3,272 research outputs found
The transmission of vibration to the occupants of a car seat with a suspended back-rest
No full textA new type of car seat has been designed in which the back-rest is able to move freely in the vertical direction. The design allows the back-rest to follow the vertical vibration of the back of an occupant of the seat. This is intended to decrease any strain on the lumbar part of the spinal column caused by a different vertical motion at the seat squab and the seat back. The transmission of vertical (z axis) vibration from the base of this seat to the seat surface, to the back-rest and to the backs and heads of seat occupants has been measured. Measurements were made with the seat back fixed, to prevent vertical motion relative to the seat frame, and with the seat back free to move. Vibration transmissibilities from the seat base to the seat surface were characterized by a resonance at frequencies in the region of 4 Hz. The resonance frequencies were slightly higher with the fixed back-rest than with the moving back-rest. The transmissibilities at frequencies above 4 Hz -were generally higher with the fixed back-rest. Measurements with no contact between the seat occupants and the seat back indicated that the dynamic properties of the human body and the seat cushion were less influenced by the moving seat back than by the fixed seat back. Differential motion between the seat surface and seat back was smaller with the moving seat back than with the fixed back.</p
C.H. Powell Racer
No full textLeft hand side view of the C.H. Powell Racer, a racing aircraft, on the ground. Note on back 1st place in 1925 Mitchell Field Races.https://corescholar.libraries.wright.edu/special_ms223_photographs/1696/thumbnail.jp
C.H. White and R.R. Gordon on Passenger Scooter
No full textPhotograph of C.H. White nad R.R. Gordon riding in a passenger scooter with the words,"Factory Manager" on the back. Other scooters are parked nearby. The men are dressed in suits
C.H. White and R.R. Gordon on Passenger Scooter
No full textPhotograph of C.H. White nad R.R. Gordon riding in a passenger scooter with the words,"Factory Manager" on the back. Other scooters are parked nearby. The men are dressed in suits
Response to the Round Table on Why Did We Choose to Industrialize? Montreal 1819–1849
No full textAuthor Robert C.H. Sweeny responds to comments on his award-winning book, Why Did We Choose to Industrialize? Montreal 1819–1849.L’auteur Robert C.H. Sweeny répond aux commentaires de son livre récompensé, Why Did We Choose to Industrialize? Montreal 1819–1849
John C. Moore, C.H. Blackburn and F.M. Coates posed together at the 1909 Glidden Tour
No full text4.5x6.5 black and white photograph of John C. Moore, C.H. Blackburn and F.M. Coates posed together at the 1909 Glidden Tour. Caption on photo back: 'John C. Moore, driver of the Lexington #114 at the wheel, with C.H. Blackburn, F.M. Coates, sales manager of Kinsee Co.' Negative #C22,727
Sonic Buoy - GCAT Raw Data Logger handbook
No full textThe GCAT Raw Data Logger was developed as part of the Sonic Buoy development program; it was required as an on-board partial back-up system to the (previously untried) VHF Radio Telemetry System for obtaining raw sonic anemometer data.
It monitors the sonic anemometer transmit and receive lines to determine the start and end of the sections of data used by the Sonic Processor and logs a single record to a 4 Mbyte Flash EEPROM PCMCIA card at intervals of 48 hours.
This document describes in detail the design and operation of the GCAT Raw Data Logger; it is intended to serve the combined purposes of documenting and design and acting as a guide to operating the system and recovering the data
Newspaper Clipping - American Legion honors Outstanding Citizens;Dorothy Cooper, Pete Beaulieu, Elvira Engstrom, Harold Anderson, C.H. Carlson; Back row - Alton Wardwell, Curtis Cooper, Donald Collins, Rev. Paul Gleichman & Commander John Simpson.
No full textNewspaper Clipping - American Legion honors Outstanding Citizens;Dorothy Cooper, Pete Beaulieu, Elvira Engstrom, Harold Anderson, C.H. Carlson; Back row - Alton Wardwell, Curtis Cooper, Donald Collins, Rev. Paul Gleichman & Commander John Simpson.https://digitalmaine.com/stockholm_images/1436/thumbnail.jp
Newspaper Clipping - American Legion honors Outstanding Citizens;Dorothy Cooper, Pete Beaulieu, Elvira Engstrom, Harold Anderson, C.H. Carlson; Back row - Alton Wardwell, Curtis Cooper, Donald Collins, Rev. Paul Gleichman & Commander John Simpson.
No full textNewspaper Clipping - American Legion honors Outstanding Citizens;Dorothy Cooper, Pete Beaulieu, Elvira Engstrom, Harold Anderson, C.H. Carlson; Back row - Alton Wardwell, Curtis Cooper, Donald Collins, Rev. Paul Gleichman & Commander John Simpson.https://digitalmaine.com/stockholm_images/1436/thumbnail.jp
- …
