1851 Great Exhibition: Official Catalogue: Class X.: C. MacDowall
From Graces Guide
68. MACDOWALL, C., 4 Hyde Street, Bloomsbury — Inventor.
Clock-movement, with a dead escapement of a new construction, in which the escape-wheel consists merely of a small disc, with a single pin in it. The parts are arranged for the purpose of exhibiting the action of the escapement. The advantages claimed are—the impulse takes place at the middle of the vibration of the pendulum, as in the common dead escapement; it is given chiefly by direct, action instead of oblique, and requires little oil; the construction is easy, and may be made with a ruby for the escape-pin as cheaply as with a common recoil escapement. It is applicable to watches as well as clocks.
(E. J. Dent, Manufacturer and Patentee, by assignment).
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