"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 5415032 | Gas meter A compact, 4-chamber gas meter comprising crankpost and valve drive mechanisms whereby each reciprocating valve moves from a stroke shifting point near center to a stroke endpoint and back to said stroke shifting point with each 180° rotation of the cran... | 05/16/1995 |
| 4901567 | Shaft device for a bellows-type gas meter A shaft device for a bellows-type gas meter. A first eccentric cam assembly and an element having a radial groove are both coupled to the shaft. A second eccentric cam assembly having an opening is placed on the shaft. A rotatable insert element is insert... | 02/20/1990 |
| 4856331 | Bellows-type gas meter A bellows-type gas meter comprises two compartments each having a diaphragm as well as a shaft common to said two compartments, said shaft having two eccentric cam assemblies, one of said eccentric cam assemblies being connected with the crank assemblies ... | 08/15/1989 |
| 4706496 | Diaphragm gas meter A diaphragm gas meter wherein the movement of the diaphragms is in a side to side direction and the transfer valve assembly and connecting linkages are all substantially toward the rear of the meter.... | 11/17/1987 |
| 4091668 | Diaphragm type gas meter In a diaphragm type gas meter, one crank plate pivotally mounting a pair of diaphragm movement transmission levers and the other crank plate pivotally mounting a pair of valve actuating levers overlap each other rockably around the central axis of a crank... | 05/30/1978 |