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Account-Book.

Description: Patent for a new and improved account book that is arranged to improve accuracy of record-keeping and facilitate the referencing of different accounts.
Date: June 13, 1916
Creator: Zimmerman, Charles Levy
Item Type: Refine your search to only Patent

Acetylene-Gas Generator.

Description: Patent for an improved acetylene-gas generator "which is kept in a relatively-cool condition by a surrounding bath of water and which generator is removable at will from the floatable bell of the tank. A further object is to prevent the waste carbid from dropping into the water of the expansible tank and to provide for the free discharge of gas from the generator [...] while [...] permitting the expeditious removal of said generator for the purpose of cleaning and recharging" (lines 13-24).
Date: June 19, 1900
Creator: Lindholm, Charlie M.
Item Type: Refine your search to only Patent

Acetylene-Gas Generator.

Description: Patent for an acetylene-gas generator that consists of “a suitable frame, a receptacle positioned within said frame, and a gas-bell” (lines 11-13), as well as a gasometer and carbide feed. As a result, the gas generator “will continually furnish dry, cool gas and at a substantially even pressure at all times” (line 22-24). Illustrations included.
Date: June 4, 1907
Creator: Hays, Parx Orr
Item Type: Refine your search to only Patent

Adding-Machine

Description: Patent for "a simple, cheap, and efficient device of this character which may accomplish with facility and case all the purposes for which it is intended" (lines 13-16).
Date: June 7, 1892
Creator: Wright, Joseph W.
Item Type: Refine your search to only Patent

Adding-Machine

Description: Patent for "an adding-machine which, while being constructed of but comparatively few parts, will be so adjusted as arranged as to allow an operator to make rapid and correct calculations; furthermore, to produce an adding-machine in which the operator will be enabled to detect immediately any mistake which he may have made, and, finally, to produce a simple, efficient, and effective adding-machine" (lines 13-22).
Date: June 25, 1889
Creator: Stinson, James C.
Item Type: Refine your search to only Patent

Adjusting Device for Compressing-Rolls.

Description: Patent for adjusting devices for compressing rolls which “employed for compressing into a continuous thin sheet cotton fiber; and the objects in view are to provide a simple and convenient means for binding the rolls in contact, and when so bound to prevent any undesired yielding.” (Lines 10-15) Illustration is included.
Date: June 16, 1891
Creator: Goldthwaite, Joseph G.
Item Type: Refine your search to only Patent

Aeroplane.

Description: Patent for improved propulsion for airplanes involving propellors in the front and rear of the plane. This aids in regulating air currents to stabilize flight, landing and speed. The patent includes illustrations.
Date: June 12, 1917
Creator: Campbell, John R.
Item Type: Refine your search to only Patent

Airship

Description: Patent for an airship that is equipped with gas bags to control the ascent and descent of the airship and make it float in case of landing in the water.
Date: June 11, 1912
Creator: Bradshaw, John F. W.
Item Type: Refine your search to only Patent

Alarm Attachment for Electric Bells.

Description: Patent for "an Alarm Attachment for Electric Bells." "The object in view is the provision of means for facilitating the change of an ordinary door-bell into a continuously-ringing alarm apparatus, while leaving the mechanism free to be changed back into its former operative condition as a door-bell."(Lines 10-15) Including illustrations and instructions.
Date: June 30, 1902
Creator: Blakeney, Henry
Item Type: Refine your search to only Patent
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