Recording compression testing meter
AssigneeRite Autotronics Corporation
InventorEdwin L. Schwartz
Life of this patent
Estimating the term…
Abstract
A recording compression testing meter having a measuring cylinder connected to the spark-plug hole of an engine cylinder by means of a tube and having an indicator arm movable by the piston of the measuring cylinder over a portion of recording paper fed from a roll of paper carried in a removable cartridge, the paper being fed from the roll by a drive mechanism carried by the cartridge so that tests of a large number of cylinders can be recorded on the continuous sheet of recording paper fed from the paper roll before it is necessary to reload the meter and the test of the cylinders of each engine can be torn off and stored separately.
Claims12
In a meter for testing the compression pressure developed by an engine piston in an engine cylinder, the pressure being transmitted by a tube to a measuring cylinder from the spark-plug hole of the engine cylinder and a measuring piston located within the measuring cylinder to move an indicator in response to compression pressure;
- the improvement comprising:
- a casing containing said measuring cylinder and being open at the one end;
- a removable cartridge insertable into said casing at said open end and containing a roll of recording paper;
- a platform on said cartridge over which said paper passes when unrolled from said roll;
- and
- marking means on said indicator located opposite said platform and movable across said recording paper on said platform in order to indicate increase in compression pressure in said measuring cylinder with successive strokes of said engine piston.
Dependencies are inferred from the claim text.