US1213984A

US1213984A - Sphygmomanometer.

Info

Publication number: US1213984A
Application number: US4212315A
Authority: US
Inventors: Carl R Waser
Original assignee: PRECISION THERMOMETER AND INSTRUMENT CO
Current assignee: PRECISION THERMOMETER AND INSTRUMENT CO
Priority date: 1915-07-27
Filing date: 1915-07-27
Publication date: 1917-01-30
Anticipated expiration: 1934-01-30

Description

cant it. wasnn, or

PHILADELPHIA, l-ENNSYLVAEKIA, ASSIGNOR T0 PRECISIGN THEE- MQMETER & INSTRUT/LENT COMPANY, 035 PHILADELPHIA, PENNSYLVANIA, A COR- PORATION 015 PENNSYLVANIA.

SIPHZGMOMANQIVIETEE.

Application filed July 27, 191.5.

To all whom it may concern:

Be it known that l, CARL R. WASER, a citizen of the United States, residing in the city of Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented certain Improvements in Sphygmomanometers, of which the following is a .specification.

culty has been experlenced in compensating for the wear, compression and shrinkage which occur in joint packings with time and use.

My improvements are designed to provide means for pressing together the jointed parts of a collapsible or take-down instrument so as to secure tight joints, and to this end they are characterized, in the preferred form of the construction, by the use of hinged tube sections that are movable longitudinally when erected and pressed against their seats by'springs.

The character of my improvements will more fully appear by reference to the following description and the accompanying drawings in illustration thereof.

In the drawings, Figure 1 is a front eleva tion of an erected sphygmoman'ometer embodying my improvements; Fig. 2 is an enlarged broken sectional view taken on the line 22 of Fig. 1; Fig. 3 is an enlarged broken sectional view taken on the line 3-3 of Fig. 1; Fig. 4 is an enlarged broken vertical section through the tube joint shown in Fig. 1; Fig. 5 is a broken front elevation of a modified construction; Fig. 6 is an enlarged broken vertical sectional view of the modified construction taken on the line 6-6 of Fig. 5; and Fig. 7 is a sectional view taken on the line 7-7 of Fig. 6.

The mechanism illustrated comprises a case 1 provided with a hinged lid 2 which supports the base 3, the cistern 4: having its lower end set in the base, the fixture 5 con- Specification of Letters Patent.

Patented J 36 19 1?.

Serial No. 42,123.

nected with the top of the cistern, the tube lower end set in the base 3 and its upper end trated clip or sleeve 7, and the tube section 8 having on the lower end thereof the fenestrated clip or sleeve 9 which is pivotally connected by its hinge knuckles 9 with the hinge knuckles 7 of the clip 7. Spring dogs or catches 10 are fixed to the lid and provided with cam jaws 10 which are adapted for engaging the angles of the knuckles 9' to hold the erected tube section 8 in position, the joint between the tube sections being sealed by packing means comprising a washer 11 held in a ring 11. A scale, comprising a section 12 fixed to the lid and a folding section 13 hinged to the section 12 by pivotally connected

knuckles

12 and 13 on the respective sections, provides means for reading the height of liquid in the tube. In accordance with my present invention, in the form illustrated in Figs. 1, 2, 3, and 4, the bearing 14 of the fixture 5 is provided with a slot 14: through which passes a screw or stud 15 into the lid 2, and the bearing 1; of the base 3 is provided with the slot 16 through which a screw or stud 17 passes into the lid. The top of the tube section 6 has fixed thereon a fenestrated sleeve 18 which extends through and is adapted to slide within the sleeve orclip 7, fixed to the lid, whereby the

parts

3, 4, 5 and 6 are permitted a limited longitudinal movement of reciprocation, the inner sleeve having a flange 18 on its top to limit the downward movement thereof. A leaf spring 19 is fixed to the lid 2 adjacent to the base 3, the base resting 'upon and being supported by the spring.

lln operation, when the lid 2 is elevated and the tube section 8 is erected, its knuckles 9 engage the cam surfaces of the jaws 10' and spread the springs 10, which spring back and cause the jaws to engage the tops of the knuckles when the section 8 has been brought into alinement with the section 6. As the upper section 8 moves to its alined position, the lower end thereof presses against the washer 11 which is thus pressed against the upper end of the section 6 and the section 6 is pressed downward. As the action of the spring 19 on the base 3 resists the movement of the tube 6 with the sleeve 18 thereon, the

parts

6 and 8 are pressed firmly against the washer 11, the spring acttion 6, the upper acts through the washer 11 ing to effect this relation under all conditions of use. p

In the modified form illustrated in Figs. 5, 6,. and 7, the tube section 8 has a fenestrated sleeve 20 fixed on the lower end thereof and movable in the fenestrated clip or sleeve 9, the clip 9 having'lugs 9" thereon and the clip 20 having lugs 20 thereon which are connected by coiled springs 21. i

When the section 8 is turned from the closed to the erected position, the springs 10 are pressed outwardly by engagement of the knuckles 9 with the jaws or cams 10 until the latter are able to engage above the angles of the knuckles, when the jaws lock the sleeve in position. In turning the upper section 8 into alinement with the lower secend of the lower section upon the upper section which, with the sleeve 20 thereon, is moved upwardly through the sleeve 9 against the action of the springs 21, whereby pressure is constantly maintained upon the packing, The sleeve 20 is provided with a shoulder 20 which limits the movement of the part 8 through the part 9 due to the action of the springs21.

Having described my invention, I claim:

1. In an instrument of the character described, a plurality of tube sections, hinged devices with which said sections are respectively connected, and means for moving one of said tube sections relatively to the device with which it is connected so as to maintain a tight joint between said tube sections.

2. In an instrument of the character described, a plurality of tube sections, hinged clips connecting said sections,.a spring for pressing one of the alined sections longitudinally toward the other, and means for holding the other of said sections against the action of said spring.

3. In an instrument of the character described, liquid supply means and a tube section connected in communicating relation, a supporting device to which said means and section are connected in movable relation, a second tube section hinged relative to said section first named, and means comprising a spring acting against sa1d means and section first named for maintaining a tight joint between said sections.

' In an instrument of the character described, liquid supply means and a tube section connected therewith, a supporting device to which said means and section are connected in movable relation, means comprising a second tube section hinged relatively to said supporting device so as to be movable into alinement with said section first named and exert pressure against the same, and resilient means for supporting said supply means and tube section first named.

5. In an instrument of the character described, supporting means comprising a clip, a longitudinally movable tube section guided by said clip, a second tube section, and means comprising a spring for maintaining a tight joint between said sections.

6. In an instrument of the character described, supporting means comprising a fenestrated sleeve, a tube section having a fenestrated sleeve on an end thereof and movable longitudinally in said sleeve first named, a fenestrated sleeve hinged to said sleeve first named, a tube section set in said sleeve third named so as to be movable into registration with and exert pressure on the registering end of said section first named, and a spring for supporting said section first named.

7 In an instrument of the character described, a pair of hinged clips, a tube section having an end held so as to be movable longitudinally in one of said clips, a tube section having an end held in the other of said clips, a washer, means for holding said Washer on an end of one of said sections, and means for pressing said longitudinally movable section toward the complementary section in registration therewith.

In testimony whereof I have hereunto set my name this 26th day of July, 1915.

CARL R. WASER.