US884768A - Foot-bolt for holding doors. - Google Patents

Description

No. 884,768. PATENTED APR. 14, 1908.

- H. R..SHAPER.

FOOT-BOLT FOR HOLDING DOORS.

APPLICATION FILED JUNE 5; 1907.

7 Q L. h /0 $230868 0 r Attorneys.

HOMER R. SHAFER, OF DETROIT, MICHIGAN.

FOOT-BOLT FOR HOLDING DOORS.

' Specification of Letters Patent.

Patented April 14, 1908.

I Application filed June 5, 1907. Serial No. 377,358.

To all whom it may concern:

Be it known that I, HOMER R. SHAFER, a citizen of the United States, residing at Detroit,'county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Foot-Bolts for Holding Doors, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to foot bolts adapted and intended to be used for the purpose of holding a door in the position to which it may be swung other than its latched position. The device consists of a casing adapted to be attached to the door the casing contains within itself a projectile bolt adapted to retract automatically from a projected position, but which is provided with means for holding the bolt in the rojected position and in which the bolt itseff is provided with a second spring adapted to project it beyond or forward with respect to the retracting portion of the bolt.

In the drawings :Figure 1, is a perspective of the bolt attached to a door. Fig. 2, is a vertical section. Fig. 3, is a plan of a ring clamp used in connection with the bolt.

A casing which is adapted to be secured to the door is indicated at 1, this is tubular and semi-circular. In the upper end it engages a sliding casing 2, to which is secured the upper end of a retracting rod or bolt 3. Across the casing 1, is a diagram or abutment 5 against which the lower end of a retracting spring 6 engages. The retracting spring 6 is referably spiral in form and surrounds the bar or bolt 3, between the abutment 5 and an abutment 7, contained within the sliding head part 2 of the structure. An abutment head 8 is secured to the bar 3, below the fixed abutment 5. The spring 6 when compressed between its terminal abutments 5 and 7 by downward pressure upon the upper surface of the abutment, as by the foot of the operator, yieldingly opposes the descent of the bolt 3, which in turn causes the forcing of the cushion 10 against the floor. At the lower end of the casing is a second sliding or telescoping casing 9, which engages in the casing 1, and which is provided with a cup on its underside to contain a rubber or cushion 10. A diaphragm 11 forms the base of the cup; above this diaphragm 11 extends a tubular coupling 12, which engages telescopically over the lower end of the rod 3 and is held from escaping from the rod 3 by a collar 13, which terminates the rod 3 and engages under the inturned flanges 14 on the telescopic tube 12 this allows the rod 3 to move freely down in the tube, this increasing the tension of spring 15 to any desired amount, but engages to lift the tube and the cushion 10; the tension of spring 6 does not necessarily counteract the tension of the spring 15 neXt referred to.

A strong spring 15 engages around the bar 3 between the abutment 8 and the upper surface of the diaphragm 11; this strong spring serves to project the telescoping member 9, of which the cup member forms a part, and which contains the cushion 10 downward against the floor with a strength which is determined by the amount of pressure exerted in forcing it downward in the first instance.

The sliding member 2 is held in place after it has been forced downward by the foot, or in any other way, by a ring clamp 16, pivoted to the casing 1, and engaging around the sliding member 2 and provided with an extension 17 by means of which it may be pressed down by the foot to release its clamping action on the member 2.

The case 1 is provided with cars at convenient points along its length, containing appropriate holes for the insertion of holding screws.

While the case is shown and described as semi-cylindrical, with a plain rear facing, it is quite evident that that is a feature of construction merely, adapting it to be secured readily to a flat or plane surface, and that the special shape or form given to the various parts is not material to the invention, of which the novelty consists in the use of the forcing spring 15, which holds the cushion member 10 against the floor with any desired amount of force and without reference to the tension for the time being stored on the lifting spring 3, which lifts the entire bolt when the clamp 16 is released.

, What I claim is In combination with a main casing pro-' of said main casing, one of said casings being depressed condition against the force of its 10 fixed to its end of the bolt, and the other spring, substantially as described.

having a sliding connection therewith, com- In testimony whereof, I, sign this specifipression springs engaging between each side cation in the presence of two witnesses.

pf said abutment and the inner face of the HOMER R SHAFER elescoping casing opposite the same, and a clamping ring engaging about the upper one Witnesses: of said telescoping casings with a sliding con- CHARLES F. BURTON, nection, whereby the same may be held in MAY E. KOTT.

Images