(Contributed by: Cassidy P., and Dixie E.)
Technology: Vibrating Alarm Clocks
Invented: between 1890 and 1903 (exact year unknown)
Invented by: William Edward Shaw (deaf since age 5)  
- Went to American School for the Deaf in Hartford, CT
- Worked for electric companies
- Invented in home laboratory
- Worked with Thomas Edison
- Admired by Alexander Graham Bell
- Other Inventions: Talkless Telephone, Baby Monitor, Door Bell.
Purpose: This technology is intended to assist deaf people in waking-up by alarm.
How it works: In the modern versions, there is an attachment to special clocks, which will vibrate at the set time. This attachment can be a device placed under sheets or pillows, or can be in the form of a vibrating wristband. 
Impact: Assists in helping the legitimacy and capabilities of deaf individuals and makes everyday life easier.
 Peirce, J. (1903, May 1). A Deaf Mute Electrician. The Silent Worker, 132-132.
 Muddy River Musings: Deaf Inventor Aids the Deaf, http://brooklinehistory.blogspot.com/2009/05/deaf-inventor-aids-deaf.html
 Deaf Alarm Clock, http://www.start-american-sign-language.com/deaf-alarm-clock.html
Sonic Boom Alarm Clock (amazon.com) and
Silence by Johan Brengsjo