167

Following Ward's 1936 invention there were several more

patents issued with what now appeared to be a standard

configuration for the siphon bottle head. William Brewer,

another Sparklets' engineer applied for a U. S. Patent on July 3,

1937 (No. 2,170,705). He was concerned with prevented

problems in glass siphons occurring as a result of formation of

solid carbon dioxide in the dip tube. He resolved this by using a

baffle. Brewer also worked on improvements to Campbell's

1933 "Dental Spraying Apparatus" for which he received a

patent in 1939.

In Chicago, Illinois, David Chapman was working

on another design for the Sparklets Soda Syphon

with the provision for injecting the gas at the

bottom. He filed for a Design Patent December

11, 1940 and No. 125,632 was granted March 4,

1941. Chapman's patent was assigned to Knapp-

Monarch Company, St. Louis, Missouri.

Sparklets Devices, Inc., div of Knapp-

Monarch, St. Louis. Use Sparklets

Bulbs only. Patent No. 2,066,517 and

125,632.