X-Ray apparatus and closure mechanism therefor
First Claim
1. An apparatus for inspecting various articles comprisinga chamber defining structure including enclosing walls and a retractable door, said structure being substantially impermeable to X-rays,a shaft member inside said structure and provided for carrying said retractable door, said retractable door including a flexible construction windable on said shaft member, wherein winding said flexible construction onto said shaft member opens said chamber and unwinding said flexible construction from said shaft member closes said chamber,motor means for driving said shaft member in rotation,a gear train mechanically linking said motor means and said shaft member, said gear train including a drive gear driven by said motor means and having gear teeth only about a portion of its circumference, and a driven gear connected to said shaft member and having gear teeth only about a portion of its circumference,said driven gear being moved independently of said drive gear upon closing said chamber, and said drive gear engaging said driven gear upon opening said chamber, andswitch means actuated by said drive gear for controlling said motor means.
1 Assignment
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Accused Products
Abstract
An apparatus for inspecting various articles in connection with the present invention comprises a structure for operating a retractable door which includes a shaft member, a flexible door member carried by and windable on the shaft member, a motor structure for driving the shaft member, and a gear train mechanically linking the motor and shaft member. The gear train includes a drive gear and a driven gear with the driven gear being connected to the shaft member and the drive gear being connected to and driven by the motor. The drive gear and driven gear both comprise gear teeth about only a portion of the respective circumferences. A switch member for controlling the motor is provided, and an actuating control structure is provided with respect to the drive gear for controlling the switch member.
29 Citations
14 Claims
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1. An apparatus for inspecting various articles comprising
a chamber defining structure including enclosing walls and a retractable door, said structure being substantially impermeable to X-rays, a shaft member inside said structure and provided for carrying said retractable door, said retractable door including a flexible construction windable on said shaft member, wherein winding said flexible construction onto said shaft member opens said chamber and unwinding said flexible construction from said shaft member closes said chamber, motor means for driving said shaft member in rotation, a gear train mechanically linking said motor means and said shaft member, said gear train including a drive gear driven by said motor means and having gear teeth only about a portion of its circumference, and a driven gear connected to said shaft member and having gear teeth only about a portion of its circumference, said driven gear being moved independently of said drive gear upon closing said chamber, and said drive gear engaging said driven gear upon opening said chamber, and switch means actuated by said drive gear for controlling said motor means.
Specification