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More coal—safely
Sheffield minitram report
Slide projector safety
A Minitram system in Sheffield could bring a new standard of service to public transport; the structures and associated landscaping would contribute to a new townscape. These conclusions are contained in a report "Minitram in Sheffield" published by Robert Matthew, JohnsonMarshall and Partners. Minitram is a new urban transport system that uses small automatically controlled vehicles running at very short intervals on segregated track.
Safety for the amateur photographer is the goal of a new American National Standard that spells out safety requirements for photographic slide projectors intended for consumer use. The standard applies to projectors manufactured primarily for use in the home or classroom, with maximum nominal lamp power of 500 W. Heat, electrical shock, and sharp edges are the principal hazards. The standard sets temperature limits for exposed portions of the projector, for operating controls, and for surfaces that might be touched in carrying. It prohibits sharp edges on exposed surfaces and moving parts and calls for protective devices in case of lamp explosion, lens shattering, loosening of the fan blade, breakage of the drive belt, and overheating. To guard against electrical shock, it specifies that the projeclor must meet American National Standard safety requirements for motor-operated appliances and calls for caution notices and adequate instructions for replacing lamps.
The one year study, which was commissioned by the Transport and Road Research Laboratory of the Department of the Environment, was carried out with the co-operation of Sheffield District Council (formerly Sheffield Borough Council) and South Yorkshire County Council The TRRL has also sponsored technical studies of vehicle designs and control systems by EASAMS Ltd (a General Electric Company) and Hawker Siddeley Dynamics Ltd. A passenger behaviour study was undertaken by Loughborough University. The results from these studies are now being evaluated.
x
Copies of the new safety standard,
American National Standard SaCety Requirements jk)r Photographic Slide Projectors for Consumer Use,
Making powders dust-free A process to render powdery materials essentially dustless developed by The Harshaw Chemical Co, of Cleveland, Ohio (USA), is being licensed in Europe through Du Pont de Nemours International SA, who are also marketing a new type of PTFE"Teflon" K particle control additive specifically developed for this application. The process neither coats the product nor adds to it any reactive materials. Dust is held loosely in a web of microscopic fibres of unsintered polytetrafluorethylene with some particles trapped inside and some dust adhering to the web itself. Very small quantities of Du Pont's "Teflon" K particle control additive are required for dedusting: typical amounts are from 0-1% down to as little as 0"005%, or 1 kg down to 50 grams per ton of powder.
6-Component measuring system The Electronic Unit Type 9803 from Kistler Instruments Ltd, 2 Clockhouse Rd, Farnborough, Hants, broadens the field of application of the Measuring Platform Type 9261A. Such a system not only measures the three components of the acting force but also the co-ordinates of the point of force application on the platform surface as well as the free torque about
Kistler electronic unit type 9803 together with a Measuring Platform Type 9261A for studying posture control under various external stimuli in neurology. The diagram shows the movement of the centre of gravity of the test subject, recorded during 15 seconds with eyes closed (positive x-axis: to the left; positive y-axis: forward).
an axis normal to the surface. These measurands can be determined dynamically (up to over 200 Hz) and quasistatically (to over several minutes). The summing amplifiers and the analogue divider form a small analogue computer, which calculates from the eight output signals of the platform the three force components Fx, F~, Fz; the co-ordinates a x and ay of the point of force application; and the free torque M'z. This measuring system has been used in such applications as orthopedics: (gait analysis, load on prosthesis, monitoring rehabilitation, etc), sports: (reaction forces on athletes in broad and high jump, shot put, running, etc) and floor coverings and shoes: (determining coefficients of friction dynamically, etc).
PH3.61-1974, at £3 each, may be ordered from the American National Standards Institute, 1430 Broadway, New York, New York 10018, USA.
More coal-safely The Final Report of the Tripartite Coal Industry Examination had explained that extra coal was needed, but never at the expense of safety. There was no evidence of any significant change in the fatal and serious accident rates being brought about by the introduction of daywage systems. In fact, ever since nationalisation good progress had been made and sustained. The combined rate was 1"37 per 100,000 manshifts in 1951 and 1"08 in 1973/ 74 - a reduction of about a quarter. The Board and the Unions were jointly committed to do everything possible to continue the reduction in dust disease and there had been some encouraging results so far. In 1950, the initial diagnosis rate for every thousand men employed was 6"2. In 1973, the provisional figure was 2.0. Bigger outputs did not mean more dust being created in the mine. In tact, it was when machines slowed down and churned up the coal that more dust was created than at normal cutting speeds. In addition, stricter dust regulations were shortly to be introduced.
Applied Ergonomics June 1975
121
Slide projector safety
A Minitram system in Sheffield could bring a new standard of service to public transport; the structures and associated landscaping would contribute to a new townscape. These conclusions are contained in a report "Minitram in Sheffield" published by Robert Matthew, JohnsonMarshall and Partners. Minitram is a new urban transport system that uses small automatically controlled vehicles running at very short intervals on segregated track.
Safety for the amateur photographer is the goal of a new American National Standard that spells out safety requirements for photographic slide projectors intended for consumer use. The standard applies to projectors manufactured primarily for use in the home or classroom, with maximum nominal lamp power of 500 W. Heat, electrical shock, and sharp edges are the principal hazards. The standard sets temperature limits for exposed portions of the projector, for operating controls, and for surfaces that might be touched in carrying. It prohibits sharp edges on exposed surfaces and moving parts and calls for protective devices in case of lamp explosion, lens shattering, loosening of the fan blade, breakage of the drive belt, and overheating. To guard against electrical shock, it specifies that the projeclor must meet American National Standard safety requirements for motor-operated appliances and calls for caution notices and adequate instructions for replacing lamps.
The one year study, which was commissioned by the Transport and Road Research Laboratory of the Department of the Environment, was carried out with the co-operation of Sheffield District Council (formerly Sheffield Borough Council) and South Yorkshire County Council The TRRL has also sponsored technical studies of vehicle designs and control systems by EASAMS Ltd (a General Electric Company) and Hawker Siddeley Dynamics Ltd. A passenger behaviour study was undertaken by Loughborough University. The results from these studies are now being evaluated.
x
Copies of the new safety standard,
American National Standard SaCety Requirements jk)r Photographic Slide Projectors for Consumer Use,
Making powders dust-free A process to render powdery materials essentially dustless developed by The Harshaw Chemical Co, of Cleveland, Ohio (USA), is being licensed in Europe through Du Pont de Nemours International SA, who are also marketing a new type of PTFE"Teflon" K particle control additive specifically developed for this application. The process neither coats the product nor adds to it any reactive materials. Dust is held loosely in a web of microscopic fibres of unsintered polytetrafluorethylene with some particles trapped inside and some dust adhering to the web itself. Very small quantities of Du Pont's "Teflon" K particle control additive are required for dedusting: typical amounts are from 0-1% down to as little as 0"005%, or 1 kg down to 50 grams per ton of powder.
6-Component measuring system The Electronic Unit Type 9803 from Kistler Instruments Ltd, 2 Clockhouse Rd, Farnborough, Hants, broadens the field of application of the Measuring Platform Type 9261A. Such a system not only measures the three components of the acting force but also the co-ordinates of the point of force application on the platform surface as well as the free torque about
Kistler electronic unit type 9803 together with a Measuring Platform Type 9261A for studying posture control under various external stimuli in neurology. The diagram shows the movement of the centre of gravity of the test subject, recorded during 15 seconds with eyes closed (positive x-axis: to the left; positive y-axis: forward).
an axis normal to the surface. These measurands can be determined dynamically (up to over 200 Hz) and quasistatically (to over several minutes). The summing amplifiers and the analogue divider form a small analogue computer, which calculates from the eight output signals of the platform the three force components Fx, F~, Fz; the co-ordinates a x and ay of the point of force application; and the free torque M'z. This measuring system has been used in such applications as orthopedics: (gait analysis, load on prosthesis, monitoring rehabilitation, etc), sports: (reaction forces on athletes in broad and high jump, shot put, running, etc) and floor coverings and shoes: (determining coefficients of friction dynamically, etc).
PH3.61-1974, at £3 each, may be ordered from the American National Standards Institute, 1430 Broadway, New York, New York 10018, USA.
More coal-safely The Final Report of the Tripartite Coal Industry Examination had explained that extra coal was needed, but never at the expense of safety. There was no evidence of any significant change in the fatal and serious accident rates being brought about by the introduction of daywage systems. In fact, ever since nationalisation good progress had been made and sustained. The combined rate was 1"37 per 100,000 manshifts in 1951 and 1"08 in 1973/ 74 - a reduction of about a quarter. The Board and the Unions were jointly committed to do everything possible to continue the reduction in dust disease and there had been some encouraging results so far. In 1950, the initial diagnosis rate for every thousand men employed was 6"2. In 1973, the provisional figure was 2.0. Bigger outputs did not mean more dust being created in the mine. In tact, it was when machines slowed down and churned up the coal that more dust was created than at normal cutting speeds. In addition, stricter dust regulations were shortly to be introduced.
Applied Ergonomics June 1975
121