Skip to main content
Drawing of

Foamed Plastic Guitar Construction

4,188,850 1977 Charles W. Kaman, II US Solidbody Guitar Construction 7 drawings

A guitar with separate body and neck each made of a metallic frame combined with a mass of structural foamed plastic. A solid metal-to-metal joint between the two frames allows disassembly for repair or replacement. The two frames provide a continuous metallic span from the nut to the bridge to inhibit bending under string tension and reduce damping for enhanced sustain. External surfaces may be given a wood grain effect, avoiding the disadvantages of real wood such as warping, cracking, and sensitivity to temperature and humidity changes. Assigned to Kaman Aerospace Corporation. Patent granted Feb. 19, 1980; filed Nov. 29, 1977. 4 claims, 14 drawing figures.

Guitar Models

1251 · Breadwinner & Deacon 1251 1251-5 · Breadwinner & Deacon 1251-5 1252 · 1252 Deacon 12 Strings 1253-1 · Deacon 12 String 1271 · 1271 Custom Viper 1273-1 · Viper III 1281 · Preacher "Gold Top" 1283 · Preacher Deluxe 1285-5 · Preacher 1285-5

Related Content by Guitar Model

1252 Deacon 12 Strings (1252) Breadwinner & Deacon Series
(26 items)
View model page →

Catalogs (16)

Guitars (9)

Patents (1)

Breadwinner & Deacon 1251-5 (1251-5) Breadwinner & Deacon Series
(24 items)
View model page →

Catalogs (11)

Guitars (9)

Patents (1)

Schematics (3)

Breadwinner & Deacon 1251 (1251) Breadwinner & Deacon Series
(34 items)
View model page →

Catalogs (19)

Guitars (11)

Patents (1)

Schematics (3)

Preacher Deluxe (1283) Preacher Series
(22 items)
View model page →

Catalogs (20)

Guitars (2)

Preacher "Gold Top" (1281) Preacher Series
(29 items)
View model page →

Catalogs (20)

Guitars (9)

Preacher 1285-5 (1285-5) Preacher Series
(16 items)
View model page →

Catalogs (15)

Guitars (1)

1271 Custom Viper (1271) Viper Series
(27 items)
View model page →

Catalogs (18)

Guitars (7)

Schematics (1)

Technical References (1)

Deacon 12 String (1253-1) Breadwinner & Deacon Series
(12 items)
View model page →

Catalogs (11)

Patents (1)

Viper III (1273-1) Viper Series
(11 items)
View model page →

Catalogs (10)

Schematics (1)

Download PDF (0.5 MB)