Lead Use in Cable Splicing 1959 Americans At Work Telephone Linemen @markdcatlin

Uploaded April 2013 | Updated September 2026, 1 day ago

Splicing telephone cable required great skill. The splicer installed wrapped muslin cloth around the splice bundle and then sealed the spliced area with lead to make a water-tight seal. In part due to occupational health problems with handling lead, this process was replaced by joining the cable sheaths by a single wire (to provide electrical conductivity), covering the join with a heat shrink then a plastic shroud which can be covered in a sealing tape to ensure no moisture can enter the join. For thousands of years, lead has been known to be hazardous. However, for many years, relatively little was done to adequately protect U.S. workers from the hazardous effects of lead exposure. This changed in November 1978, when the Occupational Safety and Health Administration (OSHA) issued an improved lead standard for industrial workers. OSHA estimated that 835,000 workers, would be protected by the standard. Lead exposure can result in workers experiencing headaches, fatigue, irritability, nervousness, high blood pressure, sleeplessness, pain in joints, aching muscles, poor appetite, stomach pains, and constipation. If a worker should notice any of these symptoms, she/he should see a doctor. Even more severe effects of lead exposure such as damage to the nervous system, kidney damage, sterility and birth defects, anemia, and interference with the body's blood forming mechanism may afflict some workers. Since all of these health problems may either appear slowly or be caused by other reasons, lead can be easily overlooked as the cause. Some workers with these problems will have them for many years, but the health effects will not get much worse. Others will either suddenly or gradually develop the disabling or life threatening effects of lead poisoning. Lead can enter your body in two ways-- by breathing or swallowing. Up to 70% of the lead dust or fumes that one breathes is/are absorbed into the body; whereas, approximately 30% of the lead one swallows is absorbed into the body. This was clipped from the film, Telephone Linemen, made in 1959 as part of the Americans At Work film series, produced by the AFL-CIO during the 1950's. It was Issue 36. The film covers the different jobs that telephone linemen do including installers, splicing wires, putting up telephone poles, & running microwave relay.

Lead Use in Cable Splicing 1959 Americans At Work Telephone Linemen

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$Skin Cancer Hazard to Oil Refinery Workers in the 1940s, Standard Oil, 1954 This clip is from the 1954 film, Medical Service for Industry, produced by the Standard Oil Company of New Jersey. The 26-minute film describes the corporations approach to company-provided medical services for employees in its hundreds of locations around the world. This clip shows the research and action after the company learned that some petroleum oils, from their new fluid catalytic cracking process, caused cancer when applied to the skin of mice. In this clip, Standard Oil ends by explaining that measures for minimizing worker exposure to carcinogenic oils have been implemented. However, that was not the end of this story. The following is taken from the 1974 article Oil Refineries by Rick Engler in the HEALTH/PAC Bulletin published by the Health Policy Advisory Center No. 61 November/December 1974 and available at http://www.healthpacbulletin.org/wp-content/uploads/2012/10/1974-Nov-Dec-61.pdf . Rick Engler is a past Board member of the U.S. Chemical Safety and Hazard Investigation Board (2015 – 2020) and founder and past Director of the New Jersey Work Environment Council (WEC). Catalytic cracking found its first application during World War II in the manufacture of aviation gasoline. In 1942 Standard Oil (New Jersey) built the first commercial fluid catalytic cracker (FCC). That same year, scientists found that samples of some high boiling catalytically cracked oils caused cancer when applied to the skin of mice. In 1947, scientists in the Medical Department of Jersey Standard Oil concluded that .. . a potential cancer hazard existed where man came in contact with these oils. And in 1951 Standard reported that measures for minimizing worker exposure to carcinogenic oils, such as better personal hygiene practices, keeping units closed and painting pipelines containing these oils had been instituted. While it is unclear to what extent carcinogen exposure was really minimized at Jersey refineries, it is certain that other oil companies did little or nothing to prevent contact with such potentially hazardous hydrocarbons. The American Petroleum Institute (API), the industrys trade association, funded a study in 1949 at the University of Cincinnatis Kettering Laboratory to find out the cancer-causing potential of intermediate and finished petroleum products. To do this, the Kettering researchers experimented with mice and surveyed company medical departments to find whether cancer was a problem afflicting refinery workers. Mice rapidly developed cancer from some fractions, confirming the results of previous research by Standard. The primary carcinogenic agents in these oils were found to be certain polycyclic aromatic hydrocarbons (PAHs). In 1950 the Committee sponsored an epidemiological study to determine the number of workers who had developed cancer. However, most oil companies refused and/or were unable to cooperate with the study. In 1956, the Medical Advisory Committee ended the survey, concluding that there was . . . no evidence of occupational cancer within the population surveyed. The conclusion also reflected the fact that, whereas it may take 20 or even 30 years after exposure for cancer to be detected, the study ended in 1956, ten years or so after the widespread use of catalytic cracking began. But the scientists who had worked on the project remained concerned. Despite their healthy suspicion that certain hydrocarbons were likely to produce cancer, their abiding faith in the good intentions of industry resulted in their falsely assuming that .. . high engineering standards and good housekeeping, with respect to this modern automatic equipment has, in general, restricted the contacts of workmen with these products. But had the scientists spoken to oil workers, their suspicions would have been heightened. They would, for example, have discovered that cat crackers were not, as the industry had claimed, totally closed systems. Pumps and other equipment leaked oil mists and vapors during normal operation. They also would have discovered that during maintenance shutdown, workers enter vessels and clean pipelines where sludges or residues containing potent carcinogens remain. Today, Oil refinery workers are still exposed to several well-established carcinogens and working in this industry has been classified as probable cancer-causing to humans. The entire 1954 film, Medical Service for Industry, can be viewed and downloaded from the U.S. National Library of Medicine’s wonderful collection of historic films at https://collections.nlm.nih.gov/catalog/nlm:nlmuid-8600095A-vid .$

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