de-energized, cam follower and contact-carrying arm means for effecting contact opening and closing operations when said coil unit is energized and/or de-energized, an assembly of rotatably mounted cam means upon which the cam follower arm means ride and rotatably mounted ratchet wheel means engagable by a pawl operated by said armature to effect incremental rotation of said cam means, the improvement in the support and arrangement of said ratchet wheel means and cam means comprising spaced confronting bearing-forming walls providing a rotatable support for said ratchet wheel means and cam means, said ratchet wheel means and cam means being formed by at least two separate members mounted together for relative axial movement and rotation about a common axis, spring means urging the ratchet wheels and cam-forming members axially apart where they are collapsible against the restraining force of said spring means to reduce the overall axial extend thereof, said spring urged assembly of said cam and ratchet wheel-forming members when in a collapsed condition being insertable between said confronting bearing-forming members, said cam and ratchet wheel-forming members and said confronting pivot-forming members having means which telescopingly engage when the collapsing pressure on said assembly is removed and said members assume their outermost positions relative to one another.

Claim 12

The impulse relay of claim 7 wherein one of said members of said assembly is an axially extending projection slidably received within a slot in the other of same, so that when the assembly is in its collapsed condition said axially extending projection extends to a greater degree within said slot.

Claim 13

The impulse relay of claim 7 wherein said assembly of said cam and ratchet-forming members comprise a central ratchet wheel-forming member positioned between a pair of outermost cam-forming members, said central ratchet wheel-forming member having means interconnecting with each of said cam-forming members to permit relatively axial movement therebetween, said spring means urging said ratchet wheel-forming member and each of said cam-forming members apart and permitting the collapsing of the assembly to reduce the overall axial extent of the assembly to enable the insertion thereof between said bearing-forming members.

Claim 14

The impulse relay Of claim 9 wherein there is formed as an integral part of one of said cam-forming members a locking wheel against which a locking dog is urged to hold the same against rotation when the coil unit is in a de-energized state, said locking dog being withdrawn from said locking where when the coil unit is energized.