公开(公告)号：US3842667A

公开(公告)日：1974-10-22

申请号：US40026573

申请日：1973-09-24

Applicant: WELLS MFG CORP

Inventor： ALEXANDER C ,  BOUDEMAN R

IPC: G01G3/02 ,  G01G5/04 ,  G01G19/16 ,  G01L1/02 ,  G01L1/04

CPC classification number: G01L1/04 ,  G01G3/02 ,  G01G5/04 ,  G01G19/16 ,  G01L1/02 ,  Y10T83/7151

Abstract: Means indicating displacement of a coil spring comprises a flexible tube having one closed end and partially filled with a liquid forming a meniscus in the tube. The liquid-containing portion of the tube is coiled between adjacent convolutions of the spring and in an abutting relationship therewith. A scale means is provided adjacent to the meniscus in said tube for determining change in position of the meniscus as the spring is compressed or extended.

公开(公告)号：US3716916A

公开(公告)日：1973-02-20

申请号：US3716916D

申请日：1970-02-16

Applicant: WELLS MFG CORP

Inventor： ALEXANDER C

IPC: B23D51/02 ,  B23D61/12 ,  B27B19/09 ,  B27B11/00

CPC classification number: B23D61/121 ,  B23D51/025 ,  B27B19/09 ,  Y10T83/9319

Abstract: A POWER-DRVEN RECIPROCATING SAW COMPRISES A MOTOR HAVING A HOUSING, A BLADE SUPPORT ARM SECURED ON THE HOUSING, A SAW BLADE BEARING AGAINST THE SUPPORT MEMBER AND HAVING ALTERNATING RAKER TEETH AND PAIRS OF FLAT BEVEL GROUND CUTTING TEETH, AND MEANS DRIVINGLY CONNECTING THE BLADE WITH THE MOTOR SO AS TO IMPART RECIPROCATING MOTION TO THE BLADE.