Alignment device
US4041649A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Nov 15, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23Q3/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An alignment device of the type primarily intended for use in combination with an ophthalmic cylinder surfacing machine to insure proper optical axis alignment of the lens blank, to the lap, as it is being ground. The device includes a base member which is fitted into the lap-retaining table of the surfacing machine and a top member which is fitted onto the pins of the pin holder of the machine. An open circuit including an audible or visual signal is mounted within the base member, and electrical contacts for the circuit are disposed on the base's upper surface. Corresponding electrical contacts are disposed on the bottom of the top member so that when the top is placed in contiguous, overlying relationship to the base, if the alignment of the machine is properly adjusted, the electrical circuit will be completed resulting in either an audible or visual signal to the operator that the machine is ready for use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.