US174754A - Improvement in burglar-alarms - Google Patents

Description

No.17L754.

F. H. ALLEN & :r. LATHROP.

BURGLAR ALARMs.

Patented March 14, 1876.

NPETERS. PHOTO-UTHOGRAPHER, WASHINGTON D C.

ried in a valise or pocket.

UNITED STATES FRANK H. ALLEN AND JAMES LATHROP, OF NOR PATENT DFFIOE.

OF ONE-THIRD THEIR RIGHT TO JOHN E. WARNER, OF SAME PLACE.

IMPROVEMENT IN BURGLAR -ALARMS.

Specification forming part of Letters Patent No. 174,754, dated March 14, 1876; application filed Q February 18, 1876.

To atl whom it may concern:

Be it known that we, FRANK H. ALLEN and JAMES LATHROP, both of Norwich, county of New London and State of Connecticut, have invented certain Improvements in Burglaropened by any one effecting an entrance.

Our especial object is to render a lodgingroom perfectly secure from burglars visits, or, it such visits occur, to awaken the sleeper, so that he may be enabled to meet the intruder and protect his property and life.

In the accompanying drawing, A and B are bells of con 'enient size and shape to be car- On A is a projection or stud, G, which is threaded and tapped into the bell B at f. g is a string or elastic cord, on one end of which is a screw-eye, h, the other end being made fast to the stud 0. Through the stud O is a hole, 6, of sufficicnt size to receive a pin or needle. a, a a a are projections on the bells AB, pointing toward the central shaft or stud G. d is a weight or hammer, hangingon the wire b, which, in turn, is fastened lightly to the stud 0 by loops or rings at either end, i i.

To operate this device on a door, wind the cord g around the stud 0. Screw the screweye it into the door or door-frame deep enough to sustain the weight of the bells. .Then, with When the door is opened by any one from the outside, the alarm. is pushed off the pin, and the weight of the bells causes the cord to he unwound, giving a rotarymotion to the bells, the weight or hammer d at the same time striking the projections a a a a alternately, making a noise loud enough to awaken the soundest sleeper.

Should an elastic cord be used, the impetus gained by the revolving bells in descending will cause the cord to unwind and rewind itself several times before it becomes motionless. 7

We claim.

In combination with the bells A B, the pendent wire I), with the metallic hammer d,

the cord g, and screw-eye h, all arranged and operated as and for the purpose specified.

In witness whereof we have hereunto set our' hands and seals this 16th day of February, A.'D. 1876.

FRANK H. ALLEN. [L. s.]

JAMES LATHROP. [L. s] In presence of- JOHN DURHAM, J r.,' LESLIE W. BEACH.

WIGH, ooNN, ASSIGNORS

Images