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Surveying Instrument.

Description: Patent for new and improved surveying instrument for use "in calculating the distance between the point of 'setting up' and the target, without the use of the usual linear chain" (lines 12-15). Illustration and instruction included.
Date: March 7, 1916
Creator: Adams, J. S.
Item Type: Refine your search to only Patent

Cotton-Chopper.

Description: Patent for a content chopping device with an adjustable lever and cutters. The cotton chopper can be attached to different cultivator frames (farm equipment) and adjusted to chop or thin out different rows of cotton stalks (or other plants).
Date: March 23, 1915
Creator: Adams, Joe B. & Miller, Lawrence M.
Item Type: Refine your search to only Patent

Railway-Crossing

Description: Patent for crossings for railway tracks and particularly to means for closing the cut in the rails made for the flanges of the wheels, and the object is to provide sliding members which can be easily operated to close the slot or cut in the crossing rails for the flanges of the wheels so that a continuous tread will be formed for every wheel that passes over the crossing and to provide a mechanism for the tracks.
Date: March 30, 1909
Creator: Adams, Powell O.
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Tractor

Description: Patent for an improved tractor where the "propelling force is delivered through traction blocks...(lines 11-12)."
Date: March 22, 1921
Creator: Aerl, Van Vivian
Item Type: Refine your search to only Patent

Broom or Brush

Description: Patent for metal brooms or brushes that are "strong and durable, relatively light in weight, and can be inexpensively manufactured" (line 13-15). It is intended for "sweeping snow, mud, slush, and the like" (line 16-17). The patent can also be applied for smaller version of metal brooms or brushes for other purposes.
Date: March 16, 1915
Creator: Airhart, Noah S.
Item Type: Refine your search to only Patent

Hydraulic Classifier.

Description: Patent for hydraulic classifier for the treatment of ore. The invention subjects settling solid particles to a secondary classification and prevent the contamination of the settling solids before they are discharged.
Date: March 21, 1922
Creator: Allen, Charles
Item Type: Refine your search to only Patent

Thickener (Sewage Type).

Description: Patent for sewage thickener that relies on sewage solids to sink to the bottom of the sewer and fall into the thickener, in which the thickener will press the solid sewage into a pulp. The pulp will be pressed at a predetermined density, and then the pressed pulp will float to the top of the sewage to be removed. The separation of liquid and solid sewage was predicted to prevent overflow.
Date: March 11, 1920
Creator: Allen, Charles
Item Type: Refine your search to only Patent

Switch.

Description: Patent for a switch mechanism for use on railroads. The switch can be installed without cutting the railroad tracks. Instructions and illustrations are included.
Date: March 20, 1917
Creator: Allen, Gus V.
Item Type: Refine your search to only Patent

Bridle Bit.

Description: Patent for a new and improved bridle bit. This design "consist[s] of curb-plates provided with the mouth-bar and having the upper ends provided with slots and the lower ends formed with longitudinal slots, and the cheek-plates loosely fitted to the outer ends of the mouth-bar and having their opposite ends formed with openings for the attachment of the head-stall and reins" (lines 72-79).
Date: March 11, 1890
Creator: Allen, John Hudson
Item Type: Refine your search to only Patent

Toboggan-Slide.

Description: Patent for a toboggan slide for use in amusement parks that is easily taken up and down and includes guard rails and ant-friction devices to help guide the toboggan down the slide. It also provides a method of easily moving toboggans from one slide to another.
Date: March 19, 1907
Creator: Allen, Orcenith F.
Item Type: Refine your search to only Patent
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