UNT Libraries Government Documents Department - 8 Matching Results

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Tube-Expander

Patent for a tube expander for setting boiler tubes in the holes in the tube-sheet, which provides simplicity and improvement of its construction.

Date: June 17, 1919

Creator: Walsh, Emmet

Item Type: Patent

Door Controlled Electric Switch

Patent for an improved switch attachment that will allow a room, vault, or compartment to be kept lighted when door is open or closed, but may also be shut off when leaving the room.

Date: October 17, 1916

Creator: Kreter, Otto

Item Type: Patent

Lock for Automobiles

Patent for Lock for Automobiles

Date: October 17, 1916

Creator: Harris, Robert M. & Wade, Milton V.

Item Type: Patent

Combination Tie and Rail-Joint

Patent for improvement in the safety of tie and rail-joints. Improves the connection so that independent movement of the tie and rail is reduced.

Date: November 17, 1914

Creator: Knaus, John J.

Item Type: Patent

Permutation-Lock.

Patent for a device of a permutation lock. One of its objects is to improve the permutation mechanism thereof and to provide novel means whereby the combination of the lock may be changed.

Date: November 17, 1914

Creator: Meepos, Max

Item Type: Patent