Patent GB-321606-A (GB)
Title: Improvements in or relating to athletic boots or shoes
IPC: A43C15/16
Filed: 1929-01-23
Abstract: 321,606. Dobbie, R. M., and Dobbie, J. A. Jan. 23, 1929. Protectors, securing; studs, detachable.-Relates to athletic boots or shoes with detachable tread devices of the kind in which studs, spikes, bars, or other foot grips are carried by a plate or plates adapted to be detachably secured to means let into the soles or heels of the boots or shoes. According to the invention, the means let into the shoe comprise screwed members each having an enlarged head positioned adjacent the insole and an internally-threaded socket, and each plate is provided with a slot engaging the head of a member screwing into the socket. The slots may extend inwards from a side of the plate or may be of keyhole or like kind, and, may be straight, curved, or angular. The plates are, preferably, of " Duralumin " but may be of vulcanite or ebonite. The studs may be riveted to the plates or integral with them, and may take the form serrations or indentation, providing sufficient projections are provided to afford a secure grip. The plates may have a rubber, leather, or fabric facing on which studs, or a studded or ribbbed sole or heel, of crepe rubber is formed or secured. Alternatively, projections on a crepe rubber backing may extend through apertures formed in the plates. Plates 1, 2, Fig. 1, connected by an integral cross piece 3 are formed with key hole slots 4, 7, each co-operating with a screw head 14 engaging a socket 9, Fig. 6<a>, having an enlarged head provided with fangs 11 penetrating the outer sole. An additional plate 17 may be secured to the cross-piece 3. To prevent the device shifting on the sole, the under sides of the plates may have short spikes engaging the outer sole. Additionally a stud 62 with an elongated head is turned, when the device is in position, to prevent the wide ends of the slots being displaced to align the heads 14. The plates are arched or cambered so that their outer edges closely engage the sole. In a modification, the slots extend inwards from the sides of the plates, and the conecting plate is slotted to allow lateral movement and adjustment. In mother modification, the plates are pivoted together at the toe end. Additional holes may be formed in the plate to allow screws or nails to provide supplementary fastenings. The device may be fitted by bending the plate until the wide ends of keyhole slots align with heads 14, and then straightening the plates so that the narrow portions of the slots slide under the slackened heads. The studs may be detachable, a head 57, Fig. 9, engaging a headed screw passed through a hole in the plate. Extra holes may be formed in the plate to allow various distributions of these studs. In a modification. a screw 58, Fig. 16, formed with a collar 58a may be riveted to the plate to carry a detachable stud 59. A form of socket which may be fitted to a finished boot comprises a square shank 50, Fig. 7, of pronged tubular form at its inner end : a hole is made in the outer sole and a laced ball 54 placed between the prongs. The boot is then positioned by the last and the socket driven into the hole. When the lead ball is stopped by reaching the insole, the prongs are spread, Fig. 8, to form an enlarged head. The grooves for turning the heads 14 may be at the sides of the heads. The plates may be recessed or countersunk to accommodate the heads 14. A spring strip 60, Fig. 11, may be substituted for the stud 62.