Abstract: A marker stake for locating a boundary reference point on a sports field can be buried and out of sight when not in use, and then quickly located using an electronic receiver which detects a signal emitted by an electronic marker in the marker stake. Various field boundary indicators can be removably attached to the marker stake. The stake may be embodied in a cylindrical body constructed of a moldable polymer with a socket at one end for receiving a pin or post of the field boundary indicator, and the electronic marker embedded inside the body. The electronic marker may be a passive LC marker tuned to a frequency associated with a known field sport. Different sets of such marker stakes tuned to different frequencies may be used to mark and relocate reference points for multiple sports played on the same field.

Abstract: At an extremity of the pointer board of a push-button tuner is fixed a member on which a pointer is mounted. At a surface of the member on which the pointer is mounted. There is disposed a lateral fitting groove having an opening at the front surface. The fitting groove is provided with indentations. The pointer has a fitting portion engaging with the fitting groove on its back surface and the fitting portion has protrusion engaging with one of the indentations.

Abstract: A pushbutton tuner formed of a base unit (A) including a memory slide and operating members for displacing the memory slide upon operation of a push button; a coil unit (B) including a movable member provided with cores displaceable relative to coils; a clutch unit (C) including a clutch mechanism and provided with a rotating shaft for manual tuning operation; and an arm unit (D) including a plurality of button slides fitted with push buttons, respectively, and slidably disposed on a top plate. These units are assembled separately from each other and, then, mounted on a baseplate of the base unit (A).

Abstract: An indicator mechanism in a pushbutton tuner characterized in that there is provided a front plate horizontally extending from the top end of the tuner casing. The front plate is integrally formed with two-stepped protrusions, the lower one of which is inserted in a central bore of a slidable plate mounted on the front plate so that the slidable plate can pivot about the lower protrusion as an axis. The indicator mechanism further comprising a plate spring having an open rectangular configuration for seizing the front plate between its upper and lower plates. The plate spring is also formed with a through bore in its upper plate for receiving the upper protrusion of the front plate. The front plate is further formed with projections as high as the lower protrusion by which the upper plate of the plate spring is supported.

Abstract: A pointer and scale indicating assembly for a radio receiver is disclosed. A scale with indicia thereon is fixed to a radio receiver chassis and a pointer arm is movably mounted in the chassis to positions corresponding to the frequency to which the radio receiver is tuned. A resilient pointer rod is mounted on the pointer arm and has an end portion visually cooperating with the scale indicia to indicate the receiver frequency. The pointer rod is hand insertable onto the pointer arm and is attached thereto by having an end portion of the pointer rod cooperating with a raised surface and a holding projection of the pointer arm.

Abstract: A tuning apparatus includes a dial plate marked with broadcast frequencies thereon; guide shafts provided in parallel with the dial plate; a plurality of markers slidably mounted on the dial plate, with each marker representing a preset position and formed with a first engaging portion; a slidable mount member formed with leg portions slidably fitted on the guide shafts, a dial pointer extending from the leg portions to the dial plate to indicate a selected broadcast frequency and catchers or sleeves rotatably mounted on the guide shafts and formed with a second engaging portion, whereby the slidable mount member is driven by a tuning knob such that the first and second engaging portions are brought into engagement with each other in response to the rotation of the guide shafts during the preset mode of operation of the tuning apparatus.