ROSE W. LAMB, Petitioner, v. WORKMEN'S COMPENSATION APPEALS BOARD, KEYSTONE ENGINEERING COMPANY et al. , Respondents In Bank. John H. Lamb was employed for approximately 24 years prior to his death by respondent Keystone Engineering. After returning to work Lamb continued to make periodic visits to the doctor for approximately six months or until June of 1970. About 10 a. m. Lamb had some difficulty with a gear he was making and called for the assistance of his supervisor. After a few minutes another employee came to tell the supervisor that Lamb was lying on the floor under one of the machines.

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