US872971A - Clock-key. - Google Patents

Description

PATENTBD DEG. 3, 1907'.

A. H. PORTER.

CLOCK KEY.

APPLIOATION FILED $231.30, 1907.

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ARTHUR H. PORTER, OF BRISTOL,

CONNECTICUT, ASSIGNOR TO THE E. INGRAHAM CO., OF

BRISTOL, CONNECTICUT, A CORPORATION.

CLOCK-KEY.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed September 30. 1907. Serial No. 395,126,

To all whom "it may concern.

Be it known that I,'ARTHUR H. PORTER, a citizen of the United States, residing at Bristol, in the county of Hartford and State, of Connecticut, have invented a new and useful Improvement in Clock-Keys and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in Figure 1 a view in side elevation showing one form which my improved clock-key may assume. Fig. 2 a sectional view thereof on the line a-b of Fig. 1. Fig. 3 a sectional View showing one of the modified forms which the key may assume.

. My invention relates to an improvement in that class of clock keys which consist of a wire bow pivotally mounted in the outer end or head of a sleeve the threaded bore of which adapts it to be applied to the projecting outer end of a winding arbor, the particular object of my present invention being to provide for maintaining the bow in its operating position without interfering with its being swung into its retired posit-ion which is done for convenience in packing the clock for transportation.

With these ends in view my invention consists in a clock-key comprising a bow, and a threaded sleeve formed with a head, the ends of the bowbeing pivotally mounted in the head of the sleeve and the central portion of the bow being bent inward to engage with the said head for retaining the bow in its operating position. Y

carrying out my invention as herein shown, the wire how 2 has its central portion bent inwardly to form "a yielding retaining point 3 which engages with the outer end of the head 4 of the sleeve 5 which is formed with a threaded socket 6 to adapt it to be screwed upon the threaded projectingouter end of a winding arbor which is too well known to require illustration. When the point 3 has been so engaged the bow will be retained in its operating position in which its plane intersects the longitudinal axis of the sleeve 5, the frictional engagement between the end of the head and the point 3 being suflicient to prevent the swiveling of the bow upon its ends 7 which are inserted into shallow holes 8 in the sides of the head 4. In swinging the bow into its retired position, the point 3 will ride over the corners 10 of the head and be slightly sprung in its passage. On the other hand, when the bow is swung back into its operating position, the point will ride over these corners and be slightly sprung with the development of enough friction to insure its retention in its operating position as shown in the drawings.

In the modified construction shown by Fig. 3 of the drawings, head is formed with a seat 9 for the reception of the point 3, but this is not necessary.

I claim A clock-key comprising a bow and a threaded sleeve formed with a head, the ends of the bow being pivotally mounted in the head and the central portion of the bow being bent inward to form a yielding retaining point which co-acts with the end of the head in holding the bow in its 0 crating position.

In testimony whereof, have signed this specification in the presence of two subscribing witnesses.

ARTHUR H. PORTER.

Witnesses:

MosEs F. MUSSER. C. E. INGRA AM.

the outer end of the

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