Door control mechanism

Claim 2

A door control mechanism for securing a swinging door in a closed position, said mechanism comprising a shaft having a vertical axis of rotation, bearing members adjacent to opposite ends of said shaft adapted to rotatably connect said shaft to a swinging door with the shaft axis of rotation spaced from and parallel with the pivotal axis of the door, door operating means attached to the shaft for oscillating said shaft about its longitudinal axis, discrete latch members secured to said shaft adjacent to opposite ends thereof, discrete keeper members adapted to be secured to structure adjacent to opposite edge portions of a door that extends transversely to the pivotal axis of the door, said keeper members being engagable with said latch members, and a discrete security locking means connected to said shaft intermediate the means for oscillating said shaft about its longitudinal axis and an upper end of said shaft, said locking means including a security latch member pivotably secured to said shaft for lateral movement between latched and unlatched positions upon movement with said shaft and means for engaging said pivoted latch having a first base part secured to a structure adjacent a door and a second part movably secured to the first part to engage an end of the latch member to block lateral movement of the latch member and thereby prevent rotation of said shaft by said door operating means.

Claim 3

The door control mechanism of claim 1 wherein the means for engaging said pivoted latch member to prevent rotation of said shaft includes means to receive a padlock shackle or cable seal securable to structure adjacent a swinging door to which said shaft is securable and movable with said second part of said engaging means and including a shield portion spaced from and parallel with said adjacent structure, and extending to cover said receiving means and to limit access adjacent the security latch to the shackle or cable seal received by said receiving means.

Claim 4

The door control mechanism of claim 1 wherein the security locking means comprises a security latch member having a body portion secured to said pivotable shaft about an axis substantially parallel with said shaft, a keeper member adapted to be secured to structure adjacent an edge portion of a swinging door, a movable locking member adjacent the keeper member for selectively blocking movement of the security latch member, and means for limiting movement of said locking member.

Claim 5

The door control mechanism of claim 3 wherein the security locking means includes a guide member for engagement with the latch member and securable to the same swinging door and adapted to be positioned between said latch member body portion and the same swinging door for limiting pivotal movement of said latch member.

Claim 6

The door control mechanism of claim 3 wherein the locking member includes a pivoted part having first and second portions extending in substantially different directions, said first portion providing a surface for abutment with said latch member, said second portion providing an aperture to facilitate locking said pivoted part against rotation and said limiting means includes a stationary part adjacent said second portion when the first portion abuts the latch member and also having an aperture to facilitate locking said pivoted part.

Claim 7

The door control mechanism of claim 5 wherein each said second portion of said pivoted part and said limiting means includes a flange for limiting access to a member extending through said apertures.

Claim 8

A door control mechanism of claim 1 wherein the security locking means comprises a latch member connected to said shaft for pivotal movement at one end about an axis substantially parallel with but offset from the axis of said shaft, said latch member having a body portion, a keeper member having a base portion adapted to be secured to structure adjacent the edge of the door and a portion for engagement by said latch member, said base portion supporting the locking means thereon the means comprising a pivotable member for selectively obstructing the latch member from being unlatched upon rotation of the shaft, said pivotable member having an abutment portion for blocking movement of the latch member to an unlatched position, and a portion for positioning the member between an obstructing position and a non-obstructing position, said base portion having means for preventing the pivotable member from pivoting.

Claim 9

A door control mechanism of claim 7 wherein said second portion and said limiting means for preventing pivoting of the pivotable member each include an aperture alignable for receiving the padlock shackle or cable seal.

Claim 10

A door control mechanism for securing a swinging door in a closed position, said mechanism comprising a shaft having a vertical axis of rotation, bearing members adjacent to opposite ends of said shaft adapted to rotatably connect said shaft to a swinging door with the shaft axis of rotation spaced from and parallel with the pivotal axis of the door, door operating means attached to the shaft for oscillating said shaft about its longitudinal axis, discrete latch members secured to said shaft adjacent to opposite ends thereof, discrete keeper members adapted to be secured to structure adjacent to opposite edge portions of a door that extends transversely to the pivotal axis of the door, said keeper members being engagable with said latch members, and a discrete security locking means connected to said shaft intermediate the means for oscillating said shaft about its longitudinal axis and an upper end of said shaft, said locking means including a security latch member pivotably secured to said shaft for lateral movement between a latched position in which the pivoted latch member is parallel with the door and an unlatched position upon movement with rotation of said shaft and means for engaging said pivoted security latch member including a first part securable to a structure adjacent an edge of such a swinging door parallel with said shaft and a second part movable about an axis transverse to the plane of the door when closed, to engage an end of the latch member spaced from the shaft to block lateral movement of the latch member and thereby prevent rotation of said shaft by said door operating means, and including means to receive a padlock shackle or cable seal to prevent movement of said engaging means, said receiving means being securable to said structure and movable with said second part of said engaging means and including a shield portion spaced from and parallel with the plane of such a door when closed, extending to cover said receiving means and to limit access adjacent the security latch member to the shackle or cable seal received by said receiving means.

Claim 11

A door control mechanism for securing a swinging door in a closed position, said mechanism comprising a shaft having a vertical axis of rotation, bearing members adjacent to opposite ends of said shaft adapted to rotatably connect said shaft to a swinging door with the shaft axis of rotation spaced from and parallel with the pivotal axis of the door, door operating means attached to the shaft for oscillating said shaft about its longitudinal axis, discrete latch members secured to said shaft adjacent to opposite ends thereof, discrete keeper members adapted to be secured to structure adjacent to opposite edge portions of a door that extends transversely to the pivotal axis of the door, said keeper members being engagable with said latch members, and a discrete security locking means connected to said shaft intermediate the means for oscillating said shaft about its longitudinal axis and an upper end of said shaft, said locking means including a security latch member pivotably secured to said shaft for lateral movement between a latched position in which the pivoted latch member is parallel with the door and an unlatched position upon movement with rotation of said shaft and means for engaging said pivoted security latch member including a first part securable to a structure adjacent an edge of such a swinging door parallel with said shaft and a second part movable about an axis transverse to the plane of the door when closed, to engage an end of the latch member spaced from the shaft to block lateral movement of the latch member and thereby prevent rotation of said shaft by said door operating means, and including means to receive a padlock shackle or cable seal to prevent movement of said engaging means, said receiving means being securable to said structure and movable with said second part of said engaging means and including a shield portion spaced from and parallel with the plane of such a door when closed, extending to cover said receiving means and to limit access adjacent the security latch member to the shackle or cable seal received by said receiving means.