John David Foster
Landscape Architect at Brockton Dr, Indianapolis, IN

4305612, Dec 15, 1981

Jul 24, 1978

5/927100

Larry R. Hunt - Indianapolis IN
John R. Foster - Indianapolis IN

Von Duprin, Inc. - Indianapolis IN

E05C 1300

2923363

An apparatus for operating a door-latching and -unlatching device includes a thumbturn, a barrel cam, a shaft for coupling the thumbturn to the barrel cam to cause rotation of the barrel cam in response to movement of the thumbturn, a follower for the barrel cam and apparatus attaching the follower to the latch bolt to cause the latch bolt to move in response to actuation of the barrel cam. The illustrative barrel cam includes two generally diametrically opposed cam lobes such that rotation of the thumbturn either clockwise or counter-clockwise retracts the latch bolt. The follower includes a bar which lies against the cam surface of the barrel cam, and the latch bolt moving apparatus includes an actuator arm which is pivotally mounted adjacent one of its ends, the follower pin being mounted intermediate the actuator arm ends, the follower pin being supported adjacent the barrel cam, and the actuator arm further including a roller retractor actuator adjacent its other end.

4401330, Aug 30, 1983

May 13, 1981

6/263109

John R. Foster - Indianapolis IN
James E. Placke - New Palestine IN

Von Duprin, Inc. - Indianapolis IN

E05C 1500

292300

In the preferred embodiment depicted, the invention comprises a limb, having a depending lug, fixed to a door. The lug makes a close clearance, near engagement with a socket-retainer fixed to a door-interfacing mullion. The upper end of the mullion is foreshortened, and addressed to a free space; it is slidably engaged with an internal socket. Accordingly, in the event of fire, the mullion may freely extend vertically, due to the heat. Such free extension causes the socket-retainer, and the depending lug, mutually to engage. By this arrangement, the door is secured closed, on the exposure to severe heat, even if the normal latching and/or locking device therefor comes loose or disengaged. The method comprehends fixing the mullion at one end, securing it against angular movement, exposing the other end to a free space, and mounting to the closure and mullion locking components which come into engagement only in response to thermal extension of the mullion.

4466643, Aug 21, 1984

Aug 3, 1981

6/289756

Maksimilijan Godec - Indianapolis IN
John R. Foster - Indianapolis IN
Paul J. Straub - Indianapolis IN
Allan K. Mahler - Terre Haute IN

Von Duprin, Inc. - Indianapolis IN

E05C 1902

292 92

The dogging device comprises a detented dogging hook, for engaging a latching and unlatching control rod of a panic exit latch and actuator assembly, or a like assembly, and comprises means for selectively changing the operator-implements thereof from one type to another. The method comprises the steps of forming such a changeable dogging device. The kit sets forth the components parts cooperative with a basic dogging device for adapting the latter for use with any one of a plurality of operator-implements.

4427223, Jan 24, 1984

Aug 3, 1981

6/289757

Maksimilijan Godec - Indianapolis IN
John R. Foster - Indianapolis IN
Paul J. Straub - Indianapolis IN
Allan K. Mahler - Terre Haute IN

Von Duprin, Inc. - Indianapolis IN

E05C 1502, E05B 5504

292 92

The device comprises a latching assembly enclosed within, and translatable relative to, a centercase housing; the housing is mounted on a chassis. The device is adapted for cooperative engagement with a locking cylinder, for actuating the latching assembly, and for operation of a thumbpiece lift, by an ancillary, external, trim linkage, for translating the latching assembly. The latching device has a master, locking cylinder cam or dowel, the latter having a removable screw, which (through a locking cylinder) either operates a night-latch cam plate, to translate the latching assembly or, upon removal of the screw, allows the cam or dowel to translate a tumbler which, in turn, frees a thumbpiece lift, for operation (then) of the latching assembly by the lift, instead of by the cam plate. Accordingly, with the drive screw in place, the external, operating trim linkage can not operate the device; it must be unlatched, externally, by a key in the locking cylinder. With the drive screw removed, the use of a key in the locking cylinder will not unlatch the device, rather, in this circumstance, key-operation of the locking cylinder will enable the external trim linkage to unlatch the device, and such key-operation (with the drive screw removed) will also disable the trim linkage operation of the device, selectively.