Abstract: A digital watch has a face mounted local pulse sensor unit which is coupled to infrared plethysmograph electronics within the watch. The local pulse sensor includes transmitter and receiver photodiodes connected to the electronics by a plurality of moveable contact fingers. A connector at one end of a flat cable is insertable into a slotted opening on the side of the local pulse sensor and between the contact fingers and the two local photodiodes to disconnect the photodiodes from the electronics. Simultaneously, a remote pulse sensor unit at the other end of the cable is electrically coupled to the contact fingers by the connector for enabling the wearer's pulse at his finger to be sensed. A loop about the connector end of the cable maintains the connector in position when inserted into the local pulse sensor receptacle. A cuff at the remote sensor end of the cable secures the sensor to a wearer's finger for pulse monitoring.

Abstract: A digital watch having a face mounted detachable pulse sensor unit coupled to infrared plethysmograph electronics within the watch. The pulse sensor unit is detachable from a receptacle on the watch face and mountable into a receptacle at a first end of a remote pulse sensing cable. The second end of the cable is connected into the watch receptacle for conveying the pulse sensing information to the infrared electronics. A cuff holds the pulse sensor unit in place against the wearer's finger for sampling his heartbeat. The wearer may thus monitor his pulse rate while both hands are free.

Abstract: An electronic device, e.g., a quartz crystal in an enclosure having three stubby leads for use in an electronic watch, is mounted adjacent to a substrate having three feedthrough holes near its perimeter. Connection between the substrate and the three stubby leads are made simultaneously by three individual connection devices all attached to a tab through individual breakaway neck portions. Each connection device comprises a tail which is forked for insertion by interference fit into the feedthrough holes in the substrate. At the opposite end from the tail is a keyhole opening, in which the larger hole fits over one of the stubby leads and in which a smaller hole can be slid onto the lead by a force fit. Thus, in operation, the bifurcated tails of each device are placed through the feedthrough holes and the keyhole openings of each device are placed over their respective stubby leads.

Abstract: A generally C-shaped or .OMEGA.-shaped elongated clamp secures a flexible circuit or flat cable to the edge of a circuit board designed for use in electronic watches, calculators, combinations thereof and like small devices such as are wearable on the user's wrist.

Abstract: Push button switches extending through the case wall of an electronic device, such as a combination watch-calculator engage on a three finger flat spring positioned so that one finger is in continuous electric contact and at least one finger can be pressed by the first button into engagement with an internal electrical contact point to provide manual signaling into the electronics.

Abstract: A tabulator keyboard of simplified design may be fabricated from a single flexible circuit and a minimum of other mechanical structures. The flexible circuit combines in one piece an array of deformable upper contacts, an array of stationary lower contacts, as well as the required interconnections between the elements of these arrays and the electronics module. The flexible circuit may be made of a reasonable transparent dielectric film (e.g. polyamide). The flexible circuit is folded in use such that the lower stationary array has its conductive surface opposite the upper deformable array. Means are provided for making electrical contact between a selected element in said lower array with a selected element in said upper array.

Abstract: Electronic watch module is constructed of a spacer block, a substrate on the spacer block carrying electronic components thereon, and a cover over some of the electronic components. Basic rate control of the electronic watches is provided by a crystal which is mounted in a can. An opening in the spacer block receives the crystal can, and deflectable fingers on the spacer block restrain the crystal can in place.

Abstract: Electronic watch module comprises spacer block which has openings therein for batteries, crystal can, etc. and has locating pins thereon. The watch electronic substrate is located on the pins and carries most of the watch electronics including chips, printed circuitry and LED displays on the front. A cover is located on the pins, extends over many of the electronic components and resiliently engages in the watch case. The spacer block, substrate with its electronics and cover comprise the watch module which is resiliently mounted in the watch case by the resilient engagement.

Abstract: Electronic substrate of the electronic watch is the principal carrier of the electronics and electrical interconnections. It carries two alignment notches with top and bottom spacers embracing the substrate and engaging the alignment notches. The visual horological display is located in the top spacer and the batteries are located in the bottom spacer. Springs press onto the substrate and are contactable for input to the watch electronics. All important parts are keyed together for ease of assembly and accuracy of alignment.

Abstract: Battery operated device has battery wells into which batteries are inserted. Spring-loaded rings in the wells are configured so that electrical contact is not made when the batteries are inserted in the wrong polarity orientation but permit contact when the batteries are correctly inserted.

Abstract: Electronic watch movement is principally electronics mounted upon a substrate. The substrate is mounted with respect to the watchcase so that it can laterally shift in response to lateral shock. Springs are mounted on the substrate and resiliently center the substrate. At least one of these springs is electrically connected to the circuitry on the substrate and is contactable by an externally actuatable push-button so that external action on the watchcase can result in electrical changes in the electronic circuit of the watch movement.