US1227085A - Signal. - Google Patents

Description

NVEIYTOH ATTORNEY.

Patgnted May 22,1912.

UNITED STATES PATENT OFFICE.

WILLIAM SPARKS, OF JACKSON, MICHIGAN, ASSIGNOR TO THE SPARKS-WITHING-TON COMPANY, OF JACKSON, MICHIGAN, A CORPORATION OF MICHIGAN.

SIGNAL.

Specification of Letters Patent. I Patented Ma y 22,1917.

Application filed October 8, 1915. Serial No. 54,736.

' resident of Jackson, in the county of J ackson, in the State of Michigan, have invented new and useful Improvements in Signals, of whichnthe following, taken in connection with the accompanyingdrawings, is a full, clear, and exact description.v ,v

This invention relates to certain improvementsin mechanicallyoperated signals, of the cam-actuated diaphragm type.

The primary object of the invention relates to the production of novel and efficient means for varying the overlap of the cam projections on the wear-piece of the diaphragm for varying the extent of forced vi-- bration ofthe diaphragm and the sound produced therebyJ Other objects and advantages will appear from the following description, taken in connection with the accompanying drawing's, in which- Figure 1 is a side elevation of the device. Fig. 2 is a vertical central cross section of the same.

Fig. 3 is a view of the clutch mechanism showing the case in section.

The invention as shown comprises a-suitable diaphragm '1-- having its marginal portion clamped between the base -2 of an amplifier 3- and a dished case section -lhaving an elongated laterally extending opening arranged substantially centrally of the diaphragm, through which opening a portion. of a rotary actuator- 5-- is adapted to project for allowing contact of the teeth 6- thereof with a wearpiece rigidly mounted on the diaphragm.

The actuator 5 has a toothed portion 6 positioned substantially diametrically of the diaphragm and a second portion 7,- offset from the portion 6- to form a central recess -8-. The offset portion of the actuator 5- is rigidly mounted upon a rotary shaft 9- having a spirally arranged portion 10- upon which is mounted a suitable actuating and clutch mechanism comprising a case 11 inclosin a nut 12 having a central opening adapted to fit the shaft 71.0.- so'that longitudinal movement of the ut.'-12.- along the shaft 10..will cause rotation of either the shaft or the nut.

The e se ll: is of somewhat gre ter depth that the thickness of the nut 12 and is provided with projections 13' for engagement with ratchet teeth l l formed upon the adjacent surface of the nut. As the case ll is moved downwardly by a suitable hand-operated lever 15- the projections 13- are brought into engagement-with the teeth -14 preventing rotation of the nut -1 2, thereby forcing rotation of the shaft 10 and actuator 5-. The operating handle 15 is adapted to be returned to starting position after each operation by a suitable spring 16, and upon the return movement of case 11 the'projections 13 are moved out of engagement with the teeth -l4. allowing the nut 12' to rotate within the case, thereby allowing the return of the case 11 and nut 12 to starting position without causing rotation of the shaft 10.

The ends of the shaft -l0 are preferably of substantially conical shape and one of the same, as 17, is journaled in a suitend 22 of the shaft 10 is journaled in a bearing formed upon a bar-23+ positioned within the case 19- and having .one of its ends, as 24.-'-, flanged upwardly and slotted for the reception of the neck portion 25 of athumb screw 26 having a threaded relation with and adjustable through the case -19. The opposite end of the 23 is provided'with an elongated slot 27- in which is seated a screw orbolt -28. mounted in the case -l9 and having its free end withinthe case provided with a nut -30. and pin -31-.

. The nut 30 may be loosened or tight ened by turning the screw --28- from the outside of the case, and, when'in loosened condition, the bar 23 as awhole may be -moved longitudinally of I case -19- by means of set screw 26, as limited by the slot 27. This. movement of bar 23 moves the end of the shaft 9 toward tuating mechanism, the shaft and actuator,

-in my co-pending application Serial No.

Although I have shown and described one particular structure for accomplishing the objects of this invention, I do not desire to limit myself to any particular construction, form or arrangement, as many changes may be made in the same without departing from the spirit of this invention as set forth in the appended claims.-

WVhat I claim is 1. In a signal, a case, a bar Within and extending longitudinally of the case, one of said members provided with a slot, the other member carrying a bolt seated in said slot, a shaft having a bearing in said bar, and

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2. In a signal, a casing, a shaft having bearings Within the casing, one of said bearings formed in a bar having an elongated slot, a bolt engaged with the casing and having a portion extending through said slot, means adjustable on the bolt for holding the bar in any predetermined position with respect to the bolt, and means operable eXteriorly of the casing 'and adjustable through the casing for moving said bar with respect to said bolt.

In Witness whereof I have hereunto set my hand this 27th day of September, 1915.

WILLIAM SPARKS. Witnesses:

LILLIAN E. VVUNDERLIGH, N. J CoRBE'r'r.

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