Wrench (Patent No: 180721)

Inventor: Birand , Felix P. Jr.

Location: Purple Springs

Comments: N/A

Description: Cle anglaise.

Felix P. Birand, Jr., Purple Springs, Alberta, Canada. 4th December, 1917; 6 years. Filed 15th October, 1917. Receipt No. 286,414.

Claim.—1. The combination with a wrench including a stationary jaw having a shank and a movable jaw having a carriage provided with a bore receiving the shank, said carriage opposite the jaw having a transverse slot defining a straight inner wall and a rounded outer wall, and the said , slot communicating with the bore of the carriage, a ring member arranged in the slot and having its inner periphery contacting with the rounded wall provided by the slot, said ring having its outer periphery gradually extended outwardly whereby to increase the cross sectional diameter thereof and to provide a cam surface that is adapted to contact with one of the edges of the shank, and by virtue of such contact to force the shank into contact with one of the walls of the bore of the carriage.

2. In combination with a wrench including a stationary jaw having a shank provided with teeth upon one of the edges thereof, and a movable jaw including a carriage having a bore to receive the shank, and one of the walls of the said bore being provided with teeth to co-act with the teeth of the shank, said carriage having a transverse slot defining an inner straight wall and an outer rounded wall and said slot communicating with the bore of the carriage, a milled ring loosely arranged in the slot and adapted to have its inner periphery contacting with the outer rounded wall provided by said slot, said ring being gradually increased in thickness from one of the ends to the opposite end thereof upon its outer periphery, whereby to provide the said outer surface of the ring with a cam member, and the said cam member designed to contact with the smooth edge of the shank and by virtue of such contact force the shank laterally of the carriage to bring the teeth of the said shank into engagement with the teeth in the bore of the carriage.