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Improvement in Seed-Planters.

Description: Patent for an improved seed-planter "which will deposit the seeds in the requisite quantities and proper distances apart, and which will cover and mark the bills, so that a plowman will not be at a loss where to start at the commencement of a new row, and after having passed around tree-stumps or other obstructions, as he can always see the marks on the preceding rows" (lines 16-23) with illustrations.
Date: December 21, 1869
Creator: Woods, David C.
Item Type: Refine your search to only Patent

Improvement in Gang-Plows.

Description: Patent for "a novel means of hanging the gang of plows beneath the draft-frame, in combination with levers and link-connections, whereby the plows can be adjusted to run at any desired depth, and firmly held after the adjustment." (Lines 18-23) Includes instructions and illustrations.
Date: December 21, 1875
Creator: McCormick, John R.
Item Type: Refine your search to only Patent

Improvement in Rotary Dredgers.

Description: Patent for an improved rotary dredging-machine operated by adjustment from the engine through gearing enabling the manipulation of "a heavier wheel than would otherwise be practicable" (lines 71-72) with illustrations.
Date: December 21, 1875
Creator: Hawley, Abel
Item Type: Refine your search to only Patent

Improvement in Sewing-Machine Thread-Guards.

Description: Patent for "a guard attachment to the Wheeler & Wilson sewing-machine for preventing the thread from being thrown off the tension by the work, and for preventing the thread from running off the spool onto the spindle." (Lines 6-11) Includes instructions and illustrations.
Date: December 21, 1875
Creator: Roosevelt, Lillian
Item Type: Refine your search to only Patent

Improvement in Ventilators.

Description: Patent for improvement in ventilators which combines a bell-mouthed vane with white induction and black eduction pipes for the purpose of introducing fresh air and eliminating foul air from an enclosed area.
Date: December 21, 1875
Creator: Moyer, Alexander L.
Item Type: Refine your search to only Patent

Improvement in Cotton-Presses.

Description: Patent for improvements in cotton-presses by using “a combination of a horizontal double reversed screw, an open semi-cylindrical and longitudinal screw-threaded recess, provided with wheels or rollers to sustain and carry the superincumbent weight or pressure.” (Lines [47]-[52], p. 2) Illustration is included.
Date: March 21, 1876
Creator: Jones, Henry B.
Item Type: Refine your search to only Patent
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