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Hart's first inversor, also known as Hart's W-frame, is based on an antiparallelogram. The addition of fixed points and a driving arm make it a 6-bar linkage. It can be used to convert rotary motion to a perfect straight line by fixing a point on one short link and driving a point on another link in a circular arc. [1] [3]
The simplest solutions are Hart's W-frame – which use 6-bars – and the Quadruplanar inversors – Sylvester-Kempe and Kumara-Kampling, which also use 6-bars. Sarrus linkage (1853) Peaucellier-Lipkin inversor (1864) Hart's first inversor / Hart's antiparallelogram / Hart's W-frame (1874) Hart's second inversor / Hart's A-frame (1875 ...
Although the Peaucellier–Lipkin linkage, Hart's inversor, and other straight line mechanisms generate true straight-line motion, Watt's linkage has the advantage of much greater simplicity than these other linkages.
Six-bar linkage from Kinematics of Machinery, 1876. In mechanics, a six-bar linkage is a mechanism with one degree of freedom that is constructed from six links and seven joints. [1]
The HART Communication Protocol (Highway Addressable Remote Transducer) is a hybrid analog+digital industrial automation open protocol. Its most notable advantage is that it can communicate over legacy 4–20 mA analog instrumentation current loops, sharing the pair of wires used by the analog-only host systems.
Forehand & Wadsworth (later known as Forehand Arms) was an American firearms manufacturing company based in Worcester, Massachusetts.It was formed in 1871 by Sullivan Forehand and Henry C. Wadsworth after the death of their father-in-law, Ethan Allen of Ethan Allen & Company, and was acquired in 1902 by Hopkins & Allen, a firearms company based in Connecticut.
Hartz Mountain Industries (HMI) is a private family-owned-and-operated company known for its real estate holdings in the New York/New Jersey Metropolitan Area. [1] Its former parent, Hartz Mountain Corporation, which is notable for its pet products, was founded by businessmen Max Stern and Gustav Stern. Leonard N. Stern is owner, chairman, and CEO.
Mainframe Studios is a Canadian animation studio owned by Wow Unlimited Media and based in Vancouver, British Columbia.Founded in 1993 as Mainframe Entertainment Inc. by Christopher Brough, Ian Pearson, Phil Mitchell, Gavin Blair and John Grace, the company established itself as a leading contributor to the introduction of computer-generated imagery (CGI) live action in animation, film and ...